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ARMv6 optimised diff_pixels

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Originally committed as revision 21702 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2010-02-09 16:13:41 +00:00
parent f73a626ae4
commit 3132614305
2 changed files with 36 additions and 0 deletions
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33
libavcodec/arm/dsputil_armv6.S
View File

@ -309,6 +309,39 @@ function ff_get_pixels_armv6, export=1
pop {r4-r8, pc}
.endfunc
function ff_diff_pixels_armv6, export=1
pld [r1, r3]
pld [r2, r3]
push {r4-r9, lr}
mov lr, #8
1:
ldrd r4, r5, [r1], r3
ldrd r6, r7, [r2], r3
uxtb16 r8, r4
uxtb16 r4, r4, ror #8
uxtb16 r9, r6
uxtb16 r6, r6, ror #8
pld [r1, r3]
ssub16 r9, r8, r9
ssub16 r6, r4, r6
uxtb16 r8, r5
uxtb16 r5, r5, ror #8
pld [r2, r3]
pkhbt r4, r9, r6, lsl #16
pkhtb r6, r6, r9, asr #16
uxtb16 r9, r7
uxtb16 r7, r7, ror #8
ssub16 r9, r8, r9
ssub16 r5, r5, r7
subs lr, lr, #1
pkhbt r8, r9, r5, lsl #16
pkhtb r9, r5, r9, asr #16
stm r0!, {r4,r6,r8,r9}
bgt 1b
pop {r4-r9, pc}
.endfunc
function ff_pix_abs16_armv6, export=1
ldr r0, [sp]
push {r4-r9, lr}

3
libavcodec/arm/dsputil_init_armv6.c
View File

@ -51,6 +51,8 @@ void ff_add_pixels_clamped_armv6(const DCTELEM *block,
int line_size);
void ff_get_pixels_armv6(DCTELEM *block, const uint8_t *pixels, int stride);
void ff_diff_pixels_armv6(DCTELEM *block, const uint8_t *s1,
const uint8_t *s2, int stride);
int ff_pix_abs16_armv6(void *s, uint8_t *blk1, uint8_t *blk2,
int line_size, int h);
@ -95,6 +97,7 @@ void av_cold ff_dsputil_init_armv6(DSPContext* c, AVCodecContext *avctx)
c->add_pixels_clamped = ff_add_pixels_clamped_armv6;
c->get_pixels = ff_get_pixels_armv6;
c->diff_pixels = ff_diff_pixels_armv6;
c->pix_abs[0][0] = ff_pix_abs16_armv6;
c->pix_abs[0][1] = ff_pix_abs16_x2_armv6;