1 files changed, 60 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/ieee754/ldbl-96/s_scalblnl.c b/REORG.TODO/sysdeps/ieee754/ldbl-96/s_scalblnl.c
new file mode 100644
index 0000000000..457e999c6c
--- /dev/null
+++ b/REORG.TODO/sysdeps/ieee754/ldbl-96/s_scalblnl.c
@@ -0,0 +1,60 @@
+/* s_scalbnl.c -- long double version of s_scalbn.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.
+ * ====================================================
+ */
+
+/*
+ * scalbnl (long double x, int n)
+ * scalbnl(x,n) returns x* 2**n  computed by  exponent
+ * manipulation rather than by actually performing an
+ * exponentiation or a multiplication.
+ */
+
+#include <math.h>
+#include <math_private.h>
+
+static const long double
+two63   =  0x1p63L,
+twom64  =  0x1p-64L,
+huge   = 1.0e+4900L,
+tiny   = 1.0e-4900L;
+
+long double
+__scalblnl (long double x, long int n)
+{
+	int32_t k,es,hx,lx;
+	GET_LDOUBLE_WORDS(es,hx,lx,x);
+	k = es&0x7fff;				/* extract exponent */
+	if (__builtin_expect(k==0, 0)) {	/* 0 or subnormal x */
+	    if ((lx|(hx&0x7fffffff))==0) return x; /* +-0 */
+	    x *= two63;
+	    GET_LDOUBLE_EXP(es,x);
+	    k = (es&0x7fff) - 63;
+	    }
+	if (__builtin_expect(k==0x7fff, 0)) return x+x;	/* NaN or Inf */
+	if (__builtin_expect(n< -50000, 0))
+	  return tiny*__copysignl(tiny,x);
+	if (__builtin_expect(n> 50000 || k+n > 0x7ffe, 0))
+	  return huge*__copysignl(huge,x); /* overflow  */
+	/* Now k and n are bounded we know that k = k+n does not
+	   overflow.  */
+	k = k+n;
+	if (__builtin_expect(k > 0, 1))		/* normal result */
+	    {SET_LDOUBLE_EXP(x,(es&0x8000)|k); return x;}
+	if (k <= -64)
+	    return tiny*__copysignl(tiny,x); 	/*underflow*/
+	k += 64;				/* subnormal result */
+	SET_LDOUBLE_EXP(x,(es&0x8000)|k);
+	return x*twom64;
+}