Generic w_log.c.
authordrepper <drepper>
Wed, 14 Dec 2005 11:50:22 +0000 (11:50 +0000)
committerdrepper <drepper>
Wed, 14 Dec 2005 11:50:22 +0000 (11:50 +0000)
math/w_log.c [new file with mode: 0644]

diff --git a/math/w_log.c b/math/w_log.c
new file mode 100644 (file)
index 0000000..6f6f74f
--- /dev/null
@@ -0,0 +1,48 @@
+/* @(#)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
+}
+weak_alias (__log, log)
+#ifdef NO_LONG_DOUBLE
+strong_alias (__log, __logl)
+weak_alias (__log, logl)
+#endif