diff options
Diffstat (limited to 'frontends')
| -rw-r--r-- | frontends/ast/ast.h | 1 | ||||
| -rw-r--r-- | frontends/ast/simplify.cc | 13 |
2 files changed, 11 insertions, 3 deletions
diff --git a/frontends/ast/ast.h b/frontends/ast/ast.h index 48ec9a063..80497c131 100644 --- a/frontends/ast/ast.h +++ b/frontends/ast/ast.h @@ -268,6 +268,7 @@ namespace AST struct varinfo_t { RTLIL::Const val; int offset; + bool range_swapped; bool is_signed; AstNode *arg = nullptr; bool explicitly_sized; diff --git a/frontends/ast/simplify.cc b/frontends/ast/simplify.cc index 18b1e1e11..524ae6318 100644 --- a/frontends/ast/simplify.cc +++ b/frontends/ast/simplify.cc @@ -5134,6 +5134,8 @@ bool AstNode::replace_variables(std::map<std::string, AstNode::varinfo_t> &varia width = min(std::abs(children.at(0)->range_left - children.at(0)->range_right) + 1, width); } offset -= variables.at(str).offset; + if (variables.at(str).range_swapped) + offset = -offset; std::vector<RTLIL::State> &var_bits = variables.at(str).val.bits; std::vector<RTLIL::State> new_bits(var_bits.begin() + offset, var_bits.begin() + offset + width); AstNode *newNode = mkconst_bits(new_bits, variables.at(str).is_signed); @@ -5191,7 +5193,8 @@ AstNode *AstNode::eval_const_function(AstNode *fcall, bool must_succeed) log_file_error(filename, location.first_line, "Incompatible re-declaration of constant function wire %s.\n", stmt->str.c_str()); } variable.val = RTLIL::Const(RTLIL::State::Sx, width); - variable.offset = min(stmt->range_left, stmt->range_right); + variable.offset = stmt->range_swapped ? stmt->range_left : stmt->range_right; + variable.range_swapped = stmt->range_swapped; variable.is_signed = stmt->is_signed; variable.explicitly_sized = stmt->children.size() && stmt->children.back()->type == AST_RANGE; @@ -5276,8 +5279,12 @@ AstNode *AstNode::eval_const_function(AstNode *fcall, bool must_succeed) int width = std::abs(range->range_left - range->range_right) + 1; varinfo_t &v = variables[stmt->children.at(0)->str]; RTLIL::Const r = stmt->children.at(1)->bitsAsConst(v.val.bits.size()); - for (int i = 0; i < width; i++) - v.val.bits.at(i+offset-v.offset) = r.bits.at(i); + for (int i = 0; i < width; i++) { + int index = i + offset - v.offset; + if (v.range_swapped) + index = -index; + v.val.bits.at(index) = r.bits.at(i); + } } delete block->children.front(); |