Smaller ComputeMemoryAddress/Offset sequence
Replace a movzx after setae in both ComputeMemoryAddressOffset and ComputeMemoryAddress with a xor_ of eax prior to the cmp. This reduces the length in bytes of both sequences by 1, and should be a moderate ICache usage reduction thanks to the frequency of these sequences.
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@ -52,9 +52,9 @@ RegExp ComputeMemoryAddressOffset(X64Emitter& e, const T& guest,
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if (xe::memory::allocation_granularity() > 0x1000) {
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// Emulate the 4 KB physical address offset in 0xE0000000+ when can't do
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// it via memory mapping.
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e.xor_(e.eax, e.eax);
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e.cmp(guest.reg().cvt32(), 0xE0000000 - offset_const);
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e.setae(e.al);
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e.movzx(e.eax, e.al);
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e.shl(e.eax, 12);
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e.add(e.eax, guest.reg().cvt32());
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} else {
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@ -89,9 +89,9 @@ RegExp ComputeMemoryAddress(X64Emitter& e, const T& guest) {
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if (xe::memory::allocation_granularity() > 0x1000) {
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// Emulate the 4 KB physical address offset in 0xE0000000+ when can't do
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// it via memory mapping.
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e.xor_(e.eax, e.eax);
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e.cmp(guest.reg().cvt32(), 0xE0000000);
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e.setae(e.al);
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e.movzx(e.eax, e.al);
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e.shl(e.eax, 12);
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e.add(e.eax, guest.reg().cvt32());
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} else {
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