From: Krzysztof Pyrkosz via ffmpeg-devel <ffmpeg-devel@ffmpeg.org>
To: ffmpeg-devel@ffmpeg.org
Cc: Krzysztof Pyrkosz <ffmpeg@szaka.eu>
Subject: [FFmpeg-devel] [PATCH 1/2] avcodec/aarch64/vvc: Optimize vvc_avg{8, 10, 12}
Date: Wed, 19 Feb 2025 18:40:10 +0100
Message-ID: <20250219174010.3911-2-ffmpeg@szaka.eu> (raw)
---
This patch replaces integer widening with halving addition, and
multi-step "emulated" rounding shift with a single asm instruction doing
exactly that. This pattern repeats in other functions in this file, I
fixed some in the succeeding patch. There's a lot of performance to be
gained there.
I didn't modify the existing function because it adds a few extra steps
solely for the shared w_avg implementation (every cycle matters), but also
because I find this linear version easier to digest and understand.
Besides, I noticed that removing smin and smax instructions used for
clamping the values for 10 and 12 bit_depth instantiations does not
affect the checkasm result, but it breaks FATE.
Benchmarks before and after:
A78
avg_8_2x2_neon: 21.0 ( 1.55x)
avg_8_4x4_neon: 25.8 ( 3.05x)
avg_8_8x8_neon: 45.0 ( 5.86x)
avg_8_16x16_neon: 178.5 ( 5.49x)
avg_8_32x32_neon: 709.2 ( 6.20x)
avg_8_64x64_neon: 2686.2 ( 6.12x)
avg_8_128x128_neon: 10734.2 ( 5.88x)
avg_10_2x2_neon: 19.0 ( 1.75x)
avg_10_4x4_neon: 28.2 ( 2.76x)
avg_10_8x8_neon: 44.0 ( 5.82x)
avg_10_16x16_neon: 179.5 ( 4.81x)
avg_10_32x32_neon: 680.8 ( 5.58x)
avg_10_64x64_neon: 2536.8 ( 5.40x)
avg_10_128x128_neon: 10079.0 ( 5.22x)
avg_12_2x2_neon: 20.8 ( 1.59x)
avg_12_4x4_neon: 25.2 ( 3.09x)
avg_12_8x8_neon: 44.0 ( 5.79x)
avg_12_16x16_neon: 182.2 ( 4.80x)
avg_12_32x32_neon: 696.2 ( 5.46x)
avg_12_64x64_neon: 2548.2 ( 5.38x)
avg_12_128x128_neon: 10133.8 ( 5.19x)
avg_8_2x2_neon: 16.5 ( 1.98x)
avg_8_4x4_neon: 26.2 ( 2.93x)
avg_8_8x8_neon: 31.8 ( 8.55x)
avg_8_16x16_neon: 82.0 (12.02x)
avg_8_32x32_neon: 310.2 (14.12x)
avg_8_64x64_neon: 897.8 (18.26x)
avg_8_128x128_neon: 3608.5 (17.37x)
avg_10_2x2_neon: 19.5 ( 1.69x)
avg_10_4x4_neon: 28.0 ( 2.79x)
avg_10_8x8_neon: 34.8 ( 7.32x)
avg_10_16x16_neon: 119.8 ( 7.35x)
avg_10_32x32_neon: 444.2 ( 8.51x)
avg_10_64x64_neon: 1711.8 ( 8.00x)
avg_10_128x128_neon: 7065.2 ( 7.43x)
avg_12_2x2_neon: 19.5 ( 1.71x)
avg_12_4x4_neon: 24.2 ( 3.22x)
avg_12_8x8_neon: 33.8 ( 7.57x)
avg_12_16x16_neon: 120.2 ( 7.33x)
avg_12_32x32_neon: 442.5 ( 8.53x)
avg_12_64x64_neon: 1706.2 ( 8.02x)
avg_12_128x128_neon: 7010.0 ( 7.46x)
A72
avg_8_2x2_neon: 30.2 ( 1.48x)
avg_8_4x4_neon: 40.0 ( 3.10x)
avg_8_8x8_neon: 91.0 ( 4.14x)
avg_8_16x16_neon: 340.4 ( 3.92x)
avg_8_32x32_neon: 1220.7 ( 4.67x)
avg_8_64x64_neon: 5823.4 ( 3.88x)
avg_8_128x128_neon: 17430.5 ( 4.73x)
avg_10_2x2_neon: 34.0 ( 1.66x)
avg_10_4x4_neon: 45.2 ( 2.73x)
avg_10_8x8_neon: 97.5 ( 3.87x)
avg_10_16x16_neon: 317.7 ( 3.90x)
avg_10_32x32_neon: 1376.2 ( 4.21x)
avg_10_64x64_neon: 5228.1 ( 3.71x)
avg_10_128x128_neon: 16722.2 ( 4.17x)
avg_12_2x2_neon: 31.7 ( 1.76x)
avg_12_4x4_neon: 36.0 ( 3.44x)
avg_12_8x8_neon: 91.7 ( 4.10x)
avg_12_16x16_neon: 297.2 ( 4.13x)
avg_12_32x32_neon: 1400.5 ( 4.14x)
avg_12_64x64_neon: 5379.1 ( 3.51x)
avg_12_128x128_neon: 16715.7 ( 4.17x)
avg_8_2x2_neon: 33.7 ( 1.72x)
avg_8_4x4_neon: 45.5 ( 2.84x)
avg_8_8x8_neon: 65.0 ( 5.98x)
avg_8_16x16_neon: 171.0 ( 7.81x)
avg_8_32x32_neon: 558.2 (10.05x)
avg_8_64x64_neon: 2006.5 (10.61x)
avg_8_128x128_neon: 9158.7 ( 8.96x)
avg_10_2x2_neon: 38.0 ( 1.92x)
avg_10_4x4_neon: 53.2 ( 2.69x)
avg_10_8x8_neon: 95.2 ( 4.08x)
avg_10_16x16_neon: 243.0 ( 5.02x)
avg_10_32x32_neon: 891.7 ( 5.64x)
avg_10_64x64_neon: 3357.7 ( 5.60x)
avg_10_128x128_neon: 12411.7 ( 5.56x)
avg_12_2x2_neon: 34.7 ( 1.97x)
avg_12_4x4_neon: 53.2 ( 2.68x)
avg_12_8x8_neon: 91.7 ( 4.22x)
avg_12_16x16_neon: 239.0 ( 5.08x)
avg_12_32x32_neon: 895.7 ( 5.62x)
avg_12_64x64_neon: 3317.5 ( 5.67x)
avg_12_128x128_neon: 12358.5 ( 5.58x)
A53
avg_8_2x2_neon: 58.3 ( 1.41x)
avg_8_4x4_neon: 101.8 ( 2.21x)
avg_8_8x8_neon: 178.6 ( 4.53x)
avg_8_16x16_neon: 569.5 ( 5.01x)
avg_8_32x32_neon: 1962.5 ( 5.50x)
avg_8_64x64_neon: 8327.8 ( 5.18x)
avg_8_128x128_neon: 31631.3 ( 5.34x)
avg_10_2x2_neon: 54.5 ( 1.56x)
avg_10_4x4_neon: 88.8 ( 2.53x)
avg_10_8x8_neon: 163.6 ( 4.97x)
avg_10_16x16_neon: 550.5 ( 5.16x)
avg_10_32x32_neon: 1942.5 ( 5.64x)
avg_10_64x64_neon: 8783.5 ( 4.98x)
avg_10_128x128_neon: 32617.0 ( 5.25x)
avg_12_2x2_neon: 53.3 ( 1.66x)
avg_12_4x4_neon: 86.8 ( 2.61x)
avg_12_8x8_neon: 156.6 ( 5.12x)
avg_12_16x16_neon: 541.3 ( 5.25x)
avg_12_32x32_neon: 1955.3 ( 5.59x)
avg_12_64x64_neon: 8686.0 ( 5.06x)
avg_12_128x128_neon: 32487.5 ( 5.25x)
avg_8_2x2_neon: 39.5 ( 1.96x)
avg_8_4x4_neon: 65.3 ( 3.41x)
avg_8_8x8_neon: 168.8 ( 4.79x)
avg_8_16x16_neon: 348.0 ( 8.20x)
avg_8_32x32_neon: 1207.5 ( 8.98x)
avg_8_64x64_neon: 6032.3 ( 7.17x)
avg_8_128x128_neon: 22008.5 ( 7.69x)
avg_10_2x2_neon: 55.5 ( 1.52x)
avg_10_4x4_neon: 73.8 ( 3.08x)
avg_10_8x8_neon: 157.8 ( 5.12x)
avg_10_16x16_neon: 445.0 ( 6.43x)
avg_10_32x32_neon: 1587.3 ( 6.87x)
avg_10_64x64_neon: 7738.0 ( 5.68x)
avg_10_128x128_neon: 27813.8 ( 6.14x)
avg_12_2x2_neon: 48.3 ( 1.80x)
avg_12_4x4_neon: 77.0 ( 2.95x)
avg_12_8x8_neon: 161.5 ( 4.98x)
avg_12_16x16_neon: 433.5 ( 6.59x)
avg_12_32x32_neon: 1622.0 ( 6.75x)
avg_12_64x64_neon: 7844.5 ( 5.60x)
avg_12_128x128_neon: 26999.5 ( 6.34x)
Krzysztof
libavcodec/aarch64/vvc/inter.S | 124 ++++++++++++++++++++++++++++++++-
1 file changed, 121 insertions(+), 3 deletions(-)
diff --git a/libavcodec/aarch64/vvc/inter.S b/libavcodec/aarch64/vvc/inter.S
index 0edc861f97..c9d698ee29 100644
--- a/libavcodec/aarch64/vvc/inter.S
+++ b/libavcodec/aarch64/vvc/inter.S
@@ -217,13 +217,131 @@ function ff_vvc_\type\()_\bit_depth\()_neon, export=1
endfunc
.endm
-vvc_avg avg, 8
-vvc_avg avg, 10
-vvc_avg avg, 12
vvc_avg w_avg, 8
vvc_avg w_avg, 10
vvc_avg w_avg, 12
+.macro vvc_avg2 bit_depth
+function ff_vvc_avg_\bit_depth\()_neon, export=1
+ mov x10, #(VVC_MAX_PB_SIZE * 2)
+ movi v16.8h, #0
+ movi v17.16b, #255
+ ushr v17.8h, v17.8h, #(16 - \bit_depth)
+
+ cmp w4, #8
+ b.gt 16f
+ b.eq 8f
+ cmp w4, #4
+ b.eq 4f
+
+2: // width == 2
+ ldr s0, [x2]
+ subs w5, w5, #1
+ ldr s1, [x3]
+.if \bit_depth == 8
+ shadd v0.4h, v0.4h, v1.4h
+ sqrshrun v0.8b, v0.8h, #(15 - 1 - \bit_depth)
+ str h0, [x0]
+.else
+ shadd v0.4h, v0.4h, v1.4h
+ srshr v0.4h, v0.4h, #(15 - 1 - \bit_depth)
+ smax v0.4h, v0.4h, v16.4h
+ smin v0.4h, v0.4h, v17.4h
+ str s0, [x0]
+.endif
+ add x2, x2, #(VVC_MAX_PB_SIZE * 2)
+ add x3, x3, #(VVC_MAX_PB_SIZE * 2)
+ add x0, x0, x1
+ b.ne 2b
+ ret
+
+4: // width == 4
+ ldr d0, [x2]
+ subs w5, w5, #1
+ ldr d1, [x3]
+.if \bit_depth == 8
+ shadd v0.4h, v0.4h, v1.4h
+ sqrshrun v0.8b, v0.8h, #(15 - 1 - \bit_depth)
+ str s0, [x0]
+.else
+ shadd v0.4h, v0.4h, v1.4h
+ srshr v0.4h, v0.4h, #(15 - 1 - \bit_depth)
+ smax v0.4h, v0.4h, v16.4h
+ smin v0.4h, v0.4h, v17.4h
+ str d0, [x0]
+.endif
+ add x2, x2, #(VVC_MAX_PB_SIZE * 2)
+ add x3, x3, #(VVC_MAX_PB_SIZE * 2)
+ add x0, x0, x1
+ b.ne 4b
+ ret
+
+8: // width == 8
+ ldr q0, [x2]
+ subs w5, w5, #1
+ ldr q1, [x3]
+.if \bit_depth == 8
+ shadd v0.8h, v0.8h, v1.8h
+ sqrshrun v0.8b, v0.8h, #(15 - 1 - \bit_depth)
+ str d0, [x0]
+.else
+ shadd v0.8h, v0.8h, v1.8h
+ srshr v0.8h, v0.8h, #(15 - 1 - \bit_depth)
+ smax v0.8h, v0.8h, v16.8h
+ smin v0.8h, v0.8h, v17.8h
+ str q0, [x0]
+.endif
+ add x2, x2, #(VVC_MAX_PB_SIZE * 2)
+ add x3, x3, #(VVC_MAX_PB_SIZE * 2)
+ add x0, x0, x1
+ b.ne 8b
+ ret
+
+16: // width >= 16
+.if \bit_depth == 8
+ sub x1, x1, w4, sxtw
+.else
+ sub x1, x1, w4, sxtw #1
+.endif
+ sub x10, x10, w4, sxtw #1
+3:
+ mov w6, w4 // width
+1:
+ ldp q0, q1, [x2], #32
+ subs w6, w6, #16
+ ldp q2, q3, [x3], #32
+.if \bit_depth == 8
+ shadd v4.8h, v0.8h, v2.8h
+ shadd v5.8h, v1.8h, v3.8h
+ sqrshrun v0.8b, v4.8h, #6
+ sqrshrun2 v0.16b, v5.8h, #6
+ st1 {v0.16b}, [x0], #16
+.else
+ shadd v4.8h, v0.8h, v2.8h
+ shadd v5.8h, v1.8h, v3.8h
+ srshr v0.8h, v4.8h, #(15 - 1 - \bit_depth)
+ srshr v1.8h, v5.8h, #(15 - 1 - \bit_depth)
+ smax v0.8h, v0.8h, v16.8h
+ smax v1.8h, v1.8h, v16.8h
+ smin v0.8h, v0.8h, v17.8h
+ smin v1.8h, v1.8h, v17.8h
+ stp q0, q1, [x0], #32
+.endif
+ b.ne 1b
+
+ subs w5, w5, #1
+ add x2, x2, x10
+ add x3, x3, x10
+ add x0, x0, x1
+ b.ne 3b
+ ret
+endfunc
+.endm
+
+vvc_avg2 8
+vvc_avg2 10
+vvc_avg2 12
+
/* x0: int16_t *dst
* x1: const uint8_t *_src
* x2: ptrdiff_t _src_stride
--
2.47.2
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
To unsubscribe, visit link above, or email
ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".
next reply other threads:[~2025-02-19 17:59 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-19 17:40 Krzysztof Pyrkosz via ffmpeg-devel [this message]
2025-02-19 17:40 ` [FFmpeg-devel] [PATCH 2/2] avcodec/aarch64/vvc: Use rounding shift NEON instruction Krzysztof Pyrkosz via ffmpeg-devel
2025-02-20 8:08 ` Zhao Zhili
2025-02-20 7:20 ` [FFmpeg-devel] [PATCH 1/2] avcodec/aarch64/vvc: Optimize vvc_avg{8, 10, 12} Zhao Zhili
2025-02-20 18:49 ` Krzysztof Pyrkosz via ffmpeg-devel
2025-02-20 18:49 ` [FFmpeg-devel] [PATCH 2/2] avcodec/aarch64/vvc: Use rounding shift NEON instruction Krzysztof Pyrkosz via ffmpeg-devel
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20250219174010.3911-2-ffmpeg@szaka.eu \
--to=ffmpeg-devel@ffmpeg.org \
--cc=ffmpeg@szaka.eu \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Git Inbox Mirror of the ffmpeg-devel mailing list - see https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
This inbox may be cloned and mirrored by anyone:
git clone --mirror https://master.gitmailbox.com/ffmpegdev/0 ffmpegdev/git/0.git
# If you have public-inbox 1.1+ installed, you may
# initialize and index your mirror using the following commands:
public-inbox-init -V2 ffmpegdev ffmpegdev/ https://master.gitmailbox.com/ffmpegdev \
ffmpegdev@gitmailbox.com
public-inbox-index ffmpegdev
Example config snippet for mirrors.
AGPL code for this site: git clone https://public-inbox.org/public-inbox.git