-/* Optimized, inlined string functions. i486 version.
- Copyright (C) 1997,1998,1999,2000,2001,2002,2003,2004,2007,2011,2012
- Free Software Foundation, Inc.
+/* Optimized, inlined string functions. i486/x86-64 version.
+ Copyright (C) 2001-2012 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
/* The ix86 processors can access unaligned multi-byte variables. */
#define _STRING_ARCH_unaligned 1
+/* Enable inline functions only for i486 or bette when compiling for
+ ia32. */
+#if !defined __x86_64__ && (defined __i486__ || defined __pentium__ \
+ || defined __pentiumpro__ || defined __pentium4__ \
+ || defined __nocona__ || defined __atom__ \
+ || defined __core2__ || defined __corei7__ \
+ || defined __k6__ || defined __geode__ \
+ || defined __k8__ || defined __athlon__ \
+ || defined __amdfam10__)
/* We only provide optimizations if the user selects them and if
GNU CC is used. */
-#if !defined __NO_STRING_INLINES && defined __USE_STRING_INLINES \
+# if !defined __NO_STRING_INLINES && defined __USE_STRING_INLINES \
&& defined __GNUC__ && __GNUC__ >= 2 && !__BOUNDED_POINTERS__
-#ifndef __STRING_INLINE
-# ifndef __extern_inline
-# define __STRING_INLINE inline
-# else
-# define __STRING_INLINE __extern_inline
+# ifndef __STRING_INLINE
+# ifndef __extern_inline
+# define __STRING_INLINE inline
+# else
+# define __STRING_INLINE __extern_inline
+# endif
# endif
-#endif
/* The macros are used in some of the optimized implementations below. */
-#define __STRING_SMALL_GET16(src, idx) \
+# define __STRING_SMALL_GET16(src, idx) \
((((const unsigned char *) (src))[idx + 1] << 8) \
| ((const unsigned char *) (src))[idx])
-#define __STRING_SMALL_GET32(src, idx) \
+# define __STRING_SMALL_GET32(src, idx) \
(((((const unsigned char *) (src))[idx + 3] << 8 \
| ((const unsigned char *) (src))[idx + 2]) << 8 \
| ((const unsigned char *) (src))[idx + 1]) << 8 \
/* Copy N bytes of SRC to DEST. */
-#define _HAVE_STRING_ARCH_memcpy 1
-#define memcpy(dest, src, n) \
+# define _HAVE_STRING_ARCH_memcpy 1
+# define memcpy(dest, src, n) \
(__extension__ (__builtin_constant_p (n) \
? __memcpy_c ((dest), (src), (n)) \
: __memcpy_g ((dest), (src), (n))))
-#define __memcpy_c(dest, src, n) \
+# define __memcpy_c(dest, src, n) \
((n) == 0 \
? (dest) \
: (((n) % 4 == 0) \
return __dest;
}
-#define _HAVE_STRING_ARCH_memmove 1
-#ifndef _FORCE_INLINES
+# define _HAVE_STRING_ARCH_memmove 1
+# ifndef _FORCE_INLINES
/* Copy N bytes of SRC to DEST, guaranteeing
correct behavior for overlapping strings. */
-#define memmove(dest, src, n) __memmove_g (dest, src, n)
+# define memmove(dest, src, n) __memmove_g (dest, src, n)
__STRING_INLINE void *__memmove_g (void *, const void *, size_t)
__asm__ ("memmove");
"m" ( *(struct { __extension__ char __x[__n]; } *)__src));
return __dest;
}
-#endif
+# endif
/* Compare N bytes of S1 and S2. */
-#define _HAVE_STRING_ARCH_memcmp 1
-#ifndef _FORCE_INLINES
-# ifndef __PIC__
+# define _HAVE_STRING_ARCH_memcmp 1
+# ifndef _FORCE_INLINES
+# ifndef __PIC__
/* gcc has problems to spill registers when using PIC. */
__STRING_INLINE int
memcmp (const void *__s1, const void *__s2, size_t __n)
: "cc");
return __res;
}
+# endif
# endif
-#endif
/* Set N bytes of S to C. */
-#define _HAVE_STRING_ARCH_memset 1
-#define _USE_STRING_ARCH_memset 1
-#define memset(s, c, n) \
+# define _HAVE_STRING_ARCH_memset 1
+# define _USE_STRING_ARCH_memset 1
+# define memset(s, c, n) \
(__extension__ (__builtin_constant_p (n) && (n) <= 16 \
? ((n) == 1 \
? __memset_c1 ((s), (c)) \
? __memset_gcn ((s), (c), (n)) \
: memset ((s), (c), (n))))))
-#define __memset_c1(s, c) ({ void *__s = (s); \
- *((unsigned char *) __s) = (unsigned char) (c); \
- __s; })
+# define __memset_c1(s, c) ({ void *__s = (s); \
+ *((unsigned char *) __s) = (unsigned char) (c); \
+ __s; })
-#define __memset_gc(s, c, n) \
+# define __memset_gc(s, c, n) \
({ void *__s = (s); \
union { \
unsigned int __ui; \
\
__s; })
-#define __memset_ccn(s, c, n) \
+# define __memset_ccn(s, c, n) \
(((n) % 4 == 0) \
? __memset_ccn_by4 (s, ((unsigned int) ((unsigned char) (c))) * 0x01010101,\
n) \
{
register void *__tmp = __s;
register unsigned long int __d0;
-#ifdef __i686__
+# ifdef __i686__
__asm__ __volatile__
("cld\n\t"
"rep; stosl"
"=m" ( *(struct { __extension__ char __x[__n]; } *)__s)
: "0" ((unsigned int) __c), "1" (__tmp), "2" (__n / 4)
: "cc");
-#else
+# else
__asm__ __volatile__
("1:\n\t"
"movl %0,(%1)\n\t"
"=m" ( *(struct { __extension__ char __x[__n]; } *)__s)
: "0" ((unsigned int) __c), "1" (__tmp), "2" (__n / 4)
: "cc");
-#endif
+# endif
return __s;
}
{
register unsigned long int __d0, __d1;
register void *__tmp = __s;
-#ifdef __i686__
+# ifdef __i686__
__asm__ __volatile__
("cld\n\t"
"rep; stosl\n"
"=m" ( *(struct { __extension__ char __x[__n]; } *)__s)
: "0" ((unsigned int) __c), "1" (__tmp), "2" (__n / 4)
: "cc");
-#else
+# else
__asm__ __volatile__
("1:\tmovl %0,(%1)\n\t"
"leal 4(%1),%1\n\t"
return __s;
}
-#define __memset_gcn(s, c, n) \
+# define __memset_gcn(s, c, n) \
(((n) % 4 == 0) \
? __memset_gcn_by4 (s, c, n) \
: (((n) % 2 == 0) \
/* Search N bytes of S for C. */
-#define _HAVE_STRING_ARCH_memchr 1
-#ifndef _FORCE_INLINES
+# define _HAVE_STRING_ARCH_memchr 1
+# ifndef _FORCE_INLINES
__STRING_INLINE void *
memchr (const void *__s, int __c, size_t __n)
{
register unsigned long int __d0;
-#ifdef __i686__
+# ifdef __i686__
register unsigned long int __d1;
-#endif
+# endif
register unsigned char *__res;
if (__n == 0)
return NULL;
-#ifdef __i686__
+# ifdef __i686__
__asm__ __volatile__
("cld\n\t"
"repne; scasb\n\t"
: "a" (__c), "0" (__s), "1" (__n), "2" (1),
"m" ( *(struct { __extension__ char __x[__n]; } *)__s)
: "cc");
-#else
+# else
__asm__ __volatile__
("cld\n\t"
"repne; scasb\n\t"
: "a" (__c), "0" (__s), "1" (__n),
"m" ( *(struct { __extension__ char __x[__n]; } *)__s)
: "cc");
-#endif
+# endif
return __res - 1;
}
-#endif
+# endif
-#define _HAVE_STRING_ARCH_memrchr 1
-#ifndef _FORCE_INLINES
+# 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)
{
register unsigned long int __d0;
-# ifdef __i686__
+# ifdef __i686__
register unsigned long int __d1;
-# endif
+# endif
register void *__res;
if (__n == 0)
return NULL;
-# ifdef __i686__
+# ifdef __i686__
__asm__ __volatile__
("std\n\t"
"repne; scasb\n\t"
: "a" (__c), "0" (__s + __n - 1), "1" (__n), "2" (-1),
"m" ( *(struct { __extension__ char __x[__n]; } *)__s)
: "cc");
-# else
+# else
__asm__ __volatile__
("std\n\t"
"repne; scasb\n\t"
: "a" (__c), "0" (__s + __n - 1), "1" (__n),
"m" ( *(struct { __extension__ char __x[__n]; } *)__s)
: "cc");
-# endif
+# endif
return __res;
}
-# ifdef __USE_GNU
-# define memrchr(s, c, n) __memrchr ((s), (c), (n))
+# ifdef __USE_GNU
+# define memrchr(s, c, n) __memrchr ((s), (c), (n))
+# endif
# endif
-#endif
/* Return pointer to C in S. */
-#define _HAVE_STRING_ARCH_rawmemchr 1
+# define _HAVE_STRING_ARCH_rawmemchr 1
__STRING_INLINE void *__rawmemchr (const void *__s, int __c);
-#ifndef _FORCE_INLINES
+# ifndef _FORCE_INLINES
__STRING_INLINE void *
__rawmemchr (const void *__s, int __c)
{
: "cc");
return __res - 1;
}
-# ifdef __USE_GNU
+# ifdef __USE_GNU
__STRING_INLINE void *
rawmemchr (const void *__s, int __c)
{
return __rawmemchr (__s, __c);
}
-# endif /* use GNU */
-#endif
+# endif /* use GNU */
+# endif
/* Return the length of S. */
-#define _HAVE_STRING_ARCH_strlen 1
-#define strlen(str) \
+# define _HAVE_STRING_ARCH_strlen 1
+# define strlen(str) \
(__extension__ (__builtin_constant_p (str) \
? __builtin_strlen (str) \
: __strlen_g (str)))
/* Copy SRC to DEST. */
-#define _HAVE_STRING_ARCH_strcpy 1
-#define strcpy(dest, src) \
+# define _HAVE_STRING_ARCH_strcpy 1
+# define strcpy(dest, src) \
(__extension__ (__builtin_constant_p (src) \
? (sizeof ((src)[0]) == 1 && strlen (src) + 1 <= 8 \
? __strcpy_a_small ((dest), (src), strlen (src) + 1) \
strlen (src) + 1)) \
: __strcpy_g ((dest), (src))))
-#define __strcpy_a_small(dest, src, srclen) \
+# define __strcpy_a_small(dest, src, srclen) \
(__extension__ ({ char *__dest = (dest); \
union { \
unsigned int __ui; \
}
-#ifdef __USE_GNU
-# define _HAVE_STRING_ARCH_stpcpy 1
+# ifdef __USE_GNU
+# define _HAVE_STRING_ARCH_stpcpy 1
/* Copy SRC to DEST. */
-# define __stpcpy(dest, src) \
+# define __stpcpy(dest, src) \
(__extension__ (__builtin_constant_p (src) \
? (strlen (src) + 1 <= 8 \
? __stpcpy_a_small ((dest), (src), strlen (src) + 1) \
: __stpcpy_c ((dest), (src), strlen (src) + 1)) \
: __stpcpy_g ((dest), (src))))
-# define __stpcpy_c(dest, src, srclen) \
+# define __stpcpy_c(dest, src, srclen) \
((srclen) % 4 == 0 \
? __mempcpy_by4 (dest, src, srclen) - 1 \
: ((srclen) % 2 == 0 \
: __mempcpy_byn (dest, src, srclen) - 1))
/* In glibc itself we use this symbol for namespace reasons. */
-# define stpcpy(dest, src) __stpcpy ((dest), (src))
+# define stpcpy(dest, src) __stpcpy ((dest), (src))
-# define __stpcpy_a_small(dest, src, srclen) \
+# define __stpcpy_a_small(dest, src, srclen) \
(__extension__ ({ union { \
unsigned int __ui; \
unsigned short int __usi; \
: "cc");
return __tmp - 1;
}
-#endif
+# endif
/* Copy no more than N characters of SRC to DEST. */
-#define _HAVE_STRING_ARCH_strncpy 1
-#define strncpy(dest, src, n) \
+# define _HAVE_STRING_ARCH_strncpy 1
+# define strncpy(dest, src, n) \
(__extension__ (__builtin_constant_p (src) \
? ((strlen (src) + 1 >= ((size_t) (n)) \
? (char *) memcpy ((char *) (dest), \
(const char *) (src), n) \
: __strncpy_cg ((dest), (src), strlen (src) + 1, n))) \
: __strncpy_gg ((dest), (src), n)))
-#define __strncpy_cg(dest, src, srclen, n) \
+# define __strncpy_cg(dest, src, srclen, n) \
(((srclen) % 4 == 0) \
? __strncpy_by4 (dest, src, srclen, n) \
: (((srclen) % 2 == 0) \
/* Append SRC onto DEST. */
-#define _HAVE_STRING_ARCH_strcat 1
-#define strcat(dest, src) \
+# define _HAVE_STRING_ARCH_strcat 1
+# define strcat(dest, src) \
(__extension__ (__builtin_constant_p (src) \
? __strcat_c ((dest), (src), strlen (src) + 1) \
: __strcat_g ((dest), (src))))
__STRING_INLINE char *
__strcat_c (char *__dest, const char __src[], size_t __srclen)
{
-#ifdef __i686__
+# ifdef __i686__
register unsigned long int __d0;
register char *__tmp;
__asm__ __volatile__
"m" ( *(struct { __extension__ char __x[__srclen]; } *)__src)
: "cc");
--__tmp;
-#else
+# else
register char *__tmp = __dest - 1;
__asm__ __volatile__
("1:\n\t"
: "0" (__tmp),
"m" ( *(struct { __extension__ char __x[__srclen]; } *)__src)
: "cc");
-#endif
+# endif
(void) memcpy (__tmp, __src, __srclen);
return __dest;
}
/* Append no more than N characters from SRC onto DEST. */
-#define _HAVE_STRING_ARCH_strncat 1
-#define strncat(dest, src, n) \
+# define _HAVE_STRING_ARCH_strncat 1
+# define strncat(dest, src, n) \
(__extension__ ({ char *__dest = (dest); \
__builtin_constant_p (src) && __builtin_constant_p (n) \
? (strlen (src) < ((size_t) (n)) \
{
register char *__tmp = __dest;
register char __dummy;
-#ifdef __i686__
+# ifdef __i686__
__asm__ __volatile__
("repne; scasb\n"
"movl %4, %3\n\t"
: "=&a" (__dummy), "=&D" (__tmp), "=&S" (__src), "=&c" (__n)
: "g" (__n), "0" (0), "1" (__tmp), "2" (__src), "3" (0xffffffff)
: "memory", "cc");
-#else
+# else
--__tmp;
__asm__ __volatile__
("1:\n\t"
/* Compare S1 and S2. */
-#define _HAVE_STRING_ARCH_strcmp 1
-#define strcmp(s1, s2) \
+# define _HAVE_STRING_ARCH_strcmp 1
+# define strcmp(s1, s2) \
(__extension__ (__builtin_constant_p (s1) && __builtin_constant_p (s2) \
&& (sizeof ((s1)[0]) != 1 || strlen (s1) >= 4) \
&& (sizeof ((s2)[0]) != 1 || strlen (s2) >= 4) \
strlen (s2))) \
: __strcmp_gg ((s1), (s2))))))
-#define __strcmp_cc(s1, s2, l) \
+# define __strcmp_cc(s1, s2, l) \
(__extension__ ({ register int __result = (s1)[0] - (s2)[0]; \
if (l > 0 && __result == 0) \
{ \
} \
__result; }))
-#define __strcmp_cg(s1, s2, l1) \
+# define __strcmp_cg(s1, s2, l1) \
(__extension__ ({ const unsigned char *__s2 = (s2); \
register int __result = (s1)[0] - __s2[0]; \
if (l1 > 0 && __result == 0) \
} \
__result; }))
-#define __strcmp_gc(s1, s2, l2) \
+# define __strcmp_gc(s1, s2, l2) \
(__extension__ ({ const unsigned char *__s1 = (s1); \
register int __result = __s1[0] - (s2)[0]; \
if (l2 > 0 && __result == 0) \
/* Compare N characters of S1 and S2. */
-#define _HAVE_STRING_ARCH_strncmp 1
-#define strncmp(s1, s2, n) \
+# define _HAVE_STRING_ARCH_strncmp 1
+# define strncmp(s1, s2, n) \
(__extension__ (__builtin_constant_p (s1) && strlen (s1) < ((size_t) (n)) \
? strcmp ((s1), (s2)) \
: (__builtin_constant_p (s2) && strlen (s2) < ((size_t) (n))\
/* Find the first occurrence of C in S. */
-#define _HAVE_STRING_ARCH_strchr 1
-#define _USE_STRING_ARCH_strchr 1
-#define strchr(s, c) \
+# define _HAVE_STRING_ARCH_strchr 1
+# define _USE_STRING_ARCH_strchr 1
+# define strchr(s, c) \
(__extension__ (__builtin_constant_p (c) \
? ((c) == '\0' \
? (char *) __rawmemchr ((s), (c)) \
/* Find the first occurrence of C in S or the final NUL byte. */
-#define _HAVE_STRING_ARCH_strchrnul 1
-#define __strchrnul(s, c) \
+# define _HAVE_STRING_ARCH_strchrnul 1
+# define __strchrnul(s, c) \
(__extension__ (__builtin_constant_p (c) \
? ((c) == '\0' \
? (char *) __rawmemchr ((s), c) \
: "cc");
return __res;
}
-#ifdef __USE_GNU
-# define strchrnul(s, c) __strchrnul ((s), (c))
-#endif
+# ifdef __USE_GNU
+# define strchrnul(s, c) __strchrnul ((s), (c))
+# endif
-#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
+# if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
/* Find the first occurrence of C in S. This is the BSD name. */
-# define _HAVE_STRING_ARCH_index 1
-# define index(s, c) \
+# define _HAVE_STRING_ARCH_index 1
+# define index(s, c) \
(__extension__ (__builtin_constant_p (c) \
? __strchr_c ((s), ((c) & 0xff) << 8) \
: __strchr_g ((s), (c))))
-#endif
+# endif
/* Find the last occurrence of C in S. */
-#define _HAVE_STRING_ARCH_strrchr 1
-#define strrchr(s, c) \
+# define _HAVE_STRING_ARCH_strrchr 1
+# define strrchr(s, c) \
(__extension__ (__builtin_constant_p (c) \
? __strrchr_c ((s), ((c) & 0xff) << 8) \
: __strrchr_g ((s), (c))))
-#ifdef __i686__
+# ifdef __i686__
__STRING_INLINE char *__strrchr_c (const char *__s, int __c);
__STRING_INLINE char *
: "cc");
return __res - 1;
}
-#else
+# else
__STRING_INLINE char *__strrchr_c (const char *__s, int __c);
__STRING_INLINE char *
: "cc");
return __res;
}
-#endif
+# endif
-#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
+# if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
/* Find the last occurrence of C in S. This is the BSD name. */
-# define _HAVE_STRING_ARCH_rindex 1
-# define rindex(s, c) \
+# define _HAVE_STRING_ARCH_rindex 1
+# define rindex(s, c) \
(__extension__ (__builtin_constant_p (c) \
? __strrchr_c ((s), ((c) & 0xff) << 8) \
: __strrchr_g ((s), (c))))
-#endif
+# endif
/* Return the length of the initial segment of S which
consists entirely of characters not in REJECT. */
-#define _HAVE_STRING_ARCH_strcspn 1
-#define strcspn(s, reject) \
+# define _HAVE_STRING_ARCH_strcspn 1
+# define strcspn(s, reject) \
(__extension__ (__builtin_constant_p (reject) && sizeof ((reject)[0]) == 1 \
? ((reject)[0] == '\0' \
? strlen (s) \
__STRING_INLINE size_t __strcspn_c1 (const char *__s, int __reject);
-#ifndef _FORCE_INLINES
+# ifndef _FORCE_INLINES
__STRING_INLINE size_t
__strcspn_c1 (const char *__s, int __reject)
{
: "cc");
return (__res - 1) - __s;
}
-#endif
+# endif
__STRING_INLINE size_t __strcspn_cg (const char *__s, const char __reject[],
size_t __reject_len);
}
__STRING_INLINE size_t __strcspn_g (const char *__s, const char *__reject);
-#ifdef __PIC__
+# ifdef __PIC__
__STRING_INLINE size_t
__strcspn_g (const char *__s, const char *__reject)
: "memory", "cc");
return (__res - 1) - __s;
}
-#else
+# else
__STRING_INLINE size_t
__strcspn_g (const char *__s, const char *__reject)
{
: "memory", "cc");
return (__res - 1) - __s;
}
-#endif
+# endif
/* Return the length of the initial segment of S which
consists entirely of characters in ACCEPT. */
-#define _HAVE_STRING_ARCH_strspn 1
-#define strspn(s, accept) \
+# define _HAVE_STRING_ARCH_strspn 1
+# define strspn(s, accept) \
(__extension__ (__builtin_constant_p (accept) && sizeof ((accept)[0]) == 1 \
? ((accept)[0] == '\0' \
? ((void) (s), 0) \
: __strspn_cg ((s), (accept), strlen (accept)))) \
: __strspn_g ((s), (accept))))
-#ifndef _FORCE_INLINES
+# ifndef _FORCE_INLINES
__STRING_INLINE size_t __strspn_c1 (const char *__s, int __accept);
__STRING_INLINE size_t
: "cc");
return (__res - 1) - __s;
}
-#endif
+# endif
__STRING_INLINE size_t __strspn_cg (const char *__s, const char __accept[],
size_t __accept_len);
}
__STRING_INLINE size_t __strspn_g (const char *__s, const char *__accept);
-#ifdef __PIC__
+# ifdef __PIC__
__STRING_INLINE size_t
__strspn_g (const char *__s, const char *__accept)
: "memory", "cc");
return (__res - 1) - __s;
}
-#else
+# else
__STRING_INLINE size_t
__strspn_g (const char *__s, const char *__accept)
{
: "memory", "cc");
return (__res - 1) - __s;
}
-#endif
+# endif
/* Find the first occurrence in S of any character in ACCEPT. */
-#define _HAVE_STRING_ARCH_strpbrk 1
-#define strpbrk(s, accept) \
+# define _HAVE_STRING_ARCH_strpbrk 1
+# define strpbrk(s, accept) \
(__extension__ (__builtin_constant_p (accept) && sizeof ((accept)[0]) == 1 \
? ((accept)[0] == '\0' \
? ((void) (s), (char *) 0) \
}
__STRING_INLINE char *__strpbrk_g (const char *__s, const char *__accept);
-#ifdef __PIC__
+# ifdef __PIC__
__STRING_INLINE char *
__strpbrk_g (const char *__s, const char *__accept)
: "memory", "cc");
return __res;
}
-#else
+# else
__STRING_INLINE char *
__strpbrk_g (const char *__s, const char *__accept)
{
: "memory", "cc");
return __res;
}
-#endif
+# endif
/* Find the first occurrence of NEEDLE in HAYSTACK. */
-#define _HAVE_STRING_ARCH_strstr 1
-#define strstr(haystack, needle) \
+# define _HAVE_STRING_ARCH_strstr 1
+# define strstr(haystack, needle) \
(__extension__ (__builtin_constant_p (needle) && sizeof ((needle)[0]) == 1 \
? ((needle)[0] == '\0' \
? (haystack) \
__STRING_INLINE char *__strstr_g (const char *__haystack,
const char *__needle);
-#ifdef __PIC__
+# ifdef __PIC__
__STRING_INLINE char *
__strstr_g (const char *__haystack, const char *__needle)
: "memory", "cc");
return __res;
}
-#else
+# else
__STRING_INLINE char *
__strstr_g (const char *__haystack, const char *__needle)
{
: "memory", "cc");
return __res;
}
-#endif
+# endif
/* Bit find functions. We define only the i686 version since for the other
processors gcc generates good code. */
-#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
-# ifdef __i686__
-# define _HAVE_STRING_ARCH_ffs 1
-# define ffs(word) (__builtin_constant_p (word) \
- ? __builtin_ffs (word) \
- : ({ int __cnt, __tmp; \
- __asm__ __volatile__ \
- ("bsfl %2,%0\n\t" \
- "cmovel %1,%0" \
- : "=&r" (__cnt), "=r" (__tmp) \
- : "rm" (word), "1" (-1)); \
- __cnt + 1; }))
-
-# ifndef ffsl
-# define ffsl(word) ffs(word)
-# endif
-# endif /* i686 */
-#endif /* BSD || X/Open */
+# if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
+# ifdef __i686__
+# define _HAVE_STRING_ARCH_ffs 1
+# define ffs(word) (__builtin_constant_p (word) \
+ ? __builtin_ffs (word) \
+ : ({ int __cnt, __tmp; \
+ __asm__ __volatile__ \
+ ("bsfl %2,%0\n\t" \
+ "cmovel %1,%0" \
+ : "=&r" (__cnt), "=r" (__tmp) \
+ : "rm" (word), "1" (-1)); \
+ __cnt + 1; }))
+
+# ifndef ffsl
+# define ffsl(word) ffs(word)
+# endif
+# endif /* i686 */
+# endif /* BSD || X/Open */
+
+# ifndef _FORCE_INLINES
+# undef __STRING_INLINE
+# endif
-#ifndef _FORCE_INLINES
-# undef __STRING_INLINE
-#endif
+# endif /* use string inlines && GNU CC */
-#endif /* use string inlines && GNU CC */
+#endif
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