diff options
Diffstat (limited to 'frontends/ast/genrtlil.cc')
| -rw-r--r-- | frontends/ast/genrtlil.cc | 80 |
1 files changed, 71 insertions, 9 deletions
diff --git a/frontends/ast/genrtlil.cc b/frontends/ast/genrtlil.cc index 8b122a7a..ab22b865 100644 --- a/frontends/ast/genrtlil.cc +++ b/frontends/ast/genrtlil.cc @@ -508,8 +508,10 @@ struct AST_INTERNAL::ProcessGenerator void AstNode::detectSignWidthWorker(int &width_hint, bool &sign_hint) { std::string type_name; - bool dummy_sign_hint = true; - // int dummy_width_hint = -1; + bool sub_sign_hint = true; + int sub_width_hint = -1; + int this_width = 0; + AstNode *range = NULL; switch (type) { @@ -520,23 +522,83 @@ void AstNode::detectSignWidthWorker(int &width_hint, bool &sign_hint) break; case AST_IDENTIFIER: - if ((id2ast && !id2ast->is_signed) || children.size() > 0) + if (!id2ast) + log_error("Failed to resolve identifier %s for width detection at %s:%d!\n", str.c_str(), filename.c_str(), linenum); + if ((id2ast->type == AST_PARAMETER || id2ast->type == AST_LOCALPARAM) && id2ast->children[0]->type == AST_CONSTANT) { + this_width = id2ast->children[0]->bits.size(); + if (children.size() != 0) + range = children[0]; + } else if (id2ast->type == AST_WIRE || id2ast->type == AST_AUTOWIRE) { + if (!id2ast->range_valid) { + if (id2ast->type == AST_AUTOWIRE) + this_width = 1; + else { + current_ast_mod->dumpAst(stdout, ""); + printf("---\n"); + dumpAst(stdout, ""); + fflush(stdout); + log_error("Failed to detect with of signal access `%s' at %s:%d!\n", str.c_str(), filename.c_str(), linenum); + } + } else { + this_width = id2ast->range_left - id2ast->range_right + 1; + if (children.size() != 0) + range = children[0]; + } + } else if (id2ast->type == AST_GENVAR) { + this_width = 32; + } else if (id2ast->type == AST_MEMORY) { + if (!id2ast->children[0]->range_valid) + log_error("Failed to detect with of memory access `%s' at %s:%d!\n", str.c_str(), filename.c_str(), linenum); + this_width = id2ast->children[0]->range_left - id2ast->children[0]->range_right + 1; + } else + log_error("Failed to detect width for identifier %s at %s:%d!\n", str.c_str(), filename.c_str(), linenum); + if (range) { + if (range->children.size() == 1) + this_width = 1; + else if (!range->range_valid) { + AstNode *left_at_zero_ast = children[0]->children[0]->clone(); + AstNode *right_at_zero_ast = children[0]->children.size() >= 2 ? children[0]->children[1]->clone() : left_at_zero_ast->clone(); + while (left_at_zero_ast->simplify(true, true, false, 1, -1, false)) { } + while (right_at_zero_ast->simplify(true, true, false, 1, -1, false)) { } + if (left_at_zero_ast->type != AST_CONSTANT || right_at_zero_ast->type != AST_CONSTANT) + log_error("Unsupported expression on dynamic range select on signal `%s' at %s:%d!\n", + str.c_str(), filename.c_str(), linenum); + this_width = left_at_zero_ast->integer - right_at_zero_ast->integer + 1; + delete left_at_zero_ast; + delete right_at_zero_ast; + } else + this_width = range->range_left - range->range_right + 1; + } else + width_hint = std::max(width_hint, this_width); + if (!id2ast->is_signed) sign_hint = false; - width_hint = std::max(width_hint, genRTLIL().width); break; case AST_TO_SIGNED: - children.at(0)->detectSignWidthWorker(width_hint, dummy_sign_hint); + children.at(0)->detectSignWidthWorker(width_hint, sub_sign_hint); break; case AST_TO_UNSIGNED: - children.at(0)->detectSignWidthWorker(width_hint, dummy_sign_hint); + children.at(0)->detectSignWidthWorker(width_hint, sub_sign_hint); sign_hint = false; break; case AST_CONCAT: + for (auto child : children) { + sub_width_hint = 0; + sub_sign_hint = true; + child->detectSignWidthWorker(sub_width_hint, sub_sign_hint); + this_width += sub_width_hint; + } + width_hint = std::max(width_hint, this_width); + sign_hint = false; + break; + case AST_REPLICATE: - width_hint = std::max(width_hint, genRTLIL().width); + if (children[0]->type != AST_CONSTANT) + log_error("Left operand of replicate expression is not constant at %s:%d!\n", filename.c_str(), linenum); + children[1]->detectSignWidthWorker(sub_width_hint, sub_sign_hint); + width_hint = std::max(width_hint, children[0]->bitsAsConst().as_int() * sub_width_hint); sign_hint = false; break; @@ -797,8 +859,8 @@ RTLIL::SigSpec AstNode::genRTLIL(int width_hint, bool sign_hint) if (!children[0]->range_valid) { AstNode *left_at_zero_ast = children[0]->children[0]->clone(); AstNode *right_at_zero_ast = children[0]->children.size() >= 2 ? children[0]->children[1]->clone() : left_at_zero_ast->clone(); - while (left_at_zero_ast->simplify(true, true, false, 1)) { } - while (right_at_zero_ast->simplify(true, true, false, 1)) { } + while (left_at_zero_ast->simplify(true, true, false, 1, -1, false)) { } + while (right_at_zero_ast->simplify(true, true, false, 1, -1, false)) { } if (left_at_zero_ast->type != AST_CONSTANT || right_at_zero_ast->type != AST_CONSTANT) log_error("Unsupported expression on dynamic range select on signal `%s' at %s:%d!\n", str.c_str(), filename.c_str(), linenum); |