LLVM  6.0.0svn
Macros | Functions
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/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/raw_ostream.h"
#include <climits>
#include <cmath>
#include <cstdlib>
#include <cstring>
Include dependency graph for APInt.cpp:

Go to the source code of this file.

Macros

#define DEBUG_TYPE   "apint"
 

Functions

static uint64_t * getClearedMemory (unsigned numWords)
 A utility function for allocating memory, checking for allocation failures, and ensuring the contents are zeroed. More...
 
static uint64_t * getMemory (unsigned numWords)
 A utility function for allocating memory and checking for allocation failure. More...
 
static unsigned getDigit (char cdigit, uint8_t radix)
 A utility function that converts a character to a digit. More...
 
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. More...
 
static APInt::WordType lowBitMask (unsigned bits)
 
static APInt::WordType lowHalf (APInt::WordType part)
 
static APInt::WordType highHalf (APInt::WordType part)
 
static unsigned partMSB (APInt::WordType value)
 
static unsigned partLSB (APInt::WordType value)
 

Macro Definition Documentation

◆ DEBUG_TYPE

#define DEBUG_TYPE   "apint"

Definition at line 31 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 35 of file APInt.cpp.

References assert().

Referenced by getDigit(), and llvm::APInt::ushl_ov().

◆ getDigit()

static unsigned getDigit ( char  cdigit,
uint8_t  radix 
)
inlinestatic

◆ 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.

References assert().

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

◆ highHalf()

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

Definition at line 2163 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 1244 of file APInt.cpp.

References assert(), llvm::APInt::countLeadingZeros(), llvm::dbgs(), DEBUG, llvm::Hi_32(), llvm::Lo_32(), llvm::Make_64(), llvm::RISCVFenceField::R, and remainder.

◆ lowBitMask()

static APInt::WordType lowBitMask ( unsigned  bits)
inlinestatic

Definition at line 2151 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

Definition at line 2158 of file APInt.cpp.

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

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

◆ partLSB()

static unsigned partLSB ( APInt::WordType  value)
static

Definition at line 2175 of file APInt.cpp.

References llvm::findFirstSet(), and llvm::ZB_Max.

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

◆ partMSB()

static unsigned partMSB ( APInt::WordType  value)
static

Definition at line 2169 of file APInt.cpp.

References llvm::findLastSet(), and llvm::ZB_Max.

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

◆ rotateModulo()

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