2 * Stack-less Just-In-Time compiler
4 * Copyright 2009-2012 Zoltan Herczeg (hzmester@freemail.hu). All rights reserved.
6 * Redistribution and use in source and binary forms, with or without modification, are
7 * permitted provided that the following conditions are met:
9 * 1. Redistributions of source code must retain the above copyright notice, this list of
10 * conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
13 * of conditions and the following disclaimer in the documentation and/or other materials
14 * provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND CONTRIBUTORS ``AS IS'' AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
19 * SHALL THE COPYRIGHT HOLDER(S) OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
21 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
22 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
24 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 /* x86 64-bit arch dependent functions. */
29 static sljit_si emit_load_imm64(struct sljit_compiler *compiler, sljit_si reg, sljit_sw imm)
33 inst = (sljit_ub*)ensure_buf(compiler, 1 + 2 + sizeof(sljit_sw));
35 INC_SIZE(2 + sizeof(sljit_sw));
36 *inst++ = REX_W | ((reg_map[reg] <= 7) ? 0 : REX_B);
37 *inst++ = MOV_r_i32 + (reg_map[reg] & 0x7);
38 *(sljit_sw*)inst = imm;
42 static sljit_ub* generate_far_jump_code(struct sljit_jump *jump, sljit_ub *code_ptr, sljit_si type)
44 if (type < SLJIT_JUMP) {
46 *code_ptr++ = get_jump_code(type ^ 0x1) - 0x10;
50 SLJIT_COMPILE_ASSERT(reg_map[TMP_REG3] == 9, tmp3_is_9_first);
51 *code_ptr++ = REX_W | REX_B;
52 *code_ptr++ = MOV_r_i32 + 1;
53 jump->addr = (sljit_uw)code_ptr;
55 if (jump->flags & JUMP_LABEL)
56 jump->flags |= PATCH_MD;
58 *(sljit_sw*)code_ptr = jump->u.target;
60 code_ptr += sizeof(sljit_sw);
62 *code_ptr++ = GROUP_FF;
63 *code_ptr++ = (type >= SLJIT_FAST_CALL) ? (MOD_REG | CALL_rm | 1) : (MOD_REG | JMP_rm | 1);
68 static sljit_ub* generate_fixed_jump(sljit_ub *code_ptr, sljit_sw addr, sljit_si type)
70 sljit_sw delta = addr - ((sljit_sw)code_ptr + 1 + sizeof(sljit_si));
72 if (delta <= HALFWORD_MAX && delta >= HALFWORD_MIN) {
73 *code_ptr++ = (type == 2) ? CALL_i32 : JMP_i32;
74 *(sljit_sw*)code_ptr = delta;
77 SLJIT_COMPILE_ASSERT(reg_map[TMP_REG3] == 9, tmp3_is_9_second);
78 *code_ptr++ = REX_W | REX_B;
79 *code_ptr++ = MOV_r_i32 + 1;
80 *(sljit_sw*)code_ptr = addr;
81 code_ptr += sizeof(sljit_sw);
83 *code_ptr++ = GROUP_FF;
84 *code_ptr++ = (type == 2) ? (MOD_REG | CALL_rm | 1) : (MOD_REG | JMP_rm | 1);
90 SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_enter(struct sljit_compiler *compiler,
91 sljit_si options, sljit_si args, sljit_si scratches, sljit_si saveds,
92 sljit_si fscratches, sljit_si fsaveds, sljit_si local_size)
94 sljit_si i, tmp, size, saved_register_size;
98 CHECK(check_sljit_emit_enter(compiler, options, args, scratches, saveds, fscratches, fsaveds, local_size));
99 set_emit_enter(compiler, options, args, scratches, saveds, fscratches, fsaveds, local_size);
101 compiler->flags_saved = 0;
103 /* Including the return address saved by the call instruction. */
104 saved_register_size = GET_SAVED_REGISTERS_SIZE(scratches, saveds, 1);
106 tmp = saveds < SLJIT_NUMBER_OF_SAVED_REGISTERS ? (SLJIT_S0 + 1 - saveds) : SLJIT_FIRST_SAVED_REG;
107 for (i = SLJIT_S0; i >= tmp; i--) {
108 size = reg_map[i] >= 8 ? 2 : 1;
109 inst = (sljit_ub*)ensure_buf(compiler, 1 + size);
114 PUSH_REG(reg_lmap[i]);
117 for (i = scratches; i >= SLJIT_FIRST_SAVED_REG; i--) {
118 size = reg_map[i] >= 8 ? 2 : 1;
119 inst = (sljit_ub*)ensure_buf(compiler, 1 + size);
124 PUSH_REG(reg_lmap[i]);
129 inst = (sljit_ub*)ensure_buf(compiler, 1 + size);
138 *inst++ = MOD_REG | (reg_map[SLJIT_S0] << 3) | 0x7 /* rdi */;
141 *inst++ = REX_W | REX_R;
143 *inst++ = MOD_REG | (reg_lmap[SLJIT_S1] << 3) | 0x6 /* rsi */;
146 *inst++ = REX_W | REX_R;
148 *inst++ = MOD_REG | (reg_lmap[SLJIT_S2] << 3) | 0x2 /* rdx */;
154 *inst++ = MOD_REG | (reg_map[SLJIT_S0] << 3) | 0x1 /* rcx */;
159 *inst++ = MOD_REG | (reg_map[SLJIT_S1] << 3) | 0x2 /* rdx */;
162 *inst++ = REX_W | REX_B;
164 *inst++ = MOD_REG | (reg_map[SLJIT_S2] << 3) | 0x0 /* r8 */;
169 local_size = ((local_size + SLJIT_LOCALS_OFFSET + saved_register_size + 15) & ~15) - saved_register_size;
170 compiler->local_size = local_size;
173 if (local_size > 1024) {
174 /* Allocate stack for the callback, which grows the stack. */
175 inst = (sljit_ub*)ensure_buf(compiler, 1 + 4 + (3 + sizeof(sljit_si)));
177 INC_SIZE(4 + (3 + sizeof(sljit_si)));
179 *inst++ = GROUP_BINARY_83;
180 *inst++ = MOD_REG | SUB | 4;
181 /* Allocated size for registers must be divisible by 8. */
182 SLJIT_ASSERT(!(saved_register_size & 0x7));
183 /* Aligned to 16 byte. */
184 if (saved_register_size & 0x8) {
185 *inst++ = 5 * sizeof(sljit_sw);
186 local_size -= 5 * sizeof(sljit_sw);
188 *inst++ = 4 * sizeof(sljit_sw);
189 local_size -= 4 * sizeof(sljit_sw);
191 /* Second instruction */
192 SLJIT_COMPILE_ASSERT(reg_map[SLJIT_R0] < 8, temporary_reg1_is_loreg);
194 *inst++ = MOV_rm_i32;
195 *inst++ = MOD_REG | reg_lmap[SLJIT_R0];
196 *(sljit_si*)inst = local_size;
197 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
198 || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
199 compiler->skip_checks = 1;
201 FAIL_IF(sljit_emit_ijump(compiler, SLJIT_CALL1, SLJIT_IMM, SLJIT_FUNC_OFFSET(sljit_grow_stack)));
205 SLJIT_ASSERT(local_size > 0);
206 if (local_size <= 127) {
207 inst = (sljit_ub*)ensure_buf(compiler, 1 + 4);
211 *inst++ = GROUP_BINARY_83;
212 *inst++ = MOD_REG | SUB | 4;
213 *inst++ = local_size;
216 inst = (sljit_ub*)ensure_buf(compiler, 1 + 7);
220 *inst++ = GROUP_BINARY_81;
221 *inst++ = MOD_REG | SUB | 4;
222 *(sljit_si*)inst = local_size;
223 inst += sizeof(sljit_si);
227 /* Save xmm6 register: movaps [rsp + 0x20], xmm6 */
228 if (fscratches >= 6 || fsaveds >= 1) {
229 inst = (sljit_ub*)ensure_buf(compiler, 1 + 5);
233 *(sljit_si*)inst = 0x20247429;
237 return SLJIT_SUCCESS;
240 SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_set_context(struct sljit_compiler *compiler,
241 sljit_si options, sljit_si args, sljit_si scratches, sljit_si saveds,
242 sljit_si fscratches, sljit_si fsaveds, sljit_si local_size)
244 sljit_si saved_register_size;
247 CHECK(check_sljit_set_context(compiler, options, args, scratches, saveds, fscratches, fsaveds, local_size));
248 set_set_context(compiler, options, args, scratches, saveds, fscratches, fsaveds, local_size);
250 /* Including the return address saved by the call instruction. */
251 saved_register_size = GET_SAVED_REGISTERS_SIZE(scratches, saveds, 1);
252 compiler->local_size = ((local_size + SLJIT_LOCALS_OFFSET + saved_register_size + 15) & ~15) - saved_register_size;
253 return SLJIT_SUCCESS;
256 SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_return(struct sljit_compiler *compiler, sljit_si op, sljit_si src, sljit_sw srcw)
258 sljit_si i, tmp, size;
262 CHECK(check_sljit_emit_return(compiler, op, src, srcw));
264 compiler->flags_saved = 0;
265 FAIL_IF(emit_mov_before_return(compiler, op, src, srcw));
268 /* Restore xmm6 register: movaps xmm6, [rsp + 0x20] */
269 if (compiler->fscratches >= 6 || compiler->fsaveds >= 1) {
270 inst = (sljit_ub*)ensure_buf(compiler, 1 + 5);
274 *(sljit_si*)inst = 0x20247428;
278 SLJIT_ASSERT(compiler->local_size > 0);
279 if (compiler->local_size <= 127) {
280 inst = (sljit_ub*)ensure_buf(compiler, 1 + 4);
284 *inst++ = GROUP_BINARY_83;
285 *inst++ = MOD_REG | ADD | 4;
286 *inst = compiler->local_size;
289 inst = (sljit_ub*)ensure_buf(compiler, 1 + 7);
293 *inst++ = GROUP_BINARY_81;
294 *inst++ = MOD_REG | ADD | 4;
295 *(sljit_si*)inst = compiler->local_size;
298 tmp = compiler->scratches;
299 for (i = SLJIT_FIRST_SAVED_REG; i <= tmp; i++) {
300 size = reg_map[i] >= 8 ? 2 : 1;
301 inst = (sljit_ub*)ensure_buf(compiler, 1 + size);
306 POP_REG(reg_lmap[i]);
309 tmp = compiler->saveds < SLJIT_NUMBER_OF_SAVED_REGISTERS ? (SLJIT_S0 + 1 - compiler->saveds) : SLJIT_FIRST_SAVED_REG;
310 for (i = tmp; i <= SLJIT_S0; i++) {
311 size = reg_map[i] >= 8 ? 2 : 1;
312 inst = (sljit_ub*)ensure_buf(compiler, 1 + size);
317 POP_REG(reg_lmap[i]);
320 inst = (sljit_ub*)ensure_buf(compiler, 1 + 1);
324 return SLJIT_SUCCESS;
327 /* --------------------------------------------------------------------- */
329 /* --------------------------------------------------------------------- */
331 static sljit_si emit_do_imm32(struct sljit_compiler *compiler, sljit_ub rex, sljit_ub opcode, sljit_sw imm)
334 sljit_si length = 1 + (rex ? 1 : 0) + sizeof(sljit_si);
336 inst = (sljit_ub*)ensure_buf(compiler, 1 + length);
342 *(sljit_si*)inst = imm;
343 return SLJIT_SUCCESS;
346 static sljit_ub* emit_x86_instruction(struct sljit_compiler *compiler, sljit_si size,
347 /* The register or immediate operand. */
348 sljit_si a, sljit_sw imma,
349 /* The general operand (not immediate). */
350 sljit_si b, sljit_sw immb)
355 sljit_si flags = size & ~0xf;
358 /* The immediate operand must be 32 bit. */
359 SLJIT_ASSERT(!(a & SLJIT_IMM) || compiler->mode32 || IS_HALFWORD(imma));
360 /* Both cannot be switched on. */
361 SLJIT_ASSERT((flags & (EX86_BIN_INS | EX86_SHIFT_INS)) != (EX86_BIN_INS | EX86_SHIFT_INS));
362 /* Size flags not allowed for typed instructions. */
363 SLJIT_ASSERT(!(flags & (EX86_BIN_INS | EX86_SHIFT_INS)) || (flags & (EX86_BYTE_ARG | EX86_HALF_ARG)) == 0);
364 /* Both size flags cannot be switched on. */
365 SLJIT_ASSERT((flags & (EX86_BYTE_ARG | EX86_HALF_ARG)) != (EX86_BYTE_ARG | EX86_HALF_ARG));
366 /* SSE2 and immediate is not possible. */
367 SLJIT_ASSERT(!(a & SLJIT_IMM) || !(flags & EX86_SSE2));
368 SLJIT_ASSERT((flags & (EX86_PREF_F2 | EX86_PREF_F3)) != (EX86_PREF_F2 | EX86_PREF_F3)
369 && (flags & (EX86_PREF_F2 | EX86_PREF_66)) != (EX86_PREF_F2 | EX86_PREF_66)
370 && (flags & (EX86_PREF_F3 | EX86_PREF_66)) != (EX86_PREF_F3 | EX86_PREF_66));
375 if (!compiler->mode32 && !(flags & EX86_NO_REXW))
377 else if (flags & EX86_REX)
380 if (flags & (EX86_PREF_F2 | EX86_PREF_F3))
382 if (flags & EX86_PREF_66)
385 /* Calculate size of b. */
386 inst_size += 1; /* mod r/m byte. */
388 if (!(b & OFFS_REG_MASK)) {
389 if (NOT_HALFWORD(immb)) {
390 if (emit_load_imm64(compiler, TMP_REG3, immb))
394 b |= TO_OFFS_REG(TMP_REG3);
398 else if (reg_lmap[b & REG_MASK] == 4)
399 b |= TO_OFFS_REG(SLJIT_SP);
402 if ((b & REG_MASK) == SLJIT_UNUSED)
403 inst_size += 1 + sizeof(sljit_si); /* SIB byte required to avoid RIP based addressing. */
405 if (reg_map[b & REG_MASK] >= 8)
408 if (immb != 0 && (!(b & OFFS_REG_MASK) || (b & OFFS_REG_MASK) == TO_OFFS_REG(SLJIT_SP))) {
409 /* Immediate operand. */
410 if (immb <= 127 && immb >= -128)
411 inst_size += sizeof(sljit_sb);
413 inst_size += sizeof(sljit_si);
415 else if (reg_lmap[b & REG_MASK] == 5)
416 inst_size += sizeof(sljit_sb);
418 if ((b & OFFS_REG_MASK) != SLJIT_UNUSED) {
419 inst_size += 1; /* SIB byte. */
420 if (reg_map[OFFS_REG(b)] >= 8)
425 else if (!(flags & EX86_SSE2_OP2) && reg_map[b] >= 8)
429 if (flags & EX86_BIN_INS) {
430 if (imma <= 127 && imma >= -128) {
432 flags |= EX86_BYTE_ARG;
436 else if (flags & EX86_SHIFT_INS) {
437 imma &= compiler->mode32 ? 0x1f : 0x3f;
440 flags |= EX86_BYTE_ARG;
442 } else if (flags & EX86_BYTE_ARG)
444 else if (flags & EX86_HALF_ARG)
445 inst_size += sizeof(short);
447 inst_size += sizeof(sljit_si);
450 SLJIT_ASSERT(!(flags & EX86_SHIFT_INS) || a == SLJIT_PREF_SHIFT_REG);
451 /* reg_map[SLJIT_PREF_SHIFT_REG] is less than 8. */
452 if (!(flags & EX86_SSE2_OP1) && reg_map[a] >= 8)
459 inst = (sljit_ub*)ensure_buf(compiler, 1 + inst_size);
462 /* Encoding the byte. */
464 if (flags & EX86_PREF_F2)
466 if (flags & EX86_PREF_F3)
468 if (flags & EX86_PREF_66)
472 buf_ptr = inst + size;
474 /* Encode mod/rm byte. */
475 if (!(flags & EX86_SHIFT_INS)) {
476 if ((flags & EX86_BIN_INS) && (a & SLJIT_IMM))
477 *inst = (flags & EX86_BYTE_ARG) ? GROUP_BINARY_83 : GROUP_BINARY_81;
479 if ((a & SLJIT_IMM) || (a == 0))
481 else if (!(flags & EX86_SSE2_OP1))
482 *buf_ptr = reg_lmap[a] << 3;
489 *inst = GROUP_SHIFT_1;
491 *inst = GROUP_SHIFT_N;
493 *inst = GROUP_SHIFT_CL;
497 if (!(b & SLJIT_MEM))
498 *buf_ptr++ |= MOD_REG + ((!(flags & EX86_SSE2_OP2)) ? reg_lmap[b] : b);
499 else if ((b & REG_MASK) != SLJIT_UNUSED) {
500 if ((b & OFFS_REG_MASK) == SLJIT_UNUSED || (b & OFFS_REG_MASK) == TO_OFFS_REG(SLJIT_SP)) {
501 if (immb != 0 || reg_lmap[b & REG_MASK] == 5) {
502 if (immb <= 127 && immb >= -128)
508 if ((b & OFFS_REG_MASK) == SLJIT_UNUSED)
509 *buf_ptr++ |= reg_lmap[b & REG_MASK];
512 *buf_ptr++ = reg_lmap[b & REG_MASK] | (reg_lmap[OFFS_REG(b)] << 3);
515 if (immb != 0 || reg_lmap[b & REG_MASK] == 5) {
516 if (immb <= 127 && immb >= -128)
517 *buf_ptr++ = immb; /* 8 bit displacement. */
519 *(sljit_si*)buf_ptr = immb; /* 32 bit displacement. */
520 buf_ptr += sizeof(sljit_si);
525 if (reg_lmap[b & REG_MASK] == 5)
528 *buf_ptr++ = reg_lmap[b & REG_MASK] | (reg_lmap[OFFS_REG(b)] << 3) | (immb << 6);
529 if (reg_lmap[b & REG_MASK] == 5)
536 *(sljit_si*)buf_ptr = immb; /* 32 bit displacement. */
537 buf_ptr += sizeof(sljit_si);
541 if (flags & EX86_BYTE_ARG)
543 else if (flags & EX86_HALF_ARG)
544 *(short*)buf_ptr = imma;
545 else if (!(flags & EX86_SHIFT_INS))
546 *(sljit_si*)buf_ptr = imma;
549 return !(flags & EX86_SHIFT_INS) ? inst : (inst + 1);
552 /* --------------------------------------------------------------------- */
553 /* Call / return instructions */
554 /* --------------------------------------------------------------------- */
556 static SLJIT_INLINE sljit_si call_with_args(struct sljit_compiler *compiler, sljit_si type)
561 SLJIT_COMPILE_ASSERT(reg_map[SLJIT_R1] == 6 && reg_map[SLJIT_R0] < 8 && reg_map[SLJIT_R2] < 8, args_registers);
563 inst = (sljit_ub*)ensure_buf(compiler, 1 + ((type < SLJIT_CALL3) ? 3 : 6));
565 INC_SIZE((type < SLJIT_CALL3) ? 3 : 6);
566 if (type >= SLJIT_CALL3) {
569 *inst++ = MOD_REG | (0x2 /* rdx */ << 3) | reg_lmap[SLJIT_R2];
573 *inst++ = MOD_REG | (0x7 /* rdi */ << 3) | reg_lmap[SLJIT_R0];
575 SLJIT_COMPILE_ASSERT(reg_map[SLJIT_R1] == 2 && reg_map[SLJIT_R0] < 8 && reg_map[SLJIT_R2] < 8, args_registers);
577 inst = (sljit_ub*)ensure_buf(compiler, 1 + ((type < SLJIT_CALL3) ? 3 : 6));
579 INC_SIZE((type < SLJIT_CALL3) ? 3 : 6);
580 if (type >= SLJIT_CALL3) {
581 *inst++ = REX_W | REX_R;
583 *inst++ = MOD_REG | (0x0 /* r8 */ << 3) | reg_lmap[SLJIT_R2];
587 *inst++ = MOD_REG | (0x1 /* rcx */ << 3) | reg_lmap[SLJIT_R0];
589 return SLJIT_SUCCESS;
592 SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_fast_enter(struct sljit_compiler *compiler, sljit_si dst, sljit_sw dstw)
597 CHECK(check_sljit_emit_fast_enter(compiler, dst, dstw));
598 ADJUST_LOCAL_OFFSET(dst, dstw);
600 /* For UNUSED dst. Uncommon, but possible. */
601 if (dst == SLJIT_UNUSED)
604 if (FAST_IS_REG(dst)) {
605 if (reg_map[dst] < 8) {
606 inst = (sljit_ub*)ensure_buf(compiler, 1 + 1);
609 POP_REG(reg_lmap[dst]);
610 return SLJIT_SUCCESS;
613 inst = (sljit_ub*)ensure_buf(compiler, 1 + 2);
617 POP_REG(reg_lmap[dst]);
618 return SLJIT_SUCCESS;
621 /* REX_W is not necessary (src is not immediate). */
622 compiler->mode32 = 1;
623 inst = emit_x86_instruction(compiler, 1, 0, 0, dst, dstw);
626 return SLJIT_SUCCESS;
629 SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_fast_return(struct sljit_compiler *compiler, sljit_si src, sljit_sw srcw)
634 CHECK(check_sljit_emit_fast_return(compiler, src, srcw));
635 ADJUST_LOCAL_OFFSET(src, srcw);
637 if ((src & SLJIT_IMM) && NOT_HALFWORD(srcw)) {
638 FAIL_IF(emit_load_imm64(compiler, TMP_REG1, srcw));
642 if (FAST_IS_REG(src)) {
643 if (reg_map[src] < 8) {
644 inst = (sljit_ub*)ensure_buf(compiler, 1 + 1 + 1);
648 PUSH_REG(reg_lmap[src]);
651 inst = (sljit_ub*)ensure_buf(compiler, 1 + 2 + 1);
656 PUSH_REG(reg_lmap[src]);
659 else if (src & SLJIT_MEM) {
660 /* REX_W is not necessary (src is not immediate). */
661 compiler->mode32 = 1;
662 inst = emit_x86_instruction(compiler, 1, 0, 0, src, srcw);
667 inst = (sljit_ub*)ensure_buf(compiler, 1 + 1);
672 SLJIT_ASSERT(IS_HALFWORD(srcw));
674 inst = (sljit_ub*)ensure_buf(compiler, 1 + 5 + 1);
679 *(sljit_si*)inst = srcw;
680 inst += sizeof(sljit_si);
684 return SLJIT_SUCCESS;
688 /* --------------------------------------------------------------------- */
690 /* --------------------------------------------------------------------- */
692 static sljit_si emit_mov_int(struct sljit_compiler *compiler, sljit_si sign,
693 sljit_si dst, sljit_sw dstw,
694 sljit_si src, sljit_sw srcw)
699 compiler->mode32 = 0;
701 if (dst == SLJIT_UNUSED && !(src & SLJIT_MEM))
702 return SLJIT_SUCCESS; /* Empty instruction. */
704 if (src & SLJIT_IMM) {
705 if (FAST_IS_REG(dst)) {
706 if (sign || ((sljit_uw)srcw <= 0x7fffffff)) {
707 inst = emit_x86_instruction(compiler, 1, SLJIT_IMM, (sljit_sw)(sljit_si)srcw, dst, dstw);
710 return SLJIT_SUCCESS;
712 return emit_load_imm64(compiler, dst, srcw);
714 compiler->mode32 = 1;
715 inst = emit_x86_instruction(compiler, 1, SLJIT_IMM, (sljit_sw)(sljit_si)srcw, dst, dstw);
718 compiler->mode32 = 0;
719 return SLJIT_SUCCESS;
722 dst_r = FAST_IS_REG(dst) ? dst : TMP_REG1;
724 if ((dst & SLJIT_MEM) && FAST_IS_REG(src))
728 inst = emit_x86_instruction(compiler, 1, dst_r, 0, src, srcw);
730 *inst++ = MOVSXD_r_rm;
732 compiler->mode32 = 1;
733 FAIL_IF(emit_mov(compiler, dst_r, 0, src, srcw));
734 compiler->mode32 = 0;
738 if (dst & SLJIT_MEM) {
739 compiler->mode32 = 1;
740 inst = emit_x86_instruction(compiler, 1, dst_r, 0, dst, dstw);
743 compiler->mode32 = 0;
746 return SLJIT_SUCCESS;