AuroraMiddleware/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2024-11-26 23:10:06 +00:00
Code Issues Packages Projects Releases Wiki Activity
82641e16aa
glibc/sysdeps/x86/bits/string.h
Torvald Riegel 213a2be7b4 Do not create invalid pointers in C code of string functions. 
Some of the x86 string functions create pointers based on input strings
that may be outside of the input strings.  When this happens in C code,
the compiler can potentially detect this, leading to warnings in
application code when those string functions are inlined.  Perform those
operations in the assembly code instead of the C code to fix this.
2015-07-07 13:40:12 +02:00

1995 lines
57 KiB
C
Raw Blame History

/* Optimized, inlined string functions. i486/x86-64 version.
Copyright (C) 2001-2015 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
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifndef _STRING_H
# error "Never use <bits/string.h> directly; include <string.h> instead."
#endif
/* The ix86 processors can access unaligned multi-byte variables. */
#define _STRING_ARCH_unaligned 1
/* Enable inline functions only for i486 or better 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 __sandybridge__ || defined __haswell__ \
|| defined __bonnell__ || defined __silvermont__ \
|| defined __k6__ || defined __geode__ \
|| defined __k8__ || defined __athlon__ \
|| defined __amdfam10__ || defined __bdver1__ \
|| defined __bdver2__ || defined __bdver3__ \
|| defined __bdver4__ || defined __btver1__ \
|| defined __btver2__)
/* We only provide optimizations if the user selects them and if
GNU CC is used. */
# if !defined __NO_STRING_INLINES && defined __USE_STRING_INLINES \
&& defined __GNUC__ && __GNUC__ >= 2
# ifndef __STRING_INLINE
# ifndef __extern_inline
# define __STRING_INLINE inline
# else
# define __STRING_INLINE __extern_inline
# endif
# endif
/* The macros are used in some of the optimized implementations below. */
# define __STRING_SMALL_GET16(src, idx) \
((((const unsigned char *) (src))[idx + 1] << 8) \
| ((const unsigned char *) (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 \
| ((const unsigned char *) (src))[idx])
/* Copy N bytes of SRC to DEST. */
# 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) \
((n) == 0 \
? (dest) \
: (((n) % 4 == 0) \
? __memcpy_by4 (dest, src, n) \
: (((n) % 2 == 0) \
? __memcpy_by2 (dest, src, n) \
: __memcpy_g (dest, src, n))))
__STRING_INLINE void *__memcpy_by4 (void *__dest, const void *__src,
size_t __n);
__STRING_INLINE void *
__memcpy_by4 (void *__dest, const void *__src, size_t __n)
{
register unsigned long int __d0, __d1;
register void *__tmp = __dest;
__asm__ __volatile__
("1:\n\t"
"movl (%2),%0\n\t"
"leal 4(%2),%2\n\t"
"movl %0,(%1)\n\t"
"leal 4(%1),%1\n\t"
"decl %3\n\t"
"jnz 1b"
: "=&r" (__d0), "=&r" (__tmp), "=&r" (__src), "=&r" (__d1)
: "1" (__tmp), "2" (__src), "3" (__n / 4)
: "memory", "cc");
return __dest;
}
__STRING_INLINE void *__memcpy_by2 (void *__dest, const void *__src,
size_t __n);
__STRING_INLINE void *
__memcpy_by2 (void *__dest, const void *__src, size_t __n)
{
register unsigned long int __d0, __d1;
register void *__tmp = __dest;
__asm__ __volatile__
("shrl $1,%3\n\t"
"jz 2f\n" /* only a word */
"1:\n\t"
"movl (%2),%0\n\t"
"leal 4(%2),%2\n\t"
"movl %0,(%1)\n\t"
"leal 4(%1),%1\n\t"
"decl %3\n\t"
"jnz 1b\n"
"2:\n\t"
"movw (%2),%w0\n\t"
"movw %w0,(%1)"
: "=&q" (__d0), "=&r" (__tmp), "=&r" (__src), "=&r" (__d1)
: "1" (__tmp), "2" (__src), "3" (__n / 2)
: "memory", "cc");
return __dest;
}
__STRING_INLINE void *__memcpy_g (void *__dest, const void *__src, size_t __n);
__STRING_INLINE void *
__memcpy_g (void *__dest, const void *__src, size_t __n)
{
register unsigned long int __d0, __d1, __d2;
register void *__tmp = __dest;
__asm__ __volatile__
("cld\n\t"
"shrl $1,%%ecx\n\t"
"jnc 1f\n\t"
"movsb\n"
"1:\n\t"
"shrl $1,%%ecx\n\t"
"jnc 2f\n\t"
"movsw\n"
"2:\n\t"
"rep; movsl"
: "=&c" (__d0), "=&D" (__d1), "=&S" (__d2),
"=m" ( *(struct { __extension__ char __x[__n]; } *)__dest)
: "0" (__n), "1" (__tmp), "2" (__src),
"m" ( *(struct { __extension__ char __x[__n]; } *)__src)
: "cc");
return __dest;
}
# 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)
__STRING_INLINE void *__memmove_g (void *, const void *, size_t)
__asm__ ("memmove");
__STRING_INLINE void *
__memmove_g (void *__dest, const void *__src, size_t __n)
{
register unsigned long int __d0, __d1, __d2;
register void *__tmp = __dest;
if (__dest < __src)
__asm__ __volatile__
("cld\n\t"
"rep; movsb"
: "=&c" (__d0), "=&S" (__d1), "=&D" (__d2),
"=m" ( *(struct { __extension__ char __x[__n]; } *)__dest)
: "0" (__n), "1" (__src), "2" (__tmp),
"m" ( *(struct { __extension__ char __x[__n]; } *)__src));
else
__asm__ __volatile__
("decl %1\n\t"
"decl %2\n\t"
"std\n\t"
"rep; movsb\n\t"
"cld"
: "=&c" (__d0), "=&S" (__d1), "=&D" (__d2),
"=m" ( *(struct { __extension__ char __x[__n]; } *)__dest)
: "0" (__n), "1" (__n + (const char *) __src),
"2" (__n + (char *) __tmp),
"m" ( *(struct { __extension__ char __x[__n]; } *)__src));
return __dest;
}
# endif
/* Compare N bytes of S1 and S2. */
# 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)
{
register unsigned long int __d0, __d1, __d2;
register int __res;
__asm__ __volatile__
("cld\n\t"
"testl %3,%3\n\t"
"repe; cmpsb\n\t"
"je 1f\n\t"
"sbbl %0,%0\n\t"
"orl $1,%0\n"
"1:"
: "=&a" (__res), "=&S" (__d0), "=&D" (__d1), "=&c" (__d2)
: "0" (0), "1" (__s1), "2" (__s2), "3" (__n),
"m" ( *(struct { __extension__ char __x[__n]; } *)__s1),
"m" ( *(struct { __extension__ char __x[__n]; } *)__s2)
: "cc");
return __res;
}
# 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) \
(__extension__ (__builtin_constant_p (n) && (n) <= 16 \
? ((n) == 1 \
? __memset_c1 ((s), (c)) \
: __memset_gc ((s), (c), (n))) \
: (__builtin_constant_p (c) \
? (__builtin_constant_p (n) \
? __memset_ccn ((s), (c), (n)) \
: memset ((s), (c), (n))) \
: (__builtin_constant_p (n) \
? __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_gc(s, c, n) \
({ void *__s = (s); \
union { \
unsigned int __ui; \
unsigned short int __usi; \
unsigned char __uc; \
} *__u = __s; \
unsigned int __c = ((unsigned int) ((unsigned char) (c))) * 0x01010101; \
\
/* We apply a trick here. `gcc' would implement the following \
assignments using immediate operands. But this uses to much \
memory (7, instead of 4 bytes). So we force the value in a \
registers. */ \
if ((n) == 3 || (n) >= 5) \
__asm__ __volatile__ ("" : "=r" (__c) : "0" (__c)); \
\
/* This `switch' statement will be removed at compile-time. */ \
switch (n) \
{ \
case 15: \
__u->__ui = __c; \
__u = __extension__ ((void *) __u + 4); \
case 11: \
__u->__ui = __c; \
__u = __extension__ ((void *) __u + 4); \
case 7: \
__u->__ui = __c; \
__u = __extension__ ((void *) __u + 4); \
case 3: \
__u->__usi = (unsigned short int) __c; \
__u = __extension__ ((void *) __u + 2); \
__u->__uc = (unsigned char) __c; \
break; \
\
case 14: \
__u->__ui = __c; \
__u = __extension__ ((void *) __u + 4); \
case 10: \
__u->__ui = __c; \
__u = __extension__ ((void *) __u + 4); \
case 6: \
__u->__ui = __c; \
__u = __extension__ ((void *) __u + 4); \
case 2: \
__u->__usi = (unsigned short int) __c; \
break; \
\
case 13: \
__u->__ui = __c; \
__u = __extension__ ((void *) __u + 4); \
case 9: \
__u->__ui = __c; \
__u = __extension__ ((void *) __u + 4); \
case 5: \
__u->__ui = __c; \
__u = __extension__ ((void *) __u + 4); \
case 1: \
__u->__uc = (unsigned char) __c; \
break; \
\
case 16: \
__u->__ui = __c; \
__u = __extension__ ((void *) __u + 4); \
case 12: \
__u->__ui = __c; \
__u = __extension__ ((void *) __u + 4); \
case 8: \
__u->__ui = __c; \
__u = __extension__ ((void *) __u + 4); \
case 4: \
__u->__ui = __c; \
case 0: \
break; \
} \
\
__s; })
# define __memset_ccn(s, c, n) \
(((n) % 4 == 0) \
? __memset_ccn_by4 (s, ((unsigned int) ((unsigned char) (c))) * 0x01010101,\
n) \
: (((n) % 2 == 0) \
? __memset_ccn_by2 (s, \
((unsigned int) ((unsigned char) (c))) * 0x01010101,\
n) \
: memset (s, c, n)))
__STRING_INLINE void *__memset_ccn_by4 (void *__s, unsigned int __c,
size_t __n);
__STRING_INLINE void *
__memset_ccn_by4 (void *__s, unsigned int __c, size_t __n)
{
register void *__tmp = __s;
register unsigned long int __d0;
# ifdef __i686__
__asm__ __volatile__
("cld\n\t"
"rep; stosl"
: "=&a" (__c), "=&D" (__tmp), "=&c" (__d0),
"=m" ( *(struct { __extension__ char __x[__n]; } *)__s)
: "0" ((unsigned int) __c), "1" (__tmp), "2" (__n / 4)
: "cc");
# else
__asm__ __volatile__
("1:\n\t"
"movl %0,(%1)\n\t"
"addl $4,%1\n\t"
"decl %2\n\t"
"jnz 1b\n"
: "=&r" (__c), "=&r" (__tmp), "=&r" (__d0),
"=m" ( *(struct { __extension__ char __x[__n]; } *)__s)
: "0" ((unsigned int) __c), "1" (__tmp), "2" (__n / 4)
: "cc");
# endif
return __s;
}
__STRING_INLINE void *__memset_ccn_by2 (void *__s, unsigned int __c,
size_t __n);
__STRING_INLINE void *
__memset_ccn_by2 (void *__s, unsigned int __c, size_t __n)
{
register unsigned long int __d0, __d1;
register void *__tmp = __s;
# ifdef __i686__
__asm__ __volatile__
("cld\n\t"
"rep; stosl\n"
"stosw"
: "=&a" (__d0), "=&D" (__tmp), "=&c" (__d1),
"=m" ( *(struct { __extension__ char __x[__n]; } *)__s)
: "0" ((unsigned int) __c), "1" (__tmp), "2" (__n / 4)
: "cc");
# else
__asm__ __volatile__
("1:\tmovl %0,(%1)\n\t"
"leal 4(%1),%1\n\t"
"decl %2\n\t"
"jnz 1b\n"
"movw %w0,(%1)"
: "=&q" (__d0), "=&r" (__tmp), "=&r" (__d1),
"=m" ( *(struct { __extension__ char __x[__n]; } *)__s)
: "0" ((unsigned int) __c), "1" (__tmp), "2" (__n / 4)
: "cc");
#endif
return __s;
}
# define __memset_gcn(s, c, n) \
(((n) % 4 == 0) \
? __memset_gcn_by4 (s, c, n) \
: (((n) % 2 == 0) \
? __memset_gcn_by2 (s, c, n) \
: memset (s, c, n)))
__STRING_INLINE void *__memset_gcn_by4 (void *__s, int __c, size_t __n);
__STRING_INLINE void *
__memset_gcn_by4 (void *__s, int __c, size_t __n)
{
register void *__tmp = __s;
register unsigned long int __d0;
__asm__ __volatile__
("movb %b0,%h0\n"
"pushw %w0\n\t"
"shll $16,%0\n\t"
"popw %w0\n"
"1:\n\t"
"movl %0,(%1)\n\t"
"addl $4,%1\n\t"
"decl %2\n\t"
"jnz 1b\n"
: "=&q" (__c), "=&r" (__tmp), "=&r" (__d0),
"=m" ( *(struct { __extension__ char __x[__n]; } *)__s)
: "0" ((unsigned int) __c), "1" (__tmp), "2" (__n / 4)
: "cc");
return __s;
}
__STRING_INLINE void *__memset_gcn_by2 (void *__s, int __c, size_t __n);
__STRING_INLINE void *
__memset_gcn_by2 (void *__s, int __c, size_t __n)
{
register unsigned long int __d0, __d1;
register void *__tmp = __s;
__asm__ __volatile__
("movb %b0,%h0\n\t"
"pushw %w0\n\t"
"shll $16,%0\n\t"
"popw %w0\n"
"1:\n\t"
"movl %0,(%1)\n\t"
"leal 4(%1),%1\n\t"
"decl %2\n\t"
"jnz 1b\n"
"movw %w0,(%1)"
: "=&q" (__d0), "=&r" (__tmp), "=&r" (__d1),
"=m" ( *(struct { __extension__ char __x[__n]; } *)__s)
: "0" ((unsigned int) __c), "1" (__tmp), "2" (__n / 4)
: "cc");
return __s;
}
/* Search N bytes of S for C. */
# 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__
register unsigned long int __d1;
# endif
register unsigned char *__res;
if (__n == 0)
return NULL;
# ifdef __i686__
__asm__ __volatile__
("cld\n\t"
"repne; scasb\n\t"
"cmovne %2,%0"
: "=D" (__res), "=&c" (__d0), "=&r" (__d1)
: "a" (__c), "0" (__s), "1" (__n), "2" (1),
"m" ( *(struct { __extension__ char __x[__n]; } *)__s)
: "cc");
# else
__asm__ __volatile__
("cld\n\t"
"repne; scasb\n\t"
"je 1f\n\t"
"movl $1,%0\n"
"1:"
: "=D" (__res), "=&c" (__d0)
: "a" (__c), "0" (__s), "1" (__n),
"m" ( *(struct { __extension__ char __x[__n]; } *)__s)
: "cc");
# endif
return __res - 1;
}
# endif
# 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__
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\n\t"
"incl %0"
: "=D" (__res), "=&c" (__d0), "=&r" (__d1)
: "a" (__c), "0" (__s + __n - 1), "1" (__n), "2" (-1),
"m" ( *(struct { __extension__ char __x[__n]; } *)__s)
: "cc");
# else
__asm__ __volatile__
("std\n\t"
"repne; scasb\n\t"
"je 1f\n\t"
"orl $-1,%0\n"
"1:\tcld\n\t"
"incl %0"
: "=D" (__res), "=&c" (__d0)
: "a" (__c), "0" (__s + __n - 1), "1" (__n),
"m" ( *(struct { __extension__ char __x[__n]; } *)__s)
: "cc");
# endif
return __res;
}
# ifdef __USE_GNU
# define memrchr(s, c, n) __memrchr ((s), (c), (n))
# endif
# endif
/* Return pointer to C in S. */
# define _HAVE_STRING_ARCH_rawmemchr 1
__STRING_INLINE void *__rawmemchr (const void *__s, int __c);
# ifndef _FORCE_INLINES
__STRING_INLINE void *
__rawmemchr (const void *__s, int __c)
{
register unsigned long int __d0;
register unsigned char *__res;
__asm__ __volatile__
("cld\n\t"
"repne; scasb\n\t"
: "=D" (__res), "=&c" (__d0)
: "a" (__c), "0" (__s), "1" (0xffffffff),
"m" ( *(struct { char __x[0xfffffff]; } *)__s)
: "cc");
return __res - 1;
}
# ifdef __USE_GNU
__STRING_INLINE void *
rawmemchr (const void *__s, int __c)
{
return __rawmemchr (__s, __c);
}
# endif /* use GNU */
# endif
/* Return the length of S. */
# define _HAVE_STRING_ARCH_strlen 1
# define strlen(str) \
(__extension__ (__builtin_constant_p (str) \
? __builtin_strlen (str) \
: __strlen_g (str)))
__STRING_INLINE size_t __strlen_g (const char *__str);
__STRING_INLINE size_t
__strlen_g (const char *__str)
{
register char __dummy;
register const char *__tmp = __str;
__asm__ __volatile__
("1:\n\t"
"movb (%0),%b1\n\t"
"leal 1(%0),%0\n\t"
"testb %b1,%b1\n\t"
"jne 1b"
: "=r" (__tmp), "=&q" (__dummy)
: "0" (__str),
"m" ( *(struct { char __x[0xfffffff]; } *)__str)
: "cc" );
return __tmp - __str - 1;
}
/* Copy SRC to DEST. */
# 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) \
: (char *) memcpy ((char *) (dest), \
(const char *) (src), \
strlen (src) + 1)) \
: __strcpy_g ((dest), (src))))
# define __strcpy_a_small(dest, src, srclen) \
(__extension__ ({ char *__dest = (dest); \
union { \
unsigned int __ui; \
unsigned short int __usi; \
unsigned char __uc; \
char __c; \
} *__u = (void *) __dest; \
switch (srclen) \
{ \
case 1: \
__u->__uc = '\0'; \
break; \
case 2: \
__u->__usi = __STRING_SMALL_GET16 (src, 0); \
break; \
case 3: \
__u->__usi = __STRING_SMALL_GET16 (src, 0); \
__u = __extension__ ((void *) __u + 2); \
__u->__uc = '\0'; \
break; \
case 4: \
__u->__ui = __STRING_SMALL_GET32 (src, 0); \
break; \
case 5: \
__u->__ui = __STRING_SMALL_GET32 (src, 0); \
__u = __extension__ ((void *) __u + 4); \
__u->__uc = '\0'; \
break; \
case 6: \
__u->__ui = __STRING_SMALL_GET32 (src, 0); \
__u = __extension__ ((void *) __u + 4); \
__u->__usi = __STRING_SMALL_GET16 (src, 4); \
break; \
case 7: \
__u->__ui = __STRING_SMALL_GET32 (src, 0); \
__u = __extension__ ((void *) __u + 4); \
__u->__usi = __STRING_SMALL_GET16 (src, 4); \
__u = __extension__ ((void *) __u + 2); \
__u->__uc = '\0'; \
break; \
case 8: \
__u->__ui = __STRING_SMALL_GET32 (src, 0); \
__u = __extension__ ((void *) __u + 4); \
__u->__ui = __STRING_SMALL_GET32 (src, 4); \
break; \
} \
(char *) __dest; }))
__STRING_INLINE char *__strcpy_g (char *__dest, const char *__src);
__STRING_INLINE char *
__strcpy_g (char *__dest, const char *__src)
{
register char *__tmp = __dest;
register char __dummy;
__asm__ __volatile__
(
"1:\n\t"
"movb (%0),%b2\n\t"
"leal 1(%0),%0\n\t"
"movb %b2,(%1)\n\t"
"leal 1(%1),%1\n\t"
"testb %b2,%b2\n\t"
"jne 1b"
: "=&r" (__src), "=&r" (__tmp), "=&q" (__dummy),
"=m" ( *(struct { char __x[0xfffffff]; } *)__dest)
: "0" (__src), "1" (__tmp),
"m" ( *(struct { char __x[0xfffffff]; } *)__src)
: "cc");
return __dest;
}
# ifdef __USE_GNU
# define _HAVE_STRING_ARCH_stpcpy 1
/* Copy SRC to DEST. */
# 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) \
((srclen) % 4 == 0 \
? __mempcpy_by4 (dest, src, srclen) - 1 \
: ((srclen) % 2 == 0 \
? __mempcpy_by2 (dest, src, srclen) - 1 \
: __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_a_small(dest, src, srclen) \
(__extension__ ({ union { \
unsigned int __ui; \
unsigned short int __usi; \
unsigned char __uc; \
char __c; \
} *__u = (void *) (dest); \
switch (srclen) \
{ \
case 1: \
__u->__uc = '\0'; \
break; \
case 2: \
__u->__usi = __STRING_SMALL_GET16 (src, 0); \
__u = __extension__ ((void *) __u + 1); \
break; \
case 3: \
__u->__usi = __STRING_SMALL_GET16 (src, 0); \
__u = __extension__ ((void *) __u + 2); \
__u->__uc = '\0'; \
break; \
case 4: \
__u->__ui = __STRING_SMALL_GET32 (src, 0); \
__u = __extension__ ((void *) __u + 3); \
break; \
case 5: \
__u->__ui = __STRING_SMALL_GET32 (src, 0); \
__u = __extension__ ((void *) __u + 4); \
__u->__uc = '\0'; \
break; \
case 6: \
__u->__ui = __STRING_SMALL_GET32 (src, 0); \
__u = __extension__ ((void *) __u + 4); \
__u->__usi = __STRING_SMALL_GET16 (src, 4); \
__u = __extension__ ((void *) __u + 1); \
break; \
case 7: \
__u->__ui = __STRING_SMALL_GET32 (src, 0); \
__u = __extension__ ((void *) __u + 4); \
__u->__usi = __STRING_SMALL_GET16 (src, 4); \
__u = __extension__ ((void *) __u + 2); \
__u->__uc = '\0'; \
break; \
case 8: \
__u->__ui = __STRING_SMALL_GET32 (src, 0); \
__u = __extension__ ((void *) __u + 4); \
__u->__ui = __STRING_SMALL_GET32 (src, 4); \
__u = __extension__ ((void *) __u + 3); \
break; \
} \
(char *) __u; }))
__STRING_INLINE char *__mempcpy_by4 (char *__dest, const char *__src,
size_t __srclen);
__STRING_INLINE char *
__mempcpy_by4 (char *__dest, const char *__src, size_t __srclen)
{
register char *__tmp = __dest;
register unsigned long int __d0, __d1;
__asm__ __volatile__
("1:\n\t"
"movl (%2),%0\n\t"
"leal 4(%2),%2\n\t"
"movl %0,(%1)\n\t"
"leal 4(%1),%1\n\t"
"decl %3\n\t"
"jnz 1b"
: "=&r" (__d0), "=r" (__tmp), "=&r" (__src), "=&r" (__d1)
: "1" (__tmp), "2" (__src), "3" (__srclen / 4)
: "memory", "cc");
return __tmp;
}
__STRING_INLINE char *__mempcpy_by2 (char *__dest, const char *__src,
size_t __srclen);
__STRING_INLINE char *
__mempcpy_by2 (char *__dest, const char *__src, size_t __srclen)
{
register char *__tmp = __dest;
register unsigned long int __d0, __d1;
__asm__ __volatile__
("shrl $1,%3\n\t"
"jz 2f\n" /* only a word */
"1:\n\t"
"movl (%2),%0\n\t"
"leal 4(%2),%2\n\t"
"movl %0,(%1)\n\t"
"leal 4(%1),%1\n\t"
"decl %3\n\t"
"jnz 1b\n"
"2:\n\t"
"movw (%2),%w0\n\t"
"movw %w0,(%1)"
: "=&q" (__d0), "=r" (__tmp), "=&r" (__src), "=&r" (__d1),
"=m" ( *(struct { __extension__ char __x[__srclen]; } *)__dest)
: "1" (__tmp), "2" (__src), "3" (__srclen / 2),
"m" ( *(struct { __extension__ char __x[__srclen]; } *)__src)
: "cc");
return __tmp + 2;
}
__STRING_INLINE char *__mempcpy_byn (char *__dest, const char *__src,
size_t __srclen);
__STRING_INLINE char *
__mempcpy_byn (char *__dest, const char *__src, size_t __srclen)
{
register unsigned long __d0, __d1;
register char *__tmp = __dest;
__asm__ __volatile__
("cld\n\t"
"shrl $1,%%ecx\n\t"
"jnc 1f\n\t"
"movsb\n"
"1:\n\t"
"shrl $1,%%ecx\n\t"
"jnc 2f\n\t"
"movsw\n"
"2:\n\t"
"rep; movsl"
: "=D" (__tmp), "=&c" (__d0), "=&S" (__d1),
"=m" ( *(struct { __extension__ char __x[__srclen]; } *)__dest)
: "0" (__tmp), "1" (__srclen), "2" (__src),
"m" ( *(struct { __extension__ char __x[__srclen]; } *)__src)
: "cc");
return __tmp;
}
__STRING_INLINE char *__stpcpy_g (char *__dest, const char *__src);
__STRING_INLINE char *
__stpcpy_g (char *__dest, const char *__src)
{
register char *__tmp = __dest;
register char __dummy;
__asm__ __volatile__
(
"1:\n\t"
"movb (%0),%b2\n\t"
"leal 1(%0),%0\n\t"
"movb %b2,(%1)\n\t"
"leal 1(%1),%1\n\t"
"testb %b2,%b2\n\t"
"jne 1b"
: "=&r" (__src), "=r" (__tmp), "=&q" (__dummy),
"=m" ( *(struct { char __x[0xfffffff]; } *)__dest)
: "0" (__src), "1" (__tmp),
"m" ( *(struct { char __x[0xfffffff]; } *)__src)
: "cc");
return __tmp - 1;
}
# endif
/* Copy no more than N characters of SRC to DEST. */
# 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) \
(((srclen) % 4 == 0) \
? __strncpy_by4 (dest, src, srclen, n) \
: (((srclen) % 2 == 0) \
? __strncpy_by2 (dest, src, srclen, n) \
: __strncpy_byn (dest, src, srclen, n)))
__STRING_INLINE char *__strncpy_by4 (char *__dest, const char __src[],
size_t __srclen, size_t __n);
__STRING_INLINE char *
__strncpy_by4 (char *__dest, const char __src[], size_t __srclen, size_t __n)
{
register char *__tmp = __dest;
register int __dummy1, __dummy2;
__asm__ __volatile__
("1:\n\t"
"movl (%2),%0\n\t"
"leal 4(%2),%2\n\t"
"movl %0,(%1)\n\t"
"leal 4(%1),%1\n\t"
"decl %3\n\t"
"jnz 1b"
: "=&r" (__dummy1), "=r" (__tmp), "=&r" (__src), "=&r" (__dummy2),
"=m" ( *(struct { __extension__ char __x[__srclen]; } *)__dest)
: "1" (__tmp), "2" (__src), "3" (__srclen / 4),
"m" ( *(struct { __extension__ char __x[__srclen]; } *)__src)
: "cc");
(void) memset (__tmp, '\0', __n - __srclen);
return __dest;
}
__STRING_INLINE char *__strncpy_by2 (char *__dest, const char __src[],
size_t __srclen, size_t __n);
__STRING_INLINE char *
__strncpy_by2 (char *__dest, const char __src[], size_t __srclen, size_t __n)
{
register char *__tmp = __dest;
register int __dummy1, __dummy2;
__asm__ __volatile__
("shrl $1,%3\n\t"
"jz 2f\n" /* only a word */
"1:\n\t"
"movl (%2),%0\n\t"
"leal 4(%2),%2\n\t"
"movl %0,(%1)\n\t"
"leal 4(%1),%1\n\t"
"decl %3\n\t"
"jnz 1b\n"
"2:\n\t"
"movw (%2),%w0\n\t"
"movw %w0,(%1)\n\t"
: "=&q" (__dummy1), "=r" (__tmp), "=&r" (__src), "=&r" (__dummy2),
"=m" ( *(struct { __extension__ char __x[__srclen]; } *)__dest)
: "1" (__tmp), "2" (__src), "3" (__srclen / 2),
"m" ( *(struct { __extension__ char __x[__srclen]; } *)__src)
: "cc");
(void) memset (__tmp + 2, '\0', __n - __srclen);
return __dest;
}
__STRING_INLINE char *__strncpy_byn (char *__dest, const char __src[],
size_t __srclen, size_t __n);
__STRING_INLINE char *
__strncpy_byn (char *__dest, const char __src[], size_t __srclen, size_t __n)
{
register unsigned long int __d0, __d1;
register char *__tmp = __dest;
__asm__ __volatile__
("cld\n\t"
"shrl $1,%1\n\t"
"jnc 1f\n\t"
"movsb\n"
"1:\n\t"
"shrl $1,%1\n\t"
"jnc 2f\n\t"
"movsw\n"
"2:\n\t"
"rep; movsl"
: "=D" (__tmp), "=&c" (__d0), "=&S" (__d1),
"=m" ( *(struct { __extension__ char __x[__srclen]; } *)__dest)
: "1" (__srclen), "0" (__tmp),"2" (__src),
"m" ( *(struct { __extension__ char __x[__srclen]; } *)__src)
: "cc");
(void) memset (__tmp, '\0', __n - __srclen);
return __dest;
}
__STRING_INLINE char *__strncpy_gg (char *__dest, const char *__src,
size_t __n);
__STRING_INLINE char *
__strncpy_gg (char *__dest, const char *__src, size_t __n)
{
register char *__tmp = __dest;
register char __dummy;
if (__n > 0)
__asm__ __volatile__
("1:\n\t"
"movb (%0),%2\n\t"
"incl %0\n\t"
"movb %2,(%1)\n\t"
"incl %1\n\t"
"decl %3\n\t"
"je 3f\n\t"
"testb %2,%2\n\t"
"jne 1b\n\t"
"2:\n\t"
"movb %2,(%1)\n\t"
"incl %1\n\t"
"decl %3\n\t"
"jne 2b\n\t"
"3:"
: "=&r" (__src), "=&r" (__tmp), "=&q" (__dummy), "=&r" (__n)
: "0" (__src), "1" (__tmp), "3" (__n)
: "memory", "cc");
return __dest;
}
/* Append SRC onto DEST. */
# 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);
__STRING_INLINE char *
__strcat_c (char *__dest, const char __src[], size_t __srclen)
{
# ifdef __i686__
register unsigned long int __d0;
register char *__tmp;
__asm__ __volatile__
("repne; scasb"
: "=D" (__tmp), "=&c" (__d0),
"=m" ( *(struct { char __x[0xfffffff]; } *)__dest)
: "0" (__dest), "1" (0xffffffff), "a" (0),
"m" ( *(struct { __extension__ char __x[__srclen]; } *)__src)
: "cc");
--__tmp;
# else
register char *__tmp = __dest;
__asm__ __volatile__
("decl %0\n\t"
"1:\n\t"
"incl %0\n\t"
"cmpb $0,(%0)\n\t"
"jne 1b\n"
: "=r" (__tmp),
"=m" ( *(struct { char __x[0xfffffff]; } *)__dest)
: "0" (__tmp),
"m" ( *(struct { __extension__ char __x[__srclen]; } *)__src)
: "cc");
# endif
(void) memcpy (__tmp, __src, __srclen);
return __dest;
}
__STRING_INLINE char *__strcat_g (char *__dest, const char *__src);
__STRING_INLINE char *
__strcat_g (char *__dest, const char *__src)
{
register char *__tmp = __dest;
register char __dummy;
__asm__ __volatile__
("decl %1\n\t"
"1:\n\t"
"incl %1\n\t"
"cmpb $0,(%1)\n\t"
"jne 1b\n"
"2:\n\t"
"movb (%2),%b0\n\t"
"incl %2\n\t"
"movb %b0,(%1)\n\t"
"incl %1\n\t"
"testb %b0,%b0\n\t"
"jne 2b\n"
: "=&q" (__dummy), "=&r" (__tmp), "=&r" (__src),
"=m" ( *(struct { char __x[0xfffffff]; } *)__dest)
: "1" (__tmp), "2" (__src),
"m" ( *(struct { char __x[0xfffffff]; } *)__src)
: "memory", "cc");
return __dest;
}
/* Append no more than N characters from SRC onto DEST. */
# 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)) \
? strcat (__dest, (src)) \
: (*(char *)__mempcpy (strchr (__dest, '\0'), \
(const char *) (src), \
(n)) = 0, __dest)) \
: __strncat_g (__dest, (src), (n)); }))
__STRING_INLINE char *__strncat_g (char *__dest, const char __src[],
size_t __n);
__STRING_INLINE char *
__strncat_g (char *__dest, const char __src[], size_t __n)
{
register char *__tmp = __dest;
register char __dummy;
# ifdef __i686__
__asm__ __volatile__
("repne; scasb\n"
"movl %4, %3\n\t"
"decl %1\n\t"
"1:\n\t"
"subl $1,%3\n\t"
"jc 2f\n\t"
"movb (%2),%b0\n\t"
"movsb\n\t"
"testb %b0,%b0\n\t"
"jne 1b\n\t"
"decl %1\n"
"2:\n\t"
"movb $0,(%1)"
: "=&a" (__dummy), "=&D" (__tmp), "=&S" (__src), "=&c" (__n)
: "g" (__n), "0" (0), "1" (__tmp), "2" (__src), "3" (0xffffffff)
: "memory", "cc");
# else
--__tmp;
__asm__ __volatile__
("1:\n\t"
"cmpb $0,1(%1)\n\t"
"leal 1(%1),%1\n\t"
"jne 1b\n"
"2:\n\t"
"subl $1,%3\n\t"
"jc 3f\n\t"
"movb (%2),%b0\n\t"
"leal 1(%2),%2\n\t"
"movb %b0,(%1)\n\t"
"leal 1(%1),%1\n\t"
"testb %b0,%b0\n\t"
"jne 2b\n\t"
"decl %1\n"
"3:\n\t"
"movb $0,(%1)"
: "=&q" (__dummy), "=&r" (__tmp), "=&r" (__src), "=&r" (__n)
: "1" (__tmp), "2" (__src), "3" (__n)
: "memory", "cc");
#endif
return __dest;
}
/* Compare S1 and 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) \
? memcmp ((const char *) (s1), (const char *) (s2), \
(strlen (s1) < strlen (s2) \
? strlen (s1) : strlen (s2)) + 1) \
: (__builtin_constant_p (s1) && sizeof ((s1)[0]) == 1 \
&& sizeof ((s2)[0]) == 1 && strlen (s1) < 4 \
? (__builtin_constant_p (s2) && sizeof ((s2)[0]) == 1 \
? __strcmp_cc ((const unsigned char *) (s1), \
(const unsigned char *) (s2), \
strlen (s1)) \
: __strcmp_cg ((const unsigned char *) (s1), \
(const unsigned char *) (s2), \
strlen (s1))) \
: (__builtin_constant_p (s2) && sizeof ((s1)[0]) == 1 \
&& sizeof ((s2)[0]) == 1 && strlen (s2) < 4 \
? (__builtin_constant_p (s1) \
? __strcmp_cc ((const unsigned char *) (s1), \
(const unsigned char *) (s2), \
strlen (s2)) \
: __strcmp_gc ((const unsigned char *) (s1), \
(const unsigned char *) (s2), \
strlen (s2))) \
: __strcmp_gg ((s1), (s2))))))
# define __strcmp_cc(s1, s2, l) \
(__extension__ ({ register int __result = (s1)[0] - (s2)[0]; \
if (l > 0 && __result == 0) \
{ \
__result = (s1)[1] - (s2)[1]; \
if (l > 1 && __result == 0) \
{ \
__result = (s1)[2] - (s2)[2]; \
if (l > 2 && __result == 0) \
__result = (s1)[3] - (s2)[3]; \
} \
} \
__result; }))
# 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 = (s1)[1] - __s2[1]; \
if (l1 > 1 && __result == 0) \
{ \
__result = (s1)[2] - __s2[2]; \
if (l1 > 2 && __result == 0) \
__result = (s1)[3] - __s2[3]; \
} \
} \
__result; }))
# define __strcmp_gc(s1, s2, l2) \
(__extension__ ({ const unsigned char *__s1 = (s1); \
register int __result = __s1[0] - (s2)[0]; \
if (l2 > 0 && __result == 0) \
{ \
__result = __s1[1] - (s2)[1]; \
if (l2 > 1 && __result == 0) \
{ \
__result = __s1[2] - (s2)[2]; \
if (l2 > 2 && __result == 0) \
__result = __s1[3] - (s2)[3]; \
} \
} \
__result; }))
__STRING_INLINE int __strcmp_gg (const char *__s1, const char *__s2);
__STRING_INLINE int
__strcmp_gg (const char *__s1, const char *__s2)
{
register int __res;
__asm__ __volatile__
("1:\n\t"
"movb (%1),%b0\n\t"
"leal 1(%1),%1\n\t"
"cmpb %b0,(%2)\n\t"
"jne 2f\n\t"
"leal 1(%2),%2\n\t"
"testb %b0,%b0\n\t"
"jne 1b\n\t"
"xorl %0,%0\n\t"
"jmp 3f\n"
"2:\n\t"
"movl $1,%0\n\t"
"jb 3f\n\t"
"negl %0\n"
"3:"
: "=q" (__res), "=&r" (__s1), "=&r" (__s2)
: "1" (__s1), "2" (__s2),
"m" ( *(struct { char __x[0xfffffff]; } *)__s1),
"m" ( *(struct { char __x[0xfffffff]; } *)__s2)
: "cc");
return __res;
}
/* Compare N characters of S1 and S2. */
# 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))\
? strcmp ((s1), (s2)) \
: __strncmp_g ((s1), (s2), (n)))))
__STRING_INLINE int __strncmp_g (const char *__s1, const char *__s2,
size_t __n);
__STRING_INLINE int
__strncmp_g (const char *__s1, const char *__s2, size_t __n)
{
register int __res;
__asm__ __volatile__
("1:\n\t"
"subl $1,%3\n\t"
"jc 2f\n\t"
"movb (%1),%b0\n\t"
"incl %1\n\t"
"cmpb %b0,(%2)\n\t"
"jne 3f\n\t"
"incl %2\n\t"
"testb %b0,%b0\n\t"
"jne 1b\n"
"2:\n\t"
"xorl %0,%0\n\t"
"jmp 4f\n"
"3:\n\t"
"movl $1,%0\n\t"
"jb 4f\n\t"
"negl %0\n"
"4:"
: "=q" (__res), "=&r" (__s1), "=&r" (__s2), "=&r" (__n)
: "1" (__s1), "2" (__s2), "3" (__n),
"m" ( *(struct { __extension__ char __x[__n]; } *)__s1),
"m" ( *(struct { __extension__ char __x[__n]; } *)__s2)
: "cc");
return __res;
}
/* Find the first occurrence of C in S. */
# 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)) \
: __strchr_c ((s), ((c) & 0xff) << 8)) \
: __strchr_g ((s), (c))))
__STRING_INLINE char *__strchr_c (const char *__s, int __c);
__STRING_INLINE char *
__strchr_c (const char *__s, int __c)
{
register unsigned long int __d0;
register char *__res;
__asm__ __volatile__
("1:\n\t"
"movb (%0),%%al\n\t"
"cmpb %%ah,%%al\n\t"
"je 2f\n\t"
"leal 1(%0),%0\n\t"
"testb %%al,%%al\n\t"
"jne 1b\n\t"
"xorl %0,%0\n"
"2:"
: "=r" (__res), "=&a" (__d0)
: "0" (__s), "1" (__c),
"m" ( *(struct { char __x[0xfffffff]; } *)__s)
: "cc");
return __res;
}
__STRING_INLINE char *__strchr_g (const char *__s, int __c);
__STRING_INLINE char *
__strchr_g (const char *__s, int __c)
{
register unsigned long int __d0;
register char *__res;
__asm__ __volatile__
("movb %%al,%%ah\n"
"1:\n\t"
"movb (%0),%%al\n\t"
"cmpb %%ah,%%al\n\t"
"je 2f\n\t"
"leal 1(%0),%0\n\t"
"testb %%al,%%al\n\t"
"jne 1b\n\t"
"xorl %0,%0\n"
"2:"
: "=r" (__res), "=&a" (__d0)
: "0" (__s), "1" (__c),
"m" ( *(struct { char __x[0xfffffff]; } *)__s)
: "cc");
return __res;
}
/* Find the first occurrence of C in S or the final NUL byte. */
# define _HAVE_STRING_ARCH_strchrnul 1
# define __strchrnul(s, c) \
(__extension__ (__builtin_constant_p (c) \
? ((c) == '\0' \
? (char *) __rawmemchr ((s), c) \
: __strchrnul_c ((s), ((c) & 0xff) << 8)) \
: __strchrnul_g ((s), c)))
__STRING_INLINE char *__strchrnul_c (const char *__s, int __c);
__STRING_INLINE char *
__strchrnul_c (const char *__s, int __c)
{
register unsigned long int __d0;
register char *__res;
__asm__ __volatile__
("1:\n\t"
"movb (%0),%%al\n\t"
"cmpb %%ah,%%al\n\t"
"je 2f\n\t"
"leal 1(%0),%0\n\t"
"testb %%al,%%al\n\t"
"jne 1b\n\t"
"decl %0\n"
"2:"
: "=r" (__res), "=&a" (__d0)
: "0" (__s), "1" (__c),
"m" ( *(struct { char __x[0xfffffff]; } *)__s)
: "cc");
return __res;
}
__STRING_INLINE char *__strchrnul_g (const char *__s, int __c);
__STRING_INLINE char *
__strchrnul_g (const char *__s, int __c)
{
register unsigned long int __d0;
register char *__res;
__asm__ __volatile__
("movb %%al,%%ah\n"
"1:\n\t"
"movb (%0),%%al\n\t"
"cmpb %%ah,%%al\n\t"
"je 2f\n\t"
"leal 1(%0),%0\n\t"
"testb %%al,%%al\n\t"
"jne 1b\n\t"
"decl %0\n"
"2:"
: "=r" (__res), "=&a" (__d0)
: "0" (__s), "1" (__c),
"m" ( *(struct { char __x[0xfffffff]; } *)__s)
: "cc");
return __res;
}
# ifdef __USE_GNU
# define strchrnul(s, c) __strchrnul ((s), (c))
# endif
# if defined __USE_MISC || 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) \
(__extension__ (__builtin_constant_p (c) \
? __strchr_c ((s), ((c) & 0xff) << 8) \
: __strchr_g ((s), (c))))
# endif
/* Find the last occurrence of C in S. */
# 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__
__STRING_INLINE char *__strrchr_c (const char *__s, int __c);
__STRING_INLINE char *
__strrchr_c (const char *__s, int __c)
{
register unsigned long int __d0, __d1;
register char *__res;
__asm__ __volatile__
("cld\n"
"1:\n\t"
"lodsb\n\t"
"cmpb %h2,%b2\n\t"
"cmove %1,%0\n\t"
"testb %b2,%b2\n\t"
"jne 1b"
: "=d" (__res), "=&S" (__d0), "=&a" (__d1)
: "0" (1), "1" (__s), "2" (__c),
"m" ( *(struct { char __x[0xfffffff]; } *)__s)
: "cc");
return __res - 1;
}
__STRING_INLINE char *__strrchr_g (const char *__s, int __c);
__STRING_INLINE char *
__strrchr_g (const char *__s, int __c)
{
register unsigned long int __d0, __d1;
register char *__res;
__asm__ __volatile__
("movb %b2,%h2\n"
"cld\n\t"
"1:\n\t"
"lodsb\n\t"
"cmpb %h2,%b2\n\t"
"cmove %1,%0\n\t"
"testb %b2,%b2\n\t"
"jne 1b"
: "=d" (__res), "=&S" (__d0), "=&a" (__d1)
: "0" (1), "1" (__s), "2" (__c),
"m" ( *(struct { char __x[0xfffffff]; } *)__s)
: "cc");
return __res - 1;
}
# else
__STRING_INLINE char *__strrchr_c (const char *__s, int __c);
__STRING_INLINE char *
__strrchr_c (const char *__s, int __c)
{
register unsigned long int __d0, __d1;
register char *__res;
__asm__ __volatile__
("cld\n"
"1:\n\t"
"lodsb\n\t"
"cmpb %%ah,%%al\n\t"
"jne 2f\n\t"
"leal -1(%%esi),%0\n"
"2:\n\t"
"testb %%al,%%al\n\t"
"jne 1b"
: "=d" (__res), "=&S" (__d0), "=&a" (__d1)
: "0" (0), "1" (__s), "2" (__c),
"m" ( *(struct { char __x[0xfffffff]; } *)__s)
: "cc");
return __res;
}
__STRING_INLINE char *__strrchr_g (const char *__s, int __c);
__STRING_INLINE char *
__strrchr_g (const char *__s, int __c)
{
register unsigned long int __d0, __d1;
register char *__res;
__asm__ __volatile__
("movb %%al,%%ah\n"
"cld\n\t"
"1:\n\t"
"lodsb\n\t"
"cmpb %%ah,%%al\n\t"
"jne 2f\n\t"
"leal -1(%%esi),%0\n"
"2:\n\t"
"testb %%al,%%al\n\t"
"jne 1b"
: "=r" (__res), "=&S" (__d0), "=&a" (__d1)
: "0" (0), "1" (__s), "2" (__c),
"m" ( *(struct { char __x[0xfffffff]; } *)__s)
: "cc");
return __res;
}
# endif
# if defined __USE_MISC || 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) \
(__extension__ (__builtin_constant_p (c) \
? __strrchr_c ((s), ((c) & 0xff) << 8) \
: __strrchr_g ((s), (c))))
# 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) \
(__extension__ (__builtin_constant_p (reject) && sizeof ((reject)[0]) == 1 \
? ((reject)[0] == '\0' \
? strlen (s) \
: ((reject)[1] == '\0' \
? __strcspn_c1 ((s), (((reject)[0] << 8) & 0xff00)) \
: __strcspn_cg ((s), (reject), strlen (reject)))) \
: __strcspn_g ((s), (reject))))
__STRING_INLINE size_t __strcspn_c1 (const char *__s, int __reject);
# ifndef _FORCE_INLINES
__STRING_INLINE size_t
__strcspn_c1 (const char *__s, int __reject)
{
register unsigned long int __d0;
register char *__res;
__asm__ __volatile__
("1:\n\t"
"movb (%0),%%al\n\t"
"leal 1(%0),%0\n\t"
"cmpb %%ah,%%al\n\t"
"je 2f\n\t"
"testb %%al,%%al\n\t"
"jne 1b\n"
"2:"
: "=r" (__res), "=&a" (__d0)
: "0" (__s), "1" (__reject),
"m" ( *(struct { char __x[0xfffffff]; } *)__s)
: "cc");
return (__res - 1) - __s;
}
# endif
__STRING_INLINE size_t __strcspn_cg (const char *__s, const char __reject[],
size_t __reject_len);
__STRING_INLINE size_t
__strcspn_cg (const char *__s, const char __reject[], size_t __reject_len)
{
register unsigned long int __d0, __d1, __d2;
register const char *__res;
__asm__ __volatile__
("cld\n"
"1:\n\t"
"lodsb\n\t"
"testb %%al,%%al\n\t"
"je 2f\n\t"
"movl %5,%%edi\n\t"
"movl %6,%%ecx\n\t"
"repne; scasb\n\t"
"jne 1b\n"
"2:"
: "=S" (__res), "=&a" (__d0), "=&c" (__d1), "=&D" (__d2)
: "0" (__s), "d" (__reject), "g" (__reject_len)
: "memory", "cc");
return (__res - 1) - __s;
}
__STRING_INLINE size_t __strcspn_g (const char *__s, const char *__reject);
# ifdef __PIC__
__STRING_INLINE size_t
__strcspn_g (const char *__s, const char *__reject)
{
register unsigned long int __d0, __d1, __d2;
register const char *__res;
__asm__ __volatile__
("pushl %%ebx\n\t"
"movl %4,%%edi\n\t"
"cld\n\t"
"repne; scasb\n\t"
"notl %%ecx\n\t"
"leal -1(%%ecx),%%ebx\n"
"1:\n\t"
"lodsb\n\t"
"testb %%al,%%al\n\t"
"je 2f\n\t"
"movl %4,%%edi\n\t"
"movl %%ebx,%%ecx\n\t"
"repne; scasb\n\t"
"jne 1b\n"
"2:\n\t"
"popl %%ebx"
: "=S" (__res), "=&a" (__d0), "=&c" (__d1), "=&D" (__d2)
: "r" (__reject), "0" (__s), "1" (0), "2" (0xffffffff)
: "memory", "cc");
return (__res - 1) - __s;
}
# else
__STRING_INLINE size_t
__strcspn_g (const char *__s, const char *__reject)
{
register unsigned long int __d0, __d1, __d2, __d3;
register const char *__res;
__asm__ __volatile__
("cld\n\t"
"repne; scasb\n\t"
"notl %%ecx\n\t"
"leal -1(%%ecx),%%edx\n"
"1:\n\t"
"lodsb\n\t"
"testb %%al,%%al\n\t"
"je 2f\n\t"
"movl %%ebx,%%edi\n\t"
"movl %%edx,%%ecx\n\t"
"repne; scasb\n\t"
"jne 1b\n"
"2:"
: "=S" (__res), "=&a" (__d0), "=&c" (__d1), "=&D" (__d2), "=&d" (__d3)
: "0" (__s), "1" (0), "2" (0xffffffff), "3" (__reject), "b" (__reject)
/* Clobber memory, otherwise GCC cannot handle this. */
: "memory", "cc");
return (__res - 1) - __s;
}
# 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) \
(__extension__ (__builtin_constant_p (accept) && sizeof ((accept)[0]) == 1 \
? ((accept)[0] == '\0' \
? ((void) (s), 0) \
: ((accept)[1] == '\0' \
? __strspn_c1 ((s), (((accept)[0] << 8 ) & 0xff00)) \
: __strspn_cg ((s), (accept), strlen (accept)))) \
: __strspn_g ((s), (accept))))
# ifndef _FORCE_INLINES
__STRING_INLINE size_t __strspn_c1 (const char *__s, int __accept);
__STRING_INLINE size_t
__strspn_c1 (const char *__s, int __accept)
{
register unsigned long int __d0;
register char *__res;
/* Please note that __accept never can be '\0'. */
__asm__ __volatile__
("1:\n\t"
"movb (%0),%b1\n\t"
"leal 1(%0),%0\n\t"
"cmpb %h1,%b1\n\t"
"je 1b"
: "=r" (__res), "=&q" (__d0)
: "0" (__s), "1" (__accept),
"m" ( *(struct { char __x[0xfffffff]; } *)__s)
: "cc");
return (__res - 1) - __s;
}
# endif
__STRING_INLINE size_t __strspn_cg (const char *__s, const char __accept[],
size_t __accept_len);
__STRING_INLINE size_t
__strspn_cg (const char *__s, const char __accept[], size_t __accept_len)
{
register unsigned long int __d0, __d1, __d2;
register const char *__res;
__asm__ __volatile__
("cld\n"
"1:\n\t"
"lodsb\n\t"
"testb %%al,%%al\n\t"
"je 2f\n\t"
"movl %5,%%edi\n\t"
"movl %6,%%ecx\n\t"
"repne; scasb\n\t"
"je 1b\n"
"2:"
: "=S" (__res), "=&a" (__d0), "=&c" (__d1), "=&D" (__d2)
: "0" (__s), "g" (__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");
return (__res - 1) - __s;
}
__STRING_INLINE size_t __strspn_g (const char *__s, const char *__accept);
# ifdef __PIC__
__STRING_INLINE size_t
__strspn_g (const char *__s, const char *__accept)
{
register unsigned long int __d0, __d1, __d2;
register const char *__res;
__asm__ __volatile__
("pushl %%ebx\n\t"
"cld\n\t"
"repne; scasb\n\t"
"notl %%ecx\n\t"
"leal -1(%%ecx),%%ebx\n"
"1:\n\t"
"lodsb\n\t"
"testb %%al,%%al\n\t"
"je 2f\n\t"
"movl %%edx,%%edi\n\t"
"movl %%ebx,%%ecx\n\t"
"repne; scasb\n\t"
"je 1b\n"
"2:\n\t"
"popl %%ebx"
: "=S" (__res), "=&a" (__d0), "=&c" (__d1), "=&D" (__d2)
: "d" (__accept), "0" (__s), "1" (0), "2" (0xffffffff), "3" (__accept)
: "memory", "cc");
return (__res - 1) - __s;
}
# else
__STRING_INLINE size_t
__strspn_g (const char *__s, const char *__accept)
{
register unsigned long int __d0, __d1, __d2, __d3;
register const char *__res;
__asm__ __volatile__
("cld\n\t"
"repne; scasb\n\t"
"notl %%ecx\n\t"
"leal -1(%%ecx),%%edx\n"
"1:\n\t"
"lodsb\n\t"
"testb %%al,%%al\n\t"
"je 2f\n\t"
"movl %%ebx,%%edi\n\t"
"movl %%edx,%%ecx\n\t"
"repne; scasb\n\t"
"je 1b\n"
"2:"
: "=S" (__res), "=&a" (__d0), "=&c" (__d1), "=&D" (__d2), "=&d" (__d3)
: "0" (__s), "1" (0), "2" (0xffffffff), "3" (__accept), "b" (__accept)
: "memory", "cc");
return (__res - 1) - __s;
}
# endif
/* Find the first occurrence in S of any character in 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) \
: ((accept)[1] == '\0' \
? strchr ((s), (accept)[0]) \
: __strpbrk_cg ((s), (accept), strlen (accept)))) \
: __strpbrk_g ((s), (accept))))
__STRING_INLINE char *__strpbrk_cg (const char *__s, const char __accept[],
size_t __accept_len);
__STRING_INLINE char *
__strpbrk_cg (const char *__s, const char __accept[], size_t __accept_len)
{
register unsigned long int __d0, __d1, __d2;
register char *__res;
__asm__ __volatile__
("cld\n"
"1:\n\t"
"lodsb\n\t"
"testb %%al,%%al\n\t"
"je 2f\n\t"
"movl %5,%%edi\n\t"
"movl %6,%%ecx\n\t"
"repne; scasb\n\t"
"jne 1b\n\t"
"decl %0\n\t"
"jmp 3f\n"
"2:\n\t"
"xorl %0,%0\n"
"3:"
: "=S" (__res), "=&a" (__d0), "=&c" (__d1), "=&D" (__d2)
: "0" (__s), "d" (__accept), "g" (__accept_len)
: "memory", "cc");
return __res;
}
__STRING_INLINE char *__strpbrk_g (const char *__s, const char *__accept);
# ifdef __PIC__
__STRING_INLINE char *
__strpbrk_g (const char *__s, const char *__accept)
{
register unsigned long int __d0, __d1, __d2;
register char *__res;
__asm__ __volatile__
("pushl %%ebx\n\t"
"movl %%edx,%%edi\n\t"
"cld\n\t"
"repne; scasb\n\t"
"notl %%ecx\n\t"
"leal -1(%%ecx),%%ebx\n"
"1:\n\t"
"lodsb\n\t"
"testb %%al,%%al\n\t"
"je 2f\n\t"
"movl %%edx,%%edi\n\t"
"movl %%ebx,%%ecx\n\t"
"repne; scasb\n\t"
"jne 1b\n\t"
"decl %0\n\t"
"jmp 3f\n"
"2:\n\t"
"xorl %0,%0\n"
"3:\n\t"
"popl %%ebx"
: "=S" (__res), "=&a" (__d0), "=&c" (__d1), "=&D" (__d2)
: "d" (__accept), "0" (__s), "1" (0), "2" (0xffffffff)
: "memory", "cc");
return __res;
}
# else
__STRING_INLINE char *
__strpbrk_g (const char *__s, const char *__accept)
{
register unsigned long int __d0, __d1, __d2, __d3;
register char *__res;
__asm__ __volatile__
("movl %%ebx,%%edi\n\t"
"cld\n\t"
"repne; scasb\n\t"
"notl %%ecx\n\t"
"leal -1(%%ecx),%%edx\n"
"1:\n\t"
"lodsb\n\t"
"testb %%al,%%al\n\t"
"je 2f\n\t"
"movl %%ebx,%%edi\n\t"
"movl %%edx,%%ecx\n\t"
"repne; scasb\n\t"
"jne 1b\n\t"
"decl %0\n\t"
"jmp 3f\n"
"2:\n\t"
"xorl %0,%0\n"
"3:"
: "=S" (__res), "=&a" (__d0), "=&c" (__d1), "=&d" (__d2), "=&D" (__d3)
: "0" (__s), "1" (0), "2" (0xffffffff), "b" (__accept)
: "memory", "cc");
return __res;
}
# endif
/* Find the first occurrence of NEEDLE in HAYSTACK. */
# define _HAVE_STRING_ARCH_strstr 1
# define strstr(haystack, needle) \
(__extension__ (__builtin_constant_p (needle) && sizeof ((needle)[0]) == 1 \
? ((needle)[0] == '\0' \
? (haystack) \
: ((needle)[1] == '\0' \
? strchr ((haystack), (needle)[0]) \
: __strstr_cg ((haystack), (needle), \
strlen (needle)))) \
: __strstr_g ((haystack), (needle))))
/* Please note that this function need not handle NEEDLEs with a
length shorter than two. */
__STRING_INLINE char *__strstr_cg (const char *__haystack,
const char __needle[],
size_t __needle_len);
__STRING_INLINE char *
__strstr_cg (const char *__haystack, const char __needle[],
size_t __needle_len)
{
register unsigned long int __d0, __d1, __d2;
register char *__res;
__asm__ __volatile__
("cld\n" \
"1:\n\t"
"movl %6,%%edi\n\t"
"movl %5,%%eax\n\t"
"movl %4,%%ecx\n\t"
"repe; cmpsb\n\t"
"je 2f\n\t"
"cmpb $0,-1(%%esi)\n\t"
"leal 1(%%eax),%5\n\t"
"jne 1b\n\t"
"xorl %%eax,%%eax\n"
"2:"
: "=&a" (__res), "=&S" (__d0), "=&D" (__d1), "=&c" (__d2)
: "g" (__needle_len), "1" (__haystack), "d" (__needle)
: "memory", "cc");
return __res;
}
__STRING_INLINE char *__strstr_g (const char *__haystack,
const char *__needle);
# ifdef __PIC__
__STRING_INLINE char *
__strstr_g (const char *__haystack, const char *__needle)
{
register unsigned long int __d0, __d1, __d2;
register char *__res;
__asm__ __volatile__
("cld\n\t"
"repne; scasb\n\t"
"notl %%ecx\n\t"
"pushl %%ebx\n\t"
"decl %%ecx\n\t" /* NOTE! This also sets Z if searchstring='' */
"movl %%ecx,%%ebx\n"
"1:\n\t"
"movl %%edx,%%edi\n\t"
"movl %%esi,%%eax\n\t"
"movl %%ebx,%%ecx\n\t"
"repe; cmpsb\n\t"
"je 2f\n\t" /* also works for empty string, see above */
"cmpb $0,-1(%%esi)\n\t"
"leal 1(%%eax),%%esi\n\t"
"jne 1b\n\t"
"xorl %%eax,%%eax\n"
"2:\n\t"
"popl %%ebx"
: "=&a" (__res), "=&c" (__d0), "=&S" (__d1), "=&D" (__d2)
: "0" (0), "1" (0xffffffff), "2" (__haystack), "3" (__needle),
"d" (__needle)
: "memory", "cc");
return __res;
}
# else
__STRING_INLINE char *
__strstr_g (const char *__haystack, const char *__needle)
{
register unsigned long int __d0, __d1, __d2, __d3;
register char *__res;
__asm__ __volatile__
("cld\n\t"
"repne; scasb\n\t"
"notl %%ecx\n\t"
"decl %%ecx\n\t" /* NOTE! This also sets Z if searchstring='' */
"movl %%ecx,%%edx\n"
"1:\n\t"
"movl %%ebx,%%edi\n\t"
"movl %%esi,%%eax\n\t"
"movl %%edx,%%ecx\n\t"
"repe; cmpsb\n\t"
"je 2f\n\t" /* also works for empty string, see above */
"cmpb $0,-1(%%esi)\n\t"
"leal 1(%%eax),%%esi\n\t"
"jne 1b\n\t"
"xorl %%eax,%%eax\n"
"2:"
: "=&a" (__res), "=&c" (__d0), "=&S" (__d1), "=&D" (__d2), "=&d" (__d3)
: "0" (0), "1" (0xffffffff), "2" (__haystack), "3" (__needle),
"b" (__needle)
: "memory", "cc");
return __res;
}
# endif
/* Bit find functions. We define only the i686 version since for the other
processors gcc generates good code. */
# if defined __USE_MISC || 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 /* Misc || X/Open */
# ifndef _FORCE_INLINES
# undef __STRING_INLINE
# endif
# endif /* use string inlines && GNU CC */
#endif
Reference in New Issue View Git Blame Copy Permalink