PC Extra Super CD 1998 January/PCPLUS131.iso/DJGPP/V2/DJLSR201.ZIP/src/libc/pc_hw/fpu/stat87.txh

Text File | 1995-07-10 | 1.1 KB | 33 lines

@c ----------------------------------------------------------------------
@node _status87, cpu
@subheading Syntax

@example
#include <float.h>

unsigned int _status87(void);
@end example

@subheading Description

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

@example
---- ---- ---- ---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
@end example