text: /*
   * simple math operations
   * Copyright (c) 2001, 2002 Fabrice Bellard
   * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al
   *
   * This file is part of FFmpeg.
   *
   * FFmpeg is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * FFmpeg is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with FFmpeg; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
   */
  
  #ifndef AVCODEC_PPC_MATHOPS_H
  #define AVCODEC_PPC_MATHOPS_H
  
  #include <stdint.h>
  #include "config.h"
  #include "libavutil/common.h"
  
  #if HAVE_PPC4XX
  /* signed 16x16 -> 32 multiply add accumulate */
  #define MAC16(rt, ra, rb) \
      __asm__ ("maclhw %0, %2, %3" : "=r" (rt) : "0" (rt), "r" (ra), "r" (rb));
  
  /* signed 16x16 -> 32 multiply */
  #define MUL16(ra, rb) \
      ({ int __rt; \
      __asm__ ("mullhw %0, %1, %2" : "=r" (__rt) : "r" (ra), "r" (rb)); \
      __rt; })
  #endif
  
  #define MULH MULH
  static inline av_const int MULH(int a, int b){
      int r;
      __asm__ ("mulhw %0, %1, %2" : "=r"(r) : "r"(a), "r"(b));
      return r;
  }
  
  #if !ARCH_PPC64
  static inline av_const int64_t MAC64(int64_t d, int a, int b)
  {
      union { uint64_t x; unsigned hl[2]; } x = { d };
      int h, l;
      __asm__ ("mullw %3, %4, %5   \n\t"
               "mulhw %2, %4, %5   \n\t"
               "addc  %1, %1, %3   \n\t"
               "adde  %0, %0, %2   \n\t"
               : "+r"(x.hl[0]), "+r"(x.hl[1]), "=&r"(h), "=&r"(l)
               : "r"(a), "r"(b));
      return x.x;
  }
  #define MAC64(d, a, b) ((d) = MAC64(d, a, b))
  
  static inline av_const int64_t MLS64(int64_t d, int a, int b)
  {
      union { uint64_t x; unsigned hl[2]; } x = { d };
      int h, l;
      __asm__ ("mullw %3, %4, %5   \n\t"
               "mulhw %2, %4, %5   \n\t"
               "subfc %1, %3, %1   \n\t"
               "subfe %0, %2, %0   \n\t"
               : "+r"(x.hl[0]), "+r"(x.hl[1]), "=&r"(h), "=&r"(l)
               : "r"(a), "r"(b));
      return x.x;
  }
  #define MLS64(d, a, b) ((d) = MLS64(d, a, b))
  #endif
  
  #endif /* AVCODEC_PPC_MATHOPS_H */