added updated version of simdmathlibrary-1.0.1

Extras/simdmathlibrary/spu/simdmath/llroundd2.h

@@ -0,0 +1,97 @@
+/* llroundd2 - rounds two doubles in to two nearest 64bit integer.
+               0.5 will be rounded to far from 0
+   Copyright (C) 2006, 2007 Sony Computer Entertainment Inc.
+   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 name of the Sony Computer Entertainment Inc nor the names
+      of its 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 ___SIMD_MATH_LLROUNDD2_H___
+#define ___SIMD_MATH_LLROUNDD2_H___
+
+#include <simdmath.h>
+#include <spu_intrinsics.h>
+
+// 
+// Handles no exception
+// over flow will return unspecified data
+
+static inline vector signed long long
+_llroundd2 (vector double in)
+{
+  int shift0, shift1;
+  vec_uchar16 splat_msb = { 0,0,0,0,0,0,0,0, 8,8,8,8,8,8,8,8};
+  vec_int4 exp;
+  vec_uint4 mant, mant0, mant1, sign, mask, borrow, addend;
+  vec_uint4 implied_one = { 0, 0, 0x00100000, 0};
+  vec_uint4 exp_mask = { -1, -1,0xFFF00000, 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);
+  shift0 = spu_extract(exp, 0);
+  shift1 = spu_extract(exp, 2);
+
+  mask = spu_cmpgt(exp, 0);
+  mask = spu_shuffle(mask, mask, splat_msb);
+
+  /* Algn mantissa bits
+   */
+  mant0 = spu_sel(spu_rlmaskqwbyte((vec_uint4)in, -8), implied_one, exp_mask);
+  mant1 = spu_sel((vec_uint4)in, implied_one, exp_mask);
+
+  mant0 = spu_slqwbytebc(spu_slqw(mant0, shift0), shift0);
+  mant1 = spu_slqwbytebc(spu_slqw(mant1, shift1), shift1);
+
+  mant = spu_shuffle(mant0, mant1, ((vec_uchar16){0,1,2,3,4,5,6,7, 16,17,18,19,20,21,22,23}));
+  mant = spu_and(mant, mask);
+
+  /* Perform round by adding 1 if the fraction bits are 
+   * greater than or equal to .5
+   */
+  addend = spu_shuffle(mant0, mant1, ((vec_uchar16){0x80,0x80,0x80,0x80,0x80,0x80,0x80,8, 0x80,0x80,0x80,0x80,0x80,0x80,0x80,24}));
+  addend = spu_rlmask(addend, -7);
+  //  addend = spu_and(spu_rlqw(mant, 1), ((vec_uint4){ 0,1,0,1}));
+  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 = (vec_uint4)spu_rlmaska((vec_int4)in, -31);
+  sign = spu_shuffle(sign, sign, splat_msb);
+
+  mant = spu_xor(mant, sign);
+  borrow = spu_genb(mant, sign);
+  borrow = spu_shuffle(borrow, borrow, ((vec_uchar16){
+	4,5,6,7, 192,192,192,192,
+	  12,13,14,15, 192,192,192,192}));
+  mant = spu_subx(mant, sign, borrow);
+
+  return ((vec_llong2)(mant));
+}
+
+#endif