[FFmpeg-cvslog] swscale/rgb2rgb2: rework RISC-V V shuffle_bytes_{1230,3012}
Rémi Denis-Courmont
git at videolan.org
Fri Jul 21 22:18:15 EEST 2023
ffmpeg | branch: master | Rémi Denis-Courmont <remi at remlab.net> | Tue Jul 18 20:25:13 2023 +0300| [c2b38619c081658b303d1669155803d2aebf3f6a] | committer: Rémi Denis-Courmont
swscale/rgb2rgb2: rework RISC-V V shuffle_bytes_{1230,3012}
This avoids strided loads.
Before:
shuffle_bytes_1230_rvv_i32: 308.7
shuffle_bytes_3012_rvv_i32: 308.7
After:
shuffle_bytes_1230_rvv_i32: 46.7
shuffle_bytes_3012_rvv_i32: 46.7
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=c2b38619c081658b303d1669155803d2aebf3f6a
---
libswscale/riscv/rgb2rgb_rvv.S | 30 ++++++++++++++++++++----------
1 file changed, 20 insertions(+), 10 deletions(-)
diff --git a/libswscale/riscv/rgb2rgb_rvv.S b/libswscale/riscv/rgb2rgb_rvv.S
index 366f80c1c3..0ac3afff7c 100644
--- a/libswscale/riscv/rgb2rgb_rvv.S
+++ b/libswscale/riscv/rgb2rgb_rvv.S
@@ -49,19 +49,29 @@ func ff_shuffle_bytes_2103_rvv, zve32x
endfunc
func ff_shuffle_bytes_1230_rvv, zve32x
- addi t1, a0, 2
- addi t2, a0, 3
- addi t3, a0, 0
- addi a0, a0, 1
- j 1b
+ li t1, 24
+ li t2, 8
+ j 3f
endfunc
func ff_shuffle_bytes_3012_rvv, zve32x
- addi t1, a0, 0
- addi t2, a0, 1
- addi t3, a0, 2
- addi a0, a0, 3
- j 1b
+ li t1, 8
+ li t2, 24
+3:
+ srai a2, a2, 2
+4:
+ vsetvli t0, a2, e32, m8, ta, ma
+ vle32.v v8, (a0)
+ sub a2, a2, t0
+ vsll.vx v16, v8, t1
+ sh2add a0, t0, a0
+ vsrl.vx v8, v8, t2
+ vor.vv v16, v16, v8
+ vse32.v v16, (a1)
+ sh2add a1, t0, a1
+ bnez a2, 4b
+
+ ret
endfunc
func ff_shuffle_bytes_3210_rvv, zve32x
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