On Tue, 29 Apr 2025, Zhao Zhili wrote:
On Apr 25, 2025, at 16:25, Martin Storsjö <mar...@martin.st> wrote:
On Tue, 15 Apr 2025, Zhao Zhili wrote:
+ tbx v3.8b, {v16.16b-v17.16b}, v3.8b
Is there any specific reason for preferring tbx over tbl here? (I know the
existing code used tbx.) Without having studied cycle tables, I would expect
tbl to maybe be slightly simpler, but perhaps there's no difference (or tbx is
faster)?
tbl can be faster. The result is quite impressive. Changed to tbl before push.
Before tbx tbl
hevc_sao_band_8_8_c: 252.3 ( 1.00x) 252.3 ( 1.00x) 252.3 (
1.00x)
hevc_sao_band_8_8_neon: 95.8 ( 2.63x) 61.0 ( 4.14x) 61.0 (
4.57x)
hevc_sao_band_16_8_c: 875.2 ( 1.00x) 864.9 ( 1.00x) 864.9 (
1.00x)
hevc_sao_band_16_8_neon: 317.5 ( 2.76x) 150.0 ( 5.76x) 150.0 (
6.26x)
hevc_sao_band_32_8_c: 3853.5 ( 1.00x) 3871.6 ( 1.00x) 3871.6 (
1.00x)
hevc_sao_band_32_8_neon: 1222.3 ( 3.15x) 550.6 ( 7.03x) 550.6 ( 7.39)
hevc_sao_band_48_8_c: 8203.6 ( 1.00x) 8182.6 ( 1.00x) 8182.6 (
1.00x)
hevc_sao_band_48_8_neon: 2685.7 ( 3.05x) 1185.8 ( 6.90x) 1185.8 (
7.36x)
hevc_sao_band_64_8_c: 14023.0 ( 1.00x) 14038.9 ( 1.00x) 14038.9 (
1.00x)
hevc_sao_band_64_8_neon: 4783.2 ( 2.93x) 2078.4 ( 6.75x) 2078.4 (
7.15x)
The cycle numbers in the tbl and tbx columns seem to be identical here,
while the relative speedup numbers differ - was this some sort of
copypaste mistake in preparing the table? (The difference in speedup
numbers does seem impressive.)
// Martin
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