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Path: utzoo!utcsri!greg
From: greg@utcsri.UUCP (Gregory Smith)
Newsgroups: net.lang.c
Subject: Re: C compiler test
Message-ID: <3153@utcsri.UUCP>
Date: Wed, 23-Jul-86 14:46:39 EDT
Article-I.D.: utcsri.3153
Posted: Wed Jul 23 14:46:39 1986
Date-Received: Wed, 23-Jul-86 15:23:27 EDT
References: <2477@brl-smoke.ARPA>
Reply-To: greg@utcsri.UUCP (Gregory Smith)
Organization: CSRI, University of Toronto
Lines: 29
Summary: 

In article <2477@brl-smoke.ARPA> ucsch.pravda@ucb-vax.ARPA writes:
>
>On our VAX 11/750 running 4.2bsd I got the incorrect 3 and 4
>both normal and optimized.
>
>Maybe you see something in this (I'm no assembler wiz)?
:
( Comments mine:)
>L16:	.double	0d2.5e+00
>	.text
>	cvtld	-4(fp),r0 ;	r0 = (double)i
>	divd2	L16,r0	  ;	r0 = r0/2.5  ( double divide )
>	cvtdl	r0,r0	  ;	r0 = (int)r0
>	movl	r0,-4(fp) ;	i = r0
:
>L19:	.double	0d2.5e+00
>	.text
>	cvtdl	L19,r0	  ;	r0 = (int)2.5	( i.e. r=2 )
>	divl2	r0,-4(fp) ;	i=i/r0		( integer divide )

So i /= 2.5 is incorrectly treated as i /= (int)2.5.
( This here VAX running 4.2BSD produces essentially the same code
for both and says 3,3).

-- 
"You'll need more than a Tylenol if you don't tell me where my father is!"
						- The Ice Pirates
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Greg Smith     University of Toronto      UUCP: ..utzoo!utcsri!greg