glibc/sysdeps/x86_64/multiarch/wcslen-sse4_1.S

#ifndef WCSLEN
# define WCSLEN	__wcslen_sse4_1
#endif

#define AS_WCSLEN	1
#define STRLEN	WCSLEN
#define SECTION(p)		p##.sse4.1

#include "strlen-sse2.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_sse4_1`
			`#endif`

			`#define AS_WCSLEN 1`
			`#define STRLEN WCSLEN`
			`#define SECTION(p) p##.sse4.1`
x86-64: Add wcslen optimize for sse4.1 No bug. This comment adds the ifunc / build infrastructure necessary for wcslen to prefer the sse4.1 implementation in strlen-vec.S. test-wcslen.c is passing. Signed-off-by: Noah Goldstein <goldstein.w.n@gmail.com> Reviewed-by: H.J. Lu <hjl.tools@gmail.com> 2021-06-23 05:19:34 +00:00
x86: Move strlen SSE2 implementation to multiarch/strlen-sse2.S This commit doesn't affect libc.so.6, its just housekeeping to prepare for adding explicit ISA level support. Tested build on x86_64 and x86_32 with/without multiarch. 2022-07-12 19:29:01 +00:00			`#include "strlen-sse2.S"`