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avcodec/aarch64/opusdsp_neon: Simplify opus_postfilter_neon

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This change removes one extra floating point operation and simplifies
load operations at the beginning of the loop by using dedicated register
for each of the 5 pointers and interleaving it with calculations. The
first case seems to be a bit slower, but the performance increase is
substantial in the other two.

A78 before:
postfilter_15_neon:                                   1684.8 ( 4.23x)
postfilter_512_neon:                                  1395.5 ( 5.10x)
postfilter_1022_neon:                                 1357.0 ( 5.25x)

After:
postfilter_15_neon:                                   1742.2 ( 4.09x)
postfilter_512_neon:                                  1169.8 ( 6.09x)
postfilter_1022_neon:                                 1160.0 ( 6.12x)

A72 before:
postfilter_15_neon:                                   3144.8 ( 2.39x)
postfilter_512_neon:                                  3141.2 ( 2.39x)
postfilter_1022_neon:                                 3230.0 ( 2.33x)

After:
postfilter_15_neon:                                   2847.8 ( 2.64x)
postfilter_512_neon:                                  2877.8 ( 2.61x)
postfilter_1022_neon:                                 2837.2 ( 2.65x)

x13s before:
postfilter_15_neon:                                   1615.4 ( 2.61x)
postfilter_512_neon:                                   963.1 ( 4.39x)
postfilter_1022_neon:                                  963.6 ( 4.39x)

After:
postfilter_15_neon:                                   1749.6 ( 2.41x)
postfilter_512_neon:                                   707.1 ( 5.97x)
postfilter_1022_neon:                                  706.1 ( 5.99x)

Signed-off-by: Martin Storsjö <martin@martin.st>
master
Krzysztof Pyrkosz 3 weeks ago committed by Martin Storsjö
parent e75a0f3c75
commit 9fb97215df
1 changed files with 12 additions and 19 deletions
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      libavcodec/aarch64/opusdsp_neon.S

31
libavcodec/aarch64/opusdsp_neon.S
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@ -55,35 +55,28 @@ endfunc
function ff_opus_postfilter_neon, export=1
ld1 {v0.4s}, [x2]
sub x5, x0, w1, sxtw #2
sub x1, x5, #8
dup v1.4s, v0.s[1]
dup v2.4s, v0.s[2]
dup v0.4s, v0.s[0]
add w1, w1, #2
sub x1, x0, x1, lsl #2
ld1 {v3.4s}, [x1]
ld1 {v3.4s}, [x1], #16
sub x4, x5, #4
add x6, x5, #4
fmul v3.4s, v3.4s, v2.4s
1: add x1, x1, #4
ld1 {v4.4s}, [x1]
add x1, x1, #4
ld1 {v5.4s}, [x1]
add x1, x1, #4
ld1 {v6.4s}, [x1]
add x1, x1, #4
ld1 {v7.4s}, [x1]
1: ld1 {v7.4s}, [x1], #16
ld1 {v4.4s}, [x4], #16
fmla v3.4s, v7.4s, v2.4s
ld1 {v6.4s}, [x6], #16
ld1 {v5.4s}, [x5], #16
fadd v6.4s, v6.4s, v4.4s
fmla v3.4s, v5.4s, v0.4s
ld1 {v4.4s}, [x0]
fmla v4.4s, v5.4s, v0.4s
fmul v6.4s, v6.4s, v1.4s
fadd v6.4s, v6.4s, v3.4s
fadd v4.4s, v4.4s, v6.4s
fmla v3.4s, v6.4s, v1.4s
fadd v4.4s, v4.4s, v3.4s
fmul v3.4s, v7.4s, v2.4s
st1 {v4.4s}, [x0], #16

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