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x86_64: Add avx2 optimized __memcmpeq in memcmpeq-avx2.S
authorNoah Goldstein <goldstein.w.n@gmail.com>
Thu, 30 Sep 2021 20:37:09 +0000 (15:37 -0500)
committerNoah Goldstein <goldstein.w.n@gmail.com>
Wed, 27 Oct 2021 18:03:46 +0000 (13:03 -0500)
commitb4ed69ba16ad5f5cfee2009ed86f10c06dce74e0
treee3161d753ea51483ba7ccdf73e56bfe7d6ff3f07tree | snapshot
parentfa7f63d8d6a081d59dadcb9986efaafb8093735dcommit | diff
x86_64: Add avx2 optimized __memcmpeq in memcmpeq-avx2.S

No bug. This commit adds new optimized __memcmpeq implementation for
avx2.

The primary optimizations are:

1) skipping the logic to find the difference of the first mismatched
byte.

2) not updating src/dst addresses as the non-equals logic does not
need to be reused by different areas.
sysdeps/x86_64/multiarch/ifunc-impl-list.c diff | blob | history
sysdeps/x86_64/multiarch/ifunc-memcmpeq.h diff | blob | history
sysdeps/x86_64/multiarch/memcmpeq-avx2-rtm.S diff | blob | history
sysdeps/x86_64/multiarch/memcmpeq-avx2.S diff | blob | history
Domain: System / Toolchain;