From: "Rémi Denis-Courmont" <remi@remlab.net>
To: ffmpeg-devel@ffmpeg.org
Subject: [FFmpeg-devel] [PATCH] lavc/alacdsp: unroll RISC-V V loops
Date: Thu, 13 Jul 2023 23:23:56 +0300
Message-ID: <20230713202356.11127-1-remi@remlab.net> (raw)
This increases the group multiplier as per T-Head C910 benchmarks:
alac_append_extra_bits_mono_c: 803.0
alac_append_extra_bits_stereo_c: 1604.2
alac_decorrelate_stereo_c: 1077.5
LMUL=1
alac_append_extra_bits_mono_rvv_i32: 418.2
alac_append_extra_bits_stereo_rvv_i32: 693.2
alac_decorrelate_stereo_rvv_i32: 673.5
LMUL=2
alac_append_extra_bits_mono_rvv_i32: 382.2
alac_append_extra_bits_stereo_rvv_i32: 648.2
alac_decorrelate_stereo_rvv_i32: 542.7
LMUL=4
alac_append_extra_bits_mono_rvv_i32: 241.5
alac_append_extra_bits_stereo_rvv_i32: 512.7
alac_decorrelate_stereo_rvv_i32: 364.2
LMUL=8
alac_append_extra_bits_mono_rvv_i32: 239.7
alac_append_extra_bits_stereo_rvv_i32: 497.2
alac_decorrelate_stereo_rvv_i32: 426.7
---
libavcodec/riscv/alacdsp_rvv.S | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/libavcodec/riscv/alacdsp_rvv.S b/libavcodec/riscv/alacdsp_rvv.S
index 8fbe3fbe77..8efb04e0c8 100644
--- a/libavcodec/riscv/alacdsp_rvv.S
+++ b/libavcodec/riscv/alacdsp_rvv.S
@@ -25,7 +25,7 @@ func ff_alac_decorrelate_stereo_rvv, zve32x
ld a4, 8(a0)
ld a0, 0(a0)
1:
- vsetvli t0, a1, e32, m1, ta, ma
+ vsetvli t0, a1, e32, m4, ta, ma
vle32.v v24, (a4)
sub a1, a1, t0
vle32.v v16, (a0)
@@ -47,7 +47,7 @@ func ff_alac_append_extra_bits_mono_rvv, zve32x
ld a0, (a0)
ld a1, (a1)
1:
- vsetvli t0, a4, e32, m1, ta, ma
+ vsetvli t0, a4, e32, m8, ta, ma
vle32.v v16, (a0)
sub a4, a4, t0
vle32.v v24, (a1)
@@ -67,7 +67,7 @@ func ff_alac_append_extra_bits_stereo_rvv, zve32x
ld a7, 8(a1)
ld a1, (a1)
1:
- vsetvli t0, a4, e32, m1, ta, ma
+ vsetvli t0, a4, e32, m8, ta, ma
vle32.v v16, (a0)
sub a4, a4, t0
vle32.v v0, (a6)
--
2.40.1
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