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[JIT] New opcodes: OPCODE_LOAD_OFFSET and OPCODE_STORE_OFFSET

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These take full advantage of x86 addressing, and eliminate extra add operations.
This commit is contained in:
DrChat
2018-02-14 16:26:49 -06:00
parent 1de598e4ce
commit e54c24e150
8 changed files with 352 additions and 35 deletions
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14
src/xenia/cpu/compiler/passes/constant_propagation_pass.cc
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@@ -195,10 +195,15 @@ bool ConstantPropagationPass::Run(HIRBuilder* builder) {
break;
case OPCODE_LOAD:
case OPCODE_LOAD_OFFSET:
if (i->src1.value->IsConstant()) {
assert_false(i->flags & LOAD_STORE_BYTE_SWAP);
auto memory = processor_->memory();
auto address = i->src1.value->constant.i32;
if (i->opcode->num == OPCODE_LOAD_OFFSET) {
address += i->src2.value->constant.i32;
}
auto mmio_range =
processor_->memory()->LookupVirtualMappedRange(address);
if (FLAGS_inline_mmio_access && mmio_range) {
@@ -246,12 +251,21 @@ bool ConstantPropagationPass::Run(HIRBuilder* builder) {
}
break;
case OPCODE_STORE:
case OPCODE_STORE_OFFSET:
if (FLAGS_inline_mmio_access && i->src1.value->IsConstant()) {
auto address = i->src1.value->constant.i32;
if (i->opcode->num == OPCODE_STORE_OFFSET) {
address += i->src2.value->constant.i32;
}
auto mmio_range =
processor_->memory()->LookupVirtualMappedRange(address);
if (mmio_range) {
auto value = i->src2.value;
if (i->opcode->num == OPCODE_STORE_OFFSET) {
value = i->src3.value;
}
i->Replace(&OPCODE_STORE_MMIO_info, 0);
i->src1.offset = reinterpret_cast<uint64_t>(mmio_range);
i->src2.offset = address;