[FFmpeg-cvslog] lavc/h264idct: fix RISC-V group multiplier

[Rémi Denis-Courmont]

ffmpeg | branch: release/7.1 | Rémi Denis-Courmont <remi at remlab.net> | Sat Nov 16 16:22:49 2024 +0200| [f686cf77db3d3d556072c8b557deca366ccfe7dd] | committer: Rémi Denis-Courmont

lavc/h264idct: fix RISC-V group multiplier

After the branch, the expected SEW/LMUL ratio is 1 byte/vector.
So we have to set the same ratio before branching (QEMU does not care,
but real hardware does).

(cherry picked from commit bbb0fdedb78c289f1d3ce3fccb000f031ccfa748)

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=f686cf77db3d3d556072c8b557deca366ccfe7dd
---

 libavcodec/riscv/h264idct_rvv.S | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/libavcodec/riscv/h264idct_rvv.S b/libavcodec/riscv/h264idct_rvv.S
index d2f77a5b47..b1e06d93f7 100644
--- a/libavcodec/riscv/h264idct_rvv.S
+++ b/libavcodec/riscv/h264idct_rvv.S
@@ -644,7 +644,7 @@ func ff_h264_idct4_add\type\()_\depth\()_rvv, zve32x
         sd      a4, 24(sp)
         ld      a0,  0(a0)                               # dest[0]
         addi    a1, a1, 16 * 4                           # &block_offset[16]
-        vsetivli    zero, 4, e8, mf4, ta, ma
+        vsetivli    zero, 4, e8, m1, ta, ma
         jal     .Lidct4_add4_\depth\()_rvv
 
         ld      a4, 24(sp)                               # nnzc
@@ -655,7 +655,7 @@ func ff_h264_idct4_add\type\()_\depth\()_rvv, zve32x
         ld      a0,  8(a0)                               # dest[1]
         lla     t0, ff_h264_scan8 + 32
 .ifc \type, 8_422
-        vsetivli    zero, 4, e8, mf4, ta, ma
+        vsetivli    zero, 4, e8, m1, ta, ma
         jal     .Lidct4_add4_\depth\()_rvv
 
         ld      a4, 24(sp)                               # nnzc
@@ -665,7 +665,7 @@ func ff_h264_idct4_add\type\()_\depth\()_rvv, zve32x
         addi    a1, t5, (-8 - 4) * 4                     # &block_offset[24]
         ld      a0,  0(a0)                               # dest[0]
         lla     t0, ff_h264_scan8 + 24
-        vsetivli    zero, 4, e8, mf4, ta, ma
+        vsetivli    zero, 4, e8, m1, ta, ma
         jal     .Lidct4_add4_\depth\()_rvv
 
         ld      a4, 24(sp)                               # nnzc
@@ -679,7 +679,7 @@ func ff_h264_idct4_add\type\()_\depth\()_rvv, zve32x
         ld      ra,  8(sp)
         ld      s0,  0(sp)
         addi    sp, sp, 32
-        vsetivli    zero, 4, e8, mf4, ta, ma
+        vsetivli    zero, 4, e8, m1, ta, ma
         j       .Lidct4_add4_\depth\()_rvv
 endfunc
 .endm