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This commit is contained in:
MerryMage 2016-07-22 23:55:00 +01:00
parent 5fbfc6c155
commit 51448aa06d
16 changed files with 1066 additions and 955 deletions
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30
src/backend_x64/reg_alloc.h
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@ -17,11 +17,14 @@ namespace Dynarmic {
namespace BackendX64 {
enum class HostLoc {
RAX, RBX, RCX, RDX, RSI, RDI, RBP, RSP, R8, R9, R10, R11, R12, R13, R14,
// Ordering of the registers is intentional. See also: HostLocToX64.
RAX, RCX, RDX, RBX, RSP, RBP, RSI, RDI, R8, R9, R10, R11, R12, R13, R14,
CF, PF, AF, ZF, SF, OF,
FirstSpill,
};
constexpr size_t HostLocCount = static_cast<size_t>(HostLoc::FirstSpill) + SpillCount;
enum class HostLocState {
Idle, Def, Use, Scratch
};
@ -66,22 +69,26 @@ public:
RegAlloc(Gen::XEmitter* code) : code(code) {}
/// Late-def
Gen::X64Reg DefRegister(IR::Value* def_value, std::initializer_list<HostLoc> desired_locations = hostloc_any_register);
Gen::X64Reg DefRegister(IR::Inst* def_inst, std::initializer_list<HostLoc> desired_locations = hostloc_any_register);
/// Early-use, Late-def
Gen::X64Reg UseDefRegister(IR::Value* use_value, IR::Value* def_value, std::initializer_list<HostLoc> desired_locations = hostloc_any_register);
Gen::X64Reg UseDefRegister(IR::Value use_value, IR::Inst* def_inst, std::initializer_list<HostLoc> desired_locations = hostloc_any_register);
Gen::X64Reg UseDefRegister(IR::Inst* use_inst, IR::Inst* def_inst, std::initializer_list<HostLoc> desired_locations = hostloc_any_register);
/// Early-use
Gen::X64Reg UseRegister(IR::Value* use_value, std::initializer_list<HostLoc> desired_locations = hostloc_any_register);
Gen::X64Reg UseRegister(IR::Value use_value, std::initializer_list<HostLoc> desired_locations = hostloc_any_register);
Gen::X64Reg UseRegister(IR::Inst* use_inst, std::initializer_list<HostLoc> desired_locations = hostloc_any_register);
/// Early-use, Destroyed
Gen::X64Reg UseScratchRegister(IR::Value* use_value, std::initializer_list<HostLoc> desired_locations = hostloc_any_register);
Gen::X64Reg UseScratchRegister(IR::Value use_value, std::initializer_list<HostLoc> desired_locations = hostloc_any_register);
Gen::X64Reg UseScratchRegister(IR::Inst* use_inst, std::initializer_list<HostLoc> desired_locations = hostloc_any_register);
/// Early-def, Late-use, single-use
Gen::X64Reg ScratchRegister(std::initializer_list<HostLoc> desired_locations = hostloc_any_register);
Gen::X64Reg LoadImmediateIntoRegister(IR::Value imm, Gen::X64Reg reg);
/// Late-def for result register, Early-use for all arguments, Each value is placed into registers according to host ABI.
void HostCall(IR::Value* result_def = nullptr, IR::Value* arg0_use = nullptr, IR::Value* arg1_use = nullptr, IR::Value* arg2_use = nullptr, IR::Value* arg3_use = nullptr);
void HostCall(IR::Inst* result_def = nullptr, IR::Value arg0_use = {}, IR::Value arg1_use = {}, IR::Value arg2_use = {}, IR::Value arg3_use = {});
// TODO: Values in host flags
void DecrementRemainingUses(IR::Value* value);
void DecrementRemainingUses(IR::Inst* value);
void EndOfAllocScope();
@ -91,7 +98,7 @@ public:
private:
HostLoc SelectARegister(std::initializer_list<HostLoc> desired_locations) const;
std::vector<HostLoc> ValueLocations(IR::Value* value) const;
std::vector<HostLoc> ValueLocations(IR::Inst* value) const;
bool IsRegisterOccupied(HostLoc loc) const;
bool IsRegisterAllocated(HostLoc loc) const;
@ -100,10 +107,9 @@ private:
Gen::XEmitter* code = nullptr;
using mapping_map_t = std::map<HostLoc, IR::Value*>;
mapping_map_t hostloc_to_value;
std::map<HostLoc, HostLocState> hostloc_state;
std::map<IR::Value*, size_t> remaining_uses;
using mapping_map_t = std::array<IR::Inst*, HostLocCount>;
mapping_map_t hostloc_to_inst;
std::array<HostLocState, HostLocCount> hostloc_state;
};
} // namespace BackendX64