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ARMv6 optimised pix_sum

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Originally committed as revision 21705 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2010-02-09 16:13:52 +00:00
parent 66ec243d95
commit 41c2bd0a26
2 changed files with 27 additions and 0 deletions
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25
libavcodec/arm/dsputil_armv6.S
View File

@ -594,3 +594,28 @@ function ff_pix_norm1_armv6, export=1
mov r0, lr
pop {r4-r6, pc}
.endfunc
function ff_pix_sum_armv6, export=1
push {r4-r7, lr}
mov r12, #16
mov r2, #0
mov r3, #0
mov lr, #0
ldr r4, [r0]
1:
subs r12, r12, #1
ldr r5, [r0, #4]
usada8 r2, r4, lr, r2
ldr r6, [r0, #8]
usada8 r3, r5, lr, r3
ldr r7, [r0, #12]
usada8 r2, r6, lr, r2
beq 2f
ldr r4, [r0, r1]!
usada8 r3, r7, lr, r3
bgt 1b
2:
usada8 r3, r7, lr, r3
add r0, r2, r3
pop {r4-r7, pc}
.endfunc

2
libavcodec/arm/dsputil_init_armv6.c
View File

@ -68,6 +68,7 @@ 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);
int ff_pix_sum_armv6(uint8_t *pix, int line_size);
void av_cold ff_dsputil_init_armv6(DSPContext* c, AVCodecContext *avctx)
{
@ -116,4 +117,5 @@ void av_cold ff_dsputil_init_armv6(DSPContext* c, AVCodecContext *avctx)
c->sse[0] = ff_sse16_armv6;
c->pix_norm1 = ff_pix_norm1_armv6;
c->pix_sum = ff_pix_sum_armv6;
}