diff options
Diffstat (limited to 'src/opt/dau/dauDsd.c')
-rw-r--r-- | src/opt/dau/dauDsd.c | 161 |
1 files changed, 134 insertions, 27 deletions
diff --git a/src/opt/dau/dauDsd.c b/src/opt/dau/dauDsd.c index c2cfad35..e6981c91 100644 --- a/src/opt/dau/dauDsd.c +++ b/src/opt/dau/dauDsd.c @@ -27,17 +27,7 @@ ABC_NAMESPACE_IMPL_START /// DECLARATIONS /// //////////////////////////////////////////////////////////////////////// -#define DAU_MAX_STR 300 - -static word s_Truth6[6] = -{ - 0xAAAAAAAAAAAAAAAA, - 0xCCCCCCCCCCCCCCCC, - 0xF0F0F0F0F0F0F0F0, - 0xFF00FF00FF00FF00, - 0xFFFF0000FFFF0000, - 0xFFFFFFFF00000000 -}; +#define DAU_MAX_STR 256 /* This code performs truth-table-based decomposition for 6-variable functions. @@ -85,7 +75,7 @@ word Dau_DsdToTruth_rec( char ** p ) if ( **p == '!' ) (*p)++, fCompl = 1; if ( **p >= 'a' && **p <= 'f' ) - return fCompl ? ~s_Truth6[**p - 'a'] : s_Truth6[**p - 'a']; + return fCompl ? ~s_Truths6[**p - 'a'] : s_Truths6[**p - 'a']; if ( **p == '(' || **p == '[' || **p == '<' ) { word Res = 0; @@ -197,12 +187,12 @@ int Dau_DsdPerform_rec( word t, char * pBuffer, int Pos, int * pVars, int nVars // special case when function is a var if ( nVarsNew == 1 ) { - if ( t == s_Truth6[ pVarsNew[0] ] ) + if ( t == s_Truths6[ pVarsNew[0] ] ) { pBuffer[Pos++] = 'a' + pVarsNew[0]; return Pos; } - if ( t == ~s_Truth6[ pVarsNew[0] ] ) + if ( t == ~s_Truths6[ pVarsNew[0] ] ) { pBuffer[Pos++] = '!'; pBuffer[Pos++] = 'a' + pVarsNew[0]; @@ -274,7 +264,7 @@ int Dau_DsdPerform_rec( word t, char * pBuffer, int Pos, int * pVars, int nVars { PosStart = Pos; sprintf( pNest, "(%c%c)", 'a' + pVarsNew[v], 'a' + pVarsNew[u] ); - Pos = Dau_DsdPerform_rec( (s_Truth6[pVarsNew[u]] & Cof[3]) | (~s_Truth6[pVarsNew[u]] & Cof[0]), pBuffer, Pos, pVarsNew, nVarsNew ); + Pos = Dau_DsdPerform_rec( (s_Truths6[pVarsNew[u]] & Cof[3]) | (~s_Truths6[pVarsNew[u]] & Cof[0]), pBuffer, Pos, pVarsNew, nVarsNew ); Pos = Dau_DsdPerformReplace( pBuffer, PosStart, Pos, 'a' + pVarsNew[u], pNest ); return Pos; } @@ -282,7 +272,7 @@ int Dau_DsdPerform_rec( word t, char * pBuffer, int Pos, int * pVars, int nVars { PosStart = Pos; sprintf( pNest, "(%c!%c)", 'a' + pVarsNew[v], 'a' + pVarsNew[u] ); - Pos = Dau_DsdPerform_rec( (s_Truth6[pVarsNew[u]] & Cof[2]) | (~s_Truth6[pVarsNew[u]] & Cof[0]), pBuffer, Pos, pVarsNew, nVarsNew ); + Pos = Dau_DsdPerform_rec( (s_Truths6[pVarsNew[u]] & Cof[2]) | (~s_Truths6[pVarsNew[u]] & Cof[0]), pBuffer, Pos, pVarsNew, nVarsNew ); Pos = Dau_DsdPerformReplace( pBuffer, PosStart, Pos, 'a' + pVarsNew[u], pNest ); return Pos; } @@ -290,7 +280,7 @@ int Dau_DsdPerform_rec( word t, char * pBuffer, int Pos, int * pVars, int nVars { PosStart = Pos; sprintf( pNest, "(!%c%c)", 'a' + pVarsNew[v], 'a' + pVarsNew[u] ); - Pos = Dau_DsdPerform_rec( (s_Truth6[pVarsNew[u]] & Cof[1]) | (~s_Truth6[pVarsNew[u]] & Cof[0]), pBuffer, Pos, pVarsNew, nVarsNew ); + Pos = Dau_DsdPerform_rec( (s_Truths6[pVarsNew[u]] & Cof[1]) | (~s_Truths6[pVarsNew[u]] & Cof[0]), pBuffer, Pos, pVarsNew, nVarsNew ); Pos = Dau_DsdPerformReplace( pBuffer, PosStart, Pos, 'a' + pVarsNew[u], pNest ); return Pos; } @@ -298,7 +288,7 @@ int Dau_DsdPerform_rec( word t, char * pBuffer, int Pos, int * pVars, int nVars { PosStart = Pos; sprintf( pNest, "(!%c!%c)", 'a' + pVarsNew[v], 'a' + pVarsNew[u] ); - Pos = Dau_DsdPerform_rec( (s_Truth6[pVarsNew[u]] & Cof[0]) | (~s_Truth6[pVarsNew[u]] & Cof[1]), pBuffer, Pos, pVarsNew, nVarsNew ); + Pos = Dau_DsdPerform_rec( (s_Truths6[pVarsNew[u]] & Cof[0]) | (~s_Truths6[pVarsNew[u]] & Cof[1]), pBuffer, Pos, pVarsNew, nVarsNew ); Pos = Dau_DsdPerformReplace( pBuffer, PosStart, Pos, 'a' + pVarsNew[u], pNest ); return Pos; } @@ -306,7 +296,7 @@ int Dau_DsdPerform_rec( word t, char * pBuffer, int Pos, int * pVars, int nVars { PosStart = Pos; sprintf( pNest, "[%c%c]", 'a' + pVarsNew[v], 'a' + pVarsNew[u] ); - Pos = Dau_DsdPerform_rec( (s_Truth6[pVarsNew[u]] & Cof[1]) | (~s_Truth6[pVarsNew[u]] & Cof[0]), pBuffer, Pos, pVarsNew, nVarsNew ); + Pos = Dau_DsdPerform_rec( (s_Truths6[pVarsNew[u]] & Cof[1]) | (~s_Truths6[pVarsNew[u]] & Cof[0]), pBuffer, Pos, pVarsNew, nVarsNew ); Pos = Dau_DsdPerformReplace( pBuffer, PosStart, Pos, 'a' + pVarsNew[u], pNest ); return Pos; } @@ -408,16 +398,16 @@ char * Dau_DsdPerform( word t ) ***********************************************************************/ void Dau_DsdTest() { -// word t = s_Truth6[0] & s_Truth6[1] & s_Truth6[2]; -// word t = ~s_Truth6[0] | (s_Truth6[1] ^ ~s_Truth6[2]); -// word t = (s_Truth6[1] & s_Truth6[2]) | (s_Truth6[0] & s_Truth6[3]); -// word t = (~s_Truth6[1] & ~s_Truth6[2]) | (s_Truth6[0] ^ s_Truth6[3]); -// word t = ((~s_Truth6[1] & ~s_Truth6[2]) | (s_Truth6[0] ^ s_Truth6[3])) ^ s_Truth6[5]; -// word t = ((s_Truth6[1] & ~s_Truth6[2]) ^ (s_Truth6[0] & s_Truth6[3])) & s_Truth6[5]; -// word t = (~(~s_Truth6[0] & ~s_Truth6[4]) & s_Truth6[2]) | (~s_Truth6[1] & ~s_Truth6[0] & ~s_Truth6[4]); +// word t = s_Truths6[0] & s_Truths6[1] & s_Truths6[2]; +// word t = ~s_Truths6[0] | (s_Truths6[1] ^ ~s_Truths6[2]); +// word t = (s_Truths6[1] & s_Truths6[2]) | (s_Truths6[0] & s_Truths6[3]); +// word t = (~s_Truths6[1] & ~s_Truths6[2]) | (s_Truths6[0] ^ s_Truths6[3]); +// word t = ((~s_Truths6[1] & ~s_Truths6[2]) | (s_Truths6[0] ^ s_Truths6[3])) ^ s_Truths6[5]; +// word t = ((s_Truths6[1] & ~s_Truths6[2]) ^ (s_Truths6[0] & s_Truths6[3])) & s_Truths6[5]; +// word t = (~(~s_Truths6[0] & ~s_Truths6[4]) & s_Truths6[2]) | (~s_Truths6[1] & ~s_Truths6[0] & ~s_Truths6[4]); // word t = 0x0000000000005F3F; // word t = 0xF3F5030503050305; -// word t = (s_Truth6[0] & s_Truth6[1] & (s_Truth6[2] ^ s_Truth6[4])) | (~s_Truth6[0] & ~s_Truth6[1] & ~(s_Truth6[2] ^ s_Truth6[4])); +// word t = (s_Truths6[0] & s_Truths6[1] & (s_Truths6[2] ^ s_Truths6[4])) | (~s_Truths6[0] & ~s_Truths6[1] & ~(s_Truths6[2] ^ s_Truths6[4])); // word t = 0x05050500f5f5f5f3; word t = 0x9ef7a8d9c7193a0f; char * p = Dau_DsdPerform( t ); @@ -710,6 +700,123 @@ char * Dau_DsdRun( word * p, int nVars ) return pBuffer; } + + + +typedef struct Dau_Dsd_t_ Dau_Dsd_t; +struct Dau_Dsd_t_ +{ + int nVarsInit; // the initial number of variables + int nVarsUsed; // the current number of variables + char pVarDefs[32][8]; // variable definitions + char pOutput[DAU_MAX_STR]; // output stream + int nPos; // writing position +}; + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dua_DsdInit( Dau_Dsd_t * p, int nVarsInit ) +{ + int i; + memset( p, 0, sizeof(Dau_Dsd_t) ); + p->nVarsInit = p->nVarsUsed = nVarsInit; + for ( i = 0; i < nVarsInit; i++ ) + p->pVarDefs[i][0] = 'a'; +} +void Dua_DsdWrite( Dau_Dsd_t * p, char * pStr ) +{ + while ( *pStr ) + p->pOutput[ p->nPos++ ] = *pStr++; +} +void Dua_DsdWriteInv( Dau_Dsd_t * p, int Cond ) +{ + if ( Cond ) + p->pOutput[ p->nPos++ ] = '!'; +} +void Dua_DsdWriteVar( Dau_Dsd_t * p, int iVar ) +{ + char * pStr; + for ( pStr = p->pVarDefs[iVar]; *pStr; pStr++ ) + if ( *pStr >= 'a' + p->nVarsInit && *pStr < 'a' + p->nVarsUsed ) + Dua_DsdWriteVar( p, *pStr - 'a' ); + else + p->pOutput[ p->nPos++ ] = *pStr; +} +void Dua_DsdWriteStop( Dau_Dsd_t * p ) +{ + p->pOutput[ p->nPos++ ] = 0; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Dua_DsdMinBase( word t, int nVars, int * pVarsNew ) +{ + int v, nVarsNew = 0; + for ( v = 0; v < nVars; v++ ) + if ( Abc_Tt6HasVar( t, v ) ) + pVarsNew[nVarsNew++] = v; + return nVarsNew; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Dau_DsdDecomposeInternal( Dau_Dsd_t * p, word t, int * pVars, int nVars ) +{ +} +char * Dau_DsdDecompose( word t, int nVarsInit ) +{ + Dau_Dsd_t P, * p = &P; + int nVars, pVars[6]; + Dua_DsdInit( p, nVarsInit ); + if ( t == 0 ) + Dua_DsdWrite( p, "0" ); + else if ( ~t == 0 ) + Dua_DsdWrite( p, "1" ); + else + { + nVars = Dua_DsdMinBase( t, nVarsInit, pVars ); + assert( nVars > 0 && nVars < 6 ); + if ( nVars == 1 ) + { + Dua_DsdWriteInv( p, (int)(t & 1) ); + Dua_DsdWriteVar( p, pVars[0] ); + } + else + Dau_DsdDecomposeInternal( p, t, pVars, nVars ); + } + Dua_DsdWriteStop( p ); + return p->pOutput; +} + + + //////////////////////////////////////////////////////////////////////// /// END OF FILE /// //////////////////////////////////////////////////////////////////////// |