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/libavcodec/avr32/mathops.h

http://github.com/FFmpeg/FFmpeg
C Header | 101 lines | 69 code | 12 blank | 20 comment | 0 complexity | cbbfe08c3755463232aeb227ef4eb14e MD5 | raw file
  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
 32static 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
 43static 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
 51static 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
 58static 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
 66static 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
 75static 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
 83static 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 */