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| author |   Heiko Carstens <heiko.carstens@de.ibm.com> | 2017-10-04 19:27:05 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2017-10-09 11:18:04 +0200 |
| commit | 0b77d6701cf8d4eb343a83fa8d7eca81a863bb7c (patch) | |
| tree | b3254583a855788629a4c50feacef807d966fbf0 /arch/s390/include/asm | |
| parent | Merge branch 'sthyi' into features (diff) | |
| download | linux-dev-0b77d6701cf8d4eb343a83fa8d7eca81a863bb7c.tar.xz linux-dev-0b77d6701cf8d4eb343a83fa8d7eca81a863bb7c.zip | |
s390: implement memset16, memset32 & memset64
Provide fast versions of the new memset variants. E.g. the generic
memset64 is ten times slower than the optimized version if used on a
whole page.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm')
| -rw-r--r-- | arch/s390/include/asm/string.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/s390/include/asm/string.h b/arch/s390/include/asm/string.h index 8fb43319693d..aa9c3a0f59ff 100644 --- a/arch/s390/include/asm/string.h +++ b/arch/s390/include/asm/string.h @@ -17,6 +17,9 @@ #define __HAVE_ARCH_MEMMOVE /* gcc builtin & arch function */ #define __HAVE_ARCH_MEMSCAN /* inline & arch function */ #define __HAVE_ARCH_MEMSET /* gcc builtin & arch function */ +#define __HAVE_ARCH_MEMSET16 /* arch function */ +#define __HAVE_ARCH_MEMSET32 /* arch function */ +#define __HAVE_ARCH_MEMSET64 /* arch function */ #define __HAVE_ARCH_STRCAT /* inline & arch function */ #define __HAVE_ARCH_STRCMP /* arch function */ #define __HAVE_ARCH_STRCPY /* inline & arch function */ @@ -49,6 +52,25 @@ extern char *strstr(const char *, const char *); #undef __HAVE_ARCH_STRSEP #undef __HAVE_ARCH_STRSPN +void *__memset16(uint16_t *s, uint16_t v, size_t count); +void *__memset32(uint32_t *s, uint32_t v, size_t count); +void *__memset64(uint64_t *s, uint64_t v, size_t count); + +static inline void *memset16(uint16_t *s, uint16_t v, size_t count) +{ + return __memset16(s, v, count * sizeof(v)); +} + +static inline void *memset32(uint32_t *s, uint32_t v, size_t count) +{ + return __memset32(s, v, count * sizeof(v)); +} + +static inline void *memset64(uint64_t *s, uint64_t v, size_t count) +{ + return __memset64(s, v, count * sizeof(v)); +} + #if !defined(IN_ARCH_STRING_C) && (!defined(CONFIG_FORTIFY_SOURCE) || defined(__NO_FORTIFY)) static inline void *memchr(const void * s, int c, size_t n) |