This is the mail archive of the gcc-patches@gcc.gnu.org mailing list for the GCC project.

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]
Other format:	[Raw text]

Re: [PATCH, rtl-optimization]: Fix PR37997: ICE shifting byte to the right with constant > 7FFFFFFF

From: "Joseph S. Myers" <joseph at codesourcery dot com>
To: Eric Botcazou <ebotcazou at adacore dot com>
Cc: Uros Bizjak <ubizjak at gmail dot com>, gcc-patches at gcc dot gnu dot org
Date: Tue, 8 Sep 2009 20:18:10 +0000 (UTC)
Subject: Re: [PATCH, rtl-optimization]: Fix PR37997: ICE shifting byte to the right with constant > 7FFFFFFF
References: <4AA6785A.80805@gmail.com> <200909082005.55470.ebotcazou@adacore.com> <4AA69F6E.5040109@gmail.com> <200909082205.01546.ebotcazou@adacore.com>

On Tue, 8 Sep 2009, Eric Botcazou wrote:

>   v1 >>= 0x7fffffff;
>   v1 >>= 0x80000000;

> Joseph, do you have any insight?

0x7fffffff is signed, 0x80000000 unsigned; other than that, no.

-- 
Joseph S. Myers
joseph@codesourcery.com

Follow-Ups:
- Re: [PATCH, rtl-optimization]: Fix PR37997: ICE shifting byte to the right with constant > 7FFFFFFF
  - From: Eric Botcazou

References:
- [PATCH, rtl-optimization]: Fix PR37997: ICE shifting byte to the right with constant > 7FFFFFFF
  - From: Uros Bizjak
- Re: [PATCH, rtl-optimization]: Fix PR37997: ICE shifting byte to the right with constant > 7FFFFFFF
  - From: Eric Botcazou
- Re: [PATCH, rtl-optimization]: Fix PR37997: ICE shifting byte to the right with constant > 7FFFFFFF
  - From: Uros Bizjak
- Re: [PATCH, rtl-optimization]: Fix PR37997: ICE shifting byte to the right with constant > 7FFFFFFF
  - From: Eric Botcazou

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]