Make fma use of Dekker and Knuth algorithms use round-to-nearest (bug 14796)

[David Miller]

From: "Joseph S. Myers" <joseph@codesourcery.com>
Date: Fri, 2 Nov 2012 02:14:49 +0000

> [This patch includes architecture changes, see below; most are pretty
> mechanical, but the SPARC changes could perhaps do with review /
> testing.]

I've been without power for 5 days until about 15 minutes ago,
so it may take some time for me to test this.

Just FYI...