2.5-18.1

1 files changed, 75 insertions, 0 deletions

diff --git a/math/e_scalbl.c b/math/e_scalbl.c
new file mode 100644
index 0000000000..1f5677d9f4
--- /dev/null
+++ b/math/e_scalbl.c
@@ -0,0 +1,75 @@
+/* e_scalbl.c -- long double version of s_scalb.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.
+ * ====================================================
+ */
+
+#if defined(LIBM_SCCS) && !defined(lint)
+static char rcsid[] = "$NetBSD: $";
+#endif
+
+/*
+ * __ieee754_scalbl(x, fn) is provide for
+ * passing various standard test suite. One
+ * should use scalbnl() instead.
+ */
+
+#include <fenv.h>
+#include <math.h>
+#include "math_private.h"
+
+#ifdef _SCALB_INT
+#ifdef __STDC__
+	long double __ieee754_scalbl(long double x, int fn)
+#else
+	long double __ieee754_scalbl(x,fn)
+	long double x; int fn;
+#endif
+#else
+#ifdef __STDC__
+	long double __ieee754_scalbl(long double x, long double fn)
+#else
+	long double __ieee754_scalbl(x,fn)
+	long double x, fn;
+#endif
+#endif
+{
+#ifdef _SCALB_INT
+	return __scalbnl(x,fn);
+#else
+	if (__isnanl(x)||__isnanl(fn)) return x*fn;
+	if (!__finitel(fn)) {
+	    if(fn>0.0) return x*fn;
+	    else if (x == 0)
+	      return x;
+	    else if (!__finitel (x))
+	      {
+# ifdef FE_INVALID
+		feraiseexcept (FE_INVALID);
+# endif
+		return __nanl ("");
+	      }
+	    else       return x/(-fn);
+	}
+	if (__rintl(fn)!=fn)
+	  {
+# ifdef FE_INVALID
+	    feraiseexcept (FE_INVALID);
+# endif
+	    return __nanl ("");
+	  }
+	if ( fn > 65000.0) return __scalbnl(x, 65000);
+	if (-fn > 65000.0) return __scalbnl(x,-65000);
+	return __scalbnl(x,(int)fn);
+#endif
+}