1/* 2 * simple math operations 3 * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al 4 * 5 * This file is part of Libav. 6 * 7 * Libav is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * Libav is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with Libav; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22#ifndef AVCODEC_ARM_MATHOPS_H 23#define AVCODEC_ARM_MATHOPS_H 24 25#include <stdint.h> 26#include "config.h" 27#include "libavutil/common.h" 28 29#if HAVE_INLINE_ASM 30 31#if HAVE_ARMV6 32#define MULH MULH 33static inline av_const int MULH(int a, int b) 34{ 35 int r; 36 __asm__ ("smmul %0, %1, %2" : "=r"(r) : "r"(a), "r"(b)); 37 return r; 38} 39#endif 40 41#define MLS64(d, a, b) MAC64(d, -(a), b) 42 43#if HAVE_ARMV5TE 44 45/* signed 16x16 -> 32 multiply add accumulate */ 46# define MAC16(rt, ra, rb) \ 47 __asm__ ("smlabb %0, %1, %2, %0" : "+r"(rt) : "r"(ra), "r"(rb)); 48 49/* signed 16x16 -> 32 multiply */ 50# define MUL16 MUL16 51static inline av_const int MUL16(int ra, int rb) 52{ 53 int rt; 54 __asm__ ("smulbb %0, %1, %2" : "=r"(rt) : "r"(ra), "r"(rb)); 55 return rt; 56} 57 58#endif 59 60#define mid_pred mid_pred 61static inline av_const int mid_pred(int a, int b, int c) 62{ 63 int m; 64 __asm__ ( 65 "mov %0, %2 \n\t" 66 "cmp %1, %2 \n\t" 67 "itt gt \n\t" 68 "movgt %0, %1 \n\t" 69 "movgt %1, %2 \n\t" 70 "cmp %1, %3 \n\t" 71 "it le \n\t" 72 "movle %1, %3 \n\t" 73 "cmp %0, %1 \n\t" 74 "it gt \n\t" 75 "movgt %0, %1 \n\t" 76 : "=&r"(m), "+r"(a) 77 : "r"(b), "r"(c) 78 : "cc"); 79 return m; 80} 81 82#endif /* HAVE_INLINE_ASM */ 83 84#endif /* AVCODEC_ARM_MATHOPS_H */ 85