Path: utzoo!mnetor!uunet!lll-winken!lll-tis!ames!oliveb!pyramid!hplabs!hpcea!hpccc!hpl-opus!kk
From: kk@hpl-opus.HP.COM (Konstantinos Konstantinides)
Newsgroups: comp.sys.hp
Subject: Re: C compiler / Assembler bugs on HP 9000/300
Message-ID: <63300001@hpl-opus.HP.COM>
Date: 6 Apr 88 17:47:06 GMT
References: <23519@ucbvax.BERKELEY.EDU>
Organization: HP Labs, High Speed Electronics Dept., Palo Alto, CA
Lines: 39

According to the HP-UX Software Release/Status Bulletin
for HP 9000 Series 200/300 Computers, August 1987, 
HP Part Number 97005-90010, this seems to be a known bug (page 23)

From the bulletin:

The following line doesn't compile
 x[1] = x[2] < x[3]; /* x is an array of doubles */

Temporary solution:
Add an additional assignement between the comparison and the original 
assignement.

 x[1] = (double) (i=(x[2] < x[3])); /* is is an integer */

For your program the following seems to work:

    f= (float) (a-b);
    g = (float) (a-c);
    if (f*10. <g)
    ;

The above Bulletin has instructions, forms and addresses for submitting bugs
(no e-mail address is mentioned). For the USA the addresses are
 
National Response Center
Hewlett-Packard
3300 Scott Blvd.
Santa Clara, CA 95051

or
1765 The Exchange Suite 100
Atlanta, GA 30339

See that Bulletin for addresses in Europe and Australia.

------------------------------------------------
Although I am working for HP this is not an official response,
but I hope that it helps.
K. Konstantinides kk%hpkronos@hplabs.hp.com