libm_mips.h 2.8 KB

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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. * @file
  49. * MIPS optimization for some libm functions
  50. */
  51. #ifndef AVUTIL_LIBM_MIPS_H
  52. #define AVUTIL_LIBM_MIPS_H
  53. static av_always_inline av_const long int lrintf_mips(float x)
  54. {
  55. register int ret_int;
  56. __asm__ volatile (
  57. "cvt.w.s %[x], %[x] \n\t"
  58. "mfc1 %[ret_int], %[x] \n\t"
  59. :[x]"+f"(x), [ret_int]"=r"(ret_int)
  60. );
  61. return ret_int;
  62. }
  63. #undef lrintf
  64. #define lrintf(x) lrintf_mips(x)
  65. #define HAVE_LRINTF 1
  66. #endif /* AVUTIL_LIBM_MIPS_H */