From 49889fb256a7f9b894b2d16fea23de1ac25b65e2 Mon Sep 17 00:00:00 2001 From: Noah Goldstein Date: Wed, 13 Jul 2022 16:33:01 -0700 Subject: x86: Add support to build st{p|r}{n}{cpy|cat} with explicit ISA level 1. Add default ISA level selection in non-multiarch/rtld implementations. 2. Add ISA level build guards to different implementations. - I.e strcpy-avx2.S which is ISA level 3 will only build if compiled ISA level <= 3. Otherwise there is no reason to include it as we will always use one of the ISA level 4 implementations (strcpy-evex.S). 3. 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. --- sysdeps/x86_64/multiarch/strncpy-evex.S | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'sysdeps/x86_64/multiarch/strncpy-evex.S') diff --git a/sysdeps/x86_64/multiarch/strncpy-evex.S b/sysdeps/x86_64/multiarch/strncpy-evex.S index 40e391f0da..1b3426d511 100644 --- a/sysdeps/x86_64/multiarch/strncpy-evex.S +++ b/sysdeps/x86_64/multiarch/strncpy-evex.S @@ -1,3 +1,7 @@ +#ifndef STRNCPY +# define STRNCPY __strncpy_evex +#endif + #define USE_AS_STRNCPY -#define STRCPY __strncpy_evex +#define STRCPY STRNCPY #include "strcpy-evex.S" -- cgit 1.4.1