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Support little endian bit vectors ("reg [0:2] x;").

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This commit is contained in:
Wilson Snyder
2009-10-25 16:53:55 -04:00
parent 350028553b
commit 39444d83c5
25 changed files with 785 additions and 287 deletions
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src/V3Const.cpp
+9 -19
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@@ -1053,7 +1053,7 @@ private:
nodep->iterateChildren(*this);
if (!nodep->varp()) nodep->v3fatalSrc("Not linked");
bool did=false;
if (!m_cpp && nodep->varp()->hasSimpleInit()) {
if (!m_cpp && nodep->varp()->hasSimpleInit() && !nodep->backp()->castAttrOf()) {
//if (debug()) nodep->varp()->initp()->dumpTree(cout," visitvaref: ");
nodep->varp()->initp()->iterateAndNext(*this);
if (operandConst(nodep->varp()->initp())
@@ -1079,23 +1079,7 @@ private:
V3Number num (nodep->fileline(), 32, nodep->fromp()->widthMin());
replaceNum(nodep, num); nodep=NULL;
} else {
if (!nodep->fromp()->castNodeVarRef()) nodep->v3fatalSrc("Not linked");
AstVar* varp = nodep->fromp()->castNodeVarRef()->varp();
if (!varp) nodep->v3fatalSrc("Not linked");
if (nodep->attrType()==AstAttrType::RANGE_LSB) {
if (!varp->rangep()) nodep->v3fatalSrc("RANGE_LSB on vec w/o range\n");
if (operandConst(varp->rangep()->lsbp())) {
V3Number num (nodep->fileline(), 32, varp->lsb());
replaceNum(nodep, num); nodep=NULL;
}
} else if (nodep->attrType()==AstAttrType::ARRAY_LSB) {
AstRange* arrayp=varp->arrayp(nodep->dimension());
if (!arrayp) nodep->v3fatalSrc("ARRAY_LSB on vec w/o range or right # dimensions\n");
if (operandConst(arrayp->lsbp())) {
V3Number num (nodep->fileline(), 32, arrayp->lsbConst());
replaceNum(nodep, num); nodep=NULL;
}
} else nodep->v3fatalSrc("Missing ATTR type case\n");
nodep->v3fatalSrc("Missing ATTR type case");
}
}
bool onlySenItemInSenTree(AstNodeSenItem* nodep) {
@@ -1471,6 +1455,10 @@ private:
}
}
// These are converted by V3Param. Don't constify as we don't want the from() VARREF to disappear, if any
// If output of a presel didn't get consted, chances are V3Param didn't visit properly
virtual void visit(AstNodePreSel* nodep, AstNUser*) {}
//-----
// Below lines are magic expressions processed by astgen
// "AstNODETYPE { # bracket not paren
@@ -1746,7 +1734,9 @@ public:
AstNode* V3Const::constifyParamsEdit(AstNode* nodep) {
//if (debug()>0) nodep->dumpTree(cout," forceConPRE : ");
nodep = V3Width::widthParamsEditIfNeed(nodep); // Make sure we've sized everything first
// Resize even if the node already has a width, because burried in the treee we may
// have a node we just created with signing, etc, that isn't sized yet.
nodep = V3Width::widthParamsEdit(nodep); // Make sure we've sized everything first
ConstVisitor visitor (true,false,false,false);
if (AstVar* varp=nodep->castVar()) {
// If a var wants to be constified, it's really a param, and