diff options
| author | Sunil K Pandey <skpgkp2@gmail.com> | 2022-08-09 07:57:29 -0700 |
|---|---|---|
| committer | Sunil K Pandey <skpgkp2@gmail.com> | 2022-11-03 15:51:52 -0700 |
| commit | faaf733f49211439475e50f06716b303ee2644bf (patch) | |
| tree | 3dd19a3b1d40d31f72cb063a05ad86dc273555d8 /sysdeps/x86_64/multiarch/wcsrchr-evex512.S | |
| parent | 1f34a2328890aa192141f96449d25b77f666bf47 (diff) | |
| download | glibc-faaf733f49211439475e50f06716b303ee2644bf.tar.gz glibc-faaf733f49211439475e50f06716b303ee2644bf.tar.xz glibc-faaf733f49211439475e50f06716b303ee2644bf.zip | |
x86_64: Implement evex512 version of strrchr and wcsrchr
Changes from v1: Use vec api for register. Replace VPCMP with VPCMPEQ Restructure and remove 1 unconditional jump. Change page cross logic to use sall. This patch implements following evex512 version of string functions. evex512 version takes up to 30% less cycle as compared to evex, depending on length and alignment. - strrchr function using 512 bit vectors. - wcsrchr function using 512 bit vectors. Code size data: strrchr-evex.o 879 byte strrchr-evex512.o 601 byte (-32%) wcsrchr-evex.o 882 byte wcsrchr-evex512.o 572 byte (-35%) Placeholder function, not used by any processor at the moment. Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
Diffstat (limited to 'sysdeps/x86_64/multiarch/wcsrchr-evex512.S')
| -rw-r--r-- | sysdeps/x86_64/multiarch/wcsrchr-evex512.S | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/sysdeps/x86_64/multiarch/wcsrchr-evex512.S b/sysdeps/x86_64/multiarch/wcsrchr-evex512.S new file mode 100644 index 0000000000..f241f63716 --- /dev/null +++ b/sysdeps/x86_64/multiarch/wcsrchr-evex512.S @@ -0,0 +1,13 @@ +#ifndef WCSRCHR +# define WCSRCHR __wcsrchr_evex512 +#endif + +#define STRRCHR WCSRCHR +#define USE_AS_WCSRCHR 1 + +#define USE_WIDE_CHAR 1 + +#include "x86-evex512-vecs.h" +#include "reg-macros.h" + +#include "strrchr-evex512.S" |