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| author | Dan Gisselquist <zipcpu@gmail.com> | 2018-10-01 19:41:35 +0200 |
|---|---|---|
| committer | Clifford Wolf <clifford@clifford.at> | 2018-10-01 19:41:35 +0200 |
| commit | 62424ef3de67dc8077a0ca03b302966f0284730f (patch) | |
| tree | 6ba3ede3616b9c2d12c562ee5774121ab72802ed /frontends/ast | |
| parent | 4d2917447cc14c590b4fee5ba36948fb4ee6884b (diff) | |
| download | yosys-62424ef3de67dc8077a0ca03b302966f0284730f.tar.gz yosys-62424ef3de67dc8077a0ca03b302966f0284730f.tar.bz2 yosys-62424ef3de67dc8077a0ca03b302966f0284730f.zip | |
Add read_verilog $changed support
Signed-off-by: Clifford Wolf <clifford@clifford.at>
Diffstat (limited to 'frontends/ast')
| -rw-r--r-- | frontends/ast/simplify.cc | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/frontends/ast/simplify.cc b/frontends/ast/simplify.cc index aa3b982d8..71eba547c 100644 --- a/frontends/ast/simplify.cc +++ b/frontends/ast/simplify.cc @@ -1836,7 +1836,7 @@ skip_dynamic_range_lvalue_expansion:; goto apply_newNode; } - if (str == "\\$stable" || str == "\\$rose" || str == "\\$fell") + if (str == "\\$stable" || str == "\\$rose" || str == "\\$fell" || str == "\\$changed") { if (GetSize(children) != 1) log_file_error(filename, linenum, "System function %s got %d arguments, expected 1.\n", @@ -1853,6 +1853,9 @@ skip_dynamic_range_lvalue_expansion:; if (str == "\\$stable") newNode = new AstNode(AST_EQ, past, present); + else if (str == "\\$changed") + newNode = new AstNode(AST_NE, past, present); + else if (str == "\\$rose") newNode = new AstNode(AST_LOGIC_AND, new AstNode(AST_LOGIC_NOT, past), present); |