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  1. /*
  2.  * Copyright (c) 2012
  3.  *      MIPS Technologies, Inc., California.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  * 1. Redistributions of source code must retain the above copyright
  9.  *    notice, this list of conditions and the following disclaimer.
  10.  * 2. Redistributions in binary form must reproduce the above copyright
  11.  *    notice, this list of conditions and the following disclaimer in the
  12.  *    documentation and/or other materials provided with the distribution.
  13.  * 3. Neither the name of the MIPS Technologies, Inc., nor the names of its
  14.  *    contributors may be used to endorse or promote products derived from
  15.  *    this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND
  18.  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19.  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20.  * ARE DISCLAIMED.  IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE
  21.  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22.  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23.  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24.  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25.  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26.  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27.  * SUCH DAMAGE.
  28.  *
  29.  * Author:  Nedeljko Babic (nbabic@mips.com)
  30.  *
  31.  * This file is part of FFmpeg.
  32.  *
  33.  * FFmpeg is free software; you can redistribute it and/or
  34.  * modify it under the terms of the GNU Lesser General Public
  35.  * License as published by the Free Software Foundation; either
  36.  * version 2.1 of the License, or (at your option) any later version.
  37.  *
  38.  * FFmpeg is distributed in the hope that it will be useful,
  39.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  40.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  41.  * Lesser General Public License for more details.
  42.  *
  43.  * You should have received a copy of the GNU Lesser General Public
  44.  * License along with FFmpeg; if not, write to the Free Software
  45.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  46.  */
  47.  
  48. /**
  49.  * @file
  50.  * MIPS optimization for some libm functions
  51.  */
  52.  
  53. #ifndef AVUTIL_LIBM_MIPS_H
  54. #define AVUTIL_LIBM_MIPS_H
  55.  
  56. static av_always_inline av_const long int lrintf_mips(float x)
  57. {
  58.     register int ret_int;
  59.  
  60.     __asm__ volatile (
  61.         "cvt.w.s    %[x],       %[x]    \n\t"
  62.         "mfc1       %[ret_int], %[x]    \n\t"
  63.  
  64.         :[x]"+f"(x), [ret_int]"=r"(ret_int)
  65.     );
  66.     return ret_int;
  67. }
  68.  
  69. #undef lrintf
  70. #define lrintf(x)   lrintf_mips(x)
  71.  
  72. #define HAVE_LRINTF 1
  73. #endif /* AVUTIL_LIBM_MIPS_H */
  74.