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| author | Clifford Wolf <clifford@clifford.at> | 2019-08-15 23:02:37 +0200 |
|---|---|---|
| committer | Clifford Wolf <clifford@clifford.at> | 2019-08-15 23:02:37 +0200 |
| commit | 016036f247f9538016f4e8cbdb889ac631f4a5c0 (patch) | |
| tree | 8920f798df8b3c115847cba11ba1702bd42b3911 | |
| parent | 969ab9027a8c4ee831e39f193f7ecb68457152c3 (diff) | |
| download | yosys-016036f247f9538016f4e8cbdb889ac631f4a5c0.tar.gz yosys-016036f247f9538016f4e8cbdb889ac631f4a5c0.tar.bz2 yosys-016036f247f9538016f4e8cbdb889ac631f4a5c0.zip | |
Add doc for pmgen semioptional statement, Add pmgen changes to CHANGELOG
Signed-off-by: Clifford Wolf <clifford@clifford.at>
| -rw-r--r-- | CHANGELOG | 1 | ||||
| -rw-r--r-- | passes/pmgen/README.md | 3 |
2 files changed, 4 insertions, 0 deletions
@@ -19,6 +19,7 @@ Yosys 0.9 .. Yosys 0.9-dev - Added automatic gzip compression (based on filename extension) for backends - Improve attribute and parameter encoding in JSON to avoid ambiguities between bit vectors and strings containing [01xz]* + - Improvements in pmgen: subpattern and recursive matches Yosys 0.8 .. Yosys 0.8-dev -------------------------- diff --git a/passes/pmgen/README.md b/passes/pmgen/README.md index 4aa7de162..f92445a86 100644 --- a/passes/pmgen/README.md +++ b/passes/pmgen/README.md @@ -175,6 +175,9 @@ explore the case where `mul` is set to `nullptr`. Without the `optional` statement a match may only be assigned nullptr when one of the `if` expressions evaluates to `false`. +The `semioptional` statement marks matches that must match if at least one +matching cell exists, but if no matching cell exists it is set to `nullptr`. + Additional code --------------- |