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https://github.com/RetroDECK/Duckstation.git
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CPU/Recompiler: Remove unused code
This commit is contained in:
Connor McLaughlin
parent
20c7aaf74b
commit
a267451614
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@ -131,12 +131,6 @@ public:
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void EmitPushHostReg(HostReg reg, u32 position);
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void EmitPopHostReg(HostReg reg, u32 position);
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// Flags copying from host.
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#if defined(Y_CPU_X64)
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void ReadFlagsFromHost(Value* value);
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Value ReadFlagsFromHost();
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#endif
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// Value ops
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Value AddValues(const Value& lhs, const Value& rhs, bool set_flags);
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Value SubValues(const Value& lhs, const Value& rhs, bool set_flags);
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@ -1369,21 +1369,6 @@ void CodeGenerator::EmitPopHostReg(HostReg reg, u32 position)
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m_emit->pop(GetHostReg64(reg));
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}
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void CodeGenerator::ReadFlagsFromHost(Value* value)
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{
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// this is a 64-bit push/pop, we ignore the upper 32 bits
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DebugAssert(value->IsInHostRegister());
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m_emit->pushf();
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m_emit->pop(GetHostReg64(value->host_reg));
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}
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Value CodeGenerator::ReadFlagsFromHost()
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{
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Value temp = m_register_cache.AllocateScratch(RegSize_32);
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ReadFlagsFromHost(&temp);
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return temp;
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}
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void CodeGenerator::EmitLoadCPUStructField(HostReg host_reg, RegSize guest_size, u32 offset)
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{
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switch (guest_size)
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@ -1867,207 +1852,6 @@ void CodeGenerator::EmitRaiseException(Exception excode, Condition condition /*
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m_register_cache.PopState();
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}
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#if 0
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class ThunkGenerator
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{
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public:
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template<typename DataType>
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static DataType (*CompileMemoryReadFunction(JitCodeBuffer* code_buffer))(u8, u32)
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{
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using FunctionType = DataType (*)(u8, u32);
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const auto rret = GetHostReg64(RRETURN);
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const auto rcpuptr = GetHostReg64(RCPUPTR);
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const auto rarg1 = GetHostReg32(RARG1);
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const auto rarg2 = GetHostReg32(RARG2);
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const auto rarg3 = GetHostReg32(RARG3);
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const auto scratch = GetHostReg64(RARG3);
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Xbyak::CodeGenerator emitter(code_buffer->GetFreeCodeSpace(), code_buffer->GetFreeCodePointer());
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// ensure function starts at aligned 16 bytes
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emitter.align();
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FunctionType ret = emitter.getCurr<FunctionType>();
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// TODO: We can skip these if the base address is zero and the size is 4GB.
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Xbyak::Label raise_gpf_label;
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static_assert(sizeof(CPU::SegmentCache) == 16);
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emitter.movzx(rarg1, rarg1.cvt8());
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emitter.shl(rarg1, 4);
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emitter.lea(rret, emitter.byte[rcpuptr + rarg1.cvt64() + offsetof(CPU, m_segment_cache[0])]);
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// if segcache->access_mask & Read == 0
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emitter.test(emitter.byte[rret + offsetof(CPU::SegmentCache, access_mask)], static_cast<u32>(AccessTypeMask::Read));
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emitter.jz(raise_gpf_label);
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// if offset < limit_low
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emitter.cmp(rarg2, emitter.dword[rret + offsetof(CPU::SegmentCache, limit_low)]);
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emitter.jb(raise_gpf_label);
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// if offset + (size - 1) > limit_high
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// offset += segcache->base_address
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if constexpr (sizeof(DataType) > 1)
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{
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emitter.lea(scratch, emitter.qword[rarg2.cvt64() + (sizeof(DataType) - 1)]);
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emitter.add(rarg2, emitter.dword[rret + offsetof(CPU::SegmentCache, base_address)]);
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emitter.mov(rret.cvt32(), emitter.dword[rret + offsetof(CPU::SegmentCache, limit_high)]);
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emitter.cmp(scratch, rret);
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emitter.ja(raise_gpf_label);
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}
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else
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{
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emitter.cmp(rarg2, emitter.dword[rret + offsetof(CPU::SegmentCache, limit_high)]);
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emitter.ja(raise_gpf_label);
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emitter.add(rarg2, emitter.dword[rret + offsetof(CPU::SegmentCache, base_address)]);
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}
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// swap segment with CPU
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emitter.mov(rarg1, rcpuptr);
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// go ahead with the memory read
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if constexpr (std::is_same_v<DataType, u8>)
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{
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emitter.mov(rret, reinterpret_cast<size_t>(static_cast<u8 (*)(CPU*, LinearMemoryAddress)>(&CPU::ReadMemoryByte)));
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}
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else if constexpr (std::is_same_v<DataType, u16>)
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{
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emitter.mov(rret,
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reinterpret_cast<size_t>(static_cast<u16 (*)(CPU*, LinearMemoryAddress)>(&CPU::ReadMemoryWord)));
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}
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else
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{
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emitter.mov(rret,
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reinterpret_cast<size_t>(static_cast<u32 (*)(CPU*, LinearMemoryAddress)>(&CPU::ReadMemoryDWord)));
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}
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emitter.jmp(rret);
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// RAISE GPF BRANCH
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emitter.L(raise_gpf_label);
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// register swap since the CPU has to come first
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emitter.cmp(rarg1, (Segment_SS << 4));
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emitter.mov(rarg1, Interrupt_StackFault);
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emitter.mov(rarg2, Interrupt_GeneralProtectionFault);
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emitter.cmove(rarg2, rarg1);
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emitter.xor_(rarg3, rarg3);
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emitter.mov(rarg1, rcpuptr);
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// cpu->RaiseException(ss ? Interrupt_StackFault : Interrupt_GeneralProtectionFault, 0)
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emitter.mov(rret, reinterpret_cast<size_t>(static_cast<void (*)(CPU*, u32, u32)>(&CPU::RaiseException)));
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emitter.jmp(rret);
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emitter.ready();
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code_buffer->CommitCode(emitter.getSize());
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return ret;
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}
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template<typename DataType>
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static void (*CompileMemoryWriteFunction(JitCodeBuffer* code_buffer))(u8, u32, DataType)
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{
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using FunctionType = void (*)(u8, u32, DataType);
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const auto rret = GetHostReg64(RRETURN);
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const auto rcpuptr = GetHostReg64(RCPUPTR);
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const auto rarg1 = GetHostReg32(RARG1);
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const auto rarg2 = GetHostReg32(RARG2);
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const auto rarg3 = GetHostReg32(RARG3);
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const auto scratch = GetHostReg64(RARG4);
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Xbyak::CodeGenerator emitter(code_buffer->GetFreeCodeSpace(), code_buffer->GetFreeCodePointer());
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// ensure function starts at aligned 16 bytes
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emitter.align();
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FunctionType ret = emitter.getCurr<FunctionType>();
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// TODO: We can skip these if the base address is zero and the size is 4GB.
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Xbyak::Label raise_gpf_label;
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static_assert(sizeof(CPU::SegmentCache) == 16);
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emitter.movzx(rarg1, rarg1.cvt8());
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emitter.shl(rarg1, 4);
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emitter.lea(rret, emitter.byte[rcpuptr + rarg1.cvt64() + offsetof(CPU, m_segment_cache[0])]);
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// if segcache->access_mask & Read == 0
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emitter.test(emitter.byte[rret + offsetof(CPU::SegmentCache, access_mask)],
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static_cast<u32>(AccessTypeMask::Write));
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emitter.jz(raise_gpf_label);
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// if offset < limit_low
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emitter.cmp(rarg2, emitter.dword[rret + offsetof(CPU::SegmentCache, limit_low)]);
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emitter.jb(raise_gpf_label);
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// if offset + (size - 1) > limit_high
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// offset += segcache->base_address
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if constexpr (sizeof(DataType) > 1)
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{
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emitter.lea(scratch, emitter.qword[rarg2.cvt64() + (sizeof(DataType) - 1)]);
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emitter.add(rarg2, emitter.dword[rret + offsetof(CPU::SegmentCache, base_address)]);
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emitter.mov(rret.cvt32(), emitter.dword[rret + offsetof(CPU::SegmentCache, limit_high)]);
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emitter.cmp(scratch, rret.cvt64());
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emitter.ja(raise_gpf_label);
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}
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else
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{
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emitter.cmp(rarg2, emitter.dword[rret + offsetof(CPU::SegmentCache, limit_high)]);
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emitter.ja(raise_gpf_label);
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emitter.add(rarg2, emitter.dword[rret + offsetof(CPU::SegmentCache, base_address)]);
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}
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// swap segment with CPU
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emitter.mov(rarg1, rcpuptr);
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// go ahead with the memory read
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if constexpr (std::is_same_v<DataType, u8>)
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{
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emitter.mov(
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rret, reinterpret_cast<size_t>(static_cast<void (*)(CPU*, LinearMemoryAddress, u8)>(&CPU::WriteMemoryByte)));
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}
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else if constexpr (std::is_same_v<DataType, u16>)
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{
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emitter.mov(
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rret, reinterpret_cast<size_t>(static_cast<void (*)(CPU*, LinearMemoryAddress, u16)>(&CPU::WriteMemoryWord)));
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}
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else
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{
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emitter.mov(
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rret, reinterpret_cast<size_t>(static_cast<void (*)(CPU*, LinearMemoryAddress, u32)>(&CPU::WriteMemoryDWord)));
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}
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emitter.jmp(rret);
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// RAISE GPF BRANCH
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emitter.L(raise_gpf_label);
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// register swap since the CPU has to come first
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emitter.cmp(rarg1, (Segment_SS << 4));
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emitter.mov(rarg1, Interrupt_StackFault);
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emitter.mov(rarg2, Interrupt_GeneralProtectionFault);
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emitter.cmove(rarg2, rarg1);
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emitter.xor_(rarg3, rarg3);
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emitter.mov(rarg1, rcpuptr);
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// cpu->RaiseException(ss ? Interrupt_StackFault : Interrupt_GeneralProtectionFault, 0)
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emitter.mov(rret, reinterpret_cast<size_t>(static_cast<void (*)(CPU*, u32, u32)>(&CPU::RaiseException)));
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emitter.jmp(rret);
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emitter.ready();
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code_buffer->CommitCode(emitter.getSize());
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return ret;
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}
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};
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#endif
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void ASMFunctions::Generate(JitCodeBuffer* code_buffer)
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{
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#if 0
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read_memory_byte = ThunkGenerator::CompileMemoryReadFunction<u8>(code_buffer);
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read_memory_word = ThunkGenerator::CompileMemoryReadFunction<u16>(code_buffer);
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read_memory_dword = ThunkGenerator::CompileMemoryReadFunction<u32>(code_buffer);
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write_memory_byte = ThunkGenerator::CompileMemoryWriteFunction<u8>(code_buffer);
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write_memory_word = ThunkGenerator::CompileMemoryWriteFunction<u16>(code_buffer);
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write_memory_dword = ThunkGenerator::CompileMemoryWriteFunction<u32>(code_buffer);
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#endif
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}
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void ASMFunctions::Generate(JitCodeBuffer* code_buffer) {}
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} // namespace CPU::Recompiler
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