2.5-18.1

math/w_powl.c

@@ -0,0 +1,68 @@
+/* w_powl.c -- long double version of w_pow.c.
+ * Conversion to long double by Ulrich Drepper,
+ * Cygnus Support, drepper@cygnus.com.
+ */
+
+/*
+ * ====================================================
+ * 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.
+ * ====================================================
+ */
+
+/*
+ * wrapper powl(x,y) return x**y
+ */
+
+#include <math.h>
+#include "math_private.h"
+
+
+#ifdef __STDC__
+	long double __powl(long double x, long double y)/* wrapper powl */
+#else
+	long double __powl(x,y)			/* wrapper powl */
+	long double x,y;
+#endif
+{
+#ifdef _IEEE_LIBM
+	return  __ieee754_powl(x,y);
+#else
+	long double z;
+	z=__ieee754_powl(x,y);
+	if(_LIB_VERSION == _IEEE_|| __isnanl(y)) return z;
+	if(__isnanl(x)) {
+	    if(y==0.0)
+	        return __kernel_standard(x,y,242); /* pow(NaN,0.0) */
+	    else
+		return z;
+	}
+	if(x==0.0) {
+	    if(y==0.0)
+	        return __kernel_standard(x,y,220); /* pow(0.0,0.0) */
+	    if(__finitel(y)&&y<0.0) {
+	      if (signbit (x) && signbit (z))
+	        return __kernel_standard(x,y,223); /* pow(-0.0,negative) */
+	      else
+	        return __kernel_standard(x,y,243); /* pow(+0.0,negative) */
+	    }
+	    return z;
+	}
+	if(!__finitel(z)) {
+	    if(__finitel(x)&&__finitel(y)) {
+	        if(__isnanl(z))
+	            return __kernel_standard(x,y,224); /* pow neg**non-int */
+	        else
+	            return __kernel_standard(x,y,221); /* pow overflow */
+	    }
+	}
+	if(z==0.0&&__finitel(x)&&__finitel(y))
+	    return __kernel_standard(x,y,222); /* pow underflow */
+	return z;
+#endif
+}
+weak_alias (__powl, powl)