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Ensure \A_SIGNED is never used with $shiftx 

It has no effect on the output ($shiftx doesn't perform any sign
extension whatsoever), so an attempt to use it should be caught early.
This commit is contained in:
Xiretza 2020-07-03 13:13:21 +02:00 committed by Marcelina Kościelnicka
parent 928fd40c2e
commit 916028906a
2 changed files with 9 additions and 1 deletions
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6
kernel/rtlil.cc
View File

@ -1035,7 +1035,11 @@ namespace {
}
if (cell->type.in(ID($shift), ID($shiftx))) {
param_bool(ID::A_SIGNED);
if (cell->type == ID($shiftx)) {
param_bool(ID::A_SIGNED, /*expected=*/false);
} else {
param_bool(ID::A_SIGNED);
}
param_bool(ID::B_SIGNED);
port(ID::A, param(ID::A_WIDTH));
port(ID::B, param(ID::B_WIDTH));

4
passes/tests/test_cell.cc
View File

@ -264,6 +264,10 @@ static void create_gold_module(RTLIL::Design *design, RTLIL::IdString cell_type,
cell->setPort(ID::Y, wire);
}
if (cell_type.in(ID($shiftx))) {
cell->parameters[ID::A_SIGNED] = false;
}
if (cell_type.in(ID($shl), ID($shr), ID($sshl), ID($sshr))) {
cell->parameters[ID::B_SIGNED] = false;
}