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workaround for bram issue

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Andrew Lenharth 2023-02-23 11:43:20 -06:00
parent 4fde94d2bf
commit c1f3e52f50
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docs/ToolsWorkarounds.md
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@ -67,3 +67,14 @@ Qux:
m.w.mask <= w.mask
```
Compile with either firtool -repl-seq-mem -repl-seq-mem-file=mem.conf Foo.fir and firrtl -i Foo.fir.
## Workaround
FIRRTL memory lowering has a flag to generate attributes on memory
implementations that preserve the behavior described in the verilog. This is
not a general solution, this bug could impact anyone making memory-looking
things. It was decided not to try to reverse engineer the conditions which
cause the bug to manifest (since they are version dependent), thus there isn't
a universal fix that can be applied in the generated verilog.
https://github.com/llvm/circt/commit/e9f443be475e0ef796c0c6af1ce09d6e783fcd5a