added updated version of simdmathlibrary-1.0.1

2007-07-27 18:53:58 +00:00
parent fddd6c5721
commit f360dd27d6
377 changed files with 9928 additions and 6136 deletions
--- a/Extras/simdmathlibrary/spu/simdmath/lldivu2.h
+++ b/Extras/simdmathlibrary/spu/simdmath/lldivu2.h
@@ -0,0 +1,104 @@
+/* lldivu2 - 
+   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_LLDIVU2_H___
+#define ___SIMD_MATH_LLDIVU2_H___
+
+#include <simdmath.h>
+#include <spu_intrinsics.h>
+
+#include <simdmath/_lldiv.h>
+
+// lldivu2 - for each of two unsigned long long interger slots, compute quotient and remainder of 
+// numer/denom and store in lldivu2_t struct.  Divide by zero produces quotient = 0, remainder = numerator.
+
+static inline lldivu2_t
+_lldivu2 (vector unsigned long long numer, vector unsigned long long denom)
+{
+  lldivu2_t res;
+  vec_uint4 denomZeros, numerZeros;
+  vec_int4 shift;
+  vec_ullong2 denomShifted, oneShifted, denomLeft, oneLeft;
+  vec_ullong2 quot, newQuot;
+  vec_ullong2 newNum, skip, cont;
+  int       anyCont;
+
+  // Get difference of leading zeros.
+
+  denomZeros = (vec_uint4)__ll_spu_cntlz( denom );
+  numerZeros = (vec_uint4)__ll_spu_cntlz( numer );
+
+  shift = (vec_int4)spu_sub( denomZeros, numerZeros );
+
+  // Shift denom to align leading one with numerator's
+
+  denomShifted = __ll_spu_sl( denom, (vec_ullong2)shift );
+  oneShifted = __ll_spu_sl( spu_splats(1ull), (vec_ullong2)shift );
+  oneShifted = spu_sel( oneShifted, spu_splats(0ull), __ll_spu_cmpeq_zero( denom ) );
+
+  // Shift left all leading zeros.
+
+  denomLeft = __ll_spu_sl( denom, (vec_ullong2)denomZeros );
+  oneLeft = __ll_spu_sl( spu_splats(1ull), (vec_ullong2)denomZeros );
+
+  quot = spu_splats(0ull);
+
+  do
+    {
+      cont = __ll_spu_cmpgt( oneShifted, spu_splats(0ull) );
+      anyCont = spu_extract( spu_gather((vec_uint4)cont ), 0 );
+
+      newQuot = spu_or( quot, oneShifted );
+
+      // Subtract shifted denominator from remaining numerator 
+      // when denominator is not greater.
+
+      skip = __ll_spu_cmpgt( denomShifted, numer );
+      newNum = __ll_spu_sub( numer, denomShifted );
+
+      // If denominator is greater, next shift is one more, otherwise
+      // next shift is number of leading zeros of remaining numerator.
+
+      numerZeros = (vec_uint4)spu_sel( __ll_spu_cntlz( newNum ), (vec_ullong2)numerZeros, skip );
+      shift = (vec_int4)spu_sub( (vec_uint4)skip, numerZeros );
+
+      oneShifted = __ll_spu_rlmask( oneLeft, (vec_ullong2)shift );
+      denomShifted = __ll_spu_rlmask( denomLeft, (vec_ullong2)shift );
+
+      quot = spu_sel( newQuot, quot, skip );
+      numer = spu_sel( newNum, numer, spu_orc(skip,cont) );
+    } 
+  while ( anyCont );
+
+  res.quot = quot;
+  res.rem = numer;
+  return res;
+}
+
+#endif