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[dynarmic] remove bloated LUT usage that makes giant functions for no good reason #2801

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Shinmegumi merged 2 commits from dynarmic-lut-obliterate into master 2025-10-22 12:23:16 +02:00
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Lizzie commented 2025-10-20 22:41:41 +02:00
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Long story short, each of these LUT generates a function that is only ran once, spam the entire code with bunch of little "specialized templates" (remember, N * M * L) and basically bloat codesize for no good reason
Additionally it tries to outsmart the compiler which it's not always a good idea - herein I replace most (except 1) of those "helper" LUTs with something the compiler can actually work satisfiably

Happy reminder of the sheer amount of functions spammed:
mcl::list thing generates a number from 0 to 63 for (fsize 64), add the 0-31 for fsize 32, 0-15 for fsize 16 and you got around... 64+32+16 = 112 functions for a single parameter
Now include in the equation rounding_mode, which is about, what, 6? so 112*6 = 672

Yeah

Signed-off-by: lizzie lizzie@eden-emu.dev

Long story short, each of these LUT generates a function that is only ran once, spam the entire code with bunch of little "specialized templates" (remember, N * M * L) and basically bloat codesize for no good reason Additionally it tries to outsmart the compiler which it's not always a good idea - herein I replace most (except 1) of those "helper" LUTs with something the compiler can actually work satisfiably Happy reminder of the sheer amount of functions spammed: mcl::list thing generates a number from 0 to 63 for (fsize 64), add the 0-31 for fsize 32, 0-15 for fsize 16 and you got around... 64+32+16 = 112 functions for a single parameter Now include in the equation rounding_mode, which is about, what, 6? so 112*6 = 672 Yeah Signed-off-by: lizzie <lizzie@eden-emu.dev>
[dynarmic] remove bloated LUT usage that makes giant functions for no good reason
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Signed-off-by: lizzie <lizzie@eden-emu.dev>
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2025-10-21 20:32:19 +02:00 Compare
crueter approved these changes 2025-10-22 04:34:11 +02:00
Shinmegumi approved these changes 2025-10-22 12:16:17 +02:00
Shinmegumi deleted branch dynarmic-lut-obliterate 2025-10-22 12:23:17 +02:00
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