mirror of https://git.ffmpeg.org/ffmpeg.git
114 lines
3.0 KiB
C
114 lines
3.0 KiB
C
/*
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* Copyright (c) 2010 Mans Rullgard <mans@mansr.com>
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVUTIL_ARM_INTMATH_H
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#define AVUTIL_ARM_INTMATH_H
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#include <stdint.h>
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#include "config.h"
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#include "libavutil/attributes.h"
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#if HAVE_INLINE_ASM
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#if HAVE_ARMV6
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#define FASTDIV FASTDIV
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static av_always_inline av_const int FASTDIV(int a, int b)
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{
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int r;
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__asm__ ("cmp %2, #2 \n\t"
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"ldr %0, [%3, %2, lsl #2] \n\t"
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"lsrle %0, %1, #1 \n\t"
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"smmulgt %0, %0, %1 \n\t"
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: "=&r"(r) : "r"(a), "r"(b), "r"(ff_inverse) : "cc");
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return r;
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}
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#define av_clip_uint8 av_clip_uint8_arm
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static av_always_inline av_const uint8_t av_clip_uint8_arm(int a)
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{
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unsigned x;
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__asm__ ("usat %0, #8, %1" : "=r"(x) : "r"(a));
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return x;
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}
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#define av_clip_int8 av_clip_int8_arm
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static av_always_inline av_const uint8_t av_clip_int8_arm(int a)
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{
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unsigned x;
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__asm__ ("ssat %0, #8, %1" : "=r"(x) : "r"(a));
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return x;
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}
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#define av_clip_uint16 av_clip_uint16_arm
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static av_always_inline av_const uint16_t av_clip_uint16_arm(int a)
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{
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unsigned x;
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__asm__ ("usat %0, #16, %1" : "=r"(x) : "r"(a));
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return x;
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}
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#define av_clip_int16 av_clip_int16_arm
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static av_always_inline av_const int16_t av_clip_int16_arm(int a)
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{
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int x;
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__asm__ ("ssat %0, #16, %1" : "=r"(x) : "r"(a));
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return x;
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}
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#define av_clip_uintp2 av_clip_uintp2_arm
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static av_always_inline av_const unsigned av_clip_uintp2_arm(int a, int p)
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{
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unsigned x;
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__asm__ ("usat %0, %2, %1" : "=r"(x) : "r"(a), "i"(p));
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return x;
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}
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#else /* HAVE_ARMV6 */
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#define FASTDIV FASTDIV
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static av_always_inline av_const int FASTDIV(int a, int b)
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{
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int r, t;
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__asm__ ("umull %1, %0, %2, %3"
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: "=&r"(r), "=&r"(t) : "r"(a), "r"(ff_inverse[b]));
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return r;
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}
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#endif /* HAVE_ARMV6 */
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#define av_clipl_int32 av_clipl_int32_arm
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static av_always_inline av_const int32_t av_clipl_int32_arm(int64_t a)
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{
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int x, y;
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__asm__ ("adds %1, %R2, %Q2, lsr #31 \n\t"
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"mvnne %1, #1<<31 \n\t"
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"moveq %0, %Q2 \n\t"
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"eorne %0, %1, %R2, asr #31 \n\t"
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: "=r"(x), "=&r"(y) : "r"(a));
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return x;
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}
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#endif /* HAVE_INLINE_ASM */
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#endif /* AVUTIL_ARM_INTMATH_H */
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