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Re: PATCH: IA64 floating-point types

From: Mark Mitchell <mark at codesourcery dot com>
To: Richard Henderson <rth at redhat dot com>
Cc: gcc-patches at gcc dot gnu dot org, zack at codesourcery dot com
Date: 09 Sep 2003 07:46:22 -0700
Subject: Re: PATCH: IA64 floating-point types
References: <200309090352.h893q9wM014201@sirius.codesourcery.com> <20030909073904.GF14968@redhat.com>

On Tue, 2003-09-09 at 00:39, Richard Henderson wrote:
> On Mon, Sep 08, 2003 at 08:52:09PM -0700, Mark Mitchell wrote:
> > On other IA64 machines,
> > that type should have size 12 and alignment 4, according to the psABI.
> 
> Surely not!
> 
> > ... but I'd like to understand why we're not following the psABI.
> 
> I'm absolutely certain the abi did not say that 5 years ago.

You, of all people, should know.

However:

http://www.intel.com/design/itanium/downloads/24537003.pdf

which is dated May 2001, says (in Section 3.2.1), that long double has
size 12 and alignment 4 in ILP32 mode.

I'm not sure if any operating systems have implemented that layout.

-- 
Mark Mitchell
CodeSourcery, LLC
mark@codesourcery.com

References:
- PATCH: IA64 floating-point types
  - From: Mark Mitchell
- Re: PATCH: IA64 floating-point types
  - From: Richard Henderson

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