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ARMv6 optimised pix_norm1

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Originally committed as revision 21704 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2010-02-09 16:13:49 +00:00
parent 0c28474c92
commit 66ec243d95
2 changed files with 34 additions and 0 deletions
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30
libavcodec/arm/dsputil_armv6.S
View File

@ -564,3 +564,33 @@ function ff_sse16_armv6, export=1
pop {r4-r9, pc}
.endfunc
function ff_pix_norm1_armv6, export=1
push {r4-r6, lr}
mov r12, #16
mov lr, #0
1:
ldm r0, {r2-r5}
uxtb16 r6, r2
uxtb16 r2, r2, ror #8
smlad lr, r6, r6, lr
uxtb16 r6, r3
smlad lr, r2, r2, lr
uxtb16 r3, r3, ror #8
smlad lr, r6, r6, lr
uxtb16 r6, r4
smlad lr, r3, r3, lr
uxtb16 r4, r4, ror #8
smlad lr, r6, r6, lr
uxtb16 r6, r5
smlad lr, r4, r4, lr
uxtb16 r5, r5, ror #8
smlad lr, r6, r6, lr
subs r12, r12, #1
add r0, r0, r1
smlad lr, r5, r5, lr
bgt 1b
mov r0, lr
pop {r4-r6, pc}
.endfunc

4
libavcodec/arm/dsputil_init_armv6.c
View File

@ -67,6 +67,8 @@ int ff_pix_abs8_armv6(void *s, uint8_t *blk1, uint8_t *blk2,
int ff_sse16_armv6(void *s, uint8_t *blk1, uint8_t *blk2,
int line_size, int h);
int ff_pix_norm1_armv6(uint8_t *pix, int line_size);
void av_cold ff_dsputil_init_armv6(DSPContext* c, AVCodecContext *avctx)
{
if (!avctx->lowres && (avctx->idct_algo == FF_IDCT_AUTO ||
@ -112,4 +114,6 @@ void av_cold ff_dsputil_init_armv6(DSPContext* c, AVCodecContext *avctx)
c->sad[1] = ff_pix_abs8_armv6;
c->sse[0] = ff_sse16_armv6;
c->pix_norm1 = ff_pix_norm1_armv6;
}