[FFmpeg-cvslog] lavu/riscv: fix off-by-one in bit-magnitude clip
Rémi Denis-Courmont
git at videolan.org
Fri Sep 16 00:11:33 EEST 2022
ffmpeg | branch: master | Rémi Denis-Courmont <remi at remlab.net> | Thu Sep 15 21:26:48 2022 +0300| [6df3ad9687c41d17094ae5d16b4904f50338e0c4] | committer: James Almer
lavu/riscv: fix off-by-one in bit-magnitude clip
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=6df3ad9687c41d17094ae5d16b4904f50338e0c4
---
libavutil/riscv/intmath.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/libavutil/riscv/intmath.h b/libavutil/riscv/intmath.h
index 3263a79dc4..45bce9a0e7 100644
--- a/libavutil/riscv/intmath.h
+++ b/libavutil/riscv/intmath.h
@@ -61,8 +61,8 @@ static av_always_inline av_const int32_t av_clipl_int32_rvi(int64_t a)
#define av_clip_intp2 av_clip_intp2_rvi
static av_always_inline av_const int av_clip_intp2_rvi(int a, int p)
{
- const int shift = 32 - p;
- int b = (a << shift) >> shift;
+ const int shift = 31 - p;
+ int b = ((int)(((unsigned)a) << shift)) >> shift;
if (a != b)
b = (a >> 31) ^ ((1 << p) - 1);
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