libavcodec/avr32/mathops.h

   1 /*
   2  * Simple math operations
   3  * Copyright (c) 2009 Mans Rullgard <mans@mansr.com>
   4  *
   5  * This file is part of Libav.
   6  *
   7  * Libav 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  * Libav 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 Libav; 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 */