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s390: implement memset16, memset32 & memset64

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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>
This commit is contained in:
Heiko Carstens
2017-10-04 19:27:05 +02:00
committed by Martin Schwidefsky
parent 3bdf5679c9
commit 0b77d6701c
2 changed files with 66 additions and 0 deletions
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22
arch/s390/include/asm/string.h
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@@ -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)