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Add dynarec optimisation for UOP_MOV_IMM, to avoid register allocation

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if the destination register won't be immediately used again.
This commit is contained in:
SarahW 2020-09-16 20:47:12 +01:00
commit 25fe224ea9
12 changed files with 216 additions and 1 deletions
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44
src/codegen_backend_x86-64_ops.c
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@ -517,6 +517,26 @@ void host_x86_MOV8_ABS_IMM(codeblock_t *block, void *p, uint32_t imm_data)
codegen_addbyte(block, imm_data);
}
}
void host_x86_MOV16_ABS_IMM(codeblock_t *block, void *p, uint16_t imm_data)
{
int64_t offset = (uintptr_t)p - (((uintptr_t)&cpu_state) + 128);
if (offset >= -128 && offset < 127)
{
codegen_alloc_bytes(block, 6);
codegen_addbyte4(block, 0x66, 0xc7, 0x45, offset); /*MOV offset[RBP], imm_data*/
codegen_addword(block, imm_data);
}
else
{
if ((uintptr_t)p >> 32)
fatal("host_x86_MOV32_ABS_IMM - out of range %p\n", p);
codegen_alloc_bytes(block, 10);
codegen_addbyte4(block, 0x66, 0xc7, 0x04, 0x25); /*MOV p, imm_data*/
codegen_addlong(block, (uint32_t)(uintptr_t)p);
codegen_addword(block, imm_data);
}
}
void host_x86_MOV32_ABS_IMM(codeblock_t *block, void *p, uint32_t imm_data)
{
int64_t offset = (uintptr_t)p - (((uintptr_t)&cpu_state) + 128);
@ -941,6 +961,30 @@ void host_x86_MOV64_BASE_OFFSET_REG(codeblock_t *block, int base_reg, int offset
fatal("MOV64_BASE_OFFSET_REG - offset %i\n", offset);
}
void host_x86_MOV32_BASE_OFFSET_IMM(codeblock_t *block, int base_reg, int offset, uint32_t imm_data)
{
if (base_reg & 8)
fatal("host_x86_MOV32_BASE_OFFSET_IMM reg & 8\n");
if (offset >= -128 && offset < 127)
{
if (base_reg == REG_RSP)
{
codegen_alloc_bytes(block, 8);
codegen_addbyte4(block, 0xc7, 0x40 | base_reg, 0x24, offset);
codegen_addlong(block, imm_data);
}
else
{
codegen_alloc_bytes(block, 7);
codegen_addbyte3(block, 0xc7, 0x40 | base_reg, offset);
codegen_addlong(block, imm_data);
}
}
else
fatal("MOV32_BASE_OFFSET_IMM - offset %i\n", offset);
}
void host_x86_MOV8_REG_IMM(codeblock_t *block, int reg, uint16_t imm_data)
{
if (reg >= 8)