1 files changed, 85 insertions, 0 deletions
diff --git a/newlib/libm/machine/spu/headers/llround.h b/newlib/libm/machine/spu/headers/llround.h
new file mode 100644
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+++ b/newlib/libm/machine/spu/headers/llround.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 _LLROUND_H_
+#define _LLROUND_H_	1
+
+#include <spu_intrinsics.h>
+#include "headers/vec_literal.h"
+
+static __inline long long int _llround(double x)
+{
+  int shift;
+  vec_int4 exp;
+  vec_uint4 mant, sign, mask, borrow, addend;
+  vec_double2 in;
+
+  in = spu_promote(x, 0);
+
+  /* Determine how many bits to shift the mantissa to correctly
+   * align it into long long element 0.
+   */
+  exp = spu_and(spu_rlmask((vec_int4)in, -20), 0x7FF);
+  exp = spu_add(exp, -1011);
+  shift = spu_extract(exp, 0);
+
+  mask = spu_cmpgt(exp, 0);
+  mask = (vec_uint4)spu_maskw(spu_extract(mask, 0));
+
+  /* Algn mantissa bits
+   */
+  mant = spu_sel(spu_rlmaskqwbyte((vec_uint4)in, -8), VEC_SPLAT_U32(0x00100000),
+                 VEC_LITERAL(vec_uint4, 0,0,0xFFF00000,0));
+
+  mant = spu_and(spu_slqwbytebc(spu_slqw(mant, shift), shift), mask);
+
+  /* Perform round by adding 1 if the fraction bits are
+   * greater than or equal to .5
+   */
+  addend = spu_and(spu_rlqw(mant, 1), VEC_LITERAL(vec_uint4, 0,1,0,0));
+  mant = spu_addx(mant, addend, spu_rlqwbyte(spu_genc(mant, addend), 4));
+
+  /* Compute the two's complement of the mantissa if the
+   * input is negative.
+   */
+  sign = spu_maskw(spu_extract(spu_rlmaska((vec_int4)in, -31), 0));
+
+  mant = spu_xor(mant, sign);
+  borrow = spu_genb(mant, sign);
+  borrow = spu_shuffle(borrow, borrow,
+                       VEC_LITERAL(vec_uchar16, 4,5,6,7, 192,192,192,192,
+                                   4,5,6,7, 192,192,192,192));
+  mant = spu_subx(mant, sign, borrow);
+
+  return (spu_extract((vec_llong2)(mant), 0));
+}
+#endif /* _LLROUND_H_ */