1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
/**CFile****************************************************************
FileName [exorUtil.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Exclusive sum-of-product minimization.]
Synopsis [Utilities.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: exorUtil.c,v 1.0 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
////////////////////////////////////////////////////////////////////////
/// ///
/// Implementation of EXORCISM - 4 ///
/// An Exclusive Sum-of-Product Minimizer ///
/// Alan Mishchenko <alanmi@ee.pdx.edu> ///
/// ///
////////////////////////////////////////////////////////////////////////
/// ///
/// Utility Functions ///
/// ///
/// 1) allocating memory for and creating the ESOP cover ///
/// 2) writing the resultant cover into an ESOP PLA file ///
/// ///
/// Ver. 1.0. Started - July 15, 2000. Last update - July 20, 2000 ///
/// Ver. 1.4. Started - Aug 10, 2000. Last update - Aug 10, 2000 ///
/// Ver. 1.5. Started - Aug 19, 2000. Last update - Aug 19, 2000 ///
/// Ver. 1.7. Started - Sep 20, 2000. Last update - Sep 23, 2000 ///
/// ///
////////////////////////////////////////////////////////////////////////
/// This software was tested with the BDD package "CUDD", v.2.3.0 ///
/// by Fabio Somenzi ///
/// http://vlsi.colorado.edu/~fabio/ ///
////////////////////////////////////////////////////////////////////////
#include "exor.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// EXTERNAL VARIABLES ////
////////////////////////////////////////////////////////////////////////
// information about the options, the function, and the cover
extern cinfo g_CoverInfo;
////////////////////////////////////////////////////////////////////////
/// EXTERNAL FUNCTIONS ///
////////////////////////////////////////////////////////////////////////
// Cube Cover Iterator
// starts an iterator that traverses all the cubes in the ring
extern Cube* IterCubeSetStart();
// returns the next cube in the ring
extern Cube* IterCubeSetNext();
// retrieves the variable from the cube
extern varvalue GetVar( Cube* pC, int Var );
////////////////////////////////////////////////////////////////////////
/// FUNCTION DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////
//////////// Cover Service Procedures /////////////////
///////////////////////////////////////////////////////////////////
int CountLiterals()
// nCubesAlloc is the number of allocated cubes
{
Cube* p;
int Value, v;
int LitCounter = 0;
int LitCounterControl = 0;
for ( p = IterCubeSetStart( ); p; p = IterCubeSetNext() )
{
LitCounterControl += p->a;
assert( p->fMark == 0 );
// write the input variables
for ( v = 0; v < g_CoverInfo.nVarsIn; v++ )
{
Value = GetVar( p, v );
if ( Value == VAR_NEG )
LitCounter++;
else if ( Value == VAR_POS )
LitCounter++;
else if ( Value != VAR_ABS )
{
assert(0);
}
}
}
if ( LitCounterControl != LitCounter )
printf( "Warning! The recorded number of literals (%d) differs from the actual number (%d)\n", LitCounterControl, LitCounter );
return LitCounter;
}
void WriteTableIntoFile( FILE * pFile )
// nCubesAlloc is the number of allocated cubes
{
int v, w;
Cube * p;
int cOutputs;
int nOutput;
int WordSize;
for ( p = IterCubeSetStart( ); p; p = IterCubeSetNext() )
{
assert( p->fMark == 0 );
// write the input variables
for ( v = 0; v < g_CoverInfo.nVarsIn; v++ )
{
int Value = GetVar( p, v );
if ( Value == VAR_NEG )
fprintf( pFile, "0" );
else if ( Value == VAR_POS )
fprintf( pFile, "1" );
else if ( Value == VAR_ABS )
fprintf( pFile, "-" );
else
assert(0);
}
fprintf( pFile, " " );
// write the output variables
cOutputs = 0;
nOutput = g_CoverInfo.nVarsOut;
WordSize = 8*sizeof( unsigned );
for ( w = 0; w < g_CoverInfo.nWordsOut; w++ )
for ( v = 0; v < WordSize; v++ )
{
if ( p->pCubeDataOut[w] & (1<<v) )
fprintf( pFile, "1" );
else
fprintf( pFile, "0" );
if ( ++cOutputs == nOutput )
break;
}
fprintf( pFile, "\n" );
}
}
int WriteResultIntoFile( char * pFileName )
// write the ESOP cover into the PLA file <NewFileName>
{
FILE * pFile;
time_t ltime;
char * TimeStr;
pFile = fopen( pFileName, "w" );
if ( pFile == NULL )
{
fprintf( pFile, "\n\nCannot open the output file\n" );
return 1;
}
// get current time
time( <ime );
TimeStr = asctime( localtime( <ime ) );
// get the number of literals
g_CoverInfo.nLiteralsAfter = CountLiterals();
fprintf( pFile, "# EXORCISM-4 output for command line arguments: " );
fprintf( pFile, "\"-Q %d -V %d\"\n", g_CoverInfo.Quality, g_CoverInfo.Verbosity );
fprintf( pFile, "# Minimization performed %s", TimeStr );
fprintf( pFile, "# Initial statistics: " );
fprintf( pFile, "Cubes = %d Literals = %d\n", g_CoverInfo.nCubesBefore, g_CoverInfo.nLiteralsBefore );
fprintf( pFile, "# Final statistics: " );
fprintf( pFile, "Cubes = %d Literals = %d\n", g_CoverInfo.nCubesInUse, g_CoverInfo.nLiteralsAfter );
fprintf( pFile, "# File reading and reordering time = %.2f sec\n", TICKS_TO_SECONDS(g_CoverInfo.TimeRead) );
fprintf( pFile, "# Starting cover generation time = %.2f sec\n", TICKS_TO_SECONDS(g_CoverInfo.TimeStart) );
fprintf( pFile, "# Pure ESOP minimization time = %.2f sec\n", TICKS_TO_SECONDS(g_CoverInfo.TimeMin) );
fprintf( pFile, ".i %d\n", g_CoverInfo.nVarsIn );
fprintf( pFile, ".o %d\n", g_CoverInfo.nVarsOut );
fprintf( pFile, ".p %d\n", g_CoverInfo.nCubesInUse );
fprintf( pFile, ".type esop\n" );
WriteTableIntoFile( pFile );
fprintf( pFile, ".e\n" );
fclose( pFile );
return 0;
}
///////////////////////////////////////////////////////////////////
//////////// End of File /////////////////
///////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
|