virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2025-10-30 23:18:11 +02:00
Code Issues Releases Activity

avcodec/x86/h264_idct: Fix incorrect xmm spilling on win64

Browse Source 
Broken in afa471d0ef. It just happened
to work before due to x86inc.asm previously performing XMM spills in
INIT_MMX mode which was more of a bug than an intentional feature.
This commit is contained in:
Henrik Gramner
2024-03-24 20:04:17 +01:00
parent 316239096b
commit 7c003b63c8
1 changed files with 3 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
libavcodec/x86/h264_idct.asm
View File

@@ -716,11 +716,9 @@ RET
%endif
%endmacro
%macro IDCT_DC_DEQUANT 1
cglobal h264_luma_dc_dequant_idct, 3, 4, %1
; manually spill XMM registers for Win64 because
; the code here is initialized with INIT_MMX
WIN64_SPILL_XMM %1
INIT_XMM sse2
cglobal h264_luma_dc_dequant_idct, 3, 4, 7
INIT_MMX cpuname
movq m3, [r1+24]
movq m2, [r1+16]
movq m1, [r1+ 8]
@@ -757,10 +755,6 @@ cglobal h264_luma_dc_dequant_idct, 3, 4, %1
movd xmm6, t1d
DEQUANT_STORE xmm6
RET
%endmacro
INIT_MMX sse2
IDCT_DC_DEQUANT 7
%ifdef __NASM_VER__
%if __NASM_MAJOR__ >= 2 && __NASM_MINOR__ >= 4