VU: Expand IBit hack to work for immediates on several instructions #11117
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kamfretoz
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Apr 21, 2024
stenzek
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Apr 23, 2024
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Returning nullopt in Assembly changes LGTM, untested. |
JordanTheToaster
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kamfretoz
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Done :) |
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Mrlinkwii
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Description of Changes
Expand the IBit hack to several commands using immediates, to help reduce recompilation on games which modify these values a lot.
Rationale behind Changes
Games like Shellshock - Nam '67 and Killzone modify their VU programs a lot, changing immediate values and nothing else in several cases, This expands the IBit hack to try and ignore these differences and load the values from RAM instead of compiling new program.
Suggested Testing Steps
Test Shellshock - Nam '67, Killzone, Scarface and Crash Tag Team racing. If you know any other games that recompile constantly, try enabling the IBit gamefix and see if that helps.
Reduces VU compilation in Killzone by about half
Reduces VU compilation in Shellshock - Nam '67 by roughly 10% (reduces hitching by a bit)