| commit | 192979ee351315b84ff4277d0985f26243717cd7 | |
| author | Noah Goldstein <goldstein.w.n@gmail.com> | |
| Wed, 13 Jul 2022 23:33:00 +0000 (13 16:33 -0700) | ||
| committer | Noah Goldstein <goldstein.w.n@gmail.com> | |
| Sat, 16 Jul 2022 10:07:59 +0000 (16 03:07 -0700) | ||
| tree | a62f2737cc82add1047d89ef9e89984849a6de8d | treesnapshot (tar.gz zip) |
| parent | ceabdcd130ca7043b0fcf2676183d79431d10493 | commitdiff |
x86: Add support to build wcscpy with explicit ISA level
1. Add ISA level build guards to different implementations.
- wcscpy-ssse3.S is used as ISA level 2/3/4.
- wcscpy-generic.c is only used at ISA level 1 and will
only build if compiled with ISA level == 1. Otherwise
there is no reason to include it as we will always use
wcscpy-ssse3.S
2. Refactor the ifunc selector and ifunc implementation list to use
the ISA level aware wrapper macros that allow functions below the
compiled ISA level (with a guranteed replacement) to be skipped.
Tested with and without multiarch on x86_64 for ISA levels:
{generic, x86-64-v2, x86-64-v3, x86-64-v4}
And m32 with and without multiarch.
1. Add ISA level build guards to different implementations.
- wcscpy-ssse3.S is used as ISA level 2/3/4.
- wcscpy-generic.c is only used at ISA level 1 and will
only build if compiled with ISA level == 1. Otherwise
there is no reason to include it as we will always use
wcscpy-ssse3.S
2. Refactor the ifunc selector and ifunc implementation list to use
the ISA level aware wrapper macros that allow functions below the
compiled ISA level (with a guranteed replacement) to be skipped.
Tested with and without multiarch on x86_64 for ISA levels:
{generic, x86-64-v2, x86-64-v3, x86-64-v4}
And m32 with and without multiarch.