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diff --git a/newlib/libm/machine/spu/headers/trunc.h b/newlib/libm/machine/spu/headers/trunc.h
new file mode 100644
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+++ b/newlib/libm/machine/spu/headers/trunc.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 _TRUNC_H_
+#define _TRUNC_H_	1
+
+#include <spu_intrinsics.h>
+#include "headers/vec_literal.h"
+
+/* Truncate the input downwards to the nearest integer.
+ */
+static __inline double _trunc(double x)
+{
+  vec_uchar16 splat_hi = VEC_LITERAL(vec_uchar16, 0,1,2,3,0,1,2,3, 8,9,10,11, 8,9,10,11);
+  vec_int4 exp, shift;
+  vec_uint4 sign = VEC_LITERAL(vec_uint4, 0x80000000, 0, 0x80000000, 0);
+  vec_uint4 or_mask, and_mask, mask;
+  vec_double2 in, in_hi, out;
+
+  in = spu_promote(x, 0);
+
+  /* Construct a mask to remove the fraction bits. The mask
+   * depends on the exponent of the floating point
+   * input value.
+   */
+  in_hi = spu_shuffle(in, in, splat_hi);
+  exp = spu_and(spu_rlmask((vec_int4)in_hi, -20), 0x7FF);
+
+  shift = spu_sub(VEC_LITERAL(vec_int4, 1023, 1043, 1023, 1043), exp);
+  or_mask = spu_andc(spu_cmpgt(shift, 0), sign);
+
+  and_mask = spu_rlmask(VEC_LITERAL(vec_uint4, 0xFFFFF, -1, 0xFFFFF, -1), shift);
+  mask = spu_or(spu_and(and_mask, spu_cmpgt(shift, -31)), or_mask);
+
+  /* Apply the mask and return the result.
+   */
+  out = spu_andc(in, (vec_double2)(mask));
+
+  return (spu_extract(out, 0));
+}
+#endif /* _TRUNC_H_ */