libveriuser/math.c

   1 /*
   2  * Copyright (c) 2003 Stephen Williams (steve@icarus.com)
   3  *
   4  *    This source code is free software; you can redistribute it
   5  *    and/or modify it in source code form under the terms of the GNU
   6  *    General Public License as published by the Free Software
   7  *    Foundation; either version 2 of the License, or (at your option)
   8  *    any later version.
   9  *
  10  *    This program is distributed in the hope that it will be useful,
  11  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *    GNU General Public License for more details.
  14  *
  15  *    You should have received a copy of the GNU General Public License
  16  *    along with this program; if not, write to the Free Software
  17  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  18  */
  19 #ifdef HAVE_CVS_IDENT
  20 #ident "$Id: math.c,v 1.3 2003/06/13 19:23:42 steve Exp $"
  21 #endif
  22
  23 # include <string.h>
  24 # include <stdlib.h>
  25 # include <assert.h>
  26 # include "config.h"
  27 # include "vpi_user.h"
  28 # include "veriuser.h"
  29
  30 void tf_multiply_long(PLI_INT32*aof_low1, PLI_INT32*aof_high1,
  31                       PLI_INT32 aof_low2, PLI_INT32 aof_high2)
  32 {
  33       ivl_u64_t a, b;
  34       a = *aof_high1;
  35       a = (a << 32) | *aof_low1;
  36       b = aof_high2;
  37       b = (b << 32) | aof_low2;
  38       a *= b;
  39       *aof_high1 = (a >> 32) & 0xffffffff;
  40       *aof_low1 = a & 0xffffffff;
  41 }
  42
  43 void tf_real_to_long(double real, PLI_INT32*low, PLI_INT32*high)
  44 {
  45       ivl_u64_t rtn = (ivl_u64_t)real;
  46       *high = (rtn >> 32) & 0xffffffff;
  47       *low = rtn & 0xffffffff;
  48 }
  49
  50 void tf_long_to_real(PLI_INT32 low, PLI_INT32 high, double *real)
  51 {
  52       ivl_u64_t a;
  53       a = high;
  54       a = (a << 32) | low;
  55       *real = (double)a;
  56 }
  57
  58 /*
  59  * $Log: math.c,v $
  60  * Revision 1.3  2003/06/13 19:23:42  steve
  61  *  Add a bunch more PLI1 routines.
  62  *
  63  * Revision 1.2  2003/06/04 01:56:20  steve
  64  * 1) Adds configure logic to clean up compiler warnings
  65  * 2) adds acc_compare_handle, acc_fetch_range, acc_next_scope and
  66  *    tf_isetrealdelay, acc_handle_scope
  67  * 3) makes acc_next reentrant
  68  * 4) adds basic vpiWire type support
  69  * 5) fills in some acc_object_of_type() and acc_fetch_{full}type()
  70  * 6) add vpiLeftRange/RigthRange to signals
  71  *
  72  * Revision 1.1  2003/04/23 15:01:29  steve
  73  *  Add tf_synchronize and tf_multiply_long.
  74  *
  75  */
  76