APInt.cpp File Reference

#include "llvm/ADT/APInt.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/FoldingSet.h"
#include "llvm/ADT/Hashing.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/bit.h"
#include "llvm/Config/llvm-config.h"
#include "llvm/Support/Alignment.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/raw_ostream.h"
#include <cmath>
#include <optional>

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "apint"
#define	DEBUG_KNUTH(X)   do {} while(false)

Functions
static uint64_t *	getClearedMemory (unsigned numWords)
	A utility function for allocating memory, checking for allocation failures, and ensuring the contents are zeroed.
static uint64_t *	getMemory (unsigned numWords)
	A utility function for allocating memory and checking for allocation failure.
static unsigned	getDigit (char cdigit, uint8_t radix)
	A utility function that converts a character to a digit.
static void	tcComplement (APInt::WordType *dst, unsigned parts)
static unsigned	rotateModulo (unsigned BitWidth, const APInt &rotateAmt)
static void	KnuthDiv (uint32_t *u, uint32_t *v, uint32_t *q, uint32_t *r, unsigned m, unsigned n)
	Implementation of Knuth's Algorithm D (Division of nonnegative integers) from "Art of Computer Programming, Volume 2", section 4.3.1, p.
static APInt::WordType	lowBitMask (unsigned bits)
static APInt::WordType	lowHalf (APInt::WordType part)
	Returns the value of the lower half of PART.
static APInt::WordType	highHalf (APInt::WordType part)
	Returns the value of the upper half of PART.

Macro Definition Documentation

DEBUG_KNUTH

#define DEBUG_KNUTH

(

X

)

do {} while(false)

DEBUG_TYPE

#define DEBUG_TYPE   "apint"

Definition at line 32 of file APInt.cpp.

Function Documentation

getClearedMemory()

static uint64_t * getClearedMemory ( unsigned  numWords )

inlinestatic

A utility function for allocating memory, checking for allocation failures, and ensuring the contents are zeroed.

Definition at line 36 of file APInt.cpp.

getDigit()

static unsigned getDigit ( char  cdigit, uint8_t  radix  )

inlinestatic

A utility function that converts a character to a digit.

Definition at line 49 of file APInt.cpp.

getMemory()

static uint64_t * getMemory ( unsigned  numWords )

inlinestatic

A utility function for allocating memory and checking for allocation failure.

The content is not zeroed.

Definition at line 44 of file APInt.cpp.

Referenced by llvm::APInt::operator*(), llvm::APInt::sext(), llvm::APInt::trunc(), and llvm::APInt::zext().

highHalf()

static APInt::WordType highHalf ( APInt::WordType  part )

inlinestatic

Returns the value of the upper half of PART.

Definition at line 2304 of file APInt.cpp.

References llvm::APInt::APINT_BITS_PER_WORD.

Referenced by llvm::APInt::tcMultiplyPart().

KnuthDiv()

static void KnuthDiv ( uint32_t *  u, uint32_t *  v, uint32_t *  q, uint32_t *  r, unsigned  m, unsigned  n  )

static

Implementation of Knuth's Algorithm D (Division of nonnegative integers) from "Art of Computer Programming, Volume 2", section 4.3.1, p.

1. The variables here have the same names as in the algorithm. Comments explain the algorithm and any deviation from it.

Definition at line 1260 of file APInt.cpp.

References assert(), llvm::countl_zero(), llvm::dbgs(), DEBUG_KNUTH, llvm::Hi_32(), isNeg(), llvm::Lo_32(), and llvm::Make_64().

lowBitMask()

static APInt::WordType lowBitMask ( unsigned  bits )

inlinestatic

Definition at line 2293 of file APInt.cpp.

References llvm::APInt::APINT_BITS_PER_WORD, and assert().

Referenced by lowHalf(), and llvm::APInt::tcExtract().

lowHalf()

static APInt::WordType lowHalf ( APInt::WordType  part )

inlinestatic

Returns the value of the lower half of PART.

Definition at line 2299 of file APInt.cpp.

References llvm::APInt::APINT_BITS_PER_WORD, and lowBitMask().

Referenced by llvm::APInt::tcMultiplyPart().

rotateModulo()

static unsigned rotateModulo ( unsigned  BitWidth, const APInt &  rotateAmt  )

static

Definition at line 1093 of file APInt.cpp.

References llvm::BitWidth, llvm::APInt::getBitWidth(), llvm::APInt::getLimitedValue(), LLVM_UNLIKELY, llvm::APInt::urem(), and llvm::APInt::zext().

Referenced by llvm::APInt::rotl(), and llvm::APInt::rotr().

tcComplement()

static void tcComplement ( APInt::WordType *  dst, unsigned  parts  )

static

Definition at line 338 of file APInt.cpp.

Referenced by llvm::APInt::tcNegate().