sysdeps/x86_64/multiarch/strcasestr-nonascii.c

   1 /* strstr with SSE4.2 intrinsics
   2    Copyright (C) 2010-2013 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <ctype.h>
  20 #include <xmmintrin.h>
  21
  22
  23 /* Similar to __m128i_strloadu.  Convert to lower case for none-POSIX/C
  24    locale.  */
  25 static inline __m128i
  26 __m128i_strloadu_tolower (const unsigned char *p)
  27 {
  28   union
  29     {
  30       char b[16];
  31       __m128i x;
  32     } u;
  33
  34   for (int i = 0; i < 16; ++i)
  35     if (p[i] == 0)
  36       {
  37         u.b[i] = 0;
  38         break;
  39       }
  40     else
  41       u.b[i] = tolower (p[i]);
  42
  43   return u.x;
  44 }
  45
  46
  47 #define STRCASESTR_NONASCII
  48 #define USE_AS_STRCASESTR
  49 #define STRSTR_SSE42 __strcasestr_sse42_nonascii
  50 #include "strstr.c"