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Re: PATCH: Fix sign-extension of bignums

From: Mark Mitchell <mark at codesourcery dot com>
To: Mark Mitchell <mark at codesourcery dot com>
Cc: Ian Lance Taylor <ian at wasabisystems dot com>, binutils at sources dot redhat dot com
Date: Tue, 10 Aug 2004 20:12:20 -0700
Subject: Re: PATCH: Fix sign-extension of bignums
Organization: CodeSourcery, LLC
References: <200408110227.i7B2R38i015153@sirius.codesourcery.com> <m3n0124c7y.fsf@gossamer.airs.com> <m3isbq4bw0.fsf@gossamer.airs.com> <41198DB7.7000903@codesourcery.com>

Mark Mitchell wrote:

Why can't we just unconditionally sign-extend the value in emit_expr, if X_unsigned is false?

With Alan's explanation, I know see that's exactly what we were trying to do, and I now understand exactly what you're saying.

Could we generate a bignum when the negation overflows?

--
Mark Mitchell
CodeSourcery, LLC
(916) 791-8304
mark@codesourcery.com

Follow-Ups:
- Re: PATCH: Fix sign-extension of bignums
  - From: Ian Lance Taylor

References:
- PATCH: Fix sign-extension of bignums
  - From: Mark Mitchell
- Re: PATCH: Fix sign-extension of bignums
  - From: Ian Lance Taylor
- Re: PATCH: Fix sign-extension of bignums
  - From: Ian Lance Taylor
- Re: PATCH: Fix sign-extension of bignums
  - From: Mark Mitchell

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