mirror/glibc
2
0
Fork 0
mirror of git://sourceware.org/git/glibc.git synced 2025-01-18 12:16:13 +08:00
Code Issues Packages Projects Releases Wiki Activity

(__strcspn_cg): Use only memory as clobber to reduce register pressure.

Browse Source 
(__strpbrk_cg): Likewise. 
(__mempcpy_by4): Likewise. 
(__strstr_cg): Likewise. 
Add prototype for __memrchr.
This commit is contained in:
Andreas Jaeger 2002-04-14 07:24:12 +00:00
parent 53af71e0fd
commit b91703dc38
1 changed files with 12 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
sysdeps/i386/i486/bits/string.h
View File

@ -463,6 +463,8 @@ memchr (__const void *__s, int __c, size_t __n)
#define _HAVE_STRING_ARCH_memrchr 1
#ifndef _FORCE_INLINES
__STRING_INLINE void *__memrchr (__const void *__s, int __c, size_t __n);
__STRING_INLINE void *
__memrchr (__const void *__s, int __c, size_t __n)
{
@ -729,11 +731,9 @@ __mempcpy_by4 (char *__dest, __const char *__src, size_t __srclen)
"leal 4(%1),%1\n\t"
"decl %3\n\t"
"jnz 1b"
: "=&r" (__d0), "=r" (__tmp), "=&r" (__src), "=&r" (__d1),
"=m" ( *(struct { __extension__ char __x[__srclen]; } *)__dest)
: "1" (__tmp), "2" (__src), "3" (__srclen / 4),
"m" ( *(struct { __extension__ char __x[__srclen]; } *)__src)
: "cc");
: "=&r" (__d0), "=r" (__tmp), "=&r" (__src), "=&r" (__d1)
: "1" (__tmp), "2" (__src), "3" (__srclen / 4)
: "memory", "cc");
return __tmp;
}
@ -1535,10 +1535,8 @@ __strcspn_cg (__const char *__s, __const char __reject[], size_t __reject_len)
"jne 1b\n"
"2:"
: "=S" (__res), "=&a" (__d0), "=&c" (__d1), "=&D" (__d2)
: "0" (__s), "d" (__reject), "g" (__reject_len),
"m" ( *(struct { char __x[0xfffffff]; } *)__s),
"m" ( *(struct { __extension__ char __x[__reject_len]; } *)__reject)
: "cc");
: "0" (__s), "d" (__reject), "g" (__reject_len)
: "memory", "cc");
return (__res - 1) - __s;
}
@ -1657,6 +1655,7 @@ __strspn_cg (__const char *__s, __const char __accept[], size_t __accept_len)
"2:"
: "=S" (__res), "=&d" (__d0), "=&c" (__d1), "=&D" (__d2)
: "0" (__s), "1" (__accept), "g" (__accept_len),
/* Since we do not know how large the memory we access it, use a really large amount. */
"m" ( *(struct { char __x[0xfffffff]; } *)__s),
"m" ( *(struct { __extension__ char __x[__accept_len]; } *)__accept)
: "cc");
@ -1755,10 +1754,8 @@ __strpbrk_cg (__const char *__s, __const char __accept[], size_t __accept_len)
"xorl %0,%0\n"
"3:"
: "=S" (__res), "=&a" (__d0), "=&c" (__d1), "=&D" (__d2)
: "0" (__s), "d" (__accept), "g" (__accept_len),
"m" ( *(struct { char __x[0xfffffff]; } *)__s),
"m" ( *(struct { __extension__ char __x[__accept_len]; } *)__accept)
: "cc");
: "0" (__s), "d" (__accept), "g" (__accept_len)
: "memory", "cc");
return __res;
}
@ -1865,11 +1862,8 @@ __strstr_cg (__const char *__haystack, __const char __needle[],
"xorl %%eax,%%eax\n"
"2:"
: "=a" (__res), "=&S" (__d0), "=&D" (__d1), "=&c" (__d2)
: "g" (__needle_len), "1" (__haystack), "d" (__needle),
/* Since we do not know how large the memory we access it, use a really large amount. */
"m" ( *(struct { char __x[0xfffffff]; } *)__haystack),
"m" ( *(struct { __extension__ char __x[__needle_len]; } *)__needle)
: "cc");
: "g" (__needle_len), "1" (__haystack), "d" (__needle)
: "memory", "cc");
return __res;
}