/* * simple math operations * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al * * 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_ARM_MATHOPS_H#define AVCODEC_ARM_MATHOPS_H #include <stdint.h>#include "config.h"#include "libavutil/common.h" #if HAVE_INLINE_ASM #if HAVE_ARMV6_INLINE#define MULH MULHstatic inline av_const int MULH(int a, int b){    int r;    __asm__ ("smmul %0, %1, %2" : "=r"(r) : "r"(a), "r"(b));    return r;} #define FASTDIV FASTDIVstatic av_always_inline av_const int FASTDIV(int a, int b){    int r;    __asm__ ("cmp     %2, #2               \n\t"             "ldr     %0, [%3, %2, lsl #2] \n\t"             "ite     le                   \n\t"             "lsrle   %0, %1, #1           \n\t"             "smmulgt %0, %0, %1           \n\t"             : "=&r"(r) : "r"(a), "r"(b), "r"(ff_inverse) : "cc");    return r;} #else /* HAVE_ARMV6_INLINE */ #define FASTDIV FASTDIVstatic av_always_inline av_const int FASTDIV(int a, int b){    int r, t;    __asm__ ("umull %1, %0, %2, %3"             : "=&r"(r), "=&r"(t) : "r"(a), "r"(ff_inverse[b]));    return r;}#endif #define MLS64(d, a, b) MAC64(d, -(a), b) #if HAVE_ARMV5TE_INLINE /* signed 16x16 -> 32 multiply add accumulate */#   define MAC16(rt, ra, rb)                                            \    __asm__ ("smlabb %0, %1, %2, %0" : "+r"(rt) : "r"(ra), "r"(rb)); /* signed 16x16 -> 32 multiply */#   define MUL16 MUL16static inline av_const int MUL16(int ra, int rb){    int rt;    __asm__ ("smulbb %0, %1, %2" : "=r"(rt) : "r"(ra), "r"(rb));    return rt;} #endif #define mid_pred mid_predstatic inline av_const int mid_pred(int a, int b, int c){    int m;    __asm__ (        "mov   %0, %2  \n\t"        "cmp   %1, %2  \n\t"        "itt   gt      \n\t"        "movgt %0, %1  \n\t"        "movgt %1, %2  \n\t"        "cmp   %1, %3  \n\t"        "it    le      \n\t"        "movle %1, %3  \n\t"        "cmp   %0, %1  \n\t"        "it    gt      \n\t"        "movgt %0, %1  \n\t"        : "=&r"(m), "+r"(a)        : "r"(b), "r"(c)        : "cc");    return m;} #endif /* HAVE_INLINE_ASM */ #endif /* AVCODEC_ARM_MATHOPS_H */