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_status87
=========

Syntax
------

     #include <float.h>
     
     unsigned int _status87(void);

Description
-----------

Returns the status word of the FPU, which indicate the results of the
most recently completed FPU operation:

     ---- ---- ---- ---X = SW_INVALID - invalid operation
     ---- ---- ---- --X- = SW_DENORMAL - denormalized operand
     ---- ---- ---- -X-- = SW_ZERODIVIDE - division by zero
     ---- ---- ---- X--- = SW_OVERFLOW - overflow
     ---- ---- ---X ---- = SW_UNDERFLOW - underflow
     ---- ---- --X- ---- = SW_INEXACT - loss of precision
     ---- ---- -X-- ---- = SW_STACKFAULT - stack over/under flow
     ---- ---- X--- ---- = SW_ERRORSUMMARY - set if any errors
     -X-- -XXX ---- ---- = SW_COND - condition code
     ---- ---X ---- ---- = SW_C0
     ---- --X- ---- ---- = SW_C1
     ---- -X-- ---- ---- = SW_C2
     -X-- ---- ---- ---- = SW_C3
     --XX X--- ---- ---- = SW_TOP - top of stack (use SW_TOP_SHIFT to shift it)
     X--- ---- ---- ---- = SW_BUSY - fpu is busy