From: "Rémi Denis-Courmont" <remi@remlab.net>
To: ffmpeg-devel@ffmpeg.org
Subject: [FFmpeg-devel] [PATCH] lavu/fixed_dsp: unroll RISC-V V loop
Date: Fri, 14 Jul 2023 22:54:36 +0300
Message-ID: <20230714195436.71962-1-remi@remlab.net> (raw)
Before:
butterflies_fixed_c: 804.7
butterflies_fixed_rvv_i32: 348.2
After:
butterflies_fixed_rvv_i32: 308.7
---
libavutil/riscv/fixed_dsp_rvv.S | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavutil/riscv/fixed_dsp_rvv.S b/libavutil/riscv/fixed_dsp_rvv.S
index a91316e1da..6e13395294 100644
--- a/libavutil/riscv/fixed_dsp_rvv.S
+++ b/libavutil/riscv/fixed_dsp_rvv.S
@@ -23,7 +23,7 @@
// (a0) = (a0) + (a1), (a1) = (a0) - (a1) [0..a2-1]
func ff_butterflies_fixed_rvv, zve32x
1:
- vsetvli t0, a2, e32, m1, ta, ma
+ vsetvli t0, a2, e32, m4, ta, ma
vle32.v v16, (a0)
sub a2, a2, t0
vle32.v v24, (a1)
--
2.40.1
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