80 lines
2.5 KiB
C++
80 lines
2.5 KiB
C++
/* This file is part of the dynarmic project.
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* Copyright (c) 2016 MerryMage
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* This software may be used and distributed according to the terms of the GNU
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* General Public License version 2 or any later version.
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*/
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#include <dynarmic/A32/config.h>
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#include "frontend/ir/basic_block.h"
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#include "frontend/ir/opcodes.h"
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#include "ir_opt/passes.h"
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namespace Dynarmic::Optimization {
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void A32ConstantMemoryReads(IR::Block& block, A32::UserCallbacks* cb) {
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for (auto& inst : block) {
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switch (inst.GetOpcode()) {
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case IR::Opcode::A32SetCFlag: {
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const IR::Value arg = inst.GetArg(0);
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if (!arg.IsImmediate() && arg.GetInst()->GetOpcode() == IR::Opcode::A32GetCFlag) {
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inst.Invalidate();
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}
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break;
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}
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case IR::Opcode::A32ReadMemory8: {
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if (!inst.AreAllArgsImmediates()) {
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break;
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}
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const u32 vaddr = inst.GetArg(0).GetU32();
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if (cb->IsReadOnlyMemory(vaddr)) {
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const u8 value_from_memory = cb->MemoryRead8(vaddr);
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inst.ReplaceUsesWith(IR::Value{value_from_memory});
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}
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break;
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}
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case IR::Opcode::A32ReadMemory16: {
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if (!inst.AreAllArgsImmediates()) {
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break;
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}
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const u32 vaddr = inst.GetArg(0).GetU32();
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if (cb->IsReadOnlyMemory(vaddr)) {
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const u16 value_from_memory = cb->MemoryRead16(vaddr);
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inst.ReplaceUsesWith(IR::Value{value_from_memory});
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}
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break;
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}
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case IR::Opcode::A32ReadMemory32: {
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if (!inst.AreAllArgsImmediates()) {
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break;
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}
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const u32 vaddr = inst.GetArg(0).GetU32();
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if (cb->IsReadOnlyMemory(vaddr)) {
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const u32 value_from_memory = cb->MemoryRead32(vaddr);
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inst.ReplaceUsesWith(IR::Value{value_from_memory});
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}
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break;
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}
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case IR::Opcode::A32ReadMemory64: {
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if (!inst.AreAllArgsImmediates()) {
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break;
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}
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const u32 vaddr = inst.GetArg(0).GetU32();
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if (cb->IsReadOnlyMemory(vaddr)) {
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const u64 value_from_memory = cb->MemoryRead64(vaddr);
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inst.ReplaceUsesWith(IR::Value{value_from_memory});
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}
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break;
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}
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default:
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break;
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}
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}
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}
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} // namespace Dynarmic::Optimization
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