1/* 2 * simple math operations 3 * 4 * Copyright (C) 2007 Marc Hoffman <mmhoffm@gmail.com> 5 * 6 * This file is part of Libav. 7 * 8 * Libav is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Lesser General Public 10 * License as published by the Free Software Foundation; either 11 * version 2.1 of the License, or (at your option) any later version. 12 * 13 * Libav is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Lesser General Public License for more details. 17 * 18 * You should have received a copy of the GNU Lesser General Public 19 * License along with Libav; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 */ 22#ifndef AVCODEC_BFIN_MATHOPS_H 23#define AVCODEC_BFIN_MATHOPS_H 24 25#include "config.h" 26 27#define MULH(X,Y) ({ int xxo; \ 28 __asm__ ( \ 29 "a1 = %2.L * %1.L (FU);\n\t" \ 30 "a1 = a1 >> 16;\n\t" \ 31 "a1 += %2.H * %1.L (IS,M);\n\t" \ 32 "a0 = %1.H * %2.H, a1+= %1.H * %2.L (IS,M);\n\t"\ 33 "a1 = a1 >>> 16;\n\t" \ 34 "%0 = (a0 += a1);\n\t" \ 35 : "=d" (xxo) : "d" (X), "d" (Y) : "A0","A1"); xxo; }) 36 37/* signed 16x16 -> 32 multiply */ 38#define MUL16(a, b) ({ int xxo; \ 39 __asm__ ( \ 40 "%0 = %1.l*%2.l (is);\n\t" \ 41 : "=W" (xxo) : "d" (a), "d" (b) : "A1"); \ 42 xxo; }) 43 44#endif /* AVCODEC_BFIN_MATHOPS_H */ 45