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diff --git a/newlib/libm/machine/spu/headers/scalbn.h b/newlib/libm/machine/spu/headers/scalbn.h
new file mode 100644
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+++ b/newlib/libm/machine/spu/headers/scalbn.h
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+/*
+  (C) Copyright 2001,2006,
+  International Business Machines Corporation,
+  Sony Computer Entertainment, Incorporated,
+  Toshiba Corporation,
+
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice,
+  this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+  notice, this list of conditions and the following disclaimer in the
+  documentation and/or other materials provided with the distribution.
+    * Neither the names of the copyright holders nor the names of their
+  contributors may be used to endorse or promote products derived from this
+  software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+  IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+  TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+  PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
+  OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+#ifndef _SCALBN_H_
+#define _SCALBN_H_	1
+
+#include <spu_intrinsics.h>
+#include "headers/vec_literal.h"
+
+/* scalbn computes x * 2^exp. This function variant computes the result
+ * and handles overflow, underflow, and denorms by breaking the problem
+ * into:
+ *      exp = MAX(exp, -2044)
+ *      exp = MIN(exp,  2046)
+ *      e1 = exp / 2
+ *      e2 = exp - e1;
+ *      x * 2^e1 * 2^e2
+ */
+static __inline double _scalbn(double x, int exp)
+{
+  vec_int4 e, e1, e2;
+  vec_int4 min = VEC_SPLAT_S32(-2044);
+  vec_int4 max = VEC_SPLAT_S32(2046);
+  vec_uint4 cmp_min, cmp_max;
+  vec_uint4 shift = VEC_LITERAL(vec_uint4, 20, 32, 20, 32);
+  vec_double2 f1, f2;
+  vec_double2 in, out;
+
+  in = spu_promote(x, 0);
+  e = spu_promote(exp, 0);
+
+  /* Clamp the specified exponent to the range -2044 to 2046.
+   */
+  cmp_min = spu_cmpgt(e, min);
+  cmp_max = spu_cmpgt(e, max);
+  e = spu_sel(min, e, cmp_min);
+  e = spu_sel(e, max, cmp_max);
+
+  /* Generate the factors f1 = 2^e1 and f2 = 2^e2
+   */
+  e1 = spu_rlmaska(e, -1);
+  e2 = spu_sub(e, e1);
+
+  f1 = (vec_double2)spu_sl(spu_add(e1, 1023), shift);
+  f2 = (vec_double2)spu_sl(spu_add(e2, 1023), shift);
+
+  /* Compute the product x * 2^e1 * 2^e2
+   */
+  out = spu_mul(spu_mul(in, f1), f2);
+
+  return (spu_extract(out, 0));
+}
+#endif /* _SCALBN_H_ */