add C99 round(), based on ieee_src, for noieee_src. tested on VAX

ok millert@

2 files changed, 50 insertions, 2 deletions

diff --git a/lib/libm/Makefile b/lib/libm/Makefile
index 57cb541cb30..8c1bf3b57d5 100644
--- a/lib/libm/Makefile
+++ b/lib/libm/Makefile
@@ -1,5 +1,5 @@
 #  $NetBSD: Makefile,v 1.28 1995/11/20 22:06:19 jtc Exp $
-#  $OpenBSD: Makefile,v 1.41 2006/09/25 20:25:41 kettenis Exp $
+#  $OpenBSD: Makefile,v 1.42 2008/06/11 14:35:33 martynas Exp $
 #
 #  @(#)Makefile 5.1beta 93/09/24 
 # 
@@ -134,7 +134,8 @@ NOIEEE_SRCS = n_asincos.c n_acosh.c n_asinh.c n_atan.c n_atanh.c n_cosh.c \
 	n_erf.c n_exp.c n_exp__E.c n_expm1.c n_floor.c n_fmod.c n_gamma.c \
 	n_lgamma.c n_j0.c n_j1.c n_jn.c n_log.c n_log10.c n_log1p.c \
 	n_log__L.c n_pow.c n_sinh.c n_tanh.c n_atan2.c n_cabs.c n_cbrt.c \
-	n_sqrt.c n_sincos.c n_tan.c n_argred.c n_support.c n_infnan.c
+	n_sqrt.c n_sincos.c n_tan.c n_argred.c n_support.c n_infnan.c \
+	n_round.c
         
 
 # NetBSD's C library supplies these functions:
diff --git a/lib/libm/noieee_src/n_round.c b/lib/libm/noieee_src/n_round.c
new file mode 100644
index 00000000000..f45badca52e
--- /dev/null
+++ b/lib/libm/noieee_src/n_round.c
@@ -0,0 +1,47 @@
+/*	$OpenBSD: n_round.c,v 1.1 2008/06/11 14:35:33 martynas Exp $	*/
+
+/*-
+ * Copyright (c) 2003, Steven G. Kargl
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice unmodified, this list of conditions, and the following
+ *    disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "math.h"
+
+double
+round(double x)
+{
+	double t;
+
+	if (x >= 0.0) {
+		t = floor(x);
+		if (t - x <= -0.5)
+			t += 1.0;
+		return (t);
+	} else {
+		t = floor(-x);
+		if (t + x <= -0.5)
+			t += 1.0;
+		return (-t);
+	}
+}