158 lines
4.3 KiB
C++
158 lines
4.3 KiB
C++
/*
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* Copyright (c) 2001 Stephen Williams (steve@icarus.com)
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*
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* This source code is free software; you can redistribute it
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* and/or modify it in source code form under the terms of the GNU
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* General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CVS_IDENT
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#ident "$Id: codes.cc,v 1.12 2002/08/12 01:35:07 steve Exp $"
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#endif
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# include "codes.h"
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# include "statistics.h"
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# include <string.h>
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# include <assert.h>
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const unsigned code_index0_size = 2 << 9;
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const unsigned code_index1_size = 2 << 11;
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const unsigned code_index2_size = 2 << 10;
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struct code_index0 {
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struct vvp_code_s table[code_index0_size];
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};
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struct code_index1 {
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struct code_index0* table[code_index1_size];
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};
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static vvp_cpoint_t code_count = 0;
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static struct code_index1*code_table[code_index2_size] = { 0 };
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/*
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* This initializes the code space. It sets up a code table and places
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* at address 0 a ZOMBIE instruction.
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*/
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void codespace_init(void)
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{
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code_table[0] = new struct code_index1;
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memset(code_table[0], 0, sizeof (struct code_index1));
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code_table[0]->table[0] = new struct code_index0;
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memset(code_table[0]->table[0], 0, sizeof(struct code_index0));
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vvp_code_t cp = code_table[0]->table[0]->table + 0;
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cp->opcode = &of_ZOMBIE;
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code_count = 1;
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size_opcodes += sizeof(struct code_index1);
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size_opcodes += sizeof(struct code_index0);
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}
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vvp_cpoint_t codespace_allocate(void)
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{
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vvp_cpoint_t idx = code_count;
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idx /= code_index0_size;
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unsigned index1 = idx % code_index1_size;
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idx /= code_index1_size;
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assert(idx < code_index2_size);
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if (code_table[idx] == 0) {
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code_table[idx] = new struct code_index1;
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memset(code_table[idx], 0, sizeof(struct code_index1));
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size_opcodes += sizeof(struct code_index1);
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}
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if (code_table[idx]->table[index1] == 0) {
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code_table[idx]->table[index1] = new struct code_index0;
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memset(code_table[idx]->table[index1],
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0, sizeof(struct code_index0));
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size_opcodes += sizeof(struct code_index0);
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}
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vvp_cpoint_t res = code_count;
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code_count += 1;
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count_opcodes += 1;
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return res;
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}
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vvp_cpoint_t codespace_next(void)
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{
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return code_count;
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}
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unsigned code_limit(void)
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{
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return code_count;
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}
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vvp_code_t codespace_index(vvp_cpoint_t point)
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{
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assert(point < code_count);
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unsigned index0 = point % code_index0_size;
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point /= code_index0_size;
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unsigned index1 = point % code_index1_size;
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point /= code_index1_size;
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return code_table[point]->table[index1]->table + index0;
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}
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/*
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* $Log: codes.cc,v $
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* Revision 1.12 2002/08/12 01:35:07 steve
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* conditional ident string using autoconfig.
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*
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* Revision 1.11 2002/07/05 03:46:43 steve
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* Track opcode memory space.
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*
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* Revision 1.10 2002/07/05 02:50:58 steve
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* Remove the vpi object symbol table after compile.
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*
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* Revision 1.9 2002/03/01 05:43:59 steve
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* Initialize all the codes tables.
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*
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* Revision 1.8 2001/05/09 04:23:18 steve
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* Now that the interactive debugger exists,
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* there is no use for the output dump.
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*
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* Revision 1.7 2001/04/13 03:55:18 steve
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* More complete reap of all threads.
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*
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* Revision 1.6 2001/04/01 06:40:44 steve
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* Support empty statements for hanging labels.
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*
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* Revision 1.5 2001/03/22 05:28:41 steve
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* Add code label forward references.
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*
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* Revision 1.4 2001/03/22 05:08:00 steve
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* implement %load, %inv, %jum/0 and %cmp/u
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*
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* Revision 1.3 2001/03/20 06:16:23 steve
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* Add support for variable vectors.
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*
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* Revision 1.2 2001/03/11 23:06:49 steve
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* Compact the vvp_code_s structure.
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*
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* Revision 1.1 2001/03/11 00:29:38 steve
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* Add the vvp engine to cvs.
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*
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*/
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