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   comp.lang.asm.x86      Ahh, the lost art of x86 assembly      4,675 messages   

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   Message 4,410 of 4,675   
   R.Wieser to All   
   Re: FPU (x87) code debugging.   
   09 Aug 21 09:27:16   
   
   From: address@nospicedham.not.available   
      
   Robert,   
      
   > Well, please make sure the pointer is correct   
      
   :-) And how do you propose that should be done ?     It sounds like a great   
   idea, but ...   
      
   > (trash easily gets caught in the upper bits in mixed-mode)   
      
   Somewhere along the line I forgot to mention that I was programming in   
   32-bit mode (under Win XP).  So, no mixed mode and no trash in the upper   
   bits.   
      
   > Ah, but circularity is achieved by masking, 8=0 when masked at 3bits.   
      
   Well ...   It /can/ be achieved that way, but only under certain conditions   
   (related to origin and size). :-)   
      
   The problem has been located though : I simply used the wrong R/M value   
   while hand-encoding the FXSAVE command (likely mixing up the 16 bit table   
   with the 32 bit one).   IOW, I was providing the target addres in a certain   
   register while the command expected it in another register/form.   
      
   Regards,   
   Rudy Wieser   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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