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Commit 1fd8c163 authored by H.J. Lu's avatar H.J. Lu
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x86-64: Add ifunc-avx2.h functions with 256-bit EVEX 

Update ifunc-avx2.h, strchr.c, strcmp.c, strncmp.c and wcsnlen.c to
select the function optimized with 256-bit EVEX instructions using
YMM16-YMM31 registers to avoid RTM abort with usable AVX512VL, AVX512BW
and BMI2 since VZEROUPPER isn't needed at function exit.

For strcmp/strncmp, prefer AVX2 strcmp/strncmp if Prefer_AVX2_STRCMP
is set.
parent 1da50d4b
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