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ARM: ARMv6 optimised add_pixels_clamped() 

Originally committed as revision 20184 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2009-10-06 21:55:35 +00:00
parent c8315e9186
commit 153f49570f
3 changed files with 57 additions and 0 deletions
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1
libavcodec/Makefile
View File

@ -493,6 +493,7 @@ OBJS-$(HAVE_ARMV5TE) += arm/dsputil_init_armv5te.o \
arm/simple_idct_armv5te.o \
OBJS-$(HAVE_ARMV6) += arm/dsputil_init_armv6.o \
arm/dsputil_armv6.o \
arm/simple_idct_armv6.o \
OBJS-$(HAVE_ARMVFP) += arm/dsputil_vfp.o \

50
libavcodec/arm/dsputil_armv6.S Normal file
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@ -0,0 +1,50 @@
/*
* Copyright (c) 2009 Mans Rullgard <mans@mansr.com>
*
* 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
*/
#include "asm.S"
.text
function ff_add_pixels_clamped_armv6, export=1
push {r4-r8,lr}
mov r3, #8
1:
ldm r0!, {r4,r5,r12,lr}
ldrd r6, r7, [r1]
pkhbt r8, r4, r5, lsl #16
pkhtb r5, r5, r4, asr #16
pkhbt r4, r12, lr, lsl #16
pkhtb lr, lr, r12, asr #16
pld [r1, r2]
uxtab16 r8, r8, r6
uxtab16 r5, r5, r6, ror #8
uxtab16 r4, r4, r7
uxtab16 lr, lr, r7, ror #8
usat16 r8, #8, r8
usat16 r5, #8, r5
usat16 r4, #8, r4
usat16 lr, #8, lr
orr r6, r8, r5, lsl #8
orr r7, r4, lr, lsl #8
subs r3, r3, #1
strd r6, r7, [r1], r2
bgt 1b
pop {r4-r8,pc}
.endfunc

6
libavcodec/arm/dsputil_init_armv6.c
View File

@ -25,6 +25,10 @@ void ff_simple_idct_armv6(DCTELEM *data);
void ff_simple_idct_put_armv6(uint8_t *dest, int line_size, DCTELEM *data);
void ff_simple_idct_add_armv6(uint8_t *dest, int line_size, DCTELEM *data);
void ff_add_pixels_clamped_armv6(const DCTELEM *block,
uint8_t *restrict pixels,
int line_size);
void av_cold ff_dsputil_init_armv6(DSPContext* c, AVCodecContext *avctx)
{
if (!avctx->lowres && (avctx->idct_algo == FF_IDCT_AUTO ||
@ -34,4 +38,6 @@ void av_cold ff_dsputil_init_armv6(DSPContext* c, AVCodecContext *avctx)
c->idct = ff_simple_idct_armv6;
c->idct_permutation_type = FF_LIBMPEG2_IDCT_PERM;
}
c->add_pixels_clamped = ff_add_pixels_clamped_armv6;
}