[FFmpeg-devel] [PATCHv4 4/4] lavc/huffyuvdsp: optimise RVV vtype for add_hfyu_left_pred_bgr32

[Rémi Denis-Courmont]

T-Head C908:
add_hfyu_left_pred_bgr32_c:       237.5
add_hfyu_left_pred_bgr32_rvv_i32: 173.5 (before)
add_hfyu_left_pred_bgr32_rvv_i32: 110.0 (after)
---
 libavcodec/riscv/huffyuvdsp_rvv.S | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/libavcodec/riscv/huffyuvdsp_rvv.S b/libavcodec/riscv/huffyuvdsp_rvv.S
index 9c4434907d..d334f5c6d0 100644
--- a/libavcodec/riscv/huffyuvdsp_rvv.S
+++ b/libavcodec/riscv/huffyuvdsp_rvv.S
@@ -36,8 +36,10 @@ func ff_add_int16_rvv, zve32x
         ret
 endfunc
 
-func ff_add_hfyu_left_pred_bgr32_rvv, zve32x
-        vsetivli zero, 4, e8, m1, ta, ma
+func ff_add_hfyu_left_pred_bgr32_rvv, zve32x, zbb
+        vtype_ivli t1, 4, e8, ta, ma
+        li      t0, 4
+        vsetvl  zero, t0, t1
         vle8.v  v8, (a3)
         sh2add  a2, a2, a1
 1:
-- 
2.43.0