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Fixed part selects of parameters

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This commit is contained in:
Clifford Wolf 2014-07-28 16:45:26 +02:00
parent a03297a7df
commit ec58965967
2 changed files with 31 additions and 7 deletions
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23
frontends/ast/simplify.cc
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@ -575,6 +575,10 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
}
children[0]->is_signed = is_signed;
}
range_valid = true;
range_swapped = children[1]->range_swapped;
range_left = children[1]->range_left;
range_right = children[1]->range_right;
} else
if (children.size() > 1 && children[1]->type == AST_REALVALUE && children[0]->type == AST_CONSTANT) {
double as_realvalue = children[0]->asReal(sign_hint);
@ -1522,8 +1526,23 @@ skip_dynamic_range_lvalue_expansion:;
if (current_scope[str]->children[0]->type == AST_CONSTANT) {
if (children.size() != 0 && children[0]->type == AST_RANGE && children[0]->range_valid) {
std::vector<RTLIL::State> data;
for (int i = children[0]->range_right; i <= children[0]->range_left; i++)
data.push_back(current_scope[str]->children[0]->bits[i]);
bool param_upto = current_scope[str]->range_valid && current_scope[str]->range_swapped;
int param_offset = current_scope[str]->range_valid ? current_scope[str]->range_right : 0;
int param_width = current_scope[str]->range_valid ? current_scope[str]->range_left - current_scope[str]->range_right + 1 :
SIZE(current_scope[str]->children[0]->bits);
int tmp_range_left = children[0]->range_left, tmp_range_right = children[0]->range_right;
if (param_upto) {
tmp_range_left = (param_width + 2*param_offset) - children[0]->range_right - 1;
tmp_range_right = (param_width + 2*param_offset) - children[0]->range_left - 1;
}
log_dump(param_upto, param_offset, param_width, children[0]->range_left, children[0]->range_right, tmp_range_left, tmp_range_right);
for (int i = tmp_range_right; i <= tmp_range_left; i++) {
int index = i - param_offset;
if (0 <= index && index < param_width)
data.push_back(current_scope[str]->children[0]->bits[index]);
else
data.push_back(RTLIL::State::Sx);
}
newNode = mkconst_bits(data, false);
} else
if (children.size() == 0)