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Re: Ping Re: soft-fp: Support rsigned == 2 in _FP_TO_INT
- From: "Joseph S. Myers" <joseph at codesourcery dot com>
- To: Carlos O'Donell <carlos at redhat dot com>
- Cc: <libc-alpha at sourceware dot org>
- Date: Tue, 30 Sep 2014 17:28:55 +0000
- Subject: Re: Ping Re: soft-fp: Support rsigned == 2 in _FP_TO_INT
- Authentication-results: sourceware.org; auth=none
- References: <Pine dot LNX dot 4 dot 64 dot 1409232040060 dot 8132 at digraph dot polyomino dot org dot uk> <Pine dot LNX dot 4 dot 64 dot 1409301439570 dot 15186 at digraph dot polyomino dot org dot uk> <542AC26E dot 5070906 at redhat dot com>
On Tue, 30 Sep 2014, Carlos O'Donell wrote:
> On 09/30/2014 10:40 AM, Joseph S. Myers wrote:
> > Ping. This patch
> > <https://sourceware.org/ml/libc-alpha/2014-09/msg00544.html> is pending
> > review.
>
> Who do we expect to review these patches? There is a considerable amount of
> work required to review soft-fp, and at present I find it hard to be motivated
> for anything but hard float.
Well, soft-fp is used in libgcc for x86/x86_64 for __float128 support, for
example, and in the Linux kernel on various architectures both for
emulation on soft-float processors and to handle traps to the kernel on
processors where some floating-point cases are handled in hardware but
various special cases trap to software - the feature this particular patch
adds is used in the kernel for Alpha (see
<https://sourceware.org/ml/libc-alpha/2013-10/msg00347.html> regarding the
desire to resync the kernel with glibc soft-fp again). (Some
architectures have their own floating-point emulation implementations in
the kernel for whatever reason, rather than using soft-fp.)
--
Joseph S. Myers
joseph@codesourcery.com