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Place all XMM constants in memory so we can avoid clobbering rax.

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This commit is contained in:
Ben Vanik
2015-06-15 18:47:53 -07:00
parent 329a03e7c4
commit 0ffd8bbedd
6 changed files with 63 additions and 10 deletions
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16
src/xenia/cpu/backend/x64/x64_emitter.cc
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@@ -583,7 +583,7 @@ void X64Emitter::MovMem64(const RegExp& addr, uint64_t v) {
}
}
Address X64Emitter::GetXmmConstPtr(XmmConst id) {
uint32_t X64Emitter::PlaceData(Memory* memory) {
static const vec128_t xmm_consts[] = {
/* XMMZero */ vec128f(0.0f),
/* XMMOne */ vec128f(1.0f),
@@ -659,12 +659,14 @@ Address X64Emitter::GetXmmConstPtr(XmmConst id) {
/* XMMShortMinPS */ vec128f(SHRT_MIN),
/* XMMShortMaxPS */ vec128f(SHRT_MAX),
};
// TODO(benvanik): cache base pointer somewhere? stack? It'd be nice to
// prevent this move.
// TODO(benvanik): move to predictable location in PPCContext? could then
// just do rcx relative addression with no rax overwriting.
mov(rax, (uint64_t)&xmm_consts[id]);
return ptr[rax];
uint32_t ptr = memory->SystemHeapAlloc(sizeof(xmm_consts));
std::memcpy(memory->TranslateVirtual(ptr), xmm_consts, sizeof(xmm_consts));
return ptr;
}
Address X64Emitter::GetXmmConstPtr(XmmConst id) {
// Load through fixed constant table setup by PlaceData.
return ptr[rdx + backend_->emitter_data() + sizeof(vec128_t) * id];
}
void X64Emitter::LoadConstantXmm(Xbyak::Xmm dest, const vec128_t& v) {