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
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
/**CFile****************************************************************
FileName [mapperSwitch.c]
PackageName [MVSIS 1.3: Multi-valued logic synthesis system.]
Synopsis [Generic technology mapping engine.]
Author [MVSIS Group]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - September 8, 2003.]
Revision [$Id: mapperSwitch.h,v 1.0 2003/09/08 00:00:00 alanmi Exp $]
***********************************************************************/
#include "mapperInt.h"
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
static float Map_SwitchCutRefDeref( Map_Node_t * pNode, Map_Cut_t * pCut, int fPhase, int fReference );
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**function*************************************************************
synopsis [Computes the exact area associated with the cut.]
description []
sideeffects []
seealso []
***********************************************************************/
float Map_SwitchCutGetDerefed( Map_Node_t * pNode, Map_Cut_t * pCut, int fPhase )
{
float aResult, aResult2;
// assert( pNode->Switching > 0 );
aResult2 = Map_SwitchCutRefDeref( pNode, pCut, fPhase, 1 ); // reference
aResult = Map_SwitchCutRefDeref( pNode, pCut, fPhase, 0 ); // dereference
// assert( aResult == aResult2 );
return aResult;
}
/**function*************************************************************
synopsis [References the cut.]
description []
sideeffects []
seealso []
***********************************************************************/
float Map_SwitchCutRef( Map_Node_t * pNode, Map_Cut_t * pCut, int fPhase )
{
return Map_SwitchCutRefDeref( pNode, pCut, fPhase, 1 ); // reference
}
/**function*************************************************************
synopsis [References the cut.]
description []
sideeffects []
seealso []
***********************************************************************/
float Map_SwitchCutDeref( Map_Node_t * pNode, Map_Cut_t * pCut, int fPhase )
{
return Map_SwitchCutRefDeref( pNode, pCut, fPhase, 0 ); // dereference
}
/**function*************************************************************
synopsis [References or dereferences the cut.]
description [This reference part is similar to Cudd_NodeReclaim().
The dereference part is similar to Cudd_RecursiveDeref().]
sideeffects []
seealso []
***********************************************************************/
float Map_SwitchCutRefDeref( Map_Node_t * pNode, Map_Cut_t * pCut, int fPhase, int fReference )
{
Map_Node_t * pNodeChild;
Map_Cut_t * pCutChild;
float aSwitchActivity;
int i, fPhaseChild;
// start switching activity for the node
aSwitchActivity = pNode->Switching;
// consider the elementary variable
if ( pCut->nLeaves == 1 )
return aSwitchActivity;
// go through the children
assert( pCut->M[fPhase].pSuperBest );
for ( i = 0; i < pCut->nLeaves; i++ )
{
pNodeChild = pCut->ppLeaves[i];
fPhaseChild = Map_CutGetLeafPhase( pCut, fPhase, i );
// get the reference counter of the child
if ( fReference )
{
if ( pNodeChild->pCutBest[0] && pNodeChild->pCutBest[1] ) // both phases are present
{
// if this phase of the node is referenced, there is no recursive call
pNodeChild->nRefAct[2]++;
if ( pNodeChild->nRefAct[fPhaseChild]++ > 0 )
continue;
}
else // only one phase is present
{
// inverter should be added if the phase
// (a) has no reference and (b) is implemented using other phase
if ( pNodeChild->nRefAct[fPhaseChild]++ == 0 && pNodeChild->pCutBest[fPhaseChild] == NULL )
aSwitchActivity += pNodeChild->Switching; // inverter switches the same as the node
// if the node is referenced, there is no recursive call
if ( pNodeChild->nRefAct[2]++ > 0 )
continue;
}
}
else
{
if ( pNodeChild->pCutBest[0] && pNodeChild->pCutBest[1] ) // both phases are present
{
// if this phase of the node is referenced, there is no recursive call
--pNodeChild->nRefAct[2];
if ( --pNodeChild->nRefAct[fPhaseChild] > 0 )
continue;
}
else // only one phase is present
{
// inverter should be added if the phase
// (a) has no reference and (b) is implemented using other phase
if ( --pNodeChild->nRefAct[fPhaseChild] == 0 && pNodeChild->pCutBest[fPhaseChild] == NULL )
aSwitchActivity += pNodeChild->Switching; // inverter switches the same as the node
// if the node is referenced, there is no recursive call
if ( --pNodeChild->nRefAct[2] > 0 )
continue;
}
assert( pNodeChild->nRefAct[fPhaseChild] >= 0 );
}
// get the child cut
pCutChild = pNodeChild->pCutBest[fPhaseChild];
// if the child does not have this phase mapped, take the opposite phase
if ( pCutChild == NULL )
{
fPhaseChild = !fPhaseChild;
pCutChild = pNodeChild->pCutBest[fPhaseChild];
}
// reference and compute area recursively
aSwitchActivity += Map_SwitchCutRefDeref( pNodeChild, pCutChild, fPhaseChild, fReference );
}
return aSwitchActivity;
}
/**Function*************************************************************
Synopsis [Computes the array of mapping.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
float Map_MappingGetSwitching( Map_Man_t * pMan, Map_NodeVec_t * vMapping )
{
Map_Node_t * pNode;
float Switch;
int i;
Switch = 0.0;
for ( i = 0; i < vMapping->nSize; i++ )
{
pNode = vMapping->pArray[i];
// at least one phase has the best cut assigned
assert( pNode->pCutBest[0] != NULL || pNode->pCutBest[1] != NULL );
// at least one phase is used in the mapping
assert( pNode->nRefAct[0] > 0 || pNode->nRefAct[1] > 0 );
// compute the array due to the supergate
if ( Map_NodeIsAnd(pNode) )
{
// count switching of the negative phase
if ( pNode->pCutBest[0] && (pNode->nRefAct[0] > 0 || pNode->pCutBest[1] == NULL) )
Switch += pNode->Switching;
// count switching of the positive phase
if ( pNode->pCutBest[1] && (pNode->nRefAct[1] > 0 || pNode->pCutBest[0] == NULL) )
Switch += pNode->Switching;
}
// count switching of the interver if we need to implement one phase with another phase
if ( (pNode->pCutBest[0] == NULL && pNode->nRefAct[0] > 0) ||
(pNode->pCutBest[1] == NULL && pNode->nRefAct[1] > 0) )
Switch += pNode->Switching; // inverter switches the same as the node
}
// add buffers for each CO driven by a CI
for ( i = 0; i < pMan->nOutputs; i++ )
if ( Map_NodeIsVar(pMan->pOutputs[i]) && !Map_IsComplement(pMan->pOutputs[i]) )
Switch += pMan->pOutputs[i]->Switching;
return Switch;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
|
