From: address@nospicedham.not.available   
      
   Moderator, Frank : I'm not sure if questions about the x87 FPU are permitted   
   here.  If not than please just discard.  If they are than please remove this   
   line. :-)   
      
   Hello all,   
      
   I've just been writing some basic code to parse a simple float, and realized   
   that I had no idea how to check if the x87 FPU was empty after I was done -   
   as a simple measure to check if my code cleaned up correctly.   
      
   I've been looking at using the ST bits in the FPU status word, but had to   
   find that they (unexpectedly) didn't end at zero after I done my thing :   
      
   minimal example:   
      
   fld1    ;Load   
   fld1   
      
   fstp st(2)   ;Swap ST(0) and ST(1) <-- this is the culprit   
      
   fstp st(0)    ;Discard   
   fstp st(0)   
      
   At this point all the ST bits are set, indicating a minus one, not zero.   
      
   My questions at this point are:   
      
   1) Have I done anything wrong in the above ?   I don't think so, but "you   
   never know" ....   
      
   2) How do I, for debugging purposes, check the FPU stack ?   
      
   Regards,   
   Rudy Wieser   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)