IA32: printing FP register variables

[Jeffrey A Law]

  In message < np3dyxu2ua.fsf@zwingli.cygnus.com >you write:
  > I don't have an MMX manual handy, but it seems like a much easier case
  > than the FPU, since the registers don't shift around every time you do
  > an operation.
Correct.  While the MMX registers are overloaded on the FPU registers, 
they do not stack like FP operations do.

  > Well, the reason this problem seems hard to me is exactly because the
  > position of items relative to the top of the stack *will* change,
  > whenever you execute instructions like FILD, FDIVP, etc.  If they were
  > a constant distance, then we could simply assign register numbers to
  > ST(0) -- ST(7) in the usual way, and everything would work.
Precisely.

jeff