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1999-10-03  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/i386/i486/bits/string.h (__memrchr): New function.

	* sysdeps/i386/bits/string.h (__memrchr): Add cld to comply to
	conventions.

	* string/Versions: Export memrchr.
This commit is contained in:
Ulrich Drepper 1999-10-04 06:16:19 +00:00
parent 1d781d86c3
commit 22baad3c3d
3 changed files with 50 additions and 3 deletions
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9
ChangeLog
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@ -1,3 +1,12 @@
1999-10-03 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/i386/i486/bits/string.h (__memrchr): New function.
* sysdeps/i386/bits/string.h (__memrchr): Add cld to comply to
conventions.
* string/Versions: Export memrchr.
1999-10-04 Roland McGrath <roland@baalperazim.frob.com>
* misc/Versions (GLIBC_2.2): Add getloadavg.

8
sysdeps/i386/bits/string.h
View File

@ -300,7 +300,8 @@ memchr (__const void *__s, int __c, size_t __n)
"movl $1,%0\n"
"1:"
: "=D" (__res), "=&c" (__d0)
: "a" (__c), "0" (__s), "1" (__n));
: "a" (__c), "0" (__s), "1" (__n)
: "cc");
return __res - 1;
}
#endif
@ -319,9 +320,10 @@ __memrchr (__const void *__s, int __c, size_t __n)
"repne; scasb\n\t"
"je 1f\n\t"
"movl $1,%0\n"
"1:"
"1:\tcld"
: "=D" (__res), "=&c" (__d0)
: "a" (__c), "0" (__s), "1" (__n));
: "a" (__c), "0" (__s), "1" (__n)
: "cc");
return __res - 1;
}
#endif

36
sysdeps/i386/i486/bits/string.h
View File

@ -446,6 +446,42 @@ memchr (__const void *__s, int __c, size_t __n)
}
#endif
#define _HAVE_STRING_ARCH_memrchr 1
#ifndef _FORCE_INLINES
__STRING_INLINE void *
__memrchr (__const void *__s, int __c, size_t __n)
{
register unsigned long int __d0;
#ifdef __i686__
register unsigned long int __d1;
#endif
register void *__res;
if (__n == 0)
return NULL;
#ifdef __i686__
__asm__ __volatile__
("std\n\t"
"repne; scasb\n\t"
"cmovne %2,%0\n\t"
"cld"
: "=D" (__res), "=&c" (__d0), "=&r" (__d1)
: "a" (__c), "0" (__s), "1" (__n), "2" (1)
: "cc");
#else
__asm__ __volatile__
("std\n\t"
"repne; scasb\n\t"
"je 1f\n\t"
"movl $1,%0\n"
"1:\tcld"
: "=D" (__res), "=&c" (__d0)
: "a" (__c), "0" (__s), "1" (__n)
: "cc");
#endif
return __res - 1;
}
#endif
/* Return pointer to C in S. */
#define _HAVE_STRING_ARCH_rawmemchr 1
__STRING_INLINE void *__rawmemchr (const void *__s, int __c);