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Re: Ports state for 2.16 regarding global changes
On Fri, 15 Jun 2012, Richard Henderson wrote:
> On 2012-06-15 08:52, Joseph S. Myers wrote:
> > (c) sysdeps/alpha/soft-fp/sfp-machine.h is missing a definition of
> > FP_TRAPPING_EXCEPTIONS.
>
> What's this one supposed to do? There's no commentary anywhere.
It expands to a bitmask of those exceptions (FP_EX_* values) for which
trapping (sending a signal) is enabled. This is only relevant for cases
of exact underflow (where a signal is sent if trapping on underflow is
enabled, but otherwise the underflow flag is not raised).
Typically a masked version of the floating-point control register, shifted
to move the trap-enabled bits into the positions of the exception-raised
bits, is right.
--
Joseph S. Myers
joseph@codesourcery.com