Add an implementation of copysignl(), a long double version of copysign().

Approved by:	das (mentor)

2 files changed, 44 insertions, 0 deletions

diff --git a/lib/msun/src/math.h b/lib/msun/src/math.h
index 1ca12d1..116335b 100644
--- a/lib/msun/src/math.h
+++ b/lib/msun/src/math.h
@@ -353,7 +353,9 @@ long double	atanhl(long double);
 long double	atanl(long double);
 long double	cbrtl(long double);
 long double	ceill(long double);
+#endif
 long double	copysignl(long double, long double);
+#if 0
 long double	coshl(long double);
 long double	cosl(long double);
 long double	erfcl(long double);
diff --git a/lib/msun/src/s_copysignl.c b/lib/msun/src/s_copysignl.c
new file mode 100644
index 0000000..8d39f84
--- /dev/null
+++ b/lib/msun/src/s_copysignl.c
@@ -0,0 +1,42 @@
+/*-
+ * Copyright (c) 2004 Stefan Farfeleder
+ * 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, 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 AUTHOR AND CONTRIBUTORS ``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 AUTHOR OR CONTRIBUTORS 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.
+ *
+ * $FreeBSD$
+ */
+
+#include <math.h>
+
+#include "fpmath.h"
+
+long double
+copysignl(long double x, long double y)
+{
+	union IEEEl2bits ux, uy;
+
+	ux.e = x;
+	uy.e = y;
+	ux.bits.sign = uy.bits.sign;
+	return (ux.e);
+}