X-Recipient:	archive-cygwin AT delorie DOT com
DomainKey-Signature:	a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:from:to:subject:date:message-id:references
	:in-reply-to:content-type:mime-version
	:content-transfer-encoding; q=dns; s=default; b=Gm5zEDv/cQB5b3h/
	tppPRwPPmPXzuCYZHaThYefjTsJf70lqSVe/cnHaJ4xFKzYtivHHT8ybyfWBm99U
	Q8x98p5GV9B+ujdxSJS9doYwxTFnsgsDH+np6A8fcOxPSpSzYB0p/24k/1weWO2s
	wq81Fs97t1ZbPGAYnSGzBKszF4M=
DKIM-Signature:	v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:from:to:subject:date:message-id:references
	:in-reply-to:content-type:mime-version
	:content-transfer-encoding; s=default; bh=6fbpw5qmvXLFzjzeq6/QRD
	ngig4=; b=u0RyXnXTZlYULW0xiycLy9vTmVeT11pBxwN+5AdoKHKVUbOlXAfhH5
	/6eTY0eaxI8RCl7YxopjA218hdrtnURx0+KquxllO1hwABmICK5Ooztv0SQMCjVc
	jwRxufTI/4GZdalHmUQ9PpkRcs+tH6V5yygxXUDXS250tv/pHsQRo=
Mailing-List:	contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id:	<cygwin.cygwin.com>
List-Subscribe:	<mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive:	<http://sourceware.org/ml/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender:	cygwin-owner AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
Delivered-To:	mailing list cygwin AT cygwin DOT com
Authentication-Results:	sourceware.org; auth=none
X-Virus-Found:	No
X-Spam-SWARE-Status:	No, score=-1.8 required=5.0 tests=AWL,BAYES_00,MIME_BASE64_BLANKS,SPF_PASS autolearn=ham version=3.3.2 spammy=dear, Tel, tel, commercial
X-HELO:	mga12.intel.com
X-Amp-Result:	SKIPPED(no attachment in message)
X-Amp-File-Uploaded:	False
X-ExtLoop1:	1
From:	"Soegtrop, Michael" <michael DOT soegtrop AT intel DOT com>
To:	"cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Subject:	RE: Floating point exception in strtod()
Date:	Mon, 9 Apr 2018 14:45:56 +0000
Message-ID:	<0F7D3B1B3C4B894D824F5B822E3E5A177861A71E@IRSMSX102.ger.corp.intel.com>
References:	<dd5e98ea-8f39-1c4b-116c-37968cb3a52d AT cornell DOT edu> <20180409094706 DOT GO18998 AT calimero DOT vinschen DOT de>
In-Reply-To:	<20180409094706.GO18998@calimero.vinschen.de>
x-ctpclassification:	CTP_NT
x-titus-metadata-40:	eyJDYXRlZ29yeUxhYmVscyI6IiIsIk1ldGFkYXRhIjp7Im5zIjoiaHR0cDpcL1wvd3d3LnRpdHVzLmNvbVwvbnNcL0ludGVsMyIsImlkIjoiY2YwZDRmNzgtNDQyYy00OGE2LTg3NTgtYzM2ZmMzYTQxMGY2IiwicHJvcHMiOlt7Im4iOiJDVFBDbGFzc2lmaWNhdGlvbiIsInZhbHMiOlt7InZhbHVlIjoiQ1RQX05UIn1dfV19LCJTdWJqZWN0TGFiZWxzIjpbXSwiVE1DVmVyc2lvbiI6IjE3LjIuNS4xOCIsIlRydXN0ZWRMYWJlbEhhc2giOiIxZ21mNEZ0aVp3Rkd0eUtyTHI0WGtKaDhQYjQwS08waXFRNFVcL1Y4UUJQVDQySHB6NFpRKzZVd3dzXC9ZTk01YngifQ==
MIME-Version:	1.0
X-IsSubscribed:	yes
X-MIME-Autoconverted:	from base64 to 8bit by delorie.com id w39EkcYG002343

Dear Corinna,

> L is of type Long == int32_t, aadj is of type double.  The value of aadj at this time is 2529648000.0 == 0x96c75d80 which appears to be perfectly valid for a 32 bit int.

2529648000 is a valid unsigned long, but not a valid signed long. The largest 32 bit long is 2^31-1 = 2147483647. 0x96c75d80 interpreted as a signed long is a negative number.

I would say if floating point instructions are used to convert 2529648000 to a signed 32 bit integer, they should produce an FE_INVALID exception.
 
Best regards,

Michael
Intel Deutschland GmbH
Registered Address: Am Campeon 10-12, 85579 Neubiberg, Germany
Tel: +49 89 99 8853-0, www.intel.de
Managing Directors: Christin Eisenschmid, Christian Lamprechter
Chairperson of the Supervisory Board: Nicole Lau
Registered Office: Munich
Commercial Register: Amtsgericht Muenchen HRB 186928

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple

- Raw text -