Resolve floating point exception with frame_init_lowres mmx

In some cases, the mmx version of frame_init_lowres could leave the FPU uninitialized for use in ratecontrol, resulting in floating point exceptions.
Since frame_init_lowres is such a time-consuming function, an emms was just put at the end, since it costs almost nothing compared to the total time of frame_init_lowres.

diff --git a/common/x86/mc-a2.asm b/common/x86/mc-a2.asm
index 47da6a29c996cb6e7b25612f2c1c4d459ea74426..50aa63e3d4b12733859bbbc86c7d31991ab9c664 100644 (file)
--- a/common/x86/mc-a2.asm
+++ b/common/x86/mc-a2.asm
@@ -643,6 +643,7 @@ cglobal x264_frame_init_lowres_core_%1, 6,7
     dec    dword r8m
     jg .vloop
     ADD      rsp, 2*push_size
+    emms
     RET
 %endmacro ; FRAME_INIT_LOWRES