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/**CFile****************************************************************
FileName [extraUtilMacc.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [extra]
Synopsis [Generates multiplier accumulators.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: extraUtilMacc.c,v 1.0 2003/02/01 00:00:00 alanmi Exp $]
***********************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "misc/vec/vec.h"
#include "misc/vec/vecMem.h"
#include "misc/extra/extra.h"
#include "misc/util/utilTruth.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Macc_ConstMultSpecOne2( FILE * pFile, int n, int nBits, int nWidth )
{
int nTotal = nWidth+nBits;
int Bound = 1 << (nBits-1);
assert( -Bound <= n && n < Bound );
fprintf( pFile, "// %d-bit multiplier-accumulator with constant %d generated by ABC on %s\n", nTotal, n, Extra_TimeStamp() );
fprintf( pFile, "module mulacc%03d%s (\n", Abc_AbsInt(n), n < 0 ? "_neg" : "_pos" );
fprintf( pFile, " input [%d:0] i,\n", nTotal-1 );
fprintf( pFile, " input [%d:0] s,\n", nTotal-1 );
fprintf( pFile, " output [%d:0] o\n", nTotal-1 );
fprintf( pFile, ");\n" );
fprintf( pFile, " wire [%d:0] c = %d\'h%x;\n", nTotal-1, nTotal, Abc_AbsInt(n) );
fprintf( pFile, " wire [%d:0] m = i * c;\n", nTotal-1 );
fprintf( pFile, " assign o = s %c m;\n", n < 0 ? '-' : '+' );
fprintf( pFile, "endmodule\n\n" );
}
void Macc_ConstMultSpecOne( FILE * pFile, int n, int nBits, int nWidth )
{
int nTotal = nWidth+nBits;
int Bound = 1 << (nBits-1);
assert( -Bound <= n && n < Bound );
fprintf( pFile, "// %d-bit multiplier by %d-bit constant %d generated by ABC\n", nWidth, nBits, n );
fprintf( pFile, "module mul%03d%s (\n", Abc_AbsInt(n), n < 0 ? "_neg" : "_pos" );
fprintf( pFile, " input [%d:0] i,\n", nWidth-1 );
fprintf( pFile, " output [%d:0] o\n", nWidth-1 );
fprintf( pFile, ");\n" );
fprintf( pFile, " wire [%d:0] c = %d\'h%x;\n", nBits-1, nBits, Abc_AbsInt(n) );
fprintf( pFile, " wire [%d:0] I = {{%d{i[%d]}}, i};\n", nTotal-1, nBits, nWidth-1 );
fprintf( pFile, " wire [%d:0] m = I * c;\n", nTotal-1 );
fprintf( pFile, " wire [%d:0] t = %cm;\n", nTotal-1, n < 0 ? '-' : ' ' );
fprintf( pFile, " assign o = t[%d:%d];\n", nTotal-1, nBits );
fprintf( pFile, "endmodule\n\n" );
}
void Macc_ConstMultSpecTest()
{
int nBits = 8;
int nWidth = 16;
int Bound = 1 << (nBits-1);
int i;
char Buffer[100];
FILE * pFile;
for ( i = -Bound; i < Bound; i++ )
{
sprintf( Buffer, "const_mul//macc_spec_%03d.v", 0xFF & i );
pFile = fopen( Buffer, "wb" );
Macc_ConstMultSpecOne2( pFile, i, nBits, nWidth );
fclose( pFile );
}
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
unsigned * Macc_ConstMultGenerate( int nBits )
{
unsigned Mask = Abc_InfoMask( nBits );
Vec_Wec_t * vDivs = Vec_WecStart( 2*nBits );
Vec_Int_t * vOne, * vTwo, * vThree;
unsigned * pPlace = ABC_CALLOC( unsigned, (1 << nBits) );
int n, a, b, One, Two, i, k, New, Bound = 1 << (nBits-1);
// skip trivial
pPlace[0] = ~0;
pPlace[1] = ~0;
pPlace[Mask & (-1)] = ~0;
// skip div by 2
for ( i = 2; i < (1 << nBits); i++ )
if ( (i & 1) == 0 )
pPlace[i] = ~0;
// collect trivial
printf( "Generating numbers using %d adders:\n", 0 );
for ( i = 0; i < nBits; i++ )
{
Vec_WecPush( vDivs, 0, 1<<i );
printf( "%d = %d << %d\n", 1<<i, 1, i );
}
// generate for each adder count
for ( n = 1; n < nBits; n++ )
{
// quit if all of them are finished
for ( a = 1; a < (1 << nBits); a++ )
if ( pPlace[a] == 0 )
break;
if ( a == (1 << nBits) )
break;
printf( "Generating numbers using %d adders:\n", n );
vThree = Vec_WecEntry( vDivs, n );
for ( a = 0; a < nBits; a++ )
for ( b = 0; b < nBits; b++ )
{
if ( a + b != n-1 )
continue;
vOne = Vec_WecEntry( vDivs, a );
vTwo = Vec_WecEntry( vDivs, b );
Vec_IntForEachEntry( vOne, One, i )
Vec_IntForEachEntry( vTwo, Two, k )
{
New = One + Two;
if ( New >= -Bound && New < Bound && pPlace[Mask & New] == 0 )
{
if ( New > 0 )
Vec_IntPush( vThree, New );
pPlace[Mask & New] = (One << 16) | Two;
printf( "%d = %d + %d\n", New, One, Two );
}
New = One - Two;
if ( New >= -Bound && New < Bound && pPlace[Mask & New] == 0 )
{
if ( New > 0 )
Vec_IntPush( vThree, New );
pPlace[Mask & New] = (One << 16) | Two | (1 << 15);
printf( "%d = %d - %d\n", New, One, Two );
}
New = Two - One;
if ( New >= -Bound && New < Bound && pPlace[Mask & New] == 0 )
{
if ( New > 0 )
Vec_IntPush( vThree, New );
pPlace[Mask & New] = (Two << 16) | One | (1 << 15);
printf( "%d = %d - %d\n", New, Two, One );
}
}
printf( "Adding one incrementor:\n" );
Vec_IntForEachEntry( vThree, One, i )
{
if ( One < 0 )
continue;
New = -One;
if ( pPlace[Mask & New] == 0 )
{
pPlace[Mask & New] = One << 16;
printf( "-%d = ~%d + 1\n", One, One );
}
}
}
}
Vec_WecPrint( vDivs, 0 );
Vec_WecFree( vDivs );
//ABC_FREE( pPlace );
return pPlace;
}
void Macc_ConstMultGenTest0()
{
int nBits = 8;
unsigned * p = Macc_ConstMultGenerate( nBits );
ABC_FREE( p );
}
void Macc_ConstMultGenOne_rec( FILE * pFile, unsigned * p, int n, int nBits, int nWidth )
{
unsigned Mask = Abc_InfoMask( nBits );
unsigned New = Mask & (unsigned)n;
int nTotal = nWidth+nBits;
int One = p[New] >> 16;
int Two = p[New] & 0x7FFF;
char Sign = n < 0 ? 'N' : 'n';
char Oper = ((p[New] >> 15) & 1) ? '-' : '+';
if ( p[New] == ~0 )
{
// count trailing zeros
int nn, nZeros;
for ( nZeros = 0; nZeros < nBits; nZeros++ )
if ( (n >> nZeros) & 1 )
break;
nn = n >> nZeros;
if ( nn == -1 )
fprintf( pFile, " wire [%d:0] N1 = -n1;\n", nTotal-1 );
if ( Abc_AbsInt(nn) != 1 )
Macc_ConstMultGenOne_rec( pFile, p, nn, nBits, nWidth );
if ( nZeros > 0 )
fprintf( pFile, " wire [%d:0] %c%d = %c%d << %d;\n", nTotal-1, Sign, Abc_AbsInt(n), Sign, Abc_AbsInt(nn), nZeros );
}
else if ( One && Two ) // add/sub
{
Macc_ConstMultGenOne_rec( pFile, p, One, nBits, nWidth );
Macc_ConstMultGenOne_rec( pFile, p, Two, nBits, nWidth );
fprintf( pFile, " wire [%d:0] %c%d = n%d %c n%d;\n", nTotal-1, Sign, Abc_AbsInt(n), One, Oper, Two );
}
else if ( Two == 0 ) // minus
{
Macc_ConstMultGenOne_rec( pFile, p, One, nBits, nWidth );
fprintf( pFile, " wire [%d:0] N%d = -n%d;\n", nTotal-1, One, One );
}
}
void Macc_ConstMultGenMult( FILE * pFile, unsigned * p, int n, int nBits, int nWidth )
{
int nTotal = nWidth+nBits;
int Bound = 1 << (nBits-1);
char Sign = n < 0 ? 'N' : 'n';
assert( -Bound <= n && n < Bound );
fprintf( pFile, "// %d-bit multiplier by %d-bit constant %d generated by ABC\n", nWidth, nBits, n );
fprintf( pFile, "module mul%03d%s (\n", Abc_AbsInt(n), n < 0 ? "_neg" : "_pos" );
fprintf( pFile, " input [%d:0] i,\n", nWidth-1 );
fprintf( pFile, " output [%d:0] o\n", nWidth-1 );
fprintf( pFile, ");\n" );
if ( n == 0 )
fprintf( pFile, " assign o = %d\'h0;\n", nWidth );
else
{
fprintf( pFile, " wire [%d:0] n1 = {{%d{i[%d]}}, i};\n", nTotal-1, nBits, nWidth-1 );
Macc_ConstMultGenOne_rec( pFile, p, n, nBits, nWidth );
fprintf( pFile, " assign o = %c%d[%d:%d];\n", Sign, Abc_AbsInt(n), nTotal-1, nBits );
}
fprintf( pFile, "endmodule\n\n" );
}
void Macc_ConstMultGenMacc( FILE * pFile, unsigned * p, int n, int nBits, int nWidth )
{
int nTotal = nWidth+nBits;
int Bound = 1 << (nBits-1);
char Sign = n < 0 ? 'N' : 'n';
assert( -Bound <= n && n < Bound );
fprintf( pFile, "// %d-bit multiplier-accumulator by %d-bit constant %d generated by ABC\n", nWidth, nBits, n );
fprintf( pFile, "module macc%03d%s (\n", Abc_AbsInt(n), n < 0 ? "_neg" : "_pos" );
fprintf( pFile, " input [%d:0] i,\n", nWidth-1 );
fprintf( pFile, " input [%d:0] c,\n", nWidth-1 );
fprintf( pFile, " output [%d:0] o\n", nWidth-1 );
fprintf( pFile, ");\n" );
if ( n == 0 )
fprintf( pFile, " assign o = c;\n" );
else
{
fprintf( pFile, " wire [%d:0] n1 = {{%d{i[%d]}}, i};\n", nTotal-1, nBits, nWidth-1 );
Macc_ConstMultGenOne_rec( pFile, p, n, nBits, nWidth );
fprintf( pFile, " wire [%d:0] s = %c%d[%d:%d];\n", nWidth-1, Sign, Abc_AbsInt(n), nTotal-1, nBits );
fprintf( pFile, " assign o = s + c;\n" );
}
fprintf( pFile, "endmodule\n\n" );
}
void Macc_ConstMultGenMacc2( FILE * pFile, unsigned * p, int n, int nBits, int nWidth )
{
int nTotal = nWidth+nBits;
int Bound = 1 << (nBits-1);
char Sign = n < 0 ? 'N' : 'n';
assert( -Bound <= n && n < Bound );
fprintf( pFile, "// %d-bit multiplier-accumulator by constant %d generated by ABC on %s\n", nTotal, n, Extra_TimeStamp() );
fprintf( pFile, "module macc%03d%s (\n", Abc_AbsInt(n), n < 0 ? "_neg" : "_pos" );
fprintf( pFile, " input [%d:0] i,\n", nTotal-1 );
fprintf( pFile, " input [%d:0] s,\n", nTotal-1 );
fprintf( pFile, " output [%d:0] o\n", nTotal-1 );
fprintf( pFile, ");\n" );
if ( n == 0 )
fprintf( pFile, " assign o = s;\n" );
else
{
fprintf( pFile, " wire [%d:0] n1 = i;\n", nTotal-1 );
Macc_ConstMultGenOne_rec( pFile, p, n, nBits, nWidth );
fprintf( pFile, " assign o = s + %c%d;\n", Sign, Abc_AbsInt(n) );
}
fprintf( pFile, "endmodule\n\n" );
}
void Macc_ConstMultGenTest()
{
int nBits = 8;
int nWidth = 16;
int Bound = 1 << (nBits-1);
unsigned * p = Macc_ConstMultGenerate( nBits );
int i;
char Buffer[100];
FILE * pFile;
for ( i = -Bound; i < Bound; i++ )
{
sprintf( Buffer, "const_mul//macc%03d.v", 0xFF & i );
pFile = fopen( Buffer, "wb" );
Macc_ConstMultGenMacc2( pFile, p, i, nBits, nWidth );
fclose( pFile );
}
ABC_FREE( p );
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
|
