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| author | whitequark <whitequark@whitequark.org> | 2020-06-08 17:29:08 +0000 |
|---|---|---|
| committer | whitequark <whitequark@whitequark.org> | 2020-06-08 17:29:08 +0000 |
| commit | f2d7a18756088f4167b91c5ec4735bb694f36567 (patch) | |
| tree | c06ce266bf04244616d1aa7c9abd1b39e7cf1d86 /backends/cxxrtl/cxxrtl.h | |
| parent | d5c07e5b6f5c91666867751233f5c537068a7136 (diff) | |
| download | yosys-f2d7a18756088f4167b91c5ec4735bb694f36567.tar.gz yosys-f2d7a18756088f4167b91c5ec4735bb694f36567.tar.bz2 yosys-f2d7a18756088f4167b91c5ec4735bb694f36567.zip | |
cxxrtl: emit debug information for constant wires.
Constant wires can represent a significant chunk of the design in
generic designs or after optimization. Emitting them in VCD files
significantly improves usability because gtkwave removes all traces
that are not present in the VCD file after reload, and iterative
development suffers if switching a varying signal to a constant
disrupts the workflow.
Diffstat (limited to 'backends/cxxrtl/cxxrtl.h')
| -rw-r--r-- | backends/cxxrtl/cxxrtl.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/backends/cxxrtl/cxxrtl.h b/backends/cxxrtl/cxxrtl.h index 5f74899fd..30f4667c5 100644 --- a/backends/cxxrtl/cxxrtl.h +++ b/backends/cxxrtl/cxxrtl.h @@ -742,6 +742,17 @@ struct debug_item : ::cxxrtl_object { } template<size_t Bits> + debug_item(const value<Bits> &item) { + static_assert(sizeof(item) == value<Bits>::chunks * sizeof(chunk_t), + "value<Bits> is not compatible with C layout"); + type = VALUE; + width = Bits; + depth = 1; + curr = const_cast<uint32_t*>(item.data); + next = nullptr; + } + + template<size_t Bits> debug_item(wire<Bits> &item) { static_assert(sizeof(item.curr) == value<Bits>::chunks * sizeof(chunk_t) && sizeof(item.next) == value<Bits>::chunks * sizeof(chunk_t), |