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Add warning on mis-sized literal, bug1156.

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This commit is contained in:
Wilson Snyder
2017-04-26 18:34:01 -04:00
parent 62b3deb90d
commit bdeee35669
5 changed files with 45 additions and 7 deletions
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src/V3Number.cpp
+12 -6
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@@ -48,7 +48,7 @@ V3Number::V3Number(VerilogStringLiteral, FileLine* fileline, const string& str)
}
}
}
opCleanThis();
opCleanThis(true);
}
V3Number::V3Number (FileLine* fileline, const char* sourcep) {
@@ -254,7 +254,7 @@ V3Number::V3Number (FileLine* fileline, const char* sourcep) {
setBit(obit, bitIs(obit-1));
obit++;
}
opCleanThis();
opCleanThis(true);
//printf("Dump \"%s\" CP \"%s\" B '%c' %d W %d\n", sourcep, value_startp, base, width(), m_value[0]);
}
@@ -1587,10 +1587,16 @@ V3Number& V3Number::opClean (const V3Number& lhs, uint32_t bits) {
return opSel(lhs, bits-1, 0);
}
void V3Number::opCleanThis() {
// Clean in place number
m_value[words()-1] &= hiWordMask();
m_valueX[words()-1] &= hiWordMask();
void V3Number::opCleanThis(bool warnOnTruncation) {
// Clean MSB of number
uint32_t newValueMsb = m_value[words()-1] & hiWordMask();
uint32_t newValueXMsb = m_valueX[words()-1] & hiWordMask();
if (warnOnTruncation && (newValueMsb != m_value[words()-1] || newValueXMsb != m_valueX[words()-1])) {
// Displaying in decimal avoids hiWordMask truncation
m_fileline->v3warn(WIDTH,"Value too large for "<<width()<<" bit number: "<<displayed(m_fileline, "%d"));
}
m_value[words()-1] = newValueMsb;
m_valueX[words()-1] = newValueXMsb;
}
V3Number& V3Number::opSel (const V3Number& lhs, const V3Number& msb, const V3Number& lsb) {