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Handing the case of signed comparators.

This commit is contained in:
Alan Mishchenko 2025-08-09 14:46:45 -07:00
parent 1a18c9a3d8
commit 5e09cca964
2 changed files with 21 additions and 10 deletions
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13
src/aig/gia/giaGen.c
View File

@ -1192,9 +1192,9 @@ Gia_Man_t * Gia_ManGenNeuron( char * pFileName, int nIBits, int nLutSize, int fD
SeeAlso []
***********************************************************************/
Gia_Man_t * Gia_ManDupGenComp( int nBits, int fInterleave )
Gia_Man_t * Gia_ManDupGenComp( int nBits, int fInterleave, int fSigned )
{
Gia_Man_t * pNew, * pTemp; int i, iLit = 1;
Gia_Man_t * pNew, * pTemp; int i, iLit = 1, iLitXor = 0, iLitB = 0;
Vec_Int_t * vBitsA = Vec_IntAlloc( nBits + 1 );
Vec_Int_t * vBitsB = Vec_IntAlloc( nBits + 1 );
pNew = Gia_ManStart( 6*nBits+10 );
@ -1211,6 +1211,10 @@ Gia_Man_t * Gia_ManDupGenComp( int nBits, int fInterleave )
for ( i = 0; i < nBits; i++ )
Vec_IntPush( vBitsB, Gia_ManAppendCi(pNew) );
}
if ( fSigned ) {
iLitXor = Gia_ManHashXor( pNew, Vec_IntPop(vBitsA), (iLitB = Vec_IntPop(vBitsB)) );
nBits--;
}
Vec_IntPush( vBitsA, 0 );
Vec_IntPush( vBitsB, 0 );
for ( i = 0; i < nBits; i++ ) {
@ -1227,7 +1231,10 @@ Gia_Man_t * Gia_ManDupGenComp( int nBits, int fInterleave )
int iOrLit = Gia_ManHashOr(pNew, iOrLit0, iOrLit1 );
iLit = Gia_ManHashOr(pNew, Abc_LitNot(iLit), iOrLit );
}
Gia_ManAppendCo( pNew, Abc_LitNotCond(iLit, nBits&1) );
iLit = Abc_LitNotCond(iLit, nBits&1);
if ( fSigned )
iLit = Gia_ManHashMux(pNew, iLitXor, iLitB, iLit );
Gia_ManAppendCo( pNew, iLit );
pNew = Gia_ManCleanup( pTemp = pNew );
Gia_ManStop( pTemp );
Vec_IntFree( vBitsA );

18
src/base/abci/abc.c
View File

@ -56446,11 +56446,11 @@ usage:
***********************************************************************/
int Abc_CommandAbc9GenComp( Abc_Frame_t * pAbc, int argc, char ** argv )
{
extern Gia_Man_t * Gia_ManDupGenComp( int nBits, int fInterleave );
extern Gia_Man_t * Gia_ManDupGenComp( int nBits, int fInterleave, int fSigned );
Gia_Man_t * pTemp = NULL;
int c, nBits = 0, fInter = 0, fVerbose = 0;
int c, nBits = 4, fInter = 0, fSigned = 0, fVerbose = 0;
Extra_UtilGetoptReset();
while ( ( c = Extra_UtilGetopt( argc, argv, "Kivh" ) ) != EOF )
while ( ( c = Extra_UtilGetopt( argc, argv, "Kisvh" ) ) != EOF )
{
switch ( c )
{
@ -56468,6 +56468,9 @@ int Abc_CommandAbc9GenComp( Abc_Frame_t * pAbc, int argc, char ** argv )
case 'i':
fInter ^= 1;
break;
case 's':
fSigned ^= 1;
break;
case 'v':
fVerbose ^= 1;
break;
@ -56482,17 +56485,18 @@ int Abc_CommandAbc9GenComp( Abc_Frame_t * pAbc, int argc, char ** argv )
Abc_Print( -1, "Abc_CommandAbc9GenComp(): The number of inputs should be defined on the command line \"-K num\".\n" );
return 0;
}
pTemp = Gia_ManDupGenComp( nBits, fInter );
pTemp = Gia_ManDupGenComp( nBits, fInter, fSigned );
Abc_FrameUpdateGia( pAbc, pTemp );
if ( fVerbose )
Abc_Print( 1, "Generated %d-bit comparator.\n", nBits );
return 0;
usage:
Abc_Print( -2, "usage: &gencomp [-K <num>] [-ivh]\n" );
Abc_Print( -2, "\t generates the comparator\n" );
Abc_Print( -2, "\t-K num : the number of control inputs [default = undefined]\n" );
Abc_Print( -2, "usage: &gencomp [-K <num>] [-isvh]\n" );
Abc_Print( -2, "\t generates the comparator (a > b)\n" );
Abc_Print( -2, "\t-K num : the bitwidth of the inputs [default = %d]\n", nBits );
Abc_Print( -2, "\t-i : toggles using interleaved variable ordering [default = %s]\n", fInter ? "yes": "no" );
Abc_Print( -2, "\t-s : toggles generating signed comparator [default = %s]\n", fSigned ? "yes": "no" );
Abc_Print( -2, "\t-v : toggles printing verbose information [default = %s]\n", fVerbose ? "yes": "no" );
Abc_Print( -2, "\t-h : print the command usage\n");
return 1;