/* * 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 MULH static 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 FASTDIV static 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 FASTDIV static 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 MUL16 static 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_pred static 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 */