[src/trunk]: src/lib/libm/src let log(<0) return NaN rather than -inf in POSI...

[drochner <drochner%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/f198ba020c69
branches:  trunk
changeset: 764107:f198ba020c69
user:      drochner <drochner%NetBSD.org@localhost>
date:      Mon Apr 11 15:17:33 2011 +0000

description:
let log(<0) return NaN rather than -inf in POSIX/XOPEN modes, as
requested in PR lib/41931 by Havard Eidnes (the PR refers to POSIX,
the OSF/1 manpage suggests that XOPEN should behave that way too)
being here, do the same to log10 and log2

diffstat:

 lib/libm/src/k_standard.c |  8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diffs (39 lines):

diff -r 64bcf5be9820 -r f198ba020c69 lib/libm/src/k_standard.c
--- a/lib/libm/src/k_standard.c Mon Apr 11 15:10:15 2011 +0000
+++ b/lib/libm/src/k_standard.c Mon Apr 11 15:17:33 2011 +0000
@@ -12,7 +12,7 @@
 
 #include <sys/cdefs.h>
 #if defined(LIBM_SCCS) && !defined(lint)
-__RCSID("$NetBSD: k_standard.c,v 1.16 2010/09/01 10:44:28 drochner Exp $");
+__RCSID("$NetBSD: k_standard.c,v 1.17 2011/04/11 15:17:33 drochner Exp $");
 #endif
 
 #include "math.h"
@@ -370,7 +370,7 @@
                if (_LIB_VERSION == _SVID_)
                  exc.retval = -HUGE;
                else
-                 exc.retval = -HUGE_VAL;
+                 exc.retval = zero/zero;
                if (_LIB_VERSION == _POSIX_)
                  errno = EDOM;
                else if (!matherr(&exc)) {
@@ -406,7 +406,7 @@
                if (_LIB_VERSION == _SVID_)
                  exc.retval = -HUGE;
                else
-                 exc.retval = -HUGE_VAL;
+                 exc.retval = zero/zero;
                if (_LIB_VERSION == _POSIX_)
                  errno = EDOM;
                else if (!matherr(&exc)) {
@@ -800,7 +800,7 @@
                if (_LIB_VERSION == _SVID_)
                  exc.retval = -HUGE;
                else
-                 exc.retval = -HUGE_VAL;
+                 exc.retval = zero/zero;
                if (_LIB_VERSION == _POSIX_)
                  errno = EDOM;
                else if (!matherr(&exc)) {