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Added AstNode::mkconst_str API

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This commit is contained in:
Clifford Wolf 2013-12-05 12:53:49 +01:00
parent 853538d78b
commit 5c39948ead
3 changed files with 19 additions and 12 deletions
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17
frontends/ast/ast.cc
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@ -658,6 +658,23 @@ AstNode *AstNode::mkconst_bits(const std::vector<RTLIL::State> &v, bool is_signe
return node;
}
// create an AST node for a constant (using a string as value)
AstNode *AstNode::mkconst_str(const std::string &str)
{
std::vector<RTLIL::State> data;
data.reserve(str.size() * 8);
for (size_t i = 0; i < str.size(); i++) {
unsigned char ch = str[str.size() - i - 1];
for (int j = 0; j < 8; j++) {
data.push_back((ch & 1) ? RTLIL::S1 : RTLIL::S0);
ch = ch >> 1;
}
}
AstNode *node = AstNode::mkconst_bits(data, false);
node->str = str;
return node;
}
RTLIL::Const AstNode::bitsAsConst(int width, bool is_signed)
{
std::vector<RTLIL::State> bits = this->bits;