//===-- Execution.cpp - Implement code to simulate the program ------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the actual instruction interpreter.
//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "interpreter"
#include "Interpreter.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Instructions.h"
#include "llvm/ParameterAttributes.h"
#include "llvm/CodeGen/IntrinsicLowering.h"
#include "llvm/Support/GetElementPtrTypeIterator.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/MathExtras.h"
#include <cmath>
#include <algorithm>
using namespace llvm;
STATISTIC(NumDynamicInsts, "Number of dynamic instructions executed");
static Interpreter *TheEE = 0;
//===----------------------------------------------------------------------===//
// Various Helper Functions
//===----------------------------------------------------------------------===//
static inline uint64_t doSignExtension(uint64_t Val, const IntegerType* ITy) {
// Determine if the value is signed or not
bool isSigned = (Val & (1 << (ITy->getBitWidth()-1))) != 0;
// If its signed, extend the sign bits
if (isSigned)
Val |= ~ITy->getBitMask();
return Val;
}
static void SetValue(Value *V, GenericValue Val, ExecutionContext &SF) {
SF.Values[V] = Val;
}
void Interpreter::initializeExecutionEngine() {
TheEE = this;
}
//===----------------------------------------------------------------------===//
// Binary Instruction Implementations
//===----------------------------------------------------------------------===//
#define IMPLEMENT_BINARY_OPERATOR(OP, TY) \
case Type::TY##TyID: \
Dest.TY##Val = Src1.TY##Val OP Src2.TY##Val; \
break
#define IMPLEMENT_INTEGER_BINOP1(OP, TY) \
case Type::IntegerTyID: { \
