xref: /openbmc/qemu/tcg/tci/tcg-target.c.inc (revision 02e5d7d7) 
1/*
2 * Tiny Code Generator for QEMU
3 *
4 * Copyright (c) 2009, 2011 Stefan Weil
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24
25/* TODO list:
26 * - See TODO comments in code.
27 */
28
29/* Marker for missing code. */
30#define TODO() \
31    do { \
32        fprintf(stderr, "TODO %s:%u: %s()\n", \
33                __FILE__, __LINE__, __func__); \
34        tcg_abort(); \
35    } while (0)
36
37/* Bitfield n...m (in 32 bit value). */
38#define BITS(n, m) (((0xffffffffU << (31 - n)) >> (31 - n + m)) << m)
39
40/* Macros used in tcg_target_op_defs. */
41#define R       "r"
42#define RI      "ri"
43#if TCG_TARGET_REG_BITS == 32
44# define R64    "r", "r"
45#else
46# define R64    "r"
47#endif
48#if TARGET_LONG_BITS > TCG_TARGET_REG_BITS
49# define L      "L", "L"
50# define S      "S", "S"
51#else
52# define L      "L"
53# define S      "S"
54#endif
55
56/* TODO: documentation. */
57static const TCGTargetOpDef tcg_target_op_defs[] = {
58    { INDEX_op_exit_tb, { NULL } },
59    { INDEX_op_goto_tb, { NULL } },
60    { INDEX_op_br, { NULL } },
61
62    { INDEX_op_ld8u_i32, { R, R } },
63    { INDEX_op_ld8s_i32, { R, R } },
64    { INDEX_op_ld16u_i32, { R, R } },
65    { INDEX_op_ld16s_i32, { R, R } },
66    { INDEX_op_ld_i32, { R, R } },
67    { INDEX_op_st8_i32, { R, R } },
68    { INDEX_op_st16_i32, { R, R } },
69    { INDEX_op_st_i32, { R, R } },
70
71    { INDEX_op_add_i32, { R, RI, RI } },
72    { INDEX_op_sub_i32, { R, RI, RI } },
73    { INDEX_op_mul_i32, { R, RI, RI } },
74#if TCG_TARGET_HAS_div_i32
75    { INDEX_op_div_i32, { R, R, R } },
76    { INDEX_op_divu_i32, { R, R, R } },
77    { INDEX_op_rem_i32, { R, R, R } },
78    { INDEX_op_remu_i32, { R, R, R } },
79#elif TCG_TARGET_HAS_div2_i32
80    { INDEX_op_div2_i32, { R, R, "0", "1", R } },
81    { INDEX_op_divu2_i32, { R, R, "0", "1", R } },
82#endif
83    /* TODO: Does R, RI, RI result in faster code than R, R, RI?
84       If both operands are constants, we can optimize. */
85    { INDEX_op_and_i32, { R, RI, RI } },
86#if TCG_TARGET_HAS_andc_i32
87    { INDEX_op_andc_i32, { R, RI, RI } },
88#endif
89#if TCG_TARGET_HAS_eqv_i32
90    { INDEX_op_eqv_i32, { R, RI, RI } },
91#endif
92#if TCG_TARGET_HAS_nand_i32
93    { INDEX_op_nand_i32, { R, RI, RI } },
94#endif
95#if TCG_TARGET_HAS_nor_i32
96    { INDEX_op_nor_i32, { R, RI, RI } },
97#endif
98    { INDEX_op_or_i32, { R, RI, RI } },
99#if TCG_TARGET_HAS_orc_i32
100    { INDEX_op_orc_i32, { R, RI, RI } },
101#endif
102    { INDEX_op_xor_i32, { R, RI, RI } },
103    { INDEX_op_shl_i32, { R, RI, RI } },
104    { INDEX_op_shr_i32, { R, RI, RI } },
105    { INDEX_op_sar_i32, { R, RI, RI } },
106#if TCG_TARGET_HAS_rot_i32
107    { INDEX_op_rotl_i32, { R, RI, RI } },
108    { INDEX_op_rotr_i32, { R, RI, RI } },
109#endif
110#if TCG_TARGET_HAS_deposit_i32
111    { INDEX_op_deposit_i32, { R, "0", R } },
112#endif
113
114    { INDEX_op_brcond_i32, { R, RI } },
115
116    { INDEX_op_setcond_i32, { R, R, RI } },
117#if TCG_TARGET_REG_BITS == 64
118    { INDEX_op_setcond_i64, { R, R, RI } },
119#endif /* TCG_TARGET_REG_BITS == 64 */
120
121#if TCG_TARGET_REG_BITS == 32
122    /* TODO: Support R, R, R, R, RI, RI? Will it be faster? */
123    { INDEX_op_add2_i32, { R, R, R, R, R, R } },
124    { INDEX_op_sub2_i32, { R, R, R, R, R, R } },
125    { INDEX_op_brcond2_i32, { R, R, RI, RI } },
126    { INDEX_op_mulu2_i32, { R, R, R, R } },
127    { INDEX_op_setcond2_i32, { R, R, R, RI, RI } },
128#endif
129
130#if TCG_TARGET_HAS_not_i32
131    { INDEX_op_not_i32, { R, R } },
132#endif
133#if TCG_TARGET_HAS_neg_i32
134    { INDEX_op_neg_i32, { R, R } },
135#endif
136
137#if TCG_TARGET_REG_BITS == 64
138    { INDEX_op_ld8u_i64, { R, R } },
139    { INDEX_op_ld8s_i64, { R, R } },
140    { INDEX_op_ld16u_i64, { R, R } },
141    { INDEX_op_ld16s_i64, { R, R } },
142    { INDEX_op_ld32u_i64, { R, R } },
143    { INDEX_op_ld32s_i64, { R, R } },
144    { INDEX_op_ld_i64, { R, R } },
145
146    { INDEX_op_st8_i64, { R, R } },
147    { INDEX_op_st16_i64, { R, R } },
148    { INDEX_op_st32_i64, { R, R } },
149    { INDEX_op_st_i64, { R, R } },
150
151    { INDEX_op_add_i64, { R, RI, RI } },
152    { INDEX_op_sub_i64, { R, RI, RI } },
153    { INDEX_op_mul_i64, { R, RI, RI } },
154#if TCG_TARGET_HAS_div_i64
155    { INDEX_op_div_i64, { R, R, R } },
156    { INDEX_op_divu_i64, { R, R, R } },
157    { INDEX_op_rem_i64, { R, R, R } },
158    { INDEX_op_remu_i64, { R, R, R } },
159#elif TCG_TARGET_HAS_div2_i64
160    { INDEX_op_div2_i64, { R, R, "0", "1", R } },
161    { INDEX_op_divu2_i64, { R, R, "0", "1", R } },
162#endif
163    { INDEX_op_and_i64, { R, RI, RI } },
164#if TCG_TARGET_HAS_andc_i64
165    { INDEX_op_andc_i64, { R, RI, RI } },
166#endif
167#if TCG_TARGET_HAS_eqv_i64
168    { INDEX_op_eqv_i64, { R, RI, RI } },
169#endif
170#if TCG_TARGET_HAS_nand_i64
171    { INDEX_op_nand_i64, { R, RI, RI } },
172#endif
173#if TCG_TARGET_HAS_nor_i64
174    { INDEX_op_nor_i64, { R, RI, RI } },
175#endif
176    { INDEX_op_or_i64, { R, RI, RI } },
177#if TCG_TARGET_HAS_orc_i64
178    { INDEX_op_orc_i64, { R, RI, RI } },
179#endif
180    { INDEX_op_xor_i64, { R, RI, RI } },
181    { INDEX_op_shl_i64, { R, RI, RI } },
182    { INDEX_op_shr_i64, { R, RI, RI } },
183    { INDEX_op_sar_i64, { R, RI, RI } },
184#if TCG_TARGET_HAS_rot_i64
185    { INDEX_op_rotl_i64, { R, RI, RI } },
186    { INDEX_op_rotr_i64, { R, RI, RI } },
187#endif
188#if TCG_TARGET_HAS_deposit_i64
189    { INDEX_op_deposit_i64, { R, "0", R } },
190#endif
191    { INDEX_op_brcond_i64, { R, RI } },
192
193#if TCG_TARGET_HAS_ext8s_i64
194    { INDEX_op_ext8s_i64, { R, R } },
195#endif
196#if TCG_TARGET_HAS_ext16s_i64
197    { INDEX_op_ext16s_i64, { R, R } },
198#endif
199#if TCG_TARGET_HAS_ext32s_i64
200    { INDEX_op_ext32s_i64, { R, R } },
201#endif
202#if TCG_TARGET_HAS_ext8u_i64
203    { INDEX_op_ext8u_i64, { R, R } },
204#endif
205#if TCG_TARGET_HAS_ext16u_i64
206    { INDEX_op_ext16u_i64, { R, R } },
207#endif
208#if TCG_TARGET_HAS_ext32u_i64
209    { INDEX_op_ext32u_i64, { R, R } },
210#endif
211    { INDEX_op_ext_i32_i64, { R, R } },
212    { INDEX_op_extu_i32_i64, { R, R } },
213#if TCG_TARGET_HAS_bswap16_i64
214    { INDEX_op_bswap16_i64, { R, R } },
215#endif
216#if TCG_TARGET_HAS_bswap32_i64
217    { INDEX_op_bswap32_i64, { R, R } },
218#endif
219#if TCG_TARGET_HAS_bswap64_i64
220    { INDEX_op_bswap64_i64, { R, R } },
221#endif
222#if TCG_TARGET_HAS_not_i64
223    { INDEX_op_not_i64, { R, R } },
224#endif
225#if TCG_TARGET_HAS_neg_i64
226    { INDEX_op_neg_i64, { R, R } },
227#endif
228#endif /* TCG_TARGET_REG_BITS == 64 */
229
230    { INDEX_op_qemu_ld_i32, { R, L } },
231    { INDEX_op_qemu_ld_i64, { R64, L } },
232
233    { INDEX_op_qemu_st_i32, { R, S } },
234    { INDEX_op_qemu_st_i64, { R64, S } },
235
236#if TCG_TARGET_HAS_ext8s_i32
237    { INDEX_op_ext8s_i32, { R, R } },
238#endif
239#if TCG_TARGET_HAS_ext16s_i32
240    { INDEX_op_ext16s_i32, { R, R } },
241#endif
242#if TCG_TARGET_HAS_ext8u_i32
243    { INDEX_op_ext8u_i32, { R, R } },
244#endif
245#if TCG_TARGET_HAS_ext16u_i32
246    { INDEX_op_ext16u_i32, { R, R } },
247#endif
248
249#if TCG_TARGET_HAS_bswap16_i32
250    { INDEX_op_bswap16_i32, { R, R } },
251#endif
252#if TCG_TARGET_HAS_bswap32_i32
253    { INDEX_op_bswap32_i32, { R, R } },
254#endif
255
256    { INDEX_op_mb, { } },
257    { -1 },
258};
259
260static const TCGTargetOpDef *tcg_target_op_def(TCGOpcode op)
261{
262    int i, n = ARRAY_SIZE(tcg_target_op_defs);
263
264    for (i = 0; i < n; ++i) {
265        if (tcg_target_op_defs[i].op == op) {
266            return &tcg_target_op_defs[i];
267        }
268    }
269    return NULL;
270}
271
272static const int tcg_target_reg_alloc_order[] = {
273    TCG_REG_R0,
274    TCG_REG_R1,
275    TCG_REG_R2,
276    TCG_REG_R3,
277#if 0 /* used for TCG_REG_CALL_STACK */
278    TCG_REG_R4,
279#endif
280    TCG_REG_R5,
281    TCG_REG_R6,
282    TCG_REG_R7,
283#if TCG_TARGET_NB_REGS >= 16
284    TCG_REG_R8,
285    TCG_REG_R9,
286    TCG_REG_R10,
287    TCG_REG_R11,
288    TCG_REG_R12,
289    TCG_REG_R13,
290    TCG_REG_R14,
291    TCG_REG_R15,
292#endif
293};
294
295#if MAX_OPC_PARAM_IARGS != 6
296# error Fix needed, number of supported input arguments changed!
297#endif
298
299static const int tcg_target_call_iarg_regs[] = {
300    TCG_REG_R0,
301    TCG_REG_R1,
302    TCG_REG_R2,
303    TCG_REG_R3,
304#if 0 /* used for TCG_REG_CALL_STACK */
305    TCG_REG_R4,
306#endif
307    TCG_REG_R5,
308    TCG_REG_R6,
309#if TCG_TARGET_REG_BITS == 32
310    /* 32 bit hosts need 2 * MAX_OPC_PARAM_IARGS registers. */
311    TCG_REG_R7,
312#if TCG_TARGET_NB_REGS >= 16
313    TCG_REG_R8,
314    TCG_REG_R9,
315    TCG_REG_R10,
316    TCG_REG_R11,
317    TCG_REG_R12,
318#else
319# error Too few input registers available
320#endif
321#endif
322};
323
324static const int tcg_target_call_oarg_regs[] = {
325    TCG_REG_R0,
326#if TCG_TARGET_REG_BITS == 32
327    TCG_REG_R1
328#endif
329};
330
331#ifdef CONFIG_DEBUG_TCG
332static const char *const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
333    "r00",
334    "r01",
335    "r02",
336    "r03",
337    "r04",
338    "r05",
339    "r06",
340    "r07",
341#if TCG_TARGET_NB_REGS >= 16
342    "r08",
343    "r09",
344    "r10",
345    "r11",
346    "r12",
347    "r13",
348    "r14",
349    "r15",
350#if TCG_TARGET_NB_REGS >= 32
351    "r16",
352    "r17",
353    "r18",
354    "r19",
355    "r20",
356    "r21",
357    "r22",
358    "r23",
359    "r24",
360    "r25",
361    "r26",
362    "r27",
363    "r28",
364    "r29",
365    "r30",
366    "r31"
367#endif
368#endif
369};
370#endif
371
372static bool patch_reloc(tcg_insn_unit *code_ptr, int type,
373                        intptr_t value, intptr_t addend)
374{
375    /* tcg_out_reloc always uses the same type, addend. */
376    tcg_debug_assert(type == sizeof(tcg_target_long));
377    tcg_debug_assert(addend == 0);
378    tcg_debug_assert(value != 0);
379    if (TCG_TARGET_REG_BITS == 32) {
380        tcg_patch32(code_ptr, value);
381    } else {
382        tcg_patch64(code_ptr, value);
383    }
384    return true;
385}
386
387/* Parse target specific constraints. */
388static const char *target_parse_constraint(TCGArgConstraint *ct,
389                                           const char *ct_str, TCGType type)
390{
391    switch (*ct_str++) {
392    case 'r':
393    case 'L':                   /* qemu_ld constraint */
394    case 'S':                   /* qemu_st constraint */
395        ct->ct |= TCG_CT_REG;
396        ct->u.regs = BIT(TCG_TARGET_NB_REGS) - 1;
397        break;
398    default:
399        return NULL;
400    }
401    return ct_str;
402}
403
404#if defined(CONFIG_DEBUG_TCG_INTERPRETER)
405/* Show current bytecode. Used by tcg interpreter. */
406void tci_disas(uint8_t opc)
407{
408    const TCGOpDef *def = &tcg_op_defs[opc];
409    fprintf(stderr, "TCG %s %u, %u, %u\n",
410            def->name, def->nb_oargs, def->nb_iargs, def->nb_cargs);
411}
412#endif
413
414/* Write value (native size). */
415static void tcg_out_i(TCGContext *s, tcg_target_ulong v)
416{
417    if (TCG_TARGET_REG_BITS == 32) {
418        tcg_out32(s, v);
419    } else {
420        tcg_out64(s, v);
421    }
422}
423
424/* Write opcode. */
425static void tcg_out_op_t(TCGContext *s, TCGOpcode op)
426{
427    tcg_out8(s, op);
428    tcg_out8(s, 0);
429}
430
431/* Write register. */
432static void tcg_out_r(TCGContext *s, TCGArg t0)
433{
434    tcg_debug_assert(t0 < TCG_TARGET_NB_REGS);
435    tcg_out8(s, t0);
436}
437
438/* Write register or constant (native size). */
439static void tcg_out_ri(TCGContext *s, int const_arg, TCGArg arg)
440{
441    if (const_arg) {
442        tcg_debug_assert(const_arg == 1);
443        tcg_out8(s, TCG_CONST);
444        tcg_out_i(s, arg);
445    } else {
446        tcg_out_r(s, arg);
447    }
448}
449
450/* Write register or constant (32 bit). */
451static void tcg_out_ri32(TCGContext *s, int const_arg, TCGArg arg)
452{
453    if (const_arg) {
454        tcg_debug_assert(const_arg == 1);
455        tcg_out8(s, TCG_CONST);
456        tcg_out32(s, arg);
457    } else {
458        tcg_out_r(s, arg);
459    }
460}
461
462#if TCG_TARGET_REG_BITS == 64
463/* Write register or constant (64 bit). */
464static void tcg_out_ri64(TCGContext *s, int const_arg, TCGArg arg)
465{
466    if (const_arg) {
467        tcg_debug_assert(const_arg == 1);
468        tcg_out8(s, TCG_CONST);
469        tcg_out64(s, arg);
470    } else {
471        tcg_out_r(s, arg);
472    }
473}
474#endif
475
476/* Write label. */
477static void tci_out_label(TCGContext *s, TCGLabel *label)
478{
479    if (label->has_value) {
480        tcg_out_i(s, label->u.value);
481        tcg_debug_assert(label->u.value);
482    } else {
483        tcg_out_reloc(s, s->code_ptr, sizeof(tcg_target_ulong), label, 0);
484        s->code_ptr += sizeof(tcg_target_ulong);
485    }
486}
487
488static void tcg_out_ld(TCGContext *s, TCGType type, TCGReg ret, TCGReg arg1,
489                       intptr_t arg2)
490{
491    uint8_t *old_code_ptr = s->code_ptr;
492    if (type == TCG_TYPE_I32) {
493        tcg_out_op_t(s, INDEX_op_ld_i32);
494        tcg_out_r(s, ret);
495        tcg_out_r(s, arg1);
496        tcg_out32(s, arg2);
497    } else {
498        tcg_debug_assert(type == TCG_TYPE_I64);
499#if TCG_TARGET_REG_BITS == 64
500        tcg_out_op_t(s, INDEX_op_ld_i64);
501        tcg_out_r(s, ret);
502        tcg_out_r(s, arg1);
503        tcg_debug_assert(arg2 == (int32_t)arg2);
504        tcg_out32(s, arg2);
505#else
506        TODO();
507#endif
508    }
509    old_code_ptr[1] = s->code_ptr - old_code_ptr;
510}
511
512static bool tcg_out_mov(TCGContext *s, TCGType type, TCGReg ret, TCGReg arg)
513{
514    uint8_t *old_code_ptr = s->code_ptr;
515    tcg_debug_assert(ret != arg);
516#if TCG_TARGET_REG_BITS == 32
517    tcg_out_op_t(s, INDEX_op_mov_i32);
518#else
519    tcg_out_op_t(s, INDEX_op_mov_i64);
520#endif
521    tcg_out_r(s, ret);
522    tcg_out_r(s, arg);
523    old_code_ptr[1] = s->code_ptr - old_code_ptr;
524    return true;
525}
526
527static void tcg_out_movi(TCGContext *s, TCGType type,
528                         TCGReg t0, tcg_target_long arg)
529{
530    uint8_t *old_code_ptr = s->code_ptr;
531    uint32_t arg32 = arg;
532    if (type == TCG_TYPE_I32 || arg == arg32) {
533        tcg_out_op_t(s, INDEX_op_movi_i32);
534        tcg_out_r(s, t0);
535        tcg_out32(s, arg32);
536    } else {
537        tcg_debug_assert(type == TCG_TYPE_I64);
538#if TCG_TARGET_REG_BITS == 64
539        tcg_out_op_t(s, INDEX_op_movi_i64);
540        tcg_out_r(s, t0);
541        tcg_out64(s, arg);
542#else
543        TODO();
544#endif
545    }
546    old_code_ptr[1] = s->code_ptr - old_code_ptr;
547}
548
549static inline void tcg_out_call(TCGContext *s, tcg_insn_unit *arg)
550{
551    uint8_t *old_code_ptr = s->code_ptr;
552    tcg_out_op_t(s, INDEX_op_call);
553    tcg_out_ri(s, 1, (uintptr_t)arg);
554    old_code_ptr[1] = s->code_ptr - old_code_ptr;
555}
556
557static void tcg_out_op(TCGContext *s, TCGOpcode opc, const TCGArg *args,
558                       const int *const_args)
559{
560    uint8_t *old_code_ptr = s->code_ptr;
561
562    tcg_out_op_t(s, opc);
563
564    switch (opc) {
565    case INDEX_op_exit_tb:
566        tcg_out64(s, args[0]);
567        break;
568    case INDEX_op_goto_tb:
569        if (s->tb_jmp_insn_offset) {
570            /* Direct jump method. */
571            /* Align for atomic patching and thread safety */
572            s->code_ptr = QEMU_ALIGN_PTR_UP(s->code_ptr, 4);
573            s->tb_jmp_insn_offset[args[0]] = tcg_current_code_size(s);
574            tcg_out32(s, 0);
575        } else {
576            /* Indirect jump method. */
577            TODO();
578        }
579        set_jmp_reset_offset(s, args[0]);
580        break;
581    case INDEX_op_br:
582        tci_out_label(s, arg_label(args[0]));
583        break;
584    case INDEX_op_setcond_i32:
585        tcg_out_r(s, args[0]);
586        tcg_out_r(s, args[1]);
587        tcg_out_ri32(s, const_args[2], args[2]);
588        tcg_out8(s, args[3]);   /* condition */
589        break;
590#if TCG_TARGET_REG_BITS == 32
591    case INDEX_op_setcond2_i32:
592        /* setcond2_i32 cond, t0, t1_low, t1_high, t2_low, t2_high */
593        tcg_out_r(s, args[0]);
594        tcg_out_r(s, args[1]);
595        tcg_out_r(s, args[2]);
596        tcg_out_ri32(s, const_args[3], args[3]);
597        tcg_out_ri32(s, const_args[4], args[4]);
598        tcg_out8(s, args[5]);   /* condition */
599        break;
600#elif TCG_TARGET_REG_BITS == 64
601    case INDEX_op_setcond_i64:
602        tcg_out_r(s, args[0]);
603        tcg_out_r(s, args[1]);
604        tcg_out_ri64(s, const_args[2], args[2]);
605        tcg_out8(s, args[3]);   /* condition */
606        break;
607#endif
608    case INDEX_op_ld8u_i32:
609    case INDEX_op_ld8s_i32:
610    case INDEX_op_ld16u_i32:
611    case INDEX_op_ld16s_i32:
612    case INDEX_op_ld_i32:
613    case INDEX_op_st8_i32:
614    case INDEX_op_st16_i32:
615    case INDEX_op_st_i32:
616    case INDEX_op_ld8u_i64:
617    case INDEX_op_ld8s_i64:
618    case INDEX_op_ld16u_i64:
619    case INDEX_op_ld16s_i64:
620    case INDEX_op_ld32u_i64:
621    case INDEX_op_ld32s_i64:
622    case INDEX_op_ld_i64:
623    case INDEX_op_st8_i64:
624    case INDEX_op_st16_i64:
625    case INDEX_op_st32_i64:
626    case INDEX_op_st_i64:
627        tcg_out_r(s, args[0]);
628        tcg_out_r(s, args[1]);
629        tcg_debug_assert(args[2] == (int32_t)args[2]);
630        tcg_out32(s, args[2]);
631        break;
632    case INDEX_op_add_i32:
633    case INDEX_op_sub_i32:
634    case INDEX_op_mul_i32:
635    case INDEX_op_and_i32:
636    case INDEX_op_andc_i32:     /* Optional (TCG_TARGET_HAS_andc_i32). */
637    case INDEX_op_eqv_i32:      /* Optional (TCG_TARGET_HAS_eqv_i32). */
638    case INDEX_op_nand_i32:     /* Optional (TCG_TARGET_HAS_nand_i32). */
639    case INDEX_op_nor_i32:      /* Optional (TCG_TARGET_HAS_nor_i32). */
640    case INDEX_op_or_i32:
641    case INDEX_op_orc_i32:      /* Optional (TCG_TARGET_HAS_orc_i32). */
642    case INDEX_op_xor_i32:
643    case INDEX_op_shl_i32:
644    case INDEX_op_shr_i32:
645    case INDEX_op_sar_i32:
646    case INDEX_op_rotl_i32:     /* Optional (TCG_TARGET_HAS_rot_i32). */
647    case INDEX_op_rotr_i32:     /* Optional (TCG_TARGET_HAS_rot_i32). */
648        tcg_out_r(s, args[0]);
649        tcg_out_ri32(s, const_args[1], args[1]);
650        tcg_out_ri32(s, const_args[2], args[2]);
651        break;
652    case INDEX_op_deposit_i32:  /* Optional (TCG_TARGET_HAS_deposit_i32). */
653        tcg_out_r(s, args[0]);
654        tcg_out_r(s, args[1]);
655        tcg_out_r(s, args[2]);
656        tcg_debug_assert(args[3] <= UINT8_MAX);
657        tcg_out8(s, args[3]);
658        tcg_debug_assert(args[4] <= UINT8_MAX);
659        tcg_out8(s, args[4]);
660        break;
661
662#if TCG_TARGET_REG_BITS == 64
663    case INDEX_op_add_i64:
664    case INDEX_op_sub_i64:
665    case INDEX_op_mul_i64:
666    case INDEX_op_and_i64:
667    case INDEX_op_andc_i64:     /* Optional (TCG_TARGET_HAS_andc_i64). */
668    case INDEX_op_eqv_i64:      /* Optional (TCG_TARGET_HAS_eqv_i64). */
669    case INDEX_op_nand_i64:     /* Optional (TCG_TARGET_HAS_nand_i64). */
670    case INDEX_op_nor_i64:      /* Optional (TCG_TARGET_HAS_nor_i64). */
671    case INDEX_op_or_i64:
672    case INDEX_op_orc_i64:      /* Optional (TCG_TARGET_HAS_orc_i64). */
673    case INDEX_op_xor_i64:
674    case INDEX_op_shl_i64:
675    case INDEX_op_shr_i64:
676    case INDEX_op_sar_i64:
677    case INDEX_op_rotl_i64:     /* Optional (TCG_TARGET_HAS_rot_i64). */
678    case INDEX_op_rotr_i64:     /* Optional (TCG_TARGET_HAS_rot_i64). */
679        tcg_out_r(s, args[0]);
680        tcg_out_ri64(s, const_args[1], args[1]);
681        tcg_out_ri64(s, const_args[2], args[2]);
682        break;
683    case INDEX_op_deposit_i64:  /* Optional (TCG_TARGET_HAS_deposit_i64). */
684        tcg_out_r(s, args[0]);
685        tcg_out_r(s, args[1]);
686        tcg_out_r(s, args[2]);
687        tcg_debug_assert(args[3] <= UINT8_MAX);
688        tcg_out8(s, args[3]);
689        tcg_debug_assert(args[4] <= UINT8_MAX);
690        tcg_out8(s, args[4]);
691        break;
692    case INDEX_op_div_i64:      /* Optional (TCG_TARGET_HAS_div_i64). */
693    case INDEX_op_divu_i64:     /* Optional (TCG_TARGET_HAS_div_i64). */
694    case INDEX_op_rem_i64:      /* Optional (TCG_TARGET_HAS_div_i64). */
695    case INDEX_op_remu_i64:     /* Optional (TCG_TARGET_HAS_div_i64). */
696        TODO();
697        break;
698    case INDEX_op_div2_i64:     /* Optional (TCG_TARGET_HAS_div2_i64). */
699    case INDEX_op_divu2_i64:    /* Optional (TCG_TARGET_HAS_div2_i64). */
700        TODO();
701        break;
702    case INDEX_op_brcond_i64:
703        tcg_out_r(s, args[0]);
704        tcg_out_ri64(s, const_args[1], args[1]);
705        tcg_out8(s, args[2]);           /* condition */
706        tci_out_label(s, arg_label(args[3]));
707        break;
708    case INDEX_op_bswap16_i64:  /* Optional (TCG_TARGET_HAS_bswap16_i64). */
709    case INDEX_op_bswap32_i64:  /* Optional (TCG_TARGET_HAS_bswap32_i64). */
710    case INDEX_op_bswap64_i64:  /* Optional (TCG_TARGET_HAS_bswap64_i64). */
711    case INDEX_op_not_i64:      /* Optional (TCG_TARGET_HAS_not_i64). */
712    case INDEX_op_neg_i64:      /* Optional (TCG_TARGET_HAS_neg_i64). */
713    case INDEX_op_ext8s_i64:    /* Optional (TCG_TARGET_HAS_ext8s_i64). */
714    case INDEX_op_ext8u_i64:    /* Optional (TCG_TARGET_HAS_ext8u_i64). */
715    case INDEX_op_ext16s_i64:   /* Optional (TCG_TARGET_HAS_ext16s_i64). */
716    case INDEX_op_ext16u_i64:   /* Optional (TCG_TARGET_HAS_ext16u_i64). */
717    case INDEX_op_ext32s_i64:   /* Optional (TCG_TARGET_HAS_ext32s_i64). */
718    case INDEX_op_ext32u_i64:   /* Optional (TCG_TARGET_HAS_ext32u_i64). */
719    case INDEX_op_ext_i32_i64:
720    case INDEX_op_extu_i32_i64:
721#endif /* TCG_TARGET_REG_BITS == 64 */
722    case INDEX_op_neg_i32:      /* Optional (TCG_TARGET_HAS_neg_i32). */
723    case INDEX_op_not_i32:      /* Optional (TCG_TARGET_HAS_not_i32). */
724    case INDEX_op_ext8s_i32:    /* Optional (TCG_TARGET_HAS_ext8s_i32). */
725    case INDEX_op_ext16s_i32:   /* Optional (TCG_TARGET_HAS_ext16s_i32). */
726    case INDEX_op_ext8u_i32:    /* Optional (TCG_TARGET_HAS_ext8u_i32). */
727    case INDEX_op_ext16u_i32:   /* Optional (TCG_TARGET_HAS_ext16u_i32). */
728    case INDEX_op_bswap16_i32:  /* Optional (TCG_TARGET_HAS_bswap16_i32). */
729    case INDEX_op_bswap32_i32:  /* Optional (TCG_TARGET_HAS_bswap32_i32). */
730        tcg_out_r(s, args[0]);
731        tcg_out_r(s, args[1]);
732        break;
733    case INDEX_op_div_i32:      /* Optional (TCG_TARGET_HAS_div_i32). */
734    case INDEX_op_divu_i32:     /* Optional (TCG_TARGET_HAS_div_i32). */
735    case INDEX_op_rem_i32:      /* Optional (TCG_TARGET_HAS_div_i32). */
736    case INDEX_op_remu_i32:     /* Optional (TCG_TARGET_HAS_div_i32). */
737        tcg_out_r(s, args[0]);
738        tcg_out_ri32(s, const_args[1], args[1]);
739        tcg_out_ri32(s, const_args[2], args[2]);
740        break;
741    case INDEX_op_div2_i32:     /* Optional (TCG_TARGET_HAS_div2_i32). */
742    case INDEX_op_divu2_i32:    /* Optional (TCG_TARGET_HAS_div2_i32). */
743        TODO();
744        break;
745#if TCG_TARGET_REG_BITS == 32
746    case INDEX_op_add2_i32:
747    case INDEX_op_sub2_i32:
748        tcg_out_r(s, args[0]);
749        tcg_out_r(s, args[1]);
750        tcg_out_r(s, args[2]);
751        tcg_out_r(s, args[3]);
752        tcg_out_r(s, args[4]);
753        tcg_out_r(s, args[5]);
754        break;
755    case INDEX_op_brcond2_i32:
756        tcg_out_r(s, args[0]);
757        tcg_out_r(s, args[1]);
758        tcg_out_ri32(s, const_args[2], args[2]);
759        tcg_out_ri32(s, const_args[3], args[3]);
760        tcg_out8(s, args[4]);           /* condition */
761        tci_out_label(s, arg_label(args[5]));
762        break;
763    case INDEX_op_mulu2_i32:
764        tcg_out_r(s, args[0]);
765        tcg_out_r(s, args[1]);
766        tcg_out_r(s, args[2]);
767        tcg_out_r(s, args[3]);
768        break;
769#endif
770    case INDEX_op_brcond_i32:
771        tcg_out_r(s, args[0]);
772        tcg_out_ri32(s, const_args[1], args[1]);
773        tcg_out8(s, args[2]);           /* condition */
774        tci_out_label(s, arg_label(args[3]));
775        break;
776    case INDEX_op_qemu_ld_i32:
777        tcg_out_r(s, *args++);
778        tcg_out_r(s, *args++);
779        if (TARGET_LONG_BITS > TCG_TARGET_REG_BITS) {
780            tcg_out_r(s, *args++);
781        }
782        tcg_out_i(s, *args++);
783        break;
784    case INDEX_op_qemu_ld_i64:
785        tcg_out_r(s, *args++);
786        if (TCG_TARGET_REG_BITS == 32) {
787            tcg_out_r(s, *args++);
788        }
789        tcg_out_r(s, *args++);
790        if (TARGET_LONG_BITS > TCG_TARGET_REG_BITS) {
791            tcg_out_r(s, *args++);
792        }
793        tcg_out_i(s, *args++);
794        break;
795    case INDEX_op_qemu_st_i32:
796        tcg_out_r(s, *args++);
797        tcg_out_r(s, *args++);
798        if (TARGET_LONG_BITS > TCG_TARGET_REG_BITS) {
799            tcg_out_r(s, *args++);
800        }
801        tcg_out_i(s, *args++);
802        break;
803    case INDEX_op_qemu_st_i64:
804        tcg_out_r(s, *args++);
805        if (TCG_TARGET_REG_BITS == 32) {
806            tcg_out_r(s, *args++);
807        }
808        tcg_out_r(s, *args++);
809        if (TARGET_LONG_BITS > TCG_TARGET_REG_BITS) {
810            tcg_out_r(s, *args++);
811        }
812        tcg_out_i(s, *args++);
813        break;
814    case INDEX_op_mb:
815        break;
816    case INDEX_op_mov_i32:  /* Always emitted via tcg_out_mov.  */
817    case INDEX_op_mov_i64:
818    case INDEX_op_movi_i32: /* Always emitted via tcg_out_movi.  */
819    case INDEX_op_movi_i64:
820    case INDEX_op_call:     /* Always emitted via tcg_out_call.  */
821    default:
822        tcg_abort();
823    }
824    old_code_ptr[1] = s->code_ptr - old_code_ptr;
825}
826
827static void tcg_out_st(TCGContext *s, TCGType type, TCGReg arg, TCGReg arg1,
828                       intptr_t arg2)
829{
830    uint8_t *old_code_ptr = s->code_ptr;
831    if (type == TCG_TYPE_I32) {
832        tcg_out_op_t(s, INDEX_op_st_i32);
833        tcg_out_r(s, arg);
834        tcg_out_r(s, arg1);
835        tcg_out32(s, arg2);
836    } else {
837        tcg_debug_assert(type == TCG_TYPE_I64);
838#if TCG_TARGET_REG_BITS == 64
839        tcg_out_op_t(s, INDEX_op_st_i64);
840        tcg_out_r(s, arg);
841        tcg_out_r(s, arg1);
842        tcg_out32(s, arg2);
843#else
844        TODO();
845#endif
846    }
847    old_code_ptr[1] = s->code_ptr - old_code_ptr;
848}
849
850static inline bool tcg_out_sti(TCGContext *s, TCGType type, TCGArg val,
851                               TCGReg base, intptr_t ofs)
852{
853    return false;
854}
855
856/* Test if a constant matches the constraint. */
857static int tcg_target_const_match(tcg_target_long val, TCGType type,
858                                  const TCGArgConstraint *arg_ct)
859{
860    /* No need to return 0 or 1, 0 or != 0 is good enough. */
861    return arg_ct->ct & TCG_CT_CONST;
862}
863
864static void tcg_target_init(TCGContext *s)
865{
866#if defined(CONFIG_DEBUG_TCG_INTERPRETER)
867    const char *envval = getenv("DEBUG_TCG");
868    if (envval) {
869        qemu_set_log(strtol(envval, NULL, 0));
870    }
871#endif
872
873    /* The current code uses uint8_t for tcg operations. */
874    tcg_debug_assert(tcg_op_defs_max <= UINT8_MAX);
875
876    /* Registers available for 32 bit operations. */
877    tcg_target_available_regs[TCG_TYPE_I32] = BIT(TCG_TARGET_NB_REGS) - 1;
878    /* Registers available for 64 bit operations. */
879    tcg_target_available_regs[TCG_TYPE_I64] = BIT(TCG_TARGET_NB_REGS) - 1;
880    /* TODO: Which registers should be set here? */
881    tcg_target_call_clobber_regs = BIT(TCG_TARGET_NB_REGS) - 1;
882
883    s->reserved_regs = 0;
884    tcg_regset_set_reg(s->reserved_regs, TCG_REG_CALL_STACK);
885
886    /* We use negative offsets from "sp" so that we can distinguish
887       stores that might pretend to be call arguments.  */
888    tcg_set_frame(s, TCG_REG_CALL_STACK,
889                  -CPU_TEMP_BUF_NLONGS * sizeof(long),
890                  CPU_TEMP_BUF_NLONGS * sizeof(long));
891}
892
893/* Generate global QEMU prologue and epilogue code. */
894static inline void tcg_target_qemu_prologue(TCGContext *s)
895{
896}
897