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| author | Scott LaVarnway <slavarnway@google.com> | 2011-11-17 12:54:42 -0500 |
|---|---|---|
| committer | Tero Rintaluoma <teror@google.com> | 2011-11-25 09:24:04 +0200 |
| commit | 4a91541c946c1fc2655a942ec79033618f03c4ca (patch) | |
| tree | 70093355ebd25dd2c79515f7950c8490f6937355 /vp8/common/arm/neon | |
| parent | 7b0feac4a4386eef3e1ea851e52e4f30935e255d (diff) | |
| download | libvpx-4a91541c946c1fc2655a942ec79033618f03c4ca.tar libvpx-4a91541c946c1fc2655a942ec79033618f03c4ca.tar.gz libvpx-4a91541c946c1fc2655a942ec79033618f03c4ca.tar.bz2 libvpx-4a91541c946c1fc2655a942ec79033618f03c4ca.zip | |
Modified the inverse walsh to output directly
to the dqcoeff or qcoeff buffer. The encoder would
populate the dc coeffs of the y blocks as a separate
stage (recon_dcblock) and the decoder would use a special
version of the idct. This change eliminates the extra copy
and reduces the code footprint.
[Tero] Added needed changes to armv6 and NEON assembly.
Change-Id: I83202ffdbaf83f6e5dd69f4ba2519fcf0b13b3ba
Diffstat (limited to 'vp8/common/arm/neon')
| -rw-r--r-- | vp8/common/arm/neon/iwalsh_neon.asm | 37 |
1 files changed, 22 insertions, 15 deletions
diff --git a/vp8/common/arm/neon/iwalsh_neon.asm b/vp8/common/arm/neon/iwalsh_neon.asm index 01c79d937..e8ea2a619 100644 --- a/vp8/common/arm/neon/iwalsh_neon.asm +++ b/vp8/common/arm/neon/iwalsh_neon.asm @@ -8,7 +8,6 @@ ; be found in the AUTHORS file in the root of the source tree. ; EXPORT |vp8_short_inv_walsh4x4_neon| - EXPORT |vp8_short_inv_walsh4x4_1_neon| ARM REQUIRE8 @@ -16,7 +15,7 @@ AREA |.text|, CODE, READONLY ; name this block of code -;short vp8_short_inv_walsh4x4_neon(short *input, short *output) +;short vp8_short_inv_walsh4x4_neon(short *input, short *mb_dqcoeff) |vp8_short_inv_walsh4x4_neon| PROC ; read in all four lines of values: d0->d3 @@ -59,22 +58,30 @@ vshr.s16 q0, q0, #3 ;e/f >> 3 vshr.s16 q1, q1, #3 ;g/h >> 3 - vst4.i16 {d0,d1,d2,d3}, [r1@128] + mov r2, #64 + add r3, r1, #32 - bx lr - ENDP ; |vp8_short_inv_walsh4x4_neon| + vst1.i16 d0[0], [r1],r2 + vst1.i16 d1[0], [r3],r2 + vst1.i16 d2[0], [r1],r2 + vst1.i16 d3[0], [r3],r2 + + vst1.i16 d0[1], [r1],r2 + vst1.i16 d1[1], [r3],r2 + vst1.i16 d2[1], [r1],r2 + vst1.i16 d3[1], [r3],r2 + vst1.i16 d0[2], [r1],r2 + vst1.i16 d1[2], [r3],r2 + vst1.i16 d2[2], [r1],r2 + vst1.i16 d3[2], [r3],r2 + + vst1.i16 d0[3], [r1],r2 + vst1.i16 d1[3], [r3],r2 + vst1.i16 d2[3], [r1] + vst1.i16 d3[3], [r3] -;short vp8_short_inv_walsh4x4_1_neon(short *input, short *output) -|vp8_short_inv_walsh4x4_1_neon| PROC - ldrsh r2, [r0] ; load input[0] - add r3, r2, #3 ; add 3 - add r2, r1, #16 ; base for last 8 output - asr r0, r3, #3 ; right shift 3 - vdup.16 q0, r0 ; load and duplicate - vst1.16 {q0}, [r1@128] ; write back 8 - vst1.16 {q0}, [r2@128] ; write back last 8 bx lr - ENDP ; |vp8_short_inv_walsh4x4_1_neon| + ENDP ; |vp8_short_inv_walsh4x4_neon| END |