1 /* 2 * m68k translation 3 * 4 * Copyright (c) 2005-2007 CodeSourcery 5 * Written by Paul Brook 6 * 7 * This library is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * This library is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 19 */ 20 21 #include "qemu/osdep.h" 22 #include "cpu.h" 23 #include "disas/disas.h" 24 #include "exec/exec-all.h" 25 #include "tcg/tcg-op.h" 26 #include "qemu/log.h" 27 #include "qemu/qemu-print.h" 28 #include "exec/translator.h" 29 30 #include "exec/helper-proto.h" 31 #include "exec/helper-gen.h" 32 33 #include "exec/log.h" 34 #include "fpu/softfloat.h" 35 36 #define HELPER_H "helper.h" 37 #include "exec/helper-info.c.inc" 38 #undef HELPER_H 39 40 //#define DEBUG_DISPATCH 1 41 42 #define DEFO32(name, offset) static TCGv QREG_##name; 43 #define DEFO64(name, offset) static TCGv_i64 QREG_##name; 44 #include "qregs.h.inc" 45 #undef DEFO32 46 #undef DEFO64 47 48 static TCGv_i32 cpu_halted; 49 static TCGv_i32 cpu_exception_index; 50 51 static char cpu_reg_names[2 * 8 * 3 + 5 * 4]; 52 static TCGv cpu_dregs[8]; 53 static TCGv cpu_aregs[8]; 54 static TCGv_i64 cpu_macc[4]; 55 56 #define REG(insn, pos) (((insn) >> (pos)) & 7) 57 #define DREG(insn, pos) cpu_dregs[REG(insn, pos)] 58 #define AREG(insn, pos) get_areg(s, REG(insn, pos)) 59 #define MACREG(acc) cpu_macc[acc] 60 #define QREG_SP get_areg(s, 7) 61 62 static TCGv NULL_QREG; 63 #define IS_NULL_QREG(t) (t == NULL_QREG) 64 /* Used to distinguish stores from bad addressing modes. */ 65 static TCGv store_dummy; 66 67 void m68k_tcg_init(void) 68 { 69 char *p; 70 int i; 71 72 #define DEFO32(name, offset) \ 73 QREG_##name = tcg_global_mem_new_i32(tcg_env, \ 74 offsetof(CPUM68KState, offset), #name); 75 #define DEFO64(name, offset) \ 76 QREG_##name = tcg_global_mem_new_i64(tcg_env, \ 77 offsetof(CPUM68KState, offset), #name); 78 #include "qregs.h.inc" 79 #undef DEFO32 80 #undef DEFO64 81 82 cpu_halted = tcg_global_mem_new_i32(tcg_env, 83 -offsetof(M68kCPU, env) + 84 offsetof(CPUState, halted), "HALTED"); 85 cpu_exception_index = tcg_global_mem_new_i32(tcg_env, 86 -offsetof(M68kCPU, env) + 87 offsetof(CPUState, exception_index), 88 "EXCEPTION"); 89 90 p = cpu_reg_names; 91 for (i = 0; i < 8; i++) { 92 sprintf(p, "D%d", i); 93 cpu_dregs[i] = tcg_global_mem_new(tcg_env, 94 offsetof(CPUM68KState, dregs[i]), p); 95 p += 3; 96 sprintf(p, "A%d", i); 97 cpu_aregs[i] = tcg_global_mem_new(tcg_env, 98 offsetof(CPUM68KState, aregs[i]), p); 99 p += 3; 100 } 101 for (i = 0; i < 4; i++) { 102 sprintf(p, "ACC%d", i); 103 cpu_macc[i] = tcg_global_mem_new_i64(tcg_env, 104 offsetof(CPUM68KState, macc[i]), p); 105 p += 5; 106 } 107 108 NULL_QREG = tcg_global_mem_new(tcg_env, -4, "NULL"); 109 store_dummy = tcg_global_mem_new(tcg_env, -8, "NULL"); 110 } 111 112 /* internal defines */ 113 typedef struct DisasContext { 114 DisasContextBase base; 115 CPUM68KState *env; 116 target_ulong pc; 117 target_ulong pc_prev; 118 CCOp cc_op; /* Current CC operation */ 119 int cc_op_synced; 120 TCGv_i64 mactmp; 121 int done_mac; 122 int writeback_mask; 123 TCGv writeback[8]; 124 bool ss_active; 125 } DisasContext; 126 127 static TCGv get_areg(DisasContext *s, unsigned regno) 128 { 129 if (s->writeback_mask & (1 << regno)) { 130 return s->writeback[regno]; 131 } else { 132 return cpu_aregs[regno]; 133 } 134 } 135 136 static void delay_set_areg(DisasContext *s, unsigned regno, 137 TCGv val, bool give_temp) 138 { 139 if (s->writeback_mask & (1 << regno)) { 140 if (give_temp) { 141 s->writeback[regno] = val; 142 } else { 143 tcg_gen_mov_i32(s->writeback[regno], val); 144 } 145 } else { 146 s->writeback_mask |= 1 << regno; 147 if (give_temp) { 148 s->writeback[regno] = val; 149 } else { 150 TCGv tmp = tcg_temp_new(); 151 s->writeback[regno] = tmp; 152 tcg_gen_mov_i32(tmp, val); 153 } 154 } 155 } 156 157 static void do_writebacks(DisasContext *s) 158 { 159 unsigned mask = s->writeback_mask; 160 if (mask) { 161 s->writeback_mask = 0; 162 do { 163 unsigned regno = ctz32(mask); 164 tcg_gen_mov_i32(cpu_aregs[regno], s->writeback[regno]); 165 mask &= mask - 1; 166 } while (mask); 167 } 168 } 169 170 /* is_jmp field values */ 171 #define DISAS_JUMP DISAS_TARGET_0 /* only pc was modified dynamically */ 172 #define DISAS_EXIT DISAS_TARGET_1 /* cpu state was modified dynamically */ 173 174 #if defined(CONFIG_USER_ONLY) 175 #define IS_USER(s) 1 176 #else 177 #define IS_USER(s) (!(s->base.tb->flags & TB_FLAGS_MSR_S)) 178 #define SFC_INDEX(s) ((s->base.tb->flags & TB_FLAGS_SFC_S) ? \ 179 MMU_KERNEL_IDX : MMU_USER_IDX) 180 #define DFC_INDEX(s) ((s->base.tb->flags & TB_FLAGS_DFC_S) ? \ 181 MMU_KERNEL_IDX : MMU_USER_IDX) 182 #endif 183 184 typedef void (*disas_proc)(CPUM68KState *env, DisasContext *s, uint16_t insn); 185 186 #ifdef DEBUG_DISPATCH 187 #define DISAS_INSN(name) \ 188 static void real_disas_##name(CPUM68KState *env, DisasContext *s, \ 189 uint16_t insn); \ 190 static void disas_##name(CPUM68KState *env, DisasContext *s, \ 191 uint16_t insn) \ 192 { \ 193 qemu_log("Dispatch " #name "\n"); \ 194 real_disas_##name(env, s, insn); \ 195 } \ 196 static void real_disas_##name(CPUM68KState *env, DisasContext *s, \ 197 uint16_t insn) 198 #else 199 #define DISAS_INSN(name) \ 200 static void disas_##name(CPUM68KState *env, DisasContext *s, \ 201 uint16_t insn) 202 #endif 203 204 static const uint8_t cc_op_live[CC_OP_NB] = { 205 [CC_OP_DYNAMIC] = CCF_C | CCF_V | CCF_Z | CCF_N | CCF_X, 206 [CC_OP_FLAGS] = CCF_C | CCF_V | CCF_Z | CCF_N | CCF_X, 207 [CC_OP_ADDB ... CC_OP_ADDL] = CCF_X | CCF_N | CCF_V, 208 [CC_OP_SUBB ... CC_OP_SUBL] = CCF_X | CCF_N | CCF_V, 209 [CC_OP_CMPB ... CC_OP_CMPL] = CCF_X | CCF_N | CCF_V, 210 [CC_OP_LOGIC] = CCF_X | CCF_N 211 }; 212 213 static void set_cc_op(DisasContext *s, CCOp op) 214 { 215 CCOp old_op = s->cc_op; 216 int dead; 217 218 if (old_op == op) { 219 return; 220 } 221 s->cc_op = op; 222 s->cc_op_synced = 0; 223 224 /* 225 * Discard CC computation that will no longer be used. 226 * Note that X and N are never dead. 227 */ 228 dead = cc_op_live[old_op] & ~cc_op_live[op]; 229 if (dead & CCF_C) { 230 tcg_gen_discard_i32(QREG_CC_C); 231 } 232 if (dead & CCF_Z) { 233 tcg_gen_discard_i32(QREG_CC_Z); 234 } 235 if (dead & CCF_V) { 236 tcg_gen_discard_i32(QREG_CC_V); 237 } 238 } 239 240 /* Update the CPU env CC_OP state. */ 241 static void update_cc_op(DisasContext *s) 242 { 243 if (!s->cc_op_synced) { 244 s->cc_op_synced = 1; 245 tcg_gen_movi_i32(QREG_CC_OP, s->cc_op); 246 } 247 } 248 249 /* Generate a jump to an immediate address. */ 250 static void gen_jmp_im(DisasContext *s, uint32_t dest) 251 { 252 update_cc_op(s); 253 tcg_gen_movi_i32(QREG_PC, dest); 254 s->base.is_jmp = DISAS_JUMP; 255 } 256 257 /* Generate a jump to the address in qreg DEST. */ 258 static void gen_jmp(DisasContext *s, TCGv dest) 259 { 260 update_cc_op(s); 261 tcg_gen_mov_i32(QREG_PC, dest); 262 s->base.is_jmp = DISAS_JUMP; 263 } 264 265 static void gen_raise_exception(int nr) 266 { 267 gen_helper_raise_exception(tcg_env, tcg_constant_i32(nr)); 268 } 269 270 static void gen_raise_exception_format2(DisasContext *s, int nr, 271 target_ulong this_pc) 272 { 273 /* 274 * Pass the address of the insn to the exception handler, 275 * for recording in the Format $2 (6-word) stack frame. 276 * Re-use mmu.ar for the purpose, since that's only valid 277 * after tlb_fill. 278 */ 279 tcg_gen_st_i32(tcg_constant_i32(this_pc), tcg_env, 280 offsetof(CPUM68KState, mmu.ar)); 281 gen_raise_exception(nr); 282 s->base.is_jmp = DISAS_NORETURN; 283 } 284 285 static void gen_exception(DisasContext *s, uint32_t dest, int nr) 286 { 287 update_cc_op(s); 288 tcg_gen_movi_i32(QREG_PC, dest); 289 290 gen_raise_exception(nr); 291 292 s->base.is_jmp = DISAS_NORETURN; 293 } 294 295 static inline void gen_addr_fault(DisasContext *s) 296 { 297 gen_exception(s, s->base.pc_next, EXCP_ADDRESS); 298 } 299 300 /* 301 * Generate a load from the specified address. Narrow values are 302 * sign extended to full register width. 303 */ 304 static inline TCGv gen_load(DisasContext *s, int opsize, TCGv addr, 305 int sign, int index) 306 { 307 TCGv tmp = tcg_temp_new_i32(); 308 309 switch (opsize) { 310 case OS_BYTE: 311 case OS_WORD: 312 case OS_LONG: 313 tcg_gen_qemu_ld_tl(tmp, addr, index, 314 opsize | (sign ? MO_SIGN : 0) | MO_TE); 315 break; 316 default: 317 g_assert_not_reached(); 318 } 319 return tmp; 320 } 321 322 /* Generate a store. */ 323 static inline void gen_store(DisasContext *s, int opsize, TCGv addr, TCGv val, 324 int index) 325 { 326 switch (opsize) { 327 case OS_BYTE: 328 case OS_WORD: 329 case OS_LONG: 330 tcg_gen_qemu_st_tl(val, addr, index, opsize | MO_TE); 331 break; 332 default: 333 g_assert_not_reached(); 334 } 335 } 336 337 typedef enum { 338 EA_STORE, 339 EA_LOADU, 340 EA_LOADS 341 } ea_what; 342 343 /* 344 * Generate an unsigned load if VAL is 0 a signed load if val is -1, 345 * otherwise generate a store. 346 */ 347 static TCGv gen_ldst(DisasContext *s, int opsize, TCGv addr, TCGv val, 348 ea_what what, int index) 349 { 350 if (what == EA_STORE) { 351 gen_store(s, opsize, addr, val, index); 352 return store_dummy; 353 } else { 354 return gen_load(s, opsize, addr, what == EA_LOADS, index); 355 } 356 } 357 358 /* Read a 16-bit immediate constant */ 359 static inline uint16_t read_im16(CPUM68KState *env, DisasContext *s) 360 { 361 uint16_t im; 362 im = translator_lduw(env, &s->base, s->pc); 363 s->pc += 2; 364 return im; 365 } 366 367 /* Read an 8-bit immediate constant */ 368 static inline uint8_t read_im8(CPUM68KState *env, DisasContext *s) 369 { 370 return read_im16(env, s); 371 } 372 373 /* Read a 32-bit immediate constant. */ 374 static inline uint32_t read_im32(CPUM68KState *env, DisasContext *s) 375 { 376 uint32_t im; 377 im = read_im16(env, s) << 16; 378 im |= 0xffff & read_im16(env, s); 379 return im; 380 } 381 382 /* Read a 64-bit immediate constant. */ 383 static inline uint64_t read_im64(CPUM68KState *env, DisasContext *s) 384 { 385 uint64_t im; 386 im = (uint64_t)read_im32(env, s) << 32; 387 im |= (uint64_t)read_im32(env, s); 388 return im; 389 } 390 391 /* Calculate and address index. */ 392 static TCGv gen_addr_index(DisasContext *s, uint16_t ext, TCGv tmp) 393 { 394 TCGv add; 395 int scale; 396 397 add = (ext & 0x8000) ? AREG(ext, 12) : DREG(ext, 12); 398 if ((ext & 0x800) == 0) { 399 tcg_gen_ext16s_i32(tmp, add); 400 add = tmp; 401 } 402 scale = (ext >> 9) & 3; 403 if (scale != 0) { 404 tcg_gen_shli_i32(tmp, add, scale); 405 add = tmp; 406 } 407 return add; 408 } 409 410 /* 411 * Handle a base + index + displacement effective address. 412 * A NULL_QREG base means pc-relative. 413 */ 414 static TCGv gen_lea_indexed(CPUM68KState *env, DisasContext *s, TCGv base) 415 { 416 uint32_t offset; 417 uint16_t ext; 418 TCGv add; 419 TCGv tmp; 420 uint32_t bd, od; 421 422 offset = s->pc; 423 ext = read_im16(env, s); 424 425 if ((ext & 0x800) == 0 && !m68k_feature(s->env, M68K_FEATURE_WORD_INDEX)) 426 return NULL_QREG; 427 428 if (m68k_feature(s->env, M68K_FEATURE_M68K) && 429 !m68k_feature(s->env, M68K_FEATURE_SCALED_INDEX)) { 430 ext &= ~(3 << 9); 431 } 432 433 if (ext & 0x100) { 434 /* full extension word format */ 435 if (!m68k_feature(s->env, M68K_FEATURE_EXT_FULL)) 436 return NULL_QREG; 437 438 if ((ext & 0x30) > 0x10) { 439 /* base displacement */ 440 if ((ext & 0x30) == 0x20) { 441 bd = (int16_t)read_im16(env, s); 442 } else { 443 bd = read_im32(env, s); 444 } 445 } else { 446 bd = 0; 447 } 448 tmp = tcg_temp_new(); 449 if ((ext & 0x44) == 0) { 450 /* pre-index */ 451 add = gen_addr_index(s, ext, tmp); 452 } else { 453 add = NULL_QREG; 454 } 455 if ((ext & 0x80) == 0) { 456 /* base not suppressed */ 457 if (IS_NULL_QREG(base)) { 458 base = tcg_constant_i32(offset + bd); 459 bd = 0; 460 } 461 if (!IS_NULL_QREG(add)) { 462 tcg_gen_add_i32(tmp, add, base); 463 add = tmp; 464 } else { 465 add = base; 466 } 467 } 468 if (!IS_NULL_QREG(add)) { 469 if (bd != 0) { 470 tcg_gen_addi_i32(tmp, add, bd); 471 add = tmp; 472 } 473 } else { 474 add = tcg_constant_i32(bd); 475 } 476 if ((ext & 3) != 0) { 477 /* memory indirect */ 478 base = gen_load(s, OS_LONG, add, 0, IS_USER(s)); 479 if ((ext & 0x44) == 4) { 480 add = gen_addr_index(s, ext, tmp); 481 tcg_gen_add_i32(tmp, add, base); 482 add = tmp; 483 } else { 484 add = base; 485 } 486 if ((ext & 3) > 1) { 487 /* outer displacement */ 488 if ((ext & 3) == 2) { 489 od = (int16_t)read_im16(env, s); 490 } else { 491 od = read_im32(env, s); 492 } 493 } else { 494 od = 0; 495 } 496 if (od != 0) { 497 tcg_gen_addi_i32(tmp, add, od); 498 add = tmp; 499 } 500 } 501 } else { 502 /* brief extension word format */ 503 tmp = tcg_temp_new(); 504 add = gen_addr_index(s, ext, tmp); 505 if (!IS_NULL_QREG(base)) { 506 tcg_gen_add_i32(tmp, add, base); 507 if ((int8_t)ext) 508 tcg_gen_addi_i32(tmp, tmp, (int8_t)ext); 509 } else { 510 tcg_gen_addi_i32(tmp, add, offset + (int8_t)ext); 511 } 512 add = tmp; 513 } 514 return add; 515 } 516 517 /* Sign or zero extend a value. */ 518 519 static inline void gen_ext(TCGv res, TCGv val, int opsize, int sign) 520 { 521 switch (opsize) { 522 case OS_BYTE: 523 case OS_WORD: 524 case OS_LONG: 525 tcg_gen_ext_i32(res, val, opsize | (sign ? MO_SIGN : 0)); 526 break; 527 default: 528 g_assert_not_reached(); 529 } 530 } 531 532 /* Evaluate all the CC flags. */ 533 534 static void gen_flush_flags(DisasContext *s) 535 { 536 TCGv t0, t1; 537 538 switch (s->cc_op) { 539 case CC_OP_FLAGS: 540 return; 541 542 case CC_OP_ADDB: 543 case CC_OP_ADDW: 544 case CC_OP_ADDL: 545 tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X); 546 tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N); 547 /* Compute signed overflow for addition. */ 548 t0 = tcg_temp_new(); 549 t1 = tcg_temp_new(); 550 tcg_gen_sub_i32(t0, QREG_CC_N, QREG_CC_V); 551 gen_ext(t0, t0, s->cc_op - CC_OP_ADDB, 1); 552 tcg_gen_xor_i32(t1, QREG_CC_N, QREG_CC_V); 553 tcg_gen_xor_i32(QREG_CC_V, QREG_CC_V, t0); 554 tcg_gen_andc_i32(QREG_CC_V, t1, QREG_CC_V); 555 break; 556 557 case CC_OP_SUBB: 558 case CC_OP_SUBW: 559 case CC_OP_SUBL: 560 tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X); 561 tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N); 562 /* Compute signed overflow for subtraction. */ 563 t0 = tcg_temp_new(); 564 t1 = tcg_temp_new(); 565 tcg_gen_add_i32(t0, QREG_CC_N, QREG_CC_V); 566 gen_ext(t0, t0, s->cc_op - CC_OP_SUBB, 1); 567 tcg_gen_xor_i32(t1, QREG_CC_N, t0); 568 tcg_gen_xor_i32(QREG_CC_V, QREG_CC_V, t0); 569 tcg_gen_and_i32(QREG_CC_V, QREG_CC_V, t1); 570 break; 571 572 case CC_OP_CMPB: 573 case CC_OP_CMPW: 574 case CC_OP_CMPL: 575 tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_C, QREG_CC_N, QREG_CC_V); 576 tcg_gen_sub_i32(QREG_CC_Z, QREG_CC_N, QREG_CC_V); 577 gen_ext(QREG_CC_Z, QREG_CC_Z, s->cc_op - CC_OP_CMPB, 1); 578 /* Compute signed overflow for subtraction. */ 579 t0 = tcg_temp_new(); 580 tcg_gen_xor_i32(t0, QREG_CC_Z, QREG_CC_N); 581 tcg_gen_xor_i32(QREG_CC_V, QREG_CC_V, QREG_CC_N); 582 tcg_gen_and_i32(QREG_CC_V, QREG_CC_V, t0); 583 tcg_gen_mov_i32(QREG_CC_N, QREG_CC_Z); 584 break; 585 586 case CC_OP_LOGIC: 587 tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N); 588 tcg_gen_movi_i32(QREG_CC_C, 0); 589 tcg_gen_movi_i32(QREG_CC_V, 0); 590 break; 591 592 case CC_OP_DYNAMIC: 593 gen_helper_flush_flags(tcg_env, QREG_CC_OP); 594 s->cc_op_synced = 1; 595 break; 596 597 default: 598 gen_helper_flush_flags(tcg_env, tcg_constant_i32(s->cc_op)); 599 s->cc_op_synced = 1; 600 break; 601 } 602 603 /* Note that flush_flags also assigned to env->cc_op. */ 604 s->cc_op = CC_OP_FLAGS; 605 } 606 607 static inline TCGv gen_extend(DisasContext *s, TCGv val, int opsize, int sign) 608 { 609 TCGv tmp; 610 611 if (opsize == OS_LONG) { 612 tmp = val; 613 } else { 614 tmp = tcg_temp_new(); 615 gen_ext(tmp, val, opsize, sign); 616 } 617 618 return tmp; 619 } 620 621 static void gen_logic_cc(DisasContext *s, TCGv val, int opsize) 622 { 623 gen_ext(QREG_CC_N, val, opsize, 1); 624 set_cc_op(s, CC_OP_LOGIC); 625 } 626 627 static void gen_update_cc_cmp(DisasContext *s, TCGv dest, TCGv src, int opsize) 628 { 629 tcg_gen_mov_i32(QREG_CC_N, dest); 630 tcg_gen_mov_i32(QREG_CC_V, src); 631 set_cc_op(s, CC_OP_CMPB + opsize); 632 } 633 634 static void gen_update_cc_add(TCGv dest, TCGv src, int opsize) 635 { 636 gen_ext(QREG_CC_N, dest, opsize, 1); 637 tcg_gen_mov_i32(QREG_CC_V, src); 638 } 639 640 static inline int opsize_bytes(int opsize) 641 { 642 switch (opsize) { 643 case OS_BYTE: return 1; 644 case OS_WORD: return 2; 645 case OS_LONG: return 4; 646 case OS_SINGLE: return 4; 647 case OS_DOUBLE: return 8; 648 case OS_EXTENDED: return 12; 649 case OS_PACKED: return 12; 650 default: 651 g_assert_not_reached(); 652 } 653 } 654 655 static inline int insn_opsize(int insn) 656 { 657 switch ((insn >> 6) & 3) { 658 case 0: return OS_BYTE; 659 case 1: return OS_WORD; 660 case 2: return OS_LONG; 661 default: 662 g_assert_not_reached(); 663 } 664 } 665 666 static inline int ext_opsize(int ext, int pos) 667 { 668 switch ((ext >> pos) & 7) { 669 case 0: return OS_LONG; 670 case 1: return OS_SINGLE; 671 case 2: return OS_EXTENDED; 672 case 3: return OS_PACKED; 673 case 4: return OS_WORD; 674 case 5: return OS_DOUBLE; 675 case 6: return OS_BYTE; 676 default: 677 g_assert_not_reached(); 678 } 679 } 680 681 /* 682 * Assign value to a register. If the width is less than the register width 683 * only the low part of the register is set. 684 */ 685 static void gen_partset_reg(int opsize, TCGv reg, TCGv val) 686 { 687 switch (opsize) { 688 case OS_BYTE: 689 tcg_gen_deposit_i32(reg, reg, val, 0, 8); 690 break; 691 case OS_WORD: 692 tcg_gen_deposit_i32(reg, reg, val, 0, 16); 693 break; 694 case OS_LONG: 695 case OS_SINGLE: 696 tcg_gen_mov_i32(reg, val); 697 break; 698 default: 699 g_assert_not_reached(); 700 } 701 } 702 703 /* 704 * Generate code for an "effective address". Does not adjust the base 705 * register for autoincrement addressing modes. 706 */ 707 static TCGv gen_lea_mode(CPUM68KState *env, DisasContext *s, 708 int mode, int reg0, int opsize) 709 { 710 TCGv reg; 711 TCGv tmp; 712 uint16_t ext; 713 uint32_t offset; 714 715 switch (mode) { 716 case 0: /* Data register direct. */ 717 case 1: /* Address register direct. */ 718 return NULL_QREG; 719 case 3: /* Indirect postincrement. */ 720 if (opsize == OS_UNSIZED) { 721 return NULL_QREG; 722 } 723 /* fallthru */ 724 case 2: /* Indirect register */ 725 return get_areg(s, reg0); 726 case 4: /* Indirect predecrememnt. */ 727 if (opsize == OS_UNSIZED) { 728 return NULL_QREG; 729 } 730 reg = get_areg(s, reg0); 731 tmp = tcg_temp_new(); 732 if (reg0 == 7 && opsize == OS_BYTE && 733 m68k_feature(s->env, M68K_FEATURE_M68K)) { 734 tcg_gen_subi_i32(tmp, reg, 2); 735 } else { 736 tcg_gen_subi_i32(tmp, reg, opsize_bytes(opsize)); 737 } 738 return tmp; 739 case 5: /* Indirect displacement. */ 740 reg = get_areg(s, reg0); 741 tmp = tcg_temp_new(); 742 ext = read_im16(env, s); 743 tcg_gen_addi_i32(tmp, reg, (int16_t)ext); 744 return tmp; 745 case 6: /* Indirect index + displacement. */ 746 reg = get_areg(s, reg0); 747 return gen_lea_indexed(env, s, reg); 748 case 7: /* Other */ 749 switch (reg0) { 750 case 0: /* Absolute short. */ 751 offset = (int16_t)read_im16(env, s); 752 return tcg_constant_i32(offset); 753 case 1: /* Absolute long. */ 754 offset = read_im32(env, s); 755 return tcg_constant_i32(offset); 756 case 2: /* pc displacement */ 757 offset = s->pc; 758 offset += (int16_t)read_im16(env, s); 759 return tcg_constant_i32(offset); 760 case 3: /* pc index+displacement. */ 761 return gen_lea_indexed(env, s, NULL_QREG); 762 case 4: /* Immediate. */ 763 default: 764 return NULL_QREG; 765 } 766 } 767 /* Should never happen. */ 768 return NULL_QREG; 769 } 770 771 static TCGv gen_lea(CPUM68KState *env, DisasContext *s, uint16_t insn, 772 int opsize) 773 { 774 int mode = extract32(insn, 3, 3); 775 int reg0 = REG(insn, 0); 776 return gen_lea_mode(env, s, mode, reg0, opsize); 777 } 778 779 /* 780 * Generate code to load/store a value from/into an EA. If WHAT > 0 this is 781 * a write otherwise it is a read (0 == sign extend, -1 == zero extend). 782 * ADDRP is non-null for readwrite operands. 783 */ 784 static TCGv gen_ea_mode(CPUM68KState *env, DisasContext *s, int mode, int reg0, 785 int opsize, TCGv val, TCGv *addrp, ea_what what, 786 int index) 787 { 788 TCGv reg, tmp, result; 789 int32_t offset; 790 791 switch (mode) { 792 case 0: /* Data register direct. */ 793 reg = cpu_dregs[reg0]; 794 if (what == EA_STORE) { 795 gen_partset_reg(opsize, reg, val); 796 return store_dummy; 797 } else { 798 return gen_extend(s, reg, opsize, what == EA_LOADS); 799 } 800 case 1: /* Address register direct. */ 801 reg = get_areg(s, reg0); 802 if (what == EA_STORE) { 803 tcg_gen_mov_i32(reg, val); 804 return store_dummy; 805 } else { 806 return gen_extend(s, reg, opsize, what == EA_LOADS); 807 } 808 case 2: /* Indirect register */ 809 reg = get_areg(s, reg0); 810 return gen_ldst(s, opsize, reg, val, what, index); 811 case 3: /* Indirect postincrement. */ 812 reg = get_areg(s, reg0); 813 result = gen_ldst(s, opsize, reg, val, what, index); 814 if (what == EA_STORE || !addrp) { 815 tmp = tcg_temp_new(); 816 if (reg0 == 7 && opsize == OS_BYTE && 817 m68k_feature(s->env, M68K_FEATURE_M68K)) { 818 tcg_gen_addi_i32(tmp, reg, 2); 819 } else { 820 tcg_gen_addi_i32(tmp, reg, opsize_bytes(opsize)); 821 } 822 delay_set_areg(s, reg0, tmp, true); 823 } 824 return result; 825 case 4: /* Indirect predecrememnt. */ 826 if (addrp && what == EA_STORE) { 827 tmp = *addrp; 828 } else { 829 tmp = gen_lea_mode(env, s, mode, reg0, opsize); 830 if (IS_NULL_QREG(tmp)) { 831 return tmp; 832 } 833 if (addrp) { 834 *addrp = tmp; 835 } 836 } 837 result = gen_ldst(s, opsize, tmp, val, what, index); 838 if (what == EA_STORE || !addrp) { 839 delay_set_areg(s, reg0, tmp, false); 840 } 841 return result; 842 case 5: /* Indirect displacement. */ 843 case 6: /* Indirect index + displacement. */ 844 do_indirect: 845 if (addrp && what == EA_STORE) { 846 tmp = *addrp; 847 } else { 848 tmp = gen_lea_mode(env, s, mode, reg0, opsize); 849 if (IS_NULL_QREG(tmp)) { 850 return tmp; 851 } 852 if (addrp) { 853 *addrp = tmp; 854 } 855 } 856 return gen_ldst(s, opsize, tmp, val, what, index); 857 case 7: /* Other */ 858 switch (reg0) { 859 case 0: /* Absolute short. */ 860 case 1: /* Absolute long. */ 861 case 2: /* pc displacement */ 862 case 3: /* pc index+displacement. */ 863 goto do_indirect; 864 case 4: /* Immediate. */ 865 /* Sign extend values for consistency. */ 866 switch (opsize) { 867 case OS_BYTE: 868 if (what == EA_LOADS) { 869 offset = (int8_t)read_im8(env, s); 870 } else { 871 offset = read_im8(env, s); 872 } 873 break; 874 case OS_WORD: 875 if (what == EA_LOADS) { 876 offset = (int16_t)read_im16(env, s); 877 } else { 878 offset = read_im16(env, s); 879 } 880 break; 881 case OS_LONG: 882 offset = read_im32(env, s); 883 break; 884 default: 885 g_assert_not_reached(); 886 } 887 return tcg_constant_i32(offset); 888 default: 889 return NULL_QREG; 890 } 891 } 892 /* Should never happen. */ 893 return NULL_QREG; 894 } 895 896 static TCGv gen_ea(CPUM68KState *env, DisasContext *s, uint16_t insn, 897 int opsize, TCGv val, TCGv *addrp, ea_what what, int index) 898 { 899 int mode = extract32(insn, 3, 3); 900 int reg0 = REG(insn, 0); 901 return gen_ea_mode(env, s, mode, reg0, opsize, val, addrp, what, index); 902 } 903 904 static TCGv_ptr gen_fp_ptr(int freg) 905 { 906 TCGv_ptr fp = tcg_temp_new_ptr(); 907 tcg_gen_addi_ptr(fp, tcg_env, offsetof(CPUM68KState, fregs[freg])); 908 return fp; 909 } 910 911 static TCGv_ptr gen_fp_result_ptr(void) 912 { 913 TCGv_ptr fp = tcg_temp_new_ptr(); 914 tcg_gen_addi_ptr(fp, tcg_env, offsetof(CPUM68KState, fp_result)); 915 return fp; 916 } 917 918 static void gen_fp_move(TCGv_ptr dest, TCGv_ptr src) 919 { 920 TCGv t32; 921 TCGv_i64 t64; 922 923 t32 = tcg_temp_new(); 924 tcg_gen_ld16u_i32(t32, src, offsetof(FPReg, l.upper)); 925 tcg_gen_st16_i32(t32, dest, offsetof(FPReg, l.upper)); 926 927 t64 = tcg_temp_new_i64(); 928 tcg_gen_ld_i64(t64, src, offsetof(FPReg, l.lower)); 929 tcg_gen_st_i64(t64, dest, offsetof(FPReg, l.lower)); 930 } 931 932 static void gen_load_fp(DisasContext *s, int opsize, TCGv addr, TCGv_ptr fp, 933 int index) 934 { 935 TCGv tmp; 936 TCGv_i64 t64; 937 938 t64 = tcg_temp_new_i64(); 939 tmp = tcg_temp_new(); 940 switch (opsize) { 941 case OS_BYTE: 942 case OS_WORD: 943 case OS_LONG: 944 tcg_gen_qemu_ld_tl(tmp, addr, index, opsize | MO_SIGN | MO_TE); 945 gen_helper_exts32(tcg_env, fp, tmp); 946 break; 947 case OS_SINGLE: 948 tcg_gen_qemu_ld_tl(tmp, addr, index, MO_TEUL); 949 gen_helper_extf32(tcg_env, fp, tmp); 950 break; 951 case OS_DOUBLE: 952 tcg_gen_qemu_ld_i64(t64, addr, index, MO_TEUQ); 953 gen_helper_extf64(tcg_env, fp, t64); 954 break; 955 case OS_EXTENDED: 956 if (m68k_feature(s->env, M68K_FEATURE_CF_FPU)) { 957 gen_exception(s, s->base.pc_next, EXCP_FP_UNIMP); 958 break; 959 } 960 tcg_gen_qemu_ld_i32(tmp, addr, index, MO_TEUL); 961 tcg_gen_shri_i32(tmp, tmp, 16); 962 tcg_gen_st16_i32(tmp, fp, offsetof(FPReg, l.upper)); 963 tcg_gen_addi_i32(tmp, addr, 4); 964 tcg_gen_qemu_ld_i64(t64, tmp, index, MO_TEUQ); 965 tcg_gen_st_i64(t64, fp, offsetof(FPReg, l.lower)); 966 break; 967 case OS_PACKED: 968 /* 969 * unimplemented data type on 68040/ColdFire 970 * FIXME if needed for another FPU 971 */ 972 gen_exception(s, s->base.pc_next, EXCP_FP_UNIMP); 973 break; 974 default: 975 g_assert_not_reached(); 976 } 977 } 978 979 static void gen_store_fp(DisasContext *s, int opsize, TCGv addr, TCGv_ptr fp, 980 int index) 981 { 982 TCGv tmp; 983 TCGv_i64 t64; 984 985 t64 = tcg_temp_new_i64(); 986 tmp = tcg_temp_new(); 987 switch (opsize) { 988 case OS_BYTE: 989 case OS_WORD: 990 case OS_LONG: 991 gen_helper_reds32(tmp, tcg_env, fp); 992 tcg_gen_qemu_st_tl(tmp, addr, index, opsize | MO_TE); 993 break; 994 case OS_SINGLE: 995 gen_helper_redf32(tmp, tcg_env, fp); 996 tcg_gen_qemu_st_tl(tmp, addr, index, MO_TEUL); 997 break; 998 case OS_DOUBLE: 999 gen_helper_redf64(t64, tcg_env, fp); 1000 tcg_gen_qemu_st_i64(t64, addr, index, MO_TEUQ); 1001 break; 1002 case OS_EXTENDED: 1003 if (m68k_feature(s->env, M68K_FEATURE_CF_FPU)) { 1004 gen_exception(s, s->base.pc_next, EXCP_FP_UNIMP); 1005 break; 1006 } 1007 tcg_gen_ld16u_i32(tmp, fp, offsetof(FPReg, l.upper)); 1008 tcg_gen_shli_i32(tmp, tmp, 16); 1009 tcg_gen_qemu_st_i32(tmp, addr, index, MO_TEUL); 1010 tcg_gen_addi_i32(tmp, addr, 4); 1011 tcg_gen_ld_i64(t64, fp, offsetof(FPReg, l.lower)); 1012 tcg_gen_qemu_st_i64(t64, tmp, index, MO_TEUQ); 1013 break; 1014 case OS_PACKED: 1015 /* 1016 * unimplemented data type on 68040/ColdFire 1017 * FIXME if needed for another FPU 1018 */ 1019 gen_exception(s, s->base.pc_next, EXCP_FP_UNIMP); 1020 break; 1021 default: 1022 g_assert_not_reached(); 1023 } 1024 } 1025 1026 static void gen_ldst_fp(DisasContext *s, int opsize, TCGv addr, 1027 TCGv_ptr fp, ea_what what, int index) 1028 { 1029 if (what == EA_STORE) { 1030 gen_store_fp(s, opsize, addr, fp, index); 1031 } else { 1032 gen_load_fp(s, opsize, addr, fp, index); 1033 } 1034 } 1035 1036 static int gen_ea_mode_fp(CPUM68KState *env, DisasContext *s, int mode, 1037 int reg0, int opsize, TCGv_ptr fp, ea_what what, 1038 int index) 1039 { 1040 TCGv reg, addr, tmp; 1041 TCGv_i64 t64; 1042 1043 switch (mode) { 1044 case 0: /* Data register direct. */ 1045 reg = cpu_dregs[reg0]; 1046 if (what == EA_STORE) { 1047 switch (opsize) { 1048 case OS_BYTE: 1049 case OS_WORD: 1050 case OS_LONG: 1051 gen_helper_reds32(reg, tcg_env, fp); 1052 break; 1053 case OS_SINGLE: 1054 gen_helper_redf32(reg, tcg_env, fp); 1055 break; 1056 default: 1057 g_assert_not_reached(); 1058 } 1059 } else { 1060 tmp = tcg_temp_new(); 1061 switch (opsize) { 1062 case OS_BYTE: 1063 case OS_WORD: 1064 case OS_LONG: 1065 tcg_gen_ext_i32(tmp, reg, opsize | MO_SIGN); 1066 gen_helper_exts32(tcg_env, fp, tmp); 1067 break; 1068 case OS_SINGLE: 1069 gen_helper_extf32(tcg_env, fp, reg); 1070 break; 1071 default: 1072 g_assert_not_reached(); 1073 } 1074 } 1075 return 0; 1076 case 1: /* Address register direct. */ 1077 return -1; 1078 case 2: /* Indirect register */ 1079 addr = get_areg(s, reg0); 1080 gen_ldst_fp(s, opsize, addr, fp, what, index); 1081 return 0; 1082 case 3: /* Indirect postincrement. */ 1083 addr = cpu_aregs[reg0]; 1084 gen_ldst_fp(s, opsize, addr, fp, what, index); 1085 tcg_gen_addi_i32(addr, addr, opsize_bytes(opsize)); 1086 return 0; 1087 case 4: /* Indirect predecrememnt. */ 1088 addr = gen_lea_mode(env, s, mode, reg0, opsize); 1089 if (IS_NULL_QREG(addr)) { 1090 return -1; 1091 } 1092 gen_ldst_fp(s, opsize, addr, fp, what, index); 1093 tcg_gen_mov_i32(cpu_aregs[reg0], addr); 1094 return 0; 1095 case 5: /* Indirect displacement. */ 1096 case 6: /* Indirect index + displacement. */ 1097 do_indirect: 1098 addr = gen_lea_mode(env, s, mode, reg0, opsize); 1099 if (IS_NULL_QREG(addr)) { 1100 return -1; 1101 } 1102 gen_ldst_fp(s, opsize, addr, fp, what, index); 1103 return 0; 1104 case 7: /* Other */ 1105 switch (reg0) { 1106 case 0: /* Absolute short. */ 1107 case 1: /* Absolute long. */ 1108 case 2: /* pc displacement */ 1109 case 3: /* pc index+displacement. */ 1110 goto do_indirect; 1111 case 4: /* Immediate. */ 1112 if (what == EA_STORE) { 1113 return -1; 1114 } 1115 switch (opsize) { 1116 case OS_BYTE: 1117 tmp = tcg_constant_i32((int8_t)read_im8(env, s)); 1118 gen_helper_exts32(tcg_env, fp, tmp); 1119 break; 1120 case OS_WORD: 1121 tmp = tcg_constant_i32((int16_t)read_im16(env, s)); 1122 gen_helper_exts32(tcg_env, fp, tmp); 1123 break; 1124 case OS_LONG: 1125 tmp = tcg_constant_i32(read_im32(env, s)); 1126 gen_helper_exts32(tcg_env, fp, tmp); 1127 break; 1128 case OS_SINGLE: 1129 tmp = tcg_constant_i32(read_im32(env, s)); 1130 gen_helper_extf32(tcg_env, fp, tmp); 1131 break; 1132 case OS_DOUBLE: 1133 t64 = tcg_constant_i64(read_im64(env, s)); 1134 gen_helper_extf64(tcg_env, fp, t64); 1135 break; 1136 case OS_EXTENDED: 1137 if (m68k_feature(s->env, M68K_FEATURE_CF_FPU)) { 1138 gen_exception(s, s->base.pc_next, EXCP_FP_UNIMP); 1139 break; 1140 } 1141 tmp = tcg_constant_i32(read_im32(env, s) >> 16); 1142 tcg_gen_st16_i32(tmp, fp, offsetof(FPReg, l.upper)); 1143 t64 = tcg_constant_i64(read_im64(env, s)); 1144 tcg_gen_st_i64(t64, fp, offsetof(FPReg, l.lower)); 1145 break; 1146 case OS_PACKED: 1147 /* 1148 * unimplemented data type on 68040/ColdFire 1149 * FIXME if needed for another FPU 1150 */ 1151 gen_exception(s, s->base.pc_next, EXCP_FP_UNIMP); 1152 break; 1153 default: 1154 g_assert_not_reached(); 1155 } 1156 return 0; 1157 default: 1158 return -1; 1159 } 1160 } 1161 return -1; 1162 } 1163 1164 static int gen_ea_fp(CPUM68KState *env, DisasContext *s, uint16_t insn, 1165 int opsize, TCGv_ptr fp, ea_what what, int index) 1166 { 1167 int mode = extract32(insn, 3, 3); 1168 int reg0 = REG(insn, 0); 1169 return gen_ea_mode_fp(env, s, mode, reg0, opsize, fp, what, index); 1170 } 1171 1172 typedef struct { 1173 TCGCond tcond; 1174 TCGv v1; 1175 TCGv v2; 1176 } DisasCompare; 1177 1178 static void gen_cc_cond(DisasCompare *c, DisasContext *s, int cond) 1179 { 1180 TCGv tmp, tmp2; 1181 TCGCond tcond; 1182 CCOp op = s->cc_op; 1183 1184 /* The CC_OP_CMP form can handle most normal comparisons directly. */ 1185 if (op == CC_OP_CMPB || op == CC_OP_CMPW || op == CC_OP_CMPL) { 1186 c->v1 = QREG_CC_N; 1187 c->v2 = QREG_CC_V; 1188 switch (cond) { 1189 case 2: /* HI */ 1190 case 3: /* LS */ 1191 tcond = TCG_COND_LEU; 1192 goto done; 1193 case 4: /* CC */ 1194 case 5: /* CS */ 1195 tcond = TCG_COND_LTU; 1196 goto done; 1197 case 6: /* NE */ 1198 case 7: /* EQ */ 1199 tcond = TCG_COND_EQ; 1200 goto done; 1201 case 10: /* PL */ 1202 case 11: /* MI */ 1203 c->v2 = tcg_constant_i32(0); 1204 c->v1 = tmp = tcg_temp_new(); 1205 tcg_gen_sub_i32(tmp, QREG_CC_N, QREG_CC_V); 1206 gen_ext(tmp, tmp, op - CC_OP_CMPB, 1); 1207 /* fallthru */ 1208 case 12: /* GE */ 1209 case 13: /* LT */ 1210 tcond = TCG_COND_LT; 1211 goto done; 1212 case 14: /* GT */ 1213 case 15: /* LE */ 1214 tcond = TCG_COND_LE; 1215 goto done; 1216 } 1217 } 1218 1219 c->v2 = tcg_constant_i32(0); 1220 1221 switch (cond) { 1222 case 0: /* T */ 1223 case 1: /* F */ 1224 c->v1 = c->v2; 1225 tcond = TCG_COND_NEVER; 1226 goto done; 1227 case 14: /* GT (!(Z || (N ^ V))) */ 1228 case 15: /* LE (Z || (N ^ V)) */ 1229 /* 1230 * Logic operations clear V, which simplifies LE to (Z || N), 1231 * and since Z and N are co-located, this becomes a normal 1232 * comparison vs N. 1233 */ 1234 if (op == CC_OP_LOGIC) { 1235 c->v1 = QREG_CC_N; 1236 tcond = TCG_COND_LE; 1237 goto done; 1238 } 1239 break; 1240 case 12: /* GE (!(N ^ V)) */ 1241 case 13: /* LT (N ^ V) */ 1242 /* Logic operations clear V, which simplifies this to N. */ 1243 if (op != CC_OP_LOGIC) { 1244 break; 1245 } 1246 /* fallthru */ 1247 case 10: /* PL (!N) */ 1248 case 11: /* MI (N) */ 1249 /* Several cases represent N normally. */ 1250 if (op == CC_OP_ADDB || op == CC_OP_ADDW || op == CC_OP_ADDL || 1251 op == CC_OP_SUBB || op == CC_OP_SUBW || op == CC_OP_SUBL || 1252 op == CC_OP_LOGIC) { 1253 c->v1 = QREG_CC_N; 1254 tcond = TCG_COND_LT; 1255 goto done; 1256 } 1257 break; 1258 case 6: /* NE (!Z) */ 1259 case 7: /* EQ (Z) */ 1260 /* Some cases fold Z into N. */ 1261 if (op == CC_OP_ADDB || op == CC_OP_ADDW || op == CC_OP_ADDL || 1262 op == CC_OP_SUBB || op == CC_OP_SUBW || op == CC_OP_SUBL || 1263 op == CC_OP_LOGIC) { 1264 tcond = TCG_COND_EQ; 1265 c->v1 = QREG_CC_N; 1266 goto done; 1267 } 1268 break; 1269 case 4: /* CC (!C) */ 1270 case 5: /* CS (C) */ 1271 /* Some cases fold C into X. */ 1272 if (op == CC_OP_ADDB || op == CC_OP_ADDW || op == CC_OP_ADDL || 1273 op == CC_OP_SUBB || op == CC_OP_SUBW || op == CC_OP_SUBL) { 1274 tcond = TCG_COND_NE; 1275 c->v1 = QREG_CC_X; 1276 goto done; 1277 } 1278 /* fallthru */ 1279 case 8: /* VC (!V) */ 1280 case 9: /* VS (V) */ 1281 /* Logic operations clear V and C. */ 1282 if (op == CC_OP_LOGIC) { 1283 tcond = TCG_COND_NEVER; 1284 c->v1 = c->v2; 1285 goto done; 1286 } 1287 break; 1288 } 1289 1290 /* Otherwise, flush flag state to CC_OP_FLAGS. */ 1291 gen_flush_flags(s); 1292 1293 switch (cond) { 1294 case 0: /* T */ 1295 case 1: /* F */ 1296 default: 1297 /* Invalid, or handled above. */ 1298 abort(); 1299 case 2: /* HI (!C && !Z) -> !(C || Z)*/ 1300 case 3: /* LS (C || Z) */ 1301 c->v1 = tmp = tcg_temp_new(); 1302 tcg_gen_setcond_i32(TCG_COND_EQ, tmp, QREG_CC_Z, c->v2); 1303 tcg_gen_or_i32(tmp, tmp, QREG_CC_C); 1304 tcond = TCG_COND_NE; 1305 break; 1306 case 4: /* CC (!C) */ 1307 case 5: /* CS (C) */ 1308 c->v1 = QREG_CC_C; 1309 tcond = TCG_COND_NE; 1310 break; 1311 case 6: /* NE (!Z) */ 1312 case 7: /* EQ (Z) */ 1313 c->v1 = QREG_CC_Z; 1314 tcond = TCG_COND_EQ; 1315 break; 1316 case 8: /* VC (!V) */ 1317 case 9: /* VS (V) */ 1318 c->v1 = QREG_CC_V; 1319 tcond = TCG_COND_LT; 1320 break; 1321 case 10: /* PL (!N) */ 1322 case 11: /* MI (N) */ 1323 c->v1 = QREG_CC_N; 1324 tcond = TCG_COND_LT; 1325 break; 1326 case 12: /* GE (!(N ^ V)) */ 1327 case 13: /* LT (N ^ V) */ 1328 c->v1 = tmp = tcg_temp_new(); 1329 tcg_gen_xor_i32(tmp, QREG_CC_N, QREG_CC_V); 1330 tcond = TCG_COND_LT; 1331 break; 1332 case 14: /* GT (!(Z || (N ^ V))) */ 1333 case 15: /* LE (Z || (N ^ V)) */ 1334 c->v1 = tmp = tcg_temp_new(); 1335 tcg_gen_negsetcond_i32(TCG_COND_EQ, tmp, QREG_CC_Z, c->v2); 1336 tmp2 = tcg_temp_new(); 1337 tcg_gen_xor_i32(tmp2, QREG_CC_N, QREG_CC_V); 1338 tcg_gen_or_i32(tmp, tmp, tmp2); 1339 tcond = TCG_COND_LT; 1340 break; 1341 } 1342 1343 done: 1344 if ((cond & 1) == 0) { 1345 tcond = tcg_invert_cond(tcond); 1346 } 1347 c->tcond = tcond; 1348 } 1349 1350 static void gen_jmpcc(DisasContext *s, int cond, TCGLabel *l1) 1351 { 1352 DisasCompare c; 1353 1354 gen_cc_cond(&c, s, cond); 1355 update_cc_op(s); 1356 tcg_gen_brcond_i32(c.tcond, c.v1, c.v2, l1); 1357 } 1358 1359 /* Force a TB lookup after an instruction that changes the CPU state. */ 1360 static void gen_exit_tb(DisasContext *s) 1361 { 1362 update_cc_op(s); 1363 tcg_gen_movi_i32(QREG_PC, s->pc); 1364 s->base.is_jmp = DISAS_EXIT; 1365 } 1366 1367 #define SRC_EA(env, result, opsize, op_sign, addrp) do { \ 1368 result = gen_ea(env, s, insn, opsize, NULL_QREG, addrp, \ 1369 op_sign ? EA_LOADS : EA_LOADU, IS_USER(s)); \ 1370 if (IS_NULL_QREG(result)) { \ 1371 gen_addr_fault(s); \ 1372 return; \ 1373 } \ 1374 } while (0) 1375 1376 #define DEST_EA(env, insn, opsize, val, addrp) do { \ 1377 TCGv ea_result = gen_ea(env, s, insn, opsize, val, addrp, \ 1378 EA_STORE, IS_USER(s)); \ 1379 if (IS_NULL_QREG(ea_result)) { \ 1380 gen_addr_fault(s); \ 1381 return; \ 1382 } \ 1383 } while (0) 1384 1385 /* Generate a jump to an immediate address. */ 1386 static void gen_jmp_tb(DisasContext *s, int n, target_ulong dest, 1387 target_ulong src) 1388 { 1389 if (unlikely(s->ss_active)) { 1390 update_cc_op(s); 1391 tcg_gen_movi_i32(QREG_PC, dest); 1392 gen_raise_exception_format2(s, EXCP_TRACE, src); 1393 } else if (translator_use_goto_tb(&s->base, dest)) { 1394 tcg_gen_goto_tb(n); 1395 tcg_gen_movi_i32(QREG_PC, dest); 1396 tcg_gen_exit_tb(s->base.tb, n); 1397 } else { 1398 gen_jmp_im(s, dest); 1399 tcg_gen_exit_tb(NULL, 0); 1400 } 1401 s->base.is_jmp = DISAS_NORETURN; 1402 } 1403 1404 DISAS_INSN(scc) 1405 { 1406 DisasCompare c; 1407 int cond; 1408 TCGv tmp; 1409 1410 cond = (insn >> 8) & 0xf; 1411 gen_cc_cond(&c, s, cond); 1412 1413 tmp = tcg_temp_new(); 1414 tcg_gen_negsetcond_i32(c.tcond, tmp, c.v1, c.v2); 1415 1416 DEST_EA(env, insn, OS_BYTE, tmp, NULL); 1417 } 1418 1419 DISAS_INSN(dbcc) 1420 { 1421 TCGLabel *l1; 1422 TCGv reg; 1423 TCGv tmp; 1424 int16_t offset; 1425 uint32_t base; 1426 1427 reg = DREG(insn, 0); 1428 base = s->pc; 1429 offset = (int16_t)read_im16(env, s); 1430 l1 = gen_new_label(); 1431 gen_jmpcc(s, (insn >> 8) & 0xf, l1); 1432 1433 tmp = tcg_temp_new(); 1434 tcg_gen_ext16s_i32(tmp, reg); 1435 tcg_gen_addi_i32(tmp, tmp, -1); 1436 gen_partset_reg(OS_WORD, reg, tmp); 1437 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, -1, l1); 1438 gen_jmp_tb(s, 1, base + offset, s->base.pc_next); 1439 gen_set_label(l1); 1440 gen_jmp_tb(s, 0, s->pc, s->base.pc_next); 1441 } 1442 1443 DISAS_INSN(undef_mac) 1444 { 1445 gen_exception(s, s->base.pc_next, EXCP_LINEA); 1446 } 1447 1448 DISAS_INSN(undef_fpu) 1449 { 1450 gen_exception(s, s->base.pc_next, EXCP_LINEF); 1451 } 1452 1453 DISAS_INSN(undef) 1454 { 1455 /* 1456 * ??? This is both instructions that are as yet unimplemented 1457 * for the 680x0 series, as well as those that are implemented 1458 * but actually illegal for CPU32 or pre-68020. 1459 */ 1460 qemu_log_mask(LOG_UNIMP, "Illegal instruction: %04x @ %08x\n", 1461 insn, s->base.pc_next); 1462 gen_exception(s, s->base.pc_next, EXCP_ILLEGAL); 1463 } 1464 1465 DISAS_INSN(mulw) 1466 { 1467 TCGv reg; 1468 TCGv tmp; 1469 TCGv src; 1470 int sign; 1471 1472 sign = (insn & 0x100) != 0; 1473 reg = DREG(insn, 9); 1474 tmp = tcg_temp_new(); 1475 if (sign) 1476 tcg_gen_ext16s_i32(tmp, reg); 1477 else 1478 tcg_gen_ext16u_i32(tmp, reg); 1479 SRC_EA(env, src, OS_WORD, sign, NULL); 1480 tcg_gen_mul_i32(tmp, tmp, src); 1481 tcg_gen_mov_i32(reg, tmp); 1482 gen_logic_cc(s, tmp, OS_LONG); 1483 } 1484 1485 DISAS_INSN(divw) 1486 { 1487 int sign; 1488 TCGv src; 1489 TCGv destr; 1490 TCGv ilen; 1491 1492 /* divX.w <EA>,Dn 32/16 -> 16r:16q */ 1493 1494 sign = (insn & 0x100) != 0; 1495 1496 /* dest.l / src.w */ 1497 1498 SRC_EA(env, src, OS_WORD, sign, NULL); 1499 destr = tcg_constant_i32(REG(insn, 9)); 1500 ilen = tcg_constant_i32(s->pc - s->base.pc_next); 1501 if (sign) { 1502 gen_helper_divsw(tcg_env, destr, src, ilen); 1503 } else { 1504 gen_helper_divuw(tcg_env, destr, src, ilen); 1505 } 1506 1507 set_cc_op(s, CC_OP_FLAGS); 1508 } 1509 1510 DISAS_INSN(divl) 1511 { 1512 TCGv num, reg, den, ilen; 1513 int sign; 1514 uint16_t ext; 1515 1516 ext = read_im16(env, s); 1517 1518 sign = (ext & 0x0800) != 0; 1519 1520 if (ext & 0x400) { 1521 if (!m68k_feature(s->env, M68K_FEATURE_QUAD_MULDIV)) { 1522 gen_exception(s, s->base.pc_next, EXCP_ILLEGAL); 1523 return; 1524 } 1525 1526 /* divX.l <EA>, Dr:Dq 64/32 -> 32r:32q */ 1527 1528 SRC_EA(env, den, OS_LONG, 0, NULL); 1529 num = tcg_constant_i32(REG(ext, 12)); 1530 reg = tcg_constant_i32(REG(ext, 0)); 1531 ilen = tcg_constant_i32(s->pc - s->base.pc_next); 1532 if (sign) { 1533 gen_helper_divsll(tcg_env, num, reg, den, ilen); 1534 } else { 1535 gen_helper_divull(tcg_env, num, reg, den, ilen); 1536 } 1537 set_cc_op(s, CC_OP_FLAGS); 1538 return; 1539 } 1540 1541 /* divX.l <EA>, Dq 32/32 -> 32q */ 1542 /* divXl.l <EA>, Dr:Dq 32/32 -> 32r:32q */ 1543 1544 SRC_EA(env, den, OS_LONG, 0, NULL); 1545 num = tcg_constant_i32(REG(ext, 12)); 1546 reg = tcg_constant_i32(REG(ext, 0)); 1547 ilen = tcg_constant_i32(s->pc - s->base.pc_next); 1548 if (sign) { 1549 gen_helper_divsl(tcg_env, num, reg, den, ilen); 1550 } else { 1551 gen_helper_divul(tcg_env, num, reg, den, ilen); 1552 } 1553 1554 set_cc_op(s, CC_OP_FLAGS); 1555 } 1556 1557 static void bcd_add(TCGv dest, TCGv src) 1558 { 1559 TCGv t0, t1; 1560 1561 /* 1562 * dest10 = dest10 + src10 + X 1563 * 1564 * t1 = src 1565 * t2 = t1 + 0x066 1566 * t3 = t2 + dest + X 1567 * t4 = t2 ^ dest 1568 * t5 = t3 ^ t4 1569 * t6 = ~t5 & 0x110 1570 * t7 = (t6 >> 2) | (t6 >> 3) 1571 * return t3 - t7 1572 */ 1573 1574 /* 1575 * t1 = (src + 0x066) + dest + X 1576 * = result with some possible exceeding 0x6 1577 */ 1578 1579 t0 = tcg_temp_new(); 1580 tcg_gen_addi_i32(t0, src, 0x066); 1581 1582 t1 = tcg_temp_new(); 1583 tcg_gen_add_i32(t1, t0, dest); 1584 tcg_gen_add_i32(t1, t1, QREG_CC_X); 1585 1586 /* we will remove exceeding 0x6 where there is no carry */ 1587 1588 /* 1589 * t0 = (src + 0x0066) ^ dest 1590 * = t1 without carries 1591 */ 1592 1593 tcg_gen_xor_i32(t0, t0, dest); 1594 1595 /* 1596 * extract the carries 1597 * t0 = t0 ^ t1 1598 * = only the carries 1599 */ 1600 1601 tcg_gen_xor_i32(t0, t0, t1); 1602 1603 /* 1604 * generate 0x1 where there is no carry 1605 * and for each 0x10, generate a 0x6 1606 */ 1607 1608 tcg_gen_shri_i32(t0, t0, 3); 1609 tcg_gen_not_i32(t0, t0); 1610 tcg_gen_andi_i32(t0, t0, 0x22); 1611 tcg_gen_add_i32(dest, t0, t0); 1612 tcg_gen_add_i32(dest, dest, t0); 1613 1614 /* 1615 * remove the exceeding 0x6 1616 * for digits that have not generated a carry 1617 */ 1618 1619 tcg_gen_sub_i32(dest, t1, dest); 1620 } 1621 1622 static void bcd_sub(TCGv dest, TCGv src) 1623 { 1624 TCGv t0, t1, t2; 1625 1626 /* 1627 * dest10 = dest10 - src10 - X 1628 * = bcd_add(dest + 1 - X, 0x199 - src) 1629 */ 1630 1631 /* t0 = 0x066 + (0x199 - src) */ 1632 1633 t0 = tcg_temp_new(); 1634 tcg_gen_subfi_i32(t0, 0x1ff, src); 1635 1636 /* t1 = t0 + dest + 1 - X*/ 1637 1638 t1 = tcg_temp_new(); 1639 tcg_gen_add_i32(t1, t0, dest); 1640 tcg_gen_addi_i32(t1, t1, 1); 1641 tcg_gen_sub_i32(t1, t1, QREG_CC_X); 1642 1643 /* t2 = t0 ^ dest */ 1644 1645 t2 = tcg_temp_new(); 1646 tcg_gen_xor_i32(t2, t0, dest); 1647 1648 /* t0 = t1 ^ t2 */ 1649 1650 tcg_gen_xor_i32(t0, t1, t2); 1651 1652 /* 1653 * t2 = ~t0 & 0x110 1654 * t0 = (t2 >> 2) | (t2 >> 3) 1655 * 1656 * to fit on 8bit operands, changed in: 1657 * 1658 * t2 = ~(t0 >> 3) & 0x22 1659 * t0 = t2 + t2 1660 * t0 = t0 + t2 1661 */ 1662 1663 tcg_gen_shri_i32(t2, t0, 3); 1664 tcg_gen_not_i32(t2, t2); 1665 tcg_gen_andi_i32(t2, t2, 0x22); 1666 tcg_gen_add_i32(t0, t2, t2); 1667 tcg_gen_add_i32(t0, t0, t2); 1668 1669 /* return t1 - t0 */ 1670 1671 tcg_gen_sub_i32(dest, t1, t0); 1672 } 1673 1674 static void bcd_flags(TCGv val) 1675 { 1676 tcg_gen_andi_i32(QREG_CC_C, val, 0x0ff); 1677 tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_C); 1678 1679 tcg_gen_extract_i32(QREG_CC_C, val, 8, 1); 1680 1681 tcg_gen_mov_i32(QREG_CC_X, QREG_CC_C); 1682 } 1683 1684 DISAS_INSN(abcd_reg) 1685 { 1686 TCGv src; 1687 TCGv dest; 1688 1689 gen_flush_flags(s); /* !Z is sticky */ 1690 1691 src = gen_extend(s, DREG(insn, 0), OS_BYTE, 0); 1692 dest = gen_extend(s, DREG(insn, 9), OS_BYTE, 0); 1693 bcd_add(dest, src); 1694 gen_partset_reg(OS_BYTE, DREG(insn, 9), dest); 1695 1696 bcd_flags(dest); 1697 } 1698 1699 DISAS_INSN(abcd_mem) 1700 { 1701 TCGv src, dest, addr; 1702 1703 gen_flush_flags(s); /* !Z is sticky */ 1704 1705 /* Indirect pre-decrement load (mode 4) */ 1706 1707 src = gen_ea_mode(env, s, 4, REG(insn, 0), OS_BYTE, 1708 NULL_QREG, NULL, EA_LOADU, IS_USER(s)); 1709 dest = gen_ea_mode(env, s, 4, REG(insn, 9), OS_BYTE, 1710 NULL_QREG, &addr, EA_LOADU, IS_USER(s)); 1711 1712 bcd_add(dest, src); 1713 1714 gen_ea_mode(env, s, 4, REG(insn, 9), OS_BYTE, dest, &addr, 1715 EA_STORE, IS_USER(s)); 1716 1717 bcd_flags(dest); 1718 } 1719 1720 DISAS_INSN(sbcd_reg) 1721 { 1722 TCGv src, dest; 1723 1724 gen_flush_flags(s); /* !Z is sticky */ 1725 1726 src = gen_extend(s, DREG(insn, 0), OS_BYTE, 0); 1727 dest = gen_extend(s, DREG(insn, 9), OS_BYTE, 0); 1728 1729 bcd_sub(dest, src); 1730 1731 gen_partset_reg(OS_BYTE, DREG(insn, 9), dest); 1732 1733 bcd_flags(dest); 1734 } 1735 1736 DISAS_INSN(sbcd_mem) 1737 { 1738 TCGv src, dest, addr; 1739 1740 gen_flush_flags(s); /* !Z is sticky */ 1741 1742 /* Indirect pre-decrement load (mode 4) */ 1743 1744 src = gen_ea_mode(env, s, 4, REG(insn, 0), OS_BYTE, 1745 NULL_QREG, NULL, EA_LOADU, IS_USER(s)); 1746 dest = gen_ea_mode(env, s, 4, REG(insn, 9), OS_BYTE, 1747 NULL_QREG, &addr, EA_LOADU, IS_USER(s)); 1748 1749 bcd_sub(dest, src); 1750 1751 gen_ea_mode(env, s, 4, REG(insn, 9), OS_BYTE, dest, &addr, 1752 EA_STORE, IS_USER(s)); 1753 1754 bcd_flags(dest); 1755 } 1756 1757 DISAS_INSN(nbcd) 1758 { 1759 TCGv src, dest; 1760 TCGv addr; 1761 1762 gen_flush_flags(s); /* !Z is sticky */ 1763 1764 SRC_EA(env, src, OS_BYTE, 0, &addr); 1765 1766 dest = tcg_temp_new(); 1767 tcg_gen_movi_i32(dest, 0); 1768 bcd_sub(dest, src); 1769 1770 DEST_EA(env, insn, OS_BYTE, dest, &addr); 1771 1772 bcd_flags(dest); 1773 } 1774 1775 DISAS_INSN(addsub) 1776 { 1777 TCGv reg; 1778 TCGv dest; 1779 TCGv src; 1780 TCGv tmp; 1781 TCGv addr; 1782 int add; 1783 int opsize; 1784 1785 add = (insn & 0x4000) != 0; 1786 opsize = insn_opsize(insn); 1787 reg = gen_extend(s, DREG(insn, 9), opsize, 1); 1788 dest = tcg_temp_new(); 1789 if (insn & 0x100) { 1790 SRC_EA(env, tmp, opsize, 1, &addr); 1791 src = reg; 1792 } else { 1793 tmp = reg; 1794 SRC_EA(env, src, opsize, 1, NULL); 1795 } 1796 if (add) { 1797 tcg_gen_add_i32(dest, tmp, src); 1798 tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, src); 1799 set_cc_op(s, CC_OP_ADDB + opsize); 1800 } else { 1801 tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, tmp, src); 1802 tcg_gen_sub_i32(dest, tmp, src); 1803 set_cc_op(s, CC_OP_SUBB + opsize); 1804 } 1805 gen_update_cc_add(dest, src, opsize); 1806 if (insn & 0x100) { 1807 DEST_EA(env, insn, opsize, dest, &addr); 1808 } else { 1809 gen_partset_reg(opsize, DREG(insn, 9), dest); 1810 } 1811 } 1812 1813 /* Reverse the order of the bits in REG. */ 1814 DISAS_INSN(bitrev) 1815 { 1816 TCGv reg; 1817 reg = DREG(insn, 0); 1818 gen_helper_bitrev(reg, reg); 1819 } 1820 1821 DISAS_INSN(bitop_reg) 1822 { 1823 int opsize; 1824 int op; 1825 TCGv src1; 1826 TCGv src2; 1827 TCGv tmp; 1828 TCGv addr; 1829 TCGv dest; 1830 1831 if ((insn & 0x38) != 0) 1832 opsize = OS_BYTE; 1833 else 1834 opsize = OS_LONG; 1835 op = (insn >> 6) & 3; 1836 SRC_EA(env, src1, opsize, 0, op ? &addr: NULL); 1837 1838 gen_flush_flags(s); 1839 src2 = tcg_temp_new(); 1840 if (opsize == OS_BYTE) 1841 tcg_gen_andi_i32(src2, DREG(insn, 9), 7); 1842 else 1843 tcg_gen_andi_i32(src2, DREG(insn, 9), 31); 1844 1845 tmp = tcg_temp_new(); 1846 tcg_gen_shl_i32(tmp, tcg_constant_i32(1), src2); 1847 1848 tcg_gen_and_i32(QREG_CC_Z, src1, tmp); 1849 1850 dest = tcg_temp_new(); 1851 switch (op) { 1852 case 1: /* bchg */ 1853 tcg_gen_xor_i32(dest, src1, tmp); 1854 break; 1855 case 2: /* bclr */ 1856 tcg_gen_andc_i32(dest, src1, tmp); 1857 break; 1858 case 3: /* bset */ 1859 tcg_gen_or_i32(dest, src1, tmp); 1860 break; 1861 default: /* btst */ 1862 break; 1863 } 1864 if (op) { 1865 DEST_EA(env, insn, opsize, dest, &addr); 1866 } 1867 } 1868 1869 DISAS_INSN(sats) 1870 { 1871 TCGv reg; 1872 reg = DREG(insn, 0); 1873 gen_flush_flags(s); 1874 gen_helper_sats(reg, reg, QREG_CC_V); 1875 gen_logic_cc(s, reg, OS_LONG); 1876 } 1877 1878 static void gen_push(DisasContext *s, TCGv val) 1879 { 1880 TCGv tmp; 1881 1882 tmp = tcg_temp_new(); 1883 tcg_gen_subi_i32(tmp, QREG_SP, 4); 1884 gen_store(s, OS_LONG, tmp, val, IS_USER(s)); 1885 tcg_gen_mov_i32(QREG_SP, tmp); 1886 } 1887 1888 static TCGv mreg(int reg) 1889 { 1890 if (reg < 8) { 1891 /* Dx */ 1892 return cpu_dregs[reg]; 1893 } 1894 /* Ax */ 1895 return cpu_aregs[reg & 7]; 1896 } 1897 1898 DISAS_INSN(movem) 1899 { 1900 TCGv addr, incr, tmp, r[16]; 1901 int is_load = (insn & 0x0400) != 0; 1902 int opsize = (insn & 0x40) != 0 ? OS_LONG : OS_WORD; 1903 uint16_t mask = read_im16(env, s); 1904 int mode = extract32(insn, 3, 3); 1905 int reg0 = REG(insn, 0); 1906 int i; 1907 1908 tmp = cpu_aregs[reg0]; 1909 1910 switch (mode) { 1911 case 0: /* data register direct */ 1912 case 1: /* addr register direct */ 1913 do_addr_fault: 1914 gen_addr_fault(s); 1915 return; 1916 1917 case 2: /* indirect */ 1918 break; 1919 1920 case 3: /* indirect post-increment */ 1921 if (!is_load) { 1922 /* post-increment is not allowed */ 1923 goto do_addr_fault; 1924 } 1925 break; 1926 1927 case 4: /* indirect pre-decrement */ 1928 if (is_load) { 1929 /* pre-decrement is not allowed */ 1930 goto do_addr_fault; 1931 } 1932 /* 1933 * We want a bare copy of the address reg, without any pre-decrement 1934 * adjustment, as gen_lea would provide. 1935 */ 1936 break; 1937 1938 default: 1939 tmp = gen_lea_mode(env, s, mode, reg0, opsize); 1940 if (IS_NULL_QREG(tmp)) { 1941 goto do_addr_fault; 1942 } 1943 break; 1944 } 1945 1946 addr = tcg_temp_new(); 1947 tcg_gen_mov_i32(addr, tmp); 1948 incr = tcg_constant_i32(opsize_bytes(opsize)); 1949 1950 if (is_load) { 1951 /* memory to register */ 1952 for (i = 0; i < 16; i++) { 1953 if (mask & (1 << i)) { 1954 r[i] = gen_load(s, opsize, addr, 1, IS_USER(s)); 1955 tcg_gen_add_i32(addr, addr, incr); 1956 } 1957 } 1958 for (i = 0; i < 16; i++) { 1959 if (mask & (1 << i)) { 1960 tcg_gen_mov_i32(mreg(i), r[i]); 1961 } 1962 } 1963 if (mode == 3) { 1964 /* post-increment: movem (An)+,X */ 1965 tcg_gen_mov_i32(cpu_aregs[reg0], addr); 1966 } 1967 } else { 1968 /* register to memory */ 1969 if (mode == 4) { 1970 /* pre-decrement: movem X,-(An) */ 1971 for (i = 15; i >= 0; i--) { 1972 if ((mask << i) & 0x8000) { 1973 tcg_gen_sub_i32(addr, addr, incr); 1974 if (reg0 + 8 == i && 1975 m68k_feature(s->env, M68K_FEATURE_EXT_FULL)) { 1976 /* 1977 * M68020+: if the addressing register is the 1978 * register moved to memory, the value written 1979 * is the initial value decremented by the size of 1980 * the operation, regardless of how many actual 1981 * stores have been performed until this point. 1982 * M68000/M68010: the value is the initial value. 1983 */ 1984 tmp = tcg_temp_new(); 1985 tcg_gen_sub_i32(tmp, cpu_aregs[reg0], incr); 1986 gen_store(s, opsize, addr, tmp, IS_USER(s)); 1987 } else { 1988 gen_store(s, opsize, addr, mreg(i), IS_USER(s)); 1989 } 1990 } 1991 } 1992 tcg_gen_mov_i32(cpu_aregs[reg0], addr); 1993 } else { 1994 for (i = 0; i < 16; i++) { 1995 if (mask & (1 << i)) { 1996 gen_store(s, opsize, addr, mreg(i), IS_USER(s)); 1997 tcg_gen_add_i32(addr, addr, incr); 1998 } 1999 } 2000 } 2001 } 2002 } 2003 2004 DISAS_INSN(movep) 2005 { 2006 uint8_t i; 2007 int16_t displ; 2008 TCGv reg; 2009 TCGv addr; 2010 TCGv abuf; 2011 TCGv dbuf; 2012 2013 displ = read_im16(env, s); 2014 2015 addr = AREG(insn, 0); 2016 reg = DREG(insn, 9); 2017 2018 abuf = tcg_temp_new(); 2019 tcg_gen_addi_i32(abuf, addr, displ); 2020 dbuf = tcg_temp_new(); 2021 2022 if (insn & 0x40) { 2023 i = 4; 2024 } else { 2025 i = 2; 2026 } 2027 2028 if (insn & 0x80) { 2029 for ( ; i > 0 ; i--) { 2030 tcg_gen_shri_i32(dbuf, reg, (i - 1) * 8); 2031 tcg_gen_qemu_st_i32(dbuf, abuf, IS_USER(s), MO_UB); 2032 if (i > 1) { 2033 tcg_gen_addi_i32(abuf, abuf, 2); 2034 } 2035 } 2036 } else { 2037 for ( ; i > 0 ; i--) { 2038 tcg_gen_qemu_ld_tl(dbuf, abuf, IS_USER(s), MO_UB); 2039 tcg_gen_deposit_i32(reg, reg, dbuf, (i - 1) * 8, 8); 2040 if (i > 1) { 2041 tcg_gen_addi_i32(abuf, abuf, 2); 2042 } 2043 } 2044 } 2045 } 2046 2047 DISAS_INSN(bitop_im) 2048 { 2049 int opsize; 2050 int op; 2051 TCGv src1; 2052 uint32_t mask; 2053 int bitnum; 2054 TCGv tmp; 2055 TCGv addr; 2056 2057 if ((insn & 0x38) != 0) 2058 opsize = OS_BYTE; 2059 else 2060 opsize = OS_LONG; 2061 op = (insn >> 6) & 3; 2062 2063 bitnum = read_im16(env, s); 2064 if (m68k_feature(s->env, M68K_FEATURE_M68K)) { 2065 if (bitnum & 0xfe00) { 2066 disas_undef(env, s, insn); 2067 return; 2068 } 2069 } else { 2070 if (bitnum & 0xff00) { 2071 disas_undef(env, s, insn); 2072 return; 2073 } 2074 } 2075 2076 SRC_EA(env, src1, opsize, 0, op ? &addr: NULL); 2077 2078 gen_flush_flags(s); 2079 if (opsize == OS_BYTE) 2080 bitnum &= 7; 2081 else 2082 bitnum &= 31; 2083 mask = 1 << bitnum; 2084 2085 tcg_gen_andi_i32(QREG_CC_Z, src1, mask); 2086 2087 if (op) { 2088 tmp = tcg_temp_new(); 2089 switch (op) { 2090 case 1: /* bchg */ 2091 tcg_gen_xori_i32(tmp, src1, mask); 2092 break; 2093 case 2: /* bclr */ 2094 tcg_gen_andi_i32(tmp, src1, ~mask); 2095 break; 2096 case 3: /* bset */ 2097 tcg_gen_ori_i32(tmp, src1, mask); 2098 break; 2099 default: /* btst */ 2100 break; 2101 } 2102 DEST_EA(env, insn, opsize, tmp, &addr); 2103 } 2104 } 2105 2106 static TCGv gen_get_ccr(DisasContext *s) 2107 { 2108 TCGv dest; 2109 2110 update_cc_op(s); 2111 dest = tcg_temp_new(); 2112 gen_helper_get_ccr(dest, tcg_env); 2113 return dest; 2114 } 2115 2116 static TCGv gen_get_sr(DisasContext *s) 2117 { 2118 TCGv ccr; 2119 TCGv sr; 2120 2121 ccr = gen_get_ccr(s); 2122 sr = tcg_temp_new(); 2123 tcg_gen_andi_i32(sr, QREG_SR, 0xffe0); 2124 tcg_gen_or_i32(sr, sr, ccr); 2125 return sr; 2126 } 2127 2128 static void gen_set_sr_im(DisasContext *s, uint16_t val, int ccr_only) 2129 { 2130 if (ccr_only) { 2131 tcg_gen_movi_i32(QREG_CC_C, val & CCF_C ? 1 : 0); 2132 tcg_gen_movi_i32(QREG_CC_V, val & CCF_V ? -1 : 0); 2133 tcg_gen_movi_i32(QREG_CC_Z, val & CCF_Z ? 0 : 1); 2134 tcg_gen_movi_i32(QREG_CC_N, val & CCF_N ? -1 : 0); 2135 tcg_gen_movi_i32(QREG_CC_X, val & CCF_X ? 1 : 0); 2136 } else { 2137 /* Must writeback before changing security state. */ 2138 do_writebacks(s); 2139 gen_helper_set_sr(tcg_env, tcg_constant_i32(val)); 2140 } 2141 set_cc_op(s, CC_OP_FLAGS); 2142 } 2143 2144 static void gen_set_sr(DisasContext *s, TCGv val, int ccr_only) 2145 { 2146 if (ccr_only) { 2147 gen_helper_set_ccr(tcg_env, val); 2148 } else { 2149 /* Must writeback before changing security state. */ 2150 do_writebacks(s); 2151 gen_helper_set_sr(tcg_env, val); 2152 } 2153 set_cc_op(s, CC_OP_FLAGS); 2154 } 2155 2156 static void gen_move_to_sr(CPUM68KState *env, DisasContext *s, uint16_t insn, 2157 bool ccr_only) 2158 { 2159 if ((insn & 0x3f) == 0x3c) { 2160 uint16_t val; 2161 val = read_im16(env, s); 2162 gen_set_sr_im(s, val, ccr_only); 2163 } else { 2164 TCGv src; 2165 SRC_EA(env, src, OS_WORD, 0, NULL); 2166 gen_set_sr(s, src, ccr_only); 2167 } 2168 } 2169 2170 DISAS_INSN(arith_im) 2171 { 2172 int op; 2173 TCGv im; 2174 TCGv src1; 2175 TCGv dest; 2176 TCGv addr; 2177 int opsize; 2178 bool with_SR = ((insn & 0x3f) == 0x3c); 2179 2180 op = (insn >> 9) & 7; 2181 opsize = insn_opsize(insn); 2182 switch (opsize) { 2183 case OS_BYTE: 2184 im = tcg_constant_i32((int8_t)read_im8(env, s)); 2185 break; 2186 case OS_WORD: 2187 im = tcg_constant_i32((int16_t)read_im16(env, s)); 2188 break; 2189 case OS_LONG: 2190 im = tcg_constant_i32(read_im32(env, s)); 2191 break; 2192 default: 2193 g_assert_not_reached(); 2194 } 2195 2196 if (with_SR) { 2197 /* SR/CCR can only be used with andi/eori/ori */ 2198 if (op == 2 || op == 3 || op == 6) { 2199 disas_undef(env, s, insn); 2200 return; 2201 } 2202 switch (opsize) { 2203 case OS_BYTE: 2204 src1 = gen_get_ccr(s); 2205 break; 2206 case OS_WORD: 2207 if (IS_USER(s)) { 2208 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE); 2209 return; 2210 } 2211 src1 = gen_get_sr(s); 2212 break; 2213 default: 2214 /* OS_LONG; others already g_assert_not_reached. */ 2215 disas_undef(env, s, insn); 2216 return; 2217 } 2218 } else { 2219 SRC_EA(env, src1, opsize, 1, (op == 6) ? NULL : &addr); 2220 } 2221 dest = tcg_temp_new(); 2222 switch (op) { 2223 case 0: /* ori */ 2224 tcg_gen_or_i32(dest, src1, im); 2225 if (with_SR) { 2226 gen_set_sr(s, dest, opsize == OS_BYTE); 2227 gen_exit_tb(s); 2228 } else { 2229 DEST_EA(env, insn, opsize, dest, &addr); 2230 gen_logic_cc(s, dest, opsize); 2231 } 2232 break; 2233 case 1: /* andi */ 2234 tcg_gen_and_i32(dest, src1, im); 2235 if (with_SR) { 2236 gen_set_sr(s, dest, opsize == OS_BYTE); 2237 gen_exit_tb(s); 2238 } else { 2239 DEST_EA(env, insn, opsize, dest, &addr); 2240 gen_logic_cc(s, dest, opsize); 2241 } 2242 break; 2243 case 2: /* subi */ 2244 tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, src1, im); 2245 tcg_gen_sub_i32(dest, src1, im); 2246 gen_update_cc_add(dest, im, opsize); 2247 set_cc_op(s, CC_OP_SUBB + opsize); 2248 DEST_EA(env, insn, opsize, dest, &addr); 2249 break; 2250 case 3: /* addi */ 2251 tcg_gen_add_i32(dest, src1, im); 2252 gen_update_cc_add(dest, im, opsize); 2253 tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, im); 2254 set_cc_op(s, CC_OP_ADDB + opsize); 2255 DEST_EA(env, insn, opsize, dest, &addr); 2256 break; 2257 case 5: /* eori */ 2258 tcg_gen_xor_i32(dest, src1, im); 2259 if (with_SR) { 2260 gen_set_sr(s, dest, opsize == OS_BYTE); 2261 gen_exit_tb(s); 2262 } else { 2263 DEST_EA(env, insn, opsize, dest, &addr); 2264 gen_logic_cc(s, dest, opsize); 2265 } 2266 break; 2267 case 6: /* cmpi */ 2268 gen_update_cc_cmp(s, src1, im, opsize); 2269 break; 2270 default: 2271 abort(); 2272 } 2273 } 2274 2275 DISAS_INSN(cas) 2276 { 2277 int opsize; 2278 TCGv addr; 2279 uint16_t ext; 2280 TCGv load; 2281 TCGv cmp; 2282 MemOp opc; 2283 2284 switch ((insn >> 9) & 3) { 2285 case 1: 2286 opsize = OS_BYTE; 2287 opc = MO_SB; 2288 break; 2289 case 2: 2290 opsize = OS_WORD; 2291 opc = MO_TESW; 2292 break; 2293 case 3: 2294 opsize = OS_LONG; 2295 opc = MO_TESL; 2296 break; 2297 default: 2298 g_assert_not_reached(); 2299 } 2300 2301 ext = read_im16(env, s); 2302 2303 /* cas Dc,Du,<EA> */ 2304 2305 addr = gen_lea(env, s, insn, opsize); 2306 if (IS_NULL_QREG(addr)) { 2307 gen_addr_fault(s); 2308 return; 2309 } 2310 2311 cmp = gen_extend(s, DREG(ext, 0), opsize, 1); 2312 2313 /* 2314 * if <EA> == Dc then 2315 * <EA> = Du 2316 * Dc = <EA> (because <EA> == Dc) 2317 * else 2318 * Dc = <EA> 2319 */ 2320 2321 load = tcg_temp_new(); 2322 tcg_gen_atomic_cmpxchg_i32(load, addr, cmp, DREG(ext, 6), 2323 IS_USER(s), opc); 2324 /* update flags before setting cmp to load */ 2325 gen_update_cc_cmp(s, load, cmp, opsize); 2326 gen_partset_reg(opsize, DREG(ext, 0), load); 2327 2328 switch (extract32(insn, 3, 3)) { 2329 case 3: /* Indirect postincrement. */ 2330 tcg_gen_addi_i32(AREG(insn, 0), addr, opsize_bytes(opsize)); 2331 break; 2332 case 4: /* Indirect predecrememnt. */ 2333 tcg_gen_mov_i32(AREG(insn, 0), addr); 2334 break; 2335 } 2336 } 2337 2338 DISAS_INSN(cas2w) 2339 { 2340 uint16_t ext1, ext2; 2341 TCGv addr1, addr2; 2342 2343 /* cas2 Dc1:Dc2,Du1:Du2,(Rn1):(Rn2) */ 2344 2345 ext1 = read_im16(env, s); 2346 2347 if (ext1 & 0x8000) { 2348 /* Address Register */ 2349 addr1 = AREG(ext1, 12); 2350 } else { 2351 /* Data Register */ 2352 addr1 = DREG(ext1, 12); 2353 } 2354 2355 ext2 = read_im16(env, s); 2356 if (ext2 & 0x8000) { 2357 /* Address Register */ 2358 addr2 = AREG(ext2, 12); 2359 } else { 2360 /* Data Register */ 2361 addr2 = DREG(ext2, 12); 2362 } 2363 2364 /* 2365 * if (R1) == Dc1 && (R2) == Dc2 then 2366 * (R1) = Du1 2367 * (R2) = Du2 2368 * else 2369 * Dc1 = (R1) 2370 * Dc2 = (R2) 2371 */ 2372 2373 if (tb_cflags(s->base.tb) & CF_PARALLEL) { 2374 gen_helper_exit_atomic(tcg_env); 2375 } else { 2376 TCGv regs = tcg_constant_i32(REG(ext2, 6) | 2377 (REG(ext1, 6) << 3) | 2378 (REG(ext2, 0) << 6) | 2379 (REG(ext1, 0) << 9)); 2380 gen_helper_cas2w(tcg_env, regs, addr1, addr2); 2381 } 2382 2383 /* Note that cas2w also assigned to env->cc_op. */ 2384 s->cc_op = CC_OP_CMPW; 2385 s->cc_op_synced = 1; 2386 } 2387 2388 DISAS_INSN(cas2l) 2389 { 2390 uint16_t ext1, ext2; 2391 TCGv addr1, addr2, regs; 2392 2393 /* cas2 Dc1:Dc2,Du1:Du2,(Rn1):(Rn2) */ 2394 2395 ext1 = read_im16(env, s); 2396 2397 if (ext1 & 0x8000) { 2398 /* Address Register */ 2399 addr1 = AREG(ext1, 12); 2400 } else { 2401 /* Data Register */ 2402 addr1 = DREG(ext1, 12); 2403 } 2404 2405 ext2 = read_im16(env, s); 2406 if (ext2 & 0x8000) { 2407 /* Address Register */ 2408 addr2 = AREG(ext2, 12); 2409 } else { 2410 /* Data Register */ 2411 addr2 = DREG(ext2, 12); 2412 } 2413 2414 /* 2415 * if (R1) == Dc1 && (R2) == Dc2 then 2416 * (R1) = Du1 2417 * (R2) = Du2 2418 * else 2419 * Dc1 = (R1) 2420 * Dc2 = (R2) 2421 */ 2422 2423 regs = tcg_constant_i32(REG(ext2, 6) | 2424 (REG(ext1, 6) << 3) | 2425 (REG(ext2, 0) << 6) | 2426 (REG(ext1, 0) << 9)); 2427 if (tb_cflags(s->base.tb) & CF_PARALLEL) { 2428 gen_helper_cas2l_parallel(tcg_env, regs, addr1, addr2); 2429 } else { 2430 gen_helper_cas2l(tcg_env, regs, addr1, addr2); 2431 } 2432 2433 /* Note that cas2l also assigned to env->cc_op. */ 2434 s->cc_op = CC_OP_CMPL; 2435 s->cc_op_synced = 1; 2436 } 2437 2438 DISAS_INSN(byterev) 2439 { 2440 TCGv reg; 2441 2442 reg = DREG(insn, 0); 2443 tcg_gen_bswap32_i32(reg, reg); 2444 } 2445 2446 DISAS_INSN(move) 2447 { 2448 TCGv src; 2449 TCGv dest; 2450 int op; 2451 int opsize; 2452 2453 switch (insn >> 12) { 2454 case 1: /* move.b */ 2455 opsize = OS_BYTE; 2456 break; 2457 case 2: /* move.l */ 2458 opsize = OS_LONG; 2459 break; 2460 case 3: /* move.w */ 2461 opsize = OS_WORD; 2462 break; 2463 default: 2464 abort(); 2465 } 2466 SRC_EA(env, src, opsize, 1, NULL); 2467 op = (insn >> 6) & 7; 2468 if (op == 1) { 2469 /* movea */ 2470 /* The value will already have been sign extended. */ 2471 dest = AREG(insn, 9); 2472 tcg_gen_mov_i32(dest, src); 2473 } else { 2474 /* normal move */ 2475 uint16_t dest_ea; 2476 dest_ea = ((insn >> 9) & 7) | (op << 3); 2477 DEST_EA(env, dest_ea, opsize, src, NULL); 2478 /* This will be correct because loads sign extend. */ 2479 gen_logic_cc(s, src, opsize); 2480 } 2481 } 2482 2483 DISAS_INSN(negx) 2484 { 2485 TCGv z; 2486 TCGv src; 2487 TCGv addr; 2488 int opsize; 2489 2490 opsize = insn_opsize(insn); 2491 SRC_EA(env, src, opsize, 1, &addr); 2492 2493 gen_flush_flags(s); /* compute old Z */ 2494 2495 /* 2496 * Perform subtract with borrow. 2497 * (X, N) = -(src + X); 2498 */ 2499 2500 z = tcg_constant_i32(0); 2501 tcg_gen_add2_i32(QREG_CC_N, QREG_CC_X, src, z, QREG_CC_X, z); 2502 tcg_gen_sub2_i32(QREG_CC_N, QREG_CC_X, z, z, QREG_CC_N, QREG_CC_X); 2503 gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1); 2504 2505 tcg_gen_andi_i32(QREG_CC_X, QREG_CC_X, 1); 2506 2507 /* 2508 * Compute signed-overflow for negation. The normal formula for 2509 * subtraction is (res ^ src) & (src ^ dest), but with dest==0 2510 * this simplifies to res & src. 2511 */ 2512 2513 tcg_gen_and_i32(QREG_CC_V, QREG_CC_N, src); 2514 2515 /* Copy the rest of the results into place. */ 2516 tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_N); /* !Z is sticky */ 2517 tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X); 2518 2519 set_cc_op(s, CC_OP_FLAGS); 2520 2521 /* result is in QREG_CC_N */ 2522 2523 DEST_EA(env, insn, opsize, QREG_CC_N, &addr); 2524 } 2525 2526 DISAS_INSN(lea) 2527 { 2528 TCGv reg; 2529 TCGv tmp; 2530 2531 reg = AREG(insn, 9); 2532 tmp = gen_lea(env, s, insn, OS_LONG); 2533 if (IS_NULL_QREG(tmp)) { 2534 gen_addr_fault(s); 2535 return; 2536 } 2537 tcg_gen_mov_i32(reg, tmp); 2538 } 2539 2540 DISAS_INSN(clr) 2541 { 2542 int opsize; 2543 TCGv zero; 2544 2545 zero = tcg_constant_i32(0); 2546 opsize = insn_opsize(insn); 2547 DEST_EA(env, insn, opsize, zero, NULL); 2548 gen_logic_cc(s, zero, opsize); 2549 } 2550 2551 DISAS_INSN(move_from_ccr) 2552 { 2553 TCGv ccr; 2554 2555 ccr = gen_get_ccr(s); 2556 DEST_EA(env, insn, OS_WORD, ccr, NULL); 2557 } 2558 2559 DISAS_INSN(neg) 2560 { 2561 TCGv src1; 2562 TCGv dest; 2563 TCGv addr; 2564 int opsize; 2565 2566 opsize = insn_opsize(insn); 2567 SRC_EA(env, src1, opsize, 1, &addr); 2568 dest = tcg_temp_new(); 2569 tcg_gen_neg_i32(dest, src1); 2570 set_cc_op(s, CC_OP_SUBB + opsize); 2571 gen_update_cc_add(dest, src1, opsize); 2572 tcg_gen_setcondi_i32(TCG_COND_NE, QREG_CC_X, dest, 0); 2573 DEST_EA(env, insn, opsize, dest, &addr); 2574 } 2575 2576 DISAS_INSN(move_to_ccr) 2577 { 2578 gen_move_to_sr(env, s, insn, true); 2579 } 2580 2581 DISAS_INSN(not) 2582 { 2583 TCGv src1; 2584 TCGv dest; 2585 TCGv addr; 2586 int opsize; 2587 2588 opsize = insn_opsize(insn); 2589 SRC_EA(env, src1, opsize, 1, &addr); 2590 dest = tcg_temp_new(); 2591 tcg_gen_not_i32(dest, src1); 2592 DEST_EA(env, insn, opsize, dest, &addr); 2593 gen_logic_cc(s, dest, opsize); 2594 } 2595 2596 DISAS_INSN(swap) 2597 { 2598 TCGv src1; 2599 TCGv src2; 2600 TCGv reg; 2601 2602 src1 = tcg_temp_new(); 2603 src2 = tcg_temp_new(); 2604 reg = DREG(insn, 0); 2605 tcg_gen_shli_i32(src1, reg, 16); 2606 tcg_gen_shri_i32(src2, reg, 16); 2607 tcg_gen_or_i32(reg, src1, src2); 2608 gen_logic_cc(s, reg, OS_LONG); 2609 } 2610 2611 DISAS_INSN(bkpt) 2612 { 2613 #if defined(CONFIG_USER_ONLY) 2614 gen_exception(s, s->base.pc_next, EXCP_DEBUG); 2615 #else 2616 gen_exception(s, s->base.pc_next, EXCP_ILLEGAL); 2617 #endif 2618 } 2619 2620 DISAS_INSN(pea) 2621 { 2622 TCGv tmp; 2623 2624 tmp = gen_lea(env, s, insn, OS_LONG); 2625 if (IS_NULL_QREG(tmp)) { 2626 gen_addr_fault(s); 2627 return; 2628 } 2629 gen_push(s, tmp); 2630 } 2631 2632 DISAS_INSN(ext) 2633 { 2634 int op; 2635 TCGv reg; 2636 TCGv tmp; 2637 2638 reg = DREG(insn, 0); 2639 op = (insn >> 6) & 7; 2640 tmp = tcg_temp_new(); 2641 if (op == 3) 2642 tcg_gen_ext16s_i32(tmp, reg); 2643 else 2644 tcg_gen_ext8s_i32(tmp, reg); 2645 if (op == 2) 2646 gen_partset_reg(OS_WORD, reg, tmp); 2647 else 2648 tcg_gen_mov_i32(reg, tmp); 2649 gen_logic_cc(s, tmp, OS_LONG); 2650 } 2651 2652 DISAS_INSN(tst) 2653 { 2654 int opsize; 2655 TCGv tmp; 2656 2657 opsize = insn_opsize(insn); 2658 SRC_EA(env, tmp, opsize, 1, NULL); 2659 gen_logic_cc(s, tmp, opsize); 2660 } 2661 2662 DISAS_INSN(pulse) 2663 { 2664 /* Implemented as a NOP. */ 2665 } 2666 2667 DISAS_INSN(illegal) 2668 { 2669 gen_exception(s, s->base.pc_next, EXCP_ILLEGAL); 2670 } 2671 2672 DISAS_INSN(tas) 2673 { 2674 int mode = extract32(insn, 3, 3); 2675 int reg0 = REG(insn, 0); 2676 2677 if (mode == 0) { 2678 /* data register direct */ 2679 TCGv dest = cpu_dregs[reg0]; 2680 gen_logic_cc(s, dest, OS_BYTE); 2681 tcg_gen_ori_tl(dest, dest, 0x80); 2682 } else { 2683 TCGv src1, addr; 2684 2685 addr = gen_lea_mode(env, s, mode, reg0, OS_BYTE); 2686 if (IS_NULL_QREG(addr)) { 2687 gen_addr_fault(s); 2688 return; 2689 } 2690 src1 = tcg_temp_new(); 2691 tcg_gen_atomic_fetch_or_tl(src1, addr, tcg_constant_tl(0x80), 2692 IS_USER(s), MO_SB); 2693 gen_logic_cc(s, src1, OS_BYTE); 2694 2695 switch (mode) { 2696 case 3: /* Indirect postincrement. */ 2697 tcg_gen_addi_i32(AREG(insn, 0), addr, 1); 2698 break; 2699 case 4: /* Indirect predecrememnt. */ 2700 tcg_gen_mov_i32(AREG(insn, 0), addr); 2701 break; 2702 } 2703 } 2704 } 2705 2706 DISAS_INSN(mull) 2707 { 2708 uint16_t ext; 2709 TCGv src1; 2710 int sign; 2711 2712 ext = read_im16(env, s); 2713 2714 sign = ext & 0x800; 2715 2716 if (ext & 0x400) { 2717 if (!m68k_feature(s->env, M68K_FEATURE_QUAD_MULDIV)) { 2718 gen_exception(s, s->base.pc_next, EXCP_ILLEGAL); 2719 return; 2720 } 2721 2722 SRC_EA(env, src1, OS_LONG, 0, NULL); 2723 2724 if (sign) { 2725 tcg_gen_muls2_i32(QREG_CC_Z, QREG_CC_N, src1, DREG(ext, 12)); 2726 } else { 2727 tcg_gen_mulu2_i32(QREG_CC_Z, QREG_CC_N, src1, DREG(ext, 12)); 2728 } 2729 /* if Dl == Dh, 68040 returns low word */ 2730 tcg_gen_mov_i32(DREG(ext, 0), QREG_CC_N); 2731 tcg_gen_mov_i32(DREG(ext, 12), QREG_CC_Z); 2732 tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_N); 2733 2734 tcg_gen_movi_i32(QREG_CC_V, 0); 2735 tcg_gen_movi_i32(QREG_CC_C, 0); 2736 2737 set_cc_op(s, CC_OP_FLAGS); 2738 return; 2739 } 2740 SRC_EA(env, src1, OS_LONG, 0, NULL); 2741 if (m68k_feature(s->env, M68K_FEATURE_M68K)) { 2742 tcg_gen_movi_i32(QREG_CC_C, 0); 2743 if (sign) { 2744 tcg_gen_muls2_i32(QREG_CC_N, QREG_CC_V, src1, DREG(ext, 12)); 2745 /* QREG_CC_V is -(QREG_CC_V != (QREG_CC_N >> 31)) */ 2746 tcg_gen_sari_i32(QREG_CC_Z, QREG_CC_N, 31); 2747 tcg_gen_negsetcond_i32(TCG_COND_NE, QREG_CC_V, 2748 QREG_CC_V, QREG_CC_Z); 2749 } else { 2750 tcg_gen_mulu2_i32(QREG_CC_N, QREG_CC_V, src1, DREG(ext, 12)); 2751 /* QREG_CC_V is -(QREG_CC_V != 0), use QREG_CC_C as 0 */ 2752 tcg_gen_negsetcond_i32(TCG_COND_NE, QREG_CC_V, 2753 QREG_CC_V, QREG_CC_C); 2754 } 2755 tcg_gen_mov_i32(DREG(ext, 12), QREG_CC_N); 2756 2757 tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N); 2758 2759 set_cc_op(s, CC_OP_FLAGS); 2760 } else { 2761 /* 2762 * The upper 32 bits of the product are discarded, so 2763 * muls.l and mulu.l are functionally equivalent. 2764 */ 2765 tcg_gen_mul_i32(DREG(ext, 12), src1, DREG(ext, 12)); 2766 gen_logic_cc(s, DREG(ext, 12), OS_LONG); 2767 } 2768 } 2769 2770 static void gen_link(DisasContext *s, uint16_t insn, int32_t offset) 2771 { 2772 TCGv reg; 2773 TCGv tmp; 2774 2775 reg = AREG(insn, 0); 2776 tmp = tcg_temp_new(); 2777 tcg_gen_subi_i32(tmp, QREG_SP, 4); 2778 gen_store(s, OS_LONG, tmp, reg, IS_USER(s)); 2779 if ((insn & 7) != 7) { 2780 tcg_gen_mov_i32(reg, tmp); 2781 } 2782 tcg_gen_addi_i32(QREG_SP, tmp, offset); 2783 } 2784 2785 DISAS_INSN(link) 2786 { 2787 int16_t offset; 2788 2789 offset = read_im16(env, s); 2790 gen_link(s, insn, offset); 2791 } 2792 2793 DISAS_INSN(linkl) 2794 { 2795 int32_t offset; 2796 2797 offset = read_im32(env, s); 2798 gen_link(s, insn, offset); 2799 } 2800 2801 DISAS_INSN(unlk) 2802 { 2803 TCGv src; 2804 TCGv reg; 2805 TCGv tmp; 2806 2807 src = tcg_temp_new(); 2808 reg = AREG(insn, 0); 2809 tcg_gen_mov_i32(src, reg); 2810 tmp = gen_load(s, OS_LONG, src, 0, IS_USER(s)); 2811 tcg_gen_mov_i32(reg, tmp); 2812 tcg_gen_addi_i32(QREG_SP, src, 4); 2813 } 2814 2815 #if !defined(CONFIG_USER_ONLY) 2816 DISAS_INSN(reset) 2817 { 2818 if (IS_USER(s)) { 2819 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE); 2820 return; 2821 } 2822 2823 gen_helper_reset(tcg_env); 2824 } 2825 #endif 2826 2827 DISAS_INSN(nop) 2828 { 2829 } 2830 2831 DISAS_INSN(rtd) 2832 { 2833 TCGv tmp; 2834 int16_t offset = read_im16(env, s); 2835 2836 tmp = gen_load(s, OS_LONG, QREG_SP, 0, IS_USER(s)); 2837 tcg_gen_addi_i32(QREG_SP, QREG_SP, offset + 4); 2838 gen_jmp(s, tmp); 2839 } 2840 2841 DISAS_INSN(rtr) 2842 { 2843 TCGv tmp; 2844 TCGv ccr; 2845 TCGv sp; 2846 2847 sp = tcg_temp_new(); 2848 ccr = gen_load(s, OS_WORD, QREG_SP, 0, IS_USER(s)); 2849 tcg_gen_addi_i32(sp, QREG_SP, 2); 2850 tmp = gen_load(s, OS_LONG, sp, 0, IS_USER(s)); 2851 tcg_gen_addi_i32(QREG_SP, sp, 4); 2852 2853 gen_set_sr(s, ccr, true); 2854 2855 gen_jmp(s, tmp); 2856 } 2857 2858 DISAS_INSN(rts) 2859 { 2860 TCGv tmp; 2861 2862 tmp = gen_load(s, OS_LONG, QREG_SP, 0, IS_USER(s)); 2863 tcg_gen_addi_i32(QREG_SP, QREG_SP, 4); 2864 gen_jmp(s, tmp); 2865 } 2866 2867 DISAS_INSN(jump) 2868 { 2869 TCGv tmp; 2870 2871 /* 2872 * Load the target address first to ensure correct exception 2873 * behavior. 2874 */ 2875 tmp = gen_lea(env, s, insn, OS_LONG); 2876 if (IS_NULL_QREG(tmp)) { 2877 gen_addr_fault(s); 2878 return; 2879 } 2880 if ((insn & 0x40) == 0) { 2881 /* jsr */ 2882 gen_push(s, tcg_constant_i32(s->pc)); 2883 } 2884 gen_jmp(s, tmp); 2885 } 2886 2887 DISAS_INSN(addsubq) 2888 { 2889 TCGv src; 2890 TCGv dest; 2891 TCGv val; 2892 int imm; 2893 TCGv addr; 2894 int opsize; 2895 2896 if ((insn & 070) == 010) { 2897 /* Operation on address register is always long. */ 2898 opsize = OS_LONG; 2899 } else { 2900 opsize = insn_opsize(insn); 2901 } 2902 SRC_EA(env, src, opsize, 1, &addr); 2903 imm = (insn >> 9) & 7; 2904 if (imm == 0) { 2905 imm = 8; 2906 } 2907 val = tcg_constant_i32(imm); 2908 dest = tcg_temp_new(); 2909 tcg_gen_mov_i32(dest, src); 2910 if ((insn & 0x38) == 0x08) { 2911 /* 2912 * Don't update condition codes if the destination is an 2913 * address register. 2914 */ 2915 if (insn & 0x0100) { 2916 tcg_gen_sub_i32(dest, dest, val); 2917 } else { 2918 tcg_gen_add_i32(dest, dest, val); 2919 } 2920 } else { 2921 if (insn & 0x0100) { 2922 tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, val); 2923 tcg_gen_sub_i32(dest, dest, val); 2924 set_cc_op(s, CC_OP_SUBB + opsize); 2925 } else { 2926 tcg_gen_add_i32(dest, dest, val); 2927 tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, val); 2928 set_cc_op(s, CC_OP_ADDB + opsize); 2929 } 2930 gen_update_cc_add(dest, val, opsize); 2931 } 2932 DEST_EA(env, insn, opsize, dest, &addr); 2933 } 2934 2935 DISAS_INSN(branch) 2936 { 2937 int32_t offset; 2938 uint32_t base; 2939 int op; 2940 2941 base = s->pc; 2942 op = (insn >> 8) & 0xf; 2943 offset = (int8_t)insn; 2944 if (offset == 0) { 2945 offset = (int16_t)read_im16(env, s); 2946 } else if (offset == -1) { 2947 offset = read_im32(env, s); 2948 } 2949 if (op == 1) { 2950 /* bsr */ 2951 gen_push(s, tcg_constant_i32(s->pc)); 2952 } 2953 if (op > 1) { 2954 /* Bcc */ 2955 TCGLabel *l1 = gen_new_label(); 2956 gen_jmpcc(s, ((insn >> 8) & 0xf) ^ 1, l1); 2957 gen_jmp_tb(s, 1, base + offset, s->base.pc_next); 2958 gen_set_label(l1); 2959 gen_jmp_tb(s, 0, s->pc, s->base.pc_next); 2960 } else { 2961 /* Unconditional branch. */ 2962 update_cc_op(s); 2963 gen_jmp_tb(s, 0, base + offset, s->base.pc_next); 2964 } 2965 } 2966 2967 DISAS_INSN(moveq) 2968 { 2969 tcg_gen_movi_i32(DREG(insn, 9), (int8_t)insn); 2970 gen_logic_cc(s, DREG(insn, 9), OS_LONG); 2971 } 2972 2973 DISAS_INSN(mvzs) 2974 { 2975 int opsize; 2976 TCGv src; 2977 TCGv reg; 2978 2979 if (insn & 0x40) 2980 opsize = OS_WORD; 2981 else 2982 opsize = OS_BYTE; 2983 SRC_EA(env, src, opsize, (insn & 0x80) == 0, NULL); 2984 reg = DREG(insn, 9); 2985 tcg_gen_mov_i32(reg, src); 2986 gen_logic_cc(s, src, opsize); 2987 } 2988 2989 DISAS_INSN(or) 2990 { 2991 TCGv reg; 2992 TCGv dest; 2993 TCGv src; 2994 TCGv addr; 2995 int opsize; 2996 2997 opsize = insn_opsize(insn); 2998 reg = gen_extend(s, DREG(insn, 9), opsize, 0); 2999 dest = tcg_temp_new(); 3000 if (insn & 0x100) { 3001 SRC_EA(env, src, opsize, 0, &addr); 3002 tcg_gen_or_i32(dest, src, reg); 3003 DEST_EA(env, insn, opsize, dest, &addr); 3004 } else { 3005 SRC_EA(env, src, opsize, 0, NULL); 3006 tcg_gen_or_i32(dest, src, reg); 3007 gen_partset_reg(opsize, DREG(insn, 9), dest); 3008 } 3009 gen_logic_cc(s, dest, opsize); 3010 } 3011 3012 DISAS_INSN(suba) 3013 { 3014 TCGv src; 3015 TCGv reg; 3016 3017 SRC_EA(env, src, (insn & 0x100) ? OS_LONG : OS_WORD, 1, NULL); 3018 reg = AREG(insn, 9); 3019 tcg_gen_sub_i32(reg, reg, src); 3020 } 3021 3022 static inline void gen_subx(DisasContext *s, TCGv src, TCGv dest, int opsize) 3023 { 3024 TCGv tmp, zero; 3025 3026 gen_flush_flags(s); /* compute old Z */ 3027 3028 /* 3029 * Perform subtract with borrow. 3030 * (X, N) = dest - (src + X); 3031 */ 3032 3033 zero = tcg_constant_i32(0); 3034 tcg_gen_add2_i32(QREG_CC_N, QREG_CC_X, src, zero, QREG_CC_X, zero); 3035 tcg_gen_sub2_i32(QREG_CC_N, QREG_CC_X, dest, zero, QREG_CC_N, QREG_CC_X); 3036 gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1); 3037 tcg_gen_andi_i32(QREG_CC_X, QREG_CC_X, 1); 3038 3039 /* Compute signed-overflow for subtract. */ 3040 3041 tmp = tcg_temp_new(); 3042 tcg_gen_xor_i32(QREG_CC_V, QREG_CC_N, dest); 3043 tcg_gen_xor_i32(tmp, dest, src); 3044 tcg_gen_and_i32(QREG_CC_V, QREG_CC_V, tmp); 3045 3046 /* Copy the rest of the results into place. */ 3047 tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_N); /* !Z is sticky */ 3048 tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X); 3049 3050 set_cc_op(s, CC_OP_FLAGS); 3051 3052 /* result is in QREG_CC_N */ 3053 } 3054 3055 DISAS_INSN(subx_reg) 3056 { 3057 TCGv dest; 3058 TCGv src; 3059 int opsize; 3060 3061 opsize = insn_opsize(insn); 3062 3063 src = gen_extend(s, DREG(insn, 0), opsize, 1); 3064 dest = gen_extend(s, DREG(insn, 9), opsize, 1); 3065 3066 gen_subx(s, src, dest, opsize); 3067 3068 gen_partset_reg(opsize, DREG(insn, 9), QREG_CC_N); 3069 } 3070 3071 DISAS_INSN(subx_mem) 3072 { 3073 TCGv src; 3074 TCGv addr_src; 3075 TCGv dest; 3076 TCGv addr_dest; 3077 int opsize; 3078 3079 opsize = insn_opsize(insn); 3080 3081 addr_src = AREG(insn, 0); 3082 tcg_gen_subi_i32(addr_src, addr_src, opsize_bytes(opsize)); 3083 src = gen_load(s, opsize, addr_src, 1, IS_USER(s)); 3084 3085 addr_dest = AREG(insn, 9); 3086 tcg_gen_subi_i32(addr_dest, addr_dest, opsize_bytes(opsize)); 3087 dest = gen_load(s, opsize, addr_dest, 1, IS_USER(s)); 3088 3089 gen_subx(s, src, dest, opsize); 3090 3091 gen_store(s, opsize, addr_dest, QREG_CC_N, IS_USER(s)); 3092 } 3093 3094 DISAS_INSN(mov3q) 3095 { 3096 TCGv src; 3097 int val; 3098 3099 val = (insn >> 9) & 7; 3100 if (val == 0) { 3101 val = -1; 3102 } 3103 src = tcg_constant_i32(val); 3104 gen_logic_cc(s, src, OS_LONG); 3105 DEST_EA(env, insn, OS_LONG, src, NULL); 3106 } 3107 3108 DISAS_INSN(cmp) 3109 { 3110 TCGv src; 3111 TCGv reg; 3112 int opsize; 3113 3114 opsize = insn_opsize(insn); 3115 SRC_EA(env, src, opsize, 1, NULL); 3116 reg = gen_extend(s, DREG(insn, 9), opsize, 1); 3117 gen_update_cc_cmp(s, reg, src, opsize); 3118 } 3119 3120 DISAS_INSN(cmpa) 3121 { 3122 int opsize; 3123 TCGv src; 3124 TCGv reg; 3125 3126 if (insn & 0x100) { 3127 opsize = OS_LONG; 3128 } else { 3129 opsize = OS_WORD; 3130 } 3131 SRC_EA(env, src, opsize, 1, NULL); 3132 reg = AREG(insn, 9); 3133 gen_update_cc_cmp(s, reg, src, OS_LONG); 3134 } 3135 3136 DISAS_INSN(cmpm) 3137 { 3138 int opsize = insn_opsize(insn); 3139 TCGv src, dst; 3140 3141 /* Post-increment load (mode 3) from Ay. */ 3142 src = gen_ea_mode(env, s, 3, REG(insn, 0), opsize, 3143 NULL_QREG, NULL, EA_LOADS, IS_USER(s)); 3144 /* Post-increment load (mode 3) from Ax. */ 3145 dst = gen_ea_mode(env, s, 3, REG(insn, 9), opsize, 3146 NULL_QREG, NULL, EA_LOADS, IS_USER(s)); 3147 3148 gen_update_cc_cmp(s, dst, src, opsize); 3149 } 3150 3151 DISAS_INSN(eor) 3152 { 3153 TCGv src; 3154 TCGv dest; 3155 TCGv addr; 3156 int opsize; 3157 3158 opsize = insn_opsize(insn); 3159 3160 SRC_EA(env, src, opsize, 0, &addr); 3161 dest = tcg_temp_new(); 3162 tcg_gen_xor_i32(dest, src, DREG(insn, 9)); 3163 gen_logic_cc(s, dest, opsize); 3164 DEST_EA(env, insn, opsize, dest, &addr); 3165 } 3166 3167 static void do_exg(TCGv reg1, TCGv reg2) 3168 { 3169 TCGv temp = tcg_temp_new(); 3170 tcg_gen_mov_i32(temp, reg1); 3171 tcg_gen_mov_i32(reg1, reg2); 3172 tcg_gen_mov_i32(reg2, temp); 3173 } 3174 3175 DISAS_INSN(exg_dd) 3176 { 3177 /* exchange Dx and Dy */ 3178 do_exg(DREG(insn, 9), DREG(insn, 0)); 3179 } 3180 3181 DISAS_INSN(exg_aa) 3182 { 3183 /* exchange Ax and Ay */ 3184 do_exg(AREG(insn, 9), AREG(insn, 0)); 3185 } 3186 3187 DISAS_INSN(exg_da) 3188 { 3189 /* exchange Dx and Ay */ 3190 do_exg(DREG(insn, 9), AREG(insn, 0)); 3191 } 3192 3193 DISAS_INSN(and) 3194 { 3195 TCGv src; 3196 TCGv reg; 3197 TCGv dest; 3198 TCGv addr; 3199 int opsize; 3200 3201 dest = tcg_temp_new(); 3202 3203 opsize = insn_opsize(insn); 3204 reg = DREG(insn, 9); 3205 if (insn & 0x100) { 3206 SRC_EA(env, src, opsize, 0, &addr); 3207 tcg_gen_and_i32(dest, src, reg); 3208 DEST_EA(env, insn, opsize, dest, &addr); 3209 } else { 3210 SRC_EA(env, src, opsize, 0, NULL); 3211 tcg_gen_and_i32(dest, src, reg); 3212 gen_partset_reg(opsize, reg, dest); 3213 } 3214 gen_logic_cc(s, dest, opsize); 3215 } 3216 3217 DISAS_INSN(adda) 3218 { 3219 TCGv src; 3220 TCGv reg; 3221 3222 SRC_EA(env, src, (insn & 0x100) ? OS_LONG : OS_WORD, 1, NULL); 3223 reg = AREG(insn, 9); 3224 tcg_gen_add_i32(reg, reg, src); 3225 } 3226 3227 static inline void gen_addx(DisasContext *s, TCGv src, TCGv dest, int opsize) 3228 { 3229 TCGv tmp, zero; 3230 3231 gen_flush_flags(s); /* compute old Z */ 3232 3233 /* 3234 * Perform addition with carry. 3235 * (X, N) = src + dest + X; 3236 */ 3237 3238 zero = tcg_constant_i32(0); 3239 tcg_gen_add2_i32(QREG_CC_N, QREG_CC_X, QREG_CC_X, zero, dest, zero); 3240 tcg_gen_add2_i32(QREG_CC_N, QREG_CC_X, QREG_CC_N, QREG_CC_X, src, zero); 3241 gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1); 3242 3243 /* Compute signed-overflow for addition. */ 3244 3245 tmp = tcg_temp_new(); 3246 tcg_gen_xor_i32(QREG_CC_V, QREG_CC_N, src); 3247 tcg_gen_xor_i32(tmp, dest, src); 3248 tcg_gen_andc_i32(QREG_CC_V, QREG_CC_V, tmp); 3249 3250 /* Copy the rest of the results into place. */ 3251 tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_N); /* !Z is sticky */ 3252 tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X); 3253 3254 set_cc_op(s, CC_OP_FLAGS); 3255 3256 /* result is in QREG_CC_N */ 3257 } 3258 3259 DISAS_INSN(addx_reg) 3260 { 3261 TCGv dest; 3262 TCGv src; 3263 int opsize; 3264 3265 opsize = insn_opsize(insn); 3266 3267 dest = gen_extend(s, DREG(insn, 9), opsize, 1); 3268 src = gen_extend(s, DREG(insn, 0), opsize, 1); 3269 3270 gen_addx(s, src, dest, opsize); 3271 3272 gen_partset_reg(opsize, DREG(insn, 9), QREG_CC_N); 3273 } 3274 3275 DISAS_INSN(addx_mem) 3276 { 3277 TCGv src; 3278 TCGv addr_src; 3279 TCGv dest; 3280 TCGv addr_dest; 3281 int opsize; 3282 3283 opsize = insn_opsize(insn); 3284 3285 addr_src = AREG(insn, 0); 3286 tcg_gen_subi_i32(addr_src, addr_src, opsize_bytes(opsize)); 3287 src = gen_load(s, opsize, addr_src, 1, IS_USER(s)); 3288 3289 addr_dest = AREG(insn, 9); 3290 tcg_gen_subi_i32(addr_dest, addr_dest, opsize_bytes(opsize)); 3291 dest = gen_load(s, opsize, addr_dest, 1, IS_USER(s)); 3292 3293 gen_addx(s, src, dest, opsize); 3294 3295 gen_store(s, opsize, addr_dest, QREG_CC_N, IS_USER(s)); 3296 } 3297 3298 static inline void shift_im(DisasContext *s, uint16_t insn, int opsize) 3299 { 3300 int count = (insn >> 9) & 7; 3301 int logical = insn & 8; 3302 int left = insn & 0x100; 3303 int bits = opsize_bytes(opsize) * 8; 3304 TCGv reg = gen_extend(s, DREG(insn, 0), opsize, !logical); 3305 3306 if (count == 0) { 3307 count = 8; 3308 } 3309 3310 tcg_gen_movi_i32(QREG_CC_V, 0); 3311 if (left) { 3312 tcg_gen_shri_i32(QREG_CC_C, reg, bits - count); 3313 tcg_gen_shli_i32(QREG_CC_N, reg, count); 3314 3315 /* 3316 * Note that ColdFire always clears V (done above), 3317 * while M68000 sets if the most significant bit is changed at 3318 * any time during the shift operation. 3319 */ 3320 if (!logical && m68k_feature(s->env, M68K_FEATURE_M68K)) { 3321 /* if shift count >= bits, V is (reg != 0) */ 3322 if (count >= bits) { 3323 tcg_gen_negsetcond_i32(TCG_COND_NE, QREG_CC_V, reg, QREG_CC_V); 3324 } else { 3325 TCGv t0 = tcg_temp_new(); 3326 tcg_gen_sari_i32(QREG_CC_V, reg, bits - 1); 3327 tcg_gen_sari_i32(t0, reg, bits - count - 1); 3328 tcg_gen_negsetcond_i32(TCG_COND_NE, QREG_CC_V, QREG_CC_V, t0); 3329 } 3330 } 3331 } else { 3332 tcg_gen_shri_i32(QREG_CC_C, reg, count - 1); 3333 if (logical) { 3334 tcg_gen_shri_i32(QREG_CC_N, reg, count); 3335 } else { 3336 tcg_gen_sari_i32(QREG_CC_N, reg, count); 3337 } 3338 } 3339 3340 gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1); 3341 tcg_gen_andi_i32(QREG_CC_C, QREG_CC_C, 1); 3342 tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N); 3343 tcg_gen_mov_i32(QREG_CC_X, QREG_CC_C); 3344 3345 gen_partset_reg(opsize, DREG(insn, 0), QREG_CC_N); 3346 set_cc_op(s, CC_OP_FLAGS); 3347 } 3348 3349 static inline void shift_reg(DisasContext *s, uint16_t insn, int opsize) 3350 { 3351 int logical = insn & 8; 3352 int left = insn & 0x100; 3353 int bits = opsize_bytes(opsize) * 8; 3354 TCGv reg = gen_extend(s, DREG(insn, 0), opsize, !logical); 3355 TCGv s32; 3356 TCGv_i64 t64, s64; 3357 3358 t64 = tcg_temp_new_i64(); 3359 s64 = tcg_temp_new_i64(); 3360 s32 = tcg_temp_new(); 3361 3362 /* 3363 * Note that m68k truncates the shift count modulo 64, not 32. 3364 * In addition, a 64-bit shift makes it easy to find "the last 3365 * bit shifted out", for the carry flag. 3366 */ 3367 tcg_gen_andi_i32(s32, DREG(insn, 9), 63); 3368 tcg_gen_extu_i32_i64(s64, s32); 3369 tcg_gen_extu_i32_i64(t64, reg); 3370 3371 /* Optimistically set V=0. Also used as a zero source below. */ 3372 tcg_gen_movi_i32(QREG_CC_V, 0); 3373 if (left) { 3374 tcg_gen_shl_i64(t64, t64, s64); 3375 3376 if (opsize == OS_LONG) { 3377 tcg_gen_extr_i64_i32(QREG_CC_N, QREG_CC_C, t64); 3378 /* Note that C=0 if shift count is 0, and we get that for free. */ 3379 } else { 3380 TCGv zero = tcg_constant_i32(0); 3381 tcg_gen_extrl_i64_i32(QREG_CC_N, t64); 3382 tcg_gen_shri_i32(QREG_CC_C, QREG_CC_N, bits); 3383 tcg_gen_movcond_i32(TCG_COND_EQ, QREG_CC_C, 3384 s32, zero, zero, QREG_CC_C); 3385 } 3386 tcg_gen_andi_i32(QREG_CC_C, QREG_CC_C, 1); 3387 3388 /* X = C, but only if the shift count was non-zero. */ 3389 tcg_gen_movcond_i32(TCG_COND_NE, QREG_CC_X, s32, QREG_CC_V, 3390 QREG_CC_C, QREG_CC_X); 3391 3392 /* 3393 * M68000 sets V if the most significant bit is changed at 3394 * any time during the shift operation. Do this via creating 3395 * an extension of the sign bit, comparing, and discarding 3396 * the bits below the sign bit. I.e. 3397 * int64_t s = (intN_t)reg; 3398 * int64_t t = (int64_t)(intN_t)reg << count; 3399 * V = ((s ^ t) & (-1 << (bits - 1))) != 0 3400 */ 3401 if (!logical && m68k_feature(s->env, M68K_FEATURE_M68K)) { 3402 TCGv_i64 tt = tcg_constant_i64(32); 3403 /* if shift is greater than 32, use 32 */ 3404 tcg_gen_movcond_i64(TCG_COND_GT, s64, s64, tt, tt, s64); 3405 /* Sign extend the input to 64 bits; re-do the shift. */ 3406 tcg_gen_ext_i32_i64(t64, reg); 3407 tcg_gen_shl_i64(s64, t64, s64); 3408 /* Clear all bits that are unchanged. */ 3409 tcg_gen_xor_i64(t64, t64, s64); 3410 /* Ignore the bits below the sign bit. */ 3411 tcg_gen_andi_i64(t64, t64, -1ULL << (bits - 1)); 3412 /* If any bits remain set, we have overflow. */ 3413 tcg_gen_negsetcond_i64(TCG_COND_NE, t64, t64, tcg_constant_i64(0)); 3414 tcg_gen_extrl_i64_i32(QREG_CC_V, t64); 3415 } 3416 } else { 3417 tcg_gen_shli_i64(t64, t64, 32); 3418 if (logical) { 3419 tcg_gen_shr_i64(t64, t64, s64); 3420 } else { 3421 tcg_gen_sar_i64(t64, t64, s64); 3422 } 3423 tcg_gen_extr_i64_i32(QREG_CC_C, QREG_CC_N, t64); 3424 3425 /* Note that C=0 if shift count is 0, and we get that for free. */ 3426 tcg_gen_shri_i32(QREG_CC_C, QREG_CC_C, 31); 3427 3428 /* X = C, but only if the shift count was non-zero. */ 3429 tcg_gen_movcond_i32(TCG_COND_NE, QREG_CC_X, s32, QREG_CC_V, 3430 QREG_CC_C, QREG_CC_X); 3431 } 3432 gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1); 3433 tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N); 3434 3435 /* Write back the result. */ 3436 gen_partset_reg(opsize, DREG(insn, 0), QREG_CC_N); 3437 set_cc_op(s, CC_OP_FLAGS); 3438 } 3439 3440 DISAS_INSN(shift8_im) 3441 { 3442 shift_im(s, insn, OS_BYTE); 3443 } 3444 3445 DISAS_INSN(shift16_im) 3446 { 3447 shift_im(s, insn, OS_WORD); 3448 } 3449 3450 DISAS_INSN(shift_im) 3451 { 3452 shift_im(s, insn, OS_LONG); 3453 } 3454 3455 DISAS_INSN(shift8_reg) 3456 { 3457 shift_reg(s, insn, OS_BYTE); 3458 } 3459 3460 DISAS_INSN(shift16_reg) 3461 { 3462 shift_reg(s, insn, OS_WORD); 3463 } 3464 3465 DISAS_INSN(shift_reg) 3466 { 3467 shift_reg(s, insn, OS_LONG); 3468 } 3469 3470 DISAS_INSN(shift_mem) 3471 { 3472 int logical = insn & 8; 3473 int left = insn & 0x100; 3474 TCGv src; 3475 TCGv addr; 3476 3477 SRC_EA(env, src, OS_WORD, !logical, &addr); 3478 tcg_gen_movi_i32(QREG_CC_V, 0); 3479 if (left) { 3480 tcg_gen_shri_i32(QREG_CC_C, src, 15); 3481 tcg_gen_shli_i32(QREG_CC_N, src, 1); 3482 3483 /* 3484 * Note that ColdFire always clears V, 3485 * while M68000 sets if the most significant bit is changed at 3486 * any time during the shift operation 3487 */ 3488 if (!logical && m68k_feature(s->env, M68K_FEATURE_M68K)) { 3489 src = gen_extend(s, src, OS_WORD, 1); 3490 tcg_gen_xor_i32(QREG_CC_V, QREG_CC_N, src); 3491 } 3492 } else { 3493 tcg_gen_mov_i32(QREG_CC_C, src); 3494 if (logical) { 3495 tcg_gen_shri_i32(QREG_CC_N, src, 1); 3496 } else { 3497 tcg_gen_sari_i32(QREG_CC_N, src, 1); 3498 } 3499 } 3500 3501 gen_ext(QREG_CC_N, QREG_CC_N, OS_WORD, 1); 3502 tcg_gen_andi_i32(QREG_CC_C, QREG_CC_C, 1); 3503 tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N); 3504 tcg_gen_mov_i32(QREG_CC_X, QREG_CC_C); 3505 3506 DEST_EA(env, insn, OS_WORD, QREG_CC_N, &addr); 3507 set_cc_op(s, CC_OP_FLAGS); 3508 } 3509 3510 static void rotate(TCGv reg, TCGv shift, int left, int size) 3511 { 3512 switch (size) { 3513 case 8: 3514 /* Replicate the 8-bit input so that a 32-bit rotate works. */ 3515 tcg_gen_ext8u_i32(reg, reg); 3516 tcg_gen_muli_i32(reg, reg, 0x01010101); 3517 goto do_long; 3518 case 16: 3519 /* Replicate the 16-bit input so that a 32-bit rotate works. */ 3520 tcg_gen_deposit_i32(reg, reg, reg, 16, 16); 3521 goto do_long; 3522 do_long: 3523 default: 3524 if (left) { 3525 tcg_gen_rotl_i32(reg, reg, shift); 3526 } else { 3527 tcg_gen_rotr_i32(reg, reg, shift); 3528 } 3529 } 3530 3531 /* compute flags */ 3532 3533 switch (size) { 3534 case 8: 3535 tcg_gen_ext8s_i32(reg, reg); 3536 break; 3537 case 16: 3538 tcg_gen_ext16s_i32(reg, reg); 3539 break; 3540 default: 3541 break; 3542 } 3543 3544 /* QREG_CC_X is not affected */ 3545 3546 tcg_gen_mov_i32(QREG_CC_N, reg); 3547 tcg_gen_mov_i32(QREG_CC_Z, reg); 3548 3549 if (left) { 3550 tcg_gen_andi_i32(QREG_CC_C, reg, 1); 3551 } else { 3552 tcg_gen_shri_i32(QREG_CC_C, reg, 31); 3553 } 3554 3555 tcg_gen_movi_i32(QREG_CC_V, 0); /* always cleared */ 3556 } 3557 3558 static void rotate_x_flags(TCGv reg, TCGv X, int size) 3559 { 3560 switch (size) { 3561 case 8: 3562 tcg_gen_ext8s_i32(reg, reg); 3563 break; 3564 case 16: 3565 tcg_gen_ext16s_i32(reg, reg); 3566 break; 3567 default: 3568 break; 3569 } 3570 tcg_gen_mov_i32(QREG_CC_N, reg); 3571 tcg_gen_mov_i32(QREG_CC_Z, reg); 3572 tcg_gen_mov_i32(QREG_CC_X, X); 3573 tcg_gen_mov_i32(QREG_CC_C, X); 3574 tcg_gen_movi_i32(QREG_CC_V, 0); 3575 } 3576 3577 /* Result of rotate_x() is valid if 0 <= shift <= size */ 3578 static TCGv rotate_x(TCGv reg, TCGv shift, int left, int size) 3579 { 3580 TCGv X, shl, shr, shx, sz, zero; 3581 3582 sz = tcg_constant_i32(size); 3583 3584 shr = tcg_temp_new(); 3585 shl = tcg_temp_new(); 3586 shx = tcg_temp_new(); 3587 if (left) { 3588 tcg_gen_mov_i32(shl, shift); /* shl = shift */ 3589 tcg_gen_movi_i32(shr, size + 1); 3590 tcg_gen_sub_i32(shr, shr, shift); /* shr = size + 1 - shift */ 3591 tcg_gen_subi_i32(shx, shift, 1); /* shx = shift - 1 */ 3592 /* shx = shx < 0 ? size : shx; */ 3593 zero = tcg_constant_i32(0); 3594 tcg_gen_movcond_i32(TCG_COND_LT, shx, shx, zero, sz, shx); 3595 } else { 3596 tcg_gen_mov_i32(shr, shift); /* shr = shift */ 3597 tcg_gen_movi_i32(shl, size + 1); 3598 tcg_gen_sub_i32(shl, shl, shift); /* shl = size + 1 - shift */ 3599 tcg_gen_sub_i32(shx, sz, shift); /* shx = size - shift */ 3600 } 3601 3602 /* reg = (reg << shl) | (reg >> shr) | (x << shx); */ 3603 3604 tcg_gen_shl_i32(shl, reg, shl); 3605 tcg_gen_shr_i32(shr, reg, shr); 3606 tcg_gen_or_i32(reg, shl, shr); 3607 tcg_gen_shl_i32(shx, QREG_CC_X, shx); 3608 tcg_gen_or_i32(reg, reg, shx); 3609 3610 /* X = (reg >> size) & 1 */ 3611 3612 X = tcg_temp_new(); 3613 tcg_gen_extract_i32(X, reg, size, 1); 3614 3615 return X; 3616 } 3617 3618 /* Result of rotate32_x() is valid if 0 <= shift < 33 */ 3619 static TCGv rotate32_x(TCGv reg, TCGv shift, int left) 3620 { 3621 TCGv_i64 t0, shift64; 3622 TCGv X, lo, hi, zero; 3623 3624 shift64 = tcg_temp_new_i64(); 3625 tcg_gen_extu_i32_i64(shift64, shift); 3626 3627 t0 = tcg_temp_new_i64(); 3628 3629 X = tcg_temp_new(); 3630 lo = tcg_temp_new(); 3631 hi = tcg_temp_new(); 3632 3633 if (left) { 3634 /* create [reg:X:..] */ 3635 3636 tcg_gen_shli_i32(lo, QREG_CC_X, 31); 3637 tcg_gen_concat_i32_i64(t0, lo, reg); 3638 3639 /* rotate */ 3640 3641 tcg_gen_rotl_i64(t0, t0, shift64); 3642 3643 /* result is [reg:..:reg:X] */ 3644 3645 tcg_gen_extr_i64_i32(lo, hi, t0); 3646 tcg_gen_andi_i32(X, lo, 1); 3647 3648 tcg_gen_shri_i32(lo, lo, 1); 3649 } else { 3650 /* create [..:X:reg] */ 3651 3652 tcg_gen_concat_i32_i64(t0, reg, QREG_CC_X); 3653 3654 tcg_gen_rotr_i64(t0, t0, shift64); 3655 3656 /* result is value: [X:reg:..:reg] */ 3657 3658 tcg_gen_extr_i64_i32(lo, hi, t0); 3659 3660 /* extract X */ 3661 3662 tcg_gen_shri_i32(X, hi, 31); 3663 3664 /* extract result */ 3665 3666 tcg_gen_shli_i32(hi, hi, 1); 3667 } 3668 tcg_gen_or_i32(lo, lo, hi); 3669 3670 /* if shift == 0, register and X are not affected */ 3671 3672 zero = tcg_constant_i32(0); 3673 tcg_gen_movcond_i32(TCG_COND_EQ, X, shift, zero, QREG_CC_X, X); 3674 tcg_gen_movcond_i32(TCG_COND_EQ, reg, shift, zero, reg, lo); 3675 3676 return X; 3677 } 3678 3679 DISAS_INSN(rotate_im) 3680 { 3681 TCGv shift; 3682 int tmp; 3683 int left = (insn & 0x100); 3684 3685 tmp = (insn >> 9) & 7; 3686 if (tmp == 0) { 3687 tmp = 8; 3688 } 3689 3690 shift = tcg_constant_i32(tmp); 3691 if (insn & 8) { 3692 rotate(DREG(insn, 0), shift, left, 32); 3693 } else { 3694 TCGv X = rotate32_x(DREG(insn, 0), shift, left); 3695 rotate_x_flags(DREG(insn, 0), X, 32); 3696 } 3697 3698 set_cc_op(s, CC_OP_FLAGS); 3699 } 3700 3701 DISAS_INSN(rotate8_im) 3702 { 3703 int left = (insn & 0x100); 3704 TCGv reg; 3705 TCGv shift; 3706 int tmp; 3707 3708 reg = gen_extend(s, DREG(insn, 0), OS_BYTE, 0); 3709 3710 tmp = (insn >> 9) & 7; 3711 if (tmp == 0) { 3712 tmp = 8; 3713 } 3714 3715 shift = tcg_constant_i32(tmp); 3716 if (insn & 8) { 3717 rotate(reg, shift, left, 8); 3718 } else { 3719 TCGv X = rotate_x(reg, shift, left, 8); 3720 rotate_x_flags(reg, X, 8); 3721 } 3722 gen_partset_reg(OS_BYTE, DREG(insn, 0), reg); 3723 set_cc_op(s, CC_OP_FLAGS); 3724 } 3725 3726 DISAS_INSN(rotate16_im) 3727 { 3728 int left = (insn & 0x100); 3729 TCGv reg; 3730 TCGv shift; 3731 int tmp; 3732 3733 reg = gen_extend(s, DREG(insn, 0), OS_WORD, 0); 3734 tmp = (insn >> 9) & 7; 3735 if (tmp == 0) { 3736 tmp = 8; 3737 } 3738 3739 shift = tcg_constant_i32(tmp); 3740 if (insn & 8) { 3741 rotate(reg, shift, left, 16); 3742 } else { 3743 TCGv X = rotate_x(reg, shift, left, 16); 3744 rotate_x_flags(reg, X, 16); 3745 } 3746 gen_partset_reg(OS_WORD, DREG(insn, 0), reg); 3747 set_cc_op(s, CC_OP_FLAGS); 3748 } 3749 3750 DISAS_INSN(rotate_reg) 3751 { 3752 TCGv reg; 3753 TCGv src; 3754 TCGv t0, t1; 3755 int left = (insn & 0x100); 3756 3757 reg = DREG(insn, 0); 3758 src = DREG(insn, 9); 3759 /* shift in [0..63] */ 3760 t0 = tcg_temp_new(); 3761 tcg_gen_andi_i32(t0, src, 63); 3762 t1 = tcg_temp_new_i32(); 3763 if (insn & 8) { 3764 tcg_gen_andi_i32(t1, src, 31); 3765 rotate(reg, t1, left, 32); 3766 /* if shift == 0, clear C */ 3767 tcg_gen_movcond_i32(TCG_COND_EQ, QREG_CC_C, 3768 t0, QREG_CC_V /* 0 */, 3769 QREG_CC_V /* 0 */, QREG_CC_C); 3770 } else { 3771 TCGv X; 3772 /* modulo 33 */ 3773 tcg_gen_movi_i32(t1, 33); 3774 tcg_gen_remu_i32(t1, t0, t1); 3775 X = rotate32_x(DREG(insn, 0), t1, left); 3776 rotate_x_flags(DREG(insn, 0), X, 32); 3777 } 3778 set_cc_op(s, CC_OP_FLAGS); 3779 } 3780 3781 DISAS_INSN(rotate8_reg) 3782 { 3783 TCGv reg; 3784 TCGv src; 3785 TCGv t0, t1; 3786 int left = (insn & 0x100); 3787 3788 reg = gen_extend(s, DREG(insn, 0), OS_BYTE, 0); 3789 src = DREG(insn, 9); 3790 /* shift in [0..63] */ 3791 t0 = tcg_temp_new_i32(); 3792 tcg_gen_andi_i32(t0, src, 63); 3793 t1 = tcg_temp_new_i32(); 3794 if (insn & 8) { 3795 tcg_gen_andi_i32(t1, src, 7); 3796 rotate(reg, t1, left, 8); 3797 /* if shift == 0, clear C */ 3798 tcg_gen_movcond_i32(TCG_COND_EQ, QREG_CC_C, 3799 t0, QREG_CC_V /* 0 */, 3800 QREG_CC_V /* 0 */, QREG_CC_C); 3801 } else { 3802 TCGv X; 3803 /* modulo 9 */ 3804 tcg_gen_movi_i32(t1, 9); 3805 tcg_gen_remu_i32(t1, t0, t1); 3806 X = rotate_x(reg, t1, left, 8); 3807 rotate_x_flags(reg, X, 8); 3808 } 3809 gen_partset_reg(OS_BYTE, DREG(insn, 0), reg); 3810 set_cc_op(s, CC_OP_FLAGS); 3811 } 3812 3813 DISAS_INSN(rotate16_reg) 3814 { 3815 TCGv reg; 3816 TCGv src; 3817 TCGv t0, t1; 3818 int left = (insn & 0x100); 3819 3820 reg = gen_extend(s, DREG(insn, 0), OS_WORD, 0); 3821 src = DREG(insn, 9); 3822 /* shift in [0..63] */ 3823 t0 = tcg_temp_new_i32(); 3824 tcg_gen_andi_i32(t0, src, 63); 3825 t1 = tcg_temp_new_i32(); 3826 if (insn & 8) { 3827 tcg_gen_andi_i32(t1, src, 15); 3828 rotate(reg, t1, left, 16); 3829 /* if shift == 0, clear C */ 3830 tcg_gen_movcond_i32(TCG_COND_EQ, QREG_CC_C, 3831 t0, QREG_CC_V /* 0 */, 3832 QREG_CC_V /* 0 */, QREG_CC_C); 3833 } else { 3834 TCGv X; 3835 /* modulo 17 */ 3836 tcg_gen_movi_i32(t1, 17); 3837 tcg_gen_remu_i32(t1, t0, t1); 3838 X = rotate_x(reg, t1, left, 16); 3839 rotate_x_flags(reg, X, 16); 3840 } 3841 gen_partset_reg(OS_WORD, DREG(insn, 0), reg); 3842 set_cc_op(s, CC_OP_FLAGS); 3843 } 3844 3845 DISAS_INSN(rotate_mem) 3846 { 3847 TCGv src; 3848 TCGv addr; 3849 TCGv shift; 3850 int left = (insn & 0x100); 3851 3852 SRC_EA(env, src, OS_WORD, 0, &addr); 3853 3854 shift = tcg_constant_i32(1); 3855 if (insn & 0x0200) { 3856 rotate(src, shift, left, 16); 3857 } else { 3858 TCGv X = rotate_x(src, shift, left, 16); 3859 rotate_x_flags(src, X, 16); 3860 } 3861 DEST_EA(env, insn, OS_WORD, src, &addr); 3862 set_cc_op(s, CC_OP_FLAGS); 3863 } 3864 3865 DISAS_INSN(bfext_reg) 3866 { 3867 int ext = read_im16(env, s); 3868 int is_sign = insn & 0x200; 3869 TCGv src = DREG(insn, 0); 3870 TCGv dst = DREG(ext, 12); 3871 int len = ((extract32(ext, 0, 5) - 1) & 31) + 1; 3872 int ofs = extract32(ext, 6, 5); /* big bit-endian */ 3873 int pos = 32 - ofs - len; /* little bit-endian */ 3874 TCGv tmp = tcg_temp_new(); 3875 TCGv shift; 3876 3877 /* 3878 * In general, we're going to rotate the field so that it's at the 3879 * top of the word and then right-shift by the complement of the 3880 * width to extend the field. 3881 */ 3882 if (ext & 0x20) { 3883 /* Variable width. */ 3884 if (ext & 0x800) { 3885 /* Variable offset. */ 3886 tcg_gen_andi_i32(tmp, DREG(ext, 6), 31); 3887 tcg_gen_rotl_i32(tmp, src, tmp); 3888 } else { 3889 tcg_gen_rotli_i32(tmp, src, ofs); 3890 } 3891 3892 shift = tcg_temp_new(); 3893 tcg_gen_neg_i32(shift, DREG(ext, 0)); 3894 tcg_gen_andi_i32(shift, shift, 31); 3895 tcg_gen_sar_i32(QREG_CC_N, tmp, shift); 3896 if (is_sign) { 3897 tcg_gen_mov_i32(dst, QREG_CC_N); 3898 } else { 3899 tcg_gen_shr_i32(dst, tmp, shift); 3900 } 3901 } else { 3902 /* Immediate width. */ 3903 if (ext & 0x800) { 3904 /* Variable offset */ 3905 tcg_gen_andi_i32(tmp, DREG(ext, 6), 31); 3906 tcg_gen_rotl_i32(tmp, src, tmp); 3907 src = tmp; 3908 pos = 32 - len; 3909 } else { 3910 /* 3911 * Immediate offset. If the field doesn't wrap around the 3912 * end of the word, rely on (s)extract completely. 3913 */ 3914 if (pos < 0) { 3915 tcg_gen_rotli_i32(tmp, src, ofs); 3916 src = tmp; 3917 pos = 32 - len; 3918 } 3919 } 3920 3921 tcg_gen_sextract_i32(QREG_CC_N, src, pos, len); 3922 if (is_sign) { 3923 tcg_gen_mov_i32(dst, QREG_CC_N); 3924 } else { 3925 tcg_gen_extract_i32(dst, src, pos, len); 3926 } 3927 } 3928 3929 set_cc_op(s, CC_OP_LOGIC); 3930 } 3931 3932 DISAS_INSN(bfext_mem) 3933 { 3934 int ext = read_im16(env, s); 3935 int is_sign = insn & 0x200; 3936 TCGv dest = DREG(ext, 12); 3937 TCGv addr, len, ofs; 3938 3939 addr = gen_lea(env, s, insn, OS_UNSIZED); 3940 if (IS_NULL_QREG(addr)) { 3941 gen_addr_fault(s); 3942 return; 3943 } 3944 3945 if (ext & 0x20) { 3946 len = DREG(ext, 0); 3947 } else { 3948 len = tcg_constant_i32(extract32(ext, 0, 5)); 3949 } 3950 if (ext & 0x800) { 3951 ofs = DREG(ext, 6); 3952 } else { 3953 ofs = tcg_constant_i32(extract32(ext, 6, 5)); 3954 } 3955 3956 if (is_sign) { 3957 gen_helper_bfexts_mem(dest, tcg_env, addr, ofs, len); 3958 tcg_gen_mov_i32(QREG_CC_N, dest); 3959 } else { 3960 TCGv_i64 tmp = tcg_temp_new_i64(); 3961 gen_helper_bfextu_mem(tmp, tcg_env, addr, ofs, len); 3962 tcg_gen_extr_i64_i32(dest, QREG_CC_N, tmp); 3963 } 3964 set_cc_op(s, CC_OP_LOGIC); 3965 } 3966 3967 DISAS_INSN(bfop_reg) 3968 { 3969 int ext = read_im16(env, s); 3970 TCGv src = DREG(insn, 0); 3971 int len = ((extract32(ext, 0, 5) - 1) & 31) + 1; 3972 int ofs = extract32(ext, 6, 5); /* big bit-endian */ 3973 TCGv mask, tofs = NULL, tlen = NULL; 3974 bool is_bfffo = (insn & 0x0f00) == 0x0d00; 3975 3976 if ((ext & 0x820) == 0) { 3977 /* Immediate width and offset. */ 3978 uint32_t maski = 0x7fffffffu >> (len - 1); 3979 if (ofs + len <= 32) { 3980 tcg_gen_shli_i32(QREG_CC_N, src, ofs); 3981 } else { 3982 tcg_gen_rotli_i32(QREG_CC_N, src, ofs); 3983 } 3984 tcg_gen_andi_i32(QREG_CC_N, QREG_CC_N, ~maski); 3985 3986 mask = tcg_constant_i32(ror32(maski, ofs)); 3987 if (is_bfffo) { 3988 tofs = tcg_constant_i32(ofs); 3989 tlen = tcg_constant_i32(len); 3990 } 3991 } else { 3992 TCGv tmp = tcg_temp_new(); 3993 3994 mask = tcg_temp_new(); 3995 if (ext & 0x20) { 3996 /* Variable width */ 3997 tcg_gen_subi_i32(tmp, DREG(ext, 0), 1); 3998 tcg_gen_andi_i32(tmp, tmp, 31); 3999 tcg_gen_shr_i32(mask, tcg_constant_i32(0x7fffffffu), tmp); 4000 if (is_bfffo) { 4001 tlen = tcg_temp_new(); 4002 tcg_gen_addi_i32(tlen, tmp, 1); 4003 } 4004 } else { 4005 /* Immediate width */ 4006 tcg_gen_movi_i32(mask, 0x7fffffffu >> (len - 1)); 4007 if (is_bfffo) { 4008 tlen = tcg_constant_i32(len); 4009 } 4010 } 4011 4012 if (ext & 0x800) { 4013 /* Variable offset */ 4014 tcg_gen_andi_i32(tmp, DREG(ext, 6), 31); 4015 tcg_gen_rotl_i32(QREG_CC_N, src, tmp); 4016 tcg_gen_andc_i32(QREG_CC_N, QREG_CC_N, mask); 4017 tcg_gen_rotr_i32(mask, mask, tmp); 4018 if (is_bfffo) { 4019 tofs = tmp; 4020 } 4021 } else { 4022 /* Immediate offset (and variable width) */ 4023 tcg_gen_rotli_i32(QREG_CC_N, src, ofs); 4024 tcg_gen_andc_i32(QREG_CC_N, QREG_CC_N, mask); 4025 tcg_gen_rotri_i32(mask, mask, ofs); 4026 if (is_bfffo) { 4027 tofs = tcg_constant_i32(ofs); 4028 } 4029 } 4030 } 4031 set_cc_op(s, CC_OP_LOGIC); 4032 4033 switch (insn & 0x0f00) { 4034 case 0x0a00: /* bfchg */ 4035 tcg_gen_eqv_i32(src, src, mask); 4036 break; 4037 case 0x0c00: /* bfclr */ 4038 tcg_gen_and_i32(src, src, mask); 4039 break; 4040 case 0x0d00: /* bfffo */ 4041 gen_helper_bfffo_reg(DREG(ext, 12), QREG_CC_N, tofs, tlen); 4042 break; 4043 case 0x0e00: /* bfset */ 4044 tcg_gen_orc_i32(src, src, mask); 4045 break; 4046 case 0x0800: /* bftst */ 4047 /* flags already set; no other work to do. */ 4048 break; 4049 default: 4050 g_assert_not_reached(); 4051 } 4052 } 4053 4054 DISAS_INSN(bfop_mem) 4055 { 4056 int ext = read_im16(env, s); 4057 TCGv addr, len, ofs; 4058 TCGv_i64 t64; 4059 4060 addr = gen_lea(env, s, insn, OS_UNSIZED); 4061 if (IS_NULL_QREG(addr)) { 4062 gen_addr_fault(s); 4063 return; 4064 } 4065 4066 if (ext & 0x20) { 4067 len = DREG(ext, 0); 4068 } else { 4069 len = tcg_constant_i32(extract32(ext, 0, 5)); 4070 } 4071 if (ext & 0x800) { 4072 ofs = DREG(ext, 6); 4073 } else { 4074 ofs = tcg_constant_i32(extract32(ext, 6, 5)); 4075 } 4076 4077 switch (insn & 0x0f00) { 4078 case 0x0a00: /* bfchg */ 4079 gen_helper_bfchg_mem(QREG_CC_N, tcg_env, addr, ofs, len); 4080 break; 4081 case 0x0c00: /* bfclr */ 4082 gen_helper_bfclr_mem(QREG_CC_N, tcg_env, addr, ofs, len); 4083 break; 4084 case 0x0d00: /* bfffo */ 4085 t64 = tcg_temp_new_i64(); 4086 gen_helper_bfffo_mem(t64, tcg_env, addr, ofs, len); 4087 tcg_gen_extr_i64_i32(DREG(ext, 12), QREG_CC_N, t64); 4088 break; 4089 case 0x0e00: /* bfset */ 4090 gen_helper_bfset_mem(QREG_CC_N, tcg_env, addr, ofs, len); 4091 break; 4092 case 0x0800: /* bftst */ 4093 gen_helper_bfexts_mem(QREG_CC_N, tcg_env, addr, ofs, len); 4094 break; 4095 default: 4096 g_assert_not_reached(); 4097 } 4098 set_cc_op(s, CC_OP_LOGIC); 4099 } 4100 4101 DISAS_INSN(bfins_reg) 4102 { 4103 int ext = read_im16(env, s); 4104 TCGv dst = DREG(insn, 0); 4105 TCGv src = DREG(ext, 12); 4106 int len = ((extract32(ext, 0, 5) - 1) & 31) + 1; 4107 int ofs = extract32(ext, 6, 5); /* big bit-endian */ 4108 int pos = 32 - ofs - len; /* little bit-endian */ 4109 TCGv tmp; 4110 4111 tmp = tcg_temp_new(); 4112 4113 if (ext & 0x20) { 4114 /* Variable width */ 4115 tcg_gen_neg_i32(tmp, DREG(ext, 0)); 4116 tcg_gen_andi_i32(tmp, tmp, 31); 4117 tcg_gen_shl_i32(QREG_CC_N, src, tmp); 4118 } else { 4119 /* Immediate width */ 4120 tcg_gen_shli_i32(QREG_CC_N, src, 32 - len); 4121 } 4122 set_cc_op(s, CC_OP_LOGIC); 4123 4124 /* Immediate width and offset */ 4125 if ((ext & 0x820) == 0) { 4126 /* Check for suitability for deposit. */ 4127 if (pos >= 0) { 4128 tcg_gen_deposit_i32(dst, dst, src, pos, len); 4129 } else { 4130 uint32_t maski = -2U << (len - 1); 4131 uint32_t roti = (ofs + len) & 31; 4132 tcg_gen_andi_i32(tmp, src, ~maski); 4133 tcg_gen_rotri_i32(tmp, tmp, roti); 4134 tcg_gen_andi_i32(dst, dst, ror32(maski, roti)); 4135 tcg_gen_or_i32(dst, dst, tmp); 4136 } 4137 } else { 4138 TCGv mask = tcg_temp_new(); 4139 TCGv rot = tcg_temp_new(); 4140 4141 if (ext & 0x20) { 4142 /* Variable width */ 4143 tcg_gen_subi_i32(rot, DREG(ext, 0), 1); 4144 tcg_gen_andi_i32(rot, rot, 31); 4145 tcg_gen_movi_i32(mask, -2); 4146 tcg_gen_shl_i32(mask, mask, rot); 4147 tcg_gen_mov_i32(rot, DREG(ext, 0)); 4148 tcg_gen_andc_i32(tmp, src, mask); 4149 } else { 4150 /* Immediate width (variable offset) */ 4151 uint32_t maski = -2U << (len - 1); 4152 tcg_gen_andi_i32(tmp, src, ~maski); 4153 tcg_gen_movi_i32(mask, maski); 4154 tcg_gen_movi_i32(rot, len & 31); 4155 } 4156 if (ext & 0x800) { 4157 /* Variable offset */ 4158 tcg_gen_add_i32(rot, rot, DREG(ext, 6)); 4159 } else { 4160 /* Immediate offset (variable width) */ 4161 tcg_gen_addi_i32(rot, rot, ofs); 4162 } 4163 tcg_gen_andi_i32(rot, rot, 31); 4164 tcg_gen_rotr_i32(mask, mask, rot); 4165 tcg_gen_rotr_i32(tmp, tmp, rot); 4166 tcg_gen_and_i32(dst, dst, mask); 4167 tcg_gen_or_i32(dst, dst, tmp); 4168 } 4169 } 4170 4171 DISAS_INSN(bfins_mem) 4172 { 4173 int ext = read_im16(env, s); 4174 TCGv src = DREG(ext, 12); 4175 TCGv addr, len, ofs; 4176 4177 addr = gen_lea(env, s, insn, OS_UNSIZED); 4178 if (IS_NULL_QREG(addr)) { 4179 gen_addr_fault(s); 4180 return; 4181 } 4182 4183 if (ext & 0x20) { 4184 len = DREG(ext, 0); 4185 } else { 4186 len = tcg_constant_i32(extract32(ext, 0, 5)); 4187 } 4188 if (ext & 0x800) { 4189 ofs = DREG(ext, 6); 4190 } else { 4191 ofs = tcg_constant_i32(extract32(ext, 6, 5)); 4192 } 4193 4194 gen_helper_bfins_mem(QREG_CC_N, tcg_env, addr, src, ofs, len); 4195 set_cc_op(s, CC_OP_LOGIC); 4196 } 4197 4198 DISAS_INSN(ff1) 4199 { 4200 TCGv reg; 4201 reg = DREG(insn, 0); 4202 gen_logic_cc(s, reg, OS_LONG); 4203 gen_helper_ff1(reg, reg); 4204 } 4205 4206 DISAS_INSN(chk) 4207 { 4208 TCGv src, reg; 4209 int opsize; 4210 4211 switch ((insn >> 7) & 3) { 4212 case 3: 4213 opsize = OS_WORD; 4214 break; 4215 case 2: 4216 if (m68k_feature(env, M68K_FEATURE_CHK2)) { 4217 opsize = OS_LONG; 4218 break; 4219 } 4220 /* fallthru */ 4221 default: 4222 gen_exception(s, s->base.pc_next, EXCP_ILLEGAL); 4223 return; 4224 } 4225 SRC_EA(env, src, opsize, 1, NULL); 4226 reg = gen_extend(s, DREG(insn, 9), opsize, 1); 4227 4228 gen_flush_flags(s); 4229 gen_helper_chk(tcg_env, reg, src); 4230 } 4231 4232 DISAS_INSN(chk2) 4233 { 4234 uint16_t ext; 4235 TCGv addr1, addr2, bound1, bound2, reg; 4236 int opsize; 4237 4238 switch ((insn >> 9) & 3) { 4239 case 0: 4240 opsize = OS_BYTE; 4241 break; 4242 case 1: 4243 opsize = OS_WORD; 4244 break; 4245 case 2: 4246 opsize = OS_LONG; 4247 break; 4248 default: 4249 gen_exception(s, s->base.pc_next, EXCP_ILLEGAL); 4250 return; 4251 } 4252 4253 ext = read_im16(env, s); 4254 if ((ext & 0x0800) == 0) { 4255 gen_exception(s, s->base.pc_next, EXCP_ILLEGAL); 4256 return; 4257 } 4258 4259 addr1 = gen_lea(env, s, insn, OS_UNSIZED); 4260 addr2 = tcg_temp_new(); 4261 tcg_gen_addi_i32(addr2, addr1, opsize_bytes(opsize)); 4262 4263 bound1 = gen_load(s, opsize, addr1, 1, IS_USER(s)); 4264 bound2 = gen_load(s, opsize, addr2, 1, IS_USER(s)); 4265 4266 reg = tcg_temp_new(); 4267 if (ext & 0x8000) { 4268 tcg_gen_mov_i32(reg, AREG(ext, 12)); 4269 } else { 4270 gen_ext(reg, DREG(ext, 12), opsize, 1); 4271 } 4272 4273 gen_flush_flags(s); 4274 gen_helper_chk2(tcg_env, reg, bound1, bound2); 4275 } 4276 4277 static void m68k_copy_line(TCGv dst, TCGv src, int index) 4278 { 4279 TCGv addr; 4280 TCGv_i64 t0, t1; 4281 4282 addr = tcg_temp_new(); 4283 4284 t0 = tcg_temp_new_i64(); 4285 t1 = tcg_temp_new_i64(); 4286 4287 tcg_gen_andi_i32(addr, src, ~15); 4288 tcg_gen_qemu_ld_i64(t0, addr, index, MO_TEUQ); 4289 tcg_gen_addi_i32(addr, addr, 8); 4290 tcg_gen_qemu_ld_i64(t1, addr, index, MO_TEUQ); 4291 4292 tcg_gen_andi_i32(addr, dst, ~15); 4293 tcg_gen_qemu_st_i64(t0, addr, index, MO_TEUQ); 4294 tcg_gen_addi_i32(addr, addr, 8); 4295 tcg_gen_qemu_st_i64(t1, addr, index, MO_TEUQ); 4296 } 4297 4298 DISAS_INSN(move16_reg) 4299 { 4300 int index = IS_USER(s); 4301 TCGv tmp; 4302 uint16_t ext; 4303 4304 ext = read_im16(env, s); 4305 if ((ext & (1 << 15)) == 0) { 4306 gen_exception(s, s->base.pc_next, EXCP_ILLEGAL); 4307 } 4308 4309 m68k_copy_line(AREG(ext, 12), AREG(insn, 0), index); 4310 4311 /* Ax can be Ay, so save Ay before incrementing Ax */ 4312 tmp = tcg_temp_new(); 4313 tcg_gen_mov_i32(tmp, AREG(ext, 12)); 4314 tcg_gen_addi_i32(AREG(insn, 0), AREG(insn, 0), 16); 4315 tcg_gen_addi_i32(AREG(ext, 12), tmp, 16); 4316 } 4317 4318 DISAS_INSN(move16_mem) 4319 { 4320 int index = IS_USER(s); 4321 TCGv reg, addr; 4322 4323 reg = AREG(insn, 0); 4324 addr = tcg_constant_i32(read_im32(env, s)); 4325 4326 if ((insn >> 3) & 1) { 4327 /* MOVE16 (xxx).L, (Ay) */ 4328 m68k_copy_line(reg, addr, index); 4329 } else { 4330 /* MOVE16 (Ay), (xxx).L */ 4331 m68k_copy_line(addr, reg, index); 4332 } 4333 4334 if (((insn >> 3) & 2) == 0) { 4335 /* (Ay)+ */ 4336 tcg_gen_addi_i32(reg, reg, 16); 4337 } 4338 } 4339 4340 DISAS_INSN(strldsr) 4341 { 4342 uint16_t ext; 4343 uint32_t addr; 4344 4345 addr = s->pc - 2; 4346 ext = read_im16(env, s); 4347 if (ext != 0x46FC) { 4348 gen_exception(s, addr, EXCP_ILLEGAL); 4349 return; 4350 } 4351 ext = read_im16(env, s); 4352 if (IS_USER(s) || (ext & SR_S) == 0) { 4353 gen_exception(s, addr, EXCP_PRIVILEGE); 4354 return; 4355 } 4356 gen_push(s, gen_get_sr(s)); 4357 gen_set_sr_im(s, ext, 0); 4358 gen_exit_tb(s); 4359 } 4360 4361 DISAS_INSN(move_from_sr) 4362 { 4363 TCGv sr; 4364 4365 if (IS_USER(s) && m68k_feature(env, M68K_FEATURE_MOVEFROMSR_PRIV)) { 4366 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE); 4367 return; 4368 } 4369 sr = gen_get_sr(s); 4370 DEST_EA(env, insn, OS_WORD, sr, NULL); 4371 } 4372 4373 #if !defined(CONFIG_USER_ONLY) 4374 DISAS_INSN(moves) 4375 { 4376 int opsize; 4377 uint16_t ext; 4378 TCGv reg; 4379 TCGv addr; 4380 int extend; 4381 4382 if (IS_USER(s)) { 4383 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE); 4384 return; 4385 } 4386 4387 ext = read_im16(env, s); 4388 4389 opsize = insn_opsize(insn); 4390 4391 if (ext & 0x8000) { 4392 /* address register */ 4393 reg = AREG(ext, 12); 4394 extend = 1; 4395 } else { 4396 /* data register */ 4397 reg = DREG(ext, 12); 4398 extend = 0; 4399 } 4400 4401 addr = gen_lea(env, s, insn, opsize); 4402 if (IS_NULL_QREG(addr)) { 4403 gen_addr_fault(s); 4404 return; 4405 } 4406 4407 if (ext & 0x0800) { 4408 /* from reg to ea */ 4409 gen_store(s, opsize, addr, reg, DFC_INDEX(s)); 4410 } else { 4411 /* from ea to reg */ 4412 TCGv tmp = gen_load(s, opsize, addr, 0, SFC_INDEX(s)); 4413 if (extend) { 4414 gen_ext(reg, tmp, opsize, 1); 4415 } else { 4416 gen_partset_reg(opsize, reg, tmp); 4417 } 4418 } 4419 switch (extract32(insn, 3, 3)) { 4420 case 3: /* Indirect postincrement. */ 4421 tcg_gen_addi_i32(AREG(insn, 0), addr, 4422 REG(insn, 0) == 7 && opsize == OS_BYTE 4423 ? 2 4424 : opsize_bytes(opsize)); 4425 break; 4426 case 4: /* Indirect predecrememnt. */ 4427 tcg_gen_mov_i32(AREG(insn, 0), addr); 4428 break; 4429 } 4430 } 4431 4432 DISAS_INSN(move_to_sr) 4433 { 4434 if (IS_USER(s)) { 4435 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE); 4436 return; 4437 } 4438 gen_move_to_sr(env, s, insn, false); 4439 gen_exit_tb(s); 4440 } 4441 4442 DISAS_INSN(move_from_usp) 4443 { 4444 if (IS_USER(s)) { 4445 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE); 4446 return; 4447 } 4448 tcg_gen_ld_i32(AREG(insn, 0), tcg_env, 4449 offsetof(CPUM68KState, sp[M68K_USP])); 4450 } 4451 4452 DISAS_INSN(move_to_usp) 4453 { 4454 if (IS_USER(s)) { 4455 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE); 4456 return; 4457 } 4458 tcg_gen_st_i32(AREG(insn, 0), tcg_env, 4459 offsetof(CPUM68KState, sp[M68K_USP])); 4460 } 4461 4462 DISAS_INSN(halt) 4463 { 4464 if (IS_USER(s)) { 4465 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE); 4466 return; 4467 } 4468 4469 gen_exception(s, s->pc, EXCP_HALT_INSN); 4470 } 4471 4472 DISAS_INSN(stop) 4473 { 4474 uint16_t ext; 4475 4476 if (IS_USER(s)) { 4477 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE); 4478 return; 4479 } 4480 4481 ext = read_im16(env, s); 4482 4483 gen_set_sr_im(s, ext, 0); 4484 tcg_gen_movi_i32(cpu_halted, 1); 4485 gen_exception(s, s->pc, EXCP_HLT); 4486 } 4487 4488 DISAS_INSN(rte) 4489 { 4490 if (IS_USER(s)) { 4491 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE); 4492 return; 4493 } 4494 gen_exception(s, s->base.pc_next, EXCP_RTE); 4495 } 4496 4497 DISAS_INSN(cf_movec) 4498 { 4499 uint16_t ext; 4500 TCGv reg; 4501 4502 if (IS_USER(s)) { 4503 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE); 4504 return; 4505 } 4506 4507 ext = read_im16(env, s); 4508 4509 if (ext & 0x8000) { 4510 reg = AREG(ext, 12); 4511 } else { 4512 reg = DREG(ext, 12); 4513 } 4514 gen_helper_cf_movec_to(tcg_env, tcg_constant_i32(ext & 0xfff), reg); 4515 gen_exit_tb(s); 4516 } 4517 4518 DISAS_INSN(m68k_movec) 4519 { 4520 uint16_t ext; 4521 TCGv reg, creg; 4522 4523 if (IS_USER(s)) { 4524 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE); 4525 return; 4526 } 4527 4528 ext = read_im16(env, s); 4529 4530 if (ext & 0x8000) { 4531 reg = AREG(ext, 12); 4532 } else { 4533 reg = DREG(ext, 12); 4534 } 4535 creg = tcg_constant_i32(ext & 0xfff); 4536 if (insn & 1) { 4537 gen_helper_m68k_movec_to(tcg_env, creg, reg); 4538 } else { 4539 gen_helper_m68k_movec_from(reg, tcg_env, creg); 4540 } 4541 gen_exit_tb(s); 4542 } 4543 4544 DISAS_INSN(intouch) 4545 { 4546 if (IS_USER(s)) { 4547 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE); 4548 return; 4549 } 4550 /* ICache fetch. Implement as no-op. */ 4551 } 4552 4553 DISAS_INSN(cpushl) 4554 { 4555 if (IS_USER(s)) { 4556 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE); 4557 return; 4558 } 4559 /* Cache push/invalidate. Implement as no-op. */ 4560 } 4561 4562 DISAS_INSN(cpush) 4563 { 4564 if (IS_USER(s)) { 4565 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE); 4566 return; 4567 } 4568 /* Cache push/invalidate. Implement as no-op. */ 4569 } 4570 4571 DISAS_INSN(cinv) 4572 { 4573 if (IS_USER(s)) { 4574 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE); 4575 return; 4576 } 4577 /* Invalidate cache line. Implement as no-op. */ 4578 } 4579 4580 #if !defined(CONFIG_USER_ONLY) 4581 DISAS_INSN(pflush) 4582 { 4583 TCGv opmode; 4584 4585 if (IS_USER(s)) { 4586 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE); 4587 return; 4588 } 4589 4590 opmode = tcg_constant_i32((insn >> 3) & 3); 4591 gen_helper_pflush(tcg_env, AREG(insn, 0), opmode); 4592 } 4593 4594 DISAS_INSN(ptest) 4595 { 4596 TCGv is_read; 4597 4598 if (IS_USER(s)) { 4599 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE); 4600 return; 4601 } 4602 is_read = tcg_constant_i32((insn >> 5) & 1); 4603 gen_helper_ptest(tcg_env, AREG(insn, 0), is_read); 4604 } 4605 #endif 4606 4607 DISAS_INSN(wddata) 4608 { 4609 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE); 4610 } 4611 4612 DISAS_INSN(wdebug) 4613 { 4614 if (IS_USER(s)) { 4615 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE); 4616 return; 4617 } 4618 /* TODO: Implement wdebug. */ 4619 cpu_abort(env_cpu(env), "WDEBUG not implemented"); 4620 } 4621 #endif 4622 4623 DISAS_INSN(trap) 4624 { 4625 gen_exception(s, s->pc, EXCP_TRAP0 + (insn & 0xf)); 4626 } 4627 4628 static void do_trapcc(DisasContext *s, DisasCompare *c) 4629 { 4630 if (c->tcond != TCG_COND_NEVER) { 4631 TCGLabel *over = NULL; 4632 4633 update_cc_op(s); 4634 4635 if (c->tcond != TCG_COND_ALWAYS) { 4636 /* Jump over if !c. */ 4637 over = gen_new_label(); 4638 tcg_gen_brcond_i32(tcg_invert_cond(c->tcond), c->v1, c->v2, over); 4639 } 4640 4641 tcg_gen_movi_i32(QREG_PC, s->pc); 4642 gen_raise_exception_format2(s, EXCP_TRAPCC, s->base.pc_next); 4643 4644 if (over != NULL) { 4645 gen_set_label(over); 4646 s->base.is_jmp = DISAS_NEXT; 4647 } 4648 } 4649 } 4650 4651 DISAS_INSN(trapcc) 4652 { 4653 DisasCompare c; 4654 4655 /* Consume and discard the immediate operand. */ 4656 switch (extract32(insn, 0, 3)) { 4657 case 2: /* trapcc.w */ 4658 (void)read_im16(env, s); 4659 break; 4660 case 3: /* trapcc.l */ 4661 (void)read_im32(env, s); 4662 break; 4663 case 4: /* trapcc (no operand) */ 4664 break; 4665 default: 4666 /* trapcc registered with only valid opmodes */ 4667 g_assert_not_reached(); 4668 } 4669 4670 gen_cc_cond(&c, s, extract32(insn, 8, 4)); 4671 do_trapcc(s, &c); 4672 } 4673 4674 DISAS_INSN(trapv) 4675 { 4676 DisasCompare c; 4677 4678 gen_cc_cond(&c, s, 9); /* V set */ 4679 do_trapcc(s, &c); 4680 } 4681 4682 static void gen_load_fcr(DisasContext *s, TCGv res, int reg) 4683 { 4684 switch (reg) { 4685 case M68K_FPIAR: 4686 tcg_gen_movi_i32(res, 0); 4687 break; 4688 case M68K_FPSR: 4689 tcg_gen_ld_i32(res, tcg_env, offsetof(CPUM68KState, fpsr)); 4690 break; 4691 case M68K_FPCR: 4692 tcg_gen_ld_i32(res, tcg_env, offsetof(CPUM68KState, fpcr)); 4693 break; 4694 } 4695 } 4696 4697 static void gen_store_fcr(DisasContext *s, TCGv val, int reg) 4698 { 4699 switch (reg) { 4700 case M68K_FPIAR: 4701 break; 4702 case M68K_FPSR: 4703 tcg_gen_st_i32(val, tcg_env, offsetof(CPUM68KState, fpsr)); 4704 break; 4705 case M68K_FPCR: 4706 gen_helper_set_fpcr(tcg_env, val); 4707 break; 4708 } 4709 } 4710 4711 static void gen_qemu_store_fcr(DisasContext *s, TCGv addr, int reg) 4712 { 4713 int index = IS_USER(s); 4714 TCGv tmp; 4715 4716 tmp = tcg_temp_new(); 4717 gen_load_fcr(s, tmp, reg); 4718 tcg_gen_qemu_st_tl(tmp, addr, index, MO_TEUL); 4719 } 4720 4721 static void gen_qemu_load_fcr(DisasContext *s, TCGv addr, int reg) 4722 { 4723 int index = IS_USER(s); 4724 TCGv tmp; 4725 4726 tmp = tcg_temp_new(); 4727 tcg_gen_qemu_ld_tl(tmp, addr, index, MO_TEUL); 4728 gen_store_fcr(s, tmp, reg); 4729 } 4730 4731 4732 static void gen_op_fmove_fcr(CPUM68KState *env, DisasContext *s, 4733 uint32_t insn, uint32_t ext) 4734 { 4735 int mask = (ext >> 10) & 7; 4736 int is_write = (ext >> 13) & 1; 4737 int mode = extract32(insn, 3, 3); 4738 int i; 4739 TCGv addr, tmp; 4740 4741 switch (mode) { 4742 case 0: /* Dn */ 4743 if (mask != M68K_FPIAR && mask != M68K_FPSR && mask != M68K_FPCR) { 4744 gen_exception(s, s->base.pc_next, EXCP_ILLEGAL); 4745 return; 4746 } 4747 if (is_write) { 4748 gen_load_fcr(s, DREG(insn, 0), mask); 4749 } else { 4750 gen_store_fcr(s, DREG(insn, 0), mask); 4751 } 4752 return; 4753 case 1: /* An, only with FPIAR */ 4754 if (mask != M68K_FPIAR) { 4755 gen_exception(s, s->base.pc_next, EXCP_ILLEGAL); 4756 return; 4757 } 4758 if (is_write) { 4759 gen_load_fcr(s, AREG(insn, 0), mask); 4760 } else { 4761 gen_store_fcr(s, AREG(insn, 0), mask); 4762 } 4763 return; 4764 case 7: /* Immediate */ 4765 if (REG(insn, 0) == 4) { 4766 if (is_write || 4767 (mask != M68K_FPIAR && mask != M68K_FPSR && 4768 mask != M68K_FPCR)) { 4769 gen_exception(s, s->base.pc_next, EXCP_ILLEGAL); 4770 return; 4771 } 4772 tmp = tcg_constant_i32(read_im32(env, s)); 4773 gen_store_fcr(s, tmp, mask); 4774 return; 4775 } 4776 break; 4777 default: 4778 break; 4779 } 4780 4781 tmp = gen_lea(env, s, insn, OS_LONG); 4782 if (IS_NULL_QREG(tmp)) { 4783 gen_addr_fault(s); 4784 return; 4785 } 4786 4787 addr = tcg_temp_new(); 4788 tcg_gen_mov_i32(addr, tmp); 4789 4790 /* 4791 * mask: 4792 * 4793 * 0b100 Floating-Point Control Register 4794 * 0b010 Floating-Point Status Register 4795 * 0b001 Floating-Point Instruction Address Register 4796 * 4797 */ 4798 4799 if (is_write && mode == 4) { 4800 for (i = 2; i >= 0; i--, mask >>= 1) { 4801 if (mask & 1) { 4802 gen_qemu_store_fcr(s, addr, 1 << i); 4803 if (mask != 1) { 4804 tcg_gen_subi_i32(addr, addr, opsize_bytes(OS_LONG)); 4805 } 4806 } 4807 } 4808 tcg_gen_mov_i32(AREG(insn, 0), addr); 4809 } else { 4810 for (i = 0; i < 3; i++, mask >>= 1) { 4811 if (mask & 1) { 4812 if (is_write) { 4813 gen_qemu_store_fcr(s, addr, 1 << i); 4814 } else { 4815 gen_qemu_load_fcr(s, addr, 1 << i); 4816 } 4817 if (mask != 1 || mode == 3) { 4818 tcg_gen_addi_i32(addr, addr, opsize_bytes(OS_LONG)); 4819 } 4820 } 4821 } 4822 if (mode == 3) { 4823 tcg_gen_mov_i32(AREG(insn, 0), addr); 4824 } 4825 } 4826 } 4827 4828 static void gen_op_fmovem(CPUM68KState *env, DisasContext *s, 4829 uint32_t insn, uint32_t ext) 4830 { 4831 int opsize; 4832 TCGv addr, tmp; 4833 int mode = (ext >> 11) & 0x3; 4834 int is_load = ((ext & 0x2000) == 0); 4835 4836 if (m68k_feature(s->env, M68K_FEATURE_FPU)) { 4837 opsize = OS_EXTENDED; 4838 } else { 4839 opsize = OS_DOUBLE; /* FIXME */ 4840 } 4841 4842 addr = gen_lea(env, s, insn, opsize); 4843 if (IS_NULL_QREG(addr)) { 4844 gen_addr_fault(s); 4845 return; 4846 } 4847 4848 tmp = tcg_temp_new(); 4849 if (mode & 0x1) { 4850 /* Dynamic register list */ 4851 tcg_gen_ext8u_i32(tmp, DREG(ext, 4)); 4852 } else { 4853 /* Static register list */ 4854 tcg_gen_movi_i32(tmp, ext & 0xff); 4855 } 4856 4857 if (!is_load && (mode & 2) == 0) { 4858 /* 4859 * predecrement addressing mode 4860 * only available to store register to memory 4861 */ 4862 if (opsize == OS_EXTENDED) { 4863 gen_helper_fmovemx_st_predec(tmp, tcg_env, addr, tmp); 4864 } else { 4865 gen_helper_fmovemd_st_predec(tmp, tcg_env, addr, tmp); 4866 } 4867 } else { 4868 /* postincrement addressing mode */ 4869 if (opsize == OS_EXTENDED) { 4870 if (is_load) { 4871 gen_helper_fmovemx_ld_postinc(tmp, tcg_env, addr, tmp); 4872 } else { 4873 gen_helper_fmovemx_st_postinc(tmp, tcg_env, addr, tmp); 4874 } 4875 } else { 4876 if (is_load) { 4877 gen_helper_fmovemd_ld_postinc(tmp, tcg_env, addr, tmp); 4878 } else { 4879 gen_helper_fmovemd_st_postinc(tmp, tcg_env, addr, tmp); 4880 } 4881 } 4882 } 4883 if ((insn & 070) == 030 || (insn & 070) == 040) { 4884 tcg_gen_mov_i32(AREG(insn, 0), tmp); 4885 } 4886 } 4887 4888 /* 4889 * ??? FP exceptions are not implemented. Most exceptions are deferred until 4890 * immediately before the next FP instruction is executed. 4891 */ 4892 DISAS_INSN(fpu) 4893 { 4894 uint16_t ext; 4895 int opmode; 4896 int opsize; 4897 TCGv_ptr cpu_src, cpu_dest; 4898 4899 ext = read_im16(env, s); 4900 opmode = ext & 0x7f; 4901 switch ((ext >> 13) & 7) { 4902 case 0: 4903 break; 4904 case 1: 4905 goto undef; 4906 case 2: 4907 if (insn == 0xf200 && (ext & 0xfc00) == 0x5c00) { 4908 /* fmovecr */ 4909 TCGv rom_offset = tcg_constant_i32(opmode); 4910 cpu_dest = gen_fp_ptr(REG(ext, 7)); 4911 gen_helper_fconst(tcg_env, cpu_dest, rom_offset); 4912 return; 4913 } 4914 break; 4915 case 3: /* fmove out */ 4916 cpu_src = gen_fp_ptr(REG(ext, 7)); 4917 opsize = ext_opsize(ext, 10); 4918 if (gen_ea_fp(env, s, insn, opsize, cpu_src, 4919 EA_STORE, IS_USER(s)) == -1) { 4920 gen_addr_fault(s); 4921 } 4922 gen_helper_ftst(tcg_env, cpu_src); 4923 return; 4924 case 4: /* fmove to control register. */ 4925 case 5: /* fmove from control register. */ 4926 gen_op_fmove_fcr(env, s, insn, ext); 4927 return; 4928 case 6: /* fmovem */ 4929 case 7: 4930 if ((ext & 0x1000) == 0 && !m68k_feature(s->env, M68K_FEATURE_FPU)) { 4931 goto undef; 4932 } 4933 gen_op_fmovem(env, s, insn, ext); 4934 return; 4935 } 4936 if (ext & (1 << 14)) { 4937 /* Source effective address. */ 4938 opsize = ext_opsize(ext, 10); 4939 cpu_src = gen_fp_result_ptr(); 4940 if (gen_ea_fp(env, s, insn, opsize, cpu_src, 4941 EA_LOADS, IS_USER(s)) == -1) { 4942 gen_addr_fault(s); 4943 return; 4944 } 4945 } else { 4946 /* Source register. */ 4947 opsize = OS_EXTENDED; 4948 cpu_src = gen_fp_ptr(REG(ext, 10)); 4949 } 4950 cpu_dest = gen_fp_ptr(REG(ext, 7)); 4951 switch (opmode) { 4952 case 0: /* fmove */ 4953 gen_fp_move(cpu_dest, cpu_src); 4954 break; 4955 case 0x40: /* fsmove */ 4956 gen_helper_fsround(tcg_env, cpu_dest, cpu_src); 4957 break; 4958 case 0x44: /* fdmove */ 4959 gen_helper_fdround(tcg_env, cpu_dest, cpu_src); 4960 break; 4961 case 1: /* fint */ 4962 gen_helper_firound(tcg_env, cpu_dest, cpu_src); 4963 break; 4964 case 2: /* fsinh */ 4965 gen_helper_fsinh(tcg_env, cpu_dest, cpu_src); 4966 break; 4967 case 3: /* fintrz */ 4968 gen_helper_fitrunc(tcg_env, cpu_dest, cpu_src); 4969 break; 4970 case 4: /* fsqrt */ 4971 gen_helper_fsqrt(tcg_env, cpu_dest, cpu_src); 4972 break; 4973 case 0x41: /* fssqrt */ 4974 gen_helper_fssqrt(tcg_env, cpu_dest, cpu_src); 4975 break; 4976 case 0x45: /* fdsqrt */ 4977 gen_helper_fdsqrt(tcg_env, cpu_dest, cpu_src); 4978 break; 4979 case 0x06: /* flognp1 */ 4980 gen_helper_flognp1(tcg_env, cpu_dest, cpu_src); 4981 break; 4982 case 0x08: /* fetoxm1 */ 4983 gen_helper_fetoxm1(tcg_env, cpu_dest, cpu_src); 4984 break; 4985 case 0x09: /* ftanh */ 4986 gen_helper_ftanh(tcg_env, cpu_dest, cpu_src); 4987 break; 4988 case 0x0a: /* fatan */ 4989 gen_helper_fatan(tcg_env, cpu_dest, cpu_src); 4990 break; 4991 case 0x0c: /* fasin */ 4992 gen_helper_fasin(tcg_env, cpu_dest, cpu_src); 4993 break; 4994 case 0x0d: /* fatanh */ 4995 gen_helper_fatanh(tcg_env, cpu_dest, cpu_src); 4996 break; 4997 case 0x0e: /* fsin */ 4998 gen_helper_fsin(tcg_env, cpu_dest, cpu_src); 4999 break; 5000 case 0x0f: /* ftan */ 5001 gen_helper_ftan(tcg_env, cpu_dest, cpu_src); 5002 break; 5003 case 0x10: /* fetox */ 5004 gen_helper_fetox(tcg_env, cpu_dest, cpu_src); 5005 break; 5006 case 0x11: /* ftwotox */ 5007 gen_helper_ftwotox(tcg_env, cpu_dest, cpu_src); 5008 break; 5009 case 0x12: /* ftentox */ 5010 gen_helper_ftentox(tcg_env, cpu_dest, cpu_src); 5011 break; 5012 case 0x14: /* flogn */ 5013 gen_helper_flogn(tcg_env, cpu_dest, cpu_src); 5014 break; 5015 case 0x15: /* flog10 */ 5016 gen_helper_flog10(tcg_env, cpu_dest, cpu_src); 5017 break; 5018 case 0x16: /* flog2 */ 5019 gen_helper_flog2(tcg_env, cpu_dest, cpu_src); 5020 break; 5021 case 0x18: /* fabs */ 5022 gen_helper_fabs(tcg_env, cpu_dest, cpu_src); 5023 break; 5024 case 0x58: /* fsabs */ 5025 gen_helper_fsabs(tcg_env, cpu_dest, cpu_src); 5026 break; 5027 case 0x5c: /* fdabs */ 5028 gen_helper_fdabs(tcg_env, cpu_dest, cpu_src); 5029 break; 5030 case 0x19: /* fcosh */ 5031 gen_helper_fcosh(tcg_env, cpu_dest, cpu_src); 5032 break; 5033 case 0x1a: /* fneg */ 5034 gen_helper_fneg(tcg_env, cpu_dest, cpu_src); 5035 break; 5036 case 0x5a: /* fsneg */ 5037 gen_helper_fsneg(tcg_env, cpu_dest, cpu_src); 5038 break; 5039 case 0x5e: /* fdneg */ 5040 gen_helper_fdneg(tcg_env, cpu_dest, cpu_src); 5041 break; 5042 case 0x1c: /* facos */ 5043 gen_helper_facos(tcg_env, cpu_dest, cpu_src); 5044 break; 5045 case 0x1d: /* fcos */ 5046 gen_helper_fcos(tcg_env, cpu_dest, cpu_src); 5047 break; 5048 case 0x1e: /* fgetexp */ 5049 gen_helper_fgetexp(tcg_env, cpu_dest, cpu_src); 5050 break; 5051 case 0x1f: /* fgetman */ 5052 gen_helper_fgetman(tcg_env, cpu_dest, cpu_src); 5053 break; 5054 case 0x20: /* fdiv */ 5055 gen_helper_fdiv(tcg_env, cpu_dest, cpu_src, cpu_dest); 5056 break; 5057 case 0x60: /* fsdiv */ 5058 gen_helper_fsdiv(tcg_env, cpu_dest, cpu_src, cpu_dest); 5059 break; 5060 case 0x64: /* fddiv */ 5061 gen_helper_fddiv(tcg_env, cpu_dest, cpu_src, cpu_dest); 5062 break; 5063 case 0x21: /* fmod */ 5064 gen_helper_fmod(tcg_env, cpu_dest, cpu_src, cpu_dest); 5065 break; 5066 case 0x22: /* fadd */ 5067 gen_helper_fadd(tcg_env, cpu_dest, cpu_src, cpu_dest); 5068 break; 5069 case 0x62: /* fsadd */ 5070 gen_helper_fsadd(tcg_env, cpu_dest, cpu_src, cpu_dest); 5071 break; 5072 case 0x66: /* fdadd */ 5073 gen_helper_fdadd(tcg_env, cpu_dest, cpu_src, cpu_dest); 5074 break; 5075 case 0x23: /* fmul */ 5076 gen_helper_fmul(tcg_env, cpu_dest, cpu_src, cpu_dest); 5077 break; 5078 case 0x63: /* fsmul */ 5079 gen_helper_fsmul(tcg_env, cpu_dest, cpu_src, cpu_dest); 5080 break; 5081 case 0x67: /* fdmul */ 5082 gen_helper_fdmul(tcg_env, cpu_dest, cpu_src, cpu_dest); 5083 break; 5084 case 0x24: /* fsgldiv */ 5085 gen_helper_fsgldiv(tcg_env, cpu_dest, cpu_src, cpu_dest); 5086 break; 5087 case 0x25: /* frem */ 5088 gen_helper_frem(tcg_env, cpu_dest, cpu_src, cpu_dest); 5089 break; 5090 case 0x26: /* fscale */ 5091 gen_helper_fscale(tcg_env, cpu_dest, cpu_src, cpu_dest); 5092 break; 5093 case 0x27: /* fsglmul */ 5094 gen_helper_fsglmul(tcg_env, cpu_dest, cpu_src, cpu_dest); 5095 break; 5096 case 0x28: /* fsub */ 5097 gen_helper_fsub(tcg_env, cpu_dest, cpu_src, cpu_dest); 5098 break; 5099 case 0x68: /* fssub */ 5100 gen_helper_fssub(tcg_env, cpu_dest, cpu_src, cpu_dest); 5101 break; 5102 case 0x6c: /* fdsub */ 5103 gen_helper_fdsub(tcg_env, cpu_dest, cpu_src, cpu_dest); 5104 break; 5105 case 0x30: case 0x31: case 0x32: 5106 case 0x33: case 0x34: case 0x35: 5107 case 0x36: case 0x37: { 5108 TCGv_ptr cpu_dest2 = gen_fp_ptr(REG(ext, 0)); 5109 gen_helper_fsincos(tcg_env, cpu_dest, cpu_dest2, cpu_src); 5110 } 5111 break; 5112 case 0x38: /* fcmp */ 5113 gen_helper_fcmp(tcg_env, cpu_src, cpu_dest); 5114 return; 5115 case 0x3a: /* ftst */ 5116 gen_helper_ftst(tcg_env, cpu_src); 5117 return; 5118 default: 5119 goto undef; 5120 } 5121 gen_helper_ftst(tcg_env, cpu_dest); 5122 return; 5123 undef: 5124 /* FIXME: Is this right for offset addressing modes? */ 5125 s->pc -= 2; 5126 disas_undef_fpu(env, s, insn); 5127 } 5128 5129 static void gen_fcc_cond(DisasCompare *c, DisasContext *s, int cond) 5130 { 5131 TCGv fpsr; 5132 5133 c->v2 = tcg_constant_i32(0); 5134 /* TODO: Raise BSUN exception. */ 5135 fpsr = tcg_temp_new(); 5136 gen_load_fcr(s, fpsr, M68K_FPSR); 5137 switch (cond) { 5138 case 0: /* False */ 5139 case 16: /* Signaling False */ 5140 c->v1 = c->v2; 5141 c->tcond = TCG_COND_NEVER; 5142 break; 5143 case 1: /* EQual Z */ 5144 case 17: /* Signaling EQual Z */ 5145 c->v1 = tcg_temp_new(); 5146 tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_Z); 5147 c->tcond = TCG_COND_NE; 5148 break; 5149 case 2: /* Ordered Greater Than !(A || Z || N) */ 5150 case 18: /* Greater Than !(A || Z || N) */ 5151 c->v1 = tcg_temp_new(); 5152 tcg_gen_andi_i32(c->v1, fpsr, 5153 FPSR_CC_A | FPSR_CC_Z | FPSR_CC_N); 5154 c->tcond = TCG_COND_EQ; 5155 break; 5156 case 3: /* Ordered Greater than or Equal Z || !(A || N) */ 5157 case 19: /* Greater than or Equal Z || !(A || N) */ 5158 c->v1 = tcg_temp_new(); 5159 tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A); 5160 tcg_gen_shli_i32(c->v1, c->v1, ctz32(FPSR_CC_N) - ctz32(FPSR_CC_A)); 5161 tcg_gen_andi_i32(fpsr, fpsr, FPSR_CC_Z | FPSR_CC_N); 5162 tcg_gen_or_i32(c->v1, c->v1, fpsr); 5163 tcg_gen_xori_i32(c->v1, c->v1, FPSR_CC_N); 5164 c->tcond = TCG_COND_NE; 5165 break; 5166 case 4: /* Ordered Less Than !(!N || A || Z); */ 5167 case 20: /* Less Than !(!N || A || Z); */ 5168 c->v1 = tcg_temp_new(); 5169 tcg_gen_xori_i32(c->v1, fpsr, FPSR_CC_N); 5170 tcg_gen_andi_i32(c->v1, c->v1, FPSR_CC_N | FPSR_CC_A | FPSR_CC_Z); 5171 c->tcond = TCG_COND_EQ; 5172 break; 5173 case 5: /* Ordered Less than or Equal Z || (N && !A) */ 5174 case 21: /* Less than or Equal Z || (N && !A) */ 5175 c->v1 = tcg_temp_new(); 5176 tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A); 5177 tcg_gen_shli_i32(c->v1, c->v1, ctz32(FPSR_CC_N) - ctz32(FPSR_CC_A)); 5178 tcg_gen_andc_i32(c->v1, fpsr, c->v1); 5179 tcg_gen_andi_i32(c->v1, c->v1, FPSR_CC_Z | FPSR_CC_N); 5180 c->tcond = TCG_COND_NE; 5181 break; 5182 case 6: /* Ordered Greater or Less than !(A || Z) */ 5183 case 22: /* Greater or Less than !(A || Z) */ 5184 c->v1 = tcg_temp_new(); 5185 tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A | FPSR_CC_Z); 5186 c->tcond = TCG_COND_EQ; 5187 break; 5188 case 7: /* Ordered !A */ 5189 case 23: /* Greater, Less or Equal !A */ 5190 c->v1 = tcg_temp_new(); 5191 tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A); 5192 c->tcond = TCG_COND_EQ; 5193 break; 5194 case 8: /* Unordered A */ 5195 case 24: /* Not Greater, Less or Equal A */ 5196 c->v1 = tcg_temp_new(); 5197 tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A); 5198 c->tcond = TCG_COND_NE; 5199 break; 5200 case 9: /* Unordered or Equal A || Z */ 5201 case 25: /* Not Greater or Less then A || Z */ 5202 c->v1 = tcg_temp_new(); 5203 tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A | FPSR_CC_Z); 5204 c->tcond = TCG_COND_NE; 5205 break; 5206 case 10: /* Unordered or Greater Than A || !(N || Z)) */ 5207 case 26: /* Not Less or Equal A || !(N || Z)) */ 5208 c->v1 = tcg_temp_new(); 5209 tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_Z); 5210 tcg_gen_shli_i32(c->v1, c->v1, ctz32(FPSR_CC_N) - ctz32(FPSR_CC_Z)); 5211 tcg_gen_andi_i32(fpsr, fpsr, FPSR_CC_A | FPSR_CC_N); 5212 tcg_gen_or_i32(c->v1, c->v1, fpsr); 5213 tcg_gen_xori_i32(c->v1, c->v1, FPSR_CC_N); 5214 c->tcond = TCG_COND_NE; 5215 break; 5216 case 11: /* Unordered or Greater or Equal A || Z || !N */ 5217 case 27: /* Not Less Than A || Z || !N */ 5218 c->v1 = tcg_temp_new(); 5219 tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A | FPSR_CC_Z | FPSR_CC_N); 5220 tcg_gen_xori_i32(c->v1, c->v1, FPSR_CC_N); 5221 c->tcond = TCG_COND_NE; 5222 break; 5223 case 12: /* Unordered or Less Than A || (N && !Z) */ 5224 case 28: /* Not Greater than or Equal A || (N && !Z) */ 5225 c->v1 = tcg_temp_new(); 5226 tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_Z); 5227 tcg_gen_shli_i32(c->v1, c->v1, ctz32(FPSR_CC_N) - ctz32(FPSR_CC_Z)); 5228 tcg_gen_andc_i32(c->v1, fpsr, c->v1); 5229 tcg_gen_andi_i32(c->v1, c->v1, FPSR_CC_A | FPSR_CC_N); 5230 c->tcond = TCG_COND_NE; 5231 break; 5232 case 13: /* Unordered or Less or Equal A || Z || N */ 5233 case 29: /* Not Greater Than A || Z || N */ 5234 c->v1 = tcg_temp_new(); 5235 tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A | FPSR_CC_Z | FPSR_CC_N); 5236 c->tcond = TCG_COND_NE; 5237 break; 5238 case 14: /* Not Equal !Z */ 5239 case 30: /* Signaling Not Equal !Z */ 5240 c->v1 = tcg_temp_new(); 5241 tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_Z); 5242 c->tcond = TCG_COND_EQ; 5243 break; 5244 case 15: /* True */ 5245 case 31: /* Signaling True */ 5246 c->v1 = c->v2; 5247 c->tcond = TCG_COND_ALWAYS; 5248 break; 5249 } 5250 } 5251 5252 static void gen_fjmpcc(DisasContext *s, int cond, TCGLabel *l1) 5253 { 5254 DisasCompare c; 5255 5256 gen_fcc_cond(&c, s, cond); 5257 update_cc_op(s); 5258 tcg_gen_brcond_i32(c.tcond, c.v1, c.v2, l1); 5259 } 5260 5261 DISAS_INSN(fbcc) 5262 { 5263 uint32_t offset; 5264 uint32_t base; 5265 TCGLabel *l1; 5266 5267 base = s->pc; 5268 offset = (int16_t)read_im16(env, s); 5269 if (insn & (1 << 6)) { 5270 offset = (offset << 16) | read_im16(env, s); 5271 } 5272 5273 l1 = gen_new_label(); 5274 update_cc_op(s); 5275 gen_fjmpcc(s, insn & 0x3f, l1); 5276 gen_jmp_tb(s, 0, s->pc, s->base.pc_next); 5277 gen_set_label(l1); 5278 gen_jmp_tb(s, 1, base + offset, s->base.pc_next); 5279 } 5280 5281 DISAS_INSN(fscc) 5282 { 5283 DisasCompare c; 5284 int cond; 5285 TCGv tmp; 5286 uint16_t ext; 5287 5288 ext = read_im16(env, s); 5289 cond = ext & 0x3f; 5290 gen_fcc_cond(&c, s, cond); 5291 5292 tmp = tcg_temp_new(); 5293 tcg_gen_negsetcond_i32(c.tcond, tmp, c.v1, c.v2); 5294 5295 DEST_EA(env, insn, OS_BYTE, tmp, NULL); 5296 } 5297 5298 DISAS_INSN(ftrapcc) 5299 { 5300 DisasCompare c; 5301 uint16_t ext; 5302 int cond; 5303 5304 ext = read_im16(env, s); 5305 cond = ext & 0x3f; 5306 5307 /* Consume and discard the immediate operand. */ 5308 switch (extract32(insn, 0, 3)) { 5309 case 2: /* ftrapcc.w */ 5310 (void)read_im16(env, s); 5311 break; 5312 case 3: /* ftrapcc.l */ 5313 (void)read_im32(env, s); 5314 break; 5315 case 4: /* ftrapcc (no operand) */ 5316 break; 5317 default: 5318 /* ftrapcc registered with only valid opmodes */ 5319 g_assert_not_reached(); 5320 } 5321 5322 gen_fcc_cond(&c, s, cond); 5323 do_trapcc(s, &c); 5324 } 5325 5326 #if !defined(CONFIG_USER_ONLY) 5327 DISAS_INSN(frestore) 5328 { 5329 TCGv addr; 5330 5331 if (IS_USER(s)) { 5332 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE); 5333 return; 5334 } 5335 if (m68k_feature(s->env, M68K_FEATURE_M68040)) { 5336 SRC_EA(env, addr, OS_LONG, 0, NULL); 5337 /* FIXME: check the state frame */ 5338 } else { 5339 disas_undef(env, s, insn); 5340 } 5341 } 5342 5343 DISAS_INSN(fsave) 5344 { 5345 if (IS_USER(s)) { 5346 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE); 5347 return; 5348 } 5349 5350 if (m68k_feature(s->env, M68K_FEATURE_M68040)) { 5351 /* always write IDLE */ 5352 TCGv idle = tcg_constant_i32(0x41000000); 5353 DEST_EA(env, insn, OS_LONG, idle, NULL); 5354 } else { 5355 disas_undef(env, s, insn); 5356 } 5357 } 5358 #endif 5359 5360 static inline TCGv gen_mac_extract_word(DisasContext *s, TCGv val, int upper) 5361 { 5362 TCGv tmp = tcg_temp_new(); 5363 if (s->env->macsr & MACSR_FI) { 5364 if (upper) 5365 tcg_gen_andi_i32(tmp, val, 0xffff0000); 5366 else 5367 tcg_gen_shli_i32(tmp, val, 16); 5368 } else if (s->env->macsr & MACSR_SU) { 5369 if (upper) 5370 tcg_gen_sari_i32(tmp, val, 16); 5371 else 5372 tcg_gen_ext16s_i32(tmp, val); 5373 } else { 5374 if (upper) 5375 tcg_gen_shri_i32(tmp, val, 16); 5376 else 5377 tcg_gen_ext16u_i32(tmp, val); 5378 } 5379 return tmp; 5380 } 5381 5382 static void gen_mac_clear_flags(void) 5383 { 5384 tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR, 5385 ~(MACSR_V | MACSR_Z | MACSR_N | MACSR_EV)); 5386 } 5387 5388 DISAS_INSN(mac) 5389 { 5390 TCGv rx; 5391 TCGv ry; 5392 uint16_t ext; 5393 int acc; 5394 TCGv tmp; 5395 TCGv addr; 5396 TCGv loadval; 5397 int dual; 5398 TCGv saved_flags; 5399 5400 if (!s->done_mac) { 5401 s->mactmp = tcg_temp_new_i64(); 5402 s->done_mac = 1; 5403 } 5404 5405 ext = read_im16(env, s); 5406 5407 acc = ((insn >> 7) & 1) | ((ext >> 3) & 2); 5408 dual = ((insn & 0x30) != 0 && (ext & 3) != 0); 5409 if (dual && !m68k_feature(s->env, M68K_FEATURE_CF_EMAC_B)) { 5410 disas_undef(env, s, insn); 5411 return; 5412 } 5413 if (insn & 0x30) { 5414 /* MAC with load. */ 5415 tmp = gen_lea(env, s, insn, OS_LONG); 5416 addr = tcg_temp_new(); 5417 tcg_gen_and_i32(addr, tmp, QREG_MAC_MASK); 5418 /* 5419 * Load the value now to ensure correct exception behavior. 5420 * Perform writeback after reading the MAC inputs. 5421 */ 5422 loadval = gen_load(s, OS_LONG, addr, 0, IS_USER(s)); 5423 5424 acc ^= 1; 5425 rx = (ext & 0x8000) ? AREG(ext, 12) : DREG(insn, 12); 5426 ry = (ext & 8) ? AREG(ext, 0) : DREG(ext, 0); 5427 } else { 5428 loadval = addr = NULL_QREG; 5429 rx = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9); 5430 ry = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0); 5431 } 5432 5433 gen_mac_clear_flags(); 5434 #if 0 5435 l1 = -1; 5436 /* Disabled because conditional branches clobber temporary vars. */ 5437 if ((s->env->macsr & MACSR_OMC) != 0 && !dual) { 5438 /* Skip the multiply if we know we will ignore it. */ 5439 l1 = gen_new_label(); 5440 tmp = tcg_temp_new(); 5441 tcg_gen_andi_i32(tmp, QREG_MACSR, 1 << (acc + 8)); 5442 gen_op_jmp_nz32(tmp, l1); 5443 } 5444 #endif 5445 5446 if ((ext & 0x0800) == 0) { 5447 /* Word. */ 5448 rx = gen_mac_extract_word(s, rx, (ext & 0x80) != 0); 5449 ry = gen_mac_extract_word(s, ry, (ext & 0x40) != 0); 5450 } 5451 if (s->env->macsr & MACSR_FI) { 5452 gen_helper_macmulf(s->mactmp, tcg_env, rx, ry); 5453 } else { 5454 if (s->env->macsr & MACSR_SU) 5455 gen_helper_macmuls(s->mactmp, tcg_env, rx, ry); 5456 else 5457 gen_helper_macmulu(s->mactmp, tcg_env, rx, ry); 5458 switch ((ext >> 9) & 3) { 5459 case 1: 5460 tcg_gen_shli_i64(s->mactmp, s->mactmp, 1); 5461 break; 5462 case 3: 5463 tcg_gen_shri_i64(s->mactmp, s->mactmp, 1); 5464 break; 5465 } 5466 } 5467 5468 if (dual) { 5469 /* Save the overflow flag from the multiply. */ 5470 saved_flags = tcg_temp_new(); 5471 tcg_gen_mov_i32(saved_flags, QREG_MACSR); 5472 } else { 5473 saved_flags = NULL_QREG; 5474 } 5475 5476 #if 0 5477 /* Disabled because conditional branches clobber temporary vars. */ 5478 if ((s->env->macsr & MACSR_OMC) != 0 && dual) { 5479 /* Skip the accumulate if the value is already saturated. */ 5480 l1 = gen_new_label(); 5481 tmp = tcg_temp_new(); 5482 gen_op_and32(tmp, QREG_MACSR, tcg_constant_i32(MACSR_PAV0 << acc)); 5483 gen_op_jmp_nz32(tmp, l1); 5484 } 5485 #endif 5486 5487 if (insn & 0x100) 5488 tcg_gen_sub_i64(MACREG(acc), MACREG(acc), s->mactmp); 5489 else 5490 tcg_gen_add_i64(MACREG(acc), MACREG(acc), s->mactmp); 5491 5492 if (s->env->macsr & MACSR_FI) 5493 gen_helper_macsatf(tcg_env, tcg_constant_i32(acc)); 5494 else if (s->env->macsr & MACSR_SU) 5495 gen_helper_macsats(tcg_env, tcg_constant_i32(acc)); 5496 else 5497 gen_helper_macsatu(tcg_env, tcg_constant_i32(acc)); 5498 5499 #if 0 5500 /* Disabled because conditional branches clobber temporary vars. */ 5501 if (l1 != -1) 5502 gen_set_label(l1); 5503 #endif 5504 5505 if (dual) { 5506 /* Dual accumulate variant. */ 5507 acc = (ext >> 2) & 3; 5508 /* Restore the overflow flag from the multiplier. */ 5509 tcg_gen_mov_i32(QREG_MACSR, saved_flags); 5510 #if 0 5511 /* Disabled because conditional branches clobber temporary vars. */ 5512 if ((s->env->macsr & MACSR_OMC) != 0) { 5513 /* Skip the accumulate if the value is already saturated. */ 5514 l1 = gen_new_label(); 5515 tmp = tcg_temp_new(); 5516 gen_op_and32(tmp, QREG_MACSR, tcg_constant_i32(MACSR_PAV0 << acc)); 5517 gen_op_jmp_nz32(tmp, l1); 5518 } 5519 #endif 5520 if (ext & 2) 5521 tcg_gen_sub_i64(MACREG(acc), MACREG(acc), s->mactmp); 5522 else 5523 tcg_gen_add_i64(MACREG(acc), MACREG(acc), s->mactmp); 5524 if (s->env->macsr & MACSR_FI) 5525 gen_helper_macsatf(tcg_env, tcg_constant_i32(acc)); 5526 else if (s->env->macsr & MACSR_SU) 5527 gen_helper_macsats(tcg_env, tcg_constant_i32(acc)); 5528 else 5529 gen_helper_macsatu(tcg_env, tcg_constant_i32(acc)); 5530 #if 0 5531 /* Disabled because conditional branches clobber temporary vars. */ 5532 if (l1 != -1) 5533 gen_set_label(l1); 5534 #endif 5535 } 5536 gen_helper_mac_set_flags(tcg_env, tcg_constant_i32(acc)); 5537 5538 if (insn & 0x30) { 5539 TCGv rw; 5540 rw = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9); 5541 tcg_gen_mov_i32(rw, loadval); 5542 /* 5543 * FIXME: Should address writeback happen with the masked or 5544 * unmasked value? 5545 */ 5546 switch ((insn >> 3) & 7) { 5547 case 3: /* Post-increment. */ 5548 tcg_gen_addi_i32(AREG(insn, 0), addr, 4); 5549 break; 5550 case 4: /* Pre-decrement. */ 5551 tcg_gen_mov_i32(AREG(insn, 0), addr); 5552 } 5553 } 5554 } 5555 5556 DISAS_INSN(from_mac) 5557 { 5558 TCGv rx; 5559 TCGv_i64 acc; 5560 int accnum; 5561 5562 rx = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0); 5563 accnum = (insn >> 9) & 3; 5564 acc = MACREG(accnum); 5565 if (s->env->macsr & MACSR_FI) { 5566 gen_helper_get_macf(rx, tcg_env, acc); 5567 } else if ((s->env->macsr & MACSR_OMC) == 0) { 5568 tcg_gen_extrl_i64_i32(rx, acc); 5569 } else if (s->env->macsr & MACSR_SU) { 5570 gen_helper_get_macs(rx, acc); 5571 } else { 5572 gen_helper_get_macu(rx, acc); 5573 } 5574 if (insn & 0x40) { 5575 tcg_gen_movi_i64(acc, 0); 5576 tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR, ~(MACSR_PAV0 << accnum)); 5577 } 5578 } 5579 5580 DISAS_INSN(move_mac) 5581 { 5582 /* FIXME: This can be done without a helper. */ 5583 int src; 5584 TCGv dest; 5585 src = insn & 3; 5586 dest = tcg_constant_i32((insn >> 9) & 3); 5587 gen_helper_mac_move(tcg_env, dest, tcg_constant_i32(src)); 5588 gen_mac_clear_flags(); 5589 gen_helper_mac_set_flags(tcg_env, dest); 5590 } 5591 5592 DISAS_INSN(from_macsr) 5593 { 5594 TCGv reg; 5595 5596 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0); 5597 tcg_gen_mov_i32(reg, QREG_MACSR); 5598 } 5599 5600 DISAS_INSN(from_mask) 5601 { 5602 TCGv reg; 5603 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0); 5604 tcg_gen_mov_i32(reg, QREG_MAC_MASK); 5605 } 5606 5607 DISAS_INSN(from_mext) 5608 { 5609 TCGv reg; 5610 TCGv acc; 5611 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0); 5612 acc = tcg_constant_i32((insn & 0x400) ? 2 : 0); 5613 if (s->env->macsr & MACSR_FI) 5614 gen_helper_get_mac_extf(reg, tcg_env, acc); 5615 else 5616 gen_helper_get_mac_exti(reg, tcg_env, acc); 5617 } 5618 5619 DISAS_INSN(macsr_to_ccr) 5620 { 5621 TCGv tmp = tcg_temp_new(); 5622 5623 /* Note that X and C are always cleared. */ 5624 tcg_gen_andi_i32(tmp, QREG_MACSR, CCF_N | CCF_Z | CCF_V); 5625 gen_helper_set_ccr(tcg_env, tmp); 5626 set_cc_op(s, CC_OP_FLAGS); 5627 } 5628 5629 DISAS_INSN(to_mac) 5630 { 5631 TCGv_i64 acc; 5632 TCGv val; 5633 int accnum; 5634 accnum = (insn >> 9) & 3; 5635 acc = MACREG(accnum); 5636 SRC_EA(env, val, OS_LONG, 0, NULL); 5637 if (s->env->macsr & MACSR_FI) { 5638 tcg_gen_ext_i32_i64(acc, val); 5639 tcg_gen_shli_i64(acc, acc, 8); 5640 } else if (s->env->macsr & MACSR_SU) { 5641 tcg_gen_ext_i32_i64(acc, val); 5642 } else { 5643 tcg_gen_extu_i32_i64(acc, val); 5644 } 5645 tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR, ~(MACSR_PAV0 << accnum)); 5646 gen_mac_clear_flags(); 5647 gen_helper_mac_set_flags(tcg_env, tcg_constant_i32(accnum)); 5648 } 5649 5650 DISAS_INSN(to_macsr) 5651 { 5652 TCGv val; 5653 SRC_EA(env, val, OS_LONG, 0, NULL); 5654 gen_helper_set_macsr(tcg_env, val); 5655 gen_exit_tb(s); 5656 } 5657 5658 DISAS_INSN(to_mask) 5659 { 5660 TCGv val; 5661 SRC_EA(env, val, OS_LONG, 0, NULL); 5662 tcg_gen_ori_i32(QREG_MAC_MASK, val, 0xffff0000); 5663 } 5664 5665 DISAS_INSN(to_mext) 5666 { 5667 TCGv val; 5668 TCGv acc; 5669 SRC_EA(env, val, OS_LONG, 0, NULL); 5670 acc = tcg_constant_i32((insn & 0x400) ? 2 : 0); 5671 if (s->env->macsr & MACSR_FI) 5672 gen_helper_set_mac_extf(tcg_env, val, acc); 5673 else if (s->env->macsr & MACSR_SU) 5674 gen_helper_set_mac_exts(tcg_env, val, acc); 5675 else 5676 gen_helper_set_mac_extu(tcg_env, val, acc); 5677 } 5678 5679 static disas_proc opcode_table[65536]; 5680 5681 static void 5682 register_opcode (disas_proc proc, uint16_t opcode, uint16_t mask) 5683 { 5684 int i; 5685 int from; 5686 int to; 5687 5688 /* Sanity check. All set bits must be included in the mask. */ 5689 if (opcode & ~mask) { 5690 fprintf(stderr, 5691 "qemu internal error: bogus opcode definition %04x/%04x\n", 5692 opcode, mask); 5693 abort(); 5694 } 5695 /* 5696 * This could probably be cleverer. For now just optimize the case where 5697 * the top bits are known. 5698 */ 5699 /* Find the first zero bit in the mask. */ 5700 i = 0x8000; 5701 while ((i & mask) != 0) 5702 i >>= 1; 5703 /* Iterate over all combinations of this and lower bits. */ 5704 if (i == 0) 5705 i = 1; 5706 else 5707 i <<= 1; 5708 from = opcode & ~(i - 1); 5709 to = from + i; 5710 for (i = from; i < to; i++) { 5711 if ((i & mask) == opcode) 5712 opcode_table[i] = proc; 5713 } 5714 } 5715 5716 /* 5717 * Register m68k opcode handlers. Order is important. 5718 * Later insn override earlier ones. 5719 */ 5720 void register_m68k_insns (CPUM68KState *env) 5721 { 5722 /* 5723 * Build the opcode table only once to avoid 5724 * multithreading issues. 5725 */ 5726 if (opcode_table[0] != NULL) { 5727 return; 5728 } 5729 5730 /* 5731 * use BASE() for instruction available 5732 * for CF_ISA_A and M68000. 5733 */ 5734 #define BASE(name, opcode, mask) \ 5735 register_opcode(disas_##name, 0x##opcode, 0x##mask) 5736 #define INSN(name, opcode, mask, feature) do { \ 5737 if (m68k_feature(env, M68K_FEATURE_##feature)) \ 5738 BASE(name, opcode, mask); \ 5739 } while(0) 5740 BASE(undef, 0000, 0000); 5741 INSN(arith_im, 0080, fff8, CF_ISA_A); 5742 INSN(arith_im, 0000, ff00, M68K); 5743 INSN(chk2, 00c0, f9c0, CHK2); 5744 INSN(bitrev, 00c0, fff8, CF_ISA_APLUSC); 5745 BASE(bitop_reg, 0100, f1c0); 5746 BASE(bitop_reg, 0140, f1c0); 5747 BASE(bitop_reg, 0180, f1c0); 5748 BASE(bitop_reg, 01c0, f1c0); 5749 INSN(movep, 0108, f138, MOVEP); 5750 INSN(arith_im, 0280, fff8, CF_ISA_A); 5751 INSN(arith_im, 0200, ff00, M68K); 5752 INSN(undef, 02c0, ffc0, M68K); 5753 INSN(byterev, 02c0, fff8, CF_ISA_APLUSC); 5754 INSN(arith_im, 0480, fff8, CF_ISA_A); 5755 INSN(arith_im, 0400, ff00, M68K); 5756 INSN(undef, 04c0, ffc0, M68K); 5757 INSN(arith_im, 0600, ff00, M68K); 5758 INSN(undef, 06c0, ffc0, M68K); 5759 INSN(ff1, 04c0, fff8, CF_ISA_APLUSC); 5760 INSN(arith_im, 0680, fff8, CF_ISA_A); 5761 INSN(arith_im, 0c00, ff38, CF_ISA_A); 5762 INSN(arith_im, 0c00, ff00, M68K); 5763 BASE(bitop_im, 0800, ffc0); 5764 BASE(bitop_im, 0840, ffc0); 5765 BASE(bitop_im, 0880, ffc0); 5766 BASE(bitop_im, 08c0, ffc0); 5767 INSN(arith_im, 0a80, fff8, CF_ISA_A); 5768 INSN(arith_im, 0a00, ff00, M68K); 5769 #if !defined(CONFIG_USER_ONLY) 5770 INSN(moves, 0e00, ff00, M68K); 5771 #endif 5772 INSN(cas, 0ac0, ffc0, CAS); 5773 INSN(cas, 0cc0, ffc0, CAS); 5774 INSN(cas, 0ec0, ffc0, CAS); 5775 INSN(cas2w, 0cfc, ffff, CAS); 5776 INSN(cas2l, 0efc, ffff, CAS); 5777 BASE(move, 1000, f000); 5778 BASE(move, 2000, f000); 5779 BASE(move, 3000, f000); 5780 INSN(chk, 4000, f040, M68K); 5781 INSN(strldsr, 40e7, ffff, CF_ISA_APLUSC); 5782 INSN(negx, 4080, fff8, CF_ISA_A); 5783 INSN(negx, 4000, ff00, M68K); 5784 INSN(undef, 40c0, ffc0, M68K); 5785 INSN(move_from_sr, 40c0, fff8, CF_ISA_A); 5786 INSN(move_from_sr, 40c0, ffc0, M68K); 5787 BASE(lea, 41c0, f1c0); 5788 BASE(clr, 4200, ff00); 5789 BASE(undef, 42c0, ffc0); 5790 INSN(move_from_ccr, 42c0, fff8, CF_ISA_A); 5791 INSN(move_from_ccr, 42c0, ffc0, M68K); 5792 INSN(neg, 4480, fff8, CF_ISA_A); 5793 INSN(neg, 4400, ff00, M68K); 5794 INSN(undef, 44c0, ffc0, M68K); 5795 BASE(move_to_ccr, 44c0, ffc0); 5796 INSN(not, 4680, fff8, CF_ISA_A); 5797 INSN(not, 4600, ff00, M68K); 5798 #if !defined(CONFIG_USER_ONLY) 5799 BASE(move_to_sr, 46c0, ffc0); 5800 #endif 5801 INSN(nbcd, 4800, ffc0, M68K); 5802 INSN(linkl, 4808, fff8, M68K); 5803 BASE(pea, 4840, ffc0); 5804 BASE(swap, 4840, fff8); 5805 INSN(bkpt, 4848, fff8, BKPT); 5806 INSN(movem, 48d0, fbf8, CF_ISA_A); 5807 INSN(movem, 48e8, fbf8, CF_ISA_A); 5808 INSN(movem, 4880, fb80, M68K); 5809 BASE(ext, 4880, fff8); 5810 BASE(ext, 48c0, fff8); 5811 BASE(ext, 49c0, fff8); 5812 BASE(tst, 4a00, ff00); 5813 INSN(tas, 4ac0, ffc0, CF_ISA_B); 5814 INSN(tas, 4ac0, ffc0, M68K); 5815 #if !defined(CONFIG_USER_ONLY) 5816 INSN(halt, 4ac8, ffff, CF_ISA_A); 5817 INSN(halt, 4ac8, ffff, M68K); 5818 #endif 5819 INSN(pulse, 4acc, ffff, CF_ISA_A); 5820 BASE(illegal, 4afc, ffff); 5821 INSN(mull, 4c00, ffc0, CF_ISA_A); 5822 INSN(mull, 4c00, ffc0, LONG_MULDIV); 5823 INSN(divl, 4c40, ffc0, CF_ISA_A); 5824 INSN(divl, 4c40, ffc0, LONG_MULDIV); 5825 INSN(sats, 4c80, fff8, CF_ISA_B); 5826 BASE(trap, 4e40, fff0); 5827 BASE(link, 4e50, fff8); 5828 BASE(unlk, 4e58, fff8); 5829 #if !defined(CONFIG_USER_ONLY) 5830 INSN(move_to_usp, 4e60, fff8, USP); 5831 INSN(move_from_usp, 4e68, fff8, USP); 5832 INSN(reset, 4e70, ffff, M68K); 5833 BASE(stop, 4e72, ffff); 5834 BASE(rte, 4e73, ffff); 5835 INSN(cf_movec, 4e7b, ffff, CF_ISA_A); 5836 INSN(m68k_movec, 4e7a, fffe, MOVEC); 5837 #endif 5838 BASE(nop, 4e71, ffff); 5839 INSN(rtd, 4e74, ffff, RTD); 5840 BASE(rts, 4e75, ffff); 5841 INSN(trapv, 4e76, ffff, M68K); 5842 INSN(rtr, 4e77, ffff, M68K); 5843 BASE(jump, 4e80, ffc0); 5844 BASE(jump, 4ec0, ffc0); 5845 INSN(addsubq, 5000, f080, M68K); 5846 BASE(addsubq, 5080, f0c0); 5847 INSN(scc, 50c0, f0f8, CF_ISA_A); /* Scc.B Dx */ 5848 INSN(scc, 50c0, f0c0, M68K); /* Scc.B <EA> */ 5849 INSN(dbcc, 50c8, f0f8, M68K); 5850 INSN(trapcc, 50fa, f0fe, TRAPCC); /* opmode 010, 011 */ 5851 INSN(trapcc, 50fc, f0ff, TRAPCC); /* opmode 100 */ 5852 INSN(trapcc, 51fa, fffe, CF_ISA_A); /* TPF (trapf) opmode 010, 011 */ 5853 INSN(trapcc, 51fc, ffff, CF_ISA_A); /* TPF (trapf) opmode 100 */ 5854 5855 /* Branch instructions. */ 5856 BASE(branch, 6000, f000); 5857 /* Disable long branch instructions, then add back the ones we want. */ 5858 BASE(undef, 60ff, f0ff); /* All long branches. */ 5859 INSN(branch, 60ff, f0ff, CF_ISA_B); 5860 INSN(undef, 60ff, ffff, CF_ISA_B); /* bra.l */ 5861 INSN(branch, 60ff, ffff, BRAL); 5862 INSN(branch, 60ff, f0ff, BCCL); 5863 5864 BASE(moveq, 7000, f100); 5865 INSN(mvzs, 7100, f100, CF_ISA_B); 5866 BASE(or, 8000, f000); 5867 BASE(divw, 80c0, f0c0); 5868 INSN(sbcd_reg, 8100, f1f8, M68K); 5869 INSN(sbcd_mem, 8108, f1f8, M68K); 5870 BASE(addsub, 9000, f000); 5871 INSN(undef, 90c0, f0c0, CF_ISA_A); 5872 INSN(subx_reg, 9180, f1f8, CF_ISA_A); 5873 INSN(subx_reg, 9100, f138, M68K); 5874 INSN(subx_mem, 9108, f138, M68K); 5875 INSN(suba, 91c0, f1c0, CF_ISA_A); 5876 INSN(suba, 90c0, f0c0, M68K); 5877 5878 BASE(undef_mac, a000, f000); 5879 INSN(mac, a000, f100, CF_EMAC); 5880 INSN(from_mac, a180, f9b0, CF_EMAC); 5881 INSN(move_mac, a110, f9fc, CF_EMAC); 5882 INSN(from_macsr,a980, f9f0, CF_EMAC); 5883 INSN(from_mask, ad80, fff0, CF_EMAC); 5884 INSN(from_mext, ab80, fbf0, CF_EMAC); 5885 INSN(macsr_to_ccr, a9c0, ffff, CF_EMAC); 5886 INSN(to_mac, a100, f9c0, CF_EMAC); 5887 INSN(to_macsr, a900, ffc0, CF_EMAC); 5888 INSN(to_mext, ab00, fbc0, CF_EMAC); 5889 INSN(to_mask, ad00, ffc0, CF_EMAC); 5890 5891 INSN(mov3q, a140, f1c0, CF_ISA_B); 5892 INSN(cmp, b000, f1c0, CF_ISA_B); /* cmp.b */ 5893 INSN(cmp, b040, f1c0, CF_ISA_B); /* cmp.w */ 5894 INSN(cmpa, b0c0, f1c0, CF_ISA_B); /* cmpa.w */ 5895 INSN(cmp, b080, f1c0, CF_ISA_A); 5896 INSN(cmpa, b1c0, f1c0, CF_ISA_A); 5897 INSN(cmp, b000, f100, M68K); 5898 INSN(eor, b100, f100, M68K); 5899 INSN(cmpm, b108, f138, M68K); 5900 INSN(cmpa, b0c0, f0c0, M68K); 5901 INSN(eor, b180, f1c0, CF_ISA_A); 5902 BASE(and, c000, f000); 5903 INSN(exg_dd, c140, f1f8, M68K); 5904 INSN(exg_aa, c148, f1f8, M68K); 5905 INSN(exg_da, c188, f1f8, M68K); 5906 BASE(mulw, c0c0, f0c0); 5907 INSN(abcd_reg, c100, f1f8, M68K); 5908 INSN(abcd_mem, c108, f1f8, M68K); 5909 BASE(addsub, d000, f000); 5910 INSN(undef, d0c0, f0c0, CF_ISA_A); 5911 INSN(addx_reg, d180, f1f8, CF_ISA_A); 5912 INSN(addx_reg, d100, f138, M68K); 5913 INSN(addx_mem, d108, f138, M68K); 5914 INSN(adda, d1c0, f1c0, CF_ISA_A); 5915 INSN(adda, d0c0, f0c0, M68K); 5916 INSN(shift_im, e080, f0f0, CF_ISA_A); 5917 INSN(shift_reg, e0a0, f0f0, CF_ISA_A); 5918 INSN(shift8_im, e000, f0f0, M68K); 5919 INSN(shift16_im, e040, f0f0, M68K); 5920 INSN(shift_im, e080, f0f0, M68K); 5921 INSN(shift8_reg, e020, f0f0, M68K); 5922 INSN(shift16_reg, e060, f0f0, M68K); 5923 INSN(shift_reg, e0a0, f0f0, M68K); 5924 INSN(shift_mem, e0c0, fcc0, M68K); 5925 INSN(rotate_im, e090, f0f0, M68K); 5926 INSN(rotate8_im, e010, f0f0, M68K); 5927 INSN(rotate16_im, e050, f0f0, M68K); 5928 INSN(rotate_reg, e0b0, f0f0, M68K); 5929 INSN(rotate8_reg, e030, f0f0, M68K); 5930 INSN(rotate16_reg, e070, f0f0, M68K); 5931 INSN(rotate_mem, e4c0, fcc0, M68K); 5932 INSN(bfext_mem, e9c0, fdc0, BITFIELD); /* bfextu & bfexts */ 5933 INSN(bfext_reg, e9c0, fdf8, BITFIELD); 5934 INSN(bfins_mem, efc0, ffc0, BITFIELD); 5935 INSN(bfins_reg, efc0, fff8, BITFIELD); 5936 INSN(bfop_mem, eac0, ffc0, BITFIELD); /* bfchg */ 5937 INSN(bfop_reg, eac0, fff8, BITFIELD); /* bfchg */ 5938 INSN(bfop_mem, ecc0, ffc0, BITFIELD); /* bfclr */ 5939 INSN(bfop_reg, ecc0, fff8, BITFIELD); /* bfclr */ 5940 INSN(bfop_mem, edc0, ffc0, BITFIELD); /* bfffo */ 5941 INSN(bfop_reg, edc0, fff8, BITFIELD); /* bfffo */ 5942 INSN(bfop_mem, eec0, ffc0, BITFIELD); /* bfset */ 5943 INSN(bfop_reg, eec0, fff8, BITFIELD); /* bfset */ 5944 INSN(bfop_mem, e8c0, ffc0, BITFIELD); /* bftst */ 5945 INSN(bfop_reg, e8c0, fff8, BITFIELD); /* bftst */ 5946 BASE(undef_fpu, f000, f000); 5947 INSN(fpu, f200, ffc0, CF_FPU); 5948 INSN(fbcc, f280, ffc0, CF_FPU); 5949 INSN(fpu, f200, ffc0, FPU); 5950 INSN(fscc, f240, ffc0, FPU); 5951 INSN(ftrapcc, f27a, fffe, FPU); /* opmode 010, 011 */ 5952 INSN(ftrapcc, f27c, ffff, FPU); /* opmode 100 */ 5953 INSN(fbcc, f280, ff80, FPU); 5954 #if !defined(CONFIG_USER_ONLY) 5955 INSN(frestore, f340, ffc0, CF_FPU); 5956 INSN(fsave, f300, ffc0, CF_FPU); 5957 INSN(frestore, f340, ffc0, FPU); 5958 INSN(fsave, f300, ffc0, FPU); 5959 INSN(intouch, f340, ffc0, CF_ISA_A); 5960 INSN(cpushl, f428, ff38, CF_ISA_A); 5961 INSN(cpush, f420, ff20, M68040); 5962 INSN(cinv, f400, ff20, M68040); 5963 INSN(pflush, f500, ffe0, M68040); 5964 INSN(ptest, f548, ffd8, M68040); 5965 INSN(wddata, fb00, ff00, CF_ISA_A); 5966 INSN(wdebug, fbc0, ffc0, CF_ISA_A); 5967 #endif 5968 INSN(move16_mem, f600, ffe0, M68040); 5969 INSN(move16_reg, f620, fff8, M68040); 5970 #undef INSN 5971 } 5972 5973 static void m68k_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cpu) 5974 { 5975 DisasContext *dc = container_of(dcbase, DisasContext, base); 5976 CPUM68KState *env = cpu_env(cpu); 5977 5978 dc->env = env; 5979 dc->pc = dc->base.pc_first; 5980 /* This value will always be filled in properly before m68k_tr_tb_stop. */ 5981 dc->pc_prev = 0xdeadbeef; 5982 dc->cc_op = CC_OP_DYNAMIC; 5983 dc->cc_op_synced = 1; 5984 dc->done_mac = 0; 5985 dc->writeback_mask = 0; 5986 5987 dc->ss_active = (M68K_SR_TRACE(env->sr) == M68K_SR_TRACE_ANY_INS); 5988 /* If architectural single step active, limit to 1 */ 5989 if (dc->ss_active) { 5990 dc->base.max_insns = 1; 5991 } 5992 } 5993 5994 static void m68k_tr_tb_start(DisasContextBase *dcbase, CPUState *cpu) 5995 { 5996 } 5997 5998 static void m68k_tr_insn_start(DisasContextBase *dcbase, CPUState *cpu) 5999 { 6000 DisasContext *dc = container_of(dcbase, DisasContext, base); 6001 tcg_gen_insn_start(dc->base.pc_next, dc->cc_op); 6002 } 6003 6004 static void m68k_tr_translate_insn(DisasContextBase *dcbase, CPUState *cpu) 6005 { 6006 DisasContext *dc = container_of(dcbase, DisasContext, base); 6007 CPUM68KState *env = cpu_env(cpu); 6008 uint16_t insn = read_im16(env, dc); 6009 6010 opcode_table[insn](env, dc, insn); 6011 do_writebacks(dc); 6012 6013 dc->pc_prev = dc->base.pc_next; 6014 dc->base.pc_next = dc->pc; 6015 6016 if (dc->base.is_jmp == DISAS_NEXT) { 6017 /* 6018 * Stop translation when the next insn might touch a new page. 6019 * This ensures that prefetch aborts at the right place. 6020 * 6021 * We cannot determine the size of the next insn without 6022 * completely decoding it. However, the maximum insn size 6023 * is 32 bytes, so end if we do not have that much remaining. 6024 * This may produce several small TBs at the end of each page, 6025 * but they will all be linked with goto_tb. 6026 * 6027 * ??? ColdFire maximum is 4 bytes; MC68000's maximum is also 6028 * smaller than MC68020's. 6029 */ 6030 target_ulong start_page_offset 6031 = dc->pc - (dc->base.pc_first & TARGET_PAGE_MASK); 6032 6033 if (start_page_offset >= TARGET_PAGE_SIZE - 32) { 6034 dc->base.is_jmp = DISAS_TOO_MANY; 6035 } 6036 } 6037 } 6038 6039 static void m68k_tr_tb_stop(DisasContextBase *dcbase, CPUState *cpu) 6040 { 6041 DisasContext *dc = container_of(dcbase, DisasContext, base); 6042 6043 switch (dc->base.is_jmp) { 6044 case DISAS_NORETURN: 6045 break; 6046 case DISAS_TOO_MANY: 6047 update_cc_op(dc); 6048 gen_jmp_tb(dc, 0, dc->pc, dc->pc_prev); 6049 break; 6050 case DISAS_JUMP: 6051 /* We updated CC_OP and PC in gen_jmp/gen_jmp_im. */ 6052 if (dc->ss_active) { 6053 gen_raise_exception_format2(dc, EXCP_TRACE, dc->pc_prev); 6054 } else { 6055 tcg_gen_lookup_and_goto_ptr(); 6056 } 6057 break; 6058 case DISAS_EXIT: 6059 /* 6060 * We updated CC_OP and PC in gen_exit_tb, but also modified 6061 * other state that may require returning to the main loop. 6062 */ 6063 if (dc->ss_active) { 6064 gen_raise_exception_format2(dc, EXCP_TRACE, dc->pc_prev); 6065 } else { 6066 tcg_gen_exit_tb(NULL, 0); 6067 } 6068 break; 6069 default: 6070 g_assert_not_reached(); 6071 } 6072 } 6073 6074 static void m68k_tr_disas_log(const DisasContextBase *dcbase, 6075 CPUState *cpu, FILE *logfile) 6076 { 6077 fprintf(logfile, "IN: %s\n", lookup_symbol(dcbase->pc_first)); 6078 target_disas(logfile, cpu, dcbase->pc_first, dcbase->tb->size); 6079 } 6080 6081 static const TranslatorOps m68k_tr_ops = { 6082 .init_disas_context = m68k_tr_init_disas_context, 6083 .tb_start = m68k_tr_tb_start, 6084 .insn_start = m68k_tr_insn_start, 6085 .translate_insn = m68k_tr_translate_insn, 6086 .tb_stop = m68k_tr_tb_stop, 6087 .disas_log = m68k_tr_disas_log, 6088 }; 6089 6090 void gen_intermediate_code(CPUState *cpu, TranslationBlock *tb, int *max_insns, 6091 target_ulong pc, void *host_pc) 6092 { 6093 DisasContext dc; 6094 translator_loop(cpu, tb, max_insns, pc, host_pc, &m68k_tr_ops, &dc.base); 6095 } 6096 6097 static double floatx80_to_double(CPUM68KState *env, uint16_t high, uint64_t low) 6098 { 6099 floatx80 a = { .high = high, .low = low }; 6100 union { 6101 float64 f64; 6102 double d; 6103 } u; 6104 6105 u.f64 = floatx80_to_float64(a, &env->fp_status); 6106 return u.d; 6107 } 6108 6109 void m68k_cpu_dump_state(CPUState *cs, FILE *f, int flags) 6110 { 6111 M68kCPU *cpu = M68K_CPU(cs); 6112 CPUM68KState *env = &cpu->env; 6113 int i; 6114 uint16_t sr; 6115 for (i = 0; i < 8; i++) { 6116 qemu_fprintf(f, "D%d = %08x A%d = %08x " 6117 "F%d = %04x %016"PRIx64" (%12g)\n", 6118 i, env->dregs[i], i, env->aregs[i], 6119 i, env->fregs[i].l.upper, env->fregs[i].l.lower, 6120 floatx80_to_double(env, env->fregs[i].l.upper, 6121 env->fregs[i].l.lower)); 6122 } 6123 qemu_fprintf(f, "PC = %08x ", env->pc); 6124 sr = env->sr | cpu_m68k_get_ccr(env); 6125 qemu_fprintf(f, "SR = %04x T:%x I:%x %c%c %c%c%c%c%c\n", 6126 sr, (sr & SR_T) >> SR_T_SHIFT, (sr & SR_I) >> SR_I_SHIFT, 6127 (sr & SR_S) ? 'S' : 'U', (sr & SR_M) ? '%' : 'I', 6128 (sr & CCF_X) ? 'X' : '-', (sr & CCF_N) ? 'N' : '-', 6129 (sr & CCF_Z) ? 'Z' : '-', (sr & CCF_V) ? 'V' : '-', 6130 (sr & CCF_C) ? 'C' : '-'); 6131 qemu_fprintf(f, "FPSR = %08x %c%c%c%c ", env->fpsr, 6132 (env->fpsr & FPSR_CC_A) ? 'A' : '-', 6133 (env->fpsr & FPSR_CC_I) ? 'I' : '-', 6134 (env->fpsr & FPSR_CC_Z) ? 'Z' : '-', 6135 (env->fpsr & FPSR_CC_N) ? 'N' : '-'); 6136 qemu_fprintf(f, "\n " 6137 "FPCR = %04x ", env->fpcr); 6138 switch (env->fpcr & FPCR_PREC_MASK) { 6139 case FPCR_PREC_X: 6140 qemu_fprintf(f, "X "); 6141 break; 6142 case FPCR_PREC_S: 6143 qemu_fprintf(f, "S "); 6144 break; 6145 case FPCR_PREC_D: 6146 qemu_fprintf(f, "D "); 6147 break; 6148 } 6149 switch (env->fpcr & FPCR_RND_MASK) { 6150 case FPCR_RND_N: 6151 qemu_fprintf(f, "RN "); 6152 break; 6153 case FPCR_RND_Z: 6154 qemu_fprintf(f, "RZ "); 6155 break; 6156 case FPCR_RND_M: 6157 qemu_fprintf(f, "RM "); 6158 break; 6159 case FPCR_RND_P: 6160 qemu_fprintf(f, "RP "); 6161 break; 6162 } 6163 qemu_fprintf(f, "\n"); 6164 #ifndef CONFIG_USER_ONLY 6165 qemu_fprintf(f, "%sA7(MSP) = %08x %sA7(USP) = %08x %sA7(ISP) = %08x\n", 6166 env->current_sp == M68K_SSP ? "->" : " ", env->sp[M68K_SSP], 6167 env->current_sp == M68K_USP ? "->" : " ", env->sp[M68K_USP], 6168 env->current_sp == M68K_ISP ? "->" : " ", env->sp[M68K_ISP]); 6169 qemu_fprintf(f, "VBR = 0x%08x\n", env->vbr); 6170 qemu_fprintf(f, "SFC = %x DFC %x\n", env->sfc, env->dfc); 6171 qemu_fprintf(f, "SSW %08x TCR %08x URP %08x SRP %08x\n", 6172 env->mmu.ssw, env->mmu.tcr, env->mmu.urp, env->mmu.srp); 6173 qemu_fprintf(f, "DTTR0/1: %08x/%08x ITTR0/1: %08x/%08x\n", 6174 env->mmu.ttr[M68K_DTTR0], env->mmu.ttr[M68K_DTTR1], 6175 env->mmu.ttr[M68K_ITTR0], env->mmu.ttr[M68K_ITTR1]); 6176 qemu_fprintf(f, "MMUSR %08x, fault at %08x\n", 6177 env->mmu.mmusr, env->mmu.ar); 6178 #endif /* !CONFIG_USER_ONLY */ 6179 } 6180