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Modify calling of NEON code in sub-pixel search

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In vp8_find_best_sub_pixel_step_iteratively(), many times xoffset
and yoffset are specific values - (4,0) (0,4) and (4,4). Modified
code to call simplified NEON version at these specific offsets to
help with the performance.

Change-Id: Iaf896a0f7aae4697bd36a49e182525dd1ef1ab4d
This commit is contained in:
Yunqing Wang 2011-01-18 14:19:52 -05:00
parent edcf74c6ad
commit ce6c954d2e
2 changed files with 33 additions and 2 deletions
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31
vp8/encoder/arm/arm_csystemdependent.c
View File

@ -18,6 +18,37 @@ extern void (*vp8_yv12_copy_partial_frame_ptr)(YV12_BUFFER_CONFIG *src_ybc, YV12
extern void vp8_yv12_copy_partial_frame(YV12_BUFFER_CONFIG *src_ybc, YV12_BUFFER_CONFIG *dst_ybc, int Fraction);
extern void vpxyv12_copy_partial_frame_neon(YV12_BUFFER_CONFIG *src_ybc, YV12_BUFFER_CONFIG *dst_ybc, int Fraction);
extern unsigned int vp8_sub_pixel_variance16x16_neon_func
(
const unsigned char *src_ptr,
int src_pixels_per_line,
int xoffset,
int yoffset,
const unsigned char *dst_ptr,
int dst_pixels_per_line,
unsigned int *sse
);
unsigned int vp8_sub_pixel_variance16x16_neon
(
const unsigned char *src_ptr,
int src_pixels_per_line,
int xoffset,
int yoffset,
const unsigned char *dst_ptr,
int dst_pixels_per_line,
unsigned int *sse
)
{
if (xoffset == 4 && yoffset == 0)
return vp8_variance_halfpixvar16x16_h_neon(src_ptr, src_pixels_per_line, dst_ptr, dst_pixels_per_line, sse);
else if (xoffset == 0 && yoffset == 4)
return vp8_variance_halfpixvar16x16_v_neon(src_ptr, src_pixels_per_line, dst_ptr, dst_pixels_per_line, sse);
else if (xoffset == 4 && yoffset == 4)
return vp8_variance_halfpixvar16x16_hv_neon(src_ptr, src_pixels_per_line, dst_ptr, dst_pixels_per_line, sse);
else
return vp8_sub_pixel_variance16x16_neon_func(src_ptr, src_pixels_per_line, xoffset, yoffset, dst_ptr, dst_pixels_per_line, sse);
}
void vp8_arch_arm_encoder_init(VP8_COMP *cpi)
{
#if CONFIG_RUNTIME_CPU_DETECT

4
vp8/encoder/arm/neon/vp8_subpixelvariance16x16_neon.asm
View File

@ -9,7 +9,7 @@
;
EXPORT |vp8_sub_pixel_variance16x16_neon|
EXPORT |vp8_sub_pixel_variance16x16_neon_func|
ARM
REQUIRE8
PRESERVE8
@ -24,7 +24,7 @@
; stack(r6) unsigned int *sse
;note: most of the code is copied from bilinear_predict16x16_neon and vp8_variance16x16_neon.
|vp8_sub_pixel_variance16x16_neon| PROC
|vp8_sub_pixel_variance16x16_neon_func| PROC
push {r4-r6, lr}
ldr r12, _BilinearTaps_coeff_