95 lines
2.8 KiB
C++
95 lines
2.8 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 <functional>
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#include <iosfwd>
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#include <tuple>
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#include "common/bit_util.h"
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#include "common/common_types.h"
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#include "frontend/A64/FPCR.h"
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#include "frontend/ir/location_descriptor.h"
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namespace Dynarmic {
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namespace A64 {
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/**
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* LocationDescriptor describes the location of a basic block.
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* The location is not solely based on the PC because other flags influence the way
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* instructions should be translated.
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*/
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class LocationDescriptor {
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public:
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static constexpr u64 PC_MASK = 0x00FF'FFFF'FFFF'FFFFull;
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static constexpr u32 FPCR_MASK = 0x07C0'0000;
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LocationDescriptor(u64 pc, FPCR fpcr) : pc(pc & PC_MASK), fpcr(fpcr.Value() & FPCR_MASK) {}
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explicit LocationDescriptor(const IR::LocationDescriptor& o)
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: pc(o.Value() & PC_MASK), fpcr((o.Value() >> 37) & FPCR_MASK) {}
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u64 PC() const { return Common::SignExtend<56>(pc); }
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A64::FPCR FPCR() const { return fpcr; }
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bool operator == (const LocationDescriptor& o) const {
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return std::tie(pc, fpcr) == std::tie(o.pc, o.fpcr);
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}
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bool operator != (const LocationDescriptor& o) const {
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return !operator==(o);
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}
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LocationDescriptor SetPC(u64 new_pc) const {
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return LocationDescriptor(new_pc, fpcr);
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}
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LocationDescriptor AdvancePC(int amount) const {
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return LocationDescriptor(static_cast<u64>(pc + amount), fpcr);
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}
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u64 UniqueHash() const {
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// This value MUST BE UNIQUE.
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// This calculation has to match up with EmitTerminalPopRSBHint
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u64 fpcr_u64 = static_cast<u64>(fpcr.Value()) << 37;
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return pc | fpcr_u64;
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}
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operator IR::LocationDescriptor() const {
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return IR::LocationDescriptor{UniqueHash()};
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}
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private:
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u64 pc; ///< Current program counter value.
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A64::FPCR fpcr; ///< Floating point control register.
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};
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/**
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* Provides a string representation of a LocationDescriptor.
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*
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* @param o Output stream
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* @param descriptor The descriptor to get a string representation of
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*/
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std::ostream& operator<<(std::ostream& o, const LocationDescriptor& descriptor);
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} // namespace A64
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} // namespace Dynarmic
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namespace std {
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template <>
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struct less<Dynarmic::A64::LocationDescriptor> {
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bool operator()(const Dynarmic::A64::LocationDescriptor& x, const Dynarmic::A64::LocationDescriptor& y) const {
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return x.UniqueHash() < y.UniqueHash();
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}
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};
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template <>
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struct hash<Dynarmic::A64::LocationDescriptor> {
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size_t operator()(const Dynarmic::A64::LocationDescriptor& x) const {
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return std::hash<u64>()(x.UniqueHash());
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}
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};
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} // namespace std
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