From: Andrew Haley [mailto:firstname.lastname@example.org]
Sent: Friday, October 24, 2008 6:01 AM
To: Jakub Jelinek
Cc: Uros Bizjak; GCC Patches; Lu, Hongjiu
Subject: Re: [PATCH, middle end]: Fix PR 37908, thinko with atomic NAND
Jakub Jelinek wrote:
On Fri, Oct 24, 2008 at 01:29:55PM +0100, Andrew Haley wrote:
I don't think it's that exactly, but that what the builtins do is
wrong, or at best very misleading. NAND is a well-defined term of
the art; it isn't defined by the gcc documentation.
The name of the builtin may be misleading, but changing semantics of a
builtin after it has been in use for 9 years is even worse. The origin
of the builtin is in ia64intrin.h and therefore icc, I guess, so
it matters what icc is implementing.
Indeed. It's a wonder no-one commented at the time. At least, I can't
remember anyone doing so.
FAOD, I'm certainly not suggesting that we should change anything except
perhaps to add a line or two to the documentation.