Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!husc6!endor!siegel
From: siegel@endor.harvard.edu (Rich Siegel)
Newsgroups: comp.sys.mac.programmer
Subject: Re: compiler bug, THINK 4.0.2
Keywords: MULS, FMOVE.W
Message-ID: <3193@husc6.harvard.edu>
Date: 13 Jun 90 01:43:49 GMT
References: <18473@well.sf.ca.us>
Sender: news@husc6.harvard.edu
Reply-To: siegel@endor.UUCP (Rich Siegel)
Distribution: comp
Organization: Symantec Language Products Group
Lines: 21

In article <18473@well.sf.ca.us> wdh@well.sf.ca.us (Bill Hofmann) writes:
>Ran into a little code generation bug in THINK 4.0.2, in which two shorts
>are multiplied (producing a long result) and stored into a double.  Alas,
>the compiler only moves the low word, producing data-specific wierdness.
	
	I'm fairly sure this isn't a bug, since the C semantics don't require
sign-extension to a long unless the target or one of the operands is a long.
You can force this sign-extension by placing a (long) in front of one of the
operands in your expression.

R.
~~~~~~~~~~~~~~~
 Rich Siegel
 Staff Software Developer
 Symantec Corporation, Language Products Group
 Internet: siegel@endor.harvard.edu
 UUCP: ..harvard!endor!siegel

"It's not the years, honey, it's the mileage."

~~~~~~~~~~~~~~~