| /* |
| * Stack-less Just-In-Time compiler |
| * |
| * Copyright 2009-2010 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 int emit_load_imm64(struct sljit_compiler *compiler, int reg, sljit_w imm) |
| { |
| sljit_ub *buf; |
| |
| buf = (sljit_ub*)ensure_buf(compiler, 1 + 2 + sizeof(sljit_w)); |
| FAIL_IF(!buf); |
| INC_SIZE(2 + sizeof(sljit_w)); |
| *buf++ = REX_W | ((reg_map[reg] <= 7) ? 0 : REX_B); |
| *buf++ = 0xb8 + (reg_map[reg] & 0x7); |
| *(sljit_w*)buf = imm; |
| return SLJIT_SUCCESS; |
| } |
| |
| static sljit_ub* generate_far_jump_code(struct sljit_jump *jump, sljit_ub *code_ptr, int type) |
| { |
| if (type < SLJIT_JUMP) { |
| *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++ = 0xb8 + 1; |
| jump->addr = (sljit_uw)code_ptr; |
| |
| if (jump->flags & JUMP_LABEL) |
| jump->flags |= PATCH_MD; |
| else |
| *(sljit_w*)code_ptr = jump->u.target; |
| |
| code_ptr += sizeof(sljit_w); |
| *code_ptr++ = REX_B; |
| *code_ptr++ = 0xff; |
| *code_ptr++ = (type >= SLJIT_FAST_CALL) ? 0xd1 /* call */ : 0xe1 /* jmp */; |
| |
| return code_ptr; |
| } |
| |
| static sljit_ub* generate_fixed_jump(sljit_ub *code_ptr, sljit_w addr, int type) |
| { |
| sljit_w delta = addr - ((sljit_w)code_ptr + 1 + sizeof(sljit_hw)); |
| |
| if (delta <= SLJIT_W(0x7fffffff) && delta >= SLJIT_W(-0x80000000)) { |
| *code_ptr++ = (type == 2) ? 0xe8 /* call */ : 0xe9 /* jmp */; |
| *(sljit_w*)code_ptr = delta; |
| } |
| else { |
| SLJIT_COMPILE_ASSERT(reg_map[TMP_REG3] == 9, tmp3_is_9_second); |
| *code_ptr++ = REX_W | REX_B; |
| *code_ptr++ = 0xb8 + 1; |
| *(sljit_w*)code_ptr = addr; |
| code_ptr += sizeof(sljit_w); |
| *code_ptr++ = REX_B; |
| *code_ptr++ = 0xff; |
| *code_ptr++ = (type == 2) ? 0xd1 /* call */ : 0xe1 /* jmp */; |
| } |
| |
| return code_ptr; |
| } |
| |
| SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_enter(struct sljit_compiler *compiler, int args, int temporaries, int generals, int local_size) |
| { |
| int size, pushed_size; |
| sljit_ub *buf; |
| |
| CHECK_ERROR(); |
| check_sljit_emit_enter(compiler, args, temporaries, generals, local_size); |
| |
| compiler->temporaries = temporaries; |
| compiler->generals = generals; |
| compiler->flags_saved = 0; |
| |
| size = generals; |
| /* Including the return address saved by the call instruction. */ |
| pushed_size = (generals + 1) * sizeof(sljit_w); |
| #ifndef _WIN64 |
| if (generals >= 2) |
| size += generals - 1; |
| #else |
| /* Saving the virtual stack pointer. */ |
| compiler->has_locals = local_size > 0; |
| if (local_size > 0) { |
| size += 2; |
| pushed_size += sizeof(sljit_w); |
| } |
| if (generals >= 4) |
| size += generals - 3; |
| if (temporaries >= 5) { |
| size += (5 - 4) * 2; |
| pushed_size += sizeof(sljit_w); |
| } |
| #endif |
| size += args * 3; |
| if (size > 0) { |
| buf = (sljit_ub*)ensure_buf(compiler, 1 + size); |
| FAIL_IF(!buf); |
| |
| INC_SIZE(size); |
| if (generals >= 5) { |
| SLJIT_COMPILE_ASSERT(reg_map[SLJIT_GENERAL_EREG2] >= 8, general_ereg2_is_hireg); |
| *buf++ = REX_B; |
| PUSH_REG(reg_lmap[SLJIT_GENERAL_EREG2]); |
| } |
| if (generals >= 4) { |
| SLJIT_COMPILE_ASSERT(reg_map[SLJIT_GENERAL_EREG1] >= 8, general_ereg1_is_hireg); |
| *buf++ = REX_B; |
| PUSH_REG(reg_lmap[SLJIT_GENERAL_EREG1]); |
| } |
| if (generals >= 3) { |
| #ifndef _WIN64 |
| SLJIT_COMPILE_ASSERT(reg_map[SLJIT_GENERAL_REG3] >= 8, general_reg3_is_hireg); |
| *buf++ = REX_B; |
| #else |
| SLJIT_COMPILE_ASSERT(reg_map[SLJIT_GENERAL_REG3] < 8, general_reg3_is_loreg); |
| #endif |
| PUSH_REG(reg_lmap[SLJIT_GENERAL_REG3]); |
| } |
| if (generals >= 2) { |
| #ifndef _WIN64 |
| SLJIT_COMPILE_ASSERT(reg_map[SLJIT_GENERAL_REG2] >= 8, general_reg2_is_hireg); |
| *buf++ = REX_B; |
| #else |
| SLJIT_COMPILE_ASSERT(reg_map[SLJIT_GENERAL_REG2] < 8, general_reg2_is_loreg); |
| #endif |
| PUSH_REG(reg_lmap[SLJIT_GENERAL_REG2]); |
| } |
| if (generals >= 1) { |
| SLJIT_COMPILE_ASSERT(reg_map[SLJIT_GENERAL_REG1] < 8, general_reg1_is_loreg); |
| PUSH_REG(reg_lmap[SLJIT_GENERAL_REG1]); |
| } |
| #ifdef _WIN64 |
| if (temporaries >= 5) { |
| SLJIT_COMPILE_ASSERT(reg_map[SLJIT_TEMPORARY_EREG2] >= 8, temporary_ereg2_is_hireg); |
| *buf++ = REX_B; |
| PUSH_REG(reg_lmap[SLJIT_TEMPORARY_EREG2]); |
| } |
| if (local_size > 0) { |
| SLJIT_COMPILE_ASSERT(reg_map[SLJIT_LOCALS_REG] >= 8, locals_reg_is_hireg); |
| *buf++ = REX_B; |
| PUSH_REG(reg_lmap[SLJIT_LOCALS_REG]); |
| } |
| #endif |
| |
| #ifndef _WIN64 |
| if (args > 0) { |
| *buf++ = REX_W; |
| *buf++ = 0x8b; |
| *buf++ = 0xc0 | (reg_map[SLJIT_GENERAL_REG1] << 3) | 0x7; |
| } |
| if (args > 1) { |
| *buf++ = REX_W | REX_R; |
| *buf++ = 0x8b; |
| *buf++ = 0xc0 | (reg_lmap[SLJIT_GENERAL_REG2] << 3) | 0x6; |
| } |
| if (args > 2) { |
| *buf++ = REX_W | REX_R; |
| *buf++ = 0x8b; |
| *buf++ = 0xc0 | (reg_lmap[SLJIT_GENERAL_REG3] << 3) | 0x2; |
| } |
| #else |
| if (args > 0) { |
| *buf++ = REX_W; |
| *buf++ = 0x8b; |
| *buf++ = 0xc0 | (reg_map[SLJIT_GENERAL_REG1] << 3) | 0x1; |
| } |
| if (args > 1) { |
| *buf++ = REX_W; |
| *buf++ = 0x8b; |
| *buf++ = 0xc0 | (reg_map[SLJIT_GENERAL_REG2] << 3) | 0x2; |
| } |
| if (args > 2) { |
| *buf++ = REX_W | REX_B; |
| *buf++ = 0x8b; |
| *buf++ = 0xc0 | (reg_map[SLJIT_GENERAL_REG3] << 3) | 0x0; |
| } |
| #endif |
| } |
| |
| local_size = ((local_size + pushed_size + 16 - 1) & ~(16 - 1)) - pushed_size; |
| #ifdef _WIN64 |
| local_size += 4 * sizeof(sljit_w); |
| compiler->local_size = local_size; |
| if (local_size > 1024) { |
| /* Allocate the stack for the function itself. */ |
| buf = (sljit_ub*)ensure_buf(compiler, 1 + 4); |
| FAIL_IF(!buf); |
| INC_SIZE(4); |
| *buf++ = REX_W; |
| *buf++ = 0x83; |
| *buf++ = 0xc0 | (5 << 3) | 4; |
| /* Pushed size must be divisible by 8. */ |
| SLJIT_ASSERT(!(pushed_size & 0x7)); |
| if (pushed_size & 0x8) { |
| *buf++ = 5 * sizeof(sljit_w); |
| local_size -= 5 * sizeof(sljit_w); |
| } else { |
| *buf++ = 4 * sizeof(sljit_w); |
| local_size -= 4 * sizeof(sljit_w); |
| } |
| FAIL_IF(emit_load_imm64(compiler, SLJIT_TEMPORARY_REG1, local_size)); |
| FAIL_IF(sljit_emit_ijump(compiler, SLJIT_CALL1, SLJIT_IMM, SLJIT_FUNC_OFFSET(sljit_touch_stack))); |
| } |
| #else |
| compiler->local_size = local_size; |
| if (local_size > 0) { |
| #endif |
| /* In case of Win64, local_size is always > 4 * sizeof(sljit_w) */ |
| if (local_size <= 127) { |
| buf = (sljit_ub*)ensure_buf(compiler, 1 + 4); |
| FAIL_IF(!buf); |
| INC_SIZE(4); |
| *buf++ = REX_W; |
| *buf++ = 0x83; |
| *buf++ = 0xc0 | (5 << 3) | 4; |
| *buf++ = local_size; |
| } |
| else { |
| buf = (sljit_ub*)ensure_buf(compiler, 1 + 7); |
| FAIL_IF(!buf); |
| INC_SIZE(7); |
| *buf++ = REX_W; |
| *buf++ = 0x81; |
| *buf++ = 0xc0 | (5 << 3) | 4; |
| *(sljit_hw*)buf = local_size; |
| buf += sizeof(sljit_hw); |
| } |
| #ifndef _WIN64 |
| } |
| #endif |
| |
| #ifdef _WIN64 |
| if (compiler->has_locals) { |
| buf = (sljit_ub*)ensure_buf(compiler, 1 + 5); |
| FAIL_IF(!buf); |
| INC_SIZE(5); |
| *buf++ = REX_W | REX_R; |
| *buf++ = 0x8d; |
| *buf++ = 0x40 | (reg_lmap[SLJIT_LOCALS_REG] << 3) | 0x4; |
| *buf++ = 0x24; |
| *buf = 4 * sizeof(sljit_w); |
| } |
| #endif |
| |
| /* Mov arguments to general registers. */ |
| return SLJIT_SUCCESS; |
| } |
| |
| SLJIT_API_FUNC_ATTRIBUTE void sljit_fake_enter(struct sljit_compiler *compiler, int args, int temporaries, int generals, int local_size) |
| { |
| int pushed_size; |
| |
| CHECK_ERROR_VOID(); |
| check_sljit_fake_enter(compiler, args, temporaries, generals, local_size); |
| |
| compiler->temporaries = temporaries; |
| compiler->generals = generals; |
| /* Including the return address saved by the call instruction. */ |
| pushed_size = (generals + 1) * sizeof(sljit_w); |
| #ifdef _WIN64 |
| compiler->has_locals = local_size > 0; |
| if (local_size > 0) |
| pushed_size += sizeof(sljit_w); |
| if (temporaries >= 5) |
| pushed_size += sizeof(sljit_w); |
| #endif |
| compiler->local_size = ((local_size + pushed_size + 16 - 1) & ~(16 - 1)) - pushed_size; |
| #ifdef _WIN64 |
| compiler->local_size += 4 * sizeof(sljit_w); |
| #endif |
| } |
| |
| SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_return(struct sljit_compiler *compiler, int src, sljit_w srcw) |
| { |
| int size; |
| sljit_ub *buf; |
| |
| CHECK_ERROR(); |
| check_sljit_emit_return(compiler, src, srcw); |
| |
| compiler->flags_saved = 0; |
| |
| if (src != SLJIT_UNUSED && src != SLJIT_RETURN_REG) { |
| compiler->mode32 = 0; |
| FAIL_IF(emit_mov(compiler, SLJIT_RETURN_REG, 0, src, srcw)); |
| } |
| |
| if (compiler->local_size > 0) { |
| if (compiler->local_size <= 127) { |
| buf = (sljit_ub*)ensure_buf(compiler, 1 + 4); |
| FAIL_IF(!buf); |
| INC_SIZE(4); |
| *buf++ = REX_W; |
| *buf++ = 0x83; |
| *buf++ = 0xc0 | (0 << 3) | 4; |
| *buf = compiler->local_size; |
| } |
| else { |
| buf = (sljit_ub*)ensure_buf(compiler, 1 + 7); |
| FAIL_IF(!buf); |
| INC_SIZE(7); |
| *buf++ = REX_W; |
| *buf++ = 0x81; |
| *buf++ = 0xc0 | (0 << 3) | 4; |
| *(sljit_hw*)buf = compiler->local_size; |
| } |
| } |
| |
| size = 1 + compiler->generals; |
| #ifndef _WIN64 |
| if (compiler->generals >= 2) |
| size += compiler->generals - 1; |
| #else |
| if (compiler->has_locals) |
| size += 2; |
| if (compiler->generals >= 4) |
| size += compiler->generals - 3; |
| if (compiler->temporaries >= 5) |
| size += (5 - 4) * 2; |
| #endif |
| buf = (sljit_ub*)ensure_buf(compiler, 1 + size); |
| FAIL_IF(!buf); |
| |
| INC_SIZE(size); |
| |
| #ifdef _WIN64 |
| if (compiler->has_locals) { |
| *buf++ = REX_B; |
| POP_REG(reg_lmap[SLJIT_LOCALS_REG]); |
| } |
| if (compiler->temporaries >= 5) { |
| *buf++ = REX_B; |
| POP_REG(reg_lmap[SLJIT_TEMPORARY_EREG2]); |
| } |
| #endif |
| if (compiler->generals >= 1) |
| POP_REG(reg_map[SLJIT_GENERAL_REG1]); |
| if (compiler->generals >= 2) { |
| #ifndef _WIN64 |
| *buf++ = REX_B; |
| #endif |
| POP_REG(reg_lmap[SLJIT_GENERAL_REG2]); |
| } |
| if (compiler->generals >= 3) { |
| #ifndef _WIN64 |
| *buf++ = REX_B; |
| #endif |
| POP_REG(reg_lmap[SLJIT_GENERAL_REG3]); |
| } |
| if (compiler->generals >= 4) { |
| *buf++ = REX_B; |
| POP_REG(reg_lmap[SLJIT_GENERAL_EREG1]); |
| } |
| if (compiler->generals >= 5) { |
| *buf++ = REX_B; |
| POP_REG(reg_lmap[SLJIT_GENERAL_EREG2]); |
| } |
| |
| RET(); |
| return SLJIT_SUCCESS; |
| } |
| |
| /* --------------------------------------------------------------------- */ |
| /* Operators */ |
| /* --------------------------------------------------------------------- */ |
| |
| static int emit_do_imm32(struct sljit_compiler *compiler, sljit_ub rex, sljit_ub opcode, sljit_w imm) |
| { |
| sljit_ub *buf; |
| |
| if (rex != 0) { |
| buf = (sljit_ub*)ensure_buf(compiler, 1 + 2 + sizeof(sljit_hw)); |
| FAIL_IF(!buf); |
| INC_SIZE(2 + sizeof(sljit_hw)); |
| *buf++ = rex; |
| *buf++ = opcode; |
| *(sljit_hw*)buf = imm; |
| } |
| else { |
| buf = (sljit_ub*)ensure_buf(compiler, 1 + 1 + sizeof(sljit_hw)); |
| FAIL_IF(!buf); |
| INC_SIZE(1 + sizeof(sljit_hw)); |
| *buf++ = opcode; |
| *(sljit_hw*)buf = imm; |
| } |
| return SLJIT_SUCCESS; |
| } |
| |
| static sljit_ub* emit_x86_instruction(struct sljit_compiler *compiler, int size, |
| /* The register or immediate operand. */ |
| int a, sljit_w imma, |
| /* The general operand (not immediate). */ |
| int b, sljit_w immb) |
| { |
| sljit_ub *buf; |
| sljit_ub *buf_ptr; |
| sljit_ub rex = 0; |
| int flags = size & ~0xf; |
| int 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)); |
| #endif |
| |
| size &= 0xf; |
| inst_size = size; |
| |
| if ((b & SLJIT_MEM) && !(b & 0xf0) && NOT_HALFWORD(immb)) { |
| if (emit_load_imm64(compiler, TMP_REG3, immb)) |
| return NULL; |
| immb = 0; |
| if (b & 0xf) |
| b |= TMP_REG3 << 4; |
| 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) |
| 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 & 0x0f) == SLJIT_UNUSED) |
| inst_size += 1 + sizeof(sljit_hw); /* SIB byte required to avoid RIP based addressing. */ |
| else { |
| if (reg_map[b & 0x0f] >= 8) |
| rex |= REX_B; |
| if (immb != 0 && !(b & 0xf0)) { |
| /* Immediate operand. */ |
| if (immb <= 127 && immb >= -128) |
| inst_size += sizeof(sljit_b); |
| else |
| inst_size += sizeof(sljit_hw); |
| } |
| } |
| |
| #ifndef _WIN64 |
| if ((b & 0xf) == SLJIT_LOCALS_REG && (b & 0xf0) == 0) |
| b |= SLJIT_LOCALS_REG << 4; |
| #endif |
| |
| if ((b & 0xf0) != SLJIT_UNUSED) { |
| inst_size += 1; /* SIB byte. */ |
| if (reg_map[(b >> 4) & 0x0f] >= 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 &= 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_hw); |
| } |
| 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++; |
| |
| buf = (sljit_ub*)ensure_buf(compiler, 1 + inst_size); |
| PTR_FAIL_IF(!buf); |
| |
| /* Encoding the byte. */ |
| INC_SIZE(inst_size); |
| #if (defined SLJIT_SSE2 && SLJIT_SSE2) |
| if (flags & EX86_PREF_F2) |
| *buf++ = 0xf2; |
| #endif |
| if (flags & EX86_PREF_66) |
| *buf++ = 0x66; |
| if (rex) |
| *buf++ = rex; |
| buf_ptr = buf + size; |
| |
| /* Encode mod/rm byte. */ |
| if (!(flags & EX86_SHIFT_INS)) { |
| if ((flags & EX86_BIN_INS) && (a & SLJIT_IMM)) |
| *buf = (flags & EX86_BYTE_ARG) ? 0x83 : 0x81; |
| |
| 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) |
| *buf = 0xd1; |
| else |
| *buf = 0xc1; |
| } else |
| *buf = 0xd3; |
| *buf_ptr = 0; |
| } |
| |
| if (!(b & SLJIT_MEM)) |
| #if (defined SLJIT_SSE2 && SLJIT_SSE2) |
| *buf_ptr++ |= 0xc0 + ((!(flags & EX86_SSE2)) ? reg_lmap[b] : b); |
| #else |
| *buf_ptr++ |= 0xc0 + reg_lmap[b]; |
| #endif |
| else if ((b & 0x0f) != SLJIT_UNUSED) { |
| #ifdef _WIN64 |
| SLJIT_ASSERT((b & 0xf0) != (SLJIT_LOCALS_REG << 4)); |
| #endif |
| if ((b & 0xf0) == SLJIT_UNUSED || (b & 0xf0) == (SLJIT_LOCALS_REG << 4)) { |
| if (immb != 0) { |
| if (immb <= 127 && immb >= -128) |
| *buf_ptr |= 0x40; |
| else |
| *buf_ptr |= 0x80; |
| } |
| |
| if ((b & 0xf0) == SLJIT_UNUSED) |
| *buf_ptr++ |= reg_lmap[b & 0x0f]; |
| else { |
| *buf_ptr++ |= 0x04; |
| *buf_ptr++ = reg_lmap[b & 0x0f] | (reg_lmap[(b >> 4) & 0x0f] << 3); |
| } |
| |
| if (immb != 0) { |
| if (immb <= 127 && immb >= -128) |
| *buf_ptr++ = immb; /* 8 bit displacement. */ |
| else { |
| *(sljit_hw*)buf_ptr = immb; /* 32 bit displacement. */ |
| buf_ptr += sizeof(sljit_hw); |
| } |
| } |
| } |
| else { |
| *buf_ptr++ |= 0x04; |
| *buf_ptr++ = reg_lmap[b & 0x0f] | (reg_lmap[(b >> 4) & 0x0f] << 3) | (immb << 6); |
| } |
| } |
| else { |
| *buf_ptr++ |= 0x04; |
| *buf_ptr++ = 0x25; |
| *(sljit_hw*)buf_ptr = immb; /* 32 bit displacement. */ |
| buf_ptr += sizeof(sljit_hw); |
| } |
| |
| 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_hw*)buf_ptr = imma; |
| } |
| |
| return !(flags & EX86_SHIFT_INS) ? buf : (buf + 1); |
| } |
| |
| /* --------------------------------------------------------------------- */ |
| /* Call / return instructions */ |
| /* --------------------------------------------------------------------- */ |
| |
| static SLJIT_INLINE int call_with_args(struct sljit_compiler *compiler, int type) |
| { |
| sljit_ub *buf; |
| |
| #ifndef _WIN64 |
| SLJIT_COMPILE_ASSERT(reg_map[SLJIT_TEMPORARY_REG2] == 6 && reg_map[SLJIT_TEMPORARY_REG1] < 8 && reg_map[SLJIT_TEMPORARY_REG3] < 8, args_registers); |
| |
| buf = (sljit_ub*)ensure_buf(compiler, 1 + ((type < SLJIT_CALL3) ? 3 : 6)); |
| FAIL_IF(!buf); |
| INC_SIZE((type < SLJIT_CALL3) ? 3 : 6); |
| if (type >= SLJIT_CALL3) { |
| *buf++ = REX_W; |
| *buf++ = 0x8b; |
| *buf++ = 0xc0 | (0x2 << 3) | reg_lmap[SLJIT_TEMPORARY_REG3]; |
| } |
| *buf++ = REX_W; |
| *buf++ = 0x8b; |
| *buf++ = 0xc0 | (0x7 << 3) | reg_lmap[SLJIT_TEMPORARY_REG1]; |
| #else |
| SLJIT_COMPILE_ASSERT(reg_map[SLJIT_TEMPORARY_REG2] == 2 && reg_map[SLJIT_TEMPORARY_REG1] < 8 && reg_map[SLJIT_TEMPORARY_REG3] < 8, args_registers); |
| |
| buf = (sljit_ub*)ensure_buf(compiler, 1 + ((type < SLJIT_CALL3) ? 3 : 6)); |
| FAIL_IF(!buf); |
| INC_SIZE((type < SLJIT_CALL3) ? 3 : 6); |
| if (type >= SLJIT_CALL3) { |
| *buf++ = REX_W | REX_R; |
| *buf++ = 0x8b; |
| *buf++ = 0xc0 | (0x0 << 3) | reg_lmap[SLJIT_TEMPORARY_REG3]; |
| } |
| *buf++ = REX_W; |
| *buf++ = 0x8b; |
| *buf++ = 0xc0 | (0x1 << 3) | reg_lmap[SLJIT_TEMPORARY_REG1]; |
| #endif |
| return SLJIT_SUCCESS; |
| } |
| |
| SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_fast_enter(struct sljit_compiler *compiler, int dst, sljit_w dstw, int args, int temporaries, int generals, int local_size) |
| { |
| sljit_ub *buf; |
| |
| CHECK_ERROR(); |
| check_sljit_emit_fast_enter(compiler, dst, dstw, args, temporaries, generals, local_size); |
| |
| compiler->temporaries = temporaries; |
| compiler->generals = generals; |
| compiler->local_size = (local_size + sizeof(sljit_uw) - 1) & ~(sizeof(sljit_uw) - 1); |
| #ifdef _WIN64 |
| compiler->local_size += 4 * sizeof(sljit_w); |
| #endif |
| |
| /* For UNUSED dst. Uncommon, but possible. */ |
| if (dst == SLJIT_UNUSED) |
| dst = TMP_REGISTER; |
| |
| if (dst >= SLJIT_TEMPORARY_REG1 && dst <= TMP_REGISTER) { |
| if (reg_map[dst] < 8) { |
| buf = (sljit_ub*)ensure_buf(compiler, 1 + 1); |
| FAIL_IF(!buf); |
| |
| INC_SIZE(1); |
| POP_REG(reg_lmap[dst]); |
| } |
| else { |
| buf = (sljit_ub*)ensure_buf(compiler, 1 + 2); |
| FAIL_IF(!buf); |
| |
| INC_SIZE(2); |
| *buf++ = REX_B; |
| POP_REG(reg_lmap[dst]); |
| } |
| } |
| else if (dst & SLJIT_MEM) { |
| #if (defined SLJIT_CONFIG_X86_64 && SLJIT_CONFIG_X86_64) |
| /* REX_W is not necessary (src is not immediate). */ |
| compiler->mode32 = 1; |
| #endif |
| buf = emit_x86_instruction(compiler, 1, 0, 0, dst, dstw); |
| FAIL_IF(!buf); |
| *buf++ = 0x8f; |
| } |
| return SLJIT_SUCCESS; |
| } |
| |
| SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_fast_return(struct sljit_compiler *compiler, int src, sljit_w srcw) |
| { |
| sljit_ub *buf; |
| |
| CHECK_ERROR(); |
| check_sljit_emit_fast_return(compiler, src, srcw); |
| |
| CHECK_EXTRA_REGS(src, srcw, (void)0); |
| |
| if ((src & SLJIT_IMM) && NOT_HALFWORD(srcw)) { |
| FAIL_IF(emit_load_imm64(compiler, TMP_REGISTER, srcw)); |
| src = TMP_REGISTER; |
| } |
| |
| if (src >= SLJIT_TEMPORARY_REG1 && src <= TMP_REGISTER) { |
| if (reg_map[src] < 8) { |
| buf = (sljit_ub*)ensure_buf(compiler, 1 + 1 + 1); |
| FAIL_IF(!buf); |
| |
| INC_SIZE(1 + 1); |
| PUSH_REG(reg_lmap[src]); |
| } |
| else { |
| buf = (sljit_ub*)ensure_buf(compiler, 1 + 2 + 1); |
| FAIL_IF(!buf); |
| |
| INC_SIZE(2 + 1); |
| *buf++ = REX_B; |
| PUSH_REG(reg_lmap[src]); |
| } |
| } |
| else if (src & SLJIT_MEM) { |
| #if (defined SLJIT_CONFIG_X86_64 && SLJIT_CONFIG_X86_64) |
| /* REX_W is not necessary (src is not immediate). */ |
| compiler->mode32 = 1; |
| #endif |
| buf = emit_x86_instruction(compiler, 1, 0, 0, src, srcw); |
| FAIL_IF(!buf); |
| *buf++ = 0xff; |
| *buf |= 6 << 3; |
| |
| buf = (sljit_ub*)ensure_buf(compiler, 1 + 1); |
| FAIL_IF(!buf); |
| INC_SIZE(1); |
| } |
| else { |
| SLJIT_ASSERT(IS_HALFWORD(srcw)); |
| /* SLJIT_IMM. */ |
| buf = (sljit_ub*)ensure_buf(compiler, 1 + 5 + 1); |
| FAIL_IF(!buf); |
| |
| INC_SIZE(5 + 1); |
| *buf++ = 0x68; |
| *(sljit_hw*)buf = srcw; |
| buf += sizeof(sljit_hw); |
| } |
| |
| RET(); |
| return SLJIT_SUCCESS; |
| } |
| |
| |
| /* --------------------------------------------------------------------- */ |
| /* Extend input */ |
| /* --------------------------------------------------------------------- */ |
| |
| static int emit_mov_int(struct sljit_compiler *compiler, int sign, |
| int dst, sljit_w dstw, |
| int src, sljit_w srcw) |
| { |
| sljit_ub* code; |
| int dst_r; |
| |
| compiler->mode32 = 0; |
| |
| if (dst == SLJIT_UNUSED && !(src & SLJIT_MEM)) |
| return SLJIT_SUCCESS; /* Empty instruction. */ |
| |
| if (src & SLJIT_IMM) { |
| if (dst >= SLJIT_TEMPORARY_REG1 && dst <= SLJIT_NO_REGISTERS) |
| return emit_load_imm64(compiler, dst, srcw); |
| compiler->mode32 = 1; |
| code = emit_x86_instruction(compiler, 1, SLJIT_IMM, (sljit_w)(int)srcw, dst, dstw); |
| FAIL_IF(!code); |
| *code = 0xc7; |
| compiler->mode32 = 0; |
| return SLJIT_SUCCESS; |
| } |
| |
| dst_r = (dst >= SLJIT_TEMPORARY_REG1 && dst <= SLJIT_GENERAL_REG3) ? dst : TMP_REGISTER; |
| |
| if ((dst & SLJIT_MEM) && (src >= SLJIT_TEMPORARY_REG1 && src <= SLJIT_GENERAL_REG3)) |
| dst_r = src; |
| else { |
| if (sign) { |
| code = emit_x86_instruction(compiler, 1, dst_r, 0, src, srcw); |
| FAIL_IF(!code); |
| *code++ = 0x63; |
| } |
| else { |
| if (dst_r == src) { |
| compiler->mode32 = 1; |
| code = emit_x86_instruction(compiler, 1, TMP_REGISTER, 0, src, 0); |
| FAIL_IF(!code); |
| *code++ = 0x8b; |
| compiler->mode32 = 0; |
| } |
| /* xor reg, reg. */ |
| code = emit_x86_instruction(compiler, 1, dst_r, 0, dst_r, 0); |
| FAIL_IF(!code); |
| *code++ = 0x33; |
| if (dst_r != src) { |
| compiler->mode32 = 1; |
| code = emit_x86_instruction(compiler, 1, dst_r, 0, src, srcw); |
| FAIL_IF(!code); |
| *code++ = 0x8b; |
| compiler->mode32 = 0; |
| } |
| else { |
| compiler->mode32 = 1; |
| code = emit_x86_instruction(compiler, 1, src, 0, TMP_REGISTER, 0); |
| FAIL_IF(!code); |
| *code++ = 0x8b; |
| compiler->mode32 = 0; |
| } |
| } |
| } |
| |
| if (dst & SLJIT_MEM) { |
| compiler->mode32 = 1; |
| code = emit_x86_instruction(compiler, 1, dst_r, 0, dst, dstw); |
| FAIL_IF(!code); |
| *code = 0x89; |
| compiler->mode32 = 0; |
| } |
| |
| return SLJIT_SUCCESS; |
| } |