[PATCH v1 3/6] x86: Remove mem{move|cpy}-ssse3

[Mayshao-oc]

On Fri, Mar 25, 2022 at 6:36 PM Noah Goldstein <goldstein.w.n@gmail.com> wrote:

> With SSE2, SSE4.1, AVX2, and EVEX versions very few targets prefer
> SSSE3. As a result its no longer with the code size cost.
> ---
> sysdeps/x86_64/multiarch/Makefile          |    2 -
> sysdeps/x86_64/multiarch/ifunc-impl-list.c |   15 -
> sysdeps/x86_64/multiarch/ifunc-memmove.h   |   18 +-
> sysdeps/x86_64/multiarch/memcpy-ssse3.S    | 3151 --------------------
> sysdeps/x86_64/multiarch/memmove-ssse3.S   |    4 -
> 5 files changed, 7 insertions(+), 3183 deletions(-)
> delete mode 100644 sysdeps/x86_64/multiarch/memcpy-ssse3.S
> delete mode 100644 sysdeps/x86_64/multiarch/memmove-ssse3.S


On some platforms, such as Zhaoxin, the memcpy performance of SSSE3
is better than that of AVX2, and the current computer system has sufficient
disk capacity and memory capacity.

It is strongly recommended to keep the SSSE3 version.

Best Regards,
May Shao