//
// The LLVM Compiler Infrastructure
//
-// This file was developed by Sheng Zhou and is distributed under the
-// University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
#define DEBUG_TYPE "apint"
#include "llvm/ADT/APInt.h"
-#include "llvm/DerivedTypes.h"
+#include "llvm/ADT/FoldingSet.h"
+#include "llvm/ADT/SmallString.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/MathExtras.h"
-#include <math.h>
+#include "llvm/Support/raw_ostream.h"
+#include <cmath>
#include <limits>
#include <cstring>
#include <cstdlib>
-#include <iomanip>
-
using namespace llvm;
/// A utility function for allocating memory, checking for allocation failures,
return result;
}
-APInt::APInt(uint32_t numBits, uint64_t val, bool isSigned)
- : BitWidth(numBits), VAL(0) {
- assert(BitWidth >= IntegerType::MIN_INT_BITS && "bitwidth too small");
- assert(BitWidth <= IntegerType::MAX_INT_BITS && "bitwidth too large");
- if (isSingleWord())
- VAL = val;
- else {
- pVal = getClearedMemory(getNumWords());
- pVal[0] = val;
- if (isSigned && int64_t(val) < 0)
- for (unsigned i = 1; i < getNumWords(); ++i)
- pVal[i] = -1ULL;
- }
- clearUnusedBits();
+void APInt::initSlowCase(uint32_t numBits, uint64_t val, bool isSigned) {
+ pVal = getClearedMemory(getNumWords());
+ pVal[0] = val;
+ if (isSigned && int64_t(val) < 0)
+ for (unsigned i = 1; i < getNumWords(); ++i)
+ pVal[i] = -1ULL;
}
+void APInt::initSlowCase(const APInt& that) {
+ pVal = getMemory(getNumWords());
+ memcpy(pVal, that.pVal, getNumWords() * APINT_WORD_SIZE);
+}
+
+
APInt::APInt(uint32_t numBits, uint32_t numWords, const uint64_t bigVal[])
- : BitWidth(numBits), VAL(0) {
- assert(BitWidth >= IntegerType::MIN_INT_BITS && "bitwidth too small");
- assert(BitWidth <= IntegerType::MAX_INT_BITS && "bitwidth too large");
+ : BitWidth(numBits), VAL(0) {
+ assert(BitWidth && "bitwidth too small");
assert(bigVal && "Null pointer detected!");
if (isSingleWord())
VAL = bigVal[0];
APInt::APInt(uint32_t numbits, const char StrStart[], uint32_t slen,
uint8_t radix)
: BitWidth(numbits), VAL(0) {
- assert(BitWidth >= IntegerType::MIN_INT_BITS && "bitwidth too small");
- assert(BitWidth <= IntegerType::MAX_INT_BITS && "bitwidth too large");
+ assert(BitWidth && "bitwidth too small");
fromString(numbits, StrStart, slen, radix);
}
-APInt::APInt(uint32_t numbits, const std::string& Val, uint8_t radix)
- : BitWidth(numbits), VAL(0) {
- assert(BitWidth >= IntegerType::MIN_INT_BITS && "bitwidth too small");
- assert(BitWidth <= IntegerType::MAX_INT_BITS && "bitwidth too large");
- assert(!Val.empty() && "String empty?");
- fromString(numbits, Val.c_str(), Val.size(), radix);
-}
-
-APInt::APInt(const APInt& that)
- : BitWidth(that.BitWidth), VAL(0) {
- assert(BitWidth >= IntegerType::MIN_INT_BITS && "bitwidth too small");
- assert(BitWidth <= IntegerType::MAX_INT_BITS && "bitwidth too large");
- if (isSingleWord())
- VAL = that.VAL;
- else {
- pVal = getMemory(getNumWords());
- memcpy(pVal, that.pVal, getNumWords() * APINT_WORD_SIZE);
- }
-}
-
-APInt::~APInt() {
- if (!isSingleWord() && pVal)
- delete [] pVal;
-}
-
-APInt& APInt::operator=(const APInt& RHS) {
+APInt& APInt::AssignSlowCase(const APInt& RHS) {
// Don't do anything for X = X
if (this == &RHS)
return *this;
- // If the bitwidths are the same, we can avoid mucking with memory
if (BitWidth == RHS.getBitWidth()) {
- if (isSingleWord())
- VAL = RHS.VAL;
- else
- memcpy(pVal, RHS.pVal, getNumWords() * APINT_WORD_SIZE);
+ // assume same bit-width single-word case is already handled
+ assert(!isSingleWord());
+ memcpy(pVal, RHS.pVal, getNumWords() * APINT_WORD_SIZE);
return *this;
}
- if (isSingleWord())
- if (RHS.isSingleWord())
- VAL = RHS.VAL;
- else {
- VAL = 0;
- pVal = getMemory(RHS.getNumWords());
- memcpy(pVal, RHS.pVal, RHS.getNumWords() * APINT_WORD_SIZE);
- }
- else if (getNumWords() == RHS.getNumWords())
+ if (isSingleWord()) {
+ // assume case where both are single words is already handled
+ assert(!RHS.isSingleWord());
+ VAL = 0;
+ pVal = getMemory(RHS.getNumWords());
+ memcpy(pVal, RHS.pVal, RHS.getNumWords() * APINT_WORD_SIZE);
+ } else if (getNumWords() == RHS.getNumWords())
memcpy(pVal, RHS.pVal, RHS.getNumWords() * APINT_WORD_SIZE);
else if (RHS.isSingleWord()) {
delete [] pVal;
return clearUnusedBits();
}
+/// Profile - This method 'profiles' an APInt for use with FoldingSet.
+void APInt::Profile(FoldingSetNodeID& ID) const {
+ ID.AddInteger(BitWidth);
+
+ if (isSingleWord()) {
+ ID.AddInteger(VAL);
+ return;
+ }
+
+ uint32_t NumWords = getNumWords();
+ for (unsigned i = 0; i < NumWords; ++i)
+ ID.AddInteger(pVal[i]);
+}
+
/// add_1 - This function adds a single "digit" integer, y, to the multiple
/// "digit" integer array, x[]. x[] is modified to reflect the addition and
/// 1 is returned if there is a carry out, otherwise 0 is returned.
return clearUnusedBits();
}
-APInt APInt::operator&(const APInt& RHS) const {
- assert(BitWidth == RHS.BitWidth && "Bit widths must be the same");
- if (isSingleWord())
- return APInt(getBitWidth(), VAL & RHS.VAL);
-
+APInt APInt::AndSlowCase(const APInt& RHS) const {
uint32_t numWords = getNumWords();
uint64_t* val = getMemory(numWords);
for (uint32_t i = 0; i < numWords; ++i)
return APInt(val, getBitWidth());
}
-APInt APInt::operator|(const APInt& RHS) const {
- assert(BitWidth == RHS.BitWidth && "Bit widths must be the same");
- if (isSingleWord())
- return APInt(getBitWidth(), VAL | RHS.VAL);
-
+APInt APInt::OrSlowCase(const APInt& RHS) const {
uint32_t numWords = getNumWords();
uint64_t *val = getMemory(numWords);
for (uint32_t i = 0; i < numWords; ++i)
return APInt(val, getBitWidth());
}
-APInt APInt::operator^(const APInt& RHS) const {
- assert(BitWidth == RHS.BitWidth && "Bit widths must be the same");
- if (isSingleWord())
- return APInt(BitWidth, VAL ^ RHS.VAL);
-
+APInt APInt::XorSlowCase(const APInt& RHS) const {
uint32_t numWords = getNumWords();
uint64_t *val = getMemory(numWords);
for (uint32_t i = 0; i < numWords; ++i)
(isSingleWord() ? VAL : pVal[whichWord(bitPosition)])) != 0;
}
-bool APInt::operator==(const APInt& RHS) const {
- assert(BitWidth == RHS.BitWidth && "Comparison requires equal bit widths");
- if (isSingleWord())
- return VAL == RHS.VAL;
-
+bool APInt::EqualSlowCase(const APInt& RHS) const {
// Get some facts about the number of bits used in the two operands.
uint32_t n1 = getActiveBits();
uint32_t n2 = RHS.getActiveBits();
return true;
}
-bool APInt::operator==(uint64_t Val) const {
- if (isSingleWord())
- return VAL == Val;
-
+bool APInt::EqualSlowCase(uint64_t Val) const {
uint32_t n = getActiveBits();
if (n <= APINT_BITS_PER_WORD)
return pVal[0] == Val;
return *this;
}
-APInt& APInt::set() {
- if (isSingleWord()) {
- VAL = -1ULL;
- return clearUnusedBits();
- }
-
- // Set all the bits in all the words.
- for (uint32_t i = 0; i < getNumWords(); ++i)
- pVal[i] = -1ULL;
- // Clear the unused ones
- return clearUnusedBits();
-}
-
/// Set the given bit to 0 whose position is given as "bitPosition".
/// @brief Set a given bit to 0.
APInt& APInt::clear(uint32_t bitPosition) {
return *this;
}
-/// @brief Set every bit to 0.
-APInt& APInt::clear() {
- if (isSingleWord())
- VAL = 0;
- else
- memset(pVal, 0, getNumWords() * APINT_WORD_SIZE);
- return *this;
-}
-
-/// @brief Bitwise NOT operator. Performs a bitwise logical NOT operation on
-/// this APInt.
-APInt APInt::operator~() const {
- APInt Result(*this);
- Result.flip();
- return Result;
-}
-
/// @brief Toggle every bit to its opposite value.
-APInt& APInt::flip() {
- if (isSingleWord()) {
- VAL ^= -1ULL;
- return clearUnusedBits();
- }
- for (uint32_t i = 0; i < getNumWords(); ++i)
- pVal[i] ^= -1ULL;
- return clearUnusedBits();
-}
/// Toggle a given bit to its opposite value whose position is given
/// as "bitPosition".
return (!!*this) && !(*this & (*this - APInt(BitWidth,1)));
}
-uint32_t APInt::countLeadingZeros() const {
+uint32_t APInt::countLeadingZerosSlowCase() const {
uint32_t Count = 0;
- if (isSingleWord())
- Count = CountLeadingZeros_64(VAL);
- else {
- for (uint32_t i = getNumWords(); i > 0u; --i) {
- if (pVal[i-1] == 0)
- Count += APINT_BITS_PER_WORD;
- else {
- Count += CountLeadingZeros_64(pVal[i-1]);
- break;
- }
+ for (uint32_t i = getNumWords(); i > 0u; --i) {
+ if (pVal[i-1] == 0)
+ Count += APINT_BITS_PER_WORD;
+ else {
+ Count += CountLeadingZeros_64(pVal[i-1]);
+ break;
}
}
uint32_t remainder = BitWidth % APINT_BITS_PER_WORD;
uint32_t APInt::countTrailingZeros() const {
if (isSingleWord())
- return std::min(CountTrailingZeros_64(VAL), BitWidth);
+ return std::min(uint32_t(CountTrailingZeros_64(VAL)), BitWidth);
uint32_t Count = 0;
uint32_t i = 0;
for (; i < getNumWords() && pVal[i] == 0; ++i)
return std::min(Count, BitWidth);
}
-uint32_t APInt::countPopulation() const {
- if (isSingleWord())
- return CountPopulation_64(VAL);
+uint32_t APInt::countTrailingOnesSlowCase() const {
+ uint32_t Count = 0;
+ uint32_t i = 0;
+ for (; i < getNumWords() && pVal[i] == -1ULL; ++i)
+ Count += APINT_BITS_PER_WORD;
+ if (i < getNumWords())
+ Count += CountTrailingOnes_64(pVal[i]);
+ return std::min(Count, BitWidth);
+}
+
+uint32_t APInt::countPopulationSlowCase() const {
uint32_t Count = 0;
for (uint32_t i = 0; i < getNumWords(); ++i)
Count += CountPopulation_64(pVal[i]);
// Otherwise, we have to shift the mantissa bits up to the right location
APInt Tmp(width, mantissa);
- Tmp = Tmp.shl(exp - 52);
+ Tmp = Tmp.shl((uint32_t)exp - 52);
return isNeg ? -Tmp : Tmp;
}
// Truncate to new width.
APInt &APInt::trunc(uint32_t width) {
assert(width < BitWidth && "Invalid APInt Truncate request");
- assert(width >= IntegerType::MIN_INT_BITS && "Can't truncate to 0 bits");
+ assert(width && "Can't truncate to 0 bits");
uint32_t wordsBefore = getNumWords();
BitWidth = width;
uint32_t wordsAfter = getNumWords();
// Sign extend to a new width.
APInt &APInt::sext(uint32_t width) {
assert(width > BitWidth && "Invalid APInt SignExtend request");
- assert(width <= IntegerType::MAX_INT_BITS && "Too many bits");
// If the sign bit isn't set, this is the same as zext.
if (!isNegative()) {
zext(width);
// Zero extend to a new width.
APInt &APInt::zext(uint32_t width) {
assert(width > BitWidth && "Invalid APInt ZeroExtend request");
- assert(width <= IntegerType::MAX_INT_BITS && "Too many bits");
uint32_t wordsBefore = getNumWords();
BitWidth = width;
uint32_t wordsAfter = getNumWords();
return *this;
}
+/// Arithmetic right-shift this APInt by shiftAmt.
+/// @brief Arithmetic right-shift function.
+APInt APInt::ashr(const APInt &shiftAmt) const {
+ return ashr((uint32_t)shiftAmt.getLimitedValue(BitWidth));
+}
+
/// Arithmetic right-shift this APInt by shiftAmt.
/// @brief Arithmetic right-shift function.
APInt APInt::ashr(uint32_t shiftAmt) const {
// issues in the algorithm below.
if (shiftAmt == BitWidth) {
if (isNegative())
- return APInt(BitWidth, -1ULL);
+ return APInt(BitWidth, -1ULL, true);
else
return APInt(BitWidth, 0);
}
return APInt(val, BitWidth).clearUnusedBits();
}
+/// Logical right-shift this APInt by shiftAmt.
+/// @brief Logical right-shift function.
+APInt APInt::lshr(const APInt &shiftAmt) const {
+ return lshr((uint32_t)shiftAmt.getLimitedValue(BitWidth));
+}
+
/// Logical right-shift this APInt by shiftAmt.
/// @brief Logical right-shift function.
APInt APInt::lshr(uint32_t shiftAmt) const {
/// Left-shift this APInt by shiftAmt.
/// @brief Left-shift function.
-APInt APInt::shl(uint32_t shiftAmt) const {
- assert(shiftAmt <= BitWidth && "Invalid shift amount");
- if (isSingleWord()) {
- if (shiftAmt == BitWidth)
- return APInt(BitWidth, 0); // avoid undefined shift results
- return APInt(BitWidth, VAL << shiftAmt);
- }
+APInt APInt::shl(const APInt &shiftAmt) const {
+ // It's undefined behavior in C to shift by BitWidth or greater, but
+ return shl((uint32_t)shiftAmt.getLimitedValue(BitWidth));
+}
+APInt APInt::shlSlowCase(uint32_t shiftAmt) const {
// If all the bits were shifted out, the result is 0. This avoids issues
// with shifting by the size of the integer type, which produces undefined
// results. We define these "undefined results" to always be 0.
return APInt(val, BitWidth).clearUnusedBits();
}
+APInt APInt::rotl(const APInt &rotateAmt) const {
+ return rotl((uint32_t)rotateAmt.getLimitedValue(BitWidth));
+}
+
APInt APInt::rotl(uint32_t rotateAmt) const {
if (rotateAmt == 0)
return *this;
return hi | lo;
}
+APInt APInt::rotr(const APInt &rotateAmt) const {
+ return rotr((uint32_t)rotateAmt.getLimitedValue(BitWidth));
+}
+
APInt APInt::rotr(uint32_t rotateAmt) const {
if (rotateAmt == 0)
return *this;
return x_old + 1;
}
+/// Computes the multiplicative inverse of this APInt for a given modulo. The
+/// iterative extended Euclidean algorithm is used to solve for this value,
+/// however we simplify it to speed up calculating only the inverse, and take
+/// advantage of div+rem calculations. We also use some tricks to avoid copying
+/// (potentially large) APInts around.
+APInt APInt::multiplicativeInverse(const APInt& modulo) const {
+ assert(ult(modulo) && "This APInt must be smaller than the modulo");
+
+ // Using the properties listed at the following web page (accessed 06/21/08):
+ // http://www.numbertheory.org/php/euclid.html
+ // (especially the properties numbered 3, 4 and 9) it can be proved that
+ // BitWidth bits suffice for all the computations in the algorithm implemented
+ // below. More precisely, this number of bits suffice if the multiplicative
+ // inverse exists, but may not suffice for the general extended Euclidean
+ // algorithm.
+
+ APInt r[2] = { modulo, *this };
+ APInt t[2] = { APInt(BitWidth, 0), APInt(BitWidth, 1) };
+ APInt q(BitWidth, 0);
+
+ unsigned i;
+ for (i = 0; r[i^1] != 0; i ^= 1) {
+ // An overview of the math without the confusing bit-flipping:
+ // q = r[i-2] / r[i-1]
+ // r[i] = r[i-2] % r[i-1]
+ // t[i] = t[i-2] - t[i-1] * q
+ udivrem(r[i], r[i^1], q, r[i]);
+ t[i] -= t[i^1] * q;
+ }
+
+ // If this APInt and the modulo are not coprime, there is no multiplicative
+ // inverse, so return 0. We check this by looking at the next-to-last
+ // remainder, which is the gcd(*this,modulo) as calculated by the Euclidean
+ // algorithm.
+ if (r[i] != 1)
+ return APInt(BitWidth, 0);
+
+ // The next-to-last t is the multiplicative inverse. However, we are
+ // interested in a positive inverse. Calcuate a positive one from a negative
+ // one if necessary. A simple addition of the modulo suffices because
+ // abs(t[i]) is known to be less than *this/2 (see the link above).
+ return t[i].isNegative() ? t[i] + modulo : t[i];
+}
+
/// Implementation of Knuth's Algorithm D (Division of nonnegative integers)
/// from "Art of Computer Programming, Volume 2", section 4.3.1, p. 272. The
/// variables here have the same names as in the algorithm. Comments explain
// is 2^31 so we just set it to -1u.
uint64_t b = uint64_t(1) << 32;
+#if 0
DEBUG(cerr << "KnuthDiv: m=" << m << " n=" << n << '\n');
DEBUG(cerr << "KnuthDiv: original:");
DEBUG(for (int i = m+n; i >=0; i--) cerr << " " << std::setbase(16) << u[i]);
DEBUG(cerr << " by");
DEBUG(for (int i = n; i >0; i--) cerr << " " << std::setbase(16) << v[i-1]);
DEBUG(cerr << '\n');
+#endif
// D1. [Normalize.] Set d = b / (v[n-1] + 1) and multiply all the digits of
// u and v by d. Note that we have taken Knuth's advice here to use a power
// of 2 value for d such that d * v[n-1] >= b/2 (b is the base). A power of
}
}
u[m+n] = u_carry;
+#if 0
DEBUG(cerr << "KnuthDiv: normal:");
DEBUG(for (int i = m+n; i >=0; i--) cerr << " " << std::setbase(16) << u[i]);
DEBUG(cerr << " by");
DEBUG(for (int i = n; i >0; i--) cerr << " " << std::setbase(16) << v[i-1]);
DEBUG(cerr << '\n');
+#endif
// D2. [Initialize j.] Set j to m. This is the loop counter over the places.
int j = m;
uint64_t result = u_tmp - subtrahend;
uint32_t k = j + i;
- u[k++] = result & (b-1); // subtract low word
- u[k++] = result >> 32; // subtract high word
+ u[k++] = (uint32_t)(result & (b-1)); // subtract low word
+ u[k++] = (uint32_t)(result >> 32); // subtract high word
while (borrow && k <= m+n) { // deal with borrow to the left
borrow = u[k] == 0;
u[k]--;
// D5. [Test remainder.] Set q[j] = qp. If the result of step D4 was
// negative, go to step D6; otherwise go on to step D7.
- q[j] = qp;
+ q[j] = (uint32_t)qp;
if (isNeg) {
// D6. [Add back]. The probability that this step is necessary is very
// small, on the order of only 2/b. Make sure that test data accounts for
}
DEBUG(cerr << '\n');
}
+#if 0
DEBUG(cerr << std::setbase(10) << '\n');
+#endif
}
void APInt::divide(const APInt LHS, uint32_t lhsWords,
memset(U, 0, (m+n+1)*sizeof(uint32_t));
for (unsigned i = 0; i < lhsWords; ++i) {
uint64_t tmp = (LHS.getNumWords() == 1 ? LHS.VAL : LHS.pVal[i]);
- U[i * 2] = tmp & mask;
- U[i * 2 + 1] = tmp >> (sizeof(uint32_t)*8);
+ U[i * 2] = (uint32_t)(tmp & mask);
+ U[i * 2 + 1] = (uint32_t)(tmp >> (sizeof(uint32_t)*8));
}
U[m+n] = 0; // this extra word is for "spill" in the Knuth algorithm.
memset(V, 0, (n)*sizeof(uint32_t));
for (unsigned i = 0; i < rhsWords; ++i) {
uint64_t tmp = (RHS.getNumWords() == 1 ? RHS.VAL : RHS.pVal[i]);
- V[i * 2] = tmp & mask;
- V[i * 2 + 1] = tmp >> (sizeof(uint32_t)*8);
+ V[i * 2] = (uint32_t)(tmp & mask);
+ V[i * 2 + 1] = (uint32_t)(tmp >> (sizeof(uint32_t)*8));
}
// initialize the quotient and remainder
remainder = 0;
} else if (partial_dividend < divisor) {
Q[i] = 0;
- remainder = partial_dividend;
+ remainder = (uint32_t)partial_dividend;
} else if (partial_dividend == divisor) {
Q[i] = 1;
remainder = 0;
} else {
- Q[i] = partial_dividend / divisor;
- remainder = partial_dividend - (Q[i] * divisor);
+ Q[i] = (uint32_t)(partial_dividend / divisor);
+ remainder = (uint32_t)(partial_dividend - (Q[i] * divisor));
}
}
if (R)
if (lhsWords == 1 && rhsWords == 1) {
// There is only one word to consider so use the native versions.
- if (LHS.isSingleWord()) {
- Quotient = APInt(LHS.getBitWidth(), LHS.VAL / RHS.VAL);
- Remainder = APInt(LHS.getBitWidth(), LHS.VAL % RHS.VAL);
- } else {
- Quotient = APInt(LHS.getBitWidth(), LHS.pVal[0] / RHS.pVal[0]);
- Remainder = APInt(LHS.getBitWidth(), LHS.pVal[0] % RHS.pVal[0]);
- }
+ uint64_t lhsValue = LHS.isSingleWord() ? LHS.VAL : LHS.pVal[0];
+ uint64_t rhsValue = RHS.isSingleWord() ? RHS.VAL : RHS.pVal[0];
+ Quotient = APInt(LHS.getBitWidth(), lhsValue / rhsValue);
+ Remainder = APInt(LHS.getBitWidth(), lhsValue % rhsValue);
return;
}
assert(0 && "huh? we shouldn't get here");
} else if (isdigit(cdigit)) {
digit = cdigit - '0';
+ assert((radix == 10 ||
+ (radix == 8 && digit != 8 && digit != 9) ||
+ (radix == 2 && (digit == 0 || digit == 1))) &&
+ "Invalid digit in string for given radix");
} else {
assert(0 && "Invalid character in digit string");
}
}
}
-std::string APInt::toString(uint8_t radix, bool wantSigned) const {
- assert((radix == 10 || radix == 8 || radix == 16 || radix == 2) &&
+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!");
- static const char *digits[] = {
- "0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F"
- };
- std::string result;
- uint32_t bits_used = getActiveBits();
+
+ // First, check for a zero value and just short circuit the logic below.
+ if (*this == 0) {
+ Str.push_back('0');
+ return;
+ }
+
+ static const char Digits[] = "0123456789ABCDEF";
+
if (isSingleWord()) {
- char buf[65];
- const char *format = (radix == 10 ? (wantSigned ? "%lld" : "%llu") :
- (radix == 16 ? "%llX" : (radix == 8 ? "%llo" : 0)));
- if (format) {
- if (wantSigned) {
- int64_t sextVal = (int64_t(VAL) << (APINT_BITS_PER_WORD-BitWidth)) >>
- (APINT_BITS_PER_WORD-BitWidth);
- sprintf(buf, format, sextVal);
- } else
- sprintf(buf, format, VAL);
- } else {
- memset(buf, 0, 65);
- uint64_t v = VAL;
- while (bits_used) {
- uint32_t bit = v & 1;
- bits_used--;
- buf[bits_used] = digits[bit][0];
- v >>=1;
+ char Buffer[65];
+ char *BufPtr = Buffer+65;
+
+ uint64_t N;
+ if (Signed) {
+ int64_t I = getSExtValue();
+ if (I < 0) {
+ Str.push_back('-');
+ I = -I;
}
+ N = I;
+ } else {
+ N = getZExtValue();
}
- result = buf;
- return result;
- }
-
- if (radix != 10) {
- // 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 there value is zero.
-
- // First, check for a zero value and just short circuit the logic below.
- if (*this == 0)
- result = "0";
- else {
- APInt tmp(*this);
- size_t insert_at = 0;
- if (wantSigned && this->isNegative()) {
- // They want to print the signed version and it is a negative value
- // Flip the bits and add one to turn it into the equivalent positive
- // value and put a '-' in the result.
- tmp.flip();
- tmp++;
- result = "-";
- insert_at = 1;
- }
- // Just shift tmp right for each digit width until it becomes zero
- uint32_t shift = (radix == 16 ? 4 : (radix == 8 ? 3 : 1));
- uint64_t mask = radix - 1;
- APInt zero(tmp.getBitWidth(), 0);
- while (tmp.ne(zero)) {
- unsigned digit = (tmp.isSingleWord() ? tmp.VAL : tmp.pVal[0]) & mask;
- result.insert(insert_at, digits[digit]);
- tmp = tmp.lshr(shift);
- }
+
+ while (N) {
+ *--BufPtr = Digits[N % Radix];
+ N /= Radix;
}
- return result;
+ Str.append(BufPtr, Buffer+65);
+ return;
}
- APInt tmp(*this);
- APInt divisor(4, radix);
- APInt zero(tmp.getBitWidth(), 0);
- size_t insert_at = 0;
- if (wantSigned && tmp[BitWidth-1]) {
+ APInt Tmp(*this);
+
+ if (Signed && isNegative()) {
// They want to print the signed version and it is a negative value
// Flip the bits and add one to turn it into the equivalent positive
// value and put a '-' in the result.
- tmp.flip();
- tmp++;
- result = "-";
- insert_at = 1;
- }
- if (tmp == APInt(tmp.getBitWidth(), 0))
- result = "0";
- else while (tmp.ne(zero)) {
- APInt APdigit(1,0);
- APInt tmp2(tmp.getBitWidth(), 0);
- divide(tmp, tmp.getNumWords(), divisor, divisor.getNumWords(), &tmp2,
- &APdigit);
- uint32_t digit = APdigit.getZExtValue();
- assert(digit < radix && "divide failed");
- result.insert(insert_at,digits[digit]);
- tmp = tmp2;
+ Tmp.flip();
+ Tmp++;
+ Str.push_back('-');
+ }
+
+ // 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) {
+ // 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;
+
+ while (Tmp != 0) {
+ unsigned Digit = unsigned(Tmp.getRawData()[0]) & MaskAmt;
+ Str.push_back(Digits[Digit]);
+ Tmp = Tmp.lshr(ShiftAmt);
+ }
+ } else {
+ APInt divisor(4, 10);
+ while (Tmp != 0) {
+ APInt APdigit(1, 0);
+ APInt tmp2(Tmp.getBitWidth(), 0);
+ divide(Tmp, Tmp.getNumWords(), divisor, divisor.getNumWords(), &tmp2,
+ &APdigit);
+ uint32_t Digit = (uint32_t)APdigit.getZExtValue();
+ assert(Digit < Radix && "divide failed");
+ Str.push_back(Digits[Digit]);
+ Tmp = tmp2;
+ }
}
+
+ // Reverse the digits before returning.
+ std::reverse(Str.begin()+StartDig, Str.end());
+}
- return result;
+/// toString - This returns the APInt as a std::string. Note that this is an
+/// inefficient method. It is better to pass in a SmallVector/SmallString
+/// to the methods above.
+std::string APInt::toString(unsigned Radix = 10, bool Signed = true) const {
+ SmallString<40> S;
+ toString(S, Radix, Signed);
+ return S.c_str();
}
-void APInt::dump() const
-{
- cerr << "APInt(" << BitWidth << ")=" << std::setbase(16);
- if (isSingleWord())
- cerr << VAL;
- else for (unsigned i = getNumWords(); i > 0; i--) {
- cerr << pVal[i-1] << " ";
- }
- cerr << " U(" << this->toStringUnsigned(10) << ") S("
- << this->toStringSigned(10) << ")" << std::setbase(10);
+
+void APInt::dump() const {
+ SmallString<40> S, U;
+ this->toStringUnsigned(U);
+ this->toStringSigned(S);
+ fprintf(stderr, "APInt(%db, %su %ss)", BitWidth, U.c_str(), S.c_str());
+}
+
+void APInt::print(raw_ostream &OS, bool isSigned) const {
+ SmallString<40> S;
+ this->toString(S, 10, isSigned);
+ OS << S.c_str();
}
// This implements a variety of operations on a representation of
/* Assumed by lowHalf, highHalf, partMSB and partLSB. A fairly safe
and unrestricting assumption. */
+#define COMPILE_TIME_ASSERT(cond) extern int CTAssert[(cond) ? 1 : -1]
COMPILE_TIME_ASSERT(integerPartWidth % 2 == 0);
/* Some handy functions local to this file. */
/* Returns the integer part with the least significant BITS set.
BITS cannot be zero. */
- inline integerPart
+ static inline integerPart
lowBitMask(unsigned int bits)
{
assert (bits != 0 && bits <= integerPartWidth);
}
/* Returns the value of the lower half of PART. */
- inline integerPart
+ static inline integerPart
lowHalf(integerPart part)
{
return part & lowBitMask(integerPartWidth / 2);
}
/* Returns the value of the upper half of PART. */
- inline integerPart
+ static inline integerPart
highHalf(integerPart part)
{
return part >> (integerPartWidth / 2);
/* Returns the bit number of the most significant set bit of a part.
If the input number has no bits set -1U is returned. */
- unsigned int
+ static unsigned int
partMSB(integerPart value)
{
unsigned int n, msb;
/* Returns the bit number of the least significant set bit of a
part. If the input number has no bits set -1U is returned. */
- unsigned int
+ static unsigned int
partLSB(integerPart value)
{
unsigned int n, lsb;
projects / oota-llvm.git / blobdiff