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tile: optimize strnlen using SIMD instructions

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Using strlen as a model, add length checking to create strnlen.

Signed-off-by: Ken Steele <ken@tilera.com>
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
This commit is contained in:
Ken Steele
2013-08-01 15:55:07 -04:00
committed by Chris Metcalf
parent c53c70a90f
commit 5916700c76
4 changed files with 98 additions and 1 deletions
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arch/tile/include/asm/string.h
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@@ -21,8 +21,10 @@
#define __HAVE_ARCH_MEMMOVE
#define __HAVE_ARCH_STRCHR
#define __HAVE_ARCH_STRLEN
#define __HAVE_ARCH_STRNLEN
extern __kernel_size_t strlen(const char *);
extern __kernel_size_t strnlen(const char *, __kernel_size_t);
extern char *strchr(const char *s, int c);
extern void *memchr(const void *s, int c, size_t n);
extern void *memset(void *, int, __kernel_size_t);