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Diffstat (limited to 'frontends/ast/ast.cc')
| -rw-r--r-- | frontends/ast/ast.cc | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/frontends/ast/ast.cc b/frontends/ast/ast.cc index 967111d30..3f704bea4 100644 --- a/frontends/ast/ast.cc +++ b/frontends/ast/ast.cc @@ -783,6 +783,8 @@ double AstNode::asReal(bool is_signed) double v = 0; for (size_t i = 0; i < val.bits.size(); i++) + // IEEE Std 1800-2012 Par 6.12.2: Individual bits that are x or z in + // the net or the variable shall be treated as zero upon conversion. if (val.bits.at(i) == RTLIL::State::S1) v += exp2(i); if (is_negative) |