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Add error on DPI functions > 32 bits, msg1995.

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This commit is contained in:
Wilson Snyder
2016-09-10 08:14:17 -04:00
parent 45d7312dfc
commit 3f143317a6
6 changed files with 58 additions and 4 deletions
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src/V3Task.cpp
+9 -4
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@@ -584,9 +584,14 @@ private:
return new AstCStmt(portp->fileline(), stmt);
}
AstNode* createAssignInternalToDpi(AstVar* portp, bool isPtr, const string& frSuffix, const string& toSuffix) {
AstNode* createAssignInternalToDpi(AstVar* portp, bool isRtn, bool isPtr,
const string& frSuffix, const string& toSuffix) {
// Create assignment from internal format into DPI temporary
bool bitvec = (portp->basicp()->isBitLogic() && portp->width() > 32);
if (isRtn && bitvec) {
portp->v3error("DPI functions cannot return > 32 bits; use a two-state type or task instead: "<<portp->prettyName());
// Code below works, but won't compile right, and IEEE illegal
}
string stmt;
string ket;
// Someday we'll have better type support, and this can make variables and casts.
@@ -727,14 +732,14 @@ private:
for (AstNode* stmtp = nodep->stmtsp(); stmtp; stmtp=stmtp->nextp()) {
if (AstVar* portp = stmtp->castVar()) {
if (portp->isIO() && portp->isOutput() && !portp->isFuncReturn()) {
dpip->addStmtsp(createAssignInternalToDpi(portp,true,"__Vcvt",""));
dpip->addStmtsp(createAssignInternalToDpi(portp,false,true,"__Vcvt",""));
}
}
}
if (rtnvarp) {
dpip->addStmtsp(createDpiTemp(rtnvarp,""));
dpip->addStmtsp(createAssignInternalToDpi(rtnvarp,false,"__Vcvt",""));
dpip->addStmtsp(createAssignInternalToDpi(rtnvarp,true,false,"__Vcvt",""));
string stmt = "return "+rtnvarp->name()+";\n";
dpip->addStmtsp(new AstCStmt(nodep->fileline(), stmt));
}
@@ -784,7 +789,7 @@ private:
cfuncp->addStmtsp(createDpiTemp(portp,"__Vcvt"));
if (portp->isInput()) {
cfuncp->addStmtsp(createAssignInternalToDpi(portp,false,"","__Vcvt"));
cfuncp->addStmtsp(createAssignInternalToDpi(portp,false,false,"","__Vcvt"));
}
}
}