//
// 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/Support/Debug.h"
#include "llvm/Support/MathExtras.h"
#include <math.h>
#include <limits>
#include <cstring>
#include <cstdlib>
-#ifndef NDEBUG
#include <iomanip>
-#endif
using namespace llvm;
+/// This enumeration just provides for internal constants used in this
+/// translation unit.
+enum {
+ MIN_INT_BITS = 1, ///< Minimum number of bits that can be specified
+ ///< Note that this must remain synchronized with IntegerType::MIN_INT_BITS
+ MAX_INT_BITS = (1<<23)-1 ///< Maximum number of bits that can be specified
+ ///< Note that this must remain synchronized with IntegerType::MAX_INT_BITS
+};
+
/// A utility function for allocating memory, checking for allocation failures,
/// and ensuring the contents are zeroed.
inline static uint64_t* getClearedMemory(uint32_t numWords) {
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");
+ assert(BitWidth >= MIN_INT_BITS && "bitwidth too small");
+ assert(BitWidth <= MAX_INT_BITS && "bitwidth too large");
if (isSingleWord())
VAL = val;
else {
clearUnusedBits();
}
-APInt::APInt(uint32_t numBits, uint32_t numWords, uint64_t bigVal[])
+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");
+ assert(BitWidth >= MIN_INT_BITS && "bitwidth too small");
+ assert(BitWidth <= MAX_INT_BITS && "bitwidth too large");
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 >= MIN_INT_BITS && "bitwidth too small");
+ assert(BitWidth <= MAX_INT_BITS && "bitwidth too large");
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(BitWidth >= MIN_INT_BITS && "bitwidth too small");
+ assert(BitWidth <= MAX_INT_BITS && "bitwidth too large");
assert(!Val.empty() && "String empty?");
- fromString(numbits, Val.c_str(), Val.size(), radix);
+ fromString(numbits, Val.c_str(), (uint32_t)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");
+ assert(BitWidth >= MIN_INT_BITS && "bitwidth too small");
+ assert(BitWidth <= MAX_INT_BITS && "bitwidth too large");
if (isSingleWord())
VAL = that.VAL;
else {
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.
uint32_t remainder = BitWidth % APINT_BITS_PER_WORD;
if (remainder)
Count -= APINT_BITS_PER_WORD - remainder;
- return Count;
+ return std::min(Count, BitWidth);
}
static uint32_t countLeadingOnes_64(uint64_t V, uint32_t skip) {
uint32_t APInt::countTrailingZeros() const {
if (isSingleWord())
- return CountTrailingZeros_64(VAL);
+ return std::min(uint32_t(CountTrailingZeros_64(VAL)), BitWidth);
uint32_t Count = 0;
uint32_t i = 0;
for (; i < getNumWords() && pVal[i] == 0; ++i)
Count += APINT_BITS_PER_WORD;
if (i < getNumWords())
Count += CountTrailingZeros_64(pVal[i]);
- return Count;
+ return std::min(Count, BitWidth);
+}
+
+uint32_t APInt::countTrailingOnes() const {
+ if (isSingleWord())
+ return std::min(uint32_t(CountTrailingOnes_64(VAL)), BitWidth);
+ 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::countPopulation() const {
// 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 >= MIN_INT_BITS && "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");
+ assert(width <= 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");
+ assert(width <= 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 {
return APInt(val, BitWidth).clearUnusedBits();
}
+/// Left-shift this APInt by shiftAmt.
+/// @brief Left-shift function.
+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));
+}
+
/// Left-shift this APInt by shiftAmt.
/// @brief Left-shift function.
APInt APInt::shl(uint32_t shiftAmt) const {
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;
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
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)
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) &&
"Radix should be 2, 8, 10, or 16!");
- static const char *digits[] = {
+ static const char *const digits[] = {
"0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F"
};
std::string result;
memset(buf, 0, 65);
uint64_t v = VAL;
while (bits_used) {
- uint32_t bit = v & 1;
+ uint32_t bit = (uint32_t)v & 1;
bits_used--;
buf[bits_used] = digits[bit][0];
v >>=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;
+ unsigned digit =
+ (unsigned)((tmp.isSingleWord() ? tmp.VAL : tmp.pVal[0]) & mask);
result.insert(insert_at, digits[digit]);
tmp = tmp.lshr(shift);
}
result = "-";
insert_at = 1;
}
- if (tmp == APInt(tmp.getBitWidth(), 0))
+ if (tmp == zero)
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();
+ uint32_t digit = (uint32_t)APdigit.getZExtValue();
assert(digit < radix && "divide failed");
result.insert(insert_at,digits[digit]);
tmp = tmp2;
return result;
}
-#ifndef NDEBUG
void APInt::dump() const
{
cerr << "APInt(" << BitWidth << ")=" << std::setbase(16);
cerr << pVal[i-1] << " ";
}
cerr << " U(" << this->toStringUnsigned(10) << ") S("
- << this->toStringSigned(10) << ")\n" << std::setbase(10);
+ << this->toStringSigned(10) << ")" << std::setbase(10);
}
-#endif
// This implements a variety of operations on a representation of
// arbitrary precision, two's-complement, bignum integer values.
/* 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);
return ~(integerPart) 0 >> (integerPartWidth - bits);
}
- /* Returns the value of the lower nibble of PART. */
- inline integerPart
+ /* Returns the value of the lower half of PART. */
+ static inline integerPart
lowHalf(integerPart part)
{
return part & lowBitMask(integerPartWidth / 2);
}
- /* Returns the value of the upper nibble of PART. */
- inline integerPart
+ /* Returns the value of the upper half of PART. */
+ static inline integerPart
highHalf(integerPart part)
{
return part >> (integerPartWidth / 2);
}
- /* Returns the bit number of the most significant bit of a part. If
- the input number has no bits set -1U is returned. */
- unsigned int
+ /* Returns the bit number of the most significant set bit of a part.
+ If the input number has no bits set -1U is returned. */
+ static unsigned int
partMSB(integerPart value)
{
unsigned int n, msb;
return msb;
}
- /* Returns the bit number of the least significant bit of a part.
- If the input number has no bits set -1U is returned. */
- unsigned int
+ /* Returns the bit number of the least significant set bit of a
+ part. If the input number has no bits set -1U is returned. */
+ static unsigned int
partLSB(integerPart value)
{
unsigned int n, lsb;
{
unsigned int i;
+ assert (parts > 0);
+
dst[0] = part;
for(i = 1; i < parts; i++)
dst[i] = 0;
parts[bit / integerPartWidth] |= (integerPart) 1 << (bit % integerPartWidth);
}
-/* Returns the bit number of the least significant bit of a number.
- If the input number has no bits set -1U is returned. */
+/* Returns the bit number of the least significant set bit of a
+ number. If the input number has no bits set -1U is returned. */
unsigned int
APInt::tcLSB(const integerPart *parts, unsigned int n)
{
return -1U;
}
-/* Returns the bit number of the most significant bit of a number. If
- the input number has no bits set -1U is returned. */
+/* Returns the bit number of the most significant set bit of a number.
+ If the input number has no bits set -1U is returned. */
unsigned int
APInt::tcMSB(const integerPart *parts, unsigned int n)
{
return -1U;
}
+/* Copy the bit vector of width srcBITS from SRC, starting at bit
+ srcLSB, to DST, of dstCOUNT parts, such that the bit srcLSB becomes
+ the least significant bit of DST. All high bits above srcBITS in
+ DST are zero-filled. */
+void
+APInt::tcExtract(integerPart *dst, unsigned int dstCount, const integerPart *src,
+ unsigned int srcBits, unsigned int srcLSB)
+{
+ unsigned int firstSrcPart, dstParts, shift, n;
+
+ dstParts = (srcBits + integerPartWidth - 1) / integerPartWidth;
+ assert (dstParts <= dstCount);
+
+ firstSrcPart = srcLSB / integerPartWidth;
+ tcAssign (dst, src + firstSrcPart, dstParts);
+
+ shift = srcLSB % integerPartWidth;
+ tcShiftRight (dst, dstParts, shift);
+
+ /* We now have (dstParts * integerPartWidth - shift) bits from SRC
+ in DST. If this is less that srcBits, append the rest, else
+ clear the high bits. */
+ n = dstParts * integerPartWidth - shift;
+ if (n < srcBits) {
+ integerPart mask = lowBitMask (srcBits - n);
+ dst[dstParts - 1] |= ((src[firstSrcPart + dstParts] & mask)
+ << n % integerPartWidth);
+ } else if (n > srcBits) {
+ if (srcBits % integerPartWidth)
+ dst[dstParts - 1] &= lowBitMask (srcBits % integerPartWidth);
+ }
+
+ /* Clear high parts. */
+ while (dstParts < dstCount)
+ dst[dstParts++] = 0;
+}
+
/* DST += RHS + C where C is zero or one. Returns the carry flag. */
integerPart
APInt::tcAdd(integerPart *dst, const integerPart *rhs,
tcIncrement(dst, parts);
}
-/* DST += SRC * MULTIPLIER + PART if add is true
- DST = SRC * MULTIPLIER + PART if add is false
+/* DST += SRC * MULTIPLIER + CARRY if add is true
+ DST = SRC * MULTIPLIER + CARRY if add is false
Requires 0 <= DSTPARTS <= SRCPARTS + 1. If DST overlaps SRC
they must start at the same point, i.e. DST == SRC.
return overflow;
}
-/* DST = LHS * RHS, where DST has twice the width as the operands. No
- overflow occurs. DST must be disjoint from both operands. */
-void
+/* DST = LHS * RHS, where DST has width the sum of the widths of the
+ operands. No overflow occurs. DST must be disjoint from both
+ operands. Returns the number of parts required to hold the
+ result. */
+unsigned int
APInt::tcFullMultiply(integerPart *dst, const integerPart *lhs,
- const integerPart *rhs, unsigned int parts)
+ const integerPart *rhs, unsigned int lhsParts,
+ unsigned int rhsParts)
{
- unsigned int i;
- int overflow;
+ /* Put the narrower number on the LHS for less loops below. */
+ if (lhsParts > rhsParts) {
+ return tcFullMultiply (dst, rhs, lhs, rhsParts, lhsParts);
+ } else {
+ unsigned int n;
- assert(dst != lhs && dst != rhs);
+ assert(dst != lhs && dst != rhs);
- overflow = 0;
- tcSet(dst, 0, parts);
+ tcSet(dst, 0, rhsParts);
- for(i = 0; i < parts; i++)
- overflow |= tcMultiplyPart(&dst[i], lhs, rhs[i], 0, parts,
- parts + 1, true);
+ for(n = 0; n < lhsParts; n++)
+ tcMultiplyPart(&dst[n], rhs, lhs[n], 0, rhsParts, rhsParts + 1, true);
+
+ n = lhsParts + rhsParts;
- assert(!overflow);
+ return n - (dst[n - 1] == 0);
+ }
}
/* If RHS is zero LHS and REMAINDER are left unchanged, return one.
void
APInt::tcShiftLeft(integerPart *dst, unsigned int parts, unsigned int count)
{
- unsigned int jump, shift;
+ if (count) {
+ unsigned int jump, shift;
- /* Jump is the inter-part jump; shift is is intra-part shift. */
- jump = count / integerPartWidth;
- shift = count % integerPartWidth;
+ /* Jump is the inter-part jump; shift is is intra-part shift. */
+ jump = count / integerPartWidth;
+ shift = count % integerPartWidth;
- while (parts > jump) {
- integerPart part;
+ while (parts > jump) {
+ integerPart part;
- parts--;
+ parts--;
- /* dst[i] comes from the two parts src[i - jump] and, if we have
- an intra-part shift, src[i - jump - 1]. */
- part = dst[parts - jump];
- if (shift) {
- part <<= shift;
+ /* dst[i] comes from the two parts src[i - jump] and, if we have
+ an intra-part shift, src[i - jump - 1]. */
+ part = dst[parts - jump];
+ if (shift) {
+ part <<= shift;
if (parts >= jump + 1)
part |= dst[parts - jump - 1] >> (integerPartWidth - shift);
}
- dst[parts] = part;
- }
+ dst[parts] = part;
+ }
- while (parts > 0)
- dst[--parts] = 0;
+ while (parts > 0)
+ dst[--parts] = 0;
+ }
}
/* Shift a bignum right COUNT bits in-place. Shifted in bits are
void
APInt::tcShiftRight(integerPart *dst, unsigned int parts, unsigned int count)
{
- unsigned int i, jump, shift;
+ if (count) {
+ unsigned int i, jump, shift;
- /* Jump is the inter-part jump; shift is is intra-part shift. */
- jump = count / integerPartWidth;
- shift = count % integerPartWidth;
+ /* Jump is the inter-part jump; shift is is intra-part shift. */
+ jump = count / integerPartWidth;
+ shift = count % integerPartWidth;
- /* Perform the shift. This leaves the most significant COUNT bits
- of the result at zero. */
- for(i = 0; i < parts; i++) {
- integerPart part;
+ /* Perform the shift. This leaves the most significant COUNT bits
+ of the result at zero. */
+ for(i = 0; i < parts; i++) {
+ integerPart part;
- if (i + jump >= parts) {
- part = 0;
- } else {
- part = dst[i + jump];
- if (shift) {
- part >>= shift;
- if (i + jump + 1 < parts)
- part |= dst[i + jump + 1] << (integerPartWidth - shift);
+ if (i + jump >= parts) {
+ part = 0;
+ } else {
+ part = dst[i + jump];
+ if (shift) {
+ part >>= shift;
+ if (i + jump + 1 < parts)
+ part |= dst[i + jump + 1] << (integerPartWidth - shift);
+ }
}
- }
- dst[i] = part;
+ dst[i] = part;
+ }
}
}
projects / oota-llvm.git / blobdiff