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Add SigChunk::offset_in_sigspec

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This commit is contained in:
Robert O'Callahan 2025-10-08 22:49:46 +00:00
parent 37875fdedf
commit acee6db361
2 changed files with 49 additions and 15 deletions
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63
kernel/rtlil.cc
View file

@ -4467,6 +4467,7 @@ RTLIL::SigSpec::SigSpec(const RTLIL::Const &value)
if (GetSize(value) != 0) {
chunks_.emplace_back(value);
chunks_.back().offset_in_sigspec = 0;
width_ = chunks_.back().width;
} else {
width_ = 0;
@ -4481,6 +4482,7 @@ RTLIL::SigSpec::SigSpec(RTLIL::Const &&value)
if (GetSize(value) != 0) {
chunks_.emplace_back(std::move(value));
chunks_.back().offset_in_sigspec = 0;
width_ = chunks_.back().width;
} else {
width_ = 0;
@ -4495,6 +4497,7 @@ RTLIL::SigSpec::SigSpec(const RTLIL::SigChunk &chunk)
if (chunk.width != 0) {
chunks_.emplace_back(chunk);
chunks_.back().offset_in_sigspec = 0;
width_ = chunks_.back().width;
} else {
width_ = 0;
@ -4509,6 +4512,7 @@ RTLIL::SigSpec::SigSpec(RTLIL::SigChunk &&chunk)
if (chunk.width != 0) {
chunks_.emplace_back(std::move(chunk));
chunks_.back().offset_in_sigspec = 0;
width_ = chunks_.back().width;
} else {
width_ = 0;
@ -4523,6 +4527,7 @@ RTLIL::SigSpec::SigSpec(RTLIL::Wire *wire)
if (wire->width != 0) {
chunks_.emplace_back(wire);
chunks_.back().offset_in_sigspec = 0;
width_ = chunks_.back().width;
} else {
width_ = 0;
@ -4537,6 +4542,7 @@ RTLIL::SigSpec::SigSpec(RTLIL::Wire *wire, int offset, int width)
if (width != 0) {
chunks_.emplace_back(wire, offset, width);
chunks_.back().offset_in_sigspec = 0;
width_ = chunks_.back().width;
} else {
width_ = 0;
@ -4551,6 +4557,7 @@ RTLIL::SigSpec::SigSpec(const std::string &str)
if (str.size() != 0) {
chunks_.emplace_back(str);
chunks_.back().offset_in_sigspec = 0;
width_ = chunks_.back().width;
} else {
width_ = 0;
@ -4563,8 +4570,10 @@ RTLIL::SigSpec::SigSpec(int val, int width)
{
cover("kernel.rtlil.sigspec.init.int");
if (width != 0)
if (width != 0) {
chunks_.emplace_back(val, width);
chunks_.back().offset_in_sigspec = 0;
}
width_ = width;
hash_ = 0;
check();
@ -4574,8 +4583,10 @@ RTLIL::SigSpec::SigSpec(RTLIL::State bit, int width)
{
cover("kernel.rtlil.sigspec.init.state");
if (width != 0)
if (width != 0) {
chunks_.emplace_back(bit, width);
chunks_.back().offset_in_sigspec = 0;
}
width_ = width;
hash_ = 0;
check();
@ -4586,11 +4597,15 @@ RTLIL::SigSpec::SigSpec(const RTLIL::SigBit &bit, int width)
cover("kernel.rtlil.sigspec.init.bit");
if (width != 0) {
if (bit.wire == NULL)
if (bit.wire == NULL) {
chunks_.emplace_back(bit.data, width);
else
for (int i = 0; i < width; i++)
chunks_.back().offset_in_sigspec = 0;
} else {
for (int i = 0; i < width; i++) {
chunks_.push_back(bit);
chunks_.back().offset_in_sigspec = i;
}
}
}
width_ = width;
hash_ = 0;
@ -4667,7 +4682,8 @@ void RTLIL::SigSpec::pack() const
RTLIL::SigChunk *last = NULL;
int last_end_offset = 0;
for (auto &bit : old_bits) {
for (int i = 0; i < GetSize(old_bits); ++i) {
const RTLIL::SigBit &bit = old_bits[i];
if (last && bit.wire == last->wire) {
if (bit.wire == NULL) {
last->data.push_back(bit.data);
@ -4680,6 +4696,7 @@ void RTLIL::SigSpec::pack() const
}
}
that->chunks_.push_back(bit);
that->chunks_.back().offset_in_sigspec = i;
last = &that->chunks_.back();
last_end_offset = bit.offset + 1;
}
@ -5074,6 +5091,7 @@ void RTLIL::SigSpec::remove_const()
new_chunks.back().width += chunk.width;
} else {
new_chunks.push_back(chunk);
new_chunks.back().offset_in_sigspec = width_;
}
width_ += chunk.width;
}
@ -5127,10 +5145,13 @@ RTLIL::SigSpec RTLIL::SigSpec::extract(int offset, int length) const
extracted.width_ = length;
auto it = chunks_.begin();
int offset_in_extracted = 0;
for (; offset; offset -= it->width, it++) {
if (offset < it->width) {
int chunk_length = min(it->width - offset, length);
extracted.chunks_.emplace_back(it->extract(offset, chunk_length));
extracted.chunks_.back().offset_in_sigspec = 0;
offset_in_extracted = chunk_length;
length -= chunk_length;
it++;
break;
@ -5139,8 +5160,11 @@ RTLIL::SigSpec RTLIL::SigSpec::extract(int offset, int length) const
for (; length; length -= it->width, it++) {
if (length >= it->width) {
extracted.chunks_.emplace_back(*it);
extracted.chunks_.back().offset_in_sigspec = offset_in_extracted;
offset_in_extracted += it->width;
} else {
extracted.chunks_.emplace_back(it->extract(0, length));
extracted.chunks_.back().offset_in_sigspec = offset_in_extracted;
break;
}
}
@ -5168,7 +5192,8 @@ void RTLIL::SigSpec::append(const RTLIL::SigSpec &signal)
signal.pack();
}
if (packed())
if (packed()) {
int offset_in_sigspec = width_;
for (auto &other_c : signal.chunks_)
{
auto &my_last_c = chunks_.back();
@ -5177,13 +5202,15 @@ void RTLIL::SigSpec::append(const RTLIL::SigSpec &signal)
auto &other_data = other_c.data;
this_data.insert(this_data.end(), other_data.begin(), other_data.end());
my_last_c.width += other_c.width;
} else
if (my_last_c.wire == other_c.wire && my_last_c.offset + my_last_c.width == other_c.offset) {
} else if (my_last_c.wire == other_c.wire && my_last_c.offset + my_last_c.width == other_c.offset) {
my_last_c.width += other_c.width;
} else
} else {
chunks_.push_back(other_c);
chunks_.back().offset_in_sigspec = offset_in_sigspec;
}
offset_in_sigspec += other_c.width;
}
else
} else
bits_.insert(bits_.end(), signal.bits_.begin(), signal.bits_.end());
width_ += signal.width_;
@ -5196,20 +5223,25 @@ void RTLIL::SigSpec::append(const RTLIL::SigBit &bit)
{
cover("kernel.rtlil.sigspec.append_bit.packed");
if (chunks_.size() == 0)
if (chunks_.size() == 0) {
chunks_.push_back(bit);
else
chunks_.back().offset_in_sigspec = 0;
} else
if (bit.wire == NULL)
if (chunks_.back().wire == NULL) {
chunks_.back().data.push_back(bit.data);
chunks_.back().width++;
} else
} else {
chunks_.push_back(bit);
chunks_.back().offset_in_sigspec = width_;
}
else
if (chunks_.back().wire == bit.wire && chunks_.back().offset + chunks_.back().width == bit.offset)
chunks_.back().width++;
else
else {
chunks_.push_back(bit);
chunks_.back().offset_in_sigspec = width_;
}
}
else
{
@ -5265,6 +5297,7 @@ void RTLIL::SigSpec::check(Module *mod) const
for (size_t i = 0; i < chunks_.size(); i++) {
const RTLIL::SigChunk &chunk = chunks_[i];
log_assert(chunk.width != 0);
log_assert(chunk.offset_in_sigspec == w);
if (chunk.wire == NULL) {
if (i > 0)
log_assert(chunks_[i-1].wire != NULL);

1
kernel/rtlil.h
View file

@ -1131,6 +1131,7 @@ struct RTLIL::SigChunk
RTLIL::Wire *wire;
std::vector<RTLIL::State> data; // only used if wire == NULL, LSB at index 0
int width, offset;
int offset_in_sigspec = -1;
SigChunk() : wire(nullptr), width(0), offset(0) {}
SigChunk(const RTLIL::Const &value) : wire(nullptr), data(value.to_bits()), width(GetSize(data)), offset(0) {}