Added SCE SIMD math library in Extras/simdmathlibrary

The upcoming vectormath that will used to speed up the SPU version of Extras/BulletMultiThreaded depends on this.
2007-07-23 04:58:24 +00:00
parent 685138d033
commit 7529cdb3f6
287 changed files with 32064 additions and 0 deletions
--- a/Extras/simdmathlibrary/ppu/divi4.c
+++ b/Extras/simdmathlibrary/ppu/divi4.c
@@ -0,0 +1,103 @@
+/* divi4 - 
+   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.
+ */
+
+#include <simdmath.h>
+#include <altivec.h>
+
+#include "common-types.h"
+
+
+
+// divi4 - for each of four integer slots, compute quotient and remainder of numer/denom
+// and store in divi4_t struct.  Divide by zero produces quotient = 0, remainder = numerator.
+
+divi4_t
+divi4 (vec_int4 numer, vec_int4 denom )
+{
+   vec_int4 minusone = vec_splatsi4(-1);
+   vec_uint4 zero = vec_splatsu4(0);
+   vec_uint4 one = vec_splatsu4(1);
+   vec_uint4 k158 = vec_splatsu4(158);
+   vec_uint4 k23 = vec_splatsu4(23);
+   
+   divi4_t res;
+   vec_uint4 numerPos, denomPos, quotNeg;
+   vec_uint4 numerAbs, denomAbs;
+   vec_uint4 denomZeros, numerZeros, shift, denomShifted, oneShifted;
+   vec_uint4 quot, newQuot, skip, newNum, cont;
+   int       anyCont;
+       
+   // determine whether result needs sign change
+ 
+   numerPos = (vec_uint4)vec_cmpgt( numer, minusone );
+   denomPos = (vec_uint4)vec_cmpgt( denom, minusone );
+   quotNeg = vec_xor( numerPos, denomPos );
+   
+   // use absolute values of numerator, denominator
+ 
+   numerAbs = (vec_uint4)vec_sel( vec_sub( (vec_int4)zero, numer ), numer, numerPos );
+   denomAbs = (vec_uint4)vec_sel( vec_sub( (vec_int4)zero, denom ), denom, denomPos );
+ 
+   // get difference of leading zeros to align denom with numer
+
+   denomZeros = vec_sub( k158, vec_sr( (vec_uint4)vec_ctf( denomAbs, 0 ), k23 ) );
+   numerZeros = vec_sub( k158, vec_sr( (vec_uint4)vec_ctf( numerAbs, 0 ), k23 ) );
+      
+   shift = vec_sub( denomZeros, numerZeros );
+   denomShifted = vec_sl( denomAbs, shift );
+   oneShifted = vec_sl( one, shift );
+   oneShifted = vec_sel( oneShifted, zero, vec_or( vec_cmpeq( denomAbs, zero ), 
+                                                   vec_cmpgt( denomAbs, numerAbs ) ) );
+   
+   // long division
+
+   quot = zero;
+   
+   do
+   {
+      cont = (vec_uint4)vec_cmpgt( oneShifted, zero );
+      anyCont = vec_any_gt( oneShifted, zero );
+      skip = (vec_uint4)vec_cmpgt( denomShifted, numerAbs );
+      
+      newQuot = vec_or( quot, oneShifted );
+      newNum = vec_sub( numerAbs, denomShifted );
+      
+      oneShifted = vec_sr( oneShifted, one );
+      denomShifted = vec_sr( denomShifted, one );
+      
+      quot = vec_sel( newQuot, quot, skip );
+      numerAbs = vec_sel( numerAbs, newNum, vec_andc( cont, skip ) );
+   }
+   while ( anyCont );
+
+   res.quot = (vec_int4)vec_sel( quot, vec_sub( zero, quot ), quotNeg );
+   res.rem = (vec_int4)vec_sel( (vec_uint4)vec_sub( (vec_int4)zero, (vec_int4)numerAbs ), numerAbs, numerPos );
+   return res;
+}
+