| /* |
| * Stack-less Just-In-Time compiler |
| * |
| * Copyright 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 32-bit arch dependent functions. */ |
| |
| /* --------------------------------------------------------------------- */ |
| /* Operators */ |
| /* --------------------------------------------------------------------- */ |
| |
| static sljit_s32 emit_do_imm(struct sljit_compiler *compiler, sljit_u8 opcode, sljit_sw imm) |
| { |
| sljit_u8 *inst; |
| |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + 1 + sizeof(sljit_sw)); |
| FAIL_IF(!inst); |
| INC_SIZE(1 + sizeof(sljit_sw)); |
| *inst++ = opcode; |
| sljit_unaligned_store_sw(inst, imm); |
| return SLJIT_SUCCESS; |
| } |
| |
| /* Size contains the flags as well. */ |
| static sljit_u8* emit_x86_instruction(struct sljit_compiler *compiler, sljit_uw size, |
| /* The register or immediate operand. */ |
| sljit_s32 a, sljit_sw imma, |
| /* The general operand (not immediate). */ |
| sljit_s32 b, sljit_sw immb) |
| { |
| sljit_u8 *inst; |
| sljit_u8 *buf_ptr; |
| sljit_u8 reg_map_b; |
| sljit_uw flags = size; |
| sljit_uw inst_size; |
| |
| /* 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 (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 & REG_MASK)) |
| inst_size += sizeof(sljit_sw); |
| else if (immb != 0 && !(b & OFFS_REG_MASK)) { |
| /* Immediate operand. */ |
| if (immb <= 127 && immb >= -128) |
| inst_size += sizeof(sljit_s8); |
| else |
| inst_size += sizeof(sljit_sw); |
| } |
| else if (reg_map[b & REG_MASK] == 5) |
| inst_size += sizeof(sljit_s8); |
| |
| if ((b & REG_MASK) == SLJIT_SP && !(b & OFFS_REG_MASK)) |
| b |= TO_OFFS_REG(SLJIT_SP); |
| |
| if (b & OFFS_REG_MASK) |
| inst_size += 1; /* SIB byte. */ |
| } |
| |
| /* Calculate size of a. */ |
| 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 &= 0x1f; |
| 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_sw); |
| } |
| else |
| SLJIT_ASSERT(!(flags & EX86_SHIFT_INS) || a == SLJIT_PREF_SHIFT_REG); |
| |
| inst = (sljit_u8*)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; |
| |
| 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) |
| *buf_ptr = 0; |
| else if (!(flags & EX86_SSE2_OP1)) |
| *buf_ptr = U8(reg_map[a] << 3); |
| else |
| *buf_ptr = U8(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 = U8(*buf_ptr | MOD_REG | (!(flags & EX86_SSE2_OP2) ? reg_map[b] : b)); |
| buf_ptr++; |
| } else if (b & REG_MASK) { |
| reg_map_b = reg_map[b & REG_MASK]; |
| |
| if (!(b & OFFS_REG_MASK) || (b & OFFS_REG_MASK) == TO_OFFS_REG(SLJIT_SP) || reg_map_b == 5) { |
| if (immb != 0 || reg_map_b == 5) { |
| if (immb <= 127 && immb >= -128) |
| *buf_ptr |= 0x40; |
| else |
| *buf_ptr |= 0x80; |
| } |
| |
| if (!(b & OFFS_REG_MASK)) |
| *buf_ptr++ |= reg_map_b; |
| else { |
| *buf_ptr++ |= 0x04; |
| *buf_ptr++ = U8(reg_map_b | (reg_map[OFFS_REG(b)] << 3)); |
| } |
| |
| if (immb != 0 || reg_map_b == 5) { |
| if (immb <= 127 && immb >= -128) |
| *buf_ptr++ = U8(immb); /* 8 bit displacement. */ |
| else { |
| sljit_unaligned_store_sw(buf_ptr, immb); /* 32 bit displacement. */ |
| buf_ptr += sizeof(sljit_sw); |
| } |
| } |
| } |
| else { |
| *buf_ptr++ |= 0x04; |
| *buf_ptr++ = U8(reg_map_b | (reg_map[OFFS_REG(b)] << 3) | (immb << 6)); |
| } |
| } |
| else { |
| *buf_ptr++ |= 0x05; |
| sljit_unaligned_store_sw(buf_ptr, immb); /* 32 bit displacement. */ |
| buf_ptr += sizeof(sljit_sw); |
| } |
| |
| if (a & SLJIT_IMM) { |
| if (flags & EX86_BYTE_ARG) |
| *buf_ptr = U8(imma); |
| else if (flags & EX86_HALF_ARG) |
| sljit_unaligned_store_s16(buf_ptr, (sljit_s16)imma); |
| else if (!(flags & EX86_SHIFT_INS)) |
| sljit_unaligned_store_sw(buf_ptr, imma); |
| } |
| |
| return !(flags & EX86_SHIFT_INS) ? inst : (inst + 1); |
| } |
| |
| /* --------------------------------------------------------------------- */ |
| /* Enter / return */ |
| /* --------------------------------------------------------------------- */ |
| |
| static sljit_u8* generate_far_jump_code(struct sljit_jump *jump, sljit_u8 *code_ptr, sljit_sw executable_offset) |
| { |
| sljit_uw type = jump->flags >> TYPE_SHIFT; |
| |
| if (type == SLJIT_JUMP) { |
| *code_ptr++ = JMP_i32; |
| jump->addr++; |
| } |
| else if (type >= SLJIT_FAST_CALL) { |
| *code_ptr++ = CALL_i32; |
| jump->addr++; |
| } |
| else { |
| *code_ptr++ = GROUP_0F; |
| *code_ptr++ = get_jump_code(type); |
| jump->addr += 2; |
| } |
| |
| if (jump->flags & JUMP_LABEL) |
| jump->flags |= PATCH_MW; |
| else |
| sljit_unaligned_store_sw(code_ptr, (sljit_sw)(jump->u.target - (jump->addr + 4) - (sljit_uw)executable_offset)); |
| code_ptr += 4; |
| |
| return code_ptr; |
| } |
| |
| #define ENTER_R2_USED 0x00001 |
| #define ENTER_R2_TO_S 0x00002 |
| #define ENTER_R2_TO_R0 0x00004 |
| #define ENTER_R1_TO_S 0x00008 |
| #define ENTER_TMP_TO_R4 0x00010 |
| #define ENTER_TMP_TO_S 0x00020 |
| |
| SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_enter(struct sljit_compiler *compiler, |
| sljit_s32 options, sljit_s32 arg_types, sljit_s32 scratches, sljit_s32 saveds, |
| sljit_s32 fscratches, sljit_s32 fsaveds, sljit_s32 local_size) |
| { |
| sljit_s32 word_arg_count, saved_arg_count, float_arg_count; |
| sljit_s32 size, locals_offset, args_size, types, status; |
| sljit_u8 *inst; |
| #ifdef _WIN32 |
| sljit_s32 r2_offset = -1; |
| #endif |
| |
| CHECK_ERROR(); |
| CHECK(check_sljit_emit_enter(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size)); |
| set_emit_enter(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size); |
| |
| /* Emit ENDBR32 at function entry if needed. */ |
| FAIL_IF(emit_endbranch(compiler)); |
| |
| SLJIT_COMPILE_ASSERT(SLJIT_FR0 == 1, float_register_index_start); |
| |
| arg_types >>= SLJIT_ARG_SHIFT; |
| types = arg_types; |
| word_arg_count = 0; |
| saved_arg_count = 0; |
| float_arg_count = 0; |
| args_size = SSIZE_OF(sw); |
| status = 0; |
| while (types) { |
| switch (types & SLJIT_ARG_MASK) { |
| case SLJIT_ARG_TYPE_F64: |
| float_arg_count++; |
| FAIL_IF(emit_sse2_load(compiler, 0, float_arg_count, SLJIT_MEM1(SLJIT_SP), args_size)); |
| args_size += SSIZE_OF(f64); |
| break; |
| case SLJIT_ARG_TYPE_F32: |
| float_arg_count++; |
| FAIL_IF(emit_sse2_load(compiler, 1, float_arg_count, SLJIT_MEM1(SLJIT_SP), args_size)); |
| args_size += SSIZE_OF(f32); |
| break; |
| default: |
| word_arg_count++; |
| |
| if (!(types & SLJIT_ARG_TYPE_SCRATCH_REG)) { |
| saved_arg_count++; |
| if (saved_arg_count == 4) |
| status |= ENTER_TMP_TO_S; |
| } else { |
| if (word_arg_count == 4) |
| status |= ENTER_TMP_TO_R4; |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if (word_arg_count == 3) |
| status |= ENTER_R2_USED; |
| #endif |
| } |
| |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if (word_arg_count <= 2 && !(options & SLJIT_ENTER_CDECL)) |
| break; |
| #endif |
| |
| args_size += SSIZE_OF(sw); |
| break; |
| } |
| types >>= SLJIT_ARG_SHIFT; |
| } |
| |
| args_size -= SSIZE_OF(sw); |
| compiler->args_size = args_size; |
| |
| /* [esp+0] for saving temporaries and function calls. */ |
| locals_offset = 2 * SSIZE_OF(sw); |
| |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if ((options & SLJIT_ENTER_CDECL) && scratches >= 3) |
| locals_offset = 4 * SSIZE_OF(sw); |
| #else |
| if (scratches >= 3) |
| locals_offset = 4 * SSIZE_OF(sw); |
| #endif |
| |
| compiler->scratches_offset = locals_offset; |
| |
| if (scratches > 3) |
| locals_offset += ((scratches > (3 + 6)) ? 6 : (scratches - 3)) * SSIZE_OF(sw); |
| |
| if (saveds > 3) |
| locals_offset += (saveds - 3) * SSIZE_OF(sw); |
| |
| compiler->locals_offset = locals_offset; |
| |
| size = 1 + (scratches > 9 ? (scratches - 9) : 0) + (saveds <= 3 ? saveds : 3); |
| inst = (sljit_u8*)ensure_buf(compiler, (sljit_uw)(size + 1)); |
| FAIL_IF(!inst); |
| |
| INC_SIZE((sljit_uw)size); |
| PUSH_REG(reg_map[TMP_REG1]); |
| if (saveds > 2 || scratches > 9) |
| PUSH_REG(reg_map[SLJIT_S2]); |
| if (saveds > 1 || scratches > 10) |
| PUSH_REG(reg_map[SLJIT_S1]); |
| if (saveds > 0 || scratches > 11) |
| PUSH_REG(reg_map[SLJIT_S0]); |
| |
| size *= SSIZE_OF(sw); |
| |
| if (status & (ENTER_TMP_TO_R4 | ENTER_TMP_TO_S)) |
| EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_MEM1(SLJIT_SP), args_size + size); |
| |
| size += SSIZE_OF(sw); |
| |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if (!(options & SLJIT_ENTER_CDECL)) |
| size += args_size; |
| #endif |
| |
| local_size = ((locals_offset + local_size + size + 0xf) & ~0xf) - size; |
| compiler->local_size = local_size; |
| |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if (!(options & SLJIT_ENTER_CDECL)) |
| size -= args_size; |
| #endif |
| |
| word_arg_count = 0; |
| saved_arg_count = 0; |
| args_size = size; |
| while (arg_types) { |
| switch (arg_types & SLJIT_ARG_MASK) { |
| case SLJIT_ARG_TYPE_F64: |
| args_size += SSIZE_OF(f64); |
| break; |
| case SLJIT_ARG_TYPE_F32: |
| args_size += SSIZE_OF(f32); |
| break; |
| default: |
| word_arg_count++; |
| |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if (!(options & SLJIT_ENTER_CDECL) && word_arg_count <= 2) { |
| if (word_arg_count == 1) { |
| if (status & ENTER_R2_USED) { |
| EMIT_MOV(compiler, (arg_types & SLJIT_ARG_TYPE_SCRATCH_REG) ? SLJIT_R0 : SLJIT_S0, 0, SLJIT_R2, 0); |
| } else if (!(arg_types & SLJIT_ARG_TYPE_SCRATCH_REG)) { |
| status |= ENTER_R2_TO_S; |
| saved_arg_count++; |
| } else |
| status |= ENTER_R2_TO_R0; |
| } else if (!(arg_types & SLJIT_ARG_TYPE_SCRATCH_REG)) { |
| status |= ENTER_R1_TO_S; |
| saved_arg_count++; |
| } |
| break; |
| } |
| #endif |
| if (arg_types & SLJIT_ARG_TYPE_SCRATCH_REG) { |
| SLJIT_ASSERT(word_arg_count <= 3 || (status & ENTER_TMP_TO_R4)); |
| |
| if (word_arg_count <= 3) { |
| #ifdef _WIN32 |
| if (word_arg_count == 3 && local_size > 4 * 4096) |
| r2_offset = local_size + args_size; |
| else |
| #endif |
| EMIT_MOV(compiler, word_arg_count, 0, SLJIT_MEM1(SLJIT_SP), args_size); |
| } |
| } else { |
| SLJIT_ASSERT(saved_arg_count <= 3 || (status & ENTER_TMP_TO_S)); |
| |
| if (saved_arg_count <= 3) |
| EMIT_MOV(compiler, SLJIT_S0 - saved_arg_count, 0, SLJIT_MEM1(SLJIT_SP), args_size); |
| saved_arg_count++; |
| } |
| args_size += SSIZE_OF(sw); |
| break; |
| } |
| arg_types >>= SLJIT_ARG_SHIFT; |
| } |
| |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if (!(options & SLJIT_ENTER_CDECL)) { |
| if (status & ENTER_R2_TO_R0) |
| EMIT_MOV(compiler, SLJIT_R0, 0, SLJIT_R2, 0); |
| |
| saved_arg_count = 0; |
| if (status & ENTER_R2_TO_S) { |
| EMIT_MOV(compiler, SLJIT_S0, 0, SLJIT_R2, 0); |
| saved_arg_count++; |
| } |
| |
| if (status & ENTER_R1_TO_S) |
| EMIT_MOV(compiler, SLJIT_S0 - saved_arg_count, 0, SLJIT_R1, 0); |
| } |
| #endif |
| |
| SLJIT_ASSERT(SLJIT_LOCALS_OFFSET > 0); |
| |
| #ifdef _WIN32 |
| SLJIT_ASSERT(r2_offset == -1 || local_size > 4 * 4096); |
| |
| if (local_size > 4096) { |
| if (local_size <= 4 * 4096) { |
| BINARY_IMM32(OR, 0, SLJIT_MEM1(SLJIT_SP), -4096); |
| |
| if (local_size > 2 * 4096) |
| BINARY_IMM32(OR, 0, SLJIT_MEM1(SLJIT_SP), -4096 * 2); |
| if (local_size > 3 * 4096) |
| BINARY_IMM32(OR, 0, SLJIT_MEM1(SLJIT_SP), -4096 * 3); |
| } |
| else { |
| EMIT_MOV(compiler, SLJIT_R2, 0, SLJIT_IMM, local_size >> 12); |
| |
| BINARY_IMM32(OR, 0, SLJIT_MEM1(SLJIT_SP), -4096); |
| BINARY_IMM32(SUB, 4096, SLJIT_SP, 0); |
| |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + 2); |
| FAIL_IF(!inst); |
| |
| INC_SIZE(2); |
| inst[0] = LOOP_i8; |
| inst[1] = (sljit_u8)-16; |
| local_size &= 0xfff; |
| } |
| } |
| |
| if (local_size > 0) { |
| BINARY_IMM32(OR, 0, SLJIT_MEM1(SLJIT_SP), -local_size); |
| BINARY_IMM32(SUB, local_size, SLJIT_SP, 0); |
| } |
| |
| if (r2_offset != -1) |
| EMIT_MOV(compiler, SLJIT_R2, 0, SLJIT_MEM1(SLJIT_SP), r2_offset); |
| |
| #else /* !_WIN32 */ |
| |
| SLJIT_ASSERT(local_size > 0); |
| |
| BINARY_IMM32(SUB, local_size, SLJIT_SP, 0); |
| |
| #endif /* _WIN32 */ |
| |
| if (status & (ENTER_TMP_TO_R4 | ENTER_TMP_TO_S)) { |
| size = (status & ENTER_TMP_TO_R4) ? compiler->scratches_offset : compiler->locals_offset - SSIZE_OF(sw); |
| EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), size, TMP_REG1, 0); |
| } |
| |
| return SLJIT_SUCCESS; |
| } |
| |
| SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_set_context(struct sljit_compiler *compiler, |
| sljit_s32 options, sljit_s32 arg_types, sljit_s32 scratches, sljit_s32 saveds, |
| sljit_s32 fscratches, sljit_s32 fsaveds, sljit_s32 local_size) |
| { |
| sljit_s32 args_size, locals_offset; |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| sljit_s32 word_arg_count = 0; |
| #endif |
| |
| CHECK_ERROR(); |
| CHECK(check_sljit_set_context(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size)); |
| set_set_context(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size); |
| |
| arg_types >>= SLJIT_ARG_SHIFT; |
| args_size = 0; |
| while (arg_types) { |
| switch (arg_types & SLJIT_ARG_MASK) { |
| case SLJIT_ARG_TYPE_F64: |
| args_size += SSIZE_OF(f64); |
| break; |
| case SLJIT_ARG_TYPE_F32: |
| args_size += SSIZE_OF(f32); |
| break; |
| default: |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if (word_arg_count >= 2) |
| args_size += SSIZE_OF(sw); |
| word_arg_count++; |
| #else |
| args_size += SSIZE_OF(sw); |
| #endif |
| break; |
| } |
| arg_types >>= SLJIT_ARG_SHIFT; |
| } |
| |
| compiler->args_size = args_size; |
| |
| /* [esp+0] for saving temporaries and function calls. */ |
| locals_offset = 2 * SSIZE_OF(sw); |
| |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if ((options & SLJIT_ENTER_CDECL) && scratches >= 3) |
| locals_offset = 4 * SSIZE_OF(sw); |
| #else |
| if (scratches >= 3) |
| locals_offset = 4 * SSIZE_OF(sw); |
| #endif |
| |
| compiler->scratches_offset = locals_offset; |
| |
| if (scratches > 3) |
| locals_offset += ((scratches > (3 + 6)) ? 6 : (scratches - 3)) * SSIZE_OF(sw); |
| |
| if (saveds > 3) |
| locals_offset += (saveds - 3) * SSIZE_OF(sw); |
| |
| compiler->locals_offset = locals_offset; |
| |
| saveds = (2 + (scratches > 9 ? (scratches - 9) : 0) + (saveds <= 3 ? saveds : 3)) * SSIZE_OF(sw); |
| |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if (!(options & SLJIT_ENTER_CDECL)) |
| saveds += args_size; |
| #endif |
| |
| compiler->local_size = ((locals_offset + local_size + saveds + 0xf) & ~0xf) - saveds; |
| return SLJIT_SUCCESS; |
| } |
| |
| static sljit_s32 emit_stack_frame_release(struct sljit_compiler *compiler) |
| { |
| sljit_uw size; |
| sljit_u8 *inst; |
| |
| size = (sljit_uw)(1 + (compiler->scratches > 9 ? (compiler->scratches - 9) : 0) + |
| (compiler->saveds <= 3 ? compiler->saveds : 3)); |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + size); |
| FAIL_IF(!inst); |
| |
| INC_SIZE(size); |
| |
| if (compiler->saveds > 0 || compiler->scratches > 11) |
| POP_REG(reg_map[SLJIT_S0]); |
| if (compiler->saveds > 1 || compiler->scratches > 10) |
| POP_REG(reg_map[SLJIT_S1]); |
| if (compiler->saveds > 2 || compiler->scratches > 9) |
| POP_REG(reg_map[SLJIT_S2]); |
| POP_REG(reg_map[TMP_REG1]); |
| |
| return SLJIT_SUCCESS; |
| } |
| |
| SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_return_void(struct sljit_compiler *compiler) |
| { |
| sljit_uw size; |
| sljit_u8 *inst; |
| |
| CHECK_ERROR(); |
| CHECK(check_sljit_emit_return_void(compiler)); |
| |
| SLJIT_ASSERT(compiler->args_size >= 0); |
| SLJIT_ASSERT(compiler->local_size > 0); |
| |
| BINARY_IMM32(ADD, compiler->local_size, SLJIT_SP, 0); |
| |
| FAIL_IF(emit_stack_frame_release(compiler)); |
| |
| size = 1; |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if (compiler->args_size > 0 && !(compiler->options & SLJIT_ENTER_CDECL)) |
| size = 3; |
| #endif |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + size); |
| FAIL_IF(!inst); |
| |
| INC_SIZE(size); |
| |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if (compiler->args_size > 0 && !(compiler->options & SLJIT_ENTER_CDECL)) { |
| RET_I16(U8(compiler->args_size)); |
| return SLJIT_SUCCESS; |
| } |
| #endif |
| |
| RET(); |
| return SLJIT_SUCCESS; |
| } |
| |
| /* --------------------------------------------------------------------- */ |
| /* Call / return instructions */ |
| /* --------------------------------------------------------------------- */ |
| |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| |
| static sljit_sw c_fast_call_get_stack_size(sljit_s32 arg_types, sljit_s32 *word_arg_count_ptr) |
| { |
| sljit_sw stack_size = 0; |
| sljit_s32 word_arg_count = 0; |
| |
| arg_types >>= SLJIT_ARG_SHIFT; |
| |
| while (arg_types) { |
| switch (arg_types & SLJIT_ARG_MASK) { |
| case SLJIT_ARG_TYPE_F64: |
| stack_size += SSIZE_OF(f64); |
| break; |
| case SLJIT_ARG_TYPE_F32: |
| stack_size += SSIZE_OF(f32); |
| break; |
| default: |
| word_arg_count++; |
| if (word_arg_count > 2) |
| stack_size += SSIZE_OF(sw); |
| break; |
| } |
| |
| arg_types >>= SLJIT_ARG_SHIFT; |
| } |
| |
| if (word_arg_count_ptr) |
| *word_arg_count_ptr = word_arg_count; |
| |
| return stack_size; |
| } |
| |
| static sljit_s32 c_fast_call_with_args(struct sljit_compiler *compiler, |
| sljit_s32 arg_types, sljit_sw stack_size, sljit_s32 word_arg_count, sljit_s32 swap_args) |
| { |
| sljit_u8 *inst; |
| sljit_s32 float_arg_count; |
| |
| if (stack_size == SSIZE_OF(sw) && word_arg_count == 3) { |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + 1); |
| FAIL_IF(!inst); |
| INC_SIZE(1); |
| PUSH_REG(reg_map[SLJIT_R2]); |
| } |
| else if (stack_size > 0) { |
| if (word_arg_count >= 4) |
| EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_MEM1(SLJIT_SP), compiler->scratches_offset); |
| |
| BINARY_IMM32(SUB, stack_size, SLJIT_SP, 0); |
| |
| stack_size = 0; |
| arg_types >>= SLJIT_ARG_SHIFT; |
| word_arg_count = 0; |
| float_arg_count = 0; |
| while (arg_types) { |
| switch (arg_types & SLJIT_ARG_MASK) { |
| case SLJIT_ARG_TYPE_F64: |
| float_arg_count++; |
| FAIL_IF(emit_sse2_store(compiler, 0, SLJIT_MEM1(SLJIT_SP), stack_size, float_arg_count)); |
| stack_size += SSIZE_OF(f64); |
| break; |
| case SLJIT_ARG_TYPE_F32: |
| float_arg_count++; |
| FAIL_IF(emit_sse2_store(compiler, 1, SLJIT_MEM1(SLJIT_SP), stack_size, float_arg_count)); |
| stack_size += SSIZE_OF(f32); |
| break; |
| default: |
| word_arg_count++; |
| if (word_arg_count == 3) { |
| EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), stack_size, SLJIT_R2, 0); |
| stack_size += SSIZE_OF(sw); |
| } |
| else if (word_arg_count == 4) { |
| EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), stack_size, TMP_REG1, 0); |
| stack_size += SSIZE_OF(sw); |
| } |
| break; |
| } |
| |
| arg_types >>= SLJIT_ARG_SHIFT; |
| } |
| } |
| |
| if (word_arg_count > 0) { |
| if (swap_args) { |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + 1); |
| FAIL_IF(!inst); |
| INC_SIZE(1); |
| |
| *inst++ = U8(XCHG_EAX_r | reg_map[SLJIT_R2]); |
| } |
| else { |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + 2); |
| FAIL_IF(!inst); |
| INC_SIZE(2); |
| |
| *inst++ = MOV_r_rm; |
| *inst++ = U8(MOD_REG | (reg_map[SLJIT_R2] << 3) | reg_map[SLJIT_R0]); |
| } |
| } |
| |
| return SLJIT_SUCCESS; |
| } |
| |
| #endif |
| |
| static sljit_s32 cdecl_call_get_stack_size(struct sljit_compiler *compiler, sljit_s32 arg_types, sljit_s32 *word_arg_count_ptr) |
| { |
| sljit_sw stack_size = 0; |
| sljit_s32 word_arg_count = 0; |
| |
| arg_types >>= SLJIT_ARG_SHIFT; |
| |
| while (arg_types) { |
| switch (arg_types & SLJIT_ARG_MASK) { |
| case SLJIT_ARG_TYPE_F64: |
| stack_size += SSIZE_OF(f64); |
| break; |
| case SLJIT_ARG_TYPE_F32: |
| stack_size += SSIZE_OF(f32); |
| break; |
| default: |
| word_arg_count++; |
| stack_size += SSIZE_OF(sw); |
| break; |
| } |
| |
| arg_types >>= SLJIT_ARG_SHIFT; |
| } |
| |
| if (word_arg_count_ptr) |
| *word_arg_count_ptr = word_arg_count; |
| |
| if (stack_size <= compiler->scratches_offset) |
| return 0; |
| |
| return ((stack_size - compiler->scratches_offset + 0xf) & ~0xf); |
| } |
| |
| static sljit_s32 cdecl_call_with_args(struct sljit_compiler *compiler, |
| sljit_s32 arg_types, sljit_sw stack_size, sljit_s32 word_arg_count) |
| { |
| sljit_s32 float_arg_count = 0; |
| sljit_u8 *inst; |
| |
| if (word_arg_count >= 4) |
| EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_MEM1(SLJIT_SP), compiler->scratches_offset); |
| |
| if (stack_size > 0) |
| BINARY_IMM32(SUB, stack_size, SLJIT_SP, 0); |
| |
| stack_size = 0; |
| word_arg_count = 0; |
| arg_types >>= SLJIT_ARG_SHIFT; |
| |
| while (arg_types) { |
| switch (arg_types & SLJIT_ARG_MASK) { |
| case SLJIT_ARG_TYPE_F64: |
| float_arg_count++; |
| FAIL_IF(emit_sse2_store(compiler, 0, SLJIT_MEM1(SLJIT_SP), stack_size, float_arg_count)); |
| stack_size += SSIZE_OF(f64); |
| break; |
| case SLJIT_ARG_TYPE_F32: |
| float_arg_count++; |
| FAIL_IF(emit_sse2_store(compiler, 1, SLJIT_MEM1(SLJIT_SP), stack_size, float_arg_count)); |
| stack_size += SSIZE_OF(f32); |
| break; |
| default: |
| word_arg_count++; |
| EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), stack_size, (word_arg_count >= 4) ? TMP_REG1 : word_arg_count, 0); |
| stack_size += SSIZE_OF(sw); |
| break; |
| } |
| |
| arg_types >>= SLJIT_ARG_SHIFT; |
| } |
| |
| return SLJIT_SUCCESS; |
| } |
| |
| static sljit_s32 post_call_with_args(struct sljit_compiler *compiler, |
| sljit_s32 arg_types, sljit_s32 stack_size) |
| { |
| sljit_u8 *inst; |
| sljit_s32 single; |
| |
| if (stack_size > 0) |
| BINARY_IMM32(ADD, stack_size, SLJIT_SP, 0); |
| |
| if ((arg_types & SLJIT_ARG_MASK) < SLJIT_ARG_TYPE_F64) |
| return SLJIT_SUCCESS; |
| |
| single = ((arg_types & SLJIT_ARG_MASK) == SLJIT_ARG_TYPE_F32); |
| |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + 3); |
| FAIL_IF(!inst); |
| INC_SIZE(3); |
| inst[0] = single ? FSTPS : FSTPD; |
| inst[1] = (0x03 << 3) | 0x04; |
| inst[2] = (0x04 << 3) | reg_map[SLJIT_SP]; |
| |
| return emit_sse2_load(compiler, single, SLJIT_FR0, SLJIT_MEM1(SLJIT_SP), 0); |
| } |
| |
| static sljit_s32 tail_call_with_args(struct sljit_compiler *compiler, |
| sljit_s32 *extra_space, sljit_s32 arg_types, |
| sljit_s32 src, sljit_sw srcw) |
| { |
| sljit_sw args_size, prev_args_size, saved_regs_size; |
| sljit_sw types, word_arg_count, float_arg_count; |
| sljit_sw stack_size, prev_stack_size, min_size, offset; |
| sljit_sw word_arg4_offset; |
| sljit_u8 r2_offset = 0; |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| sljit_u8 fast_call = (*extra_space & 0xff) == SLJIT_CALL; |
| #endif |
| sljit_u8* inst; |
| |
| ADJUST_LOCAL_OFFSET(src, srcw); |
| CHECK_EXTRA_REGS(src, srcw, (void)0); |
| |
| saved_regs_size = (1 + (compiler->scratches > 9 ? (compiler->scratches - 9) : 0) |
| + (compiler->saveds <= 3 ? compiler->saveds : 3)) * SSIZE_OF(sw); |
| |
| word_arg_count = 0; |
| float_arg_count = 0; |
| arg_types >>= SLJIT_ARG_SHIFT; |
| types = 0; |
| args_size = 0; |
| |
| while (arg_types != 0) { |
| types = (types << SLJIT_ARG_SHIFT) | (arg_types & SLJIT_ARG_MASK); |
| |
| switch (arg_types & SLJIT_ARG_MASK) { |
| case SLJIT_ARG_TYPE_F64: |
| args_size += SSIZE_OF(f64); |
| float_arg_count++; |
| break; |
| case SLJIT_ARG_TYPE_F32: |
| args_size += SSIZE_OF(f32); |
| float_arg_count++; |
| break; |
| default: |
| word_arg_count++; |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if (!fast_call || word_arg_count > 2) |
| args_size += SSIZE_OF(sw); |
| #else |
| args_size += SSIZE_OF(sw); |
| #endif |
| break; |
| } |
| arg_types >>= SLJIT_ARG_SHIFT; |
| } |
| |
| if (args_size <= compiler->args_size |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| && (!(compiler->options & SLJIT_ENTER_CDECL) || args_size == 0 || !fast_call) |
| #endif /* SLJIT_X86_32_FASTCALL */ |
| && 1) { |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| *extra_space = fast_call ? 0 : args_size; |
| prev_args_size = compiler->args_size; |
| stack_size = prev_args_size + SSIZE_OF(sw) + saved_regs_size; |
| #else /* !SLJIT_X86_32_FASTCALL */ |
| *extra_space = 0; |
| stack_size = args_size + SSIZE_OF(sw) + saved_regs_size; |
| #endif /* SLJIT_X86_32_FASTCALL */ |
| |
| offset = stack_size + compiler->local_size; |
| |
| if (!(src & SLJIT_IMM) && src != SLJIT_R0) { |
| if (word_arg_count >= 1) { |
| EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), 0, SLJIT_R0, 0); |
| r2_offset = sizeof(sljit_sw); |
| } |
| EMIT_MOV(compiler, SLJIT_R0, 0, src, srcw); |
| } |
| |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if (!(compiler->options & SLJIT_ENTER_CDECL)) { |
| if (!fast_call) |
| offset -= SSIZE_OF(sw); |
| |
| if (word_arg_count >= 3) { |
| word_arg4_offset = SSIZE_OF(sw); |
| |
| if (word_arg_count + float_arg_count >= 4) { |
| word_arg4_offset = SSIZE_OF(sw) + SSIZE_OF(sw); |
| if ((types & SLJIT_ARG_MASK) == SLJIT_ARG_TYPE_F64) |
| word_arg4_offset = SSIZE_OF(sw) + SSIZE_OF(f64); |
| } |
| |
| /* In cdecl mode, at least one more word value must |
| * be present on the stack before the return address. */ |
| EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), offset - word_arg4_offset, SLJIT_R2, 0); |
| } |
| |
| if (fast_call) { |
| if (args_size < prev_args_size) { |
| EMIT_MOV(compiler, SLJIT_R2, 0, SLJIT_MEM1(SLJIT_SP), offset - prev_args_size - SSIZE_OF(sw)); |
| EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), offset - args_size - SSIZE_OF(sw), SLJIT_R2, 0); |
| } |
| } else if (prev_args_size > 0) { |
| EMIT_MOV(compiler, SLJIT_R2, 0, SLJIT_MEM1(SLJIT_SP), offset - prev_args_size); |
| EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), offset, SLJIT_R2, 0); |
| } |
| } |
| #endif /* SLJIT_X86_32_FASTCALL */ |
| |
| while (types != 0) { |
| switch (types & SLJIT_ARG_MASK) { |
| case SLJIT_ARG_TYPE_F64: |
| offset -= SSIZE_OF(f64); |
| FAIL_IF(emit_sse2_store(compiler, 0, SLJIT_MEM1(SLJIT_SP), offset, float_arg_count)); |
| float_arg_count--; |
| break; |
| case SLJIT_ARG_TYPE_F32: |
| offset -= SSIZE_OF(f32); |
| FAIL_IF(emit_sse2_store(compiler, 0, SLJIT_MEM1(SLJIT_SP), offset, float_arg_count)); |
| float_arg_count--; |
| break; |
| default: |
| switch (word_arg_count) { |
| case 1: |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if (fast_call) { |
| EMIT_MOV(compiler, SLJIT_R2, 0, r2_offset != 0 ? SLJIT_MEM1(SLJIT_SP) : SLJIT_R0, 0); |
| break; |
| } |
| #endif |
| offset -= SSIZE_OF(sw); |
| if (r2_offset != 0) { |
| EMIT_MOV(compiler, SLJIT_R2, 0, SLJIT_MEM1(SLJIT_SP), 0); |
| EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), offset, SLJIT_R2, 0); |
| } else |
| EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), offset, SLJIT_R0, 0); |
| break; |
| case 2: |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if (fast_call) |
| break; |
| #endif |
| offset -= SSIZE_OF(sw); |
| EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), offset, SLJIT_R1, 0); |
| break; |
| case 3: |
| offset -= SSIZE_OF(sw); |
| break; |
| case 4: |
| offset -= SSIZE_OF(sw); |
| EMIT_MOV(compiler, SLJIT_R2, 0, SLJIT_MEM1(SLJIT_SP), compiler->scratches_offset); |
| EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), offset, SLJIT_R2, 0); |
| break; |
| } |
| word_arg_count--; |
| break; |
| } |
| types >>= SLJIT_ARG_SHIFT; |
| } |
| |
| BINARY_IMM32(ADD, compiler->local_size, SLJIT_SP, 0); |
| FAIL_IF(emit_stack_frame_release(compiler)); |
| |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if (args_size < prev_args_size) |
| BINARY_IMM32(ADD, prev_args_size - args_size, SLJIT_SP, 0); |
| #endif |
| |
| return SLJIT_SUCCESS; |
| } |
| |
| stack_size = args_size + SSIZE_OF(sw); |
| |
| if (word_arg_count >= 1 && !(src & SLJIT_IMM) && src != SLJIT_R0) { |
| r2_offset = SSIZE_OF(sw); |
| stack_size += SSIZE_OF(sw); |
| } |
| |
| if (word_arg_count >= 3) |
| stack_size += SSIZE_OF(sw); |
| |
| prev_args_size = 0; |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if (!(compiler->options & SLJIT_ENTER_CDECL)) |
| prev_args_size = compiler->args_size; |
| #endif |
| |
| prev_stack_size = prev_args_size + SSIZE_OF(sw) + saved_regs_size; |
| min_size = prev_stack_size + compiler->local_size; |
| |
| word_arg4_offset = compiler->scratches_offset; |
| |
| if (stack_size > min_size) { |
| BINARY_IMM32(SUB, stack_size - min_size, SLJIT_SP, 0); |
| if (src == SLJIT_MEM1(SLJIT_SP)) |
| srcw += stack_size - min_size; |
| word_arg4_offset += stack_size - min_size; |
| } |
| else |
| stack_size = min_size; |
| |
| if (word_arg_count >= 3) { |
| EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), r2_offset, SLJIT_R2, 0); |
| |
| if (word_arg_count >= 4) |
| EMIT_MOV(compiler, SLJIT_R2, 0, SLJIT_MEM1(SLJIT_SP), word_arg4_offset); |
| } |
| |
| if (!(src & SLJIT_IMM) && src != SLJIT_R0) { |
| if (word_arg_count >= 1) { |
| SLJIT_ASSERT(r2_offset == sizeof(sljit_sw)); |
| EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), 0, SLJIT_R0, 0); |
| } |
| EMIT_MOV(compiler, SLJIT_R0, 0, src, srcw); |
| } |
| |
| /* Restore saved registers. */ |
| offset = stack_size - prev_args_size - 2 * SSIZE_OF(sw); |
| EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_MEM1(SLJIT_SP), offset); |
| |
| if (compiler->saveds > 2 || compiler->scratches > 9) { |
| offset -= SSIZE_OF(sw); |
| EMIT_MOV(compiler, SLJIT_S2, 0, SLJIT_MEM1(SLJIT_SP), offset); |
| } |
| if (compiler->saveds > 1 || compiler->scratches > 10) { |
| offset -= SSIZE_OF(sw); |
| EMIT_MOV(compiler, SLJIT_S1, 0, SLJIT_MEM1(SLJIT_SP), offset); |
| } |
| if (compiler->saveds > 0 || compiler->scratches > 11) { |
| offset -= SSIZE_OF(sw); |
| EMIT_MOV(compiler, SLJIT_S0, 0, SLJIT_MEM1(SLJIT_SP), offset); |
| } |
| |
| /* Copy fourth argument and return address. */ |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if (fast_call) { |
| offset = stack_size; |
| *extra_space = 0; |
| |
| if (word_arg_count >= 4 && prev_args_size == 0) { |
| offset -= SSIZE_OF(sw); |
| inst = emit_x86_instruction(compiler, 1, SLJIT_R2, 0, SLJIT_MEM1(SLJIT_SP), offset); |
| FAIL_IF(!inst); |
| *inst = XCHG_r_rm; |
| |
| SLJIT_ASSERT(args_size != prev_args_size); |
| } else { |
| if (word_arg_count >= 4) { |
| offset -= SSIZE_OF(sw); |
| EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), offset, SLJIT_R2, 0); |
| } |
| |
| if (args_size != prev_args_size) |
| EMIT_MOV(compiler, SLJIT_R2, 0, SLJIT_MEM1(SLJIT_SP), stack_size - prev_args_size - SSIZE_OF(sw)); |
| } |
| |
| if (args_size != prev_args_size) |
| EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), stack_size - args_size - SSIZE_OF(sw), SLJIT_R2, 0); |
| } else { |
| #endif /* SLJIT_X86_32_FASTCALL */ |
| offset = stack_size - SSIZE_OF(sw); |
| *extra_space = args_size; |
| |
| if (word_arg_count >= 4 && prev_args_size == SSIZE_OF(sw)) { |
| offset -= SSIZE_OF(sw); |
| inst = emit_x86_instruction(compiler, 1, SLJIT_R2, 0, SLJIT_MEM1(SLJIT_SP), offset); |
| FAIL_IF(!inst); |
| *inst = XCHG_r_rm; |
| |
| SLJIT_ASSERT(prev_args_size > 0); |
| } else { |
| if (word_arg_count >= 4) { |
| offset -= SSIZE_OF(sw); |
| EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), offset, SLJIT_R2, 0); |
| } |
| |
| if (prev_args_size > 0) |
| EMIT_MOV(compiler, SLJIT_R2, 0, SLJIT_MEM1(SLJIT_SP), stack_size - prev_args_size - SSIZE_OF(sw)); |
| } |
| |
| /* Copy return address. */ |
| if (prev_args_size > 0) |
| EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), stack_size - SSIZE_OF(sw), SLJIT_R2, 0); |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| } |
| #endif /* SLJIT_X86_32_FASTCALL */ |
| |
| while (types != 0) { |
| switch (types & SLJIT_ARG_MASK) { |
| case SLJIT_ARG_TYPE_F64: |
| offset -= SSIZE_OF(f64); |
| FAIL_IF(emit_sse2_store(compiler, 0, SLJIT_MEM1(SLJIT_SP), offset, float_arg_count)); |
| float_arg_count--; |
| break; |
| case SLJIT_ARG_TYPE_F32: |
| offset -= SSIZE_OF(f32); |
| FAIL_IF(emit_sse2_store(compiler, 0, SLJIT_MEM1(SLJIT_SP), offset, float_arg_count)); |
| float_arg_count--; |
| break; |
| default: |
| switch (word_arg_count) { |
| case 1: |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if (fast_call) { |
| EMIT_MOV(compiler, SLJIT_R2, 0, r2_offset != 0 ? SLJIT_MEM1(SLJIT_SP) : SLJIT_R0, 0); |
| break; |
| } |
| #endif |
| offset -= SSIZE_OF(sw); |
| if (r2_offset != 0) { |
| EMIT_MOV(compiler, SLJIT_R2, 0, SLJIT_MEM1(SLJIT_SP), 0); |
| EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), offset, SLJIT_R2, 0); |
| } else |
| EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), offset, SLJIT_R0, 0); |
| break; |
| case 2: |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if (fast_call) |
| break; |
| #endif |
| offset -= SSIZE_OF(sw); |
| EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), offset, SLJIT_R1, 0); |
| break; |
| case 3: |
| offset -= SSIZE_OF(sw); |
| EMIT_MOV(compiler, SLJIT_R2, 0, SLJIT_MEM1(SLJIT_SP), r2_offset); |
| EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), offset, SLJIT_R2, 0); |
| break; |
| } |
| word_arg_count--; |
| break; |
| } |
| types >>= SLJIT_ARG_SHIFT; |
| } |
| |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| /* Skip return address. */ |
| if (fast_call) |
| offset -= SSIZE_OF(sw); |
| #endif |
| |
| SLJIT_ASSERT(offset >= 0); |
| |
| if (offset == 0) |
| return SLJIT_SUCCESS; |
| |
| BINARY_IMM32(ADD, offset, SLJIT_SP, 0); |
| return SLJIT_SUCCESS; |
| } |
| |
| static sljit_s32 emit_tail_call_end(struct sljit_compiler *compiler, sljit_s32 extra_space) |
| { |
| /* Called when stack consumption cannot be reduced to 0. */ |
| sljit_u8 *inst; |
| |
| BINARY_IMM32(ADD, extra_space, SLJIT_SP, 0); |
| |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + 1); |
| FAIL_IF(!inst); |
| INC_SIZE(1); |
| RET(); |
| |
| return SLJIT_SUCCESS; |
| } |
| |
| SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_call(struct sljit_compiler *compiler, sljit_s32 type, |
| sljit_s32 arg_types) |
| { |
| struct sljit_jump *jump; |
| sljit_sw stack_size = 0; |
| sljit_s32 word_arg_count; |
| |
| CHECK_ERROR_PTR(); |
| CHECK_PTR(check_sljit_emit_call(compiler, type, arg_types)); |
| |
| if (type & SLJIT_CALL_RETURN) { |
| stack_size = type; |
| PTR_FAIL_IF(tail_call_with_args(compiler, &stack_size, arg_types, SLJIT_IMM, 0)); |
| |
| #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \ |
| || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS) |
| compiler->skip_checks = 1; |
| #endif |
| |
| if (stack_size == 0) { |
| type = SLJIT_JUMP | (type & SLJIT_REWRITABLE_JUMP); |
| return sljit_emit_jump(compiler, type); |
| } |
| |
| jump = sljit_emit_jump(compiler, type); |
| PTR_FAIL_IF(jump == NULL); |
| |
| PTR_FAIL_IF(emit_tail_call_end(compiler, stack_size)); |
| return jump; |
| } |
| |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if ((type & 0xff) == SLJIT_CALL) { |
| stack_size = c_fast_call_get_stack_size(arg_types, &word_arg_count); |
| PTR_FAIL_IF(c_fast_call_with_args(compiler, arg_types, stack_size, word_arg_count, 0)); |
| |
| #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \ |
| || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS) |
| compiler->skip_checks = 1; |
| #endif |
| |
| jump = sljit_emit_jump(compiler, type); |
| PTR_FAIL_IF(jump == NULL); |
| |
| PTR_FAIL_IF(post_call_with_args(compiler, arg_types, 0)); |
| return jump; |
| } |
| #endif |
| |
| stack_size = cdecl_call_get_stack_size(compiler, arg_types, &word_arg_count); |
| PTR_FAIL_IF(cdecl_call_with_args(compiler, arg_types, stack_size, word_arg_count)); |
| |
| #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \ |
| || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS) |
| compiler->skip_checks = 1; |
| #endif |
| |
| jump = sljit_emit_jump(compiler, type); |
| PTR_FAIL_IF(jump == NULL); |
| |
| PTR_FAIL_IF(post_call_with_args(compiler, arg_types, stack_size)); |
| return jump; |
| } |
| |
| SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_icall(struct sljit_compiler *compiler, sljit_s32 type, |
| sljit_s32 arg_types, |
| sljit_s32 src, sljit_sw srcw) |
| { |
| sljit_sw stack_size = 0; |
| sljit_s32 word_arg_count; |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| sljit_s32 swap_args; |
| #endif |
| |
| CHECK_ERROR(); |
| CHECK(check_sljit_emit_icall(compiler, type, arg_types, src, srcw)); |
| |
| if (type & SLJIT_CALL_RETURN) { |
| stack_size = type; |
| FAIL_IF(tail_call_with_args(compiler, &stack_size, arg_types, src, srcw)); |
| |
| if (!(src & SLJIT_IMM)) { |
| src = SLJIT_R0; |
| srcw = 0; |
| } |
| |
| #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \ |
| || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS) |
| compiler->skip_checks = 1; |
| #endif |
| |
| if (stack_size == 0) |
| return sljit_emit_ijump(compiler, SLJIT_JUMP, src, srcw); |
| |
| FAIL_IF(sljit_emit_ijump(compiler, type, src, srcw)); |
| return emit_tail_call_end(compiler, stack_size); |
| } |
| |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| SLJIT_ASSERT(reg_map[SLJIT_R0] == 0 && reg_map[SLJIT_R2] == 1 && SLJIT_R0 == 1 && SLJIT_R2 == 3); |
| |
| if ((type & 0xff) == SLJIT_CALL) { |
| stack_size = c_fast_call_get_stack_size(arg_types, &word_arg_count); |
| swap_args = 0; |
| |
| if (word_arg_count > 0) { |
| if ((src & REG_MASK) == SLJIT_R2 || OFFS_REG(src) == SLJIT_R2) { |
| swap_args = 1; |
| if (((src & REG_MASK) | 0x2) == SLJIT_R2) |
| src ^= 0x2; |
| if ((OFFS_REG(src) | 0x2) == SLJIT_R2) |
| src ^= TO_OFFS_REG(0x2); |
| } |
| } |
| |
| FAIL_IF(c_fast_call_with_args(compiler, arg_types, stack_size, word_arg_count, swap_args)); |
| |
| compiler->scratches_offset += stack_size; |
| compiler->locals_offset += stack_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, type, src, srcw)); |
| |
| compiler->scratches_offset -= stack_size; |
| compiler->locals_offset -= stack_size; |
| |
| return post_call_with_args(compiler, arg_types, 0); |
| } |
| #endif |
| |
| stack_size = cdecl_call_get_stack_size(compiler, arg_types, &word_arg_count); |
| FAIL_IF(cdecl_call_with_args(compiler, arg_types, stack_size, word_arg_count)); |
| |
| compiler->scratches_offset += stack_size; |
| compiler->locals_offset += stack_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, type, src, srcw)); |
| |
| compiler->scratches_offset -= stack_size; |
| compiler->locals_offset -= stack_size; |
| |
| return post_call_with_args(compiler, arg_types, stack_size); |
| } |
| |
| SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fast_enter(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw dstw) |
| { |
| sljit_u8 *inst; |
| |
| CHECK_ERROR(); |
| CHECK(check_sljit_emit_fast_enter(compiler, dst, dstw)); |
| ADJUST_LOCAL_OFFSET(dst, dstw); |
| |
| CHECK_EXTRA_REGS(dst, dstw, (void)0); |
| |
| if (FAST_IS_REG(dst)) { |
| /* Unused dest is possible here. */ |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + 1); |
| FAIL_IF(!inst); |
| |
| INC_SIZE(1); |
| POP_REG(reg_map[dst]); |
| return SLJIT_SUCCESS; |
| } |
| |
| /* Memory. */ |
| inst = emit_x86_instruction(compiler, 1, 0, 0, dst, dstw); |
| FAIL_IF(!inst); |
| *inst++ = POP_rm; |
| return SLJIT_SUCCESS; |
| } |
| |
| static sljit_s32 emit_fast_return(struct sljit_compiler *compiler, sljit_s32 src, sljit_sw srcw) |
| { |
| sljit_u8 *inst; |
| |
| CHECK_EXTRA_REGS(src, srcw, (void)0); |
| |
| if (FAST_IS_REG(src)) { |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + 1 + 1); |
| FAIL_IF(!inst); |
| |
| INC_SIZE(1 + 1); |
| PUSH_REG(reg_map[src]); |
| } |
| else { |
| inst = emit_x86_instruction(compiler, 1, 0, 0, src, srcw); |
| FAIL_IF(!inst); |
| *inst++ = GROUP_FF; |
| *inst |= PUSH_rm; |
| |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + 1); |
| FAIL_IF(!inst); |
| INC_SIZE(1); |
| } |
| |
| RET(); |
| return SLJIT_SUCCESS; |
| } |
| |
| static sljit_s32 skip_frames_before_return(struct sljit_compiler *compiler) |
| { |
| sljit_sw size; |
| |
| /* Don't adjust shadow stack if it isn't enabled. */ |
| if (!cpu_has_shadow_stack()) |
| return SLJIT_SUCCESS; |
| |
| SLJIT_ASSERT(compiler->args_size >= 0); |
| SLJIT_ASSERT(compiler->local_size > 0); |
| |
| size = compiler->local_size; |
| size += (1 + (compiler->scratches > 9 ? (compiler->scratches - 9) : 0) |
| + (compiler->saveds <= 3 ? compiler->saveds : 3)) * SSIZE_OF(sw); |
| |
| return adjust_shadow_stack(compiler, SLJIT_MEM1(SLJIT_SP), size); |
| } |