On Tue, 21 Mar 2000, David Malone wrote:
> Is there a way of setting the control word which is in any sense
> portable? Most machines I've looked at seem to have no documented
> way of setting what exceptions should be masked, and each one that
> does has a different set of calls.
No. C99 provides an (optional) portable way of setting the rounding
mode (fesetround() corresponds to fpsetround()), but doesn't provide
a portable way to set the precision or exception masks. It only
provides fesetenv(), and the only portable args for fesetenv() are
FE_DFL_ENV (which gives the default environment) and a pointer to
a result filled in by a previous call to fegetenv().
Bruce
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