OpcodeDispatcher: eliminate branch in cmpxchg pair #3522
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alyssarosenzweig
commented
Mar 27, 2024
alyssarosenzweig
commented
In the old case: * if we take the branch, 1 instruction * if we don't take the branch, 3 instruction * branch predictor fun * 3 instructions of icache pressure In the new case: * unconditionally 2 instructions * no branch predictor dependence * 2 instructions of icache pressure This should not be non-neglibly worse, and it simplifies things for RA. Signed-off-by: Alyssa Rosenzweig <[email protected]>
Signed-off-by: Alyssa Rosenzweig <[email protected]>
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Sonicadvance1
approved these changes
Mar 28, 2024
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