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Made changes recommended by Clifford Wolf ... 

Removed bit_check_equal(), used RTLIL::SigBit for individual bits, used
dict<> instead of std::map, and used RTLIL::SigSpec instead of
std::vector.
This commit is contained in:
luke whittlesey 2015-05-10 11:33:24 -04:00
parent 2c1e150297
commit 6de8fea2c7
1 changed files with 11 additions and 22 deletions
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33
backends/verilog/verilog_backend.cc
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@ -153,17 +153,6 @@ bool is_reg_wire(RTLIL::SigSpec sig, std::string &reg_name)
return true;
}
bool bit_check_equal(SigMap &sigmap, RTLIL::SigSpec &a, RTLIL::SigSpec &b)
{
if (a.is_fully_const() && b.is_fully_const()){
return (a.as_bool() == b.as_bool());
}else if (!a.is_fully_const() && !b.is_fully_const()){
return (sigmap(a) == sigmap(b));
}else{
return false;
}
}
void dump_const(std::ostream &f, const RTLIL::Const &data, int width = -1, int offset = 0, bool no_decimal = false, bool set_signed = false, bool escape_comment = false)
{
if (width < 0)
@ -892,10 +881,11 @@ bool dump_cell_expr(std::ostream &f, std::string indent, RTLIL::Cell *cell)
}
int nwrite_ports = cell->parameters["\\WR_PORTS"].as_int();
RTLIL::SigSpec sig_wr_clk, sig_wr_data, sig_wr_addr, sig_wr_en, sig_wr_en_bit, last_bit, current_bit;
bool wr_clk_posedge; //, use_wen; //, use_individual_wen_bits;
std::vector<RTLIL::SigSpec> lof_wen;
std::map<RTLIL::SigSpec, int> wen_to_width;
RTLIL::SigSpec sig_wr_clk, sig_wr_data, sig_wr_addr, sig_wr_en, sig_wr_en_bit;
RTLIL::SigBit last_bit, current_bit;
bool wr_clk_posedge;
RTLIL::SigSpec lof_wen;
dict<RTLIL::SigSpec, int> wen_to_width;
SigMap sigmap(active_module);
int n, wen_width;
// write ports
@ -913,15 +903,15 @@ bool dump_cell_expr(std::ostream &f, std::string indent, RTLIL::Cell *cell)
wr_clk_posedge = cell->parameters["\\WR_CLK_POLARITY"].extract(i).as_bool();
// group the wen bits
last_bit = sig_wr_en.extract(0);
lof_wen.push_back(last_bit);
lof_wen.append_bit(last_bit);
wen_to_width[last_bit] = 0;
for(int j=0; j<width; j++)
{
current_bit = sig_wr_en.extract(j);
if ( bit_check_equal(sigmap, current_bit, last_bit) ){
wen_to_width[lof_wen.back()] += 1;
if ( sigmap(current_bit) == sigmap(last_bit) ){
wen_to_width[current_bit] += 1;
}else{
lof_wen.push_back(current_bit);
lof_wen.append_bit(current_bit);
wen_to_width[current_bit] = 1;
}
last_bit = current_bit;
@ -934,13 +924,12 @@ bool dump_cell_expr(std::ostream &f, std::string indent, RTLIL::Cell *cell)
n = 0;
for (auto &wen_bit : lof_wen) {
wen_width = wen_to_width[wen_bit];
if (!wen_bit.is_fully_zero())
if ( !(wen_bit == RTLIL::SigBit(false)) )
{
f << stringf("%s" "always @(%sedge ", indent.c_str(), wr_clk_posedge ? "pos" : "neg");
dump_sigspec(f, sig_wr_clk);
f << stringf(")\n");
//if (wen_bit.is_wire()) // why doesn't wen_bit.is_wire() work here?
if (!wen_bit.has_const())
if ( !(wen_bit == RTLIL::SigBit(true)) )
{
f << stringf("%s" " if (", indent.c_str());
dump_sigspec(f, wen_bit);