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43 lines
1.5 KiB
43 lines
1.5 KiB
/* |
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* simple math operations |
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* Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef AVCODEC_I386_MATHOPS_H |
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#define AVCODEC_I386_MATHOPS_H |
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#define MULL(ra, rb, shift) \ |
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({ int rt, dummy; __asm__ (\ |
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"imull %3 \n\t"\ |
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"shrdl %4, %%edx, %%eax \n\t"\ |
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: "=a"(rt), "=d"(dummy)\ |
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: "a" ((int)ra), "rm" ((int)rb), "i"(shift));\ |
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rt; }) |
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#define MULH(ra, rb) \ |
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({ int rt, dummy;\ |
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__asm__ ("imull %3\n\t" : "=d"(rt), "=a"(dummy): "a" ((int)ra), "rm" ((int)rb));\ |
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rt; }) |
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#define MUL64(ra, rb) \ |
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({ int64_t rt;\ |
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__asm__ ("imull %2\n\t" : "=A"(rt) : "a" ((int)ra), "g" ((int)rb));\ |
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rt; }) |
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#endif /* AVCODEC_I386_MATHOPS_H */
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