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Add part select support to vvp_vector8_t 

Need a convenient way to handle part selects of vvp_vector8_t objects.
This commit is contained in:
Stephen Williams 2008-06-03 08:52:42 -07:00
parent 782bfab29e
commit 6e5373c87e
2 changed files with 34 additions and 0 deletions
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28
vvp/vvp_net.cc
View File

@ -1840,6 +1840,34 @@ bool vvp_vector8_t::eeq(const vvp_vector8_t&that) const
return true;
}
vvp_vector8_t vvp_vector8_t::subvalue(unsigned base, unsigned wid) const
{
vvp_vector8_t tmp (wid);
unsigned idx = 0;
while (base+idx < size_) {
tmp.bits_[idx] = bits_[base+idx];
idx += 1;
}
return tmp;
}
vvp_vector8_t part_expand(const vvp_vector8_t&that, unsigned wid, unsigned off)
{
assert(off < wid);
vvp_vector8_t tmp (wid);
unsigned idx = off;
while (idx < wid && that.size_ > (idx-off)) {
tmp.bits_[idx] = that.bits_[idx-off];
idx += 1;
}
return tmp;
}
ostream& operator<<(ostream&out, const vvp_vector8_t&that)
{
out << "C8<";

6
vvp/vvp_net.h
View File

@ -542,6 +542,8 @@ extern ostream& operator<< (ostream&, vvp_scalar_t);
*/
class vvp_vector8_t {
friend vvp_vector8_t part_expand(const vvp_vector8_t&, unsigned, unsigned);
public:
explicit vvp_vector8_t(unsigned size =0);
// Make a vvp_vector8_t from a vector4 and a specified strength.
@ -554,6 +556,7 @@ class vvp_vector8_t {
unsigned size() const { return size_; }
vvp_scalar_t value(unsigned idx) const;
vvp_vector8_t subvalue(unsigned idx, unsigned size) const;
void set_bit(unsigned idx, vvp_scalar_t val);
// Test that the vectors are exactly equal
@ -576,6 +579,7 @@ extern vvp_vector8_t resistive_reduction(const vvp_vector8_t&a);
/* The reduce4 function converts a vector8 to a vector4, losing
strength information in the process. */
extern vvp_vector4_t reduce4(const vvp_vector8_t&that);
extern vvp_vector8_t part_expand(const vvp_vector8_t&a, unsigned wid, unsigned off);
/* Print a vector8 value to a stream. */
extern ostream& operator<< (ostream&, const vvp_vector8_t&);
@ -643,6 +647,8 @@ template <class T> class vvp_sub_pointer_t {
};
typedef vvp_sub_pointer_t<vvp_net_t> vvp_net_ptr_t;
template <class T> ostream& operator << (ostream&out, vvp_sub_pointer_t<T> val)
{ out << val.ptr() << "[" << val.port() << "]"; return out; }
/*
* This is the basic unit of netlist connectivity. It is a fan-in of