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rtlil.cc: Fix #4427

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If a `RTLIL::Const` is composed of multiple strings, such as when using a ternary expression to select between two strings of different lengths, zero padding for the strings needs to be maintained.
Only leading (and trailing) null characters should be dropped from the decoded string, rather than all null characters.
This commit is contained in:
Krystine Sherwin
2024-06-10 14:18:49 +12:00
parent 9f94ecf4ed
commit 94b44a37b2
1 changed files with 3 additions and 5 deletions
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8
kernel/rtlil.cc
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@@ -325,8 +325,7 @@ std::string RTLIL::Const::decode_string() const
ch |= 1 << j;
}
}
if (ch != 0)
s.append({ch});
s.append({ch});
}
i -= 8;
for (; i >= 0; i -= 8) {
@@ -336,10 +335,9 @@ std::string RTLIL::Const::decode_string() const
ch |= 1 << j;
}
}
if (ch != 0)
s.append({ch});
s.append({ch});
}
return s;
return s.substr(s.find_first_not_of('\0'));
}
bool RTLIL::Const::is_fully_zero() const