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Rewrite multirange arrays sizes [n] as [n-1:0] 

Signed-off-by: Lukasz Dalek <ldalek@antmicro.com>
This commit is contained in:
Lukasz Dalek 2020-07-17 13:41:09 +02:00
parent c39ebe6ae0
commit 83ddc62034
1 changed files with 11 additions and 2 deletions
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13
frontends/verilog/verilog_parser.y
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@ -210,14 +210,23 @@ static AstNode *checkRange(AstNode *type_node, AstNode *range_node)
return range_node;
}
static void rewriteAsMemoryNode(AstNode *node, AstNode *rangeNode)
static void rewriteRange(AstNode *rangeNode)
{
node->type = AST_MEMORY;
if (rangeNode->type == AST_RANGE && rangeNode->children.size() == 1) {
// SV array size [n], rewrite as [n-1:0]
rangeNode->children[0] = new AstNode(AST_SUB, rangeNode->children[0], AstNode::mkconst_int(1, true));
rangeNode->children.push_back(AstNode::mkconst_int(0, false));
}
}
static void rewriteAsMemoryNode(AstNode *node, AstNode *rangeNode)
{
node->type = AST_MEMORY;
if (rangeNode->type == AST_MULTIRANGE) {
for (auto *itr : rangeNode->children)
rewriteRange(itr);
} else
rewriteRange(rangeNode);
node->children.push_back(rangeNode);
}