File:  [Research Unix] / researchv10dc / dist / man / v3 / man2 / fpe.2
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Tue Apr 24 17:21:34 2018 UTC (8 years, 1 month ago) by root
Branches: belllabs, MAIN
CVS tags: researchv10, HEAD
researchv10 Dan Cross

.pa 1
.he 'FPE (II)'9/2/72'FPE (II)'
.ti 0
NAME		fpe -- set floating exception handling
.sp
.ti 0
SYNOPSIS	sys fpe; arg / fpe = 40. not in assembler
.sp
.ti 0
DESCRIPTION	This call
allows one to catch traps resulting from
floating point exceptions.
Arg___ is a location within the program; floating exception traps
are sent to that location.
The normal effect of floating exception traps may be restored by giving
an arg___ equal to 0.
.sp
To return after catching the
fpe___
trap, execute the rti___ instruction.
.sp
.ti 0
SEE ALSO	--
.sp
.ti 0
DIAGNOSTICS	--
.sp
.ti 0
BUGS		The
floating point exception (FEC) register
is not saved per process.
Examining this register for possible
remedial action after a floating point
exception trap is not guaranteed to work.

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