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/**CFile****************************************************************
FileName [cbaReadBlif.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Verilog parser.]
Synopsis [Parses several flavors of word-level Verilog.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - November 29, 2014.]
Revision [$Id: cbaReadBlif.c,v 1.00 2014/11/29 00:00:00 alanmi Exp $]
***********************************************************************/
#include "cba.h"
#include "cbaPrs.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
// BLIF keywords
typedef enum {
CBA_BLIF_NONE = 0, // 0: unused
CBA_BLIF_MODEL, // 1: .model
CBA_BLIF_INPUTS, // 2: .inputs
CBA_BLIF_OUTPUTS, // 3: .outputs
CBA_BLIF_NAMES, // 4: .names
CBA_BLIF_SUBCKT, // 5: .subckt
CBA_BLIF_GATE, // 6: .gate
CBA_BLIF_LATCH, // 7: .latch
CBA_BLIF_END, // 8: .end
CBA_BLIF_UNKNOWN // 9: unknown
} Cba_BlifType_t;
const char * s_BlifTypes[CBA_BLIF_UNKNOWN+1] = {
NULL, // 0: unused
".model", // 1: .model
".inputs", // 2: .inputs
".outputs", // 3: .outputs
".names", // 4: .names
".subckt", // 5: .subckt
".gate", // 6: .gate
".latch", // 7: .latch
".end", // 8: .end
NULL // 9: unknown
};
static inline void Cba_PrsAddBlifDirectives( Cba_Prs_t * p )
{
int i;
for ( i = 1; s_BlifTypes[i]; i++ )
Abc_NamStrFindOrAdd( p->pDesign->pNames, (char *)s_BlifTypes[i], NULL );
assert( Abc_NamObjNumMax(p->pDesign->pNames) == i );
}
static inline int Cba_PrsIsSpace( char c ) { return c == ' ' || c == '\t' || c == '\r'; }
static inline int Cba_PrsIsOk( Cba_Prs_t * p ) { return (int)(p->pCur < p->pLimit); }
static inline int Cba_PrsIsChar( Cba_Prs_t * p, char c ) { return *p->pCur == 'c'; }
static inline int Cba_PrsIsLit( Cba_Prs_t * p ) { return *p->pCur == '0' || *p->pCur == '1' || *p->pCur == '-'; }
static inline void Cba_PrsSkipToChar( Cba_Prs_t * p, char c ) { while ( *p->pCur != c ) p->pCur++; }
static inline char Cba_PrsSkip( Cba_Prs_t * p ) { return *p->pCur++; }
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Reading names.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline void Cba_PrsSkipSpaces( Cba_Prs_t * p )
{
while ( Cba_PrsIsSpace(*p->pCur) )
Cba_PrsSkip(p);
if ( Cba_PrsIsChar(p, '#') )
Cba_PrsSkipToChar( p, '\n' );
else if ( Cba_PrsIsChar(p, '\\') )
{
Cba_PrsSkipToChar( p, '\n' );
Cba_PrsSkip(p);
Cba_PrsSkipSpaces( p );
}
}
static inline int Cba_PrsReadName( Cba_Prs_t * p )
{
char * pStart = p->pCur;
while ( !Cba_PrsIsSpace(*p->pCur) && !Cba_PrsIsChar(p, '\\') )
Cba_PrsSkip(p);
if ( pStart == p->pCur )
return 0;
return Abc_NamStrFindOrAddLim( p->pDesign->pNames, pStart, p->pCur, NULL );
}
static inline int Cba_PrsReadName2( Cba_Prs_t * p )
{
char * pStart = p->pCur;
while ( !Cba_PrsIsSpace(*p->pCur) && !Cba_PrsIsChar(p, '\\') && !Cba_PrsIsChar(p, '=') )
Cba_PrsSkip(p);
if ( pStart == p->pCur )
return 0;
return Abc_NamStrFindOrAddLim( p->pDesign->pNames, pStart, p->pCur, NULL );
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline int Cba_PrsReadCube( Cba_Prs_t * p )
{
while ( Cba_PrsIsLit(p) )
Vec_StrPush( p->vCover, Cba_PrsSkip(p) );
Cba_PrsSkipSpaces( p );
Vec_StrPush( p->vCover, ' ' );
if ( !Cba_PrsIsLit(p) ) return Cba_PrsErrorSet(p, "Cannot detect output literal.", 1);
Vec_StrPush( p->vCover, Cba_PrsSkip(p) );
return 1;
}
static inline void Cba_PrsSaveCover( Cba_Prs_t * p )
{
int iToken;
assert( Vec_StrSize(p->vCover) > 0 );
Vec_StrPush( p->vCover, '\0' );
iToken = Abc_NamStrFindOrAdd( p->pDesign->pFuncs, Vec_StrArray(p->vCover), NULL );
Vec_StrClear( p->vCover );
assert( Vec_IntEntryLast(p->vFuncsCur) == 1 );
Vec_IntWriteEntry( p->vFuncsCur, Vec_IntSize(p->vFuncsCur)-1, iToken );
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline int Cba_PrsReadSignals( Cba_Prs_t * p, int fSkipFirst )
{
Cba_PrsSkipSpaces( p );
Vec_IntFill( p->vTemp, fSkipFirst, -1 );
while ( !Cba_PrsIsChar(p, '\n') )
{
Vec_IntPush( p->vTemp, Cba_PrsReadName(p) );
Cba_PrsSkipSpaces( p );
}
if ( Vec_IntSize(p->vTemp) == 0 ) return Cba_PrsErrorSet(p, "List of signals is empty.", 1);
if ( Vec_IntCountZero(p->vTemp) ) return Cba_PrsErrorSet(p, "Cannot read names in the list.", 1);
return 0;
}
static inline int Cba_PrsReadInputs( Cba_Prs_t * p )
{
if ( Cba_PrsReadSignals(p, 0) ) return 1;
Vec_IntAppend( p->vInputsCur, p->vTemp );
return 0;
}
static inline int Cba_PrsReadOutputs( Cba_Prs_t * p )
{
if ( Cba_PrsReadSignals(p, 0) ) return 1;
Vec_IntAppend( p->vOutputsCur, p->vTemp );
return 0;
}
static inline int Cba_PrsReadNode( Cba_Prs_t * p )
{
if ( Cba_PrsReadSignals(p, 1) ) return 1;
Vec_IntWriteEntry( p->vTemp, 0, Vec_IntPop(p->vTemp) );
// save results
Vec_IntPush( p->vFuncsCur, 1 );
Vec_IntPush( p->vTypesCur, CBA_PRS_NODE );
Cba_PrsSetupVecInt( p, Vec_WecPushLevel(p->vFaninsCur), p->vTemp );
return 0;
}
static inline int Cba_PrsReadBox( Cba_Prs_t * p, int fGate )
{
Cba_PrsSkipSpaces( p );
if ( Cba_PrsIsChar(p, '\n') ) return Cba_PrsErrorSet(p, "Cannot read model name.", 1);
Vec_IntPush( p->vFuncsCur, Cba_PrsReadName(p) );
Cba_PrsSkipSpaces( p );
if ( Cba_PrsIsChar(p, '\n') ) return Cba_PrsErrorSet(p, "Cannot read formal/actual inputs.", 1);
while ( !Cba_PrsIsChar(p, '\n') )
{
Vec_IntPush( p->vTemp, Cba_PrsReadName(p) );
Cba_PrsSkipSpaces( p );
if ( !Cba_PrsIsChar(p, '=') ) return Cba_PrsErrorSet(p, "Cannot find symbol \'=\'.", 1);
p->pCur++;
Cba_PrsSkipSpaces( p );
Vec_IntPush( p->vTemp, Cba_PrsReadName(p) );
Cba_PrsSkipSpaces( p );
}
// save results
Vec_IntPush( p->vTypesCur, CBA_PRS_BOX );
Cba_PrsSetupVecInt( p, Vec_WecPushLevel(p->vFaninsCur), p->vTemp );
return 0;
}
static inline int Cba_PrsReadLatch( Cba_Prs_t * p )
{
Vec_IntFill( p->vTemp, 2, -1 );
Cba_PrsSkipSpaces( p );
if ( Cba_PrsIsChar(p, '\n') ) return Cba_PrsErrorSet(p, "Cannot read latch input.", 1);
Vec_IntWriteEntry( p->vTemp, 1, Cba_PrsReadName(p) );
Cba_PrsSkipSpaces( p );
if ( Cba_PrsIsChar(p, '\n') ) return Cba_PrsErrorSet(p, "Cannot read latch output.", 1);
Vec_IntWriteEntry( p->vTemp, 0, Cba_PrsReadName(p) );
if ( Cba_PrsIsChar(p, '0') )
Vec_IntPush( p->vFuncsCur, 0 );
else if ( Cba_PrsIsChar(p, '1') )
Vec_IntPush( p->vFuncsCur, 1 );
else if ( Cba_PrsIsChar(p, '2') || Cba_PrsIsChar(p, '\n') )
Vec_IntPush( p->vFuncsCur, 2 );
else return Cba_PrsErrorSet(p, "Cannot read latch init value.", 1);
// save results
Vec_IntPush( p->vTypesCur, CBA_PRS_LATCH );
Cba_PrsSetupVecInt( p, Vec_WecPushLevel(p->vFaninsCur), p->vTemp );
return 0;
}
static inline int Cba_PrsReadModel( Cba_Prs_t * p )
{
Cba_PrsSkipSpaces( p );
if ( Vec_IntSize(p->vInputsCur) > 0 ) return Cba_PrsErrorSet(p, "Parsing previous model is unfinished.", 1);
p->iModuleName = Cba_PrsReadName( p );
if ( p->iModuleName == 0 ) return Cba_PrsErrorSet(p, "Cannot read model name.", 1);
Cba_PrsSkipSpaces( p );
if ( !Cba_PrsIsChar(p, '\n') ) return Cba_PrsErrorSet(p, "Trailing symbols on .model line.", 1);
return 0;
}
static inline int Cba_PrsReadEnd( Cba_Prs_t * p )
{
if ( Vec_IntSize(p->vInputsCur) == 0 ) return Cba_PrsErrorSet(p, "Directive .end without .model.", 1);
Cba_PrsAddCurrentModel( p, p->iModuleName );
return 0;
}
static inline int Cba_PrsReadDirective( Cba_Prs_t * p )
{
int iToken;
if ( !Cba_PrsIsChar(p, '.') )
return Cba_PrsReadCube( p );
if ( Vec_StrSize(p->vCover) > 0 ) // SOP was specified for the previous node
Cba_PrsSaveCover( p );
iToken = Cba_PrsReadName( p );
if ( iToken == CBA_BLIF_MODEL )
return Cba_PrsReadModel( p );
if ( iToken == CBA_BLIF_INPUTS )
return Cba_PrsReadInputs( p );
if ( iToken == CBA_BLIF_OUTPUTS )
return Cba_PrsReadOutputs( p );
if ( iToken == CBA_BLIF_NAMES )
return Cba_PrsReadNode( p );
if ( iToken == CBA_BLIF_SUBCKT )
return Cba_PrsReadBox( p, 0 );
if ( iToken == CBA_BLIF_GATE )
return Cba_PrsReadBox( p, 1 );
if ( iToken == CBA_BLIF_LATCH )
return Cba_PrsReadLatch( p );
if ( iToken == CBA_BLIF_END )
return Cba_PrsReadEnd( p );
assert( 0 );
return 1;
}
static inline int Cba_PrsReadLines( Cba_Prs_t * p )
{
while ( Cba_PrsIsChar(p, '\n') )
{
p->pCur++; Cba_PrsSkipSpaces( p );
if ( Cba_PrsIsChar(p, '\n') )
continue;
if ( Cba_PrsReadDirective( p ) )
return 1;
}
return 0;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Cba_Man_t * Cba_PrsReadBlif( char * pFileName )
{
Cba_Man_t * pDesign = NULL;
Cba_Prs_t * p = Cba_PrsAlloc( pFileName );
if ( p == NULL )
return NULL;
Cba_PrsAddBlifDirectives( p );
Cba_PrsReadLines( p );
if ( Cba_PrsErrorPrint(p) )
ABC_SWAP( Cba_Man_t *, pDesign, p->pDesign );
Cba_PrsFree( p );
return pDesign;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
|
