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:content-type:content-transfer-encoding
	:date:subject:to:message-id:mime-version; q=dns; s=default; b=yG
	PwCKM+D8GLAohnUKVhrTpzrp66hnRoeo8A1jaFuh5X+HsB35I78+x/qzhVoyK0rd
	os3zgKJCSt6P4VFqsOoa68WeKvg0Ztxk4xW1oVBImLJauqet2mOHbe8UPklvRNFr
	YwmHcZ/5WGnyH2kGPpLnsprI64EteP+IZioXIuSfo=
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:content-type:content-transfer-encoding
	:date:subject:to:message-id:mime-version; s=default; bh=+8NuIOou
	vSh4arihumCdUng0l2w=; b=N1fwhNNpGudGxdbiQ4DNadrE6wQVWKDQ2+97A1nk
	O8+LeTj6UeOwqvzKhjcA/5HHhb1VyDjkLY3rTYXqrw4PvMM1FzzdkEng38DKeRMw
	LlqTIrk+dvFaaWJWPGpG3/9oFzQu7ITsnk/hks/sm0Kbrp9H9Hqh0do4POhMlHIv
	C3Y=
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=-0.7 required=5.0 tests=AWL,BAYES_05,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.2
X-HELO:	smtp4-g21.free.fr
From:	Denis Excoffier <cygwin AT Denis-Excoffier DOT org>
Date:	Thu, 7 Aug 2014 19:41:04 +0200
Subject:	suggestion about math.h
To:	Cygwin Mailing List <cygwin AT cygwin DOT com>
Message-Id:	<8437F00B-0E62-4F8A-9B4C-B7425545289F@Denis-Excoffier.org>
Mime-Version:	1.0 (Mac OS X Mail 7.3 \(1878.6\))
X-MIME-Autoconverted:	from quoted-printable to 8bit by delorie.com id s77HfLgn008942

Hello,

Perhaps the values of some constants are not as accurate as they should be? See also M_LN2LO and M_LN2HI.

diff -uNr cygwin-snapshot-20140807-1-original/newlib/libc/include/math.h cygwin-snapshot-20140807-1-patched/newlib/libc/include/math.h
--- cygwin-snapshot-20140807-1-original/newlib/libc/include/math.h	2014-08-07 18:26:21.000000000 +0200
+++ cygwin-snapshot-20140807-1-patched/newlib/libc/include/math.h	2014-08-07 19:31:51.000000000 +0200
@@ -569,14 +569,14 @@
 #ifndef __STRICT_ANSI__
 
 #define M_TWOPI         (M_PI * 2.0)
-#define M_3PI_4		2.3561944901923448370E0
-#define M_SQRTPI        1.77245385090551602792981
+#define M_3PI_4		2.3561944901923449288E0
+#define M_SQRTPI        1.77245385090551602729817
 #define M_LN2LO         1.9082149292705877000E-10
 #define M_LN2HI         6.9314718036912381649E-1
-#define M_SQRT3	1.73205080756887719000
+#define M_SQRT3	1.73205080756887729353
 #define M_IVLN10        0.43429448190325182765 /* 1 / log(10) */
 #define M_LOG2_E        _M_LN2
-#define M_INVLN2        1.4426950408889633870E0  /* 1 / log(2) */
+#define M_INVLN2        1.4426950408889634074E0  /* 1 / log(2) */
 
 /* Global control over fdlibm error handling.  */
 


Regards,

Denis Excoffier.
--
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 -