[vorbis-dev] RE: vorbis under win32

[macik]

> 4.)
>> I found different behaviour between gcc and msvc when dividing very small doubles (like 2.13e-312)

My fault, there was something I missed. I can't see "very small doubles (like 2.13e-312)" anymore. These "small doubles" are really true zeros.

So different behaviour is:

int val=rint(data[i]/curve[i]);

when curve[i] is zero then
in gcc:
 val will become -(2^15)
in MSVC:
 val will become 0

I'm surprised of this un-catched division by zero.

to avoid of this we can simply check

int val;
if (curve[i]==0) {
  val=-16; // emulate gcc behaviour or
//  val=0; // emulate msvc behaviour
}
else {
  val=rint(data[i]/curve[i]);
  if(val>16)val=16;
  if(val<-16)val=-16;
};

For now all inconsistencies are solved and win32 code produces exactly the same bitstreams like linux code (I’m curious of VQ code).

bye
macik
(eof)
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