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  1. /*
  2.  * Simple math operations
  3.  * Copyright (c) 2009 Mans Rullgard <mans@mansr.com>
  4.  *
  5.  * This file is part of FFmpeg.
  6.  *
  7.  * FFmpeg is free software; you can redistribute it and/or
  8.  * modify it under the terms of the GNU Lesser General Public
  9.  * License as published by the Free Software Foundation; either
  10.  * version 2.1 of the License, or (at your option) any later version.
  11.  *
  12.  * FFmpeg is distributed in the hope that it will be useful,
  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15.  * Lesser General Public License for more details.
  16.  *
  17.  * You should have received a copy of the GNU Lesser General Public
  18.  * License along with FFmpeg; if not, write to the Free Software
  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20.  */
  21.  
  22. #ifndef AVCODEC_AVR32_MATHOPS_H
  23. #define AVCODEC_AVR32_MATHOPS_H
  24.  
  25. #include <stdint.h>
  26. #include "config.h"
  27. #include "libavutil/common.h"
  28.  
  29. #if HAVE_INLINE_ASM
  30.  
  31. #define MULL MULL
  32. static inline av_const int MULL(int a, int b, unsigned shift)
  33. {
  34.     union { int64_t x; int hl[2]; } x;
  35.     __asm__ ("muls.d %0, %1, %2       \n\t"
  36.              "lsr    %0, %3           \n\t"
  37.              "or     %0, %0, %m0<<%4  \n\t"
  38.              : "=r"(x) : "r"(b), "r"(a), "i"(shift), "i"(32-shift));
  39.     return x.hl[1];
  40. }
  41.  
  42. #define MULH MULH
  43. static inline av_const int MULH(int a, int b)
  44. {
  45.     union { int64_t x; int hl[2]; } x;
  46.     __asm__ ("muls.d %0, %1, %2" : "=r"(x.x) : "r"(a), "r"(b));
  47.     return x.hl[0];
  48. }
  49.  
  50. #define MUL64 MUL64
  51. static inline av_const int64_t MUL64(int a, int b)
  52. {
  53.     int64_t x;
  54.     __asm__ ("muls.d %0, %1, %2" : "=r"(x) : "r"(a), "r"(b));
  55.     return x;
  56. }
  57.  
  58. static inline av_const int64_t MAC64(int64_t d, int a, int b)
  59. {
  60.     __asm__ ("macs.d %0, %1, %2" : "+r"(d) : "r"(a), "r"(b));
  61.     return d;
  62. }
  63. #define MAC64(d, a, b) ((d) = MAC64(d, a, b))
  64. #define MLS64(d, a, b) MAC64(d, -(a), b)
  65.  
  66. static inline av_const int MAC16(int d, int a, int b)
  67. {
  68.     __asm__ ("machh.w %0, %1:b, %2:b" : "+r"(d) : "r"(a), "r"(b));
  69.     return d;
  70. }
  71. #define MAC16(d, a, b) ((d) = MAC16(d, a, b))
  72. #define MLS16(d, a, b) MAC16(d, -(a), b)
  73.  
  74. #define MUL16 MUL16
  75. static inline av_const int MUL16(int a, int b)
  76. {
  77.     int d;
  78.     __asm__ ("mulhh.w %0, %1:b, %2:b" : "=r"(d) : "r"(a), "r"(b));
  79.     return d;
  80. }
  81.  
  82. #define mid_pred mid_pred
  83. static inline av_const int mid_pred(int a, int b, int c)
  84. {
  85.     int m;
  86.     __asm__ ("mov   %0, %2  \n\t"
  87.              "cp.w  %1, %2  \n\t"
  88.              "movgt %0, %1  \n\t"
  89.              "movgt %1, %2  \n\t"
  90.              "cp.w  %1, %3  \n\t"
  91.              "movle %1, %3  \n\t"
  92.              "cp.w  %0, %1  \n\t"
  93.              "movgt %0, %1  \n\t"
  94.              : "=&r"(m), "+r"(a)
  95.              : "r"(b), "r"(c));
  96.     return m;
  97. }
  98.  
  99. #endif /* HAVE_INLINE_ASM */
  100.  
  101. #endif /* AVCODEC_AVR32_MATHOPS_H */
  102.