src/util/u_memset.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2020 Red Hat
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL THE AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "pipe/p_config.h"
  29
  30 static inline void *
  31 util_memset32(void *s, uint32_t ui, size_t n)
  32 {
  33 #if defined(PIPE_CC_GCC) && defined(PIPE_ARCH_X86_64)
  34    long d0, d1;
  35    __asm__ volatile("rep\n\t"
  36                     "stosl"
  37                     : "=&c" (d0), "=&D" (d1)
  38                     : "a" (ui), "1" (s), "0" (n)
  39                     : "memory");
  40    return s;
  41 #else
  42    uint32_t *xs = (uint32_t *)s;
  43    while (n--)
  44       *xs++ = ui;
  45    return s;
  46 #endif
  47 }