fpgetround man page on MirBSD

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FPGETMASK(3)		   BSD Programmer's Manual		  FPGETMASK(3)

NAME
     fpgetmask, fpgetround, fpgetsticky, fpsetmask, fpsetround, fpsetsticky -
     IEEE FP mode control

SYNOPSIS
     #include <ieeefp.h>

     fp_except
     fpgetmask(void);

     fp_rnd
     fpgetround(void);

     fp_except
     fpgetsticky(void);

     fp_except
     fpsetmask(fp_except mask);

     fp_rnd
     fpsetround(fp_rnd rnd_dir);

     fp_except
     fpsetsticky(fp_except sticky);

DESCRIPTION
     A rounding mode is one of FP_RZ, FP_RM, FP_RN, or FP_RP, for rounding to-
     wards zero, rounding (Minus infinity) down, rounding to nearest, and
     rounding (Plus infinity) up. The default mode is FP_RN.

     An fp_except value is a bitmask specifying an exception type and contain-
     ing any of the values listed below.

	   FP_X_INV	 Invalid Operation
	   FP_X_DZ	 Division by zero
	   FP_X_OFL	 Overflow
	   FP_X_UFL	 Underflow
	   FP_X_IMP	 Imprecision (inexact)
	   FP_X_IOV	 Integer Overflow

     The fpsetmask() function will cause future operations with the specified
     result status to raise the SIGFPE exception. The fpsetround() function
     will cause future operations to use the specified dynamic mode.

     Note:   On some architectures, instructions can optionally specify static
	     rounding modes and exception enables that will supersede the
	     specified dynamic mode. On other architectures, these features
	     may not be fully supported.

     The fpsetsticky() function will set or clear the specified exception his-
     tory bits.

RETURN VALUES
     The fpgetround() and fpsetround() functions return the (previous) round-
     ing mode. The fpgetmask(), fpsetmask(), fpgetsticky(), and fpsetsticky()
     functions return the (previous) exception mask and exception history
     bits.

SEE ALSO
     sigaction(2)

MirOS BSD #10-current		April 29, 1999				     1
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