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Added %R select expression

This commit is contained in:
Clifford Wolf 2015-12-20 13:35:58 +01:00
parent 5e90a78466
commit ab0c44d3ed
1 changed files with 50 additions and 0 deletions
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50
passes/cmds/select.cc
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@ -180,6 +180,47 @@ static void select_op_neg(RTLIL::Design *design, RTLIL::Selection &lhs)
lhs.selected_members.swap(new_sel.selected_members);
}
static int my_xorshift32_rng() {
static uint32_t x32 = 314159265;
x32 ^= x32 << 13;
x32 ^= x32 >> 17;
x32 ^= x32 << 5;
return x32 & 0x0fffffff;
}
static void select_op_random(RTLIL::Design *design, RTLIL::Selection &lhs, int count)
{
vector<pair<IdString, IdString>> objects;
for (auto mod : design->modules())
{
if (!lhs.selected_module(mod->name))
continue;
for (auto cell : mod->cells()) {
if (lhs.selected_member(mod->name, cell->name))
objects.push_back(make_pair(mod->name, cell->name));
}
for (auto wire : mod->wires()) {
if (lhs.selected_member(mod->name, wire->name))
objects.push_back(make_pair(mod->name, wire->name));
}
}
lhs = RTLIL::Selection(false);
while (!objects.empty() && count-- > 0)
{
int idx = my_xorshift32_rng() % GetSize(objects);
lhs.selected_members[objects[idx].first].insert(objects[idx].second);
objects[idx] = objects.back();
objects.pop_back();
}
lhs.optimize(design);
}
static void select_op_submod(RTLIL::Design *design, RTLIL::Selection &lhs)
{
for (auto &mod_it : design->modules_)
@ -634,6 +675,12 @@ static void select_stmt(RTLIL::Design *design, std::string arg)
select_op_intersect(design, work_stack[work_stack.size()-2], work_stack[work_stack.size()-1]);
work_stack.pop_back();
} else
if (arg.size() >= 2 && arg[0] == '%' && arg[1] == 'R') {
if (work_stack.size() < 1)
log_cmd_error("Must have at least one element on the stack for operator %%R.\n");
int count = arg.size() > 2 ? atoi(arg.c_str() + 2) : 1;
select_op_random(design, work_stack[work_stack.size()-1], count);
} else
if (arg == "%s") {
if (work_stack.size() < 1)
log_cmd_error("Must have at least one element on the stack for operator %%s.\n");
@ -1100,6 +1147,9 @@ struct SelectPass : public Pass {
log(" %%C\n");
log(" select cells that implement selected modules\n");
log("\n");
log(" %%R[<num>]\n");
log(" select <num> random objects from top selection (default 1)\n");
log("\n");
log("Example: the following command selects all wires that are connected to a\n");
log("'GATE' input of a 'SWITCH' cell:\n");
log("\n");