namespace llvm {
-template <typename T, unsigned BitNum, bool isSigned>
+template <typename T, unsigned BitNum, typename BitVectorTy, bool isSigned>
class PackedVectorBase;
// This won't be necessary if we can specialize members without specializing
// the parent template.
-template <typename T, unsigned BitNum>
-class PackedVectorBase<T, BitNum, false> {
+template <typename T, unsigned BitNum, typename BitVectorTy>
+class PackedVectorBase<T, BitNum, BitVectorTy, false> {
protected:
- static T getValue(const llvm::BitVector &Bits, unsigned Idx) {
+ static T getValue(const BitVectorTy &Bits, unsigned Idx) {
T val = T();
for (unsigned i = 0; i != BitNum; ++i)
val = T(val | ((Bits[(Idx << (BitNum-1)) + i] ? 1UL : 0UL) << i));
return val;
}
- static void setValue(llvm::BitVector &Bits, unsigned Idx, T val) {
+ static void setValue(BitVectorTy &Bits, unsigned Idx, T val) {
assert((val >> BitNum) == 0 && "value is too big");
for (unsigned i = 0; i != BitNum; ++i)
Bits[(Idx << (BitNum-1)) + i] = val & (T(1) << i);
}
};
-template <typename T, unsigned BitNum>
-class PackedVectorBase<T, BitNum, true> {
+template <typename T, unsigned BitNum, typename BitVectorTy>
+class PackedVectorBase<T, BitNum, BitVectorTy, true> {
protected:
- static T getValue(const llvm::BitVector &Bits, unsigned Idx) {
+ static T getValue(const BitVectorTy &Bits, unsigned Idx) {
T val = T();
for (unsigned i = 0; i != BitNum-1; ++i)
val = T(val | ((Bits[(Idx << (BitNum-1)) + i] ? 1UL : 0UL) << i));
return val;
}
- static void setValue(llvm::BitVector &Bits, unsigned Idx, T val) {
+ static void setValue(BitVectorTy &Bits, unsigned Idx, T val) {
if (val < 0) {
val = ~val;
Bits.set((Idx << (BitNum-1)) + BitNum-1);
/// @endcode
/// will create a vector accepting values -2, -1, 0, 1. Any other value will hit
/// an assertion.
-template <typename T, unsigned BitNum>
-class PackedVector : public PackedVectorBase<T, BitNum,
+template <typename T, unsigned BitNum, typename BitVectorTy = BitVector>
+class PackedVector : public PackedVectorBase<T, BitNum, BitVectorTy,
std::numeric_limits<T>::is_signed> {
- llvm::BitVector Bits;
- typedef PackedVectorBase<T, BitNum, std::numeric_limits<T>::is_signed> base;
+ BitVectorTy Bits;
+ typedef PackedVectorBase<T, BitNum, BitVectorTy,
+ std::numeric_limits<T>::is_signed> base;
public:
class reference {
Vec.setValue(Vec.Bits, Idx, val);
return *this;
}
- operator T() {
+ operator T() const {
return Vec.getValue(Vec.Bits, Idx);
}
};