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Merge pull request #2350 from Sonicadvance1/optimize_dispatcher_slightly

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Arm64: Merge two loads in to an LDP
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Mai authored and GitHub committed 2023-01-23 08:35:13 +00:00
2 parents f8d56a8170 7bf1742434
commit a28039f7cd
1 file changed
+6 -4
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External/FEXCore/Source/Interface/Core/Dispatcher/Arm64Dispatcher.cpp
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+6 -4
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@@ -155,14 +155,16 @@ void Arm64Dispatcher::EmitDispatcher() {
// Shift the offset by the size of the block cache entry
add(ARMEmitter::XReg::x0, ARMEmitter::XReg::x0, ARMEmitter::XReg::x1, ARMEmitter::ShiftType::LSL, (int)log2(sizeof(FEXCore::LookupCache::LookupCacheEntry)));
// Load the guest address first to ensure it maps to the address we are currently at
// The the full LookupCacheEntry with a single LDP.
// Check the guest address first to ensure it maps to the address we are currently at.
// This fixes aliasing problems
ldr(ARMEmitter::XReg::x1, ARMEmitter::Reg::r0, offsetof(FEXCore::LookupCache::LookupCacheEntry, GuestCode));
ldp<ARMEmitter::IndexType::OFFSET>(ARMEmitter::XReg::x3, ARMEmitter::XReg::x1, ARMEmitter::Reg::r0, 0);
// If the guest address doesn't match, Compile the block.
cmp(ARMEmitter::XReg::x1, RipReg);
b(ARMEmitter::Condition::CC_NE, &NoBlock);
// Now load the actual host block to execute if we can
ldr(ARMEmitter::XReg::x3, ARMEmitter::Reg::r0, offsetof(FEXCore::LookupCache::LookupCacheEntry, HostCode));
// Check the host address to see if it matches, else compile the block.
cbz(ARMEmitter::Size::i64Bit, ARMEmitter::Reg::r3, &NoBlock);
// If we've made it here then we have a real compiled block