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[AArch64] Implement a way to call lambdas in the emitter

This commit is contained in:
Ryan Houdek 2015-01-29 01:49:25 -06:00
parent aa5ab45104
commit 8c53b88cc3
1 changed files with 23 additions and 0 deletions
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23
Source/Core/Common/Arm64Emitter.h
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@ -597,6 +597,29 @@ public:
// ABI related
void ABI_PushRegisters(BitSet32 registers);
void ABI_PopRegisters(BitSet32 registers, BitSet32 ignore_mask = BitSet32(0));
// Utility to generate a call to a std::function object.
//
// Unfortunately, calling operator() directly is undefined behavior in C++
// (this method might be a thunk in the case of multi-inheritance) so we
// have to go through a trampoline function.
template <typename T, typename... Args>
static void CallLambdaTrampoline(const std::function<T(Args...)>* f,
Args... args)
{
(*f)(args...);
}
// This function expects you to have set up the state.
// Overwrites X0 and X30
template <typename T, typename... Args>
ARM64Reg ABI_SetupLambda(const std::function<T(Args...)>* f)
{
auto trampoline = &ARM64XEmitter::CallLambdaTrampoline<T, Args...>;
MOVI2R(X30, (u64)trampoline);
MOVI2R(X0, (u64)const_cast<void*>((const void*)f));
return X30;
}
};
class ARM64FloatEmitter