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
|
/**CFile****************************************************************
FileName [mapperCore.c]
PackageName [MVSIS 1.3: Multi-valued logic synthesis system.]
Synopsis [Generic technology mapping engine.]
Author [MVSIS Group]
Affiliation [UC Berkeley]
Date [Ver. 2.0. Started - June 1, 2004.]
Revision [$Id: mapperCore.c,v 1.7 2004/10/01 23:41:04 satrajit Exp $]
***********************************************************************/
#include "mapperInt.h"
//#include "resm.h"
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Performs technology mapping for the given object graph.]
Description [The object graph is stored in the mapping manager.
First, the AND nodes that fanout into POs are collected in the DFS order.
Two preprocessing steps are performed: the k-feasible cuts are computed
for each node and the truth tables are computed for each cut. Next, the
delay-optimal matches are assigned for each node, followed by several
iterations of area recoveryd: using area flow (global optimization)
and using exact area at a node (local optimization).]
SideEffects []
SeeAlso []
***********************************************************************/
int Map_Mapping( Map_Man_t * p )
{
int fUseAreaFlow = 1;
int fUseExactArea = 1;
int fUseExactAreaWithPhase = 1;
int clk;
//////////////////////////////////////////////////////////////////////
// perform pre-mapping computations
// collect the nodes reachable from POs in the DFS order (including the choices)
p->vAnds = Map_MappingDfs( p, 1 );
if ( p->fVerbose )
Map_MappingReportChoices( p );
Map_MappingSetChoiceLevels( p ); // should always be called before mapping!
// return 1;
// compute the cuts of nodes in the DFS order
clk = clock();
Map_MappingCuts( p );
p->timeCuts = clock() - clk;
// derive the truth tables
clk = clock();
Map_MappingTruths( p );
p->timeTruth = clock() - clk;
//////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
// compute the minimum-delay mapping
clk = clock();
p->fMappingMode = 0;
if ( !Map_MappingMatches( p ) )
return 0;
p->timeMatch = clock() - clk;
// compute the references and collect the nodes used in the mapping
Map_MappingSetRefs( p );
p->AreaBase = Map_MappingGetArea( p, p->vMapping );
if ( p->fVerbose )
{
printf( "Delay : Delay = %5.2f Flow = %11.1f Area = %11.1f %4.1f %% ",
p->fRequiredGlo, Map_MappingGetAreaFlow(p), p->AreaBase, 0.0 );
PRT( "Time", p->timeMatch );
}
//////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
// perform area recovery using area flow
clk = clock();
if ( fUseAreaFlow )
{
// compute the required times and the fanouts
Map_TimeComputeRequiredGlobal( p );
// recover area flow
p->fMappingMode = 1;
Map_MappingMatches( p );
// compute the references and collect the nodes used in the mapping
Map_MappingSetRefs( p );
p->AreaFinal = Map_MappingGetArea( p, p->vMapping );
if ( p->fVerbose )
{
printf( "AreaFlow : Delay = %5.2f Flow = %11.1f Area = %11.1f %4.1f %% ",
p->fRequiredGlo, Map_MappingGetAreaFlow(p), p->AreaFinal,
100.0*(p->AreaBase-p->AreaFinal)/p->AreaBase );
PRT( "Time", clock() - clk );
}
}
p->timeArea += clock() - clk;
//////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
// perform area recovery using exact area
clk = clock();
if ( fUseExactArea )
{
// compute the required times and the fanouts
Map_TimeComputeRequiredGlobal( p );
// recover area flow
p->fMappingMode = 2;
Map_MappingMatches( p );
// compute the references and collect the nodes used in the mapping
Map_MappingSetRefs( p );
p->AreaFinal = Map_MappingGetArea( p, p->vMapping );
if ( p->fVerbose )
{
printf( "Area : Delay = %5.2f Flow = %11.1f Area = %11.1f %4.1f %% ",
p->fRequiredGlo, 0.0, p->AreaFinal,
100.0*(p->AreaBase-p->AreaFinal)/p->AreaBase );
PRT( "Time", clock() - clk );
}
}
p->timeArea += clock() - clk;
//////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
// perform area recovery using exact area
clk = clock();
if ( fUseExactAreaWithPhase )
{
// compute the required times and the fanouts
Map_TimeComputeRequiredGlobal( p );
// recover area flow
p->fMappingMode = 3;
Map_MappingMatches( p );
// compute the references and collect the nodes used in the mapping
Map_MappingSetRefs( p );
p->AreaFinal = Map_MappingGetArea( p, p->vMapping );
if ( p->fVerbose )
{
printf( "Area : Delay = %5.2f Flow = %11.1f Area = %11.1f %4.1f %% ",
p->fRequiredGlo, 0.0, p->AreaFinal,
100.0*(p->AreaBase-p->AreaFinal)/p->AreaBase );
PRT( "Time", clock() - clk );
}
}
p->timeArea += clock() - clk;
//////////////////////////////////////////////////////////////////////
// print the arrival times of the latest outputs
if ( p->fVerbose )
Map_MappingPrintOutputArrivals( p );
return 1;
}
|