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libavcodec/ppc/mathops.h

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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 "config.h"
00027 
00028 #if HAVE_PPC4XX
00029 /* signed 16x16 -> 32 multiply add accumulate */
00030 #define MAC16(rt, ra, rb) \
00031     __asm__ ("maclhw %0, %2, %3" : "=r" (rt) : "0" (rt), "r" (ra), "r" (rb));
00032 
00033 /* signed 16x16 -> 32 multiply */
00034 #define MUL16(ra, rb) \
00035     ({ int __rt; \
00036     __asm__ ("mullhw %0, %1, %2" : "=r" (__rt) : "r" (ra), "r" (rb)); \
00037     __rt; })
00038 #endif
00039 
00040 #endif /* AVCODEC_PPC_MATHOPS_H */

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