diff options
Diffstat (limited to 'sljit/sljitNativeX86_64.c')
| -rw-r--r-- | sljit/sljitNativeX86_64.c | 810 |
1 files changed, 810 insertions, 0 deletions
diff --git a/sljit/sljitNativeX86_64.c b/sljit/sljitNativeX86_64.c new file mode 100644 index 0000000..967f3c3 --- /dev/null +++ b/sljit/sljitNativeX86_64.c @@ -0,0 +1,810 @@ +/* + * Stack-less Just-In-Time compiler + * + * Copyright 2009-2012 Zoltan Herczeg (hzmester@freemail.hu). All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, are + * permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this list of + * conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, this list + * of conditions and the following disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND CONTRIBUTORS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE COPYRIGHT HOLDER(S) OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED + * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/* x86 64-bit arch dependent functions. */ + +static sljit_si emit_load_imm64(struct sljit_compiler *compiler, sljit_si reg, sljit_sw imm) +{ + sljit_ub *inst; + + inst = (sljit_ub*)ensure_buf(compiler, 1 + 2 + sizeof(sljit_sw)); + FAIL_IF(!inst); + INC_SIZE(2 + sizeof(sljit_sw)); + *inst++ = REX_W | ((reg_map[reg] <= 7) ? 0 : REX_B); + *inst++ = MOV_r_i32 + (reg_map[reg] & 0x7); + *(sljit_sw*)inst = imm; + return SLJIT_SUCCESS; +} + +static sljit_ub* generate_far_jump_code(struct sljit_jump *jump, sljit_ub *code_ptr, sljit_si type) +{ + if (type < SLJIT_JUMP) { + /* Invert type. */ + *code_ptr++ = get_jump_code(type ^ 0x1) - 0x10; + *code_ptr++ = 10 + 3; + } + + SLJIT_COMPILE_ASSERT(reg_map[TMP_REG3] == 9, tmp3_is_9_first); + *code_ptr++ = REX_W | REX_B; + *code_ptr++ = MOV_r_i32 + 1; + jump->addr = (sljit_uw)code_ptr; + + if (jump->flags & JUMP_LABEL) + jump->flags |= PATCH_MD; + else + *(sljit_sw*)code_ptr = jump->u.target; + + code_ptr += sizeof(sljit_sw); + *code_ptr++ = REX_B; + *code_ptr++ = GROUP_FF; + *code_ptr++ = (type >= SLJIT_FAST_CALL) ? (MOD_REG | CALL_rm | 1) : (MOD_REG | JMP_rm | 1); + + return code_ptr; +} + +static sljit_ub* generate_fixed_jump(sljit_ub *code_ptr, sljit_sw addr, sljit_si type) +{ + sljit_sw delta = addr - ((sljit_sw)code_ptr + 1 + sizeof(sljit_si)); + + if (delta <= HALFWORD_MAX && delta >= HALFWORD_MIN) { + *code_ptr++ = (type == 2) ? CALL_i32 : JMP_i32; + *(sljit_sw*)code_ptr = delta; + } + else { + SLJIT_COMPILE_ASSERT(reg_map[TMP_REG3] == 9, tmp3_is_9_second); + *code_ptr++ = REX_W | REX_B; + *code_ptr++ = MOV_r_i32 + 1; + *(sljit_sw*)code_ptr = addr; + code_ptr += sizeof(sljit_sw); + *code_ptr++ = REX_B; + *code_ptr++ = GROUP_FF; + *code_ptr++ = (type == 2) ? (MOD_REG | CALL_rm | 1) : (MOD_REG | JMP_rm | 1); + } + + return code_ptr; +} + +SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_enter(struct sljit_compiler *compiler, sljit_si args, sljit_si scratches, sljit_si saveds, sljit_si local_size) +{ + sljit_si size, pushed_size; + sljit_ub *inst; + + CHECK_ERROR(); + check_sljit_emit_enter(compiler, args, scratches, saveds, local_size); + + compiler->scratches = scratches; + compiler->saveds = saveds; + compiler->flags_saved = 0; +#if (defined SLJIT_DEBUG && SLJIT_DEBUG) + compiler->logical_local_size = local_size; +#endif + + size = saveds; + /* Including the return address saved by the call instruction. */ + pushed_size = (saveds + 1) * sizeof(sljit_sw); +#ifndef _WIN64 + if (saveds >= 2) + size += saveds - 1; +#else + if (saveds >= 4) + size += saveds - 3; + if (scratches >= 5) { + size += (5 - 4) * 2; + pushed_size += sizeof(sljit_sw); + } +#endif + size += args * 3; + if (size > 0) { + inst = (sljit_ub*)ensure_buf(compiler, 1 + size); + FAIL_IF(!inst); + + INC_SIZE(size); + if (saveds >= 5) { + SLJIT_COMPILE_ASSERT(reg_map[SLJIT_SAVED_EREG2] >= 8, saved_ereg2_is_hireg); + *inst++ = REX_B; + PUSH_REG(reg_lmap[SLJIT_SAVED_EREG2]); + } + if (saveds >= 4) { + SLJIT_COMPILE_ASSERT(reg_map[SLJIT_SAVED_EREG1] >= 8, saved_ereg1_is_hireg); + *inst++ = REX_B; + PUSH_REG(reg_lmap[SLJIT_SAVED_EREG1]); + } + if (saveds >= 3) { +#ifndef _WIN64 + SLJIT_COMPILE_ASSERT(reg_map[SLJIT_SAVED_REG3] >= 8, saved_reg3_is_hireg); + *inst++ = REX_B; +#else + SLJIT_COMPILE_ASSERT(reg_map[SLJIT_SAVED_REG3] < 8, saved_reg3_is_loreg); +#endif + PUSH_REG(reg_lmap[SLJIT_SAVED_REG3]); + } + if (saveds >= 2) { +#ifndef _WIN64 + SLJIT_COMPILE_ASSERT(reg_map[SLJIT_SAVED_REG2] >= 8, saved_reg2_is_hireg); + *inst++ = REX_B; +#else + SLJIT_COMPILE_ASSERT(reg_map[SLJIT_SAVED_REG2] < 8, saved_reg2_is_loreg); +#endif + PUSH_REG(reg_lmap[SLJIT_SAVED_REG2]); + } + if (saveds >= 1) { + SLJIT_COMPILE_ASSERT(reg_map[SLJIT_SAVED_REG1] < 8, saved_reg1_is_loreg); + PUSH_REG(reg_lmap[SLJIT_SAVED_REG1]); + } +#ifdef _WIN64 + if (scratches >= 5) { + SLJIT_COMPILE_ASSERT(reg_map[SLJIT_TEMPORARY_EREG2] >= 8, temporary_ereg2_is_hireg); + *inst++ = REX_B; + PUSH_REG(reg_lmap[SLJIT_TEMPORARY_EREG2]); + } +#endif + +#ifndef _WIN64 + if (args > 0) { + *inst++ = REX_W; + *inst++ = MOV_r_rm; + *inst++ = MOD_REG | (reg_map[SLJIT_SAVED_REG1] << 3) | 0x7 /* rdi */; + } + if (args > 1) { + *inst++ = REX_W | REX_R; + *inst++ = MOV_r_rm; + *inst++ = MOD_REG | (reg_lmap[SLJIT_SAVED_REG2] << 3) | 0x6 /* rsi */; + } + if (args > 2) { + *inst++ = REX_W | REX_R; + *inst++ = MOV_r_rm; + *inst++ = MOD_REG | (reg_lmap[SLJIT_SAVED_REG3] << 3) | 0x2 /* rdx */; + } +#else + if (args > 0) { + *inst++ = REX_W; + *inst++ = MOV_r_rm; + *inst++ = MOD_REG | (reg_map[SLJIT_SAVED_REG1] << 3) | 0x1 /* rcx */; + } + if (args > 1) { + *inst++ = REX_W; + *inst++ = MOV_r_rm; + *inst++ = MOD_REG | (reg_map[SLJIT_SAVED_REG2] << 3) | 0x2 /* rdx */; + } + if (args > 2) { + *inst++ = REX_W | REX_B; + *inst++ = MOV_r_rm; + *inst++ = MOD_REG | (reg_map[SLJIT_SAVED_REG3] << 3) | 0x0 /* r8 */; + } +#endif + } + + local_size = ((local_size + FIXED_LOCALS_OFFSET + pushed_size + 16 - 1) & ~(16 - 1)) - pushed_size; + compiler->local_size = local_size; +#ifdef _WIN64 + if (local_size > 1024) { + /* Allocate stack for the callback, which grows the stack. */ + inst = (sljit_ub*)ensure_buf(compiler, 1 + 4 + (3 + sizeof(sljit_si))); + FAIL_IF(!inst); + INC_SIZE(4 + (3 + sizeof(sljit_si))); + *inst++ = REX_W; + *inst++ = GROUP_BINARY_83; + *inst++ = MOD_REG | SUB | 4; + /* Pushed size must be divisible by 8. */ + SLJIT_ASSERT(!(pushed_size & 0x7)); + if (pushed_size & 0x8) { + *inst++ = 5 * sizeof(sljit_sw); + local_size -= 5 * sizeof(sljit_sw); + } else { + *inst++ = 4 * sizeof(sljit_sw); + local_size -= 4 * sizeof(sljit_sw); + } + /* Second instruction */ + SLJIT_COMPILE_ASSERT(reg_map[SLJIT_SCRATCH_REG1] < 8, temporary_reg1_is_loreg); + *inst++ = REX_W; + *inst++ = MOV_rm_i32; + *inst++ = MOD_REG | reg_lmap[SLJIT_SCRATCH_REG1]; + *(sljit_si*)inst = local_size; +#if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) || (defined SLJIT_DEBUG && SLJIT_DEBUG) + compiler->skip_checks = 1; +#endif + FAIL_IF(sljit_emit_ijump(compiler, SLJIT_CALL1, SLJIT_IMM, SLJIT_FUNC_OFFSET(sljit_grow_stack))); + } +#endif + SLJIT_ASSERT(local_size > 0); + if (local_size <= 127) { + inst = (sljit_ub*)ensure_buf(compiler, 1 + 4); + FAIL_IF(!inst); + INC_SIZE(4); + *inst++ = REX_W; + *inst++ = GROUP_BINARY_83; + *inst++ = MOD_REG | SUB | 4; + *inst++ = local_size; + } + else { + inst = (sljit_ub*)ensure_buf(compiler, 1 + 7); + FAIL_IF(!inst); + INC_SIZE(7); + *inst++ = REX_W; + *inst++ = GROUP_BINARY_81; + *inst++ = MOD_REG | SUB | 4; + *(sljit_si*)inst = local_size; + inst += sizeof(sljit_si); + } +#ifdef _WIN64 + /* Save xmm6 with MOVAPS instruction. */ + inst = (sljit_ub*)ensure_buf(compiler, 1 + 5); + FAIL_IF(!inst); + INC_SIZE(5); + *inst++ = GROUP_0F; + *(sljit_si*)inst = 0x20247429; +#endif + + return SLJIT_SUCCESS; +} + +SLJIT_API_FUNC_ATTRIBUTE void sljit_set_context(struct sljit_compiler *compiler, sljit_si args, sljit_si scratches, sljit_si saveds, sljit_si local_size) +{ + sljit_si pushed_size; + + CHECK_ERROR_VOID(); + check_sljit_set_context(compiler, args, scratches, saveds, local_size); + + compiler->scratches = scratches; + compiler->saveds = saveds; +#if (defined SLJIT_DEBUG && SLJIT_DEBUG) + compiler->logical_local_size = local_size; +#endif + + /* Including the return address saved by the call instruction. */ + pushed_size = (saveds + 1) * sizeof(sljit_sw); +#ifdef _WIN64 + if (scratches >= 5) + pushed_size += sizeof(sljit_sw); +#endif + compiler->local_size = ((local_size + FIXED_LOCALS_OFFSET + pushed_size + 16 - 1) & ~(16 - 1)) - pushed_size; +} + +SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_return(struct sljit_compiler *compiler, sljit_si op, sljit_si src, sljit_sw srcw) +{ + sljit_si size; + sljit_ub *inst; + + CHECK_ERROR(); + check_sljit_emit_return(compiler, op, src, srcw); + + compiler->flags_saved = 0; + FAIL_IF(emit_mov_before_return(compiler, op, src, srcw)); + +#ifdef _WIN64 + /* Restore xmm6 with MOVAPS instruction. */ + inst = (sljit_ub*)ensure_buf(compiler, 1 + 5); + FAIL_IF(!inst); + INC_SIZE(5); + *inst++ = GROUP_0F; + *(sljit_si*)inst = 0x20247428; +#endif + SLJIT_ASSERT(compiler->local_size > 0); + if (compiler->local_size <= 127) { + inst = (sljit_ub*)ensure_buf(compiler, 1 + 4); + FAIL_IF(!inst); + INC_SIZE(4); + *inst++ = REX_W; + *inst++ = GROUP_BINARY_83; + *inst++ = MOD_REG | ADD | 4; + *inst = compiler->local_size; + } + else { + inst = (sljit_ub*)ensure_buf(compiler, 1 + 7); + FAIL_IF(!inst); + INC_SIZE(7); + *inst++ = REX_W; + *inst++ = GROUP_BINARY_81; + *inst++ = MOD_REG | ADD | 4; + *(sljit_si*)inst = compiler->local_size; + } + + size = 1 + compiler->saveds; +#ifndef _WIN64 + if (compiler->saveds >= 2) + size += compiler->saveds - 1; +#else + if (compiler->saveds >= 4) + size += compiler->saveds - 3; + if (compiler->scratches >= 5) + size += (5 - 4) * 2; +#endif + inst = (sljit_ub*)ensure_buf(compiler, 1 + size); + FAIL_IF(!inst); + + INC_SIZE(size); + +#ifdef _WIN64 + if (compiler->scratches >= 5) { + *inst++ = REX_B; + POP_REG(reg_lmap[SLJIT_TEMPORARY_EREG2]); + } +#endif + if (compiler->saveds >= 1) + POP_REG(reg_map[SLJIT_SAVED_REG1]); + if (compiler->saveds >= 2) { +#ifndef _WIN64 + *inst++ = REX_B; +#endif + POP_REG(reg_lmap[SLJIT_SAVED_REG2]); + } + if (compiler->saveds >= 3) { +#ifndef _WIN64 + *inst++ = REX_B; +#endif + POP_REG(reg_lmap[SLJIT_SAVED_REG3]); + } + if (compiler->saveds >= 4) { + *inst++ = REX_B; + POP_REG(reg_lmap[SLJIT_SAVED_EREG1]); + } + if (compiler->saveds >= 5) { + *inst++ = REX_B; + POP_REG(reg_lmap[SLJIT_SAVED_EREG2]); + } + + RET(); + return SLJIT_SUCCESS; +} + +/* --------------------------------------------------------------------- */ +/* Operators */ +/* --------------------------------------------------------------------- */ + +static sljit_si emit_do_imm32(struct sljit_compiler *compiler, sljit_ub rex, sljit_ub opcode, sljit_sw imm) +{ + sljit_ub *inst; + sljit_si length = 1 + (rex ? 1 : 0) + sizeof(sljit_si); + + inst = (sljit_ub*)ensure_buf(compiler, 1 + length); + FAIL_IF(!inst); + INC_SIZE(length); + if (rex) + *inst++ = rex; + *inst++ = opcode; + *(sljit_si*)inst = imm; + return SLJIT_SUCCESS; +} + +static sljit_ub* emit_x86_instruction(struct sljit_compiler *compiler, sljit_si size, + /* The register or immediate operand. */ + sljit_si a, sljit_sw imma, + /* The general operand (not immediate). */ + sljit_si b, sljit_sw immb) +{ + sljit_ub *inst; + sljit_ub *buf_ptr; + sljit_ub rex = 0; + sljit_si flags = size & ~0xf; + sljit_si inst_size; + + /* The immediate operand must be 32 bit. */ + SLJIT_ASSERT(!(a & SLJIT_IMM) || compiler->mode32 || IS_HALFWORD(imma)); + /* Both cannot be switched on. */ + SLJIT_ASSERT((flags & (EX86_BIN_INS | EX86_SHIFT_INS)) != (EX86_BIN_INS | EX86_SHIFT_INS)); + /* Size flags not allowed for typed instructions. */ + SLJIT_ASSERT(!(flags & (EX86_BIN_INS | EX86_SHIFT_INS)) || (flags & (EX86_BYTE_ARG | EX86_HALF_ARG)) == 0); + /* Both size flags cannot be switched on. */ + SLJIT_ASSERT((flags & (EX86_BYTE_ARG | EX86_HALF_ARG)) != (EX86_BYTE_ARG | EX86_HALF_ARG)); +#if (defined SLJIT_SSE2 && SLJIT_SSE2) + /* SSE2 and immediate is not possible. */ + SLJIT_ASSERT(!(a & SLJIT_IMM) || !(flags & EX86_SSE2)); + SLJIT_ASSERT((flags & (EX86_PREF_F2 | EX86_PREF_F3)) != (EX86_PREF_F2 | EX86_PREF_F3) + && (flags & (EX86_PREF_F2 | EX86_PREF_66)) != (EX86_PREF_F2 | EX86_PREF_66) + && (flags & (EX86_PREF_F3 | EX86_PREF_66)) != (EX86_PREF_F3 | EX86_PREF_66)); +#endif + + size &= 0xf; + inst_size = size; + + if ((b & SLJIT_MEM) && !(b & OFFS_REG_MASK) && NOT_HALFWORD(immb)) { + if (emit_load_imm64(compiler, TMP_REG3, immb)) + return NULL; + immb = 0; + if (b & REG_MASK) + b |= TO_OFFS_REG(TMP_REG3); + else + b |= TMP_REG3; + } + + if (!compiler->mode32 && !(flags & EX86_NO_REXW)) + rex |= REX_W; + else if (flags & EX86_REX) + rex |= REX; + +#if (defined SLJIT_SSE2 && SLJIT_SSE2) + if (flags & (EX86_PREF_F2 | EX86_PREF_F3)) + inst_size++; +#endif + if (flags & EX86_PREF_66) + inst_size++; + + /* Calculate size of b. */ + inst_size += 1; /* mod r/m byte. */ + if (b & SLJIT_MEM) { + if ((b & REG_MASK) == SLJIT_UNUSED) + inst_size += 1 + sizeof(sljit_si); /* SIB byte required to avoid RIP based addressing. */ + else { + if (reg_map[b & REG_MASK] >= 8) + rex |= REX_B; + if (immb != 0 && !(b & OFFS_REG_MASK)) { + /* Immediate operand. */ + if (immb <= 127 && immb >= -128) + inst_size += sizeof(sljit_sb); + else + inst_size += sizeof(sljit_si); + } + } + + if ((b & REG_MASK) == SLJIT_LOCALS_REG && !(b & OFFS_REG_MASK)) + b |= TO_OFFS_REG(SLJIT_LOCALS_REG); + + if ((b & OFFS_REG_MASK) != SLJIT_UNUSED) { + inst_size += 1; /* SIB byte. */ + if (reg_map[OFFS_REG(b)] >= 8) + rex |= REX_X; + } + } +#if (defined SLJIT_SSE2 && SLJIT_SSE2) + else if (!(flags & EX86_SSE2) && reg_map[b] >= 8) + rex |= REX_B; +#else + else if (reg_map[b] >= 8) + rex |= REX_B; +#endif + + if (a & SLJIT_IMM) { + if (flags & EX86_BIN_INS) { + if (imma <= 127 && imma >= -128) { + inst_size += 1; + flags |= EX86_BYTE_ARG; + } else + inst_size += 4; + } + else if (flags & EX86_SHIFT_INS) { + imma &= compiler->mode32 ? 0x1f : 0x3f; + if (imma != 1) { + inst_size ++; + flags |= EX86_BYTE_ARG; + } + } else if (flags & EX86_BYTE_ARG) + inst_size++; + else if (flags & EX86_HALF_ARG) + inst_size += sizeof(short); + else + inst_size += sizeof(sljit_si); + } + else { + SLJIT_ASSERT(!(flags & EX86_SHIFT_INS) || a == SLJIT_PREF_SHIFT_REG); + /* reg_map[SLJIT_PREF_SHIFT_REG] is less than 8. */ +#if (defined SLJIT_SSE2 && SLJIT_SSE2) + if (!(flags & EX86_SSE2) && reg_map[a] >= 8) + rex |= REX_R; +#else + if (reg_map[a] >= 8) + rex |= REX_R; +#endif + } + + if (rex) + inst_size++; + + inst = (sljit_ub*)ensure_buf(compiler, 1 + inst_size); + PTR_FAIL_IF(!inst); + + /* Encoding the byte. */ + INC_SIZE(inst_size); +#if (defined SLJIT_SSE2 && SLJIT_SSE2) + if (flags & EX86_PREF_F2) + *inst++ = 0xf2; + if (flags & EX86_PREF_F3) + *inst++ = 0xf3; +#endif + if (flags & EX86_PREF_66) + *inst++ = 0x66; + if (rex) + *inst++ = rex; + buf_ptr = inst + size; + + /* Encode mod/rm byte. */ + if (!(flags & EX86_SHIFT_INS)) { + if ((flags & EX86_BIN_INS) && (a & SLJIT_IMM)) + *inst = (flags & EX86_BYTE_ARG) ? GROUP_BINARY_83 : GROUP_BINARY_81; + + if ((a & SLJIT_IMM) || (a == 0)) + *buf_ptr = 0; +#if (defined SLJIT_SSE2 && SLJIT_SSE2) + else if (!(flags & EX86_SSE2)) + *buf_ptr = reg_lmap[a] << 3; + else + *buf_ptr = a << 3; +#else + else + *buf_ptr = reg_lmap[a] << 3; +#endif + } + else { + if (a & SLJIT_IMM) { + if (imma == 1) + *inst = GROUP_SHIFT_1; + else + *inst = GROUP_SHIFT_N; + } else + *inst = GROUP_SHIFT_CL; + *buf_ptr = 0; + } + + if (!(b & SLJIT_MEM)) +#if (defined SLJIT_SSE2 && SLJIT_SSE2) + *buf_ptr++ |= MOD_REG + ((!(flags & EX86_SSE2)) ? reg_lmap[b] : b); +#else + *buf_ptr++ |= MOD_REG + reg_lmap[b]; +#endif + else if ((b & REG_MASK) != SLJIT_UNUSED) { + if ((b & OFFS_REG_MASK) == SLJIT_UNUSED || (b & OFFS_REG_MASK) == TO_OFFS_REG(SLJIT_LOCALS_REG)) { + if (immb != 0) { + if (immb <= 127 && immb >= -128) + *buf_ptr |= 0x40; + else + *buf_ptr |= 0x80; + } + + if ((b & OFFS_REG_MASK) == SLJIT_UNUSED) + *buf_ptr++ |= reg_lmap[b & REG_MASK]; + else { + *buf_ptr++ |= 0x04; + *buf_ptr++ = reg_lmap[b & REG_MASK] | (reg_lmap[OFFS_REG(b)] << 3); + } + + if (immb != 0) { + if (immb <= 127 && immb >= -128) + *buf_ptr++ = immb; /* 8 bit displacement. */ + else { + *(sljit_si*)buf_ptr = immb; /* 32 bit displacement. */ + buf_ptr += sizeof(sljit_si); + } + } + } + else { + *buf_ptr++ |= 0x04; + *buf_ptr++ = reg_lmap[b & REG_MASK] | (reg_lmap[OFFS_REG(b)] << 3) | (immb << 6); + } + } + else { + *buf_ptr++ |= 0x04; + *buf_ptr++ = 0x25; + *(sljit_si*)buf_ptr = immb; /* 32 bit displacement. */ + buf_ptr += sizeof(sljit_si); + } + + if (a & SLJIT_IMM) { + if (flags & EX86_BYTE_ARG) + *buf_ptr = imma; + else if (flags & EX86_HALF_ARG) + *(short*)buf_ptr = imma; + else if (!(flags & EX86_SHIFT_INS)) + *(sljit_si*)buf_ptr = imma; + } + + return !(flags & EX86_SHIFT_INS) ? inst : (inst + 1); +} + +/* --------------------------------------------------------------------- */ +/* Call / return instructions */ +/* --------------------------------------------------------------------- */ + +static SLJIT_INLINE sljit_si call_with_args(struct sljit_compiler *compiler, sljit_si type) +{ + sljit_ub *inst; + +#ifndef _WIN64 + SLJIT_COMPILE_ASSERT(reg_map[SLJIT_SCRATCH_REG2] == 6 && reg_map[SLJIT_SCRATCH_REG1] < 8 && reg_map[SLJIT_SCRATCH_REG3] < 8, args_registers); + + inst = (sljit_ub*)ensure_buf(compiler, 1 + ((type < SLJIT_CALL3) ? 3 : 6)); + FAIL_IF(!inst); + INC_SIZE((type < SLJIT_CALL3) ? 3 : 6); + if (type >= SLJIT_CALL3) { + *inst++ = REX_W; + *inst++ = MOV_r_rm; + *inst++ = MOD_REG | (0x2 /* rdx */ << 3) | reg_lmap[SLJIT_SCRATCH_REG3]; + } + *inst++ = REX_W; + *inst++ = MOV_r_rm; + *inst++ = MOD_REG | (0x7 /* rdi */ << 3) | reg_lmap[SLJIT_SCRATCH_REG1]; +#else + SLJIT_COMPILE_ASSERT(reg_map[SLJIT_SCRATCH_REG2] == 2 && reg_map[SLJIT_SCRATCH_REG1] < 8 && reg_map[SLJIT_SCRATCH_REG3] < 8, args_registers); + + inst = (sljit_ub*)ensure_buf(compiler, 1 + ((type < SLJIT_CALL3) ? 3 : 6)); + FAIL_IF(!inst); + INC_SIZE((type < SLJIT_CALL3) ? 3 : 6); + if (type >= SLJIT_CALL3) { + *inst++ = REX_W | REX_R; + *inst++ = MOV_r_rm; + *inst++ = MOD_REG | (0x0 /* r8 */ << 3) | reg_lmap[SLJIT_SCRATCH_REG3]; + } + *inst++ = REX_W; + *inst++ = MOV_r_rm; + *inst++ = MOD_REG | (0x1 /* rcx */ << 3) | reg_lmap[SLJIT_SCRATCH_REG1]; +#endif + return SLJIT_SUCCESS; +} + +SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_fast_enter(struct sljit_compiler *compiler, sljit_si dst, sljit_sw dstw) +{ + sljit_ub *inst; + + CHECK_ERROR(); + check_sljit_emit_fast_enter(compiler, dst, dstw); + ADJUST_LOCAL_OFFSET(dst, dstw); + + /* For UNUSED dst. Uncommon, but possible. */ + if (dst == SLJIT_UNUSED) + dst = TMP_REG1; + + if (FAST_IS_REG(dst)) { + if (reg_map[dst] < 8) { + inst = (sljit_ub*)ensure_buf(compiler, 1 + 1); + FAIL_IF(!inst); + INC_SIZE(1); + POP_REG(reg_lmap[dst]); + return SLJIT_SUCCESS; + } + + inst = (sljit_ub*)ensure_buf(compiler, 1 + 2); + FAIL_IF(!inst); + INC_SIZE(2); + *inst++ = REX_B; + POP_REG(reg_lmap[dst]); + return SLJIT_SUCCESS; + } + + /* REX_W is not necessary (src is not immediate). */ + compiler->mode32 = 1; + inst = emit_x86_instruction(compiler, 1, 0, 0, dst, dstw); + FAIL_IF(!inst); + *inst++ = POP_rm; + return SLJIT_SUCCESS; +} + +SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_fast_return(struct sljit_compiler *compiler, sljit_si src, sljit_sw srcw) +{ + sljit_ub *inst; + + CHECK_ERROR(); + check_sljit_emit_fast_return(compiler, src, srcw); + ADJUST_LOCAL_OFFSET(src, srcw); + + if ((src & SLJIT_IMM) && NOT_HALFWORD(srcw)) { + FAIL_IF(emit_load_imm64(compiler, TMP_REG1, srcw)); + src = TMP_REG1; + } + + if (FAST_IS_REG(src)) { + if (reg_map[src] < 8) { + inst = (sljit_ub*)ensure_buf(compiler, 1 + 1 + 1); + FAIL_IF(!inst); + + INC_SIZE(1 + 1); + PUSH_REG(reg_lmap[src]); + } + else { + inst = (sljit_ub*)ensure_buf(compiler, 1 + 2 + 1); + FAIL_IF(!inst); + + INC_SIZE(2 + 1); + *inst++ = REX_B; + PUSH_REG(reg_lmap[src]); + } + } + else if (src & SLJIT_MEM) { + /* REX_W is not necessary (src is not immediate). */ + compiler->mode32 = 1; + inst = emit_x86_instruction(compiler, 1, 0, 0, src, srcw); + FAIL_IF(!inst); + *inst++ = GROUP_FF; + *inst |= PUSH_rm; + + inst = (sljit_ub*)ensure_buf(compiler, 1 + 1); + FAIL_IF(!inst); + INC_SIZE(1); + } + else { + SLJIT_ASSERT(IS_HALFWORD(srcw)); + /* SLJIT_IMM. */ + inst = (sljit_ub*)ensure_buf(compiler, 1 + 5 + 1); + FAIL_IF(!inst); + + INC_SIZE(5 + 1); + *inst++ = PUSH_i32; + *(sljit_si*)inst = srcw; + inst += sizeof(sljit_si); + } + + RET(); + return SLJIT_SUCCESS; +} + + +/* --------------------------------------------------------------------- */ +/* Extend input */ +/* --------------------------------------------------------------------- */ + +static sljit_si emit_mov_int(struct sljit_compiler *compiler, sljit_si sign, + sljit_si dst, sljit_sw dstw, + sljit_si src, sljit_sw srcw) +{ + sljit_ub* inst; + sljit_si dst_r; + + compiler->mode32 = 0; + + if (dst == SLJIT_UNUSED && !(src & SLJIT_MEM)) + return SLJIT_SUCCESS; /* Empty instruction. */ + + if (src & SLJIT_IMM) { + if (FAST_IS_REG(dst)) { + if (sign || ((sljit_uw)srcw <= 0x7fffffff)) { + inst = emit_x86_instruction(compiler, 1, SLJIT_IMM, (sljit_sw)(sljit_si)srcw, dst, dstw); + FAIL_IF(!inst); + *inst = MOV_rm_i32; + return SLJIT_SUCCESS; + } + return emit_load_imm64(compiler, dst, srcw); + } + compiler->mode32 = 1; + inst = emit_x86_instruction(compiler, 1, SLJIT_IMM, (sljit_sw)(sljit_si)srcw, dst, dstw); + FAIL_IF(!inst); + *inst = MOV_rm_i32; + compiler->mode32 = 0; + return SLJIT_SUCCESS; + } + + dst_r = FAST_IS_REG(dst) ? dst : TMP_REG1; + + if ((dst & SLJIT_MEM) && FAST_IS_REG(src)) + dst_r = src; + else { + if (sign) { + inst = emit_x86_instruction(compiler, 1, dst_r, 0, src, srcw); + FAIL_IF(!inst); + *inst++ = MOVSXD_r_rm; + } else { + compiler->mode32 = 1; + FAIL_IF(emit_mov(compiler, dst_r, 0, src, srcw)); + compiler->mode32 = 0; + } + } + + if (dst & SLJIT_MEM) { + compiler->mode32 = 1; + inst = emit_x86_instruction(compiler, 1, dst_r, 0, dst, dstw); + FAIL_IF(!inst); + *inst = MOV_rm_r; + compiler->mode32 = 0; + } + + return SLJIT_SUCCESS; +} |