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>These days, Intel and AMD put fairly little effort into making x87 instructions fast, because code that cares about floating point performance use AVX instructions.

AFAIK x87 instructions were removed/deprecated in x86_64



AMD64 (x86_64) can still execute x87 instructions. Not much point, though, unless you need 80-bit precision.

SSE / AVX just performs so much better.


Not much point, though, unless you need 80-bit precision.

Precisely what it's good for.




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