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backend/A64: implement HaltReason

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fix Jz

backend/A64: Jz again
This commit is contained in:
SachinVin 2022-05-28 18:46:54 +05:30
parent 8bd79dc382
commit b525a3c20f
9 changed files with 109 additions and 37 deletions
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53
src/dynarmic/backend/A64/a32_emit_a64.cpp
View File

@ -1419,15 +1419,28 @@ void A32EmitA64::EmitTerminalImpl(IR::Term::LinkBlock terminal, IR::LocationDesc
code.ReturnFromRunCode();
return;
}
if (config.enable_cycle_counting) {
code.CMP(X26, ZR);
code.CMP(X26, ZR);
patch_information[terminal.next].jg.emplace_back(code.GetCodePtr());
if (auto next_bb = GetBasicBlock(terminal.next)) {
EmitPatchJg(terminal.next, next_bb->entrypoint);
patch_information[terminal.next].jg.emplace_back(code.GetCodePtr());
if (const auto next_bb = GetBasicBlock(terminal.next)) {
EmitPatchJg(terminal.next, next_bb->entrypoint);
} else {
EmitPatchJg(terminal.next);
}
} else {
EmitPatchJg(terminal.next);
code.LDR(INDEX_UNSIGNED, DecodeReg(code.ABI_SCRATCH1), X28, offsetof(A32JitState, halt_reason));
code.CMP(code.ABI_SCRATCH1, ZR);
patch_information[terminal.next].jz.emplace_back(code.GetCodePtr());
if (const auto next_bb = GetBasicBlock(terminal.next)) {
EmitPatchJz(terminal.next, next_bb->entrypoint);
} else {
EmitPatchJz(terminal.next);
}
}
FixupBranch dest = code.B();
code.SwitchToFarCode();
@ -1495,7 +1508,7 @@ void A32EmitA64::EmitTerminalImpl(IR::Term::CheckBit terminal, IR::LocationDescr
}
void A32EmitA64::EmitTerminalImpl(IR::Term::CheckHalt terminal, IR::LocationDescriptor initial_location, bool is_single_step) {
code.LDRB(INDEX_UNSIGNED, DecodeReg(code.ABI_SCRATCH1), X28, offsetof(A32JitState, halt_requested));
code.LDR(INDEX_UNSIGNED, DecodeReg(code.ABI_SCRATCH1), X28, offsetof(A32JitState, halt_reason));
// Conditional branch only gives +/- 1MB of branch distance
FixupBranch zero = code.CBZ(DecodeReg(code.ABI_SCRATCH1));
code.B(code.GetForceReturnFromRunCodeAddress());
@ -1529,6 +1542,32 @@ void A32EmitA64::EmitPatchJg(const IR::LocationDescriptor& target_desc, CodePtr
code.EnsurePatchLocationSize(patch_location, 24);
}
void A32EmitA64::EmitPatchJz(const IR::LocationDescriptor& target_desc, CodePtr target_code_ptr) {
const CodePtr patch_location = code.GetCodePtr();
auto long_branch_gt = [this](CodePtr ptr){
const s64 distance = reinterpret_cast<s64>(ptr) - reinterpret_cast<s64>(code.GetCodePtr());
if((distance >> 2) >= -0x40000 && (distance >> 2) <= 0x3FFFF) {
code.B(CC_EQ, ptr);
return;
}
FixupBranch cc_neq = code.B(CC_NEQ);
code.B(ptr);
code.SetJumpTarget(cc_neq);
};
if (target_code_ptr) {
long_branch_gt(target_code_ptr);
} else {
code.MOVI2R(DecodeReg(code.ABI_SCRATCH1), A32::LocationDescriptor{target_desc}.PC());
code.STR(INDEX_UNSIGNED, DecodeReg(code.ABI_SCRATCH1), X28, MJitStateReg(A32::Reg::PC));
long_branch_gt(code.GetReturnFromRunCodeAddress());
}
code.EnsurePatchLocationSize(patch_location, 24);
}
void A32EmitA64::EmitPatchJmp(const IR::LocationDescriptor& target_desc, CodePtr target_code_ptr) {
const CodePtr patch_location = code.GetCodePtr();
if (target_code_ptr) {

1
src/dynarmic/backend/A64/a32_emit_a64.h
View File

@ -131,6 +131,7 @@ protected:
// Patching
void Unpatch(const IR::LocationDescriptor& target_desc) override;
void EmitPatchJg(const IR::LocationDescriptor& target_desc, CodePtr target_code_ptr = nullptr) override;
void EmitPatchJz(const IR::LocationDescriptor& target_desc, CodePtr target_code_ptr = nullptr) override;
void EmitPatchJmp(const IR::LocationDescriptor& target_desc, CodePtr target_code_ptr = nullptr) override;
void EmitPatchMovX0(CodePtr target_code_ptr = nullptr) override;
};

36
src/dynarmic/backend/A64/a32_interface.cpp
View File

@ -60,7 +60,7 @@ struct Jit::Impl {
boost::icl::interval_set<u32> invalid_cache_ranges;
bool invalidate_entire_cache = false;
void Execute() {
HaltReason Execute() {
const CodePtr current_codeptr = [this]{
// RSB optimization
const u32 new_rsb_ptr = (jit_state.rsb_ptr - 1) & A32JitState::RSBPtrMask;
@ -72,11 +72,15 @@ struct Jit::Impl {
return GetCurrentBlock();
}();
block_of_code.RunCode(&jit_state, current_codeptr);
return block_of_code.RunCode(&jit_state, current_codeptr);
}
void Step() {
block_of_code.StepCode(&jit_state, GetCurrentSingleStep());
HaltReason Step() {
return block_of_code.StepCode(&jit_state, GetCurrentSingleStep());
}
void HaltExecution(HaltReason hr) {
Atomic::Or(&jit_state.halt_reason, static_cast<u32>(hr));
}
std::string Disassemble(const IR::LocationDescriptor& descriptor) {
@ -117,7 +121,7 @@ struct Jit::Impl {
void RequestCacheInvalidation() {
if (jit_interface->is_executing) {
jit_state.halt_requested = true;
HaltExecution(HaltReason::CacheInvalidation);
return;
}
@ -155,8 +159,8 @@ private:
PerformCacheInvalidation();
}
IR::Block ir_block = A32::Translate(A32::LocationDescriptor{descriptor}, [this](u32 vaddr) { return config.callbacks->MemoryReadCode(vaddr); }, {config.define_unpredictable_behaviour, config.hook_hint_instructions});
if (config.enable_optimizations) {
IR::Block ir_block = A32::Translate(A32::LocationDescriptor{descriptor}, config.callbacks, {config.arch_version, config.define_unpredictable_behaviour, config.hook_hint_instructions});
Optimization::A32GetSetElimination(ir_block);
Optimization::DeadCodeElimination(ir_block);
Optimization::A32ConstantMemoryReads(ir_block, config.callbacks);
@ -173,28 +177,28 @@ Jit::Jit(UserConfig config) : impl(std::make_unique<Impl>(this, std::move(config
Jit::~Jit() = default;
void Jit::Run() {
HaltReason Jit::Run() {
ASSERT(!is_executing);
is_executing = true;
SCOPE_EXIT { this->is_executing = false; };
impl->jit_state.halt_requested = false;
impl->Execute();
const HaltReason hr = impl->Execute();
impl->PerformCacheInvalidation();
return hr;
}
void Jit::Step() {
HaltReason Jit::Step() {
ASSERT(!is_executing);
is_executing = true;
SCOPE_EXIT { this->is_executing = false; };
impl->jit_state.halt_requested = true;
impl->Step();
const HaltReason hr = impl->Step();
impl->PerformCacheInvalidation();
return hr;
}
void Jit::ClearCache() {
@ -212,8 +216,8 @@ void Jit::Reset() {
impl->jit_state = {};
}
void Jit::HaltExecution() {
impl->jit_state.halt_requested = true;
void Jit::HaltExecution(HaltReason hr) {
impl->HaltExecution(hr);
}
std::array<u32, 16>& Jit::Regs() {

4
src/dynarmic/backend/A64/a32_jitstate.h
View File

@ -48,8 +48,8 @@ struct A32JitState {
u64 guest_fpsr = 0;
u64 save_host_FPCR = 0;
s64 cycles_to_run = 0;
s64 cycles_remaining = 0;
bool halt_requested = false;
u64 cycles_remaining = 0;
volatile u32 halt_reason = 0;
bool check_bit = false;
// Exclusive state

36
src/dynarmic/backend/A64/block_of_code.cpp
View File

@ -131,12 +131,12 @@ size_t BlockOfCode::SpaceRemaining() const {
return std::min(TOTAL_CODE_SIZE - far_code_offset, FAR_CODE_OFFSET - near_code_offset);
}
void BlockOfCode::RunCode(void* jit_state, CodePtr code_ptr) const {
run_code(jit_state, code_ptr);
HaltReason BlockOfCode::RunCode(void* jit_state, CodePtr code_ptr) const {
return run_code(jit_state, code_ptr);
}
void BlockOfCode::StepCode(void* jit_state, CodePtr code_ptr) const {
step_code(jit_state, code_ptr);
HaltReason BlockOfCode::StepCode(void* jit_state, CodePtr code_ptr) const {
return step_code(jit_state, code_ptr);
}
void BlockOfCode::ReturnFromRunCode(bool fpscr_already_exited) {
@ -155,6 +155,7 @@ void BlockOfCode::ForceReturnFromRunCode(bool fpscr_already_exited) {
void BlockOfCode::GenRunCode() {
const u8* loop, *enter_fpscr_then_loop;
std::vector<Arm64Gen::FixupBranch> return_to_caller_fpscr_already_exited;
AlignCode16();
run_code = reinterpret_cast<RunCodeFuncType>(GetWritableCodePtr());
@ -173,6 +174,9 @@ void BlockOfCode::GenRunCode() {
STR(Arm64Gen::INDEX_UNSIGNED, ABI_RETURN, Arm64Gen::X28, jsi.offsetof_cycles_to_run);
MOV(Arm64Gen::X26, ABI_RETURN);
LDR(Arm64Gen::INDEX_UNSIGNED, ABI_SCRATCH1, Arm64Gen::X28, jsi.offsetof_halt_reason);
return_to_caller_fpscr_already_exited.push_back(CBNZ(ABI_SCRATCH1));
SwitchFpscrOnEntry();
BR(Arm64Gen::X25);
@ -181,9 +185,14 @@ void BlockOfCode::GenRunCode() {
ABI_PushCalleeSaveRegistersAndAdjustStack(*this);
MOV(Arm64Gen::X28, ABI_PARAM1);
MOVI2R(Arm64Gen::X26, 1);
STR(Arm64Gen::INDEX_UNSIGNED, Arm64Gen::X26, Arm64Gen::X28, jsi.offsetof_cycles_to_run);
STR(Arm64Gen::INDEX_UNSIGNED, Arm64Gen::X26, Arm64Gen::X28, jsi.offsetof_cycles_to_run);
LDR(Arm64Gen::INDEX_UNSIGNED, DecodeReg(ABI_SCRATCH1), Arm64Gen::X28, jsi.offsetof_halt_reason);
return_to_caller_fpscr_already_exited.push_back(CBNZ(ABI_SCRATCH1));
ORRI2R(ABI_SCRATCH1, ABI_SCRATCH1, static_cast<u32>(HaltReason::Step));
STR(Arm64Gen::INDEX_UNSIGNED, DecodeReg(ABI_SCRATCH1), Arm64Gen::X28, jsi.offsetof_halt_reason);
SwitchFpscrOnEntry();
BR(ABI_PARAM2);
@ -192,24 +201,31 @@ void BlockOfCode::GenRunCode() {
SwitchFpscrOnEntry();
loop = GetCodePtr();
cb.LookupBlock->EmitCall(*this);
BR(ABI_RETURN);
BR(ABI_RETURN);
// Return from run code variants
const auto emit_return_from_run_code = [this, &loop, &enter_fpscr_then_loop](bool fpscr_already_exited, bool force_return){
const auto emit_return_from_run_code = [this, &loop, &enter_fpscr_then_loop](bool fpscr_already_exited, bool force_return) {
Arm64Gen::FixupBranch return_to_caller;
if (!force_return) {
LDR(Arm64Gen::INDEX_UNSIGNED, DecodeReg(ABI_SCRATCH1), Arm64Gen::X28, jsi.offsetof_halt_reason);
return_to_caller = CBNZ(ABI_SCRATCH1);
CMP(Arm64Gen::X26, Arm64Gen::ZR);
B(CC_GT, fpscr_already_exited ? enter_fpscr_then_loop : loop);
SetJumpTarget(return_to_caller);
}
if (!fpscr_already_exited) {
SwitchFpscrOnExit();
}
cb.AddTicks->EmitCall(*this, [this](RegList param) {
LDR(Arm64Gen::INDEX_UNSIGNED, param[0], Arm64Gen::X28, jsi.offsetof_cycles_to_run);
SUB(param[0], param[0], Arm64Gen::X26);
});
LDR(Arm64Gen::INDEX_UNSIGNED, DecodeReg(ABI_RETURN), Arm64Gen::X28, jsi.offsetof_halt_reason);
// TODO: lock a mutex
STR(Arm64Gen::INDEX_UNSIGNED, Arm64Gen::WZR, Arm64Gen::X28, jsi.offsetof_halt_reason);
ABI_PopCalleeSaveRegistersAndAdjustStack(*this);
RET();
};
@ -224,6 +240,8 @@ void BlockOfCode::GenRunCode() {
emit_return_from_run_code(false, true);
return_from_run_code[FPSCR_ALREADY_EXITED | FORCE_RETURN] = AlignCode16();
for (const auto& jump_target : return_to_caller_fpscr_already_exited)
SetJumpTarget(jump_target);
emit_return_from_run_code(true, true);
PerfMapRegister(run_code, GetCodePtr(), "dynarmic_dispatcher");

6
src/dynarmic/backend/A64/block_of_code.h
View File

@ -49,9 +49,9 @@ public:
size_t SpaceRemaining() const;
/// Runs emulated code from code_ptr.
void RunCode(void* jit_state, CodePtr code_ptr) const;
HaltReason RunCode(void* jit_state, CodePtr code_ptr) const;
/// Runs emulated code from code_ptr for a single cycle.
void StepCode(void* jit_state, CodePtr code_ptr) const;
HaltReason StepCode(void* jit_state, CodePtr code_ptr) const;
/// Code emitter: Returns to dispatcher
void ReturnFromRunCode(bool fpscr_already_exited = false);
/// Code emitter: Returns to dispatcher, forces return to host
@ -135,7 +135,7 @@ private:
CodePtr near_code_ptr;
CodePtr far_code_ptr;
using RunCodeFuncType = void(*)(void*, CodePtr);
using RunCodeFuncType = HaltReason (*)(void*, CodePtr);
RunCodeFuncType run_code = nullptr;
RunCodeFuncType step_code = nullptr;
static constexpr size_t FPSCR_ALREADY_EXITED = 1 << 0;

6
src/dynarmic/backend/A64/emit_a64.cpp
View File

@ -242,6 +242,12 @@ void EmitA64::Patch(const IR::LocationDescriptor& desc, CodePtr bb) {
code.FlushIcache();
}
for (CodePtr location : patch_info.jz) {
code.SetCodePtr(location);
EmitPatchJz(desc, bb);
code.FlushIcache();
}
for (CodePtr location : patch_info.jmp) {
code.SetCodePtr(location);
EmitPatchJmp(desc, bb);

2
src/dynarmic/backend/A64/emit_a64.h
View File

@ -107,12 +107,14 @@ protected:
// Patching
struct PatchInformation {
std::vector<CodePtr> jg;
std::vector<CodePtr> jz;
std::vector<CodePtr> jmp;
std::vector<CodePtr> mov_x0;
};
void Patch(const IR::LocationDescriptor& target_desc, CodePtr target_code_ptr);
virtual void Unpatch(const IR::LocationDescriptor& target_desc);
virtual void EmitPatchJg(const IR::LocationDescriptor& target_desc, CodePtr target_code_ptr = nullptr) = 0;
virtual void EmitPatchJz(const IR::LocationDescriptor& target_desc, CodePtr target_code_ptr = nullptr) = 0;
virtual void EmitPatchJmp(const IR::LocationDescriptor& target_desc, CodePtr target_code_ptr = nullptr) = 0;
virtual void EmitPatchMovX0(CodePtr target_code_ptr = nullptr) = 0;

2
src/dynarmic/backend/A64/jitstate_info.h
View File

@ -25,6 +25,7 @@ struct JitStateInfo {
, offsetof_cpsr_nzcv(offsetof(JitStateType, cpsr_nzcv))
, offsetof_fpsr_exc(offsetof(JitStateType, fpsr_exc))
, offsetof_fpsr_qc(offsetof(JitStateType, fpsr_qc))
, offsetof_halt_reason(offsetof(JitStateType, halt_reason))
{}
const size_t offsetof_cycles_remaining;
@ -39,6 +40,7 @@ struct JitStateInfo {
const size_t offsetof_cpsr_nzcv;
const size_t offsetof_fpsr_exc;
const size_t offsetof_fpsr_qc;
const size_t offsetof_halt_reason;
};
} // namespace Dynarmic::BackendA64