Don't reimplement the same thing twice. OK matthew@.

1 files changed, 1 insertions, 30 deletions

diff --git a/lib/libm/src/s_scalbn.c b/lib/libm/src/s_scalbn.c
index aa9973d43f6..da5be29c36c 100644
--- a/lib/libm/src/s_scalbn.c
+++ b/lib/libm/src/s_scalbn.c
@@ -23,39 +23,10 @@
 #include <float.h>
 #include <math.h>
 
-#include "math_private.h"
-
-static const double
-two54   =  1.80143985094819840000e+16, /* 0x43500000, 0x00000000 */
-twom54  =  5.55111512312578270212e-17, /* 0x3C900000, 0x00000000 */
-huge   = 1.0e+300,
-tiny   = 1.0e-300;
-
 double
 scalbn (double x, int n)
 {
-	int32_t k,hx,lx;
-	EXTRACT_WORDS(hx,lx,x);
-        k = (hx&0x7ff00000)>>20;		/* extract exponent */
-        if (k==0) {				/* 0 or subnormal x */
-            if ((lx|(hx&0x7fffffff))==0) return x; /* +-0 */
-	    x *= two54; 
-	    GET_HIGH_WORD(hx,x);
-	    k = ((hx&0x7ff00000)>>20) - 54; 
-            if (n< -50000) return tiny*x; 	/*underflow*/
-	    }
-        if (k==0x7ff) return x+x;		/* NaN or Inf */
-        k = k+n; 
-        if (k >  0x7fe) return huge*copysign(huge,x); /* overflow  */
-        if (k > 0) 				/* normal result */
-	    {SET_HIGH_WORD(x,(hx&0x800fffff)|(k<<20)); return x;}
-        if (k <= -54)
-            if (n > 50000) 	/* in case integer overflow in n+k */
-		return huge*copysign(huge,x);	/*overflow*/
-	    else return tiny*copysign(tiny,x); 	/*underflow*/
-        k += 54;				/* subnormal result */
-	SET_HIGH_WORD(x,(hx&0x800fffff)|(k<<20));
-        return x*twom54;
+	ldexp(x, n);
 }
 
 #if	LDBL_MANT_DIG == 53