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

1 files changed, 43 insertions, 0 deletions

diff --git a/libm/w_log.c b/libm/w_log.c
new file mode 100644
index 000000000..507c18c69
--- /dev/null
+++ b/libm/w_log.c
@@ -0,0 +1,43 @@
+/* @(#)w_log.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: w_log.c,v 1.6 1995/05/10 20:49:33 jtc Exp $";
+#endif
+
+/*
+ * wrapper log(x)
+ */
+
+#include "math.h"
+#include "math_private.h"
+
+
+#ifdef __STDC__
+	double log(double x)		/* wrapper log */
+#else
+	double log(x)			/* wrapper log */
+	double x;
+#endif
+{
+#ifdef _IEEE_LIBM
+	return __ieee754_log(x);
+#else
+	double z;
+	z = __ieee754_log(x);
+	if(_LIB_VERSION == _IEEE_ || isnan(x) || x > 0.0) return z;
+	if(x==0.0)
+	    return __kernel_standard(x,x,16); /* log(0) */
+	else 
+	    return __kernel_standard(x,x,17); /* log(x<0) */
+#endif
+}