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authorEric Andersen <andersen@codepoet.org>2001-11-22 14:04:29 (GMT)
committerEric Andersen <andersen@codepoet.org>2001-11-22 14:04:29 (GMT)
commit7ce331c01ce6eb7b3f5c715a38a24359da9c6ee2 (patch)
tree3a7e8476e868ae15f4da1b7ce26b2db6f434468c /libm/s_ldexp.c
parentc117dd5fb183afb1a4790a6f6110d88704be6bf8 (diff)
Totally rework the math library, this time based on the MacOs X
math library (which is itself based on the math lib from FreeBSD). -Erik
Diffstat (limited to 'libm/s_ldexp.c')
-rw-r--r--libm/s_ldexp.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/libm/s_ldexp.c b/libm/s_ldexp.c
new file mode 100644
index 0000000..5e7313e
--- /dev/null
+++ b/libm/s_ldexp.c
@@ -0,0 +1,34 @@
+#if !defined(__ppc__)
+/* @(#)s_ldexp.c 5.1 93/09/24 */
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice
+ * is preserved.
+ * ====================================================
+ */
+
+#if defined(LIBM_SCCS) && !defined(lint)
+static char rcsid[] = "$NetBSD: s_ldexp.c,v 1.6 1995/05/10 20:47:40 jtc Exp $";
+#endif
+
+#include "math.h"
+#include "math_private.h"
+#include <errno.h>
+
+#ifdef __STDC__
+ double ldexp(double value, int exp)
+#else
+ double ldexp(value, exp)
+ double value; int exp;
+#endif
+{
+ if(!finite(value)||value==0.0) return value;
+ value = scalbn(value,exp);
+ if(!finite(value)||value==0.0) errno = ERANGE;
+ return value;
+}
+#endif /* !__ppc__ */