1/* SPDX-License-Identifier: GPL-2.0 */ 2/* U3memcpy.S: UltraSparc-III optimized memcpy. 3 * 4 * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com) 5 */ 6 7#ifdef __KERNEL__ 8#include <linux/linkage.h> 9#include <asm/visasm.h> 10#include <asm/asi.h> 11#define GLOBAL_SPARE %g7 12#else 13#define ASI_BLK_P 0xf0 14#define FPRS_FEF 0x04 15#ifdef MEMCPY_DEBUG 16#define VISEntryHalf rd %fprs, %o5; wr %g0, FPRS_FEF, %fprs; \ 17 clr %g1; clr %g2; clr %g3; subcc %g0, %g0, %g0; 18#define VISExitHalf and %o5, FPRS_FEF, %o5; wr %o5, 0x0, %fprs 19#else 20#define VISEntryHalf rd %fprs, %o5; wr %g0, FPRS_FEF, %fprs 21#define VISExitHalf and %o5, FPRS_FEF, %o5; wr %o5, 0x0, %fprs 22#endif 23#define GLOBAL_SPARE %g5 24#endif 25 26#ifndef EX_LD 27#define EX_LD(x,y) x 28#endif 29#ifndef EX_LD_FP 30#define EX_LD_FP(x,y) x 31#endif 32 33#ifndef EX_ST 34#define EX_ST(x,y) x 35#endif 36#ifndef EX_ST_FP 37#define EX_ST_FP(x,y) x 38#endif 39 40#ifndef LOAD 41#define LOAD(type,addr,dest) type [addr], dest 42#endif 43 44#ifndef STORE 45#define STORE(type,src,addr) type src, [addr] 46#endif 47 48#ifndef STORE_BLK 49#define STORE_BLK(src,addr) stda src, [addr] ASI_BLK_P 50#endif 51 52#ifndef FUNC_NAME 53#define FUNC_NAME U3memcpy 54#endif 55 56#ifndef PREAMBLE 57#define PREAMBLE 58#endif 59 60#ifndef XCC 61#define XCC xcc 62#endif 63 64 .register %g2,#scratch 65 .register %g3,#scratch 66 67 /* Special/non-trivial issues of this code: 68 * 69 * 1) %o5 is preserved from VISEntryHalf to VISExitHalf 70 * 2) Only low 32 FPU registers are used so that only the 71 * lower half of the FPU register set is dirtied by this 72 * code. This is especially important in the kernel. 73 * 3) This code never prefetches cachelines past the end 74 * of the source buffer. 75 */ 76 77 .text 78#ifndef EX_RETVAL 79#define EX_RETVAL(x) x 80__restore_fp: 81 VISExitHalf 82 retl 83 nop 84ENTRY(U3_retl_o2_plus_g2_plus_g1_plus_1_fp) 85 add %g1, 1, %g1 86 add %g2, %g1, %g2 87 ba,pt %xcc, __restore_fp 88 add %o2, %g2, %o0 89ENDPROC(U3_retl_o2_plus_g2_plus_g1_plus_1_fp) 90ENTRY(U3_retl_o2_plus_g2_fp) 91 ba,pt %xcc, __restore_fp 92 add %o2, %g2, %o0 93ENDPROC(U3_retl_o2_plus_g2_fp) 94ENTRY(U3_retl_o2_plus_g2_plus_8_fp) 95 add %g2, 8, %g2 96 ba,pt %xcc, __restore_fp 97 add %o2, %g2, %o0 98ENDPROC(U3_retl_o2_plus_g2_plus_8_fp) 99ENTRY(U3_retl_o2) 100 retl 101 mov %o2, %o0 102ENDPROC(U3_retl_o2) 103ENTRY(U3_retl_o2_plus_1) 104 retl 105 add %o2, 1, %o0 106ENDPROC(U3_retl_o2_plus_1) 107ENTRY(U3_retl_o2_plus_4) 108 retl 109 add %o2, 4, %o0 110ENDPROC(U3_retl_o2_plus_4) 111ENTRY(U3_retl_o2_plus_8) 112 retl 113 add %o2, 8, %o0 114ENDPROC(U3_retl_o2_plus_8) 115ENTRY(U3_retl_o2_plus_g1_plus_1) 116 add %g1, 1, %g1 117 retl 118 add %o2, %g1, %o0 119ENDPROC(U3_retl_o2_plus_g1_plus_1) 120ENTRY(U3_retl_o2_fp) 121 ba,pt %xcc, __restore_fp 122 mov %o2, %o0 123ENDPROC(U3_retl_o2_fp) 124ENTRY(U3_retl_o2_plus_o3_sll_6_plus_0x80_fp) 125 sll %o3, 6, %o3 126 add %o3, 0x80, %o3 127 ba,pt %xcc, __restore_fp 128 add %o2, %o3, %o0 129ENDPROC(U3_retl_o2_plus_o3_sll_6_plus_0x80_fp) 130ENTRY(U3_retl_o2_plus_o3_sll_6_plus_0x40_fp) 131 sll %o3, 6, %o3 132 add %o3, 0x40, %o3 133 ba,pt %xcc, __restore_fp 134 add %o2, %o3, %o0 135ENDPROC(U3_retl_o2_plus_o3_sll_6_plus_0x40_fp) 136ENTRY(U3_retl_o2_plus_GS_plus_0x10) 137 add GLOBAL_SPARE, 0x10, GLOBAL_SPARE 138 retl 139 add %o2, GLOBAL_SPARE, %o0 140ENDPROC(U3_retl_o2_plus_GS_plus_0x10) 141ENTRY(U3_retl_o2_plus_GS_plus_0x08) 142 add GLOBAL_SPARE, 0x08, GLOBAL_SPARE 143 retl 144 add %o2, GLOBAL_SPARE, %o0 145ENDPROC(U3_retl_o2_plus_GS_plus_0x08) 146ENTRY(U3_retl_o2_and_7_plus_GS) 147 and %o2, 7, %o2 148 retl 149 add %o2, GLOBAL_SPARE, %o0 150ENDPROC(U3_retl_o2_and_7_plus_GS) 151ENTRY(U3_retl_o2_and_7_plus_GS_plus_8) 152 add GLOBAL_SPARE, 8, GLOBAL_SPARE 153 and %o2, 7, %o2 154 retl 155 add %o2, GLOBAL_SPARE, %o0 156ENDPROC(U3_retl_o2_and_7_plus_GS_plus_8) 157#endif 158 159 .align 64 160 161 /* The cheetah's flexible spine, oversized liver, enlarged heart, 162 * slender muscular body, and claws make it the swiftest hunter 163 * in Africa and the fastest animal on land. Can reach speeds 164 * of up to 2.4GB per second. 165 */ 166 167 .globl FUNC_NAME 168 .type FUNC_NAME,#function 169FUNC_NAME: /* %o0=dst, %o1=src, %o2=len */ 170 srlx %o2, 31, %g2 171 cmp %g2, 0 172 173 /* software trap 5 "Range Check" if dst >= 0x80000000 */ 174 tne %xcc, 5 175 PREAMBLE 176 mov %o0, %o4 177 178 /* if len == 0 */ 179 cmp %o2, 0 180 be,pn %XCC, end_return 181 or %o0, %o1, %o3 182 183 /* if len < 16 */ 184 cmp %o2, 16 185 blu,a,pn %XCC, less_than_16 186 or %o3, %o2, %o3 187 188 /* if len < 192 */ 189 cmp %o2, (3 * 64) 190 blu,pt %XCC, less_than_192 191 andcc %o3, 0x7, %g0 192 193 /* Clobbers o5/g1/g2/g3/g7/icc/xcc. We must preserve 194 * o5 from here until we hit VISExitHalf. 195 */ 196 VISEntryHalf 197 198 /* Is 'dst' already aligned on an 64-byte boundary? */ 199 andcc %o0, 0x3f, %g2 200 be,pt %XCC, 2f 201 202 /* Compute abs((dst & 0x3f) - 0x40) into %g2. This is the number 203 * of bytes to copy to make 'dst' 64-byte aligned. We pre- 204 * subtract this from 'len'. 205 */ 206 sub %o0, %o1, GLOBAL_SPARE 207 sub %g2, 0x40, %g2 208 sub %g0, %g2, %g2 209 sub %o2, %g2, %o2 210 andcc %g2, 0x7, %g1 211 be,pt %icc, 2f 212 and %g2, 0x38, %g2 213 2141: subcc %g1, 0x1, %g1 215 EX_LD_FP(LOAD(ldub, %o1 + 0x00, %o3), U3_retl_o2_plus_g2_plus_g1_plus_1) 216 EX_ST_FP(STORE(stb, %o3, %o1 + GLOBAL_SPARE), U3_retl_o2_plus_g2_plus_g1_plus_1) 217 bgu,pt %XCC, 1b 218 add %o1, 0x1, %o1 219 220 add %o1, GLOBAL_SPARE, %o0 221 2222: cmp %g2, 0x0 223 and %o1, 0x7, %g1 224 be,pt %icc, 3f 225 alignaddr %o1, %g0, %o1 226 227 EX_LD_FP(LOAD(ldd, %o1, %f4), U3_retl_o2_plus_g2) 2281: EX_LD_FP(LOAD(ldd, %o1 + 0x8, %f6), U3_retl_o2_plus_g2) 229 add %o1, 0x8, %o1 230 subcc %g2, 0x8, %g2 231 faligndata %f4, %f6, %f0 232 EX_ST_FP(STORE(std, %f0, %o0), U3_retl_o2_plus_g2_plus_8) 233 be,pn %icc, 3f 234 add %o0, 0x8, %o0 235 236 EX_LD_FP(LOAD(ldd, %o1 + 0x8, %f4), U3_retl_o2_plus_g2) 237 add %o1, 0x8, %o1 238 subcc %g2, 0x8, %g2 239 faligndata %f6, %f4, %f2 240 EX_ST_FP(STORE(std, %f2, %o0), U3_retl_o2_plus_g2_plus_8) 241 bne,pt %icc, 1b 242 add %o0, 0x8, %o0 243 2443: LOAD(prefetch, %o1 + 0x000, #one_read) 245 LOAD(prefetch, %o1 + 0x040, #one_read) 246 andn %o2, (0x40 - 1), GLOBAL_SPARE 247 LOAD(prefetch, %o1 + 0x080, #one_read) 248 LOAD(prefetch, %o1 + 0x0c0, #one_read) 249 LOAD(prefetch, %o1 + 0x100, #one_read) 250 EX_LD_FP(LOAD(ldd, %o1 + 0x000, %f0), U3_retl_o2) 251 LOAD(prefetch, %o1 + 0x140, #one_read) 252 EX_LD_FP(LOAD(ldd, %o1 + 0x008, %f2), U3_retl_o2) 253 LOAD(prefetch, %o1 + 0x180, #one_read) 254 EX_LD_FP(LOAD(ldd, %o1 + 0x010, %f4), U3_retl_o2) 255 LOAD(prefetch, %o1 + 0x1c0, #one_read) 256 faligndata %f0, %f2, %f16 257 EX_LD_FP(LOAD(ldd, %o1 + 0x018, %f6), U3_retl_o2) 258 faligndata %f2, %f4, %f18 259 EX_LD_FP(LOAD(ldd, %o1 + 0x020, %f8), U3_retl_o2) 260 faligndata %f4, %f6, %f20 261 EX_LD_FP(LOAD(ldd, %o1 + 0x028, %f10), U3_retl_o2) 262 faligndata %f6, %f8, %f22 263 264 EX_LD_FP(LOAD(ldd, %o1 + 0x030, %f12), U3_retl_o2) 265 faligndata %f8, %f10, %f24 266 EX_LD_FP(LOAD(ldd, %o1 + 0x038, %f14), U3_retl_o2) 267 faligndata %f10, %f12, %f26 268 EX_LD_FP(LOAD(ldd, %o1 + 0x040, %f0), U3_retl_o2) 269 270 subcc GLOBAL_SPARE, 0x80, GLOBAL_SPARE 271 add %o1, 0x40, %o1 272 bgu,pt %XCC, 1f 273 srl GLOBAL_SPARE, 6, %o3 274 ba,pt %xcc, 2f 275 nop 276 277 .align 64 2781: 279 EX_LD_FP(LOAD(ldd, %o1 + 0x008, %f2), U3_retl_o2_plus_o3_sll_6_plus_0x80) 280 faligndata %f12, %f14, %f28 281 EX_LD_FP(LOAD(ldd, %o1 + 0x010, %f4), U3_retl_o2_plus_o3_sll_6_plus_0x80) 282 faligndata %f14, %f0, %f30 283 EX_ST_FP(STORE_BLK(%f16, %o0), U3_retl_o2_plus_o3_sll_6_plus_0x80) 284 EX_LD_FP(LOAD(ldd, %o1 + 0x018, %f6), U3_retl_o2_plus_o3_sll_6_plus_0x40) 285 faligndata %f0, %f2, %f16 286 add %o0, 0x40, %o0 287 288 EX_LD_FP(LOAD(ldd, %o1 + 0x020, %f8), U3_retl_o2_plus_o3_sll_6_plus_0x40) 289 faligndata %f2, %f4, %f18 290 EX_LD_FP(LOAD(ldd, %o1 + 0x028, %f10), U3_retl_o2_plus_o3_sll_6_plus_0x40) 291 faligndata %f4, %f6, %f20 292 EX_LD_FP(LOAD(ldd, %o1 + 0x030, %f12), U3_retl_o2_plus_o3_sll_6_plus_0x40) 293 subcc %o3, 0x01, %o3 294 faligndata %f6, %f8, %f22 295 EX_LD_FP(LOAD(ldd, %o1 + 0x038, %f14), U3_retl_o2_plus_o3_sll_6_plus_0x80) 296 297 faligndata %f8, %f10, %f24 298 EX_LD_FP(LOAD(ldd, %o1 + 0x040, %f0), U3_retl_o2_plus_o3_sll_6_plus_0x80) 299 LOAD(prefetch, %o1 + 0x1c0, #one_read) 300 faligndata %f10, %f12, %f26 301 bg,pt %XCC, 1b 302 add %o1, 0x40, %o1 303 304 /* Finally we copy the last full 64-byte block. */ 3052: 306 EX_LD_FP(LOAD(ldd, %o1 + 0x008, %f2), U3_retl_o2_plus_o3_sll_6_plus_0x80) 307 faligndata %f12, %f14, %f28 308 EX_LD_FP(LOAD(ldd, %o1 + 0x010, %f4), U3_retl_o2_plus_o3_sll_6_plus_0x80) 309 faligndata %f14, %f0, %f30 310 EX_ST_FP(STORE_BLK(%f16, %o0), U3_retl_o2_plus_o3_sll_6_plus_0x80) 311 EX_LD_FP(LOAD(ldd, %o1 + 0x018, %f6), U3_retl_o2_plus_o3_sll_6_plus_0x40) 312 faligndata %f0, %f2, %f16 313 EX_LD_FP(LOAD(ldd, %o1 + 0x020, %f8), U3_retl_o2_plus_o3_sll_6_plus_0x40) 314 faligndata %f2, %f4, %f18 315 EX_LD_FP(LOAD(ldd, %o1 + 0x028, %f10), U3_retl_o2_plus_o3_sll_6_plus_0x40) 316 faligndata %f4, %f6, %f20 317 EX_LD_FP(LOAD(ldd, %o1 + 0x030, %f12), U3_retl_o2_plus_o3_sll_6_plus_0x40) 318 faligndata %f6, %f8, %f22 319 EX_LD_FP(LOAD(ldd, %o1 + 0x038, %f14), U3_retl_o2_plus_o3_sll_6_plus_0x40) 320 faligndata %f8, %f10, %f24 321 cmp %g1, 0 322 be,pt %XCC, 1f 323 add %o0, 0x40, %o0 324 EX_LD_FP(LOAD(ldd, %o1 + 0x040, %f0), U3_retl_o2_plus_o3_sll_6_plus_0x40) 3251: faligndata %f10, %f12, %f26 326 faligndata %f12, %f14, %f28 327 faligndata %f14, %f0, %f30 328 EX_ST_FP(STORE_BLK(%f16, %o0), U3_retl_o2_plus_o3_sll_6_plus_0x40) 329 add %o0, 0x40, %o0 330 add %o1, 0x40, %o1 331 membar #Sync 332 333 /* Now we copy the (len modulo 64) bytes at the end. 334 * Note how we borrow the %f0 loaded above. 335 * 336 * Also notice how this code is careful not to perform a 337 * load past the end of the src buffer. 338 */ 339 and %o2, 0x3f, %o2 340 andcc %o2, 0x38, %g2 341 be,pn %XCC, 2f 342 subcc %g2, 0x8, %g2 343 be,pn %XCC, 2f 344 cmp %g1, 0 345 346 sub %o2, %g2, %o2 347 be,a,pt %XCC, 1f 348 EX_LD_FP(LOAD(ldd, %o1 + 0x00, %f0), U3_retl_o2_plus_g2) 349 3501: EX_LD_FP(LOAD(ldd, %o1 + 0x08, %f2), U3_retl_o2_plus_g2) 351 add %o1, 0x8, %o1 352 subcc %g2, 0x8, %g2 353 faligndata %f0, %f2, %f8 354 EX_ST_FP(STORE(std, %f8, %o0), U3_retl_o2_plus_g2_plus_8) 355 be,pn %XCC, 2f 356 add %o0, 0x8, %o0 357 EX_LD_FP(LOAD(ldd, %o1 + 0x08, %f0), U3_retl_o2_plus_g2) 358 add %o1, 0x8, %o1 359 subcc %g2, 0x8, %g2 360 faligndata %f2, %f0, %f8 361 EX_ST_FP(STORE(std, %f8, %o0), U3_retl_o2_plus_g2_plus_8) 362 bne,pn %XCC, 1b 363 add %o0, 0x8, %o0 364 365 /* If anything is left, we copy it one byte at a time. 366 * Note that %g1 is (src & 0x3) saved above before the 367 * alignaddr was performed. 368 */ 3692: 370 cmp %o2, 0 371 add %o1, %g1, %o1 372 VISExitHalf 373 be,pn %XCC, end_return 374 sub %o0, %o1, %o3 375 376 andcc %g1, 0x7, %g0 377 bne,pn %icc, 90f 378 andcc %o2, 0x8, %g0 379 be,pt %icc, 1f 380 nop 381 EX_LD(LOAD(ldx, %o1, %o5), U3_retl_o2) 382 EX_ST(STORE(stx, %o5, %o1 + %o3), U3_retl_o2) 383 add %o1, 0x8, %o1 384 sub %o2, 8, %o2 385 3861: andcc %o2, 0x4, %g0 387 be,pt %icc, 1f 388 nop 389 EX_LD(LOAD(lduw, %o1, %o5), U3_retl_o2) 390 EX_ST(STORE(stw, %o5, %o1 + %o3), U3_retl_o2) 391 add %o1, 0x4, %o1 392 sub %o2, 4, %o2 393 3941: andcc %o2, 0x2, %g0 395 be,pt %icc, 1f 396 nop 397 EX_LD(LOAD(lduh, %o1, %o5), U3_retl_o2) 398 EX_ST(STORE(sth, %o5, %o1 + %o3), U3_retl_o2) 399 add %o1, 0x2, %o1 400 sub %o2, 2, %o2 401 4021: andcc %o2, 0x1, %g0 403 be,pt %icc, end_return 404 nop 405 EX_LD(LOAD(ldub, %o1, %o5), U3_retl_o2) 406 ba,pt %xcc, end_return 407 EX_ST(STORE(stb, %o5, %o1 + %o3), U3_retl_o2) 408 409 .align 64 410 /* 16 <= len < 192 */ 411less_than_192: 412 bne,pn %XCC, 75f 413 sub %o0, %o1, %o3 414 41572: 416 andn %o2, 0xf, GLOBAL_SPARE 417 and %o2, 0xf, %o2 4181: subcc GLOBAL_SPARE, 0x10, GLOBAL_SPARE 419 EX_LD(LOAD(ldx, %o1 + 0x00, %o5), U3_retl_o2_plus_GS_plus_0x10) 420 EX_LD(LOAD(ldx, %o1 + 0x08, %g1), U3_retl_o2_plus_GS_plus_0x10) 421 EX_ST(STORE(stx, %o5, %o1 + %o3), U3_retl_o2_plus_GS_plus_0x10) 422 add %o1, 0x8, %o1 423 EX_ST(STORE(stx, %g1, %o1 + %o3), U3_retl_o2_plus_GS_plus_0x08) 424 bgu,pt %XCC, 1b 425 add %o1, 0x8, %o1 42673: andcc %o2, 0x8, %g0 427 be,pt %XCC, 1f 428 nop 429 sub %o2, 0x8, %o2 430 EX_LD(LOAD(ldx, %o1, %o5), U3_retl_o2_plus_8) 431 EX_ST(STORE(stx, %o5, %o1 + %o3), U3_retl_o2_plus_8) 432 add %o1, 0x8, %o1 4331: andcc %o2, 0x4, %g0 434 be,pt %XCC, 1f 435 nop 436 sub %o2, 0x4, %o2 437 EX_LD(LOAD(lduw, %o1, %o5), U3_retl_o2_plus_4) 438 EX_ST(STORE(stw, %o5, %o1 + %o3), U3_retl_o2_plus_4) 439 add %o1, 0x4, %o1 4401: cmp %o2, 0 441 be,pt %XCC, end_return 442 nop 443 ba,pt %xcc, 90f 444 nop 445 44675: 447 andcc %o0, 0x7, %g1 448 sub %g1, 0x8, %g1 449 be,pn %icc, 2f 450 sub %g0, %g1, %g1 451 sub %o2, %g1, %o2 452 4531: subcc %g1, 1, %g1 454 EX_LD(LOAD(ldub, %o1, %o5), U3_retl_o2_plus_g1_plus_1) 455 EX_ST(STORE(stb, %o5, %o1 + %o3), U3_retl_o2_plus_g1_plus_1) 456 bgu,pt %icc, 1b 457 add %o1, 1, %o1 458 4592: add %o1, %o3, %o0 460 andcc %o1, 0x7, %g1 461 bne,pt %icc, 8f 462 sll %g1, 3, %g1 463 464 cmp %o2, 16 465 bgeu,pt %icc, 72b 466 nop 467 ba,a,pt %xcc, 73b 468 4698: mov 64, %o3 470 andn %o1, 0x7, %o1 471 EX_LD(LOAD(ldx, %o1, %g2), U3_retl_o2) 472 sub %o3, %g1, %o3 473 andn %o2, 0x7, GLOBAL_SPARE 474 sllx %g2, %g1, %g2 4751: EX_LD(LOAD(ldx, %o1 + 0x8, %g3), U3_retl_o2_and_7_plus_GS) 476 subcc GLOBAL_SPARE, 0x8, GLOBAL_SPARE 477 add %o1, 0x8, %o1 478 srlx %g3, %o3, %o5 479 or %o5, %g2, %o5 480 EX_ST(STORE(stx, %o5, %o0), U3_retl_o2_and_7_plus_GS_plus_8) 481 add %o0, 0x8, %o0 482 bgu,pt %icc, 1b 483 sllx %g3, %g1, %g2 484 485 srl %g1, 3, %g1 486 andcc %o2, 0x7, %o2 487 be,pn %icc, end_return 488 add %o1, %g1, %o1 489 ba,pt %xcc, 90f 490 sub %o0, %o1, %o3 491 492 .align 64 493 /* 0 < len < 16 */ 494less_than_16: 495 andcc %o3, 0x3, %g0 496 bne,pn %XCC, 90f 497 sub %o0, %o1, %o3 498 4991: 500 subcc %o2, 4, %o2 501 EX_LD(LOAD(lduw, %o1, %g1), U3_retl_o2_plus_4) 502 EX_ST(STORE(stw, %g1, %o1 + %o3), U3_retl_o2_plus_4) 503 bgu,pt %XCC, 1b 504 add %o1, 4, %o1 505 506end_return: 507 retl 508 mov EX_RETVAL(%o4), %o0 509 510 .align 32 51190: 512 subcc %o2, 1, %o2 513 EX_LD(LOAD(ldub, %o1, %g1), U3_retl_o2_plus_1) 514 EX_ST(STORE(stb, %g1, %o1 + %o3), U3_retl_o2_plus_1) 515 bgu,pt %XCC, 90b 516 add %o1, 1, %o1 517 retl 518 mov EX_RETVAL(%o4), %o0 519 520 .size FUNC_NAME, .-FUNC_NAME 521