[FFmpeg-cvslog] libavcodec: aarch64: Don't clobber v8 in the h%4 case in ff_pix_abs16_xy2_neon

[Martin Storsjö]

ffmpeg | branch: master | Martin Storsjö <martin at martin.st> | Tue Jul 12 23:51:36 2022 +0300| [02e7853fd94aa78a5f0990ee0105a291172a5eab] | committer: Martin Storsjö

libavcodec: aarch64: Don't clobber v8 in the h%4 case in ff_pix_abs16_xy2_neon

Checkasm doesn't currently test this codepath.

Signed-off-by: Martin Storsjö <martin at martin.st>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=02e7853fd94aa78a5f0990ee0105a291172a5eab
---

 libavcodec/aarch64/me_cmp_neon.S | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavcodec/aarch64/me_cmp_neon.S b/libavcodec/aarch64/me_cmp_neon.S
index e49d049fc2..31db3793d9 100644
--- a/libavcodec/aarch64/me_cmp_neon.S
+++ b/libavcodec/aarch64/me_cmp_neon.S
@@ -189,11 +189,11 @@ function ff_pix_abs16_xy2_neon, export=1
         urshr           v16.8h, v16.8h, #2          // shift right by 2 0..7 (rounding shift right)
         urshr           v17.8h, v17.8h, #2          // shift right by 2 8..15
 
-        uxtl2           v8.8h, v1.16b               // 8->16 bits pix1 8..15
+        uxtl2           v7.8h, v1.16b               // 8->16 bits pix1 8..15
         uxtl            v1.8h, v1.8b                // 8->16 bits pix1 0..7
 
         uabd            v6.8h, v1.8h, v16.8h        // absolute difference 0..7
-        uaba            v6.8h, v8.8h, v17.8h        // absolute difference accumulate 8..15
+        uaba            v6.8h, v7.8h, v17.8h        // absolute difference accumulate 8..15
         mov             v2.16b, v18.16b             // pix3 -> pix2
         mov             v3.16b, v19.16b             // pix3+1 -> pix2+1
         uaddlv          s6, v6.8h                   // add up accumulator in v6