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nor2 and and2 optimized gates.

This commit is contained in:
steve 2000-03-17 19:23:59 +00:00
parent 51e96a2d8b
commit e71413123e
3 changed files with 114 additions and 6 deletions
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15
t-vvm.cc
View File

@ -17,7 +17,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#if !defined(WINNT) && !defined(macintosh)
#ident "$Id: t-vvm.cc,v 1.113 2000/03/17 17:25:53 steve Exp $"
#ident "$Id: t-vvm.cc,v 1.114 2000/03/17 19:23:59 steve Exp $"
#endif
# include <iostream>
@ -1256,7 +1256,10 @@ void target_vvm::logic(ostream&os, const NetLogic*gate)
switch (gate->type()) {
case NetLogic::AND:
os << "static vvm_and" << "<" << gate->pin_count()-1 << "> ";
if ((gate->pin_count()-1) == 2)
os << "static vvm_and2 ";
else
os << "static vvm_and" << "<" << gate->pin_count()-1 << "> ";
break;
case NetLogic::BUF:
os << "static vvm_buf ";
@ -1271,7 +1274,10 @@ void target_vvm::logic(ostream&os, const NetLogic*gate)
os << "static vvm_nand" << "<" << gate->pin_count()-1 << "> ";
break;
case NetLogic::NOR:
os << "static vvm_nor" << "<" << gate->pin_count()-1 << "> ";
if ((gate->pin_count()-1) == 2)
os << "static vvm_nor2 ";
else
os << "static vvm_nor" << "<" << gate->pin_count()-1 << "> ";
break;
case NetLogic::NOT:
os << "static vvm_not ";
@ -2239,6 +2245,9 @@ extern const struct target tgt_vvm = {
};
/*
* $Log: t-vvm.cc,v $
* Revision 1.114 2000/03/17 19:23:59 steve
* nor2 and and2 optimized gates.
*
* Revision 1.113 2000/03/17 17:25:53 steve
* Adder and comparator in nexus style.
*

64
vvm/vvm_gates.cc
View File

@ -17,7 +17,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#if !defined(WINNT) && !defined(macintosh)
#ident "$Id: vvm_gates.cc,v 1.8 2000/03/17 03:36:07 steve Exp $"
#ident "$Id: vvm_gates.cc,v 1.9 2000/03/17 19:24:00 steve Exp $"
#endif
# include "vvm_gates.h"
@ -134,6 +134,36 @@ void compute_mux(vpip_bit_t*out, unsigned wid,
}
}
vvm_and2::vvm_and2(unsigned long d)
: vvm_1bit_out(d)
{
}
vvm_and2::~vvm_and2()
{
}
void vvm_and2::init_I(unsigned idx, vpip_bit_t val)
{
assert(idx < 2);
input_[idx] = val;
}
void vvm_and2::start()
{
output(input_[0] & input_[1]);
}
void vvm_and2::take_value(unsigned key, vpip_bit_t val)
{
if (input_[key] == val)
return;
input_[key] = val;
output(input_[0] & input_[1]);
}
vvm_buf::vvm_buf(unsigned long d)
: vvm_1bit_out(d)
{
@ -214,6 +244,35 @@ vpip_bit_t vvm_eeq::compute_() const
return outval;
}
vvm_nor2::vvm_nor2(unsigned long d)
: vvm_1bit_out(d)
{
}
vvm_nor2::~vvm_nor2()
{
}
void vvm_nor2::init_I(unsigned idx, vpip_bit_t val)
{
assert(idx < 2);
input_[idx] = val;
}
void vvm_nor2::start()
{
output(v_not(input_[0] | input_[1]));
}
void vvm_nor2::take_value(unsigned key, vpip_bit_t val)
{
if (input_[key] == val)
return;
input_[key] = val;
output(v_not(input_[0] | input_[1]));
}
vvm_not::vvm_not(unsigned long d)
: vvm_1bit_out(d)
{
@ -239,6 +298,9 @@ void vvm_not::take_value(unsigned, vpip_bit_t val)
/*
* $Log: vvm_gates.cc,v $
* Revision 1.9 2000/03/17 19:24:00 steve
* nor2 and and2 optimized gates.
*
* Revision 1.8 2000/03/17 03:36:07 steve
* Remove some useless template parameters.
*

41
vvm/vvm_gates.h
View File

@ -19,7 +19,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#if !defined(WINNT) && !defined(macintosh)
#ident "$Id: vvm_gates.h,v 1.44 2000/03/17 17:25:53 steve Exp $"
#ident "$Id: vvm_gates.h,v 1.45 2000/03/17 19:24:00 steve Exp $"
#endif
# include "vvm.h"
@ -119,7 +119,12 @@ class vvm_add_sub : public vvm_nexus::recvr_t {
vvm_add_sub& operator= (const vvm_add_sub&);
};
/*
* These are implementations of reduction AND. the vvm_and class is
* the parameterized form, that takes the width of the gate input as a
* parameter. The vvm_andN classes are versions that have specific
* widths. The latter should be preferred over the generic form.
*/
template <unsigned WIDTH>
class vvm_and : public vvm_1bit_out, public vvm_nexus::recvr_t {
@ -146,6 +151,21 @@ class vvm_and : public vvm_1bit_out, public vvm_nexus::recvr_t {
vpip_bit_t input_[WIDTH];
};
class vvm_and2 : public vvm_1bit_out, public vvm_nexus::recvr_t {
public:
explicit vvm_and2(unsigned long d);
~vvm_and2();
void init_I(unsigned idx, vpip_bit_t val);
void start();
private:
void take_value(unsigned key, vpip_bit_t val);
vpip_bit_t input_[2];
};
/*
* This class implements LPM_CLSHIFT devices with specified data width
* and selector input width. The direction bit is a single bit input.
@ -427,6 +447,20 @@ class vvm_nor : public vvm_1bit_out, public vvm_nexus::recvr_t {
vpip_bit_t input_[WIDTH];
};
class vvm_nor2 : public vvm_1bit_out, public vvm_nexus::recvr_t {
public:
explicit vvm_nor2(unsigned long d);
~vvm_nor2();
void init_I(unsigned idx, vpip_bit_t val);
void start();
private:
void take_value(unsigned key, vpip_bit_t val);
vpip_bit_t input_[2];
};
/*
* This object implements a LPM_RAM_DQ device, except for the actual
* contents of the memory, which are stored in a vvm_memory_t
@ -814,6 +848,9 @@ template <unsigned WIDTH> class vvm_pevent : public vvm_nexus::recvr_t {
/*
* $Log: vvm_gates.h,v $
* Revision 1.45 2000/03/17 19:24:00 steve
* nor2 and and2 optimized gates.
*
* Revision 1.44 2000/03/17 17:25:53 steve
* Adder and comparator in nexus style.
*