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Date: Wed, 21 Nov 2001 13:49:00 -0000
Subject: Re: front end changes for altivec
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Cc: Alexandre Oliva <aoliva@redhat.com>, Aldy Hernandez <aldyh@redhat.com>,
        Stan Shebs <shebs@apple.com>, "Joseph S. Myers" <jsm28@cam.ac.uk>,
        gcc@gcc.gnu.org
To: Richard Henderson <rth@redhat.com>
From: Daniel Berlin <dan@cgsoftware.com>
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On Thursday, November 29, 2001, at 02:16  AM, Richard Henderson wrote:

> On Thu, Nov 29, 2001 at 12:55:16AM -0500, Daniel Berlin wrote:
>> that addition of vectors (IE c=a + b where c, a, b are vectors)
>> transforms into
>> (set (reg:V4SF <reg for c>) (plus:V4SF (reg:V4SF <reg for a>) (reg:V4SF
>> <reg for b>))).
>
> Yes, that's lovely.  Now what about, say, saturating adds?
>
>
> r~
Anything that doesn't map easily onto rtl requires builtins.
--Dan

From mboxrd@z Thu Jan  1 00:00:00 1970
From: Daniel Berlin <dan@cgsoftware.com>
To: Richard Henderson <rth@redhat.com>
Cc: Alexandre Oliva <aoliva@redhat.com>, Aldy Hernandez <aldyh@redhat.com>, Stan Shebs <shebs@apple.com>, "Joseph S. Myers" <jsm28@cam.ac.uk>, gcc@gcc.gnu.org
Subject: Re: front end changes for altivec
Date: Thu, 29 Nov 2001 04:45:00 -0000
Message-ID: <E29B1999-E4C6-11D5-9125-000393575BCC@cgsoftware.com>
References: <20011128231612.A31134@redhat.com>
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On Thursday, November 29, 2001, at 02:16  AM, Richard Henderson wrote:

> On Thu, Nov 29, 2001 at 12:55:16AM -0500, Daniel Berlin wrote:
>> that addition of vectors (IE c=a + b where c, a, b are vectors)
>> transforms into
>> (set (reg:V4SF <reg for c>) (plus:V4SF (reg:V4SF <reg for a>) (reg:V4SF
>> <reg for b>))).
>
> Yes, that's lovely.  Now what about, say, saturating adds?
>
>
> r~
Anything that doesn't map easily onto rtl requires builtins.
--Dan