• Main Page
  • Related Pages
  • Modules
  • Data Structures
  • Files
  • File List
  • Globals

libavcodec/ppc/mathops.h

Go to the documentation of this file.
00001 /*
00002  * simple math operations
00003  * Copyright (c) 2001, 2002 Fabrice Bellard
00004  * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al
00005  *
00006  * This file is part of FFmpeg.
00007  *
00008  * FFmpeg is free software; you can redistribute it and/or
00009  * modify it under the terms of the GNU Lesser General Public
00010  * License as published by the Free Software Foundation; either
00011  * version 2.1 of the License, or (at your option) any later version.
00012  *
00013  * FFmpeg is distributed in the hope that it will be useful,
00014  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00015  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00016  * Lesser General Public License for more details.
00017  *
00018  * You should have received a copy of the GNU Lesser General Public
00019  * License along with FFmpeg; if not, write to the Free Software
00020  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00021  */
00022 
00023 #ifndef AVCODEC_PPC_MATHOPS_H
00024 #define AVCODEC_PPC_MATHOPS_H
00025 
00026 #include <stdint.h>
00027 #include "config.h"
00028 #include "libavutil/common.h"
00029 
00030 #if HAVE_PPC4XX
00031 /* signed 16x16 -> 32 multiply add accumulate */
00032 #define MAC16(rt, ra, rb) \
00033     __asm__ ("maclhw %0, %2, %3" : "=r" (rt) : "0" (rt), "r" (ra), "r" (rb));
00034 
00035 /* signed 16x16 -> 32 multiply */
00036 #define MUL16(ra, rb) \
00037     ({ int __rt; \
00038     __asm__ ("mullhw %0, %1, %2" : "=r" (__rt) : "r" (ra), "r" (rb)); \
00039     __rt; })
00040 #endif
00041 
00042 #define MULH MULH
00043 static inline av_const int MULH(int a, int b){
00044     int r;
00045     __asm__ ("mulhw %0, %1, %2" : "=r"(r) : "r"(a), "r"(b));
00046     return r;
00047 }
00048 
00049 #if !ARCH_PPC64
00050 static inline av_const int64_t MAC64(int64_t d, int a, int b)
00051 {
00052     union { uint64_t x; unsigned hl[2]; } x = { d };
00053     int h, l;
00054     __asm__ ("mullw %3, %4, %5   \n\t"
00055              "mulhw %2, %4, %5   \n\t"
00056              "addc  %1, %1, %3   \n\t"
00057              "adde  %0, %0, %2   \n\t"
00058              : "+r"(x.hl[0]), "+r"(x.hl[1]), "=&r"(h), "=&r"(l)
00059              : "r"(a), "r"(b));
00060     return x.x;
00061 }
00062 #define MAC64(d, a, b) ((d) = MAC64(d, a, b))
00063 
00064 static inline av_const int64_t MLS64(int64_t d, int a, int b)
00065 {
00066     union { uint64_t x; unsigned hl[2]; } x = { d };
00067     int h, l;
00068     __asm__ ("mullw %3, %4, %5   \n\t"
00069              "mulhw %2, %4, %5   \n\t"
00070              "subfc %1, %3, %1   \n\t"
00071              "subfe %0, %2, %0   \n\t"
00072              : "+r"(x.hl[0]), "+r"(x.hl[1]), "=&r"(h), "=&r"(l)
00073              : "r"(a), "r"(b));
00074     return x.x;
00075 }
00076 #define MLS64(d, a, b) ((d) = MLS64(d, a, b))
00077 #endif
00078 
00079 #endif /* AVCODEC_PPC_MATHOPS_H */

Generated on Fri Sep 16 2011 17:17:34 for FFmpeg by  doxygen 1.7.1