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new c1aed85491 avcodec/x86/h264_idct: Avoid spilling register unnecessarily
c1aed85491 is described below
commit c1aed854915bc5d1125e5616da3f798013aff6e5
Author: Andreas Rheinhardt <[email protected]>
AuthorDate: Fri Mar 27 22:10:03 2026 +0100
Commit: Andreas Rheinhardt <[email protected]>
CommitDate: Tue Mar 31 17:31:58 2026 +0200
avcodec/x86/h264_idct: Avoid spilling register unnecessarily
It is only needed in the unlikely codepath. The ordinary one
only uses six xmm registers.
Signed-off-by: Andreas Rheinhardt <[email protected]>
---
libavcodec/x86/h264_idct.asm | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/libavcodec/x86/h264_idct.asm b/libavcodec/x86/h264_idct.asm
index 6ae8202748..0ced412a3e 100644
--- a/libavcodec/x86/h264_idct.asm
+++ b/libavcodec/x86/h264_idct.asm
@@ -647,7 +647,7 @@ RET
%endmacro
INIT_XMM sse2
-cglobal h264_luma_dc_dequant_idct, 3, 4, 7
+cglobal h264_luma_dc_dequant_idct, 3, 4, 6
movq m3, [r1+24]
movq m2, [r1+16]
movq m1, [r1+ 8]
@@ -683,6 +683,7 @@ cglobal h264_luma_dc_dequant_idct, 3, 4, 7
RET
.big_qmul:
bsr t0d, t3d
+ WIN64_PUSH_XMM 7
add t3d, 128 << 16
mov t1d, 7
cmp t0d, t1d
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