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

[H.J. Lu]

On Mon, Mar 28, 2022 at 1:10 AM Mayshao-oc <Mayshao-oc@zhaoxin.com> wrote:
>
> 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.

How does the SSSE3 version compare against the SSE2 version?

> It is strongly recommended to keep the SSSE3 version.
>


-- 
H.J.