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pcre2/src/sljit/sljitNativeX86_32.c

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/*
* 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. */
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;
}
static sljit_u8* generate_far_jump_code(struct sljit_jump *jump, sljit_u8 *code_ptr, sljit_s32 type, sljit_sw executable_offset)
{
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, jump->u.target - (jump->addr + 4) - (sljit_uw)executable_offset);
code_ptr += 4;
return code_ptr;
}
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 args, size;
sljit_u8 *inst;
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);
args = get_arg_count(arg_types);
compiler->args = args;
/* [esp+0] for saving temporaries and function calls. */
compiler->stack_tmp_size = 2 * sizeof(sljit_sw);
#if !(defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
if (scratches > 3)
compiler->stack_tmp_size = 3 * sizeof(sljit_sw);
#endif
compiler->saveds_offset = compiler->stack_tmp_size;
if (scratches > 3)
compiler->saveds_offset += ((scratches > (3 + 6)) ? 6 : (scratches - 3)) * sizeof(sljit_sw);
compiler->locals_offset = compiler->saveds_offset;
if (saveds > 3)
compiler->locals_offset += (saveds - 3) * sizeof(sljit_sw);
if (options & SLJIT_F64_ALIGNMENT)
compiler->locals_offset = (compiler->locals_offset + sizeof(sljit_f64) - 1) & ~(sizeof(sljit_f64) - 1);
size = 1 + (scratches > 9 ? (scratches - 9) : 0) + (saveds <= 3 ? saveds : 3);
#if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
size += (args > 0 ? (args * 2) : 0) + (args > 2 ? 2 : 0);
#else
size += (args > 0 ? (2 + args * 3) : 0);
#endif
inst = (sljit_u8*)ensure_buf(compiler, 1 + size);
FAIL_IF(!inst);
INC_SIZE(size);
PUSH_REG(reg_map[TMP_REG1]);
#if !(defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
if (args > 0) {
*inst++ = MOV_r_rm;
*inst++ = MOD_REG | (reg_map[TMP_REG1] << 3) | 0x4 /* esp */;
}
#endif
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]);
#if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
if (args > 0) {
*inst++ = MOV_r_rm;
*inst++ = MOD_REG | (reg_map[SLJIT_S0] << 3) | reg_map[SLJIT_R2];
}
if (args > 1) {
*inst++ = MOV_r_rm;
*inst++ = MOD_REG | (reg_map[SLJIT_S1] << 3) | reg_map[SLJIT_R1];
}
if (args > 2) {
*inst++ = MOV_r_rm;
*inst++ = MOD_DISP8 | (reg_map[SLJIT_S2] << 3) | 0x4 /* esp */;
*inst++ = 0x24;
*inst++ = sizeof(sljit_sw) * (3 + 2); /* saveds >= 3 as well. */
}
#else
if (args > 0) {
*inst++ = MOV_r_rm;
*inst++ = MOD_DISP8 | (reg_map[SLJIT_S0] << 3) | reg_map[TMP_REG1];
*inst++ = sizeof(sljit_sw) * 2;
}
if (args > 1) {
*inst++ = MOV_r_rm;
*inst++ = MOD_DISP8 | (reg_map[SLJIT_S1] << 3) | reg_map[TMP_REG1];
*inst++ = sizeof(sljit_sw) * 3;
}
if (args > 2) {
*inst++ = MOV_r_rm;
*inst++ = MOD_DISP8 | (reg_map[SLJIT_S2] << 3) | reg_map[TMP_REG1];
*inst++ = sizeof(sljit_sw) * 4;
}
#endif
SLJIT_ASSERT(SLJIT_LOCALS_OFFSET > 0);
#if defined(__APPLE__)
/* Ignore pushed registers and SLJIT_LOCALS_OFFSET when computing the aligned local size. */
saveds = (2 + (scratches > 9 ? (scratches - 9) : 0) + (saveds <= 3 ? saveds : 3)) * sizeof(sljit_uw);
local_size = ((SLJIT_LOCALS_OFFSET + saveds + local_size + 15) & ~15) - saveds;
#else
if (options & SLJIT_F64_ALIGNMENT)
local_size = SLJIT_LOCALS_OFFSET + ((local_size + sizeof(sljit_f64) - 1) & ~(sizeof(sljit_f64) - 1));
else
local_size = SLJIT_LOCALS_OFFSET + ((local_size + sizeof(sljit_sw) - 1) & ~(sizeof(sljit_sw) - 1));
#endif
compiler->local_size = local_size;
#ifdef _WIN32
if (local_size > 1024) {
#if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
FAIL_IF(emit_do_imm(compiler, MOV_r_i32 + reg_map[SLJIT_R0], local_size));
#else
/* Space for a single argument. This amount is excluded when the stack is allocated below. */
local_size -= sizeof(sljit_sw);
FAIL_IF(emit_do_imm(compiler, MOV_r_i32 + reg_map[SLJIT_R0], local_size));
FAIL_IF(emit_non_cum_binary(compiler, BINARY_OPCODE(SUB),
SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, sizeof(sljit_sw)));
#endif
FAIL_IF(sljit_emit_icall(compiler, SLJIT_CALL, SLJIT_ARG1(SW), SLJIT_IMM, SLJIT_FUNC_OFFSET(sljit_grow_stack)));
}
#endif
SLJIT_ASSERT(local_size > 0);
#if !defined(__APPLE__)
if (options & SLJIT_F64_ALIGNMENT) {
EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_SP, 0);
/* Some space might allocated during sljit_grow_stack() above on WIN32. */
FAIL_IF(emit_non_cum_binary(compiler, BINARY_OPCODE(SUB),
SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, local_size + sizeof(sljit_sw)));
#if defined _WIN32 && !(defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
if (compiler->local_size > 1024)
FAIL_IF(emit_cum_binary(compiler, BINARY_OPCODE(ADD),
TMP_REG1, 0, TMP_REG1, 0, SLJIT_IMM, sizeof(sljit_sw)));
#endif
inst = (sljit_u8*)ensure_buf(compiler, 1 + 6);
FAIL_IF(!inst);
INC_SIZE(6);
inst[0] = GROUP_BINARY_81;
inst[1] = MOD_REG | AND | reg_map[SLJIT_SP];
sljit_unaligned_store_sw(inst + 2, ~(sizeof(sljit_f64) - 1));
/* The real local size must be used. */
return emit_mov(compiler, SLJIT_MEM1(SLJIT_SP), compiler->local_size, TMP_REG1, 0);
}
#endif
return emit_non_cum_binary(compiler, BINARY_OPCODE(SUB),
SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, local_size);
}
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)
{
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);
compiler->args = get_arg_count(arg_types);
/* [esp+0] for saving temporaries and function calls. */
compiler->stack_tmp_size = 2 * sizeof(sljit_sw);
#if !(defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
if (scratches > 3)
compiler->stack_tmp_size = 3 * sizeof(sljit_sw);
#endif
compiler->saveds_offset = compiler->stack_tmp_size;
if (scratches > 3)
compiler->saveds_offset += ((scratches > (3 + 6)) ? 6 : (scratches - 3)) * sizeof(sljit_sw);
compiler->locals_offset = compiler->saveds_offset;
if (saveds > 3)
compiler->locals_offset += (saveds - 3) * sizeof(sljit_sw);
if (options & SLJIT_F64_ALIGNMENT)
compiler->locals_offset = (compiler->locals_offset + sizeof(sljit_f64) - 1) & ~(sizeof(sljit_f64) - 1);
#if defined(__APPLE__)
saveds = (2 + (scratches > 9 ? (scratches - 9) : 0) + (saveds <= 3 ? saveds : 3)) * sizeof(sljit_uw);
compiler->local_size = ((SLJIT_LOCALS_OFFSET + saveds + local_size + 15) & ~15) - saveds;
#else
if (options & SLJIT_F64_ALIGNMENT)
compiler->local_size = SLJIT_LOCALS_OFFSET + ((local_size + sizeof(sljit_f64) - 1) & ~(sizeof(sljit_f64) - 1));
else
compiler->local_size = SLJIT_LOCALS_OFFSET + ((local_size + sizeof(sljit_sw) - 1) & ~(sizeof(sljit_sw) - 1));
#endif
return SLJIT_SUCCESS;
}
SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_return(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 src, sljit_sw srcw)
{
sljit_s32 size;
sljit_u8 *inst;
CHECK_ERROR();
CHECK(check_sljit_emit_return(compiler, op, src, srcw));
SLJIT_ASSERT(compiler->args >= 0);
FAIL_IF(emit_mov_before_return(compiler, op, src, srcw));
SLJIT_ASSERT(compiler->local_size > 0);
#if !defined(__APPLE__)
if (compiler->options & SLJIT_F64_ALIGNMENT)
EMIT_MOV(compiler, SLJIT_SP, 0, SLJIT_MEM1(SLJIT_SP), compiler->local_size)
else
FAIL_IF(emit_cum_binary(compiler, BINARY_OPCODE(ADD),
SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, compiler->local_size));
#else
FAIL_IF(emit_cum_binary(compiler, BINARY_OPCODE(ADD),
SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, compiler->local_size));
#endif
size = 2 + (compiler->scratches > 7 ? (compiler->scratches - 7) : 0) +
(compiler->saveds <= 3 ? compiler->saveds : 3);
#if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
if (compiler->args > 2)
size += 2;
#else
if (compiler->args > 0)
size += 2;
#endif
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]);
#if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
if (compiler->args > 2)
RET_I16(sizeof(sljit_sw));
else
RET();
#else
RET();
#endif
return SLJIT_SUCCESS;
}
/* --------------------------------------------------------------------- */
/* Operators */
/* --------------------------------------------------------------------- */
/* Size contains the flags as well. */
static sljit_u8* emit_x86_instruction(struct sljit_compiler *compiler, sljit_s32 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_s32 flags = size & ~0xf;
sljit_s32 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) == SLJIT_UNUSED)
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);
}
if ((b & REG_MASK) == SLJIT_SP && !(b & OFFS_REG_MASK))
b |= TO_OFFS_REG(SLJIT_SP);
if ((b & OFFS_REG_MASK) != SLJIT_UNUSED)
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 = reg_map[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_map[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) {
if (immb <= 127 && immb >= -128)
*buf_ptr |= 0x40;
else
*buf_ptr |= 0x80;
}
if ((b & OFFS_REG_MASK) == SLJIT_UNUSED)
*buf_ptr++ |= reg_map[b & REG_MASK];
else {
*buf_ptr++ |= 0x04;
*buf_ptr++ = reg_map[b & REG_MASK] | (reg_map[OFFS_REG(b)] << 3);
}
if (immb != 0) {
if (immb <= 127 && immb >= -128)
*buf_ptr++ = 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++ = reg_map[b & REG_MASK] | (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 = imma;
else if (flags & EX86_HALF_ARG)
sljit_unaligned_store_s16(buf_ptr, imma);
else if (!(flags & EX86_SHIFT_INS))
sljit_unaligned_store_sw(buf_ptr, imma);
}
return !(flags & EX86_SHIFT_INS) ? inst : (inst + 1);
}
/* --------------------------------------------------------------------- */
/* Call / return instructions */
/* --------------------------------------------------------------------- */
#if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
static sljit_s32 c_fast_call_get_stack_size(sljit_s32 arg_types, sljit_s32 *word_arg_count_ptr)
{
sljit_s32 stack_size = 0;
sljit_s32 word_arg_count = 0;
arg_types >>= SLJIT_DEF_SHIFT;
while (arg_types) {
switch (arg_types & SLJIT_DEF_MASK) {
case SLJIT_ARG_TYPE_F32:
stack_size += sizeof(sljit_f32);
break;
case SLJIT_ARG_TYPE_F64:
stack_size += sizeof(sljit_f64);
break;
default:
word_arg_count++;
if (word_arg_count > 2)
stack_size += sizeof(sljit_sw);
break;
}
arg_types >>= SLJIT_DEF_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_s32 stack_size, sljit_s32 word_arg_count, sljit_s32 swap_args)
{
sljit_u8 *inst;
sljit_s32 float_arg_count;
if (stack_size == sizeof(sljit_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->saveds_offset - sizeof(sljit_sw));
FAIL_IF(emit_non_cum_binary(compiler, BINARY_OPCODE(SUB),
SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, stack_size));
stack_size = 0;
arg_types >>= SLJIT_DEF_SHIFT;
word_arg_count = 0;
float_arg_count = 0;
while (arg_types) {
switch (arg_types & SLJIT_DEF_MASK) {
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 += sizeof(sljit_f32);
break;
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 += sizeof(sljit_f64);
break;
default:
word_arg_count++;
if (word_arg_count == 3) {
EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), stack_size, SLJIT_R2, 0);
stack_size += sizeof(sljit_sw);
}
else if (word_arg_count == 4) {
EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), stack_size, TMP_REG1, 0);
stack_size += sizeof(sljit_sw);
}
break;
}
arg_types >>= SLJIT_DEF_SHIFT;
}
}
if (word_arg_count > 0) {
if (swap_args) {
inst = (sljit_u8*)ensure_buf(compiler, 1 + 1);
FAIL_IF(!inst);
INC_SIZE(1);
*inst++ = 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++ = 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_s32 stack_size = 0;
sljit_s32 word_arg_count = 0;
arg_types >>= SLJIT_DEF_SHIFT;
while (arg_types) {
switch (arg_types & SLJIT_DEF_MASK) {
case SLJIT_ARG_TYPE_F32:
stack_size += sizeof(sljit_f32);
break;
case SLJIT_ARG_TYPE_F64:
stack_size += sizeof(sljit_f64);
break;
default:
word_arg_count++;
stack_size += sizeof(sljit_sw);
break;
}
arg_types >>= SLJIT_DEF_SHIFT;
}
if (word_arg_count_ptr)
*word_arg_count_ptr = word_arg_count;
if (stack_size <= compiler->stack_tmp_size)
return 0;
#if defined(__APPLE__)
return ((stack_size - compiler->stack_tmp_size + 15) & ~15);
#else
return stack_size - compiler->stack_tmp_size;
#endif
}
static sljit_s32 cdecl_call_with_args(struct sljit_compiler *compiler,
sljit_s32 arg_types, sljit_s32 stack_size, sljit_s32 word_arg_count)
{
sljit_s32 float_arg_count = 0;
if (word_arg_count >= 4)
EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_MEM1(SLJIT_SP), compiler->saveds_offset - sizeof(sljit_sw));
if (stack_size > 0)
FAIL_IF(emit_non_cum_binary(compiler, BINARY_OPCODE(SUB),
SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, stack_size));
stack_size = 0;
word_arg_count = 0;
arg_types >>= SLJIT_DEF_SHIFT;
while (arg_types) {
switch (arg_types & SLJIT_DEF_MASK) {
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 += sizeof(sljit_f32);
break;
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 += sizeof(sljit_f64);
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 += sizeof(sljit_sw);
break;
}
arg_types >>= SLJIT_DEF_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)
FAIL_IF(emit_cum_binary(compiler, BINARY_OPCODE(ADD),
SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, stack_size));
if ((arg_types & SLJIT_DEF_MASK) < SLJIT_ARG_TYPE_F32)
return SLJIT_SUCCESS;
single = ((arg_types & SLJIT_DEF_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);
}
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_s32 stack_size = 0;
sljit_s32 word_arg_count;
CHECK_ERROR_PTR();
CHECK_PTR(check_sljit_emit_call(compiler, type, arg_types));
#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_s32 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 (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->saveds_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->saveds_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->saveds_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->saveds_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);
/* For UNUSED dst. Uncommon, but possible. */
if (dst == SLJIT_UNUSED)
dst = TMP_REG1;
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;
}
SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fast_return(struct sljit_compiler *compiler, sljit_s32 src, sljit_sw srcw)
{
sljit_u8 *inst;
CHECK_ERROR();
CHECK(check_sljit_emit_fast_return(compiler, src, srcw));
ADJUST_LOCAL_OFFSET(src, srcw);
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 if (src & SLJIT_MEM) {
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);
}
else {
/* SLJIT_IMM. */
inst = (sljit_u8*)ensure_buf(compiler, 1 + 5 + 1);
FAIL_IF(!inst);
INC_SIZE(5 + 1);
*inst++ = PUSH_i32;
sljit_unaligned_store_sw(inst, srcw);
inst += sizeof(sljit_sw);
}
RET();
return SLJIT_SUCCESS;
}
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