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| author | Eddie Hung <eddie@fpgeh.com> | 2020-04-01 09:59:23 -0700 |
|---|---|---|
| committer | Eddie Hung <eddie@fpgeh.com> | 2020-04-01 09:59:23 -0700 |
| commit | c22fb76664559abb0bac838e03a34b140d3146ee (patch) | |
| tree | 933838e49bb1b2eb95f9db023e44af144f0d47f6 /frontends | |
| parent | 5132f4099b0a09b542cdb32c3bcdee24917ca5f1 (diff) | |
| download | yosys-c22fb76664559abb0bac838e03a34b140d3146ee.tar.gz yosys-c22fb76664559abb0bac838e03a34b140d3146ee.tar.bz2 yosys-c22fb76664559abb0bac838e03a34b140d3146ee.zip | |
ast: cap dynamic range select to size of signal, suppresses warnings
Diffstat (limited to 'frontends')
| -rw-r--r-- | frontends/ast/simplify.cc | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/frontends/ast/simplify.cc b/frontends/ast/simplify.cc index 073b9cbbe..26c1cc7a9 100644 --- a/frontends/ast/simplify.cc +++ b/frontends/ast/simplify.cc @@ -1732,8 +1732,9 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage, AstNode *cond = new AstNode(AST_COND, mkconst_int(start_bit, true)); AstNode *lvalue = children[0]->clone(); lvalue->delete_children(); + int end_bit = std::min(start_bit+result_width,source_width) - 1; lvalue->children.push_back(new AstNode(AST_RANGE, - mkconst_int(start_bit+result_width-1, true), mkconst_int(start_bit, true))); + mkconst_int(end_bit, true), mkconst_int(start_bit, true))); cond->children.push_back(new AstNode(AST_BLOCK, new AstNode(type, lvalue, children[1]->clone()))); newNode->children.push_back(cond); } |