glibc/sysdeps/x86_64/multiarch/wcslen-evex.S

#ifndef WCSLEN
# define WCSLEN	__wcslen_evex
#endif

#define STRLEN WCSLEN
#define USE_AS_WCSLEN 1

#include "strlen-evex.S"
x86: Add support to build strcmp/strlen/strchr 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 strcmp-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 (strcmp-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. 2022-07-13 23:32:59 +00:00			`#ifndef WCSLEN`
			`# define WCSLEN __wcslen_evex`
			`#endif`

			`#define STRLEN WCSLEN`
x86-64: Add ifunc-avx2.h functions with 256-bit EVEX Update ifunc-avx2.h, strchr.c, strcmp.c, strncmp.c and wcsnlen.c to select the function optimized with 256-bit EVEX instructions using YMM16-YMM31 registers to avoid RTM abort with usable AVX512VL, AVX512BW and BMI2 since VZEROUPPER isn't needed at function exit. For strcmp/strncmp, prefer AVX2 strcmp/strncmp if Prefer_AVX2_STRCMP is set. 2021-03-05 14:24:52 +00:00			`#define USE_AS_WCSLEN 1`

			`#include "strlen-evex.S"`