SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_fast_enter(struct sljit_compiler *compiler, sljit_si dst, sljit_sw dstw)
{
sljit_ub *inst;
CHECK_ERROR();
CHECK(check_sljit_emit_fast_enter(compiler, dst, dstw));
ADJUST_LOCAL_OFFSET(dst, dstw);
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_ub*)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);
if ((src & SLJIT_IMM) && NOT_HALFWORD(srcw)) {
FAIL_IF(emit_load_imm64(compiler, TMP_REG1, srcw));
src = TMP_REG1;
}
if (FAST_IS_REG(src)) {
if (reg_map[src] < 8) {
inst = (sljit_u8*)ensure_buf(compiler, 1 + 1 + 1);
FAIL_IF(!inst);
INC_SIZE(1 + 1);
PUSH_REG(reg_lmap[src]);
}
else {
inst = (sljit_u8*)ensure_buf(compiler, 1 + 2 + 1);
FAIL_IF(!inst);
INC_SIZE(2 + 1);
*inst++ = REX_B;
PUSH_REG(reg_lmap[src]);
}
}
else if (src & SLJIT_MEM) {
/* REX_W is not necessary (src is not immediate). */
compiler->mode32 = 1;
inst = emit_x86_instruction(compiler, 1, 0, 0, src, srcw);
FAIL_IF(!inst);
*inst++ = GROUP_FF;
*inst |= PUSH_rm;
inst = (sljit_u8*)ensure_buf(compiler, 1 + 1);
FAIL_IF(!inst);
INC_SIZE(1);
}
else {
SLJIT_ASSERT(IS_HALFWORD(srcw));
/* SLJIT_IMM. */
inst = (sljit_u8*)ensure_buf(compiler, 1 + 5 + 1);
FAIL_IF(!inst);
INC_SIZE(5 + 1);
*inst++ = PUSH_i32;
sljit_unaligned_store_s32(inst, srcw);
inst += sizeof(sljit_s32);
}
RET();
return SLJIT_SUCCESS;
}
SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_fast_return(struct sljit_compiler *compiler, sljit_si src, sljit_sw srcw)
{
sljit_ub *inst;
CHECK_ERROR();
CHECK(check_sljit_emit_fast_return(compiler, src, srcw));
ADJUST_LOCAL_OFFSET(src, srcw);
CHECK_EXTRA_REGS(src, srcw, (void)0);
if (FAST_IS_REG(src)) {
inst = (sljit_ub*)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_ub*)ensure_buf(compiler, 1 + 1);
FAIL_IF(!inst);
INC_SIZE(1);
}
else {
/* SLJIT_IMM. */
inst = (sljit_ub*)ensure_buf(compiler, 1 + 5 + 1);
FAIL_IF(!inst);
INC_SIZE(5 + 1);
*inst++ = PUSH_i32;
*(sljit_sw*)inst = srcw;
inst += sizeof(sljit_sw);
}
RET();
return SLJIT_SUCCESS;
}
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);
/* For UNUSED dst. Uncommon, but possible. */
if (dst == SLJIT_UNUSED)
dst = TMP_REG1;
if (FAST_IS_REG(dst)) {
if (reg_map[dst] < 8) {
inst = (sljit_u8*)ensure_buf(compiler, 1 + 1);
FAIL_IF(!inst);
INC_SIZE(1);
POP_REG(reg_lmap[dst]);
return SLJIT_SUCCESS;
}
inst = (sljit_u8*)ensure_buf(compiler, 1 + 2);
FAIL_IF(!inst);
INC_SIZE(2);
*inst++ = REX_B;
POP_REG(reg_lmap[dst]);
return SLJIT_SUCCESS;
}
/* REX_W is not necessary (src is not immediate). */
compiler->mode32 = 1;
inst = emit_x86_instruction(compiler, 1, 0, 0, dst, dstw);
FAIL_IF(!inst);
*inst++ = POP_rm;
return SLJIT_SUCCESS;
}