inline static unsigned getDigit(char cdigit, uint8_t radix) {
unsigned r;
- if (radix == 16) {
+ if (radix == 16 || radix == 36) {
r = cdigit - '0';
if (r <= 9)
return r;
r = cdigit - 'A';
- if (r <= 5)
+ if (r <= radix - 11U)
return r + 10;
r = cdigit - 'a';
- if (r <= 5)
+ if (r <= radix - 11U)
return r + 10;
+
+ radix = 10;
}
r = cdigit - '0';
memcpy(pVal, that.pVal, getNumWords() * APINT_WORD_SIZE);
}
-
-APInt::APInt(unsigned numBits, unsigned numWords, const uint64_t bigVal[])
- : BitWidth(numBits), VAL(0) {
+void APInt::initFromArray(ArrayRef<uint64_t> bigVal) {
assert(BitWidth && "Bitwidth too small");
- assert(bigVal && "Null pointer detected!");
+ assert(bigVal.data() && "Null pointer detected!");
if (isSingleWord())
VAL = bigVal[0];
else {
// Get memory, cleared to 0
pVal = getClearedMemory(getNumWords());
// Calculate the number of words to copy
- unsigned words = std::min<unsigned>(numWords, getNumWords());
+ unsigned words = std::min<unsigned>(bigVal.size(), getNumWords());
// Copy the words from bigVal to pVal
- memcpy(pVal, bigVal, words * APINT_WORD_SIZE);
+ memcpy(pVal, bigVal.data(), words * APINT_WORD_SIZE);
}
// Make sure unused high bits are cleared
clearUnusedBits();
}
+APInt::APInt(unsigned numBits, ArrayRef<uint64_t> bigVal)
+ : BitWidth(numBits), VAL(0) {
+ initFromArray(bigVal);
+}
+
+APInt::APInt(unsigned numBits, unsigned numWords, const uint64_t bigVal[])
+ : BitWidth(numBits), VAL(0) {
+ initFromArray(makeArrayRef(bigVal, numWords));
+}
+
APInt::APInt(unsigned numbits, StringRef Str, uint8_t radix)
: BitWidth(numbits), VAL(0) {
assert(BitWidth && "Bitwidth too small");
clearAllBits();
unsigned wordsToCopy = destWords >= getNumWords() ? getNumWords() : destWords;
memcpy(pVal, dest, wordsToCopy * APINT_WORD_SIZE);
+ clearUnusedBits();
// delete dest array and return
delete[] dest;
return APInt(BitWidth, VAL * RHS.VAL);
APInt Result(*this);
Result *= RHS;
- return Result.clearUnusedBits();
+ return Result;
}
APInt APInt::operator+(const APInt& RHS) const {
unsigned APInt::getBitsNeeded(StringRef str, uint8_t radix) {
assert(!str.empty() && "Invalid string length");
- assert((radix == 10 || radix == 8 || radix == 16 || radix == 2) &&
- "Radix should be 2, 8, 10, or 16!");
+ assert((radix == 10 || radix == 8 || radix == 16 || radix == 2 ||
+ radix == 36) &&
+ "Radix should be 2, 8, 10, 16, or 36!");
size_t slen = str.size();
if (radix == 16)
return slen * 4 + isNegative;
+ // FIXME: base 36
+
// This is grossly inefficient but accurate. We could probably do something
// with a computation of roughly slen*64/20 and then adjust by the value of
// the first few digits. But, I'm not sure how accurate that could be.
// be too large. This avoids the assertion in the constructor. This
// calculation doesn't work appropriately for the numbers 0-9, so just use 4
// bits in that case.
- unsigned sufficient = slen == 1 ? 4 : slen * 64/18;
+ unsigned sufficient
+ = radix == 10? (slen == 1 ? 4 : slen * 64/18)
+ : (slen == 1 ? 7 : slen * 16/3);
// Convert to the actual binary value.
APInt tmp(sufficient, StringRef(p, slen), radix);
return Count;
}
+/// Perform a logical right-shift from Src to Dst, which must be equal or
+/// non-overlapping, of Words words, by Shift, which must be less than 64.
+static void lshrNear(uint64_t *Dst, uint64_t *Src, unsigned Words,
+ unsigned Shift) {
+ uint64_t Carry = 0;
+ for (int I = Words - 1; I >= 0; --I) {
+ uint64_t Tmp = Src[I];
+ Dst[I] = (Tmp >> Shift) | Carry;
+ Carry = Tmp << (64 - Shift);
+ }
+}
+
APInt APInt::byteSwap() const {
assert(BitWidth >= 16 && BitWidth % 16 == 0 && "Cannot byteswap!");
if (BitWidth == 16)
return APInt(BitWidth, ByteSwap_16(uint16_t(VAL)));
- else if (BitWidth == 32)
+ if (BitWidth == 32)
return APInt(BitWidth, ByteSwap_32(unsigned(VAL)));
- else if (BitWidth == 48) {
+ if (BitWidth == 48) {
unsigned Tmp1 = unsigned(VAL >> 16);
Tmp1 = ByteSwap_32(Tmp1);
uint16_t Tmp2 = uint16_t(VAL);
Tmp2 = ByteSwap_16(Tmp2);
return APInt(BitWidth, (uint64_t(Tmp2) << 32) | Tmp1);
- } else if (BitWidth == 64)
+ }
+ if (BitWidth == 64)
return APInt(BitWidth, ByteSwap_64(VAL));
- else {
- APInt Result(BitWidth, 0);
- char *pByte = (char*)Result.pVal;
- for (unsigned i = 0; i < BitWidth / APINT_WORD_SIZE / 2; ++i) {
- char Tmp = pByte[i];
- pByte[i] = pByte[BitWidth / APINT_WORD_SIZE - 1 - i];
- pByte[BitWidth / APINT_WORD_SIZE - i - 1] = Tmp;
- }
- return Result;
+
+ APInt Result(getNumWords() * APINT_BITS_PER_WORD, 0);
+ for (unsigned I = 0, N = getNumWords(); I != N; ++I)
+ Result.pVal[I] = ByteSwap_64(pVal[N - I - 1]);
+ if (Result.BitWidth != BitWidth) {
+ lshrNear(Result.pVal, Result.pVal, getNumWords(),
+ Result.BitWidth - BitWidth);
+ Result.BitWidth = BitWidth;
}
+ return Result;
}
APInt llvm::APIntOps::GreatestCommonDivisor(const APInt& API1,
return *this;
}
+APInt APInt::zextOrSelf(unsigned width) const {
+ if (BitWidth < width)
+ return zext(width);
+ return *this;
+}
+
+APInt APInt::sextOrSelf(unsigned width) const {
+ if (BitWidth < width)
+ return sext(width);
+ return *this;
+}
+
/// Arithmetic right-shift this APInt by shiftAmt.
/// @brief Arithmetic right-shift function.
APInt APInt::ashr(const APInt &shiftAmt) const {
/// @brief Logical right-shift function.
APInt APInt::lshr(unsigned shiftAmt) const {
if (isSingleWord()) {
- if (shiftAmt == BitWidth)
+ if (shiftAmt >= BitWidth)
return APInt(BitWidth, 0);
else
return APInt(BitWidth, this->VAL >> shiftAmt);
// If we are shifting less than a word, compute the shift with a simple carry
if (shiftAmt < APINT_BITS_PER_WORD) {
- uint64_t carry = 0;
- for (int i = getNumWords()-1; i >= 0; --i) {
- val[i] = (pVal[i] >> shiftAmt) | carry;
- carry = pVal[i] << (APINT_BITS_PER_WORD - shiftAmt);
- }
+ lshrNear(val, pVal, getNumWords(), shiftAmt);
return APInt(val, BitWidth).clearUnusedBits();
}
}
APInt APInt::rotl(unsigned rotateAmt) const {
+ rotateAmt %= BitWidth;
if (rotateAmt == 0)
return *this;
- // Don't get too fancy, just use existing shift/or facilities
- APInt hi(*this);
- APInt lo(*this);
- hi.shl(rotateAmt);
- lo.lshr(BitWidth - rotateAmt);
- return hi | lo;
+ return shl(rotateAmt) | lshr(BitWidth - rotateAmt);
}
APInt APInt::rotr(const APInt &rotateAmt) const {
}
APInt APInt::rotr(unsigned rotateAmt) const {
+ rotateAmt %= BitWidth;
if (rotateAmt == 0)
return *this;
- // Don't get too fancy, just use existing shift/or facilities
- APInt hi(*this);
- APInt lo(*this);
- lo.lshr(rotateAmt);
- hi.shl(BitWidth - rotateAmt);
- return hi | lo;
+ return lshr(rotateAmt) | shl(BitWidth - rotateAmt);
}
// Square Root - this method computes and returns the square root of "this".
uint64_t(::round(::sqrt(double(isSingleWord()?VAL:pVal[0])))));
#else
return APInt(BitWidth,
- uint64_t(::sqrt(double(isSingleWord()?VAL:pVal[0]))) + 0.5);
+ uint64_t(::sqrt(double(isSingleWord()?VAL:pVal[0])) + 0.5));
#endif
}
APInt nextSquare((x_old + 1) * (x_old +1));
if (this->ult(square))
return x_old;
- else if (this->ule(nextSquare)) {
- APInt midpoint((nextSquare - square).udiv(two));
- APInt offset(*this - square);
- if (offset.ult(midpoint))
- return x_old;
- else
- return x_old + 1;
- } else
- llvm_unreachable("Error in APInt::sqrt computation");
+ assert(this->ule(nextSquare) && "Error in APInt::sqrt computation");
+ APInt midpoint((nextSquare - square).udiv(two));
+ APInt offset(*this - square);
+ if (offset.ult(midpoint))
+ return x_old;
return x_old + 1;
}
/// division by a constant as a sequence of multiplies, adds and shifts.
/// Requires that the divisor not be 0. Taken from "Hacker's Delight", Henry
/// S. Warren, Jr., chapter 10.
-APInt::mu APInt::magicu() const {
+/// LeadingZeros can be used to simplify the calculation if the upper bits
+/// of the divided value are known zero.
+APInt::mu APInt::magicu(unsigned LeadingZeros) const {
const APInt& d = *this;
unsigned p;
APInt nc, delta, q1, r1, q2, r2;
struct mu magu;
magu.a = 0; // initialize "add" indicator
- APInt allOnes = APInt::getAllOnesValue(d.getBitWidth());
+ APInt allOnes = APInt::getAllOnesValue(d.getBitWidth()).lshr(LeadingZeros);
APInt signedMin = APInt::getSignedMinValue(d.getBitWidth());
APInt signedMax = APInt::getSignedMaxValue(d.getBitWidth());
return Res;
}
+APInt APInt::umul_ov(const APInt &RHS, bool &Overflow) const {
+ APInt Res = *this * RHS;
+
+ if (*this != 0 && RHS != 0)
+ Overflow = Res.udiv(RHS) != *this || Res.udiv(*this) != RHS;
+ else
+ Overflow = false;
+ return Res;
+}
+
APInt APInt::sshl_ov(unsigned ShAmt, bool &Overflow) const {
Overflow = ShAmt >= getBitWidth();
if (Overflow)
void APInt::fromString(unsigned numbits, StringRef str, uint8_t radix) {
// Check our assumptions here
assert(!str.empty() && "Invalid string length");
- assert((radix == 10 || radix == 8 || radix == 16 || radix == 2) &&
- "Radix should be 2, 8, 10, or 16!");
+ assert((radix == 10 || radix == 8 || radix == 16 || radix == 2 ||
+ radix == 36) &&
+ "Radix should be 2, 8, 10, 16, or 36!");
StringRef::iterator p = str.begin();
size_t slen = str.size();
}
void APInt::toString(SmallVectorImpl<char> &Str, unsigned Radix,
- bool Signed) const {
- assert((Radix == 10 || Radix == 8 || Radix == 16 || Radix == 2) &&
- "Radix should be 2, 8, 10, or 16!");
+ bool Signed, bool formatAsCLiteral) const {
+ assert((Radix == 10 || Radix == 8 || Radix == 16 || Radix == 2 ||
+ Radix == 36) &&
+ "Radix should be 2, 8, 10, 16, or 36!");
+
+ const char *Prefix = "";
+ if (formatAsCLiteral) {
+ switch (Radix) {
+ case 2:
+ // Binary literals are a non-standard extension added in gcc 4.3:
+ // http://gcc.gnu.org/onlinedocs/gcc-4.3.0/gcc/Binary-constants.html
+ Prefix = "0b";
+ break;
+ case 8:
+ Prefix = "0";
+ break;
+ case 10:
+ break; // No prefix
+ case 16:
+ Prefix = "0x";
+ break;
+ default:
+ llvm_unreachable("Invalid radix!");
+ }
+ }
// First, check for a zero value and just short circuit the logic below.
if (*this == 0) {
+ while (*Prefix) {
+ Str.push_back(*Prefix);
+ ++Prefix;
+ };
Str.push_back('0');
return;
}
- static const char Digits[] = "0123456789ABCDEF";
+ static const char Digits[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
if (isSingleWord()) {
char Buffer[65];
}
}
+ while (*Prefix) {
+ Str.push_back(*Prefix);
+ ++Prefix;
+ };
+
while (N) {
*--BufPtr = Digits[N % Radix];
N /= Radix;
Str.push_back('-');
}
+ while (*Prefix) {
+ Str.push_back(*Prefix);
+ ++Prefix;
+ };
+
// We insert the digits backward, then reverse them to get the right order.
unsigned StartDig = Str.size();
// For the 2, 8 and 16 bit cases, we can just shift instead of divide
// because the number of bits per digit (1, 3 and 4 respectively) divides
// equaly. We just shift until the value is zero.
- if (Radix != 10) {
+ if (Radix == 2 || Radix == 8 || Radix == 16) {
// Just shift tmp right for each digit width until it becomes zero
unsigned ShiftAmt = (Radix == 16 ? 4 : (Radix == 8 ? 3 : 1));
unsigned MaskAmt = Radix - 1;
Tmp = Tmp.lshr(ShiftAmt);
}
} else {
- APInt divisor(4, 10);
+ APInt divisor(Radix == 10? 4 : 8, Radix);
while (Tmp != 0) {
APInt APdigit(1, 0);
APInt tmp2(Tmp.getBitWidth(), 0);
/// to the methods above.
std::string APInt::toString(unsigned Radix = 10, bool Signed = true) const {
SmallString<40> S;
- toString(S, Radix, Signed);
+ toString(S, Radix, Signed, /* formatAsCLiteral = */false);
return S.str();
}
void APInt::print(raw_ostream &OS, bool isSigned) const {
SmallString<40> S;
- this->toString(S, 10, isSigned);
+ this->toString(S, 10, isSigned, /* formatAsCLiteral = */false);
OS << S.str();
}
projects / oota-llvm.git / blobdiff