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| author | Martin Storsjö <martin@martin.st> | 2017-01-04 13:08:51 +0200 |
|---|---|---|
| committer | Martin Storsjö <martin@martin.st> | 2017-03-11 13:14:48 +0200 |
| commit | 758302e4bc14e93989e7feb1135ec3f807c3310d (patch) | |
| tree | 10a16d328653707ab878de0f6ce61a2882a8e479 /libavcodec/arm | |
| parent | 045e33ae3fee74e39b1321dddf727eacb1ecf541 (diff) | |
| download | ffmpeg-758302e4bc14e93989e7feb1135ec3f807c3310d.tar.gz | |
arm: vp9itxfm: Optimize 16x16 and 32x32 idct dc by unrolling
This work is sponsored by, and copyright, Google.
Before: Cortex A7 A8 A9 A53
vp9_inv_dct_dct_16x16_sub1_add_neon: 273.0 189.5 211.7 235.8
vp9_inv_dct_dct_32x32_sub1_add_neon: 752.0 459.2 862.2 553.9
After:
vp9_inv_dct_dct_16x16_sub1_add_neon: 226.5 145.0 225.1 171.8
vp9_inv_dct_dct_32x32_sub1_add_neon: 721.2 415.7 727.6 475.0
This is cherrypicked from libav commit
a76bf8cf1277ef6feb1580b578f5e6ca327e713c.
Signed-off-by: Martin Storsjö <martin@martin.st>
Diffstat (limited to 'libavcodec/arm')
| -rw-r--r-- | libavcodec/arm/vp9itxfm_neon.S | 54 |
1 files changed, 36 insertions, 18 deletions
diff --git a/libavcodec/arm/vp9itxfm_neon.S b/libavcodec/arm/vp9itxfm_neon.S index 78fdae661f..dee2f058ef 100644 --- a/libavcodec/arm/vp9itxfm_neon.S +++ b/libavcodec/arm/vp9itxfm_neon.S @@ -542,16 +542,23 @@ function idct16x16_dc_add_neon vrshr.s16 q8, q8, #6 + mov r3, r0 mov r12, #16 1: @ Loop to add the constant from q8 into all 16x16 outputs - vld1.8 {q3}, [r0,:128] - vaddw.u8 q10, q8, d6 - vaddw.u8 q11, q8, d7 - vqmovun.s16 d6, q10 - vqmovun.s16 d7, q11 - vst1.8 {q3}, [r0,:128], r1 - subs r12, r12, #1 + subs r12, r12, #2 + vld1.8 {q2}, [r0,:128], r1 + vaddw.u8 q10, q8, d4 + vld1.8 {q3}, [r0,:128], r1 + vaddw.u8 q11, q8, d5 + vaddw.u8 q12, q8, d6 + vaddw.u8 q13, q8, d7 + vqmovun.s16 d4, q10 + vqmovun.s16 d5, q11 + vqmovun.s16 d6, q12 + vst1.8 {q2}, [r3,:128], r1 + vqmovun.s16 d7, q13 + vst1.8 {q3}, [r3,:128], r1 bne 1b bx lr @@ -1147,20 +1154,31 @@ function idct32x32_dc_add_neon vrshr.s16 q8, q8, #6 + mov r3, r0 mov r12, #32 1: @ Loop to add the constant from q8 into all 32x32 outputs - vld1.8 {q2-q3}, [r0,:128] - vaddw.u8 q10, q8, d4 - vaddw.u8 q11, q8, d5 - vaddw.u8 q12, q8, d6 - vaddw.u8 q13, q8, d7 - vqmovun.s16 d4, q10 - vqmovun.s16 d5, q11 - vqmovun.s16 d6, q12 - vqmovun.s16 d7, q13 - vst1.8 {q2-q3}, [r0,:128], r1 - subs r12, r12, #1 + subs r12, r12, #2 + vld1.8 {q0-q1}, [r0,:128], r1 + vaddw.u8 q9, q8, d0 + vaddw.u8 q10, q8, d1 + vld1.8 {q2-q3}, [r0,:128], r1 + vaddw.u8 q11, q8, d2 + vaddw.u8 q12, q8, d3 + vaddw.u8 q13, q8, d4 + vaddw.u8 q14, q8, d5 + vaddw.u8 q15, q8, d6 + vqmovun.s16 d0, q9 + vaddw.u8 q9, q8, d7 + vqmovun.s16 d1, q10 + vqmovun.s16 d2, q11 + vqmovun.s16 d3, q12 + vqmovun.s16 d4, q13 + vqmovun.s16 d5, q14 + vst1.8 {q0-q1}, [r3,:128], r1 + vqmovun.s16 d6, q15 + vqmovun.s16 d7, q9 + vst1.8 {q2-q3}, [r3,:128], r1 bne 1b bx lr |