92 lines
2.3 KiB
C
92 lines
2.3 KiB
C
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/*
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* Copyright (c) 2005 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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#ident "$Id: eval_bool.c,v 1.1 2005/09/14 02:53:15 steve Exp $"
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/*
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* This file includes functions for evaluating REAL expressions.
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*/
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# include "config.h"
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# include "vvp_priv.h"
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# include <string.h>
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#ifdef HAVE_MALLOC_H
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# include <malloc.h>
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#endif
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# include <stdlib.h>
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# include <stdint.h>
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# include <math.h>
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# include <assert.h>
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/*
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* Evaluate the bool64 the hard way, by evaluating the logic vector
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* and converting it to a bool64.
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*/
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static int eval_bool64_logic(ivl_expr_t exp)
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{
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int res;
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struct vector_info tmp;
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tmp = draw_eval_expr(exp, STUFF_OK_XZ);
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res = allocate_word();
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fprintf(vvp_out, " %%ix/get %d, %u, %u;\n", res, tmp.base, tmp.wid);
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clr_vector(tmp);
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return res;
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}
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static int draw_number_bool64(ivl_expr_t exp)
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{
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int res;
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const char*bits = ivl_expr_bits(exp);
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uint64_t val = 0;
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unsigned long idx;
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for (idx = 0 ; idx < ivl_expr_width(exp) ; idx += 1) {
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if (bits[idx] == '1')
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val |= 1UL << idx;
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}
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res = allocate_word();
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fprintf(vvp_out, " %%ix/load %d, %lu;\n", res, val);
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return res;
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}
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int draw_eval_bool64(ivl_expr_t exp)
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{
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int res;
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switch (ivl_expr_type(exp)) {
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case IVL_EX_NUMBER:
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res = draw_number_bool64(exp);
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break;
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default:
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res = eval_bool64_logic(exp);
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break;
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}
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return res;
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}
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/*
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* $Log: eval_bool.c,v $
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* Revision 1.1 2005/09/14 02:53:15 steve
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* Support bool expressions and compares handle them optimally.
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*
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*/
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