public inbox for
 help / color / mirror / Atom feed
From: Richard Henderson <>
To: Ian Lance Taylor <>
Subject: Re: ppc instructions in gas
Date: Thu, 06 May 1999 20:13:00 -0000	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

On Fri, May 07, 1999 at 03:05:30AM -0000, Ian Lance Taylor wrote:
> I don't have the context of the original message.  The addis/lis
> instruction is documented to take a signed operand.  I don't know why
> it makes sense to remove PPC_OPERAND_SIGNED.

Context is that gcc doesn't emit signed, and some of the ppc linux
kernel sources don't use signed values either.  This worked for 
ppc32 due to the PPC_OPERAND_SIGNOPT hack, and only showed up when
Cort started work on ppc64. 

We iterated enough to conclude that we should in fact fix gcc, and
the kernel sources.  The one remaining question is whether to continue
to silently accept unsigned values for ppc32, or whether we should
warn for them.

Thoughts on that last?


  reply	other threads:[~1999-05-06 20:13 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <>
     [not found] ` <>
     [not found]   ` <>
1999-05-06 15:07     ` Richard Henderson
     [not found]       ` <>
1999-05-06 15:35         ` Richard Henderson
     [not found]           ` <>
1999-05-06 16:56             ` Richard Henderson
     [not found]               ` <>
1999-05-06 17:49                 ` Richard Henderson
     [not found]                   ` <>
1999-05-06 18:43                     ` Richard Henderson
1999-05-06 20:06       ` Ian Lance Taylor
1999-05-06 20:13         ` Richard Henderson [this message]
1999-05-06 20:43           ` Ian Lance Taylor

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \ \ \ \ \ \

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).