diff options
Diffstat (limited to 'sysdeps/arm/bits')
| -rw-r--r-- | sysdeps/arm/bits/string.h | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/sysdeps/arm/bits/string.h b/sysdeps/arm/bits/string.h new file mode 100644 index 0000000000..8dce456f39 --- /dev/null +++ b/sysdeps/arm/bits/string.h @@ -0,0 +1,150 @@ +/* Optimized, inlined string functions. ARM version. + Copyright (C) 1998 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#ifndef _STRING_H +# error "Never use <bits/string.h> directly; include <string.h> instead." +#endif + +/* We must defeat the generic optimized versions of these functions in + <bits/string2.h> since they don't work on the ARM. */ +#define _HAVE_STRING_ARCH_strcpy 1 +#define _HAVE_STRING_ARCH_stpcpy 1 + +/* We only provide optimizations if GNU CC is used and this is a little + endian system (the code below does not work on big endian machines). + With current versions of GCC these optimi\ations produce quite a large + amount of code so we only enable them if the user specifically asked + for it. */ +#if !defined __NO_STRING_INLINES && defined __GNUC__ && __GNUC__ >= 2 \ + && !defined __ARMEB__ && defined __USE_STRING_INLINES + +/* Copy SRC to DEST. */ +#define strcpy(dest, src) \ + (__extension__ (__builtin_constant_p (src) \ + ? (__string2_1bptr_p (src) && strlen (src) + 1 <= 8 \ + ? __strcpy_small (dest, src, strlen (src) + 1) \ + : (char *) memcpy (dest, src, strlen (src) + 1)) \ + : strcpy (dest, src))) + +#define __strcpy_small(dest, src, srclen) \ + (__extension__ ({ char *__dest = (char *) (dest); \ + const char *__src = (const char *) (src); \ + size_t __srclen = (srclen); \ + switch (__srclen) \ + { \ + case 5: \ + *((unsigned long int *) __dest) = \ + *((const unsigned long int *) (__src)); \ + __dest += 4; \ + __src += 4; \ + case 1: \ + *__dest++ = '\0'; \ + break; \ + case 6: \ + *((unsigned long int *) __dest) = \ + *((const unsigned long int *) (__src)); \ + __dest += 4; \ + __src += 4; \ + case 2: \ + *((unsigned short int *) __dest) = \ + __src[0]; \ + __dest += 2; \ + break; \ + case 7: \ + *((unsigned long int *) __dest) = \ + *((const unsigned long int *) (__src)); \ + __dest += 4; \ + __src += 4; \ + case 3: \ + *((unsigned short int *) __dest) = \ + *((const unsigned short int *) (__src)); \ + __dest[2] = '\0'; \ + __dest += 3; \ + break; \ + case 8: \ + *((unsigned long int *) __dest) = \ + *((const unsigned long int *) (__src)); \ + __dest += 4; \ + __src += 4; \ + case 4: \ + *((unsigned long int *) __dest) = \ + *((const unsigned short int *) (__src)) | \ + (__src[2] << 16); \ + __dest += 4; \ + break; \ + } \ + (__dest - __srclen) ; })) + +/* Copy SRC to DEST, returning pointer to final NUL byte. */ +#define __stpcpy(dest, src) \ + (__extension__ (__builtin_constant_p (src) \ + ? (__string2_1bptr_p (src) && strlen (src) + 1 <= 8 \ + ? __stpcpy_small (dest, src, strlen (src) + 1) \ + : ((char *) __mempcpy (dest, src, strlen (src) + 1) - 1))\ + : __stpcpy (dest, src))) + +#define __stpcpy_small(dest, src, srclen) \ + (__extension__ ({ char *__dest = (char *) (dest); \ + const char *__src = (const char *) (src); \ + switch (srclen) \ + { \ + case 5: \ + *((unsigned long int *) __dest) = \ + *((const unsigned long int *) (__src)); \ + __dest += 4; \ + __src += 4; \ + case 1: \ + *__dest++ = '\0'; \ + break; \ + case 6: \ + *((unsigned long int *) __dest) = \ + *((const unsigned long int *) (__src)); \ + __dest += 4; \ + __src += 4; \ + case 2: \ + *((unsigned short int *) __dest) = \ + __src[0]; \ + __dest += 2; \ + break; \ + case 7: \ + *((unsigned long int *) __dest) = \ + *((const unsigned long int *) (__src)); \ + __dest += 4; \ + __src += 4; \ + case 3: \ + *((unsigned short int *) __dest) = \ + *((const unsigned short int *) (__src)); \ + __dest[2] = '\0'; \ + __dest += 3; \ + break; \ + case 8: \ + *((unsigned long int *) __dest) = \ + *((const unsigned long int *) (__src)); \ + __dest += 4; \ + __src += 4; \ + case 4: \ + *((unsigned long int *) __dest) = \ + *((const unsigned short int *) (__src)) | \ + (__src[2] << 16); \ + __dest += 4; \ + break; \ + } \ + __dest; })) + +#endif |