From: "Joseph S. Myers" <joseph@codesourcery.com>
To: Richard Henderson <rth@twiddle.net>
Cc: libc-ports@sourceware.org, David Miller <davem@davemloft.net>
Subject: Re: Ports state for 2.16 regarding global changes
Date: Fri, 15 Jun 2012 18:56:00 -0000 [thread overview]
Message-ID: <Pine.LNX.4.64.1206151851490.14697@digraph.polyomino.org.uk> (raw)
In-Reply-To: <4FDB708C.6070801@twiddle.net>
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
prev parent reply other threads:[~2012-06-15 18:56 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-15 15:53 Joseph S. Myers
2012-06-15 16:18 ` Mark Salter
2012-06-15 16:41 ` Joseph S. Myers
2012-06-15 17:28 ` Richard Henderson
2012-06-15 18:56 ` Joseph S. Myers [this message]
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