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From: dclemans@mntgfx.MENTOR.COM (Dave Clemans)
Newsgroups: comp.sys.atari.st
Subject: Re: MWC problem with 'long int'
Message-ID: <740@dclemans.mntgfx.MENTOR.COM>
Date: Thu, 18-Jun-87 12:52:03 EDT
Article-I.D.: dclemans.740
Posted: Thu Jun 18 12:52:03 1987
Date-Received: Mon, 22-Jun-87 01:15:25 EDT
References: <8706170613.AA18106@cory.Berkeley.EDU>
Organization: Mentor Graphics, Beaverton OR
Lines: 11
Summary: mwc 2.0 bug in sign extensions


Mark Williams C version 2.0 has a bug in doing at least some types
of sign extensions of int's to longs; specifically it can generate
the 68000 instruction
    ext.w
(which sign extends an 8 bit quantity into 16 bits) instead of
the correct
    ext.l
(which sign extends a 16 bit quantity into 32 bits).

dgc