From b7904f78c1d6fd081b18b506f819e2186d9e0ae1 Mon Sep 17 00:00:00 2001 From: Måns Rullgård Date: Mon, 17 Aug 2009 02:23:53 +0000 Subject: AVR32: optimised mathops.h 44% faster MP3 decoding Originally committed as revision 19667 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/avr32/mathops.h | 100 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 100 insertions(+) create mode 100644 libavcodec/avr32/mathops.h (limited to 'libavcodec/avr32') diff --git a/libavcodec/avr32/mathops.h b/libavcodec/avr32/mathops.h new file mode 100644 index 0000000000..f39aa8800f --- /dev/null +++ b/libavcodec/avr32/mathops.h @@ -0,0 +1,100 @@ +/* + * Simple math operations + * Copyright (c) 2009 Mans Rullgard + * + * This file is part of FFmpeg. + * + * FFmpeg 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 2.1 of the License, or (at your option) any later version. + * + * FFmpeg 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 FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef AVCODEC_AVR32_MATHOPS_H +#define AVCODEC_AVR32_MATHOPS_H + +#include +#include "libavutil/common.h" + +#if HAVE_INLINE_ASM + +#define MULL MULL +static inline av_const int MULL(int a, int b, unsigned shift) +{ + union { int64_t x; int hl[2]; } x; + __asm__ ("muls.d %0, %1, %2 \n\t" + "lsr %0, %3 \n\t" + "or %0, %0, %m0<<%4 \n\t" + : "=r"(x) : "r"(b), "r"(a), "i"(shift), "i"(32-shift)); + return x.hl[1]; +} + +#define MULH MULH +static inline av_const int MULH(int a, int b) +{ + union { int64_t x; int hl[2]; } x; + __asm__ ("muls.d %0, %1, %2" : "=r"(x.x) : "r"(a), "r"(b)); + return x.hl[0]; +} + +#define MUL64 MUL64 +static inline av_const int64_t MUL64(int a, int b) +{ + int64_t x; + __asm__ ("muls.d %0, %1, %2" : "=r"(x) : "r"(a), "r"(b)); + return x; +} + +static inline av_const int64_t MAC64(int64_t d, int a, int b) +{ + __asm__ ("macs.d %0, %1, %2" : "+r"(d) : "r"(a), "r"(b)); + return d; +} +#define MAC64(d, a, b) ((d) = MAC64(d, a, b)) +#define MLS64(d, a, b) MAC64(d, -(a), b) + +static inline av_const int MAC16(int d, int a, int b) +{ + __asm__ ("machh.w %0, %1:b, %2:b" : "+r"(d) : "r"(a), "r"(b)); + return d; +} +#define MAC16(d, a, b) ((d) = MAC16(d, a, b)) +#define MLS16(d, a, b) MAC16(d, -(a), b) + +#define MUL16 MUL16 +static inline av_const int MUL16(int a, int b) +{ + int d; + __asm__ ("mulhh.w %0, %1:b, %2:b" : "=r"(d) : "r"(a), "r"(b)); + return d; +} + +#define mid_pred mid_pred +static inline av_const int mid_pred(int a, int b, int c) +{ + int m; + __asm__ ("mov %0, %2 \n\t" + "cp.w %1, %2 \n\t" + "movgt %0, %1 \n\t" + "movgt %1, %2 \n\t" + "cp.w %1, %3 \n\t" + "movle %1, %3 \n\t" + "cp.w %0, %1 \n\t" + "movgt %0, %1 \n\t" + : "=&r"(m), "+r"(a) + : "r"(b), "r"(c)); + return m; +} + +#endif /* HAVE_INLINE_ASM */ + +#endif /* AVCODEC_AVR32_MATHOPS_H */ -- cgit v1.2.3