mirror of
https://github.com/azahar-emu/dynarmic
synced 2025-11-17 04:20:01 +01:00
0ec8dac660
This code was bugged in that we were comparing if the rounding mode was not equal to rounding towards zero. Fortunately, however, nothing uses this function anymore, and there's already the more general FPSCR_RMode() available, so this can be removed entirely.
123 lines
4.3 KiB
C++
123 lines
4.3 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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#pragma once
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#include <array>
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#include <type_traits>
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#include <unordered_map>
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#include <unordered_set>
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#include <vector>
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#include <boost/optional.hpp>
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#include <xbyak_util.h>
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#include "backend_x64/reg_alloc.h"
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#include "common/address_range.h"
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#include "common/bit_util.h"
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#include "common/fp/rounding_mode.h"
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#include "frontend/ir/location_descriptor.h"
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#include "frontend/ir/terminal.h"
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namespace Dynarmic::IR {
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class Block;
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class Inst;
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} // namespace Dynarmic::IR
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namespace Dynarmic::BackendX64 {
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class BlockOfCode;
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using A64FullVectorWidth = std::integral_constant<size_t, 128>;
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// Array alias that always sizes itself according to the given type T
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// relative to the size of a vector register. e.g. T = u32 would result
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// in a std::array<u32, 4>.
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template <typename T>
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using VectorArray = std::array<T, A64FullVectorWidth::value / Common::BitSize<T>()>;
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struct EmitContext {
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EmitContext(RegAlloc& reg_alloc, IR::Block& block);
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void EraseInstruction(IR::Inst* inst);
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virtual FP::RoundingMode FPSCR_RMode() const = 0;
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virtual u32 FPCR() const = 0;
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virtual bool FPSCR_FTZ() const = 0;
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virtual bool FPSCR_DN() const = 0;
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virtual bool AccurateNaN() const { return true; }
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RegAlloc& reg_alloc;
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IR::Block& block;
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};
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class EmitX64 {
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public:
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struct BlockDescriptor {
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CodePtr entrypoint; // Entrypoint of emitted code
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size_t size; // Length in bytes of emitted code
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};
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EmitX64(BlockOfCode& code);
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virtual ~EmitX64();
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/// Looks up an emitted host block in the cache.
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boost::optional<BlockDescriptor> GetBasicBlock(IR::LocationDescriptor descriptor) const;
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/// Empties the entire cache.
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virtual void ClearCache();
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/// Invalidates a selection of basic blocks.
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void InvalidateBasicBlocks(const std::unordered_set<IR::LocationDescriptor>& locations);
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protected:
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// Microinstruction emitters
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#define OPCODE(name, type, ...) void Emit##name(EmitContext& ctx, IR::Inst* inst);
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#define A32OPC(...)
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#define A64OPC(...)
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#include "frontend/ir/opcodes.inc"
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#undef OPCODE
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#undef A32OPC
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#undef A64OPC
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// Helpers
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void EmitAddCycles(size_t cycles);
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Xbyak::Label EmitCond(IR::Cond cond);
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void EmitCondPrelude(const IR::Block& block);
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void PushRSBHelper(Xbyak::Reg64 loc_desc_reg, Xbyak::Reg64 index_reg, IR::LocationDescriptor target);
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// Terminal instruction emitters
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void EmitTerminal(IR::Terminal terminal, IR::LocationDescriptor initial_location);
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virtual void EmitTerminalImpl(IR::Term::Interpret terminal, IR::LocationDescriptor initial_location) = 0;
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virtual void EmitTerminalImpl(IR::Term::ReturnToDispatch terminal, IR::LocationDescriptor initial_location) = 0;
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virtual void EmitTerminalImpl(IR::Term::LinkBlock terminal, IR::LocationDescriptor initial_location) = 0;
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virtual void EmitTerminalImpl(IR::Term::LinkBlockFast terminal, IR::LocationDescriptor initial_location) = 0;
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virtual void EmitTerminalImpl(IR::Term::PopRSBHint terminal, IR::LocationDescriptor initial_location) = 0;
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virtual void EmitTerminalImpl(IR::Term::If terminal, IR::LocationDescriptor initial_location) = 0;
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virtual void EmitTerminalImpl(IR::Term::CheckBit terminal, IR::LocationDescriptor initial_location) = 0;
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virtual void EmitTerminalImpl(IR::Term::CheckHalt terminal, IR::LocationDescriptor initial_location) = 0;
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// Patching
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struct PatchInformation {
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std::vector<CodePtr> jg;
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std::vector<CodePtr> jmp;
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std::vector<CodePtr> mov_rcx;
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};
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void Patch(const IR::LocationDescriptor& target_desc, CodePtr target_code_ptr);
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void Unpatch(const IR::LocationDescriptor& target_desc);
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virtual void EmitPatchJg(const IR::LocationDescriptor& target_desc, CodePtr target_code_ptr = nullptr) = 0;
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virtual void EmitPatchJmp(const IR::LocationDescriptor& target_desc, CodePtr target_code_ptr = nullptr) = 0;
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virtual void EmitPatchMovRcx(CodePtr target_code_ptr = nullptr) = 0;
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// State
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BlockOfCode& code;
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std::unordered_map<IR::LocationDescriptor, BlockDescriptor> block_descriptors;
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std::unordered_map<IR::LocationDescriptor, PatchInformation> patch_information;
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};
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} // namespace Dynarmic::BackendX64
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