[x264-devel] Re: question : x264 bug...

[Sergey A. Sablin]

I belive you are using simd optimized version, so before using floating
point you should clear FPU state with x264_emms(). But this will slowdown
the performance, cause emms take about 80 tacts of CPU (at least on Intel)
 
Sergey.


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From: x264-devel-bounce at videolan.org [mailto:x264-devel-bounce at videolan.org]
On Behalf Of Ikseong Bae
Sent: Thursday, June 30, 2005 9:17 AM
To: x264-devel at videolan.org
Subject: [x264-devel] question : x264 bug...


I found the x264's bug.
 
encoder/anaysyse.c...
 
static void x264_mb_analyse_inter_p16x16( x264_t *h, x264_mb_analysis_t *a )

{

 double     f64Data=0;

 f64Data = f64Data + 2;

}
 
In X264, I declared double type variable.
 
Whe the function is called in first, f64Data's value is 2.
But the fucnion is called in second, f64Data value is crashed !
 
And I decalred int type variable.
static void x264_mb_analyse_inter_p16x16( x264_t *h, x264_mb_analysis_t *a )

{

 int     n32Data=0;

n32Data = n32Data + 2;

}
 
Above the source code is good. First, second, third... good
 
I don't know the above problem.
 
 
Best regards.
 
Bae
 
 



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