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

#ifndef STPNCPY
# define STPNCPY	__stpncpy_evex
#endif

#define USE_AS_STPCPY
#define USE_AS_STRNCPY
#define STRCPY	STPNCPY
#include "strcpy-evex.S"
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. 2022-07-13 23:33:01 +00:00			`#ifndef STPNCPY`
			`# define STPNCPY __stpncpy_evex`
			`#endif`

x86-64: Add strcpy family functions with 256-bit EVEX Update ifunc-strcpy.h to select the function optimized with 256-bit EVEX instructions using YMM16-YMM31 registers to avoid RTM abort with usable AVX512VL and AVX512BW since VZEROUPPER isn't needed at function exit. 2021-03-05 14:36:50 +00:00			`#define USE_AS_STPCPY`
			`#define USE_AS_STRNCPY`
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. 2022-07-13 23:33:01 +00:00			`#define STRCPY STPNCPY`
x86-64: Add strcpy family functions with 256-bit EVEX Update ifunc-strcpy.h to select the function optimized with 256-bit EVEX instructions using YMM16-YMM31 registers to avoid RTM abort with usable AVX512VL and AVX512BW since VZEROUPPER isn't needed at function exit. 2021-03-05 14:36:50 +00:00			`#include "strcpy-evex.S"`