OpcodeDispatcher: Implements a few more pshufd masks #4368
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Saw these while scanning around. Funnily it makes it look like libnss is worse off because there are multiple instructions using the same table lookup to swizzle. So one instruction turns in to two. We don't have a way to choose one path or the other, so it's usually better to go the route that the instruction in a vacuum is improved, so on average it is also improved.
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lioncash
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Feb 19, 2025
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Saw these while scanning around. Funnily it makes it look like libnss is
worse off because there are multiple instructions using the same table
lookup to swizzle. So one instruction turns in to two.
We don't have a way to choose one path or the other, so it's usually
better to go the route that the instruction in a vacuum is improved, so
on average it is also improved.