| /* |
| * 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 options, sljit_si args, sljit_si scratches, sljit_si saveds, |
| sljit_si fscratches, sljit_si fsaveds, sljit_si local_size) |
| { |
| sljit_si i, tmp, size, saved_register_size; |
| sljit_ub *inst; |
| |
| CHECK_ERROR(); |
| CHECK(check_sljit_emit_enter(compiler, options, args, scratches, saveds, fscratches, fsaveds, local_size)); |
| set_emit_enter(compiler, options, args, scratches, saveds, fscratches, fsaveds, local_size); |
| |
| compiler->flags_saved = 0; |
| |
| /* Including the return address saved by the call instruction. */ |
| saved_register_size = GET_SAVED_REGISTERS_SIZE(scratches, saveds, 1); |
| |
| tmp = saveds < SLJIT_NUMBER_OF_SAVED_REGISTERS ? (SLJIT_S0 + 1 - saveds) : SLJIT_FIRST_SAVED_REG; |
| for (i = SLJIT_S0; i >= tmp; i--) { |
| size = reg_map[i] >= 8 ? 2 : 1; |
| inst = (sljit_ub*)ensure_buf(compiler, 1 + size); |
| FAIL_IF(!inst); |
| INC_SIZE(size); |
| if (reg_map[i] >= 8) |
| *inst++ = REX_B; |
| PUSH_REG(reg_lmap[i]); |
| } |
| |
| for (i = scratches; i >= SLJIT_FIRST_SAVED_REG; i--) { |
| size = reg_map[i] >= 8 ? 2 : 1; |
| inst = (sljit_ub*)ensure_buf(compiler, 1 + size); |
| FAIL_IF(!inst); |
| INC_SIZE(size); |
| if (reg_map[i] >= 8) |
| *inst++ = REX_B; |
| PUSH_REG(reg_lmap[i]); |
| } |
| |
| if (args > 0) { |
| size = args * 3; |
| inst = (sljit_ub*)ensure_buf(compiler, 1 + size); |
| FAIL_IF(!inst); |
| |
| INC_SIZE(size); |
| |
| #ifndef _WIN64 |
| if (args > 0) { |
| *inst++ = REX_W; |
| *inst++ = MOV_r_rm; |
| *inst++ = MOD_REG | (reg_map[SLJIT_S0] << 3) | 0x7 /* rdi */; |
| } |
| if (args > 1) { |
| *inst++ = REX_W | REX_R; |
| *inst++ = MOV_r_rm; |
| *inst++ = MOD_REG | (reg_lmap[SLJIT_S1] << 3) | 0x6 /* rsi */; |
| } |
| if (args > 2) { |
| *inst++ = REX_W | REX_R; |
| *inst++ = MOV_r_rm; |
| *inst++ = MOD_REG | (reg_lmap[SLJIT_S2] << 3) | 0x2 /* rdx */; |
| } |
| #else |
| if (args > 0) { |
| *inst++ = REX_W; |
| *inst++ = MOV_r_rm; |
| *inst++ = MOD_REG | (reg_map[SLJIT_S0] << 3) | 0x1 /* rcx */; |
| } |
| if (args > 1) { |
| *inst++ = REX_W; |
| *inst++ = MOV_r_rm; |
| *inst++ = MOD_REG | (reg_map[SLJIT_S1] << 3) | 0x2 /* rdx */; |
| } |
| if (args > 2) { |
| *inst++ = REX_W | REX_B; |
| *inst++ = MOV_r_rm; |
| *inst++ = MOD_REG | (reg_map[SLJIT_S2] << 3) | 0x0 /* r8 */; |
| } |
| #endif |
| } |
| |
| local_size = ((local_size + SLJIT_LOCALS_OFFSET + saved_register_size + 15) & ~15) - saved_register_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; |
| /* Allocated size for registers must be divisible by 8. */ |
| SLJIT_ASSERT(!(saved_register_size & 0x7)); |
| /* Aligned to 16 byte. */ |
| if (saved_register_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_R0] < 8, temporary_reg1_is_loreg); |
| *inst++ = REX_W; |
| *inst++ = MOV_rm_i32; |
| *inst++ = MOD_REG | reg_lmap[SLJIT_R0]; |
| *(sljit_si*)inst = local_size; |
| #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \ |
| || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS) |
| 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 register: movaps [rsp + 0x20], xmm6 */ |
| if (fscratches >= 6 || fsaveds >= 1) { |
| 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 sljit_si sljit_set_context(struct sljit_compiler *compiler, |
| sljit_si options, sljit_si args, sljit_si scratches, sljit_si saveds, |
| sljit_si fscratches, sljit_si fsaveds, sljit_si local_size) |
| { |
| sljit_si saved_register_size; |
| |
| CHECK_ERROR(); |
| CHECK(check_sljit_set_context(compiler, options, args, scratches, saveds, fscratches, fsaveds, local_size)); |
| set_set_context(compiler, options, args, scratches, saveds, fscratches, fsaveds, local_size); |
| |
| /* Including the return address saved by the call instruction. */ |
| saved_register_size = GET_SAVED_REGISTERS_SIZE(scratches, saveds, 1); |
| compiler->local_size = ((local_size + SLJIT_LOCALS_OFFSET + saved_register_size + 15) & ~15) - saved_register_size; |
| return SLJIT_SUCCESS; |
| } |
| |
| SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_return(struct sljit_compiler *compiler, sljit_si op, sljit_si src, sljit_sw srcw) |
| { |
| sljit_si i, tmp, size; |
| sljit_ub *inst; |
| |
| CHECK_ERROR(); |
| CHECK(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 register: movaps xmm6, [rsp + 0x20] */ |
| if (compiler->fscratches >= 6 || compiler->fsaveds >= 1) { |
| 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; |
| } |
| |
| tmp = compiler->scratches; |
| for (i = SLJIT_FIRST_SAVED_REG; i <= tmp; i++) { |
| size = reg_map[i] >= 8 ? 2 : 1; |
| inst = (sljit_ub*)ensure_buf(compiler, 1 + size); |
| FAIL_IF(!inst); |
| INC_SIZE(size); |
| if (reg_map[i] >= 8) |
| *inst++ = REX_B; |
| POP_REG(reg_lmap[i]); |
| } |
| |
| tmp = compiler->saveds < SLJIT_NUMBER_OF_SAVED_REGISTERS ? (SLJIT_S0 + 1 - compiler->saveds) : SLJIT_FIRST_SAVED_REG; |
| for (i = tmp; i <= SLJIT_S0; i++) { |
| size = reg_map[i] >= 8 ? 2 : 1; |
| inst = (sljit_ub*)ensure_buf(compiler, 1 + size); |
| FAIL_IF(!inst); |
| INC_SIZE(size); |
| if (reg_map[i] >= 8) |
| *inst++ = REX_B; |
| POP_REG(reg_lmap[i]); |
| } |
| |
| inst = (sljit_ub*)ensure_buf(compiler, 1 + 1); |
| FAIL_IF(!inst); |
| INC_SIZE(1); |
| 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)); |
| /* 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)); |
| |
| size &= 0xf; |
| inst_size = size; |
| |
| if (!compiler->mode32 && !(flags & EX86_NO_REXW)) |
| rex |= REX_W; |
| else if (flags & EX86_REX) |
| rex |= REX; |
| |
| if (flags & (EX86_PREF_F2 | EX86_PREF_F3)) |
| inst_size++; |
| if (flags & EX86_PREF_66) |
| inst_size++; |
| |
| /* Calculate size of b. */ |
| inst_size += 1; /* mod r/m byte. */ |
| if (b & SLJIT_MEM) { |
| if (!(b & OFFS_REG_MASK)) { |
| if (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; |
| } |
| else if (reg_lmap[b & REG_MASK] == 4) |
| b |= TO_OFFS_REG(SLJIT_SP); |
| } |
| |
| 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) || (b & OFFS_REG_MASK) == TO_OFFS_REG(SLJIT_SP))) { |
| /* Immediate operand. */ |
| if (immb <= 127 && immb >= -128) |
| inst_size += sizeof(sljit_sb); |
| else |
| inst_size += sizeof(sljit_si); |
| } |
| else if (reg_lmap[b & REG_MASK] == 5) |
| inst_size += sizeof(sljit_sb); |
| |
| if ((b & OFFS_REG_MASK) != SLJIT_UNUSED) { |
| inst_size += 1; /* SIB byte. */ |
| if (reg_map[OFFS_REG(b)] >= 8) |
| rex |= REX_X; |
| } |
| } |
| } |
| else if (!(flags & EX86_SSE2_OP2) && reg_map[b] >= 8) |
| rex |= REX_B; |
| |
| 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 (!(flags & EX86_SSE2_OP1) && reg_map[a] >= 8) |
| rex |= REX_R; |
| } |
| |
| 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 (flags & EX86_PREF_F2) |
| *inst++ = 0xf2; |
| if (flags & EX86_PREF_F3) |
| *inst++ = 0xf3; |
| 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; |
| else if (!(flags & EX86_SSE2_OP1)) |
| *buf_ptr = reg_lmap[a] << 3; |
| else |
| *buf_ptr = a << 3; |
| } |
| 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)) |
| *buf_ptr++ |= MOD_REG + ((!(flags & EX86_SSE2_OP2)) ? reg_lmap[b] : b); |
| else if ((b & REG_MASK) != SLJIT_UNUSED) { |
| if ((b & OFFS_REG_MASK) == SLJIT_UNUSED || (b & OFFS_REG_MASK) == TO_OFFS_REG(SLJIT_SP)) { |
| if (immb != 0 || reg_lmap[b & REG_MASK] == 5) { |
| 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 || reg_lmap[b & REG_MASK] == 5) { |
| 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 { |
| if (reg_lmap[b & REG_MASK] == 5) |
| *buf_ptr |= 0x40; |
| *buf_ptr++ |= 0x04; |
| *buf_ptr++ = reg_lmap[b & REG_MASK] | (reg_lmap[OFFS_REG(b)] << 3) | (immb << 6); |
| if (reg_lmap[b & REG_MASK] == 5) |
| *buf_ptr++ = 0; |
| } |
| } |
| 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_R1] == 6 && reg_map[SLJIT_R0] < 8 && reg_map[SLJIT_R2] < 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_R2]; |
| } |
| *inst++ = REX_W; |
| *inst++ = MOV_r_rm; |
| *inst++ = MOD_REG | (0x7 /* rdi */ << 3) | reg_lmap[SLJIT_R0]; |
| #else |
| SLJIT_COMPILE_ASSERT(reg_map[SLJIT_R1] == 2 && reg_map[SLJIT_R0] < 8 && reg_map[SLJIT_R2] < 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_R2]; |
| } |
| *inst++ = REX_W; |
| *inst++ = MOV_r_rm; |
| *inst++ = MOD_REG | (0x1 /* rcx */ << 3) | reg_lmap[SLJIT_R0]; |
| #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(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(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; |
| } |