Add rayman2 source files

Rayman_X/cpa/tempgrp/MTH/Specif/MTH_fopt.c

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+/* ##C_FILE#
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+FILE :          MTH_fopt.c
+MODULE :        MTH     (Common Mathematic Library) 
+ 
+DESCRIPTION :   Optimization for PC and float
+ 
+VERSION :       MTH V5.0.13 / Alexandre LANGER [ALX] Ubi R&D / Add Comments
+ 
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+*/
+ 
+ 
+/* NOT for U64 */
+#ifndef U64 
+ 
+/* ##INCLUDE#----------------------------------------------------------------------------
+                          Includes Files
+---------------------------------------------------------------------------------------*/
+ 
+#include <math.h>
+ 
+ 
+ 
+#include "cpa_expt.h" 
+ 
+ 
+/* ##GLOBVAR#----------------------------------------------------------------------------
+                          Globale variable declaration
+---------------------------------------------------------------------------------------*/
+ 
+double  MTH_gs_dDecal; /* = 3.0F*pow(2, 51); */
+ 
+/* sqrt : */
+CPA_EXPORT unsigned long MTH_g_a2048_fSquareRootTable[1024*2];
+/* div : */
+CPA_EXPORT unsigned long MTH_g_a1024_fInverse[1024];
+/* inv sqrt : */
+CPA_EXPORT unsigned long MTH_g_a2048_fInvSquareRootTable[1024*2];
+ 
+ 
+ 
+ 
+/* ##FUNCDEF#----------------------------------------------------------------------------
+                          Functions definition
+---------------------------------------------------------------------------------------*/
+ 
+ 
+/* ##-########################### 
+   ## SQRT
+   ############################## */
+ 
+/* ##F===================================================================================
+NAME :          MTH_fn_vInitSqrtRootOpt
+DESCRIPTION :   Initialize Square root table
+INPUT :         void
+OUTPUT :        void
+=======================================================================================*/
+void MTH_fn_vInitSqrtRootOpt( void )
+{
+  long i;
+  float ft;
+  unsigned long m;
+ 
+  for ( i=0; i<1024; i++)
+    {
+      ft = (float) sqrt((double) 1.0+((float)i/1024) );
+      m = *(long *)&ft;
+      m&= 0x7FFFFF;
+      MTH_g_a2048_fSquareRootTable[i+1024] = m;
+ 
+      ft = (float) ( sqrt(2.0)*sqrt((double) 1.0+((float)i/1024) ) );
+      m = *(long *)&ft;
+      m&= 0x7FFFFF;
+      MTH_g_a2048_fSquareRootTable[i] = m;
+    }
+}
+ 
+ 
+ 
+/* ##-########################### 
+   ## DIV
+   ############################## */
+ 
+/* ##F===================================================================================
+NAME :          MTH_fn_vInitInverseOpt
+DESCRIPTION :   Initialize Inverse table
+INPUT :         void
+OUTPUT :        void
+=======================================================================================*/
+void MTH_fn_vInitInverseOpt( void )
+{
+  long i;
+  float ft;
+ 
+  for ( i=0; i<1024; i++ )
+    {
+      ft = 1.0F / ( 1.0F + ((float)i/1024) );
+      MTH_g_a1024_fInverse[i]  = (*(long *)&ft) & 0x7FFFFF;
+    }
+  MTH_g_a1024_fInverse[0]=(1<<23); /* Because of problems with 2^n */
+}
+ 
+ 
+ 
+ 
+ 
+/* ##-########################### 
+   ## INV SQRT
+   ############################## */
+ 
+/* ##F===================================================================================
+NAME :          MTH_fn_vInitInvSqrtRootOpt
+DESCRIPTION :   Initialize Inverse Square root table
+INPUT :         void
+OUTPUT :        void
+=======================================================================================*/
+void MTH_fn_vInitInvSqrtRootOpt(void)
+{
+  long i;               /* index on the table   */
+  unsigned long m;      /* mantis               */
+  float ft;             /* float value          */
+    
+  for ( i=0; i<1024; i++ )
+    {        
+      ft = (float) ( 2.0/sqrt((double)( 1.0+((float)i/1024) )) );
+      m = *(long *)&ft;
+      m &= 0x7FFFFF;
+      MTH_g_a2048_fInvSquareRootTable[i+1024] = m;
+      ft = (float) ( sqrt(2.0)/sqrt((double)( 1.0+((float)i/1024) )) ); 
+      m = *(long *)&ft;
+      m &= 0x7FFFFF;
+      m+=0x800000;
+      MTH_g_a2048_fInvSquareRootTable[i] = m;
+    }  
+  MTH_g_a2048_fInvSquareRootTable[1024]=(1<<23);
+}
+ 
+ 
+ 
+/* ##-########################### 
+   ## INIT 
+   ############################## */
+ 
+/* ##F===================================================================================
+NAME :          MTH_fn_vInit
+DESCRIPTION :   Initialize all table if it not yet done
+INPUT :         void
+OUTPUT :        void
+=======================================================================================*/
+void MTH_fn_vInit( void )
+{
+  static unsigned char InitDone=0;
+ 
+  MTH_gs_dDecal= 3.0F*pow(2, 51);
+ 
+  if(InitDone==0)
+    {
+      MTH_fn_vInitSqrtRootOpt();
+      MTH_fn_vInitInverseOpt();
+      MTH_fn_vInitInvSqrtRootOpt();
+      InitDone=1;
+    }
+}
+ 
+ 
+ 
+#endif /* NOT U64 */
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+