From 99aed7c8fc9db68a18816a98b84bf0c09a00cf1e Mon Sep 17 00:00:00 2001 From: Luca Barbato Date: Tue, 19 Sep 2006 22:22:29 +0000 Subject: New single instruction math operation header Originally committed as revision 6291 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/mathops.h | 67 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 libavcodec/mathops.h (limited to 'libavcodec/mathops.h') diff --git a/libavcodec/mathops.h b/libavcodec/mathops.h new file mode 100644 index 0000000000..69ed017637 --- /dev/null +++ b/libavcodec/mathops.h @@ -0,0 +1,67 @@ +/* + * simple math operations + * Copyright (c) 2001, 2002 Fabrice Bellard. + * Copyright (c) 2006 Michael Niedermayer et al + * + * This library 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 of the License, or (at your option) any later version. + * + * This library 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 this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ +#ifndef MATHOPS_H +#define MATHOPS_H + +#ifdef ARCH_X86 + +#include "i386/mathops.h" + +#elif defined(ARCH_ARMV4L) + +#include "armv4l/mathops.h" + +#elif defined(ARCH_PPC) + +#include "ppc/mathops.h" + +#endif + +/* generic implementation */ + +#ifndef MULL +# define MULL(a,b) (((int64_t)(a) * (int64_t)(b)) >> FRAC_BITS) +#endif + +#ifndef MULH +//gcc 3.4 creates an incredibly bloated mess out of this +//# define MULH(a,b) (((int64_t)(a) * (int64_t)(b))>>32) + +static always_inline int MULH(int a, int b){ + return ((int64_t)(a) * (int64_t)(b))>>32; +} +#endif + +#ifndef MUL64 +# define MUL64(a,b) ((int64_t)(a) * (int64_t)(b)) +#endif + +/* signed 16x16 -> 32 multiply add accumulate */ +#ifndef MAC16 +# define MAC16(rt, ra, rb) rt += (ra) * (rb) +#endif + +/* signed 16x16 -> 32 multiply */ +#ifndef MUL16 +# define MUL16(ra, rb) ((ra) * (rb)) +#endif + +#endif //MATHOPS_H + -- cgit v1.2.3