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Add abc9_ops -prep_dff

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This commit is contained in:
Eddie Hung 2019-12-30 16:36:33 -08:00
parent 88b9c8d46d
commit 16c4ec7eda
3 changed files with 50 additions and 39 deletions
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46
passes/techmap/abc9_ops.cc
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@ -19,6 +19,7 @@
*/
#include "kernel/register.h"
#include "kernel/sigtools.h"
USING_YOSYS_NAMESPACE
PRIVATE_NAMESPACE_BEGIN
@ -95,6 +96,44 @@ void unbreak_scc(RTLIL::Module *module) {
module->fixup_ports();
}
void prep_dff(RTLIL::Module *module) {
auto design = module->design;
log_assert(design);
SigMap assign_map(module);
typedef SigSpec clkdomain_t;
dict<clkdomain_t, int> clk_to_mergeability;
for (auto cell : module->selected_cells()) {
auto inst_module = design->module(cell->type);
if (!inst_module || !inst_module->attributes.count("\\abc9_flop")
|| cell->get_bool_attribute("\\abc9_keep"))
continue;
Wire *abc9_clock_wire = module->wire(stringf("%s.$abc9_clock", cell->name.c_str()));
if (abc9_clock_wire == NULL)
log_error("'%s$abc9_clock' is not a wire present in module '%s'.\n", cell->name.c_str(), log_id(module));
SigSpec abc9_clock = assign_map(abc9_clock_wire);
clkdomain_t key(abc9_clock);
auto r = clk_to_mergeability.insert(std::make_pair(abc9_clock, clk_to_mergeability.size() + 1));
auto r2 YS_ATTRIBUTE(unused) = cell->attributes.insert(std::make_pair(ID(abc9_mergeability), r.first->second));
log_assert(r2.second);
Wire *abc9_init_wire = module->wire(stringf("%s.$abc9_init", cell->name.c_str()));
if (abc9_init_wire == NULL)
log_error("'%s.$abc9_init' is not a wire present in module '%s'.\n", cell->name.c_str(), log_id(module));
log_assert(GetSize(abc9_init_wire) == 1);
SigSpec abc9_init = assign_map(abc9_init_wire);
if (!abc9_init.is_fully_const())
log_error("'%s.$abc9_init' is not a constant wire present in module '%s'.\n", cell->name.c_str(), log_id(module));
r2 = cell->attributes.insert(std::make_pair(ID(abc9_init), abc9_init.as_const()));
log_assert(r2.second);
}
}
struct Abc9PrepPass : public Pass {
Abc9PrepPass() : Pass("abc9_ops", "helper functions for ABC9") { }
void help() YS_OVERRIDE
@ -111,6 +150,7 @@ struct Abc9PrepPass : public Pass {
bool break_scc_mode = false;
bool unbreak_scc_mode = false;
bool prep_dff_mode = false;
size_t argidx;
for (argidx = 1; argidx < args.size(); argidx++) {
@ -123,6 +163,10 @@ struct Abc9PrepPass : public Pass {
unbreak_scc_mode = true;
continue;
}
if (arg == "-prep_dff") {
prep_dff_mode = true;
continue;
}
break;
}
extra_args(args, argidx, design);
@ -132,6 +176,8 @@ struct Abc9PrepPass : public Pass {
break_scc(mod);
if (unbreak_scc_mode)
unbreak_scc(mod);
if (prep_dff_mode)
prep_dff(mod);
}
}
} Abc9PrepPass;