diff options
| -rw-r--r-- | arch/x86/include/asm/string_32.h | 84 |
1 files changed, 0 insertions, 84 deletions
diff --git a/arch/x86/include/asm/string_32.h b/arch/x86/include/asm/string_32.h index 2fd165f1cffa..f74362b05619 100644 --- a/arch/x86/include/asm/string_32.h +++ b/arch/x86/include/asm/string_32.h @@ -209,29 +209,6 @@ static inline void *__memset_generic(void *s, char c, size_t count) /* we might want to write optimized versions of these later */ #define __constant_count_memset(s, c, count) __memset_generic((s), (c), (count)) -/* - * memset(x, 0, y) is a reasonably common thing to do, so we want to fill - * things 32 bits at a time even when we don't know the size of the - * area at compile-time.. - */ -static __always_inline -void *__constant_c_memset(void *s, unsigned long c, size_t count) -{ - int d0, d1; - asm volatile("rep ; stosl\n\t" - "testb $2,%b3\n\t" - "je 1f\n\t" - "stosw\n" - "1:\ttestb $1,%b3\n\t" - "je 2f\n\t" - "stosb\n" - "2:" - : "=&c" (d0), "=&D" (d1) - : "a" (c), "q" (count), "0" (count/4), "1" ((long)s) - : "memory"); - return s; -} - /* Added by Gertjan van Wingerde to make minix and sysv module work */ #define __HAVE_ARCH_STRNLEN extern size_t strnlen(const char *s, size_t count); @@ -240,67 +217,6 @@ extern size_t strnlen(const char *s, size_t count); #define __HAVE_ARCH_STRSTR extern char *strstr(const char *cs, const char *ct); -/* - * This looks horribly ugly, but the compiler can optimize it totally, - * as we by now know that both pattern and count is constant.. - */ -static __always_inline -void *__constant_c_and_count_memset(void *s, unsigned long pattern, - size_t count) -{ - switch (count) { - case 0: - return s; - case 1: - *(unsigned char *)s = pattern & 0xff; - return s; - case 2: - *(unsigned short *)s = pattern & 0xffff; - return s; - case 3: - *(unsigned short *)s = pattern & 0xffff; - *((unsigned char *)s + 2) = pattern & 0xff; - return s; - case 4: - *(unsigned long *)s = pattern; - return s; - } - -#define COMMON(x) \ - asm volatile("rep ; stosl" \ - x \ - : "=&c" (d0), "=&D" (d1) \ - : "a" (eax), "0" (count/4), "1" ((long)s) \ - : "memory") - - { - int d0, d1; - unsigned long eax = pattern; - - switch (count % 4) { - case 0: - COMMON(""); - return s; - case 1: - COMMON("\n\tstosb"); - return s; - case 2: - COMMON("\n\tstosw"); - return s; - default: - COMMON("\n\tstosw\n\tstosb"); - return s; - } - } - -#undef COMMON -} - -#define __constant_c_x_memset(s, c, count) \ - (__builtin_constant_p(count) \ - ? __constant_c_and_count_memset((s), (c), (count)) \ - : __constant_c_memset((s), (c), (count))) - #define __memset(s, c, count) \ (__builtin_constant_p(count) \ ? __constant_count_memset((s), (c), (count)) \ |