Jit: Optimize dcbt loop
#13932
Jit: Optimize dcbt loop
#13932
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SuperSamus
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Separates the `dcbx` loop optimization to a function, in order to reuse it for `dcbt`. This way, `dcbt` loops will do absolutely nothing more efficiently.
SuperSamus
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Code review LGTM, but JitArm64 should also be tested before this can be merged. Do you know if this type of loop is used by only certain games, or most games in general? |
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Like for #13929, it is used by the SDK function I tested about 20 other games, I only found Pro Evolution Soccer 2008 to also spam this function to a significant degree (and with significant, I mean that the entire function spends 0.65% of JIT time on the current master). I also found Dragon Ball Z: Budokai Tenkaichi 3, but it calls the function only once per frame, so it barely matters. In conclusion, the number of games that get some tangible improvement with this (and #13929) is likely very small. |
While the performance improvement is very small, the commit is simple as well (and IMO, separating part of
dcbxinto a separate function makes it less daunting to read).Tested only on x86.