Hi, Due to a bug in the BMI2 detection in mpn/x86_64/fat/fat.c (missing load of the correct CPUID register) the codepath with the BMI2 and ADX instructions (_coreihwl and _coreibwl suffix) is never being used in fat binaries. Fixing it gave me a large performance boost. See attached patch.
(Please reply also directly to me, I'm not subscribed to the list.) Best regards, Sven
libgmp-fat.patch
Description: Binary data
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