Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!psuvax1!psuvm!cunyvm!ndsuvm1!mtus5!zhhu
From: ZHHU@MTUS5.BITNET
Newsgroups: comp.sys.amiga.tech
Subject: Re: Is this a Lattice C 5.05 compiler bug ?
Message-ID: <90303.131300ZHHU@MTUS5.BITNET>
Date: 30 Oct 90 18:13:00 GMT
Organization: Computing Technology Services, Michigan Technological Univ.
Lines: 40

>In article <90297.145845ZHHU@MTUS5.BITNET> ZHHU@MTUS5.BITNET writes:
>>Whenever an unsigned integer multiply a float or a double, it will
>>crash my Amiga 1000, but the same source code works fine on a PC or
>>UNIX machine. This is painful, because you can be careful by type
>>casting, but when you compile a PD program, especially the big files
>>you cannot afford the time to find them. I use Lattice C compiler 5.05,
>>I wonder if this is a bug, whether 5.10 have the same problem. Can
>>any body kindly take the risk of crashing, and try the following:
>>
>>#include <stdio.h>
>>main()
>>{
>>    unsigned int i;
>>    int j;
>>    float a;
>>    i = 10;
>>    j = 10;
>>    a = j*15.0;             /* should not crash here */
>>    printf("a= %f:n",a);
>>    a = i*15.0;             /* crash here on my machine*/
>>    printf("a= %f:n",a);
>>}
>
>I own an Amiga 2000 and Lattice C5.05; the program works fine when
>compiled with
>
>   lc -f -Lm prog
>
>       --  Frank

I try to compile the program using the "-f" switch, it won't crash
the machine any more, thank you Frank. But my question now is:
    Why it crashes my A1000 when I compile using

        lc -Lm prog

    According to the Lattice C manual, the default switch is "-fm" which
    means mixed float and double type.

--Zhiquan