Date: Mon, 29 Dec 2008 18:43:39 -0700 (MST) From: "M. Warner Losh" <imp@bsdimp.com> To: arm@FreeBSD.org Subject: Fw: Cirrus EP93xx MaverickCrunch GCC 4.3.2 patches Message-ID: <20081229.184339.1791045642.imp@bsdimp.com>
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FYI. I've not evaluated these patches, but thought people here might
be interested in them.
Warner
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Date: Tue, 30 Dec 2008 01:04:14 +0000
From: "Martin Guy" <martinwguy@yahoo.it>
To: "debian-arm@lists.debian.org" <debian-arm@lists.debian.org>,
port-arm@NetBSD.org, linux-arm@lists.arm.linux.org.uk
Subject: Cirrus EP93xx MaverickCrunch GCC 4.3.2 patches
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Hi all
Thought I'd broadcast this more widely in the hope of catching more
Crunh-weary folks ;)
---------- Forwarded message ----------
From: Martin Guy <martinwguy@yahoo.it>
Date: Dec 18, 2008 2:39 PM
Subject: Re: in at the deep end
To: linux-cirrus@freelists.org
Ok, I have working Maverick patches for gcc-4.3.2.
Main differences from the Futaris 4.1.2 and 4.2.0 ones:
- no negative impact on speed of regular ARM code
- addition of -mieee flag for full IEEE precision at about half of full speed
- generated floating point code is about 10% faster
See martinwguy.co.uk/martin/crunch for patches, native compiler
tarballs and description.
While I've compiled and run testsuite of various real programs, the
infamous "paranoia" IEEE conformance torture test when testing double
precision, fails in bizarre ways (see above web page). This seems to
be due to further undocumented subtle timing bugs in the silicon,
which only "paranoia" is unlucky enough to tickle.
Enjoy; feedback welcome
M
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