sysdeps/x86_64/multiarch/varshift.h

   1 /* Helper for variable shifts of SSE registers.
   2    Copyright (C) 2010-2015 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 <stdint.h>
  20 #include <tmmintrin.h>
  21
  22 extern const int8_t ___m128i_shift_right[31] attribute_hidden;
  23
  24 static __inline__ __m128i
  25 __m128i_shift_right (__m128i value, unsigned long int offset)
  26 {
  27   return _mm_shuffle_epi8 (value,
  28                            _mm_loadu_si128 ((__m128i *) (___m128i_shift_right
  29                                                          + offset)));
  30 }