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  1. /*
  2.  * simple math operations
  3.  * Copyright (c) 2001, 2002 Fabrice Bellard
  4.  * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al
  5.  *
  6.  * This file is part of FFmpeg.
  7.  *
  8.  * FFmpeg is free software; you can redistribute it and/or
  9.  * modify it under the terms of the GNU Lesser General Public
  10.  * License as published by the Free Software Foundation; either
  11.  * version 2.1 of the License, or (at your option) any later version.
  12.  *
  13.  * FFmpeg is distributed in the hope that it will be useful,
  14.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16.  * Lesser General Public License for more details.
  17.  *
  18.  * You should have received a copy of the GNU Lesser General Public
  19.  * License along with FFmpeg; if not, write to the Free Software
  20.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21.  */
  22.  
  23. #ifndef AVCODEC_PPC_MATHOPS_H
  24. #define AVCODEC_PPC_MATHOPS_H
  25.  
  26. #include <stdint.h>
  27. #include "config.h"
  28. #include "libavutil/common.h"
  29.  
  30. #if HAVE_PPC4XX
  31. /* signed 16x16 -> 32 multiply add accumulate */
  32. #define MAC16(rt, ra, rb) \
  33.     __asm__ ("maclhw %0, %2, %3" : "=r" (rt) : "0" (rt), "r" (ra), "r" (rb));
  34.  
  35. /* signed 16x16 -> 32 multiply */
  36. #define MUL16(ra, rb) \
  37.     ({ int __rt; \
  38.     __asm__ ("mullhw %0, %1, %2" : "=r" (__rt) : "r" (ra), "r" (rb)); \
  39.     __rt; })
  40. #endif
  41.  
  42. #define MULH MULH
  43. static inline av_const int MULH(int a, int b){
  44.     int r;
  45.     __asm__ ("mulhw %0, %1, %2" : "=r"(r) : "r"(a), "r"(b));
  46.     return r;
  47. }
  48.  
  49. #if !ARCH_PPC64
  50. static inline av_const int64_t MAC64(int64_t d, int a, int b)
  51. {
  52.     union { uint64_t x; unsigned hl[2]; } x = { d };
  53.     int h, l;
  54.     __asm__ ("mullw %3, %4, %5   \n\t"
  55.              "mulhw %2, %4, %5   \n\t"
  56.              "addc  %1, %1, %3   \n\t"
  57.              "adde  %0, %0, %2   \n\t"
  58.              : "+r"(x.hl[0]), "+r"(x.hl[1]), "=&r"(h), "=&r"(l)
  59.              : "r"(a), "r"(b));
  60.     return x.x;
  61. }
  62. #define MAC64(d, a, b) ((d) = MAC64(d, a, b))
  63.  
  64. static inline av_const int64_t MLS64(int64_t d, int a, int b)
  65. {
  66.     union { uint64_t x; unsigned hl[2]; } x = { d };
  67.     int h, l;
  68.     __asm__ ("mullw %3, %4, %5   \n\t"
  69.              "mulhw %2, %4, %5   \n\t"
  70.              "subfc %1, %3, %1   \n\t"
  71.              "subfe %0, %2, %0   \n\t"
  72.              : "+r"(x.hl[0]), "+r"(x.hl[1]), "=&r"(h), "=&r"(l)
  73.              : "r"(a), "r"(b));
  74.     return x.x;
  75. }
  76. #define MLS64(d, a, b) ((d) = MLS64(d, a, b))
  77. #endif
  78.  
  79. #endif /* AVCODEC_PPC_MATHOPS_H */
  80.