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write_verilog: translate $print cells to $write tasks in always blocks.

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whitequark 2020-11-29 17:31:04 +00:00 • committed by Marcelina Kościelnicka
parent d51ecde8c2
commit 3f8eab15bb
1 changed files with 52 additions and 0 deletions
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52
backends/verilog/verilog_backend.cc
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@ -27,6 +27,7 @@
#include "kernel/sigtools.h"
#include "kernel/ff.h"
#include "kernel/mem.h"
#include "kernel/fmt.h"
#include <string>
#include <sstream>
#include <set>
@ -1753,6 +1754,57 @@ bool dump_cell_expr(std::ostream &f, std::string indent, RTLIL::Cell *cell)
return true;
}
if (cell->type == ID($print))
{
Fmt fmt = {};
fmt.parse_rtlil(cell);
std::vector<VerilogFmtArg> args = fmt.emit_verilog();
if (cell->getParam(ID::TRG_ENABLE).as_bool()) {
f << stringf("%s" "always @(", indent.c_str());
for (size_t i = 0; i < (size_t)cell->getParam(ID::TRG_WIDTH).as_int(); i++) {
if (i != 0)
f << " or ";
if (cell->getParam(ID::TRG_POLARITY)[i])
f << "posedge ";
else
f << "negedge ";
dump_sigspec(f, cell->getPort(ID::TRG)[i]);
}
f << ")\n";
} else {
f << stringf("%s" "always @*\n", indent.c_str());
}
f << stringf("%s" " if (", indent.c_str());
dump_sigspec(f, cell->getPort(ID::EN));
f << stringf(")\n");
f << stringf("%s" " $write(", indent.c_str());
bool first = true;
for (auto &arg : args) {
if (first) {
first = false;
} else {
f << ", ";
}
switch (arg.type) {
case VerilogFmtArg::STRING:
dump_const(f, RTLIL::Const(arg.str));
break;
case VerilogFmtArg::INTEGER:
f << (arg.signed_ ? "$signed(" : "$unsigned(");
dump_sigspec(f, arg.sig);
f << ")";
break;
default: log_abort();
}
}
f << stringf(");\n");
return true;
}
// FIXME: $fsm
return false;