From 35345f1c09b6e08e674fb7cbad3258cd1acdd91d Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Tue, 2 Mar 2010 21:19:33 +0000
Subject: [PATCH] * win32/win32.c (signbig): defined.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@26799 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog          |  4 +++-
 win32/Makefile.sub |  1 +
 win32/win32.c      | 11 +++++++++++
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 7c1221096b..d5c978cbf2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,6 @@
-Wed Mar  3 05:48:54 2010  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+Wed Mar  3 06:19:25 2010  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* win32/win32.c (signbig): defined.
 
 	* win32/Makefile.sub, symbian/setup (config.h): pack.c requires
 	  SIZEOF_INT*_T now.
diff --git a/win32/Makefile.sub b/win32/Makefile.sub
index 8f1d779207..bbca662bff 100644
--- a/win32/Makefile.sub
+++ b/win32/Makefile.sub
@@ -552,6 +552,7 @@ $(CONFIG_H): $(MKFILES) $(srcdir)/win32/Makefile.sub $(win_srcdir)/Makefile.sub
 #define HAVE_COSH 1
 #define HAVE_SINH 1
 #define HAVE_TANH 1
+#define HAVE_SIGNBIT 1
 #define HAVE_TZNAME 1
 #define HAVE_DAYLIGHT 1
 #define SETPGRP_VOID 1
diff --git a/win32/win32.c b/win32/win32.c
index 215752210d..54f0940250 100644
--- a/win32/win32.c
+++ b/win32/win32.c
@@ -5272,3 +5272,14 @@ _ftol2_sse(double d)
     return _ftol(d);
 }
 #endif
+
+int
+signbit(double x)
+{
+#ifdef _M_IX86
+    int *ip = (int *)(&x + 1) - 1;
+    return *ip < 0;
+#else
+# error not supported
+#endif
+}