1 files changed, 52 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/ieee754/flt-32/s_scalbnf.c b/REORG.TODO/sysdeps/ieee754/flt-32/s_scalbnf.c
new file mode 100644
index 0000000000..f36ae241b2
--- /dev/null
+++ b/REORG.TODO/sysdeps/ieee754/flt-32/s_scalbnf.c
@@ -0,0 +1,52 @@
+/* s_scalbnf.c -- float version of s_scalbn.c.
+ * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@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.
+ * ====================================================
+ */
+
+#include <math.h>
+#include <math_private.h>
+
+static const float
+two25   =  3.355443200e+07,	/* 0x4c000000 */
+twom25  =  2.9802322388e-08,	/* 0x33000000 */
+huge   = 1.0e+30,
+tiny   = 1.0e-30;
+
+float
+__scalbnf (float x, int n)
+{
+	int32_t k,ix;
+	GET_FLOAT_WORD(ix,x);
+	k = (ix&0x7f800000)>>23;		/* extract exponent */
+	if (__builtin_expect(k==0, 0)) {	/* 0 or subnormal x */
+	    if ((ix&0x7fffffff)==0) return x; /* +-0 */
+	    x *= two25;
+	    GET_FLOAT_WORD(ix,x);
+	    k = ((ix&0x7f800000)>>23) - 25;
+	    }
+	if (__builtin_expect(k==0xff, 0)) return x+x;	/* NaN or Inf */
+	if (__builtin_expect(n< -50000, 0))
+	  return tiny*__copysignf(tiny,x);	/*underflow*/
+	if (__builtin_expect(n> 50000 || k+n > 0xfe, 0))
+	  return huge*__copysignf(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_FLOAT_WORD(x,(ix&0x807fffff)|(k<<23)); return x;}
+	if (k <= -25)
+	    return tiny*__copysignf(tiny,x);	/*underflow*/
+	k += 25;				/* subnormal result */
+	SET_FLOAT_WORD(x,(ix&0x807fffff)|(k<<23));
+	return x*twom25;
+}