fpp_set_ieee_underflow_mode()

FPP_$SET_IEEE_UNDERFLOW_MODE      Domain/OS       FPP_$SET_IEEE_UNDERFLOW_MODE


NAME
     fpp_$set_ieee_underflow_mode - set the underflow mode

SYNOPSIS (C)
     #include <apollo/base.h>
     #include <apollo/fpp.h>

     void fpp_$set_ieee_underflow_mode(
          boolean ieee_mode,
          status_$t *status)

SYNOPSIS (Pascal)
     %include '/sys/ins/base.ins.pas';
     %include '/sys/ins/fpp.ins.pas';

     procedure fpp_$set_ieee_underflow_mode(
          in ieee_mode: boolean;
          out status: status_$t);

SYNOPSIS (FORTRAN)
     %include '/sys/ins/base.ins.ftn'
     %include '/sys/ins/fpp.ins.ftn'

           logical ieee_mode
           integer*4 status

           call fpp_$set_ieee_underflow_mode(ieee_mode, status)

DESCRIPTION
     Fpp_$set_ieee_underflow_mode determines the underflow mode used by the
     floating-point unit.  IEEE-754 underflow mode is the default underflow
     mode for the DN10000 series.  If called on a machine that does not sup-
     port multiple underflow modes, fpp_$set_ieee_underflow_mode returns with
     fpp_$unsupported_operation in status.

     ieee_mode
          If true, the FPU will operate in full IEEE-754 denormalized mode.
          If false, underflow will be from the smallest normalized value to 0.

     status
          The completion status.
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