From d2544ca8ebdd8bbd944e47b2dd3a0c2062ac1c80 Mon Sep 17 00:00:00 2001
From: simonb <simonb@NetBSD.org>
Date: Sun, 28 Oct 2001 10:41:56 +0000
Subject: [PATCH] Add a not-a-number test, based on Ben Harris's infinity test.
 Disabled on vax.

---
 regress/lib/libc/ieeefp/Makefile     |  6 +++++-
 regress/lib/libc/ieeefp/nan/Makefile |  9 +++++++++
 regress/lib/libc/ieeefp/nan/nan.c    | 28 ++++++++++++++++++++++++++++
 3 files changed, 42 insertions(+), 1 deletion(-)
 create mode 100644 regress/lib/libc/ieeefp/nan/Makefile
 create mode 100644 regress/lib/libc/ieeefp/nan/nan.c

diff --git a/regress/lib/libc/ieeefp/Makefile b/regress/lib/libc/ieeefp/Makefile
index 7c1063c58c35..35d1bc1df022 100644
--- a/regress/lib/libc/ieeefp/Makefile
+++ b/regress/lib/libc/ieeefp/Makefile
@@ -1,7 +1,11 @@
-#	$NetBSD: Makefile,v 1.9 2001/10/27 23:36:32 bjh21 Exp $
+#	$NetBSD: Makefile,v 1.10 2001/10/28 10:41:56 simonb Exp $
 
 # Don't hook up testfloat just yet. (ross, 2001.3.12)
 
 SUBDIR+= except infinity round
+.if ${MACHINE} != "vax"
+SUBDIR+= nan
+.endif
+
 
 .include <bsd.subdir.mk>
diff --git a/regress/lib/libc/ieeefp/nan/Makefile b/regress/lib/libc/ieeefp/nan/Makefile
new file mode 100644
index 000000000000..9381fcaa6406
--- /dev/null
+++ b/regress/lib/libc/ieeefp/nan/Makefile
@@ -0,0 +1,9 @@
+#	$NetBSD: Makefile,v 1.1 2001/10/28 10:41:56 simonb Exp $
+
+PROG=	nan
+MKMAN=	no
+
+regress: ${PROG}
+	./${PROG}
+
+.include <bsd.prog.mk>
diff --git a/regress/lib/libc/ieeefp/nan/nan.c b/regress/lib/libc/ieeefp/nan/nan.c
new file mode 100644
index 000000000000..a38db3dfc54a
--- /dev/null
+++ b/regress/lib/libc/ieeefp/nan/nan.c
@@ -0,0 +1,28 @@
+/*	$NetBSD: nan.c,v 1.1 2001/10/28 10:41:56 simonb Exp $	*/
+
+/*
+ * This file is in the Public Domain.
+ *
+ * Blatently copied from the infinity test by Ben Harris.
+ *
+ * Simon Burge, 2001
+ */
+
+/*
+ * Check that NAN (alias __nanf) really is not-a-number.
+ * Alternatively, check that isnan() minimally works.
+ */
+
+#include <err.h>
+#include <math.h>
+#include <stdlib.h>
+
+int
+main(int argc, char **argv)
+{
+
+	/* NAN is meant to be an infinity. */
+	if (!isnan(NAN))
+		errx(1, "NAN is a number");
+	return 0;
+}