urho3d/ThirdParty/AngelScript/source/as_context.cpp

/*
   AngelCode Scripting Library
   Copyright (c) 2003-2012 Andreas Jonsson

   This software is provided 'as-is', without any express or implied
   warranty. In no event will the authors be held liable for any
   damages arising from the use of this software.

   Permission is granted to anyone to use this software for any
   purpose, including commercial applications, and to alter it and
   redistribute it freely, subject to the following restrictions:

   1. The origin of this software must not be misrepresented; you
      must not claim that you wrote the original software. If you use
      this software in a product, an acknowledgment in the product
      documentation would be appreciated but is not required.

   2. Altered source versions must be plainly marked as such, and
      must not be misrepresented as being the original software.

   3. This notice may not be removed or altered from any source
      distribution.

   The original version of this library can be located at:
   http://www.angelcode.com/angelscript/

   Andreas Jonsson
   [email protected]
*/


//
// as_context.cpp
//
// This class handles the execution of the byte code
//

#include <math.h> // fmodf()

#include "as_config.h"
#include "as_context.h"
#include "as_scriptengine.h"
#include "as_tokendef.h"
#include "as_texts.h"
#include "as_callfunc.h"
#include "as_generic.h"
#include "as_debug.h" // mkdir()
#include "as_bytecode.h"
#include "as_scriptobject.h"

#ifdef _MSC_VER
#pragma warning(disable:4702) // unreachable code
#endif

BEGIN_AS_NAMESPACE

// We need at least 2 DWORDs reserved for exception handling
// We need at least 1 DWORD reserved for calling system functions
const int RESERVE_STACK = 2*AS_PTR_SIZE;

// For each script function call we push 5 DWORDs on the call stack
const int CALLSTACK_FRAME_SIZE = 5;


#if defined(AS_DEBUG)

class asCDebugStats
{
public:
	asCDebugStats()
	{
		memset(instrCount, 0, sizeof(instrCount));
		memset(instrCount2, 0, sizeof(instrCount2));
		lastBC = 255;
	}

	~asCDebugStats()
	{
		// This code writes out some statistics for the VM. 
		// It's useful for determining what needs to be optimized.

		_mkdir("AS_DEBUG");
		#if _MSC_VER >= 1500 
			FILE *f;
			fopen_s(&f, "AS_DEBUG/stats.txt", "wt");
		#else
			FILE *f = fopen("AS_DEBUG/stats.txt", "wt");
		#endif
		if( f )
		{
			// Output instruction statistics
			fprintf(f, "\nTotal count\n");
			int n;
			for( n = 0; n < asBC_MAXBYTECODE; n++ )
			{
				if( asBCInfo[n].name && instrCount[n] > 0 )
					fprintf(f, "%-10.10s : %.0f\n", asBCInfo[n].name, instrCount[n]);
			}

			fprintf(f, "\nNever executed\n");
			for( n = 0; n < asBC_MAXBYTECODE; n++ )
			{
				if( asBCInfo[n].name && instrCount[n] == 0 )
					fprintf(f, "%-10.10s\n", asBCInfo[n].name);
			}

			fprintf(f, "\nSequences\n");
			for( n = 0; n < 256; n++ )
			{
				if( asBCInfo[n].name )
				{
					for( int m = 0; m < 256; m++ )
					{
						if( instrCount2[n][m] )
							fprintf(f, "%-10.10s, %-10.10s : %.0f\n", asBCInfo[n].name, asBCInfo[m].name, instrCount2[n][m]);
					}
				}
			}
			fclose(f);
		}
	}

	void Instr(asBYTE bc)
	{
		++instrCount[bc];
		++instrCount2[lastBC][bc];
		lastBC = bc;
	}

	// Instruction statistics
	double instrCount[256];
	double instrCount2[256][256];
	int lastBC;
} stats;

#endif

AS_API asIScriptContext *asGetActiveContext()
{
	asCThreadLocalData *tld = asCThreadManager::GetLocalData();
	if( tld->activeContexts.GetLength() == 0 )
		return 0;
	return tld->activeContexts[tld->activeContexts.GetLength()-1];
}

void asPushActiveContext(asIScriptContext *ctx)
{
	asCThreadLocalData *tld = asCThreadManager::GetLocalData();
	tld->activeContexts.PushLast(ctx);
}

void asPopActiveContext(asIScriptContext *ctx)
{
	asCThreadLocalData *tld = asCThreadManager::GetLocalData();

	asASSERT(tld->activeContexts.GetLength() > 0);
	asASSERT(tld->activeContexts[tld->activeContexts.GetLength()-1] == ctx);
	UNUSED_VAR(ctx);

	tld->activeContexts.PopLast();
}

asCContext::asCContext(asCScriptEngine *engine, bool holdRef)
{
	holdEngineRef = holdRef;
	if( holdRef )
		engine->AddRef();
	this->engine = engine;

	status = asEXECUTION_UNINITIALIZED;
	stackBlockSize = 0;
	refCount.set(1);
	inExceptionHandler = false;
	isStackMemoryNotAllocated = false;

	currentFunction = 0;
	callingSystemFunction = 0;
	regs.objectRegister = 0;
	initialFunction = 0;

	lineCallback = false;
	exceptionCallback = false;

	regs.doProcessSuspend = false;
	doSuspend = false;

	userData = 0;

	regs.ctx = this;
}

asCContext::~asCContext()
{
	DetachEngine();
}

int asCContext::AddRef() const
{
	return refCount.atomicInc();
}

int asCContext::Release() const
{
	int r = refCount.atomicDec();

	if( r == 0 )
	{
		asDELETE(const_cast<asCContext*>(this),asCContext);
		return 0;
	}

	return r;
}

void asCContext::DetachEngine()
{
	if( engine == 0 ) return;

	// Abort any execution
	Abort();

	// Free all resources
	Unprepare();

	// Free the stack blocks
	for( asUINT n = 0; n < stackBlocks.GetLength(); n++ )
	{
		if( stackBlocks[n] )
		{
			asDELETEARRAY(stackBlocks[n]);
		}
	}
	stackBlocks.SetLength(0);
	stackBlockSize = 0;

	// Clean the user data
	if( userData && engine->cleanContextFunc )
		engine->cleanContextFunc(this);

	// Clear engine pointer
	if( holdEngineRef )
		engine->Release();
	engine = 0;
}

asIScriptEngine *asCContext::GetEngine() const
{
	return engine;
}

// interface
void *asCContext::SetUserData(void *data)
{
	void *oldData = userData;
	userData = data;
	return oldData;
}

// interface
void *asCContext::GetUserData() const
{
	return userData;
}

// interface
int asCContext::Prepare(int funcId)
{
	if( funcId == -1 )
	{
		if( initialFunction == 0 )
			return asNO_FUNCTION;

		funcId = initialFunction->GetId();
	}
	return Prepare(engine->GetFunctionById(funcId));
}

// interface
asIScriptFunction *asCContext::GetSystemFunction()
{
	return callingSystemFunction;
}

// interface
int asCContext::Prepare(asIScriptFunction *func)
{
	if( func == 0 ) 
	{
		asCString str;
		str.Format(TXT_FAILED_IN_FUNC_s_WITH_s, "Prepare", "null");
		engine->WriteMessage("", 0, 0, asMSGTYPE_ERROR, str.AddressOf());
		return asNO_FUNCTION;
	}

	if( status == asEXECUTION_ACTIVE || status == asEXECUTION_SUSPENDED )
	{
		asCString str;
		str.Format(TXT_FAILED_IN_FUNC_s, "Prepare");
		engine->WriteMessage("", 0, 0, asMSGTYPE_ERROR, str.AddressOf());
		return asCONTEXT_ACTIVE;
	}

	// Clean the stack if not done before
	if( status != asEXECUTION_FINISHED && status != asEXECUTION_UNINITIALIZED )
		CleanStack();

	// Release the returned object (if any)
	CleanReturnObject();

	if( initialFunction && initialFunction == func )
	{
		// If the same function is executed again, we can skip a lot of the setup 
		currentFunction = initialFunction;
	}
	else
	{
		// Check engine pointer
		asASSERT( engine );

		if( initialFunction )
			initialFunction->Release();

		// We trust the application not to pass anything else but a asCScriptFunction
		initialFunction = reinterpret_cast<asCScriptFunction *>(func);
		initialFunction->AddRef();
		currentFunction = initialFunction;

		// TODO: runtime optimize: GetSpaceNeededForArguments() should be precomputed
		argumentsSize = currentFunction->GetSpaceNeededForArguments() + (currentFunction->objectType ? AS_PTR_SIZE : 0);

		// Reserve space for the arguments and return value
		if( currentFunction->DoesReturnOnStack() )
		{
			returnValueSize = currentFunction->returnType.GetSizeInMemoryDWords();
			argumentsSize += AS_PTR_SIZE;
		}
		else
			returnValueSize = 0;

		// Determine the minimum stack size needed
		int stackSize = argumentsSize + returnValueSize + currentFunction->stackNeeded + RESERVE_STACK;

		stackSize = stackSize > engine->initialContextStackSize ? stackSize : engine->initialContextStackSize;

		if( stackSize > stackBlockSize )
		{
			// Free old stack blocks so new ones can be allocted
			for( asUINT n = 0; n < stackBlocks.GetLength(); n++ )
				if( stackBlocks[n] )
				{
					asDELETEARRAY(stackBlocks[n]);
				}
			stackBlocks.SetLength(0);

			stackBlockSize = stackSize;

			asDWORD *stack = asNEWARRAY(asDWORD,stackBlockSize);
			stackBlocks.PushLast(stack);
		}
	}

	// Reset state
	// Most of the time the previous state will be asEXECUTION_FINISHED, in which case the values are already initialized
	if( status != asEXECUTION_FINISHED )
	{
		exceptionLine           = -1;
		exceptionFunction       = 0;
		doAbort                 = false;
		doSuspend               = false;
		regs.doProcessSuspend   = lineCallback;
		externalSuspendRequest  = false;
		stackIndex              = 0;
	}
	status = asEXECUTION_PREPARED;
	regs.programPointer = 0;

	// Reserve space for the arguments and return value
	regs.stackFramePointer = stackBlocks[0] + stackBlockSize - argumentsSize - returnValueSize;
	regs.stackPointer      = regs.stackFramePointer;

	// Set arguments to 0
	memset(regs.stackPointer, 0, 4*argumentsSize);

	if( returnValueSize )
	{
		// Set the address of the location where the return value should be put
		asDWORD *ptr = regs.stackFramePointer;
		if( currentFunction->objectType )
			ptr += AS_PTR_SIZE;

		*(void**)ptr = (void*)(stackBlocks[0] + stackBlockSize - returnValueSize);
	}

	return asSUCCESS;
}

// Free all resources
int asCContext::Unprepare()
{
	if( status == asEXECUTION_ACTIVE || status == asEXECUTION_SUSPENDED )
		return asCONTEXT_ACTIVE;

	// Only clean the stack if the context was prepared but not executed until the end
	if( status != asEXECUTION_UNINITIALIZED && 
		status != asEXECUTION_FINISHED )
		CleanStack();

	// Release the returned object (if any)
	CleanReturnObject();

	// Release the initial function
	if( initialFunction )
		initialFunction->Release();

	// Clear function pointers
	initialFunction = 0;
	currentFunction = 0;
	exceptionFunction = 0;
	regs.programPointer = 0;

	// Reset status
	status = asEXECUTION_UNINITIALIZED;

	regs.stackFramePointer = 0;
	regs.stackPointer = 0;
	stackIndex = 0;
	
	return 0;
}

asBYTE asCContext::GetReturnByte()
{
	if( status != asEXECUTION_FINISHED ) return 0;

	asCDataType *dt = &initialFunction->returnType;

	if( dt->IsObject() || dt->IsReference() ) return 0;

	return *(asBYTE*)&regs.valueRegister;
}

asWORD asCContext::GetReturnWord()
{
	if( status != asEXECUTION_FINISHED ) return 0;

	asCDataType *dt = &initialFunction->returnType;

	if( dt->IsObject() || dt->IsReference() ) return 0;

	return *(asWORD*)&regs.valueRegister;
}

asDWORD asCContext::GetReturnDWord()
{
	if( status != asEXECUTION_FINISHED ) return 0;

	asCDataType *dt = &initialFunction->returnType;

	if( dt->IsObject() || dt->IsReference() ) return 0;

	return *(asDWORD*)&regs.valueRegister;
}

asQWORD asCContext::GetReturnQWord()
{
	if( status != asEXECUTION_FINISHED ) return 0;

	asCDataType *dt = &initialFunction->returnType;

	if( dt->IsObject() || dt->IsReference() ) return 0;

	return regs.valueRegister;
}

float asCContext::GetReturnFloat()
{
	if( status != asEXECUTION_FINISHED ) return 0;

	asCDataType *dt = &initialFunction->returnType;

	if( dt->IsObject() || dt->IsReference() ) return 0;

	return *(float*)&regs.valueRegister;
}

double asCContext::GetReturnDouble()
{
	if( status != asEXECUTION_FINISHED ) return 0;

	asCDataType *dt = &initialFunction->returnType;

	if( dt->IsObject() || dt->IsReference() ) return 0;

	return *(double*)&regs.valueRegister;
}

void *asCContext::GetReturnAddress()
{
	if( status != asEXECUTION_FINISHED ) return 0;

	asCDataType *dt = &initialFunction->returnType;

	if( dt->IsReference() )
		return *(void**)&regs.valueRegister;
	else if( dt->IsObject() )
	{
		if( initialFunction->DoesReturnOnStack() )
			return (void*)(stackBlocks[0] + stackBlockSize - returnValueSize);

		return regs.objectRegister;
	}

	return 0;
}

void *asCContext::GetReturnObject()
{
	if( status != asEXECUTION_FINISHED ) return 0;

	asCDataType *dt = &initialFunction->returnType;

	if( !dt->IsObject() ) return 0;

	if( dt->IsReference() )
		return *(void**)(asPWORD)regs.valueRegister;
	else
	{
		if( initialFunction->DoesReturnOnStack() )
			return (void*)(stackBlocks[0] + stackBlockSize - returnValueSize);

		return regs.objectRegister;
	}
}

void *asCContext::GetAddressOfReturnValue()
{
	if( status != asEXECUTION_FINISHED ) return 0;

	asCDataType *dt = &initialFunction->returnType;

	// An object is stored in the objectRegister
	if( !dt->IsReference() && dt->IsObject() )
	{
		// Need to dereference objects 
		if( !dt->IsObjectHandle() )
		{
			if( initialFunction->DoesReturnOnStack() )
				return (void*)(stackBlocks[0] + stackBlockSize - returnValueSize);

			return *(void**)&regs.objectRegister;
		}
		return &regs.objectRegister;
	}

	// Primitives and references are stored in valueRegister
	return &regs.valueRegister;
}

int asCContext::SetObject(void *obj)
{
	if( status != asEXECUTION_PREPARED )
		return asCONTEXT_NOT_PREPARED;

	if( !initialFunction->objectType )
	{
		status = asEXECUTION_ERROR;
		return asERROR;
	}

	*(asPWORD*)&regs.stackFramePointer[0] = (asPWORD)obj;

	return 0;
}

int asCContext::SetArgByte(asUINT arg, asBYTE value)
{
	if( status != asEXECUTION_PREPARED )
		return asCONTEXT_NOT_PREPARED;

	if( arg >= (unsigned)initialFunction->parameterTypes.GetLength() )
	{
		status = asEXECUTION_ERROR;
		return asINVALID_ARG;
	}

	// Verify the type of the argument
	asCDataType *dt = &initialFunction->parameterTypes[arg];
	if( dt->IsObject() || dt->IsReference() )
	{
		status = asEXECUTION_ERROR;
		return asINVALID_TYPE;
	}

	if( dt->GetSizeInMemoryBytes() != 1 )
	{
		status = asEXECUTION_ERROR;
		return asINVALID_TYPE;
	}

	// Determine the position of the argument
	int offset = 0;
	if( initialFunction->objectType )
		offset += AS_PTR_SIZE;

	// If function returns object by value an extra pointer is pushed on the stack
	if( returnValueSize )
		offset += AS_PTR_SIZE;

	for( asUINT n = 0; n < arg; n++ )
		offset += initialFunction->parameterTypes[n].GetSizeOnStackDWords();

	// Set the value
	*(asBYTE*)&regs.stackFramePointer[offset] = value;

	return 0;
}

int asCContext::SetArgWord(asUINT arg, asWORD value)
{
	if( status != asEXECUTION_PREPARED )
		return asCONTEXT_NOT_PREPARED;

	if( arg >= (unsigned)initialFunction->parameterTypes.GetLength() )
	{
		status = asEXECUTION_ERROR;
		return asINVALID_ARG;
	}

	// Verify the type of the argument
	asCDataType *dt = &initialFunction->parameterTypes[arg];
	if( dt->IsObject() || dt->IsReference() )
	{
		status = asEXECUTION_ERROR;
		return asINVALID_TYPE;
	}

	if( dt->GetSizeInMemoryBytes() != 2 )
	{
		status = asEXECUTION_ERROR;
		return asINVALID_TYPE;
	}

	// Determine the position of the argument
	int offset = 0;
	if( initialFunction->objectType )
		offset += AS_PTR_SIZE;

	// If function returns object by value an extra pointer is pushed on the stack
	if( returnValueSize )
		offset += AS_PTR_SIZE;

	for( asUINT n = 0; n < arg; n++ )
		offset += initialFunction->parameterTypes[n].GetSizeOnStackDWords();

	// Set the value
	*(asWORD*)&regs.stackFramePointer[offset] = value;

	return 0;
}

int asCContext::SetArgDWord(asUINT arg, asDWORD value)
{
	if( status != asEXECUTION_PREPARED )
		return asCONTEXT_NOT_PREPARED;

	if( arg >= (unsigned)initialFunction->parameterTypes.GetLength() )
	{
		status = asEXECUTION_ERROR;
		return asINVALID_ARG;
	}

	// Verify the type of the argument
	asCDataType *dt = &initialFunction->parameterTypes[arg];
	if( dt->IsObject() || dt->IsReference() )
	{
		status = asEXECUTION_ERROR;
		return asINVALID_TYPE;
	}

	if( dt->GetSizeInMemoryBytes() != 4 )
	{
		status = asEXECUTION_ERROR;
		return asINVALID_TYPE;
	}

	// Determine the position of the argument
	int offset = 0;
	if( initialFunction->objectType )
		offset += AS_PTR_SIZE;

	// If function returns object by value an extra pointer is pushed on the stack
	if( returnValueSize )
		offset += AS_PTR_SIZE;

	for( asUINT n = 0; n < arg; n++ )
		offset += initialFunction->parameterTypes[n].GetSizeOnStackDWords();

	// Set the value
	*(asDWORD*)&regs.stackFramePointer[offset] = value;

	return 0;
}

int asCContext::SetArgQWord(asUINT arg, asQWORD value)
{
	if( status != asEXECUTION_PREPARED )
		return asCONTEXT_NOT_PREPARED;

	if( arg >= (unsigned)initialFunction->parameterTypes.GetLength() )
	{
		status = asEXECUTION_ERROR;
		return asINVALID_ARG;
	}

	// Verify the type of the argument
	asCDataType *dt = &initialFunction->parameterTypes[arg];
	if( dt->IsObject() || dt->IsReference() )
	{
		status = asEXECUTION_ERROR;
		return asINVALID_TYPE;
	}

	if( dt->GetSizeOnStackDWords() != 2 )
	{
		status = asEXECUTION_ERROR;
		return asINVALID_TYPE;
	}

	// Determine the position of the argument
	int offset = 0;
	if( initialFunction->objectType )
		offset += AS_PTR_SIZE;

	// If function returns object by value an extra pointer is pushed on the stack
	if( returnValueSize )
		offset += AS_PTR_SIZE;

	for( asUINT n = 0; n < arg; n++ )
		offset += initialFunction->parameterTypes[n].GetSizeOnStackDWords();

	// Set the value
	*(asQWORD*)(&regs.stackFramePointer[offset]) = value;

	return 0;
}

int asCContext::SetArgFloat(asUINT arg, float value)
{
	if( status != asEXECUTION_PREPARED )
		return asCONTEXT_NOT_PREPARED;

	if( arg >= (unsigned)initialFunction->parameterTypes.GetLength() )
	{
		status = asEXECUTION_ERROR;
		return asINVALID_ARG;
	}

	// Verify the type of the argument
	asCDataType *dt = &initialFunction->parameterTypes[arg];
	if( dt->IsObject() || dt->IsReference() )
	{
		status = asEXECUTION_ERROR;
		return asINVALID_TYPE;
	}

	if( dt->GetSizeOnStackDWords() != 1 )
	{
		status = asEXECUTION_ERROR;
		return asINVALID_TYPE;
	}

	// Determine the position of the argument
	int offset = 0;
	if( initialFunction->objectType )
		offset += AS_PTR_SIZE;

	// If function returns object by value an extra pointer is pushed on the stack
	if( returnValueSize )
		offset += AS_PTR_SIZE;

	for( asUINT n = 0; n < arg; n++ )
		offset += initialFunction->parameterTypes[n].GetSizeOnStackDWords();

	// Set the value
	*(float*)(&regs.stackFramePointer[offset]) = value;

	return 0;
}

int asCContext::SetArgDouble(asUINT arg, double value)
{
	if( status != asEXECUTION_PREPARED )
		return asCONTEXT_NOT_PREPARED;

	if( arg >= (unsigned)initialFunction->parameterTypes.GetLength() )
	{
		status = asEXECUTION_ERROR;
		return asINVALID_ARG;
	}

	// Verify the type of the argument
	asCDataType *dt = &initialFunction->parameterTypes[arg];
	if( dt->IsObject() || dt->IsReference() )
	{
		status = asEXECUTION_ERROR;
		return asINVALID_TYPE;
	}

	if( dt->GetSizeOnStackDWords() != 2 )
	{
		status = asEXECUTION_ERROR;
		return asINVALID_TYPE;
	}

	// Determine the position of the argument
	int offset = 0;
	if( initialFunction->objectType )
		offset += AS_PTR_SIZE;

	// If function returns object by value an extra pointer is pushed on the stack
	if( returnValueSize )
		offset += AS_PTR_SIZE;

	for( asUINT n = 0; n < arg; n++ )
		offset += initialFunction->parameterTypes[n].GetSizeOnStackDWords();

	// Set the value
	*(double*)(&regs.stackFramePointer[offset]) = value;

	return 0;
}

int asCContext::SetArgAddress(asUINT arg, void *value)
{
	if( status != asEXECUTION_PREPARED )
		return asCONTEXT_NOT_PREPARED;

	if( arg >= (unsigned)initialFunction->parameterTypes.GetLength() )
	{
		status = asEXECUTION_ERROR;
		return asINVALID_ARG;
	}

	// Verify the type of the argument
	asCDataType *dt = &initialFunction->parameterTypes[arg];
	if( !dt->IsReference() && !dt->IsObjectHandle() )
	{
		status = asEXECUTION_ERROR;
		return asINVALID_TYPE;
	}

	// Determine the position of the argument
	int offset = 0;
	if( initialFunction->objectType )
		offset += AS_PTR_SIZE;

	// If function returns object by value an extra pointer is pushed on the stack
	if( returnValueSize )
		offset += AS_PTR_SIZE;

	for( asUINT n = 0; n < arg; n++ )
		offset += initialFunction->parameterTypes[n].GetSizeOnStackDWords();

	// Set the value
	*(asPWORD*)(&regs.stackFramePointer[offset]) = (asPWORD)value;

	return 0;
}

int asCContext::SetArgObject(asUINT arg, void *obj)
{
	if( status != asEXECUTION_PREPARED )
		return asCONTEXT_NOT_PREPARED;

	if( arg >= (unsigned)initialFunction->parameterTypes.GetLength() )
	{
		status = asEXECUTION_ERROR;
		return asINVALID_ARG;
	}

	// Verify the type of the argument
	asCDataType *dt = &initialFunction->parameterTypes[arg];
	if( !dt->IsObject() )
	{
		status = asEXECUTION_ERROR;
		return asINVALID_TYPE;
	}

	// If the object should be sent by value we must make a copy of it
	if( !dt->IsReference() )
	{
		if( dt->IsObjectHandle() )
		{
			// Increase the reference counter
			asSTypeBehaviour *beh = &dt->GetObjectType()->beh;
			if( obj && beh->addref )
				engine->CallObjectMethod(obj, beh->addref);
		}
		else 
		{
			obj = engine->CreateScriptObjectCopy(obj, engine->GetTypeIdFromDataType(*dt));
		}
	}

	// Determine the position of the argument
	int offset = 0;
	if( initialFunction->objectType )
		offset += AS_PTR_SIZE;

	// If function returns object by value an extra pointer is pushed on the stack
	if( returnValueSize )
		offset += AS_PTR_SIZE;

	for( asUINT n = 0; n < arg; n++ )
		offset += initialFunction->parameterTypes[n].GetSizeOnStackDWords();

	// Set the value
	*(asPWORD*)(&regs.stackFramePointer[offset]) = (asPWORD)obj;

	return 0;
}


// TODO: Instead of GetAddressOfArg, maybe we need a SetArgValue(int arg, void *value, bool takeOwnership) instead.

// interface
void *asCContext::GetAddressOfArg(asUINT arg)
{
	if( status != asEXECUTION_PREPARED )
		return 0;

	if( arg >= (unsigned)initialFunction->parameterTypes.GetLength() )
		return 0;

	// Determine the position of the argument
	int offset = 0;
	if( initialFunction->objectType )
		offset += AS_PTR_SIZE;

	// If function returns object by value an extra pointer is pushed on the stack
	if( returnValueSize )
		offset += AS_PTR_SIZE;

	for( asUINT n = 0; n < arg; n++ )
		offset += initialFunction->parameterTypes[n].GetSizeOnStackDWords();

	// We should return the address of the location where the argument value will be placed

	// All registered types are always sent by reference, even if  
	// the function is declared to receive the argument by value.	
	return &regs.stackFramePointer[offset];
}


int asCContext::Abort()
{
	if( engine == 0 ) return asERROR;

	// TODO: multithread: Make thread safe. There is a chance that the status
	//                    changes to something else after being set to ABORTED here.
	if( status == asEXECUTION_SUSPENDED )
		status = asEXECUTION_ABORTED;

	doSuspend = true;
	regs.doProcessSuspend = true;
	externalSuspendRequest = true;
	doAbort = true;

	return 0;
}

// interface
int asCContext::Suspend()
{
	// This function just sets some internal flags and is safe 
	// to call from a secondary thread, even if the library has
	// been built without multi-thread support.

	if( engine == 0 ) return asERROR;

	doSuspend = true;
	externalSuspendRequest = true;
	regs.doProcessSuspend = true;

	return 0;
}

// interface
int asCContext::Execute()
{
	asASSERT( engine != 0 );

	if( status != asEXECUTION_SUSPENDED && status != asEXECUTION_PREPARED )
	{
		asCString str;
		str.Format(TXT_FAILED_IN_FUNC_s, "Execute");
		engine->WriteMessage("", 0, 0, asMSGTYPE_ERROR, str.AddressOf());
		return asERROR;
	}

	status = asEXECUTION_ACTIVE;

	asPushActiveContext((asIScriptContext *)this);

	if( regs.programPointer == 0 )
	{
		if( currentFunction->funcType == asFUNC_VIRTUAL ||
			currentFunction->funcType == asFUNC_INTERFACE )
		{
			// The currentFunction is a virtual method

			// Determine the true function from the object
			asCScriptObject *obj = *(asCScriptObject**)(asPWORD*)regs.stackFramePointer;
			if( obj == 0 )
			{
				SetInternalException(TXT_NULL_POINTER_ACCESS);
			}
			else
			{
				asCObjectType *objType = obj->objType;
				asCScriptFunction *realFunc = 0;

				if( currentFunction->funcType == asFUNC_VIRTUAL )
				{
					if( objType->virtualFunctionTable.GetLength() > (asUINT)currentFunction->vfTableIdx )
					{
						realFunc = objType->virtualFunctionTable[currentFunction->vfTableIdx];
					}
				}
				else
				{
					// Search the object type for a function that matches the interface function
					for( asUINT n = 0; n < objType->methods.GetLength(); n++ )
					{
						asCScriptFunction *f2 = engine->scriptFunctions[objType->methods[n]];
						if( f2->signatureId == currentFunction->signatureId )
						{
							if( f2->funcType == asFUNC_VIRTUAL )
								realFunc = objType->virtualFunctionTable[f2->vfTableIdx];
							else
								realFunc = f2;
							break;
						}
					}
				}

				if( realFunc )
				{
					if( realFunc->signatureId != currentFunction->signatureId )
						SetInternalException(TXT_NULL_POINTER_ACCESS);
					else
						currentFunction = realFunc;
				}
			}
		}

		if( currentFunction->funcType == asFUNC_SCRIPT )
		{
			regs.programPointer = currentFunction->byteCode.AddressOf();

			// Set up the internal registers for executing the script function
			PrepareScriptFunction();
		}
		else if( currentFunction->funcType == asFUNC_SYSTEM )
		{
			// The current function is an application registered function

			// Call the function directly
			CallSystemFunction(currentFunction->id, this, 0);
			
			// Was the call successful?
			if( status == asEXECUTION_ACTIVE )
			{
				status = asEXECUTION_FINISHED;
			}
		}
		else
		{
			// This shouldn't happen
			asASSERT(false);
		}
	}

	while( status == asEXECUTION_ACTIVE )
		ExecuteNext();

	doSuspend = false;
	regs.doProcessSuspend = lineCallback;

	asPopActiveContext((asIScriptContext *)this);

	if( status == asEXECUTION_FINISHED )
	{
		regs.objectType = initialFunction->returnType.GetObjectType();
		return asEXECUTION_FINISHED;
	}

	if( doAbort )
	{
		doAbort = false;

		status = asEXECUTION_ABORTED;
		return asEXECUTION_ABORTED;
	}

	if( status == asEXECUTION_SUSPENDED )
		return asEXECUTION_SUSPENDED;

	if( status == asEXECUTION_EXCEPTION )
		return asEXECUTION_EXCEPTION;

	return asERROR;
}

void asCContext::PushCallState()
{
	if( callStack.GetLength() == callStack.GetCapacity() )
	{
		// Allocate space for 10 call states at a time to save time
		callStack.AllocateNoConstruct(callStack.GetLength() + 10*CALLSTACK_FRAME_SIZE, true);
	}
	callStack.SetLengthNoConstruct(callStack.GetLength() + CALLSTACK_FRAME_SIZE);

    // Separating the loads and stores limits data cache trash, and with a smart compiler
    // could turn into SIMD style loading/storing if available.
    // The compiler can't do this itself due to potential pointer aliasing between the pointers,
    // ie writing to tmp could overwrite the data contained in registers.stackFramePointer for example
    // for all the compiler knows. So introducing the local variable s, which is never referred to by
    // its address we avoid this issue.

	asPWORD s[5];
	s[0] = (asPWORD)regs.stackFramePointer;
	s[1] = (asPWORD)currentFunction;
	s[2] = (asPWORD)regs.programPointer;
	s[3] = (asPWORD)regs.stackPointer;
	s[4] = stackIndex;

	asPWORD *tmp = callStack.AddressOf() + callStack.GetLength() - CALLSTACK_FRAME_SIZE;
	tmp[0] = s[0];
	tmp[1] = s[1];
	tmp[2] = s[2];
	tmp[3] = s[3];
	tmp[4] = s[4];
}

void asCContext::PopCallState()
{
	// See comments in PushCallState about pointer aliasing and data cache trashing
	asPWORD *tmp = callStack.AddressOf() + callStack.GetLength() - CALLSTACK_FRAME_SIZE;
	asPWORD s[5];
	s[0] = tmp[0];
	s[1] = tmp[1];
	s[2] = tmp[2];
	s[3] = tmp[3];
	s[4] = tmp[4];

	regs.stackFramePointer = (asDWORD*)s[0];
	currentFunction        = (asCScriptFunction*)s[1];
	regs.programPointer    = (asDWORD*)s[2];
	regs.stackPointer      = (asDWORD*)s[3];
	stackIndex             = (int)s[4];

	callStack.SetLength(callStack.GetLength() - CALLSTACK_FRAME_SIZE);
}

// interface
asUINT asCContext::GetCallstackSize()
{
	if( currentFunction == 0 ) return 0;

	// The current function is accessed at stackLevel 0
	return asUINT(1 + callStack.GetLength() / CALLSTACK_FRAME_SIZE);
}

// interface
asIScriptFunction *asCContext::GetFunction(asUINT stackLevel)
{
	if( stackLevel >= GetCallstackSize() ) return 0;

	if( stackLevel == 0 ) return currentFunction;

	asPWORD *s = callStack.AddressOf() + (GetCallstackSize() - stackLevel - 1)*CALLSTACK_FRAME_SIZE;
	asCScriptFunction *func = (asCScriptFunction*)s[1];

	return func;
}

// interface
int asCContext::GetLineNumber(asUINT stackLevel, int *column, const char **sectionName)
{
	if( stackLevel >= GetCallstackSize() ) return asINVALID_ARG;

	asCScriptFunction *func;
	asDWORD *bytePos;
	if( stackLevel == 0 )
	{
		func = currentFunction;
		bytePos = regs.programPointer;
	}
	else
	{
		asPWORD *s = callStack.AddressOf() + (GetCallstackSize()-stackLevel-1)*CALLSTACK_FRAME_SIZE;
		func = (asCScriptFunction*)s[1];
		bytePos = (asDWORD*)s[2];
	}

	asDWORD line = func->GetLineNumber(int(bytePos - func->byteCode.AddressOf()));
	if( column ) *column = (line >> 20);

	if( sectionName ) *sectionName = func->GetScriptSectionName();

	return (line & 0xFFFFF);
}

void asCContext::CallScriptFunction(asCScriptFunction *func)
{
	// Push the framepointer, function id and programCounter on the stack
	PushCallState();

	// Update the current function and program position before increasing the stack 
	// so the exception handler will know what to do if there is a stack overflow
	currentFunction = func;
	regs.programPointer = currentFunction->byteCode.AddressOf();

	// Verify if there is enough room in the stack block. Allocate new block if not
	if( regs.stackPointer - (func->stackNeeded + RESERVE_STACK) < stackBlocks[stackIndex] )
	{
		asDWORD *oldStackPointer = regs.stackPointer;

		// The size of each stack block is determined by the following formula:
		// size = stackBlockSize << index

		while( regs.stackPointer - (func->stackNeeded + RESERVE_STACK) < stackBlocks[stackIndex] )
		{
			// Make sure we don't allocate more space than allowed
			if( engine->ep.maximumContextStackSize )
			{
				// This test will only stop growth once it has already crossed the limit
				if( stackBlockSize * ((1 << (stackIndex+1)) - 1) > engine->ep.maximumContextStackSize )
				{
					isStackMemoryNotAllocated = true;

					// Set the stackFramePointer, even though the stackPointer wasn't updated
					regs.stackFramePointer = regs.stackPointer;

					// TODO: Make sure the exception handler doesn't try to free objects that have not been initialized
					SetInternalException(TXT_STACK_OVERFLOW);
					return;
				}
			}

			stackIndex++;
			if( (int)stackBlocks.GetLength() == stackIndex )
			{
				asDWORD *stack = asNEWARRAY(asDWORD,(stackBlockSize << stackIndex));
				stackBlocks.PushLast(stack);
			}

			regs.stackPointer = stackBlocks[stackIndex] + (stackBlockSize<<stackIndex) - func->GetSpaceNeededForArguments() - (func->objectType ? AS_PTR_SIZE : 0) - (func->DoesReturnOnStack() ? AS_PTR_SIZE : 0);
		} 

		// Copy the function arguments to the new stack space
		int numDwords = func->GetSpaceNeededForArguments() + (func->objectType ? AS_PTR_SIZE : 0) + (func->DoesReturnOnStack() ? AS_PTR_SIZE : 0);
		memcpy(regs.stackPointer, oldStackPointer, sizeof(asDWORD)*numDwords);
	}

	PrepareScriptFunction();
}

void asCContext::PrepareScriptFunction()
{
	// Update framepointer
	regs.stackFramePointer = regs.stackPointer;

	// Set all object variables to 0 to guarantee that they are null before they are used
	// Only variables on the heap should be cleared. The rest will be cleared by calling the constructor
	asUINT n = currentFunction->objVariablesOnHeap;
	while( n-- > 0 )
	{
		int pos = currentFunction->objVariablePos[n];
		*(asPWORD*)&regs.stackFramePointer[-pos] = 0;
	}

	// Initialize the stack pointer with the space needed for local variables
	regs.stackPointer -= currentFunction->variableSpace;

	// Call the line callback for each script function, to guarantee that infinitely recursive scripts can
	// be interrupted, even if the scripts have been compiled with asEP_BUILD_WITHOUT_LINE_CUES
	if( regs.doProcessSuspend )
	{
		if( lineCallback )
			CallLineCallback();
		if( doSuspend )
			status = asEXECUTION_SUSPENDED;
	}
}

void asCContext::CallInterfaceMethod(asCScriptFunction *func)
{
	// Resolve the interface method using the current script type
	asCScriptObject *obj = *(asCScriptObject**)(asPWORD*)regs.stackPointer;
	if( obj == 0 )
	{
		SetInternalException(TXT_NULL_POINTER_ACCESS);
		return;
	}

	asCObjectType *objType = obj->objType;

	// TODO: runtime optimize: The object type should have a list of only those methods that 
	//                         implement interface methods. This list should be ordered by
	//                         the signatureId so that a binary search can be made, instead
	//                         of a linear search.
	//
	//                         When this is done, we must also make sure the signatureId of a 
	//                         function never changes, e.g. when if the signature functions are
	//                         released.

	// Search the object type for a function that matches the interface function
	asCScriptFunction *realFunc = 0;
	if( func->funcType == asFUNC_INTERFACE )
	{
		for( asUINT n = 0; n < objType->methods.GetLength(); n++ )
		{
			asCScriptFunction *f2 = engine->scriptFunctions[objType->methods[n]];
			if( f2->signatureId == func->signatureId )
			{
				if( f2->funcType == asFUNC_VIRTUAL )
					realFunc = objType->virtualFunctionTable[f2->vfTableIdx];
				else
					realFunc = f2;
				break;
			}
		}

		if( realFunc == 0 )
		{
			SetInternalException(TXT_NULL_POINTER_ACCESS);
			return;
		}
	}
	else // if( func->funcType == asFUNC_VIRTUAL )
	{
		realFunc = objType->virtualFunctionTable[func->vfTableIdx];
	}

	// Then call the true script function
	CallScriptFunction(realFunc);
}

void asCContext::ExecuteNext()
{
	asDWORD *l_bc = regs.programPointer;
	asDWORD *l_sp = regs.stackPointer;
	asDWORD *l_fp = regs.stackFramePointer;

	for(;;)
	{

#ifdef AS_DEBUG
	// Gather statistics on executed bytecode 
	stats.Instr(*(asBYTE*)l_bc);

	// Used to verify that the size of the instructions are correct
	asDWORD *old = l_bc;
#endif


	// Remember to keep the cases in order and without
	// gaps, because that will make the switch faster.
	// It will be faster since only one lookup will be
	// made to find the correct jump destination. If not
	// in order, the switch will make two lookups.
	switch( *(asBYTE*)l_bc )
	{
//--------------
// memory access functions

	case asBC_PopPtr:
		// Pop a pointer from the stack
		l_sp += AS_PTR_SIZE;
		l_bc++;
		break;

	case asBC_PshGPtr:
		// Replaces PGA + RDSPtr
		l_sp -= AS_PTR_SIZE;
		*(asPWORD*)l_sp = *(asPWORD*)asBC_PTRARG(l_bc);
		l_bc += 1 + AS_PTR_SIZE;
		break;

	// Push a dword value on the stack
	case asBC_PshC4:
		--l_sp;
		*l_sp = asBC_DWORDARG(l_bc);
		l_bc += 2;
		break;

	// Push the dword value of a variable on the stack
	case asBC_PshV4:
		--l_sp;
		*l_sp = *(l_fp - asBC_SWORDARG0(l_bc));
		l_bc++;
		break;

	// Push the address of a variable on the stack
	case asBC_PSF:
		l_sp -= AS_PTR_SIZE;
		*(asPWORD*)l_sp = asPWORD(l_fp - asBC_SWORDARG0(l_bc));
		l_bc++;
		break;

	// Swap the top 2 pointers on the stack
	case asBC_SwapPtr:
		{
			asPWORD p = (asPWORD)*l_sp;
			*(asPWORD*)l_sp = *(asPWORD*)(l_sp+AS_PTR_SIZE);
			*(asPWORD*)(l_sp+AS_PTR_SIZE) = p;
			l_bc++;
		}
		break;

	// Do a boolean not operation, modifying the value of the variable
	case asBC_NOT:
#if AS_SIZEOF_BOOL == 1
		{
			// Set the value to true if it is equal to 0

			// We need to use volatile here to tell the compiler it cannot
			// change the order of read and write operations on the pointer.

			volatile asBYTE *ptr = (asBYTE*)(l_fp - asBC_SWORDARG0(l_bc));
			asBYTE val = (ptr[0] == 0) ? VALUE_OF_BOOLEAN_TRUE : 0;
			ptr[0] = val; // The result is stored in the lower byte
			ptr[1] = 0;   // Make sure the rest of the DWORD is 0
			ptr[2] = 0;
			ptr[3] = 0;
		}
#else
		*(l_fp - asBC_SWORDARG0(l_bc)) = (*(l_fp - asBC_SWORDARG0(l_bc)) == 0 ? VALUE_OF_BOOLEAN_TRUE : 0);
#endif
		l_bc++;
		break;

	// Push the dword value of a global variable on the stack
	case asBC_PshG4:
		--l_sp;
		*l_sp = *(asDWORD*)asBC_PTRARG(l_bc);
		l_bc += 1 + AS_PTR_SIZE;
		break;

	// Load the address of a global variable in the register, then  
	// copy the value of the global variable into a local variable
	case asBC_LdGRdR4:
		*(void**)&regs.valueRegister = (void*)asBC_PTRARG(l_bc);
		*(l_fp - asBC_SWORDARG0(l_bc)) = **(asDWORD**)&regs.valueRegister;
		l_bc += 1+AS_PTR_SIZE;
		break;

//----------------
// path control instructions

	// Begin execution of a script function
	case asBC_CALL:
		{
			int i = asBC_INTARG(l_bc);
			l_bc += 2;

			asASSERT( i >= 0 );
			asASSERT( (i & FUNC_IMPORTED) == 0 );

			// Need to move the values back to the context
			regs.programPointer = l_bc;
			regs.stackPointer = l_sp;
			regs.stackFramePointer = l_fp;

			CallScriptFunction(engine->scriptFunctions[i]);

			// Extract the values from the context again
			l_bc = regs.programPointer;
			l_sp = regs.stackPointer;
			l_fp = regs.stackFramePointer;

			// If status isn't active anymore then we must stop
			if( status != asEXECUTION_ACTIVE )
				return;
		}
		break;

	// Return to the caller, and remove the arguments from the stack
	case asBC_RET:
		{
			if( callStack.GetLength() == 0 )
			{
				status = asEXECUTION_FINISHED;
				return;
			}

			asWORD w = asBC_WORDARG0(l_bc);

			// Read the old framepointer, functionid, and programCounter from the call stack
			PopCallState();

			// Extract the values from the context again
			l_bc = regs.programPointer;
			l_sp = regs.stackPointer;
			l_fp = regs.stackFramePointer;

			// Pop arguments from stack
			l_sp += w;
		}
		break;

	// Jump to a relative position
	case asBC_JMP:
		l_bc += 2 + asBC_INTARG(l_bc);
		break;

//----------------
// Conditional jumps

	// Jump to a relative position if the value in the register is 0
	case asBC_JZ:
		if( *(int*)&regs.valueRegister == 0 )
			l_bc += asBC_INTARG(l_bc) + 2;
		else
			l_bc += 2;
		break;

	// Jump to a relative position if the value in the register is not 0
	case asBC_JNZ:
		if( *(int*)&regs.valueRegister != 0 )
			l_bc += asBC_INTARG(l_bc) + 2;
		else
			l_bc += 2;
		break;

	// Jump to a relative position if the value in the register is negative
	case asBC_JS:
		if( *(int*)&regs.valueRegister < 0 )
			l_bc += asBC_INTARG(l_bc) + 2;
		else
			l_bc += 2;
		break;

	// Jump to a relative position if the value in the register it not negative
	case asBC_JNS:
		if( *(int*)&regs.valueRegister >= 0 )
			l_bc += asBC_INTARG(l_bc) + 2;
		else
			l_bc += 2;
		break;

	// Jump to a relative position if the value in the register is greater than 0
	case asBC_JP:
		if( *(int*)&regs.valueRegister > 0 )
			l_bc += asBC_INTARG(l_bc) + 2;
		else
			l_bc += 2;
		break;

	// Jump to a relative position if the value in the register is not greater than 0
	case asBC_JNP:
		if( *(int*)&regs.valueRegister <= 0 )
			l_bc += asBC_INTARG(l_bc) + 2;
		else
			l_bc += 2;
		break;
//--------------------
// test instructions

	// If the value in the register is 0, then set the register to 1, else to 0
	case asBC_TZ:
#if AS_SIZEOF_BOOL == 1
		{
			// Set the value to true if it is equal to 0

			// We need to use volatile here to tell the compiler it cannot
			// change the order of read and write operations on valueRegister.

			volatile int    *regPtr  = (int*)&regs.valueRegister;
			volatile asBYTE *regBptr = (asBYTE*)&regs.valueRegister;
			asBYTE val = (regPtr[0] == 0) ? VALUE_OF_BOOLEAN_TRUE : 0;
			regBptr[0] = val; // The result is stored in the lower byte
			regBptr[1] = 0;   // Make sure the rest of the register is 0
			regBptr[2] = 0;
			regBptr[3] = 0;
			regBptr[4] = 0;
			regBptr[5] = 0;
			regBptr[6] = 0;
			regBptr[7] = 0;
		}
#else
		*(int*)&regs.valueRegister = (*(int*)&regs.valueRegister == 0 ? VALUE_OF_BOOLEAN_TRUE : 0);
#endif
		l_bc++;
		break;

	// If the value in the register is not 0, then set the register to 1, else to 0
	case asBC_TNZ:
#if AS_SIZEOF_BOOL == 1
		{
			// Set the value to true if it is not equal to 0

			// We need to use volatile here to tell the compiler it cannot
			// change the order of read and write operations on valueRegister.

			volatile int    *regPtr  = (int*)&regs.valueRegister;
			volatile asBYTE *regBptr = (asBYTE*)&regs.valueRegister;
			asBYTE val = (regPtr[0] == 0) ? 0 : VALUE_OF_BOOLEAN_TRUE;
			regBptr[0] = val; // The result is stored in the lower byte
			regBptr[1] = 0;   // Make sure the rest of the register is 0
			regBptr[2] = 0;
			regBptr[3] = 0;
			regBptr[4] = 0;
			regBptr[5] = 0;
			regBptr[6] = 0;
			regBptr[7] = 0;
		}
#else
		*(int*)&regs.valueRegister = (*(int*)&regs.valueRegister == 0 ? 0 : VALUE_OF_BOOLEAN_TRUE);
#endif
		l_bc++;
		break;

	// If the value in the register is negative, then set the register to 1, else to 0
	case asBC_TS:
#if AS_SIZEOF_BOOL == 1
		{
			// Set the value to true if it is less than 0

			// We need to use volatile here to tell the compiler it cannot
			// change the order of read and write operations on valueRegister.

			volatile int    *regPtr  = (int*)&regs.valueRegister;
			volatile asBYTE *regBptr = (asBYTE*)&regs.valueRegister;
			asBYTE val = (regPtr[0] < 0) ? VALUE_OF_BOOLEAN_TRUE : 0;
			regBptr[0] = val; // The result is stored in the lower byte
			regBptr[1] = 0;   // Make sure the rest of the register is 0
			regBptr[2] = 0;
			regBptr[3] = 0;
			regBptr[4] = 0;
			regBptr[5] = 0;
			regBptr[6] = 0;
			regBptr[7] = 0;
		}
#else
		*(int*)&regs.valueRegister = (*(int*)&regs.valueRegister < 0 ? VALUE_OF_BOOLEAN_TRUE : 0);
#endif
		l_bc++;
		break;

	// If the value in the register is not negative, then set the register to 1, else to 0
	case asBC_TNS:
#if AS_SIZEOF_BOOL == 1
		{
			// Set the value to true if it is not less than 0

			// We need to use volatile here to tell the compiler it cannot
			// change the order of read and write operations on valueRegister.

			volatile int    *regPtr  = (int*)&regs.valueRegister;
			volatile asBYTE *regBptr = (asBYTE*)&regs.valueRegister;
			asBYTE val = (regPtr[0] >= 0) ? VALUE_OF_BOOLEAN_TRUE : 0;
			regBptr[0] = val; // The result is stored in the lower byte
			regBptr[1] = 0;   // Make sure the rest of the register is 0
			regBptr[2] = 0;
			regBptr[3] = 0;
			regBptr[4] = 0;
			regBptr[5] = 0;
			regBptr[6] = 0;
			regBptr[7] = 0;
		}
#else
		*(int*)&regs.valueRegister = (*(int*)&regs.valueRegister < 0 ? 0 : VALUE_OF_BOOLEAN_TRUE);
#endif
		l_bc++;
		break;

	// If the value in the register is greater than 0, then set the register to 1, else to 0
	case asBC_TP:
#if AS_SIZEOF_BOOL == 1
		{
			// Set the value to true if it is greater than 0

			// We need to use volatile here to tell the compiler it cannot
			// change the order of read and write operations on valueRegister.

			volatile int    *regPtr  = (int*)&regs.valueRegister;
			volatile asBYTE *regBptr = (asBYTE*)&regs.valueRegister;
			asBYTE val = (regPtr[0] > 0) ? VALUE_OF_BOOLEAN_TRUE : 0;
			regBptr[0] = val; // The result is stored in the lower byte
			regBptr[1] = 0;   // Make sure the rest of the register is 0
			regBptr[2] = 0;
			regBptr[3] = 0;
			regBptr[4] = 0;
			regBptr[5] = 0;
			regBptr[6] = 0;
			regBptr[7] = 0;
		}
#else
		*(int*)&regs.valueRegister = (*(int*)&regs.valueRegister > 0 ? VALUE_OF_BOOLEAN_TRUE : 0);
#endif
		l_bc++;
		break;

	// If the value in the register is not greater than 0, then set the register to 1, else to 0
	case asBC_TNP:
#if AS_SIZEOF_BOOL == 1
		{
			// Set the value to true if it is not greater than 0

			// We need to use volatile here to tell the compiler it cannot
			// change the order of read and write operations on valueRegister.

			volatile int    *regPtr  = (int*)&regs.valueRegister;
			volatile asBYTE *regBptr = (asBYTE*)&regs.valueRegister;
			asBYTE val = (regPtr[0] <= 0) ? VALUE_OF_BOOLEAN_TRUE : 0;
			regBptr[0] = val; // The result is stored in the lower byte
			regBptr[1] = 0;   // Make sure the rest of the register is 0
			regBptr[2] = 0;
			regBptr[3] = 0;
			regBptr[4] = 0;
			regBptr[5] = 0;
			regBptr[6] = 0;
			regBptr[7] = 0;
		}
#else
		*(int*)&regs.valueRegister = (*(int*)&regs.valueRegister > 0 ? 0 : VALUE_OF_BOOLEAN_TRUE);
#endif
		l_bc++;
		break;

//--------------------
// negate value

	// Negate the integer value in the variable
	case asBC_NEGi:
		*(l_fp - asBC_SWORDARG0(l_bc)) = asDWORD(-int(*(l_fp - asBC_SWORDARG0(l_bc))));
		l_bc++;
		break;

	// Negate the float value in the variable
	case asBC_NEGf:
		*(float*)(l_fp - asBC_SWORDARG0(l_bc)) = -*(float*)(l_fp - asBC_SWORDARG0(l_bc));
		l_bc++;
		break;

	// Negate the double value in the variable
	case asBC_NEGd:
		*(double*)(l_fp - asBC_SWORDARG0(l_bc)) = -*(double*)(l_fp - asBC_SWORDARG0(l_bc));
		l_bc++;
		break;

//-------------------------
// Increment value pointed to by address in register

	// Increment the short value pointed to by the register
	case asBC_INCi16:
		(**(short**)&regs.valueRegister)++;
		l_bc++;
		break;

	// Increment the byte value pointed to by the register
	case asBC_INCi8:
		(**(char**)&regs.valueRegister)++;
		l_bc++;
		break;

	// Decrement the short value pointed to by the register
	case asBC_DECi16:
		(**(short**)&regs.valueRegister)--;
		l_bc++;
		break;

	// Decrement the byte value pointed to by the register
	case asBC_DECi8:
		(**(char**)&regs.valueRegister)--;
		l_bc++;
		break;

	// Increment the integer value pointed to by the register
	case asBC_INCi:
		++(**(int**)&regs.valueRegister);
		l_bc++;
		break;

	// Decrement the integer value pointed to by the register
	case asBC_DECi:
		--(**(int**)&regs.valueRegister);
		l_bc++;
		break;

	// Increment the float value pointed to by the register
	case asBC_INCf:
		++(**(float**)&regs.valueRegister);
		l_bc++;
		break;

	// Decrement the float value pointed to by the register
	case asBC_DECf:
		--(**(float**)&regs.valueRegister);
		l_bc++;
		break;

	// Increment the double value pointed to by the register
	case asBC_INCd:
		++(**(double**)&regs.valueRegister);
		l_bc++;
		break;

	// Decrement the double value pointed to by the register
	case asBC_DECd:
		--(**(double**)&regs.valueRegister);
		l_bc++;
		break;

	// Increment the local integer variable
	case asBC_IncVi:
		(*(int*)(l_fp - asBC_SWORDARG0(l_bc)))++;
		l_bc++;
		break;

	// Decrement the local integer variable
	case asBC_DecVi:
		(*(int*)(l_fp - asBC_SWORDARG0(l_bc)))--;
		l_bc++;
		break;

//--------------------
// bits instructions

	// Do a bitwise not on the value in the variable
	case asBC_BNOT:
		*(l_fp - asBC_SWORDARG0(l_bc)) = ~*(l_fp - asBC_SWORDARG0(l_bc));
		l_bc++;
		break;

	// Do a bitwise and of two variables and store the result in a third variable
	case asBC_BAND:
		*(l_fp - asBC_SWORDARG0(l_bc)) = *(l_fp - asBC_SWORDARG1(l_bc)) & *(l_fp - asBC_SWORDARG2(l_bc));
		l_bc += 2;
		break;

	// Do a bitwise or of two variables and store the result in a third variable
	case asBC_BOR:
		*(l_fp - asBC_SWORDARG0(l_bc)) = *(l_fp - asBC_SWORDARG1(l_bc)) | *(l_fp - asBC_SWORDARG2(l_bc));
		l_bc += 2;
		break;

	// Do a bitwise xor of two variables and store the result in a third variable
	case asBC_BXOR:
		*(l_fp - asBC_SWORDARG0(l_bc)) = *(l_fp - asBC_SWORDARG1(l_bc)) ^ *(l_fp - asBC_SWORDARG2(l_bc));
		l_bc += 2;
		break;

	// Do a logical shift left of two variables and store the result in a third variable
	case asBC_BSLL:
		*(l_fp - asBC_SWORDARG0(l_bc)) = *(l_fp - asBC_SWORDARG1(l_bc)) << *(l_fp - asBC_SWORDARG2(l_bc));
		l_bc += 2;
		break;

	// Do a logical shift right of two variables and store the result in a third variable
	case asBC_BSRL:
		*(l_fp - asBC_SWORDARG0(l_bc)) = *(l_fp - asBC_SWORDARG1(l_bc)) >> *(l_fp - asBC_SWORDARG2(l_bc));
		l_bc += 2;
		break;

	// Do an arithmetic shift right of two variables and store the result in a third variable
	case asBC_BSRA:
		*(l_fp - asBC_SWORDARG0(l_bc)) = int(*(l_fp - asBC_SWORDARG1(l_bc))) >> *(l_fp - asBC_SWORDARG2(l_bc));
		l_bc += 2;
		break;

	case asBC_COPY:
		{
			void *d = (void*)*(asPWORD*)l_sp; l_sp += AS_PTR_SIZE;
			void *s = (void*)*(asPWORD*)l_sp;
			if( s == 0 || d == 0 )
			{
				// Need to move the values back to the context
				regs.programPointer = l_bc;
				regs.stackPointer = l_sp;
				regs.stackFramePointer = l_fp;

				// Raise exception
				SetInternalException(TXT_NULL_POINTER_ACCESS);
				return;
			}
			memcpy(d, s, asBC_WORDARG0(l_bc)*4);

			// replace the pointer on the stack with the lvalue
			*(asPWORD**)l_sp = (asPWORD*)d;
		}
		l_bc += 2;
		break;

	case asBC_PshC8:
		l_sp -= 2;
		*(asQWORD*)l_sp = asBC_QWORDARG(l_bc);
		l_bc += 3;
		break;

	case asBC_PshVPtr:
		l_sp -= AS_PTR_SIZE;
		*(asPWORD*)l_sp = *(asPWORD*)(l_fp - asBC_SWORDARG0(l_bc));
		l_bc++;
		break;

	case asBC_RDSPtr:
		{
			// The pointer must not be null
			asPWORD a = *(asPWORD*)l_sp;
			if( a == 0 )
			{
				regs.programPointer = l_bc;
				regs.stackPointer = l_sp;
				regs.stackFramePointer = l_fp;

				SetInternalException(TXT_NULL_POINTER_ACCESS);
				return;
			}
			// Pop an address from the stack, read a pointer from that address and push it on the stack
			*(asPWORD*)l_sp = *(asPWORD*)a;
		}
		l_bc++;
		break;

	//----------------------------
	// Comparisons
	case asBC_CMPd:
		{
			double dbl = *(double*)(l_fp - asBC_SWORDARG0(l_bc)) - *(double*)(l_fp - asBC_SWORDARG1(l_bc));
			if( dbl == 0 )     *(int*)&regs.valueRegister =  0;
			else if( dbl < 0 ) *(int*)&regs.valueRegister = -1;
			else               *(int*)&regs.valueRegister =  1;
			l_bc += 2;
		}
		break;

	case asBC_CMPu:
		{
			asDWORD d = *(asDWORD*)(l_fp - asBC_SWORDARG0(l_bc));
			asDWORD d2 = *(asDWORD*)(l_fp - asBC_SWORDARG1(l_bc));
			if( d == d2 )     *(int*)&regs.valueRegister =  0;
			else if( d < d2 ) *(int*)&regs.valueRegister = -1;
			else              *(int*)&regs.valueRegister =  1;
			l_bc += 2;
		}
		break;

	case asBC_CMPf:
		{
			float f = *(float*)(l_fp - asBC_SWORDARG0(l_bc)) - *(float*)(l_fp - asBC_SWORDARG1(l_bc));
			if( f == 0 )     *(int*)&regs.valueRegister =  0;
			else if( f < 0 ) *(int*)&regs.valueRegister = -1;
			else             *(int*)&regs.valueRegister =  1;
			l_bc += 2;
		}
		break;

	case asBC_CMPi:
		{
			int i = *(int*)(l_fp - asBC_SWORDARG0(l_bc)) - *(int*)(l_fp - asBC_SWORDARG1(l_bc));
			if( i == 0 )     *(int*)&regs.valueRegister =  0;
			else if( i < 0 ) *(int*)&regs.valueRegister = -1;
			else             *(int*)&regs.valueRegister =  1;
			l_bc += 2;
		}
		break;

	//----------------------------
	// Comparisons with constant value
	case asBC_CMPIi:
		{
			int i = *(int*)(l_fp - asBC_SWORDARG0(l_bc)) - asBC_INTARG(l_bc);
			if( i == 0 )     *(int*)&regs.valueRegister =  0;
			else if( i < 0 ) *(int*)&regs.valueRegister = -1;
			else             *(int*)&regs.valueRegister =  1;
			l_bc += 2;
		}
		break;

	case asBC_CMPIf:
		{
			float f = *(float*)(l_fp - asBC_SWORDARG0(l_bc)) - asBC_FLOATARG(l_bc);
			if( f == 0 )     *(int*)&regs.valueRegister =  0;
			else if( f < 0 ) *(int*)&regs.valueRegister = -1;
			else             *(int*)&regs.valueRegister =  1;
			l_bc += 2;
		}
		break;

	case asBC_CMPIu:
		{
			asDWORD d1 = *(asDWORD*)(l_fp - asBC_SWORDARG0(l_bc));
			asDWORD d2 = asBC_DWORDARG(l_bc);
			if( d1 == d2 )     *(int*)&regs.valueRegister =  0;
			else if( d1 < d2 ) *(int*)&regs.valueRegister = -1;
			else               *(int*)&regs.valueRegister =  1;
			l_bc += 2;
		}
		break;

	case asBC_JMPP:
		l_bc += 1 + (*(int*)(l_fp - asBC_SWORDARG0(l_bc)))*2;
		break;

	case asBC_PopRPtr:
		*(asPWORD*)&regs.valueRegister = *(asPWORD*)l_sp;
		l_sp += AS_PTR_SIZE;
		l_bc++;
		break;

	case asBC_PshRPtr:
		l_sp -= AS_PTR_SIZE;
		*(asPWORD*)l_sp = *(asPWORD*)&regs.valueRegister;
		l_bc++;
		break;

	case asBC_STR:
		{
			// Get the string id from the argument
			asWORD w = asBC_WORDARG0(l_bc);
			// Push the string pointer on the stack
			const asCString &b = engine->GetConstantString(w);
			l_sp -= AS_PTR_SIZE;
			*(asPWORD*)l_sp = (asPWORD)b.AddressOf();
			// Push the string length on the stack
			--l_sp;
			*l_sp = (asDWORD)b.GetLength();
			l_bc++;
		}
		break;

	case asBC_CALLSYS:
		{
			// Get function ID from the argument
			int i = asBC_INTARG(l_bc);

			// Need to move the values back to the context as the called functions
			// may use the debug interface to inspect the registers
			regs.programPointer = l_bc;
			regs.stackPointer = l_sp;
			regs.stackFramePointer = l_fp;

			l_sp += CallSystemFunction(i, this, 0);

			// Update the program position after the call so that line number is correct
			l_bc += 2;

			if( regs.doProcessSuspend )
			{
				// Should the execution be suspended?
				if( doSuspend )
				{
					regs.programPointer = l_bc;
					regs.stackPointer = l_sp;
					regs.stackFramePointer = l_fp;

					status = asEXECUTION_SUSPENDED;
					return;
				}
				// An exception might have been raised
				if( status != asEXECUTION_ACTIVE )
				{
					regs.programPointer = l_bc;
					regs.stackPointer = l_sp;
					regs.stackFramePointer = l_fp;

					return;
				}
			}
		}
		break;

	case asBC_CALLBND:
		{
			// Get the function ID from the stack
			int i = asBC_INTARG(l_bc);
			l_bc += 2;

			asASSERT( i >= 0 );
			asASSERT( i & FUNC_IMPORTED );

			// Need to move the values back to the context
			regs.programPointer = l_bc;
			regs.stackPointer = l_sp;
			regs.stackFramePointer = l_fp;

			int funcId = engine->importedFunctions[i&0xFFFF]->boundFunctionId;
			if( funcId == -1 )
			{
				SetInternalException(TXT_UNBOUND_FUNCTION);
				return;
			}
			else
			{
				asCScriptFunction *func = engine->GetScriptFunction(funcId);

				CallScriptFunction(func);
			}

			// Extract the values from the context again
			l_bc = regs.programPointer;
			l_sp = regs.stackPointer;
			l_fp = regs.stackFramePointer;

			// If status isn't active anymore then we must stop
			if( status != asEXECUTION_ACTIVE )
				return;
		}
		break;

	case asBC_SUSPEND:
		if( regs.doProcessSuspend )
		{
			if( lineCallback )
			{
				regs.programPointer = l_bc;
				regs.stackPointer = l_sp;
				regs.stackFramePointer = l_fp;

				CallLineCallback();
			}
			if( doSuspend )
			{
				l_bc++;

				// Need to move the values back to the context
				regs.programPointer = l_bc;
				regs.stackPointer = l_sp;
				regs.stackFramePointer = l_fp;

				status = asEXECUTION_SUSPENDED;
				return;
			}
		}

		l_bc++;
		break;

	case asBC_ALLOC:
		{
			asCObjectType *objType = (asCObjectType*)asBC_PTRARG(l_bc);
			int func = asBC_INTARG(l_bc+AS_PTR_SIZE);

			if( objType->flags & asOBJ_SCRIPT_OBJECT )
			{
				// Pre-allocate the memory
				asDWORD *mem = (asDWORD*)engine->CallAlloc(objType);

				// Pre-initialize the memory by calling the constructor for asCScriptObject
				ScriptObject_Construct(objType, (asCScriptObject*)mem);

				// Call the constructor to initalize the memory
				asCScriptFunction *f = engine->scriptFunctions[func];

				asDWORD **a = (asDWORD**)*(asPWORD*)(l_sp + f->GetSpaceNeededForArguments());
				if( a ) *a = mem;

				// Push the object pointer on the stack
				l_sp -= AS_PTR_SIZE;
				*(asPWORD*)l_sp = (asPWORD)mem;

				l_bc += 2+AS_PTR_SIZE;

				// Need to move the values back to the context
				regs.programPointer = l_bc;
				regs.stackPointer = l_sp;
				regs.stackFramePointer = l_fp;

				CallScriptFunction(f);

				// Extract the values from the context again
				l_bc = regs.programPointer;
				l_sp = regs.stackPointer;
				l_fp = regs.stackFramePointer;

				// If status isn't active anymore then we must stop
				if( status != asEXECUTION_ACTIVE )
					return;
			}
			else
			{
				// Pre-allocate the memory
				asDWORD *mem = (asDWORD*)engine->CallAlloc(objType);

				if( func )
				{
					// Need to move the values back to the context as the called functions
					// may use the debug interface to inspect the registers
					regs.programPointer = l_bc;
					regs.stackPointer = l_sp;
					regs.stackFramePointer = l_fp;

					l_sp += CallSystemFunction(func, this, mem);
				}

				// Pop the variable address from the stack
				asDWORD **a = (asDWORD**)*(asPWORD*)l_sp;
				l_sp += AS_PTR_SIZE;
				if( a ) *a = mem;

				l_bc += 2+AS_PTR_SIZE;

				if( regs.doProcessSuspend )
				{
					// Should the execution be suspended?
					if( doSuspend )
					{
						regs.programPointer = l_bc;
						regs.stackPointer = l_sp;
						regs.stackFramePointer = l_fp;

						status = asEXECUTION_SUSPENDED;
						return;
					}
					// An exception might have been raised
					if( status != asEXECUTION_ACTIVE )
					{
						regs.programPointer = l_bc;
						regs.stackPointer = l_sp;
						regs.stackFramePointer = l_fp;

						engine->CallFree(mem);
						*a = 0;

						return;
					}
				}
			}
		}
		break;

	case asBC_FREE:
		{
			// Get the variable that holds the object handle/reference
			asPWORD *a = (asPWORD*)asPWORD(l_fp - asBC_SWORDARG0(l_bc));
			if( *a )
			{
				asCObjectType *objType = (asCObjectType*)asBC_PTRARG(l_bc);
				asSTypeBehaviour *beh = &objType->beh;

				// Need to move the values back to the context as the called functions
				// may use the debug interface to inspect the registers
				regs.programPointer = l_bc;
				regs.stackPointer = l_sp;
				regs.stackFramePointer = l_fp;

				if( objType->flags & asOBJ_REF )
				{
					asASSERT( (objType->flags & asOBJ_NOCOUNT) || beh->release );
					if( beh->release )
						engine->CallObjectMethod((void*)(asPWORD)*a, beh->release);
				}
				else
				{
					if( beh->destruct )
						engine->CallObjectMethod((void*)(asPWORD)*a, beh->destruct);

					engine->CallFree((void*)(asPWORD)*a);
				}

				// Clear the variable
				*a = 0;
			}
		}
		l_bc += 1+AS_PTR_SIZE;
		break;

	case asBC_LOADOBJ:
		{
			// Move the object pointer from the object variable into the object register
			void **a = (void**)(l_fp - asBC_SWORDARG0(l_bc));
			regs.objectType = 0;
			regs.objectRegister = *a;
			*a = 0;
		}
		l_bc++;
		break;

	case asBC_STOREOBJ:
		// Move the object pointer from the object register to the object variable
		*(asPWORD*)(l_fp - asBC_SWORDARG0(l_bc)) = asPWORD(regs.objectRegister);
		regs.objectRegister = 0;
		l_bc++;
		break;

	case asBC_GETOBJ:
		{
			// Read variable index from location on stack
			asPWORD *a = (asPWORD*)(l_sp + asBC_WORDARG0(l_bc));
			asDWORD offset = *(asDWORD*)a;
			// Move pointer from variable to the same location on the stack
			asPWORD *v = (asPWORD*)(l_fp - offset);
			*a = *v;
			// Clear variable
			*v = 0;
		}
		l_bc++;
		break;

	case asBC_REFCPY:
		{
			asCObjectType *objType = (asCObjectType*)asBC_PTRARG(l_bc);
			asSTypeBehaviour *beh = &objType->beh;

			// Pop address of destination pointer from the stack
			void **d = (void**)*(asPWORD*)l_sp;
			l_sp += AS_PTR_SIZE;
			
			// Read wanted pointer from the stack
			void *s = (void*)*(asPWORD*)l_sp;

			// Need to move the values back to the context as the called functions
			// may use the debug interface to inspect the registers
			regs.programPointer = l_bc;
			regs.stackPointer = l_sp;
			regs.stackFramePointer = l_fp;

			if( !(objType->flags & asOBJ_NOCOUNT) )
			{
				// Release previous object held by destination pointer
				if( *d != 0 )
					engine->CallObjectMethod(*d, beh->release);
				// Increase ref counter of wanted object
				if( s != 0 )
					engine->CallObjectMethod(s, beh->addref);
			}

			// Set the new object in the destination
			*d = s;
		}
		l_bc += 1+AS_PTR_SIZE;
		break;

	case asBC_CHKREF:
		{
			// Verify if the pointer on the stack is null
			// This is used when validating a pointer that an operator will work on
			asPWORD a = *(asPWORD*)l_sp;
			if( a == 0 )
			{
				regs.programPointer = l_bc;
				regs.stackPointer = l_sp;
				regs.stackFramePointer = l_fp;

				SetInternalException(TXT_NULL_POINTER_ACCESS);
				return;
			}
		}
		l_bc++;
		break;

	case asBC_GETOBJREF:
		{
			// Get the location on the stack where the reference will be placed
			asPWORD *a = (asPWORD*)(l_sp + asBC_WORDARG0(l_bc));

			// Replace the variable index with the object handle held in the variable
			*(asPWORD**)a = *(asPWORD**)(l_fp - *a);
		}
		l_bc++;
		break;

	case asBC_GETREF:
		{
			// Get the location on the stack where the reference will be placed
			asPWORD *a = (asPWORD*)(l_sp + asBC_WORDARG0(l_bc));

			// Replace the variable index with the address of the variable
			*(asPWORD**)a = (asPWORD*)(l_fp - (int)*a);
		}
		l_bc++;
		break;

	case asBC_PshNull:
		// Push a null pointer on the stack
		l_sp -= AS_PTR_SIZE;
		*(asPWORD*)l_sp = 0;
		l_bc++;
		break;

	case asBC_ClrVPtr:
		// TODO: optimize: Is this instruction really necessary? 
		//                 CallScriptFunction() can clear the null handles upon entry, just as is done for 
		//                 all other object variables
		// Clear pointer variable
		*(asPWORD*)(l_fp - asBC_SWORDARG0(l_bc)) = 0;
		l_bc++;
		break;

	case asBC_OBJTYPE:
		// Push the object type on the stack
		l_sp -= AS_PTR_SIZE;
		*(asPWORD*)l_sp = asBC_PTRARG(l_bc);
		l_bc += 1+AS_PTR_SIZE;
		break;

	case asBC_TYPEID:
		// Equivalent to PshC4, but kept as separate instruction for bytecode serialization
		--l_sp;
		*l_sp = asBC_DWORDARG(l_bc);
		l_bc += 2;
		break;

	case asBC_SetV4:
		*(l_fp - asBC_SWORDARG0(l_bc)) = asBC_DWORDARG(l_bc);
		l_bc += 2;
		break;

	case asBC_SetV8:
		*(asQWORD*)(l_fp - asBC_SWORDARG0(l_bc)) = asBC_QWORDARG(l_bc);
		l_bc += 3;
		break;

	case asBC_ADDSi:
		{
			// The pointer must not be null
			asPWORD a = *(asPWORD*)l_sp;
			if( a == 0 )
			{
				regs.programPointer = l_bc;
				regs.stackPointer = l_sp;
				regs.stackFramePointer = l_fp;

				SetInternalException(TXT_NULL_POINTER_ACCESS);
				return;
			}
			// Add an offset to the pointer
			*(asPWORD*)l_sp = a + asBC_SWORDARG0(l_bc);
		}
		l_bc += 2;
		break;

	case asBC_CpyVtoV4:
		*(l_fp - asBC_SWORDARG0(l_bc)) = *(l_fp - asBC_SWORDARG1(l_bc));
		l_bc += 2;
		break;

	case asBC_CpyVtoV8:
		*(asQWORD*)(l_fp - asBC_SWORDARG0(l_bc)) = *(asQWORD*)(l_fp - asBC_SWORDARG1(l_bc));
		l_bc += 2;
		break;

	case asBC_CpyVtoR4:
		*(asDWORD*)&regs.valueRegister = *(asDWORD*)(l_fp - asBC_SWORDARG0(l_bc));
		l_bc++;
		break;

	case asBC_CpyVtoR8:
		*(asQWORD*)&regs.valueRegister = *(asQWORD*)(l_fp - asBC_SWORDARG0(l_bc));
		l_bc++;
		break;

	case asBC_CpyVtoG4:
		*(asDWORD*)asBC_PTRARG(l_bc) = *(asDWORD*)(l_fp - asBC_SWORDARG0(l_bc));
		l_bc += 1 + AS_PTR_SIZE;
		break;

	case asBC_CpyRtoV4:
		*(asDWORD*)(l_fp - asBC_SWORDARG0(l_bc)) = *(asDWORD*)&regs.valueRegister;
		l_bc++;
		break;

	case asBC_CpyRtoV8:
		*(asQWORD*)(l_fp - asBC_SWORDARG0(l_bc)) = regs.valueRegister;
		l_bc++;
		break;

	case asBC_CpyGtoV4:
		*(asDWORD*)(l_fp - asBC_SWORDARG0(l_bc)) = *(asDWORD*)asBC_PTRARG(l_bc);
		l_bc += 1 + AS_PTR_SIZE;
		break;

	case asBC_WRTV1:
		// The pointer in the register points to a byte, and *(l_fp - offset) too
		**(asBYTE**)&regs.valueRegister = *(asBYTE*)(l_fp - asBC_SWORDARG0(l_bc));
		l_bc++;
		break;

	case asBC_WRTV2:
		// The pointer in the register points to a word, and *(l_fp - offset) too
		**(asWORD**)&regs.valueRegister = *(asWORD*)(l_fp - asBC_SWORDARG0(l_bc));
		l_bc++;
		break;

	case asBC_WRTV4:
		**(asDWORD**)&regs.valueRegister = *(l_fp - asBC_SWORDARG0(l_bc));
		l_bc++;
		break;

	case asBC_WRTV8:
		**(asQWORD**)&regs.valueRegister = *(asQWORD*)(l_fp - asBC_SWORDARG0(l_bc));
		l_bc++;
		break;

	case asBC_RDR1:
		{
			// The pointer in the register points to a byte, and *(l_fp - offset) will also point to a byte
			asBYTE *bPtr = (asBYTE*)(l_fp - asBC_SWORDARG0(l_bc));
			bPtr[0] = **(asBYTE**)&regs.valueRegister; // read the byte
			bPtr[1] = 0;                      // 0 the rest of the DWORD
			bPtr[2] = 0;
			bPtr[3] = 0;
		}
		l_bc++;
		break;

	case asBC_RDR2:
		{
			// The pointer in the register points to a word, and *(l_fp - offset) will also point to a word
			asWORD *wPtr = (asWORD*)(l_fp - asBC_SWORDARG0(l_bc));
			wPtr[0] = **(asWORD**)&regs.valueRegister; // read the word
			wPtr[1] = 0;                      // 0 the rest of the DWORD
		}
		l_bc++;
		break;

	case asBC_RDR4:
		*(asDWORD*)(l_fp - asBC_SWORDARG0(l_bc)) = **(asDWORD**)&regs.valueRegister;
		l_bc++;
		break;

	case asBC_RDR8:
		*(asQWORD*)(l_fp - asBC_SWORDARG0(l_bc)) = **(asQWORD**)&regs.valueRegister;
		l_bc++;
		break;

	case asBC_LDG:
		*(asPWORD*)&regs.valueRegister = asBC_PTRARG(l_bc);
		l_bc += 1+AS_PTR_SIZE;
		break;

	case asBC_LDV:
		*(asDWORD**)&regs.valueRegister = (l_fp - asBC_SWORDARG0(l_bc));
		l_bc++;
		break;

	case asBC_PGA:
		l_sp -= AS_PTR_SIZE;
		*(asPWORD*)l_sp = asBC_PTRARG(l_bc);
		l_bc += 1+AS_PTR_SIZE;
		break;

	case asBC_CmpPtr:
		{
			// TODO: runtime optimize: This instruction should really just be an equals, and return true or false.
			//                         The instruction is only used for is and !is tests anyway.
			asPWORD p1 = *(asPWORD*)(l_fp - asBC_SWORDARG0(l_bc));
			asPWORD p2 = *(asPWORD*)(l_fp - asBC_SWORDARG1(l_bc));
			if( p1 == p2 )     *(int*)&regs.valueRegister =  0;
			else if( p1 < p2 ) *(int*)&regs.valueRegister = -1;
			else               *(int*)&regs.valueRegister =  1;
			l_bc += 2;
		}
		break;

	case asBC_VAR:
		l_sp -= AS_PTR_SIZE;
		*(asPWORD*)l_sp = (asPWORD)asBC_SWORDARG0(l_bc);
		l_bc++;
		break;

	//----------------------------
	// Type conversions
	case asBC_iTOf:
		*(float*)(l_fp - asBC_SWORDARG0(l_bc)) = float(*(int*)(l_fp - asBC_SWORDARG0(l_bc)));
		l_bc++;
		break;

	case asBC_fTOi:
		*(l_fp - asBC_SWORDARG0(l_bc)) = int(*(float*)(l_fp - asBC_SWORDARG0(l_bc)));
		l_bc++;
		break;

	case asBC_uTOf:
		*(float*)(l_fp - asBC_SWORDARG0(l_bc)) = float(*(l_fp - asBC_SWORDARG0(l_bc)));
		l_bc++;
		break;

	case asBC_fTOu:
		// We must cast to int first, because on some compilers the cast of a negative float value to uint result in 0
		*(l_fp - asBC_SWORDARG0(l_bc)) = asUINT(int(*(float*)(l_fp - asBC_SWORDARG0(l_bc))));
		l_bc++;
		break;

	case asBC_sbTOi:
		// *(l_fp - offset) points to a char, and will point to an int afterwards
		*(l_fp - asBC_SWORDARG0(l_bc)) = *(signed char*)(l_fp - asBC_SWORDARG0(l_bc));
		l_bc++;
		break;

	case asBC_swTOi:
		// *(l_fp - offset) points to a short, and will point to an int afterwards
		*(l_fp - asBC_SWORDARG0(l_bc)) = *(short*)(l_fp - asBC_SWORDARG0(l_bc));
		l_bc++;
		break;

	case asBC_ubTOi:
		// (l_fp - offset) points to a byte, and will point to an int afterwards
		*(l_fp - asBC_SWORDARG0(l_bc)) = *(asBYTE*)(l_fp - asBC_SWORDARG0(l_bc));
		l_bc++;
		break;

	case asBC_uwTOi:
		// *(l_fp - offset) points to a word, and will point to an int afterwards
		*(l_fp - asBC_SWORDARG0(l_bc)) = *(asWORD*)(l_fp - asBC_SWORDARG0(l_bc));
		l_bc++;
		break;

	case asBC_dTOi:
		*(l_fp - asBC_SWORDARG0(l_bc)) = int(*(double*)(l_fp - asBC_SWORDARG1(l_bc)));
		l_bc += 2;
		break;

	case asBC_dTOu:
		// We must cast to int first, because on some compilers the cast of a negative float value to uint result in 0
		*(l_fp - asBC_SWORDARG0(l_bc)) = asUINT(int(*(double*)(l_fp - asBC_SWORDARG1(l_bc))));
		l_bc += 2;
		break;

	case asBC_dTOf:
		*(float*)(l_fp - asBC_SWORDARG0(l_bc)) = float(*(double*)(l_fp - asBC_SWORDARG1(l_bc)));
		l_bc += 2;
		break;

	case asBC_iTOd:
		*(double*)(l_fp - asBC_SWORDARG0(l_bc)) = double(*(int*)(l_fp - asBC_SWORDARG1(l_bc)));
		l_bc += 2;
		break;

	case asBC_uTOd:
		*(double*)(l_fp - asBC_SWORDARG0(l_bc)) = double(*(asUINT*)(l_fp - asBC_SWORDARG1(l_bc)));
		l_bc += 2;
		break;

	case asBC_fTOd:
		*(double*)(l_fp - asBC_SWORDARG0(l_bc)) = double(*(float*)(l_fp - asBC_SWORDARG1(l_bc)));
		l_bc += 2;
		break;

	//------------------------------
	// Math operations
	case asBC_ADDi:
		*(int*)(l_fp - asBC_SWORDARG0(l_bc)) = *(int*)(l_fp - asBC_SWORDARG1(l_bc)) + *(int*)(l_fp - asBC_SWORDARG2(l_bc));
		l_bc += 2;
		break;

	case asBC_SUBi:
		*(int*)(l_fp - asBC_SWORDARG0(l_bc)) = *(int*)(l_fp - asBC_SWORDARG1(l_bc)) - *(int*)(l_fp - asBC_SWORDARG2(l_bc));
		l_bc += 2;
		break;

	case asBC_MULi:
		*(int*)(l_fp - asBC_SWORDARG0(l_bc)) = *(int*)(l_fp - asBC_SWORDARG1(l_bc)) * *(int*)(l_fp - asBC_SWORDARG2(l_bc));
		l_bc += 2;
		break;

	case asBC_DIVi:
		{
			int divider = *(int*)(l_fp - asBC_SWORDARG2(l_bc));
			if( divider == 0 )
			{
				// Need to move the values back to the context
				regs.programPointer = l_bc;
				regs.stackPointer = l_sp;
				regs.stackFramePointer = l_fp;

				// Raise exception
				SetInternalException(TXT_DIVIDE_BY_ZERO);
				return;
			}
			*(int*)(l_fp - asBC_SWORDARG0(l_bc)) = *(int*)(l_fp - asBC_SWORDARG1(l_bc)) / divider;
		}
		l_bc += 2;
		break;

	case asBC_MODi:
		{
			int divider = *(int*)(l_fp - asBC_SWORDARG2(l_bc));
			if( divider == 0 )
			{
				// Need to move the values back to the context
				regs.programPointer = l_bc;
				regs.stackPointer = l_sp;
				regs.stackFramePointer = l_fp;

				// Raise exception
				SetInternalException(TXT_DIVIDE_BY_ZERO);
				return;
			}
			*(int*)(l_fp - asBC_SWORDARG0(l_bc)) = *(int*)(l_fp - asBC_SWORDARG1(l_bc)) % divider;
		}
		l_bc += 2;
		break;

	case asBC_ADDf:
		*(float*)(l_fp - asBC_SWORDARG0(l_bc)) = *(float*)(l_fp - asBC_SWORDARG1(l_bc)) + *(float*)(l_fp - asBC_SWORDARG2(l_bc));
		l_bc += 2;
		break;

	case asBC_SUBf:
		*(float*)(l_fp - asBC_SWORDARG0(l_bc)) = *(float*)(l_fp - asBC_SWORDARG1(l_bc)) - *(float*)(l_fp - asBC_SWORDARG2(l_bc));
		l_bc += 2;
		break;

	case asBC_MULf:
		*(float*)(l_fp - asBC_SWORDARG0(l_bc)) = *(float*)(l_fp - asBC_SWORDARG1(l_bc)) * *(float*)(l_fp - asBC_SWORDARG2(l_bc));
		l_bc += 2;
		break;

	case asBC_DIVf:
		{
			float divider = *(float*)(l_fp - asBC_SWORDARG2(l_bc));
			if( divider == 0 )
			{
				// Need to move the values back to the context
				regs.programPointer = l_bc;
				regs.stackPointer = l_sp;
				regs.stackFramePointer = l_fp;

				// Raise exception
				SetInternalException(TXT_DIVIDE_BY_ZERO);
				return;
			}
			*(float*)(l_fp - asBC_SWORDARG0(l_bc)) = *(float*)(l_fp - asBC_SWORDARG1(l_bc)) / divider;
		}
		l_bc += 2;
		break;

	case asBC_MODf:
		{
			float divider = *(float*)(l_fp - asBC_SWORDARG2(l_bc));
			if( divider == 0 )
			{
				// Need to move the values back to the context
				regs.programPointer = l_bc;
				regs.stackPointer = l_sp;
				regs.stackFramePointer = l_fp;

				// Raise exception
				SetInternalException(TXT_DIVIDE_BY_ZERO);
				return;
			}
			*(float*)(l_fp - asBC_SWORDARG0(l_bc)) = fmodf(*(float*)(l_fp - asBC_SWORDARG1(l_bc)), divider);
		}
		l_bc += 2;
		break;

	case asBC_ADDd:
		*(double*)(l_fp - asBC_SWORDARG0(l_bc)) = *(double*)(l_fp - asBC_SWORDARG1(l_bc)) + *(double*)(l_fp - asBC_SWORDARG2(l_bc));
		l_bc += 2;
		break;

	case asBC_SUBd:
		*(double*)(l_fp - asBC_SWORDARG0(l_bc)) = *(double*)(l_fp - asBC_SWORDARG1(l_bc)) - *(double*)(l_fp - asBC_SWORDARG2(l_bc));
		l_bc += 2;
		break;

	case asBC_MULd:
		*(double*)(l_fp - asBC_SWORDARG0(l_bc)) = *(double*)(l_fp - asBC_SWORDARG1(l_bc)) * *(double*)(l_fp - asBC_SWORDARG2(l_bc));
		l_bc += 2;
		break;

	case asBC_DIVd:
		{
			double divider = *(double*)(l_fp - asBC_SWORDARG2(l_bc));
			if( divider == 0 )
			{
				// Need to move the values back to the context
				regs.programPointer = l_bc;
				regs.stackPointer = l_sp;
				regs.stackFramePointer = l_fp;

				// Raise exception
				SetInternalException(TXT_DIVIDE_BY_ZERO);
				return;
			}

			*(double*)(l_fp - asBC_SWORDARG0(l_bc)) = *(double*)(l_fp - asBC_SWORDARG1(l_bc)) / divider;
			l_bc += 2;
		}
		break;

	case asBC_MODd:
		{
			double divider = *(double*)(l_fp - asBC_SWORDARG2(l_bc));
			if( divider == 0 )
			{
				// Need to move the values back to the context
				regs.programPointer = l_bc;
				regs.stackPointer = l_sp;
				regs.stackFramePointer = l_fp;

				// Raise exception
				SetInternalException(TXT_DIVIDE_BY_ZERO);
				return;
			}

			*(double*)(l_fp - asBC_SWORDARG0(l_bc)) = fmod(*(double*)(l_fp - asBC_SWORDARG1(l_bc)), divider);
			l_bc += 2;
		}
		break;

	//------------------------------
	// Math operations with constant value
	case asBC_ADDIi:
		*(int*)(l_fp - asBC_SWORDARG0(l_bc)) = *(int*)(l_fp - asBC_SWORDARG1(l_bc)) + asBC_INTARG(l_bc+1);
		l_bc += 3;
		break;

	case asBC_SUBIi:
		*(int*)(l_fp - asBC_SWORDARG0(l_bc)) = *(int*)(l_fp - asBC_SWORDARG1(l_bc)) - asBC_INTARG(l_bc+1);
		l_bc += 3;
		break;

	case asBC_MULIi:
		*(int*)(l_fp - asBC_SWORDARG0(l_bc)) = *(int*)(l_fp - asBC_SWORDARG1(l_bc)) * asBC_INTARG(l_bc+1);
		l_bc += 3;
		break;

	case asBC_ADDIf:
		*(float*)(l_fp - asBC_SWORDARG0(l_bc)) = *(float*)(l_fp - asBC_SWORDARG1(l_bc)) + asBC_FLOATARG(l_bc+1);
		l_bc += 3;
		break;

	case asBC_SUBIf:
		*(float*)(l_fp - asBC_SWORDARG0(l_bc)) = *(float*)(l_fp - asBC_SWORDARG1(l_bc)) - asBC_FLOATARG(l_bc+1);
		l_bc += 3;
		break;

	case asBC_MULIf:
		*(float*)(l_fp - asBC_SWORDARG0(l_bc)) = *(float*)(l_fp - asBC_SWORDARG1(l_bc)) * asBC_FLOATARG(l_bc+1);
		l_bc += 3;
		break;

	//-----------------------------------
	case asBC_SetG4:
		*(asDWORD*)asBC_PTRARG(l_bc) = asBC_DWORDARG(l_bc+AS_PTR_SIZE);
		l_bc += 2 + AS_PTR_SIZE;
		break;

	case asBC_ChkRefS:
		{
			// Verify if the pointer on the stack refers to a non-null value
			// This is used to validate a reference to a handle
			asPWORD *a = (asPWORD*)*(asPWORD*)l_sp;
			if( *a == 0 )
			{
				regs.programPointer = l_bc;
				regs.stackPointer = l_sp;
				regs.stackFramePointer = l_fp;

				SetInternalException(TXT_NULL_POINTER_ACCESS);
				return;
			}
		}
		l_bc++;
		break;

	case asBC_ChkNullV:
		{
			// Verify if variable (on the stack) is not null
			asDWORD *a = *(asDWORD**)(l_fp - asBC_SWORDARG0(l_bc));
			if( a == 0 )
			{
				regs.programPointer = l_bc;
				regs.stackPointer = l_sp;
				regs.stackFramePointer = l_fp;

				SetInternalException(TXT_NULL_POINTER_ACCESS);
				return;
			}
		}
		l_bc++;
		break;

	case asBC_CALLINTF:
		{
			int i = asBC_INTARG(l_bc);
			l_bc += 2;

			asASSERT( i >= 0 );
			asASSERT( (i & FUNC_IMPORTED) == 0 );

			// Need to move the values back to the context
			regs.programPointer = l_bc;
			regs.stackPointer = l_sp;
			regs.stackFramePointer = l_fp;

			CallInterfaceMethod(engine->GetScriptFunction(i));

			// Extract the values from the context again
			l_bc = regs.programPointer;
			l_sp = regs.stackPointer;
			l_fp = regs.stackFramePointer;

			// If status isn't active anymore then we must stop
			if( status != asEXECUTION_ACTIVE )
				return;
		}
		break;

	case asBC_iTOb:
		{
			// *(l_fp - offset) points to an int, and will point to a byte afterwards

			// We need to use volatile here to tell the compiler not to rearrange
			// read and write operations during optimizations.
			volatile asDWORD val  = *(l_fp - asBC_SWORDARG0(l_bc));
			volatile asBYTE *bPtr = (asBYTE*)(l_fp - asBC_SWORDARG0(l_bc));
			bPtr[0] = (asBYTE)val; // write the byte
			bPtr[1] = 0;           // 0 the rest of the DWORD
			bPtr[2] = 0;
			bPtr[3] = 0;
		}
		l_bc++;
		break;

	case asBC_iTOw:
		{
			// *(l_fp - offset) points to an int, and will point to word afterwards

			// We need to use volatile here to tell the compiler not to rearrange
			// read and write operations during optimizations.
			volatile asDWORD val  = *(l_fp - asBC_SWORDARG0(l_bc));
			volatile asWORD *wPtr = (asWORD*)(l_fp - asBC_SWORDARG0(l_bc));
			wPtr[0] = (asWORD)val; // write the word
			wPtr[1] = 0;           // 0 the rest of the DWORD
		}
		l_bc++;
		break;

	case asBC_SetV1:
		// TODO: This is exactly the same as SetV4. This is a left over from the time
		//       when the bytecode instructions were more tightly packed. It can now
		//       be removed. When removing it, make sure the value is correctly converted
		//       on big-endian CPUs.

		// The byte is already stored correctly in the argument
		*(l_fp - asBC_SWORDARG0(l_bc)) = asBC_DWORDARG(l_bc);
		l_bc += 2;
		break;

	case asBC_SetV2:
		// TODO: This is exactly the same as SetV4. This is a left over from the time
		//       when the bytecode instructions were more tightly packed. It can now
		//       be removed. When removing it, make sure the value is correctly converted
		//       on big-endian CPUs.

		// The word is already stored correctly in the argument
		*(l_fp - asBC_SWORDARG0(l_bc)) = asBC_DWORDARG(l_bc);
		l_bc += 2;
		break;

	case asBC_Cast:
		// Cast the handle at the top of the stack to the type in the argument
		{
			asDWORD **a = (asDWORD**)*(asPWORD*)l_sp;
			if( a && *a )
			{
				asDWORD typeId = asBC_DWORDARG(l_bc);

				asCScriptObject *obj = (asCScriptObject *)* a;
				asCObjectType *objType = obj->objType;
				asCObjectType *to = engine->GetObjectTypeFromTypeId(typeId);

				// This instruction can only be used with script classes and interfaces
				asASSERT( objType->flags & asOBJ_SCRIPT_OBJECT );
				asASSERT( to->flags & asOBJ_SCRIPT_OBJECT );

				if( objType->Implements(to) || objType->DerivesFrom(to) )
				{
					regs.objectType = 0;
					regs.objectRegister = obj;
					obj->AddRef();
				}
				else
				{
					// The object register should already be null, so there  
					// is no need to clear it if the cast is unsuccessful
					asASSERT( regs.objectRegister == 0 );
				}
			}
			l_sp += AS_PTR_SIZE;
		}
		l_bc += 2;
		break;

	case asBC_i64TOi:
		*(l_fp - asBC_SWORDARG0(l_bc)) = int(*(asINT64*)(l_fp - asBC_SWORDARG1(l_bc)));
		l_bc += 2;
		break;

	case asBC_uTOi64:
		*(asINT64*)(l_fp - asBC_SWORDARG0(l_bc)) = asINT64(*(asUINT*)(l_fp - asBC_SWORDARG1(l_bc)));
		l_bc += 2;
		break;

	case asBC_iTOi64:
		*(asINT64*)(l_fp - asBC_SWORDARG0(l_bc)) = asINT64(*(int*)(l_fp - asBC_SWORDARG1(l_bc)));
		l_bc += 2;
		break;

	case asBC_fTOi64:
		*(asINT64*)(l_fp - asBC_SWORDARG0(l_bc)) = asINT64(*(float*)(l_fp - asBC_SWORDARG1(l_bc)));
		l_bc += 2;
		break;

	case asBC_dTOi64:
		*(asINT64*)(l_fp - asBC_SWORDARG0(l_bc)) = asINT64(*(double*)(l_fp - asBC_SWORDARG0(l_bc)));
		l_bc++;
		break;

	case asBC_fTOu64:
		*(asQWORD*)(l_fp - asBC_SWORDARG0(l_bc)) = asQWORD(asINT64(*(float*)(l_fp - asBC_SWORDARG1(l_bc))));
		l_bc += 2;
		break;

	case asBC_dTOu64:
		*(asQWORD*)(l_fp - asBC_SWORDARG0(l_bc)) = asQWORD(asINT64(*(double*)(l_fp - asBC_SWORDARG0(l_bc))));
		l_bc++;
		break;

	case asBC_i64TOf:
		*(float*)(l_fp - asBC_SWORDARG0(l_bc)) = float(*(asINT64*)(l_fp - asBC_SWORDARG1(l_bc)));
		l_bc += 2;
		break;

	case asBC_u64TOf:
#if _MSC_VER <= 1200 // MSVC6 
		{
			// MSVC6 doesn't permit UINT64 to double
			asINT64 v = *(asINT64*)(l_fp - asBC_SWORDARG1(l_bc));
			if( v < 0 )
				*(float*)(l_fp - asBC_SWORDARG0(l_bc)) = 18446744073709551615.0f+float(v);
			else
				*(float*)(l_fp - asBC_SWORDARG0(l_bc)) = float(v);
		}
#else
		*(float*)(l_fp - asBC_SWORDARG0(l_bc)) = float(*(asQWORD*)(l_fp - asBC_SWORDARG1(l_bc)));
#endif
		l_bc += 2;
		break;

	case asBC_i64TOd:
		*(double*)(l_fp - asBC_SWORDARG0(l_bc)) = double(*(asINT64*)(l_fp - asBC_SWORDARG0(l_bc)));
		l_bc++;
		break;

	case asBC_u64TOd:
#if _MSC_VER <= 1200 // MSVC6 
		{
			// MSVC6 doesn't permit UINT64 to double
			asINT64 v = *(asINT64*)(l_fp - asBC_SWORDARG0(l_bc));
			if( v < 0 )
				*(double*)(l_fp - asBC_SWORDARG0(l_bc)) = 18446744073709551615.0+double(v);
			else
				*(double*)(l_fp - asBC_SWORDARG0(l_bc)) = double(v);
		}
#else
		*(double*)(l_fp - asBC_SWORDARG0(l_bc)) = double(*(asQWORD*)(l_fp - asBC_SWORDARG0(l_bc)));
#endif
		l_bc++;
		break;

	case asBC_NEGi64:
		*(asINT64*)(l_fp - asBC_SWORDARG0(l_bc)) = -*(asINT64*)(l_fp - asBC_SWORDARG0(l_bc));
		l_bc++;
		break;

	case asBC_INCi64:
		++(**(asQWORD**)&regs.valueRegister);
		l_bc++;
		break;

	case asBC_DECi64:
		--(**(asQWORD**)&regs.valueRegister);
		l_bc++;
		break;

	case asBC_BNOT64:
		*(asQWORD*)(l_fp - asBC_SWORDARG0(l_bc)) = ~*(asQWORD*)(l_fp - asBC_SWORDARG0(l_bc));
		l_bc++;
		break;

	case asBC_ADDi64:
		*(asQWORD*)(l_fp - asBC_SWORDARG0(l_bc)) = *(asQWORD*)(l_fp - asBC_SWORDARG1(l_bc)) + *(asQWORD*)(l_fp - asBC_SWORDARG2(l_bc));
		l_bc += 2;
		break;

	case asBC_SUBi64:
		*(asQWORD*)(l_fp - asBC_SWORDARG0(l_bc)) = *(asQWORD*)(l_fp - asBC_SWORDARG1(l_bc)) - *(asQWORD*)(l_fp - asBC_SWORDARG2(l_bc));
		l_bc += 2;
		break;

	case asBC_MULi64:
		*(asQWORD*)(l_fp - asBC_SWORDARG0(l_bc)) = *(asQWORD*)(l_fp - asBC_SWORDARG1(l_bc)) * *(asQWORD*)(l_fp - asBC_SWORDARG2(l_bc));
		l_bc += 2;
		break;

	case asBC_DIVi64:
		{
			asINT64 divider = *(asINT64*)(l_fp - asBC_SWORDARG2(l_bc));
			if( divider == 0 )
			{
				// Need to move the values back to the context
				regs.programPointer = l_bc;
				regs.stackPointer = l_sp;
				regs.stackFramePointer = l_fp;

				// Raise exception
				SetInternalException(TXT_DIVIDE_BY_ZERO);
				return;
			}
			*(asINT64*)(l_fp - asBC_SWORDARG0(l_bc)) = *(asINT64*)(l_fp - asBC_SWORDARG1(l_bc)) / divider;
		}
		l_bc += 2;
		break;

	case asBC_MODi64:
		{
			asINT64 divider = *(asINT64*)(l_fp - asBC_SWORDARG2(l_bc));
			if( divider == 0 )
			{
				// Need to move the values back to the context
				regs.programPointer = l_bc;
				regs.stackPointer = l_sp;
				regs.stackFramePointer = l_fp;

				// Raise exception
				SetInternalException(TXT_DIVIDE_BY_ZERO);
				return;
			}
			*(asINT64*)(l_fp - asBC_SWORDARG0(l_bc)) = *(asINT64*)(l_fp - asBC_SWORDARG1(l_bc)) % divider;
		}
		l_bc += 2;
		break;

	case asBC_BAND64:
		*(asQWORD*)(l_fp - asBC_SWORDARG0(l_bc)) = *(asQWORD*)(l_fp - asBC_SWORDARG1(l_bc)) & *(asQWORD*)(l_fp - asBC_SWORDARG2(l_bc));
		l_bc += 2;
		break;

	case asBC_BOR64:
		*(asQWORD*)(l_fp - asBC_SWORDARG0(l_bc)) = *(asQWORD*)(l_fp - asBC_SWORDARG1(l_bc)) | *(asQWORD*)(l_fp - asBC_SWORDARG2(l_bc));
		l_bc += 2;
		break;

	case asBC_BXOR64:
		*(asQWORD*)(l_fp - asBC_SWORDARG0(l_bc)) = *(asQWORD*)(l_fp - asBC_SWORDARG1(l_bc)) ^ *(asQWORD*)(l_fp - asBC_SWORDARG2(l_bc));
		l_bc += 2;
		break;

	case asBC_BSLL64:
		*(asQWORD*)(l_fp - asBC_SWORDARG0(l_bc)) = *(asQWORD*)(l_fp - asBC_SWORDARG1(l_bc)) << *(l_fp - asBC_SWORDARG2(l_bc));
		l_bc += 2;
		break;

	case asBC_BSRL64:
		*(asQWORD*)(l_fp - asBC_SWORDARG0(l_bc)) = *(asQWORD*)(l_fp - asBC_SWORDARG1(l_bc)) >> *(l_fp - asBC_SWORDARG2(l_bc));
		l_bc += 2;
		break;

	case asBC_BSRA64:
		*(asINT64*)(l_fp - asBC_SWORDARG0(l_bc)) = *(asINT64*)(l_fp - asBC_SWORDARG1(l_bc)) >> *(l_fp - asBC_SWORDARG2(l_bc));
		l_bc += 2;
		break;

	case asBC_CMPi64:
		{
			asINT64 i = *(asINT64*)(l_fp - asBC_SWORDARG0(l_bc)) - *(asINT64*)(l_fp - asBC_SWORDARG1(l_bc));
			if( i == 0 )     *(int*)&regs.valueRegister =  0;
			else if( i < 0 ) *(int*)&regs.valueRegister = -1;
			else             *(int*)&regs.valueRegister =  1;
			l_bc += 2;
		}
		break;

	case asBC_CMPu64:
		{
			asQWORD d = *(asQWORD*)(l_fp - asBC_SWORDARG0(l_bc));
			asQWORD d2 = *(asQWORD*)(l_fp - asBC_SWORDARG1(l_bc));
			if( d == d2 )     *(int*)&regs.valueRegister =  0;
			else if( d < d2 ) *(int*)&regs.valueRegister = -1;
			else              *(int*)&regs.valueRegister =  1;
			l_bc += 2;
		}
		break;

	case asBC_ChkNullS:
		{
			// Verify if the pointer on the stack is null
			// This is used for example when validating handles passed as function arguments
			asPWORD a = *(asPWORD*)(l_sp + asBC_WORDARG0(l_bc));
			if( a == 0 )
			{
				regs.programPointer = l_bc;
				regs.stackPointer = l_sp;
				regs.stackFramePointer = l_fp;

				SetInternalException(TXT_NULL_POINTER_ACCESS);
				return;
			}
		}
		l_bc++;
		break;

	case asBC_ClrHi:
#if AS_SIZEOF_BOOL == 1
		{
			// Clear the upper bytes, so that trash data don't interfere with boolean operations

			// We need to use volatile here to tell the compiler it cannot
			// change the order of read and write operations on the pointer.

			volatile asBYTE *ptr = (asBYTE*)&regs.valueRegister;
			ptr[1] = 0;   // The boolean value is stored in the lower byte, so we clear the rest
			ptr[2] = 0;
			ptr[3] = 0;
		}
#else
		// We don't have anything to do here
#endif
		l_bc++;
		break;

	case asBC_JitEntry:
		{
			if( currentFunction->jitFunction )
			{
				asPWORD jitArg = asBC_PTRARG(l_bc);

				if( jitArg )
				{
					// Resume JIT operation
					regs.programPointer = l_bc;
					regs.stackPointer = l_sp;
					regs.stackFramePointer = l_fp;

					(currentFunction->jitFunction)(&regs, jitArg);
				
					l_bc = regs.programPointer;
					l_sp = regs.stackPointer;
					l_fp = regs.stackFramePointer;

					// If status isn't active anymore then we must stop
					if( status != asEXECUTION_ACTIVE )
						return;
				
					break;
				}
			}

			// Not a JIT resume point, treat as nop
			l_bc += 1+AS_PTR_SIZE;
		}
		break;

	case asBC_CallPtr:
		{
			// Get the function pointer from the local variable
			asCScriptFunction *func = *(asCScriptFunction**)(l_fp - asBC_SWORDARG0(l_bc));

			// Need to move the values back to the context
			regs.programPointer = l_bc;
			regs.stackPointer = l_sp;
			regs.stackFramePointer = l_fp;

			if( func == 0 )
			{
				// TODO: funcdef: Should we have a different exception string?
				SetInternalException(TXT_UNBOUND_FUNCTION);
				return;
			}
			else
			{
				if( func->funcType == asFUNC_SCRIPT )
				{
					regs.programPointer++;
					CallScriptFunction(func);
				}
				else
				{
					asASSERT( func->funcType == asFUNC_SYSTEM );

					regs.stackPointer += CallSystemFunction(func->id, this, 0);

					// Update program position after the call so the line number  
					// is correct in case the system function queries it
					regs.programPointer++;
				}
			}

			// Extract the values from the context again
			l_bc = regs.programPointer;
			l_sp = regs.stackPointer;
			l_fp = regs.stackFramePointer;

			// If status isn't active anymore then we must stop
			if( status != asEXECUTION_ACTIVE )
				return;
		}
		break;

	case asBC_FuncPtr:
		// Push the function pointer on the stack. The pointer is in the argument
		l_sp -= AS_PTR_SIZE;
		*(asPWORD*)l_sp = asBC_PTRARG(l_bc);
		l_bc += 1+AS_PTR_SIZE;
		break;

	case asBC_LoadThisR:
		{
			// PshVPtr 0
			asPWORD tmp = *(asPWORD*)l_fp;

			// Make sure the pointer is not null
			if( tmp == 0 )
			{
				// Need to move the values back to the context
				regs.programPointer = l_bc;
				regs.stackPointer = l_sp;
				regs.stackFramePointer = l_fp;

				// Raise exception
				SetInternalException(TXT_NULL_POINTER_ACCESS);
				return;
			}

			// ADDSi
			tmp = tmp + asBC_SWORDARG0(l_bc);

			// PopRPtr
			*(asPWORD*)&regs.valueRegister = tmp;
			l_bc += 2;
		}
		break;

	// Push the qword value of a variable on the stack
	case asBC_PshV8:
		l_sp -= 2;
		*(asQWORD*)l_sp = *(asQWORD*)(l_fp - asBC_SWORDARG0(l_bc));
		l_bc++;
		break;

	case asBC_DIVu:
		{
			asUINT divider = *(asUINT*)(l_fp - asBC_SWORDARG2(l_bc));
			if( divider == 0 )
			{
				// Need to move the values back to the context
				regs.programPointer = l_bc;
				regs.stackPointer = l_sp;
				regs.stackFramePointer = l_fp;

				// Raise exception
				SetInternalException(TXT_DIVIDE_BY_ZERO);
				return;
			}
			*(asUINT*)(l_fp - asBC_SWORDARG0(l_bc)) = *(asUINT*)(l_fp - asBC_SWORDARG1(l_bc)) / divider;
		}
		l_bc += 2;
		break;

	case asBC_MODu:
		{
			asUINT divider = *(asUINT*)(l_fp - asBC_SWORDARG2(l_bc));
			if( divider == 0 )
			{
				// Need to move the values back to the context
				regs.programPointer = l_bc;
				regs.stackPointer = l_sp;
				regs.stackFramePointer = l_fp;

				// Raise exception
				SetInternalException(TXT_DIVIDE_BY_ZERO);
				return;
			}
			*(asUINT*)(l_fp - asBC_SWORDARG0(l_bc)) = *(asUINT*)(l_fp - asBC_SWORDARG1(l_bc)) % divider;
		}
		l_bc += 2;
		break;

	case asBC_DIVu64:
		{
			asQWORD divider = *(asQWORD*)(l_fp - asBC_SWORDARG2(l_bc));
			if( divider == 0 )
			{
				// Need to move the values back to the context
				regs.programPointer = l_bc;
				regs.stackPointer = l_sp;
				regs.stackFramePointer = l_fp;

				// Raise exception
				SetInternalException(TXT_DIVIDE_BY_ZERO);
				return;
			}
			*(asQWORD*)(l_fp - asBC_SWORDARG0(l_bc)) = *(asQWORD*)(l_fp - asBC_SWORDARG1(l_bc)) / divider;
		}
		l_bc += 2;
		break;

	case asBC_MODu64:
		{
			asQWORD divider = *(asQWORD*)(l_fp - asBC_SWORDARG2(l_bc));
			if( divider == 0 )
			{
				// Need to move the values back to the context
				regs.programPointer = l_bc;
				regs.stackPointer = l_sp;
				regs.stackFramePointer = l_fp;

				// Raise exception
				SetInternalException(TXT_DIVIDE_BY_ZERO);
				return;
			}
			*(asQWORD*)(l_fp - asBC_SWORDARG0(l_bc)) = *(asQWORD*)(l_fp - asBC_SWORDARG1(l_bc)) % divider;
		}
		l_bc += 2;
		break;

	case asBC_LoadRObjR:
		{
			// PshVPtr x
			asPWORD tmp = *(asPWORD*)(l_fp - asBC_SWORDARG0(l_bc)); 

			// Make sure the pointer is not null
			if( tmp == 0 )
			{
				// Need to move the values back to the context
				regs.programPointer = l_bc;
				regs.stackPointer = l_sp;
				regs.stackFramePointer = l_fp;

				// Raise exception
				SetInternalException(TXT_NULL_POINTER_ACCESS);
				return;
			}

			// ADDSi y
			tmp = tmp + asBC_SWORDARG1(l_bc);

			// PopRPtr
			*(asPWORD*)&regs.valueRegister = tmp;
			l_bc += 3;
		}
		break;

	case asBC_LoadVObjR:
		{
			// PSF x
			asPWORD tmp = (asPWORD)(l_fp - asBC_SWORDARG0(l_bc)); 

			// ADDSi y
			tmp = tmp + asBC_SWORDARG1(l_bc);

			// PopRPtr
			*(asPWORD*)&regs.valueRegister = tmp;
			l_bc += 3;
		}
		break;

	case asBC_RefCpyV:
		// Same as PSF v, REFCPY
		{
			asCObjectType *objType = (asCObjectType*)asBC_PTRARG(l_bc);
			asSTypeBehaviour *beh = &objType->beh;

			// Determine destination from argument
			void **d = (void**)asPWORD(l_fp - asBC_SWORDARG0(l_bc));
			
			// Read wanted pointer from the stack
			void *s = (void*)*(asPWORD*)l_sp;

			// Need to move the values back to the context as the called functions
			// may use the debug interface to inspect the registers
			regs.programPointer = l_bc;
			regs.stackPointer = l_sp;
			regs.stackFramePointer = l_fp;

			if( !(objType->flags & asOBJ_NOCOUNT) )
			{
				// Release previous object held by destination pointer
				if( *d != 0 )
					engine->CallObjectMethod(*d, beh->release);
				// Increase ref counter of wanted object
				if( s != 0 )
					engine->CallObjectMethod(s, beh->addref);
			}

			// Set the new object in the destination
			*d = s;
		}
		l_bc += 1+AS_PTR_SIZE;
		break;

	case asBC_JLowZ:
		if( *(asBYTE*)&regs.valueRegister == 0 )
			l_bc += asBC_INTARG(l_bc) + 2;
		else
			l_bc += 2;
		break;

	case asBC_JLowNZ:
		if( *(asBYTE*)&regs.valueRegister != 0 )
			l_bc += asBC_INTARG(l_bc) + 2;
		else
			l_bc += 2;
		break;

	// Don't let the optimizer optimize for size,
	// since it requires extra conditions and jumps
	case 189: l_bc = (asDWORD*)189; break;
	case 190: l_bc = (asDWORD*)190; break;
	case 191: l_bc = (asDWORD*)191; break;
	case 192: l_bc = (asDWORD*)192; break;
	case 193: l_bc = (asDWORD*)193; break;
	case 194: l_bc = (asDWORD*)194; break;
	case 195: l_bc = (asDWORD*)195; break;
	case 196: l_bc = (asDWORD*)196; break;
	case 197: l_bc = (asDWORD*)197; break;
	case 198: l_bc = (asDWORD*)198; break;
	case 199: l_bc = (asDWORD*)199; break;
	case 200: l_bc = (asDWORD*)200; break;
	case 201: l_bc = (asDWORD*)201; break;
	case 202: l_bc = (asDWORD*)202; break;
	case 203: l_bc = (asDWORD*)203; break;
	case 204: l_bc = (asDWORD*)204; break;
	case 205: l_bc = (asDWORD*)205; break;
	case 206: l_bc = (asDWORD*)206; break;
	case 207: l_bc = (asDWORD*)207; break;
	case 208: l_bc = (asDWORD*)208; break;
	case 209: l_bc = (asDWORD*)209; break;
	case 210: l_bc = (asDWORD*)210; break;
	case 211: l_bc = (asDWORD*)211; break;
	case 212: l_bc = (asDWORD*)212; break;
	case 213: l_bc = (asDWORD*)213; break;
	case 214: l_bc = (asDWORD*)214; break;
	case 215: l_bc = (asDWORD*)215; break;
	case 216: l_bc = (asDWORD*)216; break;
	case 217: l_bc = (asDWORD*)217; break;
	case 218: l_bc = (asDWORD*)218; break;
	case 219: l_bc = (asDWORD*)219; break;
	case 220: l_bc = (asDWORD*)220; break;
	case 221: l_bc = (asDWORD*)221; break;
	case 222: l_bc = (asDWORD*)222; break;
	case 223: l_bc = (asDWORD*)223; break;
	case 224: l_bc = (asDWORD*)224; break;
	case 225: l_bc = (asDWORD*)225; break;
	case 226: l_bc = (asDWORD*)226; break;
	case 227: l_bc = (asDWORD*)227; break;
	case 228: l_bc = (asDWORD*)228; break;
	case 229: l_bc = (asDWORD*)229; break;
	case 230: l_bc = (asDWORD*)230; break;
	case 231: l_bc = (asDWORD*)231; break;
	case 232: l_bc = (asDWORD*)232; break;
	case 233: l_bc = (asDWORD*)233; break;
	case 234: l_bc = (asDWORD*)234; break;
	case 235: l_bc = (asDWORD*)235; break;
	case 236: l_bc = (asDWORD*)236; break;
	case 237: l_bc = (asDWORD*)237; break;
	case 238: l_bc = (asDWORD*)238; break;
	case 239: l_bc = (asDWORD*)239; break;
	case 240: l_bc = (asDWORD*)240; break;
	case 241: l_bc = (asDWORD*)241; break;
	case 242: l_bc = (asDWORD*)242; break;
	case 243: l_bc = (asDWORD*)243; break;
	case 244: l_bc = (asDWORD*)244; break;
	case 245: l_bc = (asDWORD*)245; break;
	case 246: l_bc = (asDWORD*)246; break;
	case 247: l_bc = (asDWORD*)247; break;
	case 248: l_bc = (asDWORD*)248; break;
	case 249: l_bc = (asDWORD*)249; break;
	case 250: l_bc = (asDWORD*)250; break;
	case 251: l_bc = (asDWORD*)251; break;
	case 252: l_bc = (asDWORD*)252; break;
	case 253: l_bc = (asDWORD*)253; break;
	case 254: l_bc = (asDWORD*)254; break;
	case 255: l_bc = (asDWORD*)255; break;

#ifdef AS_DEBUG
	default:
		asASSERT(false);
		SetInternalException(TXT_UNRECOGNIZED_BYTE_CODE);
#endif
#if defined(_MSC_VER) && !defined(AS_DEBUG)
	default:
		// This Microsoft specific code allows the
		// compiler to optimize the switch case as
		// it will know that the code will never
		// reach this point
		__assume(0);
#endif
	}

#ifdef AS_DEBUG
		asDWORD instr = *(asBYTE*)old;
		if( instr != asBC_JMP && instr != asBC_JMPP && (instr < asBC_JZ || instr > asBC_JNP) && instr != asBC_JLowZ && instr != asBC_JLowNZ &&
			instr != asBC_CALL && instr != asBC_CALLBND && instr != asBC_CALLINTF && instr != asBC_RET && instr != asBC_ALLOC && instr != asBC_CallPtr && 
			instr != asBC_JitEntry )
		{
			asASSERT( (l_bc - old) == asBCTypeSize[asBCInfo[instr].type] );
		}
#endif
	}
}

int asCContext::SetException(const char *descr)
{
	// Only allow this if we're executing a CALL byte code
	if( callingSystemFunction == 0 ) return asERROR;

	SetInternalException(descr);

	return 0;
}

void asCContext::SetInternalException(const char *descr)
{
	if( inExceptionHandler )
	{
		asASSERT(false); // Shouldn't happen
		return; // but if it does, at least this will not crash the application
	}

	status                = asEXECUTION_EXCEPTION;
	regs.doProcessSuspend = true;

	exceptionString       = descr;
	exceptionFunction     = currentFunction->id;
	exceptionLine         = currentFunction->GetLineNumber(int(regs.programPointer - currentFunction->byteCode.AddressOf()));
	exceptionColumn       = exceptionLine >> 20;
	exceptionLine        &= 0xFFFFF;

	if( exceptionCallback )
		CallExceptionCallback();
}

void asCContext::CleanReturnObject()
{
	if( initialFunction && initialFunction->DoesReturnOnStack() && status == asEXECUTION_FINISHED )
	{
		// If function returns on stack we need to call the destructor on the returned object
		if( initialFunction->returnType.GetObjectType()->beh.destruct )
			engine->CallObjectMethod((void*)(stackBlocks[0] + stackBlockSize - returnValueSize), initialFunction->returnType.GetObjectType()->beh.destruct);

		return;
	}

	if( regs.objectRegister == 0 ) return;

	asASSERT( regs.objectType != 0 );

	if( regs.objectType )
	{
		// Call the destructor on the object
		asSTypeBehaviour *beh = &((asCObjectType*)regs.objectType)->beh;
		if( regs.objectType->GetFlags() & asOBJ_REF )
		{
			asASSERT( beh->release || (regs.objectType->GetFlags() & asOBJ_NOCOUNT) );

			if( beh->release )
				engine->CallObjectMethod(regs.objectRegister, beh->release);

			regs.objectRegister = 0;
		}
		else
		{
			if( beh->destruct )
				engine->CallObjectMethod(regs.objectRegister, beh->destruct);

			// Free the memory
			engine->CallFree(regs.objectRegister);
			regs.objectRegister = 0;
		}
	}
}

void asCContext::CleanStack()
{
	inExceptionHandler = true;

	// Run the clean up code for each of the functions called
	CleanStackFrame();

	while( callStack.GetLength() > 0 )
	{
		PopCallState();

		CleanStackFrame();
	}
	inExceptionHandler = false;
}

// Interface
bool asCContext::IsVarInScope(asUINT varIndex, asUINT stackLevel)
{
	asASSERT( stackLevel < GetCallstackSize() );

	asCScriptFunction *func;
	asUINT pos;

	if( stackLevel == 0 )
	{
		func = currentFunction;
		pos = asUINT(regs.programPointer - func->byteCode.AddressOf());
	}
	else
	{
		asPWORD *s = callStack.AddressOf() + (GetCallstackSize()-stackLevel-1)*CALLSTACK_FRAME_SIZE;
		func = (asCScriptFunction*)s[1];
		pos = asUINT((asDWORD*)s[2] - func->byteCode.AddressOf());
	}

	// First determine if the program position is after the variable declaration
	if( func->variables.GetLength() <= varIndex ) return false;
	if( func->variables[varIndex]->declaredAtProgramPos > pos ) return false;

	asUINT declaredAt = func->variables[varIndex]->declaredAtProgramPos;

	// If the program position is after the variable declaration it is necessary 
	// determine if the program position is still inside the statement block where 
	// the variable was delcared.
	for( int n = 0; n < (int)func->objVariableInfo.GetLength(); n++ )
	{
		if( func->objVariableInfo[n].programPos >= declaredAt )
		{
			// If the current block ends between the declaredAt and current 
			// program position, then we know the variable is no longer visible
			int level = 0;
			for( ; n < (int)func->objVariableInfo.GetLength(); n++ )
			{
				if( func->objVariableInfo[n].programPos > pos )
					break;

				if( func->objVariableInfo[n].option == asBLOCK_BEGIN ) level++;
				if( func->objVariableInfo[n].option == asBLOCK_END && --level < 0 )
					return false;
			}

			break;
		}
	}

	// Variable is visible
	return true;
}

// Internal
void asCContext::DetermineLiveObjects(asCArray<int> &liveObjects, asUINT stackLevel)
{
	asASSERT( stackLevel < GetCallstackSize() );

	asCScriptFunction *func;
	asUINT pos;

	if( stackLevel == 0 )
	{
		func = currentFunction;
		pos = asUINT(regs.programPointer - func->byteCode.AddressOf());
	}
	else
	{
		asPWORD *s = callStack.AddressOf() + (GetCallstackSize()-stackLevel-1)*CALLSTACK_FRAME_SIZE;
		func = (asCScriptFunction*)s[1];
		pos = asUINT((asDWORD*)s[2] - func->byteCode.AddressOf());
	}

	if( status == asEXECUTION_EXCEPTION )
	{
		// Don't consider the last instruction as executed, as it failed with an exception
		// It's not actually necessary to decrease the exact size of the instruction. Just 
		// before the current position is enough to disconsider it.
		pos--;
	}


	// Determine which object variables that are really live ones
	liveObjects.SetLength(func->objVariablePos.GetLength());
	memset(liveObjects.AddressOf(), 0, sizeof(int)*liveObjects.GetLength());
	for( int n = 0; n < (int)func->objVariableInfo.GetLength(); n++ )
	{
		// Find the first variable info with a larger position than the current
		// As the variable info are always placed on the instruction right after the 
		// one that initialized or freed the object, the current position needs to be 
		// considered as valid.
		if( func->objVariableInfo[n].programPos > pos )
		{
			// We've determined how far the execution ran, now determine which variables are alive
			for( --n; n >= 0; n-- )
			{
				switch( func->objVariableInfo[n].option )
				{
				case asOBJ_UNINIT: // Object was destroyed
					{
						// TODO: optimize: This should have been done by the compiler already
						// Which variable is this?
						asUINT var = 0;
						for( asUINT v = 0; v < func->objVariablePos.GetLength(); v++ )
							if( func->objVariablePos[v] == func->objVariableInfo[n].variableOffset )
							{
								var = v;
								break;
							}
						liveObjects[var] -= 1;
					}
					break;
				case asOBJ_INIT: // Object was created
					{
						// Which variable is this?
						asUINT var = 0;
						for( asUINT v = 0; v < func->objVariablePos.GetLength(); v++ )
							if( func->objVariablePos[v] == func->objVariableInfo[n].variableOffset )
							{
								var = v;
								break;
							}
						liveObjects[var] += 1;
					}
					break;
				case asBLOCK_BEGIN: // Start block
					// We should ignore start blocks, since it just means the  
					// program was within the block when the exception ocurred
					break;
				case asBLOCK_END: // End block
					// We need to skip the entire block, as the objects created
					// and destroyed inside this block are already out of scope
					{
						int nested = 1;
						while( nested > 0 )
						{
							int option = func->objVariableInfo[--n].option;
							if( option == 3 )
								nested++;
							if( option == 2 )
								nested--;
						}
					}
					break;
				}
			}

			// We're done with the investigation
			break;
		}
	}
}

void asCContext::CleanStackFrame()
{
	// Clean object variables
	if( !isStackMemoryNotAllocated )
	{
		// Determine which object variables that are really live ones
		asCArray<int> liveObjects;
		DetermineLiveObjects(liveObjects, 0);

		for( asUINT n = 0; n < currentFunction->objVariablePos.GetLength(); n++ )
		{
			int pos = currentFunction->objVariablePos[n];
			if( n < currentFunction->objVariablesOnHeap )
			{
				// Check if the pointer is initialized
				if( *(asPWORD*)&regs.stackFramePointer[-pos] )
				{
					// Call the object's destructor
					asSTypeBehaviour *beh = &currentFunction->objVariableTypes[n]->beh;
					if( currentFunction->objVariableTypes[n]->flags & asOBJ_REF )
					{
						asASSERT( (currentFunction->objVariableTypes[n]->flags & asOBJ_NOCOUNT) || beh->release );
						if( beh->release )
							engine->CallObjectMethod((void*)*(asPWORD*)&regs.stackFramePointer[-pos], beh->release);
						*(asPWORD*)&regs.stackFramePointer[-pos] = 0;
					}
					else
					{
						if( beh->destruct )
							engine->CallObjectMethod((void*)*(asPWORD*)&regs.stackFramePointer[-pos], beh->destruct);

						// Free the memory
						engine->CallFree((void*)*(asPWORD*)&regs.stackFramePointer[-pos]);
						*(asPWORD*)&regs.stackFramePointer[-pos] = 0;
					}
				}
			}
			else
			{
				asASSERT( currentFunction->objVariableTypes[n]->GetFlags() & asOBJ_VALUE );

				// Only destroy the object if it is truly alive
				if( liveObjects[n] > 0 )
				{
					asSTypeBehaviour *beh = &currentFunction->objVariableTypes[n]->beh;
					if( beh->destruct )
						engine->CallObjectMethod((void*)(asPWORD*)&regs.stackFramePointer[-pos], beh->destruct);
				}
			}
		}

		// If the object is a script declared object, then we must release it
		// as the compiler adds a reference at the entry of the function. Make sure
		// the function has actually been entered
		if( currentFunction->objectType && regs.programPointer != currentFunction->byteCode.AddressOf() )
		{
			// Methods returning a reference or constructors don't add a reference
			if( !currentFunction->returnType.IsReference() && currentFunction->name != currentFunction->objectType->name )
			{
				asSTypeBehaviour *beh = &currentFunction->objectType->beh;
				if( beh->release && *(asPWORD*)&regs.stackFramePointer[0] != 0 )
				{
					engine->CallObjectMethod((void*)*(asPWORD*)&regs.stackFramePointer[0], beh->release);
					*(asPWORD*)&regs.stackFramePointer[0] = 0;
				}
			}
		}
	}
	else
		isStackMemoryNotAllocated = false;

	// Functions that do not own the object and parameters shouldn't do any clean up
	if( currentFunction->dontCleanUpOnException )
		return;

	// Clean object and parameters
	int offset = 0;
	if( currentFunction->objectType )
	{
		offset += AS_PTR_SIZE;
	}
	for( asUINT n = 0; n < currentFunction->parameterTypes.GetLength(); n++ )
	{
		if( currentFunction->parameterTypes[n].IsObject() && !currentFunction->parameterTypes[n].IsReference() )
		{
			if( *(asPWORD*)&regs.stackFramePointer[offset] )
			{
				// Call the object's destructor
				asSTypeBehaviour *beh = currentFunction->parameterTypes[n].GetBehaviour();
				if( currentFunction->parameterTypes[n].GetObjectType()->flags & asOBJ_REF )
				{
					asASSERT( (currentFunction->parameterTypes[n].GetObjectType()->flags & asOBJ_NOCOUNT) || beh->release );

					if( beh->release )
						engine->CallObjectMethod((void*)*(asPWORD*)&regs.stackFramePointer[offset], beh->release);
					*(asPWORD*)&regs.stackFramePointer[offset] = 0;
				}
				else
				{
					if( beh->destruct )
						engine->CallObjectMethod((void*)*(asPWORD*)&regs.stackFramePointer[offset], beh->destruct);

					// Free the memory
					engine->CallFree((void*)*(asPWORD*)&regs.stackFramePointer[offset]);
					*(asPWORD*)&regs.stackFramePointer[offset] = 0;
				}
			}
		}

		offset += currentFunction->parameterTypes[n].GetSizeOnStackDWords();
	}
}

// interface
int asCContext::GetExceptionLineNumber(int *column, const char **sectionName)
{
	if( GetState() != asEXECUTION_EXCEPTION ) return asERROR;

	if( column ) *column = exceptionColumn;

	if( sectionName ) *sectionName = engine->scriptFunctions[exceptionFunction]->GetScriptSectionName();

	return exceptionLine;
}

// interface
asIScriptFunction *asCContext::GetExceptionFunction()
{
	if( GetState() != asEXECUTION_EXCEPTION ) return 0;

	return engine->scriptFunctions[exceptionFunction];
}

// interface
const char *asCContext::GetExceptionString()
{
	if( GetState() != asEXECUTION_EXCEPTION ) return 0;

	return exceptionString.AddressOf();
}

// interface
asEContextState asCContext::GetState() const
{
	return status;
}

// interface
int asCContext::SetLineCallback(asSFuncPtr callback, void *obj, int callConv)
{
	lineCallback = true;
	regs.doProcessSuspend = true;
	lineCallbackObj = obj;
	bool isObj = false;
	if( (unsigned)callConv == asCALL_GENERIC )
	{
		lineCallback = false;
		regs.doProcessSuspend = doSuspend;
		return asNOT_SUPPORTED;
	}
	if( (unsigned)callConv >= asCALL_THISCALL )
	{
		isObj = true;
		if( obj == 0 )
		{
			lineCallback = false;
			regs.doProcessSuspend = doSuspend;
			return asINVALID_ARG;
		}
	}

	int r = DetectCallingConvention(isObj, callback, callConv, &lineCallbackFunc);
	if( r < 0 ) lineCallback = false;

	regs.doProcessSuspend = doSuspend || lineCallback;

	return r;
}

void asCContext::CallLineCallback()
{
	if( lineCallbackFunc.callConv < ICC_THISCALL )
		engine->CallGlobalFunction(this, lineCallbackObj, &lineCallbackFunc, 0);
	else
		engine->CallObjectMethod(lineCallbackObj, this, &lineCallbackFunc, 0);
}

// interface
int asCContext::SetExceptionCallback(asSFuncPtr callback, void *obj, int callConv)
{
	exceptionCallback = true;
	exceptionCallbackObj = obj;
	bool isObj = false;
	if( (unsigned)callConv == asCALL_GENERIC )
		return asNOT_SUPPORTED;
	if( (unsigned)callConv >= asCALL_THISCALL )
	{
		isObj = true;
		if( obj == 0 )
		{
			exceptionCallback = false;
			return asINVALID_ARG;
		}
	}
	int r = DetectCallingConvention(isObj, callback, callConv, &exceptionCallbackFunc);
	if( r < 0 ) exceptionCallback = false;
	return r;
}

void asCContext::CallExceptionCallback()
{
	if( exceptionCallbackFunc.callConv < ICC_THISCALL )
		engine->CallGlobalFunction(this, exceptionCallbackObj, &exceptionCallbackFunc, 0);
	else
		engine->CallObjectMethod(exceptionCallbackObj, this, &exceptionCallbackFunc, 0);
}

// interface
void asCContext::ClearLineCallback()
{
	lineCallback = false;
	regs.doProcessSuspend = doSuspend;
}

// interface
void asCContext::ClearExceptionCallback()
{
	exceptionCallback = false;
}

int asCContext::CallGeneric(int id, void *objectPointer)
{
	asCScriptFunction *sysFunction = engine->scriptFunctions[id];
	asSSystemFunctionInterface *sysFunc = sysFunction->sysFuncIntf;
	void (*func)(asIScriptGeneric*) = (void (*)(asIScriptGeneric*))sysFunc->func;
	int popSize = sysFunc->paramSize;
	asDWORD *args = regs.stackPointer;

	// Verify the object pointer if it is a class method
	void *currentObject = 0;
	if( sysFunc->callConv == ICC_GENERIC_METHOD )
	{
		if( objectPointer )
		{
			currentObject = objectPointer;

			// Don't increase the reference of this pointer
			// since it will not have been constructed yet
		}
		else
		{
			// The object pointer should be popped from the context stack
			popSize += AS_PTR_SIZE;

			// Check for null pointer
			currentObject = (void*)*(asPWORD*)(args);
			if( currentObject == 0 )
			{
				SetInternalException(TXT_NULL_POINTER_ACCESS);
				return 0;
			}

			// Add the base offset for multiple inheritance
			currentObject = (void*)(asPWORD(currentObject) + sysFunc->baseOffset);

			// Skip object pointer
			args += AS_PTR_SIZE;
		}
	}

	if( sysFunction->DoesReturnOnStack() )
	{
		// Skip the address where the return value will be stored
		args += AS_PTR_SIZE;
		popSize += AS_PTR_SIZE;
	}

	asCGeneric gen(engine, sysFunction, currentObject, args);

	callingSystemFunction = sysFunction;
	func(&gen);
	callingSystemFunction = 0;

	regs.valueRegister = gen.returnVal;
	regs.objectRegister = gen.objectRegister;
	regs.objectType = sysFunction->returnType.GetObjectType();

	// Clean up function parameters
	int offset = 0;
	for( asUINT n = 0; n < sysFunction->parameterTypes.GetLength(); n++ )
	{
		if( sysFunction->parameterTypes[n].IsObject() && !sysFunction->parameterTypes[n].IsReference() )
		{
			void *obj = *(void**)&args[offset];
			if( obj )
			{
				// Release the object
				asSTypeBehaviour *beh = &sysFunction->parameterTypes[n].GetObjectType()->beh;
				if( sysFunction->parameterTypes[n].GetObjectType()->flags & asOBJ_REF )
				{
					asASSERT( (sysFunction->parameterTypes[n].GetObjectType()->flags & asOBJ_NOCOUNT) || beh->release );
					if( beh->release )
						engine->CallObjectMethod(obj, beh->release);
				}
				else
				{
					// Call the destructor then free the memory
					if( beh->destruct )
						engine->CallObjectMethod(obj, beh->destruct);

					engine->CallFree(obj);
				}
			}
		}
		offset += sysFunction->parameterTypes[n].GetSizeOnStackDWords();
	}

	// Return how much should be popped from the stack
	return popSize;
}

// interface
int asCContext::GetVarCount(asUINT stackLevel)
{
	asIScriptFunction *func = GetFunction(stackLevel);
	if( func == 0 ) return asINVALID_ARG;

	return func->GetVarCount();
}

// interface
const char *asCContext::GetVarName(asUINT varIndex, asUINT stackLevel)
{
	asIScriptFunction *func = GetFunction(stackLevel);
	if( func == 0 ) return 0;

	const char *name = 0;
	int r = func->GetVar(varIndex, &name);
	return r >= 0 ? name : 0;
}

// interface
const char *asCContext::GetVarDeclaration(asUINT varIndex, asUINT stackLevel)
{
	asIScriptFunction *func = GetFunction(stackLevel);
	if( func == 0 ) return 0;

	return func->GetVarDecl(varIndex);
}

// interface
int asCContext::GetVarTypeId(asUINT varIndex, asUINT stackLevel)
{
	asIScriptFunction *func = GetFunction(stackLevel);
	if( func == 0 ) return asINVALID_ARG;

	int typeId;
	int r = func->GetVar(varIndex, 0, &typeId);
	return r < 0 ? r : typeId;
}

// interface
void *asCContext::GetAddressOfVar(asUINT varIndex, asUINT stackLevel)
{
	if( stackLevel >= GetCallstackSize() ) return 0;

	asCScriptFunction *func;
	asDWORD *sf;
	if( stackLevel == 0 )
	{
		func = currentFunction;
		sf = regs.stackFramePointer;
	}
	else
	{
		asPWORD *s = callStack.AddressOf() + (GetCallstackSize()-stackLevel-1)*CALLSTACK_FRAME_SIZE;
		func = (asCScriptFunction*)s[1];
		sf = (asDWORD*)s[0];
	}

	if( func == 0 )
		return 0;

	if( varIndex >= func->variables.GetLength() )
		return 0;

	// For object variables it's necessary to dereference the pointer to get the address of the value
	if( func->variables[varIndex]->type.IsObject() && !func->variables[varIndex]->type.IsObjectHandle() )
	{
		// Determine if the object is really on the heap
		bool onHeap = true;
		if( func->variables[varIndex]->type.GetObjectType()->GetFlags() & asOBJ_VALUE )
		{
			int pos = func->variables[varIndex]->stackOffset;
			for( asUINT n = 0; n < func->objVariablePos.GetLength(); n++ )
			{
				if( func->objVariablePos[n] == pos )
				{
					onHeap = n < func->objVariablesOnHeap;

					if( !onHeap )
					{
						// If the object on the stack is not initialized return a null pointer instead
						asCArray<int> liveObjects;
						DetermineLiveObjects(liveObjects, stackLevel);

						if( liveObjects[n] <= 0 )
							return 0;
					}

					break;
				}
			}
		}

		if( onHeap )
			return *(void**)(sf - func->variables[varIndex]->stackOffset);
	}

	return sf - func->variables[varIndex]->stackOffset;
}

// interface
// returns the typeId of the 'this' object at the given call stack level (-1 for current)
// returns 0 if the function call at the given stack level is not a method
int asCContext::GetThisTypeId(asUINT stackLevel)
{
	asIScriptFunction *func = GetFunction(stackLevel);
	if( func == 0 ) return asINVALID_ARG;

	if( func->GetObjectType() == 0 )
		return 0; // not in a method

	// create a datatype
	asCDataType dt = asCDataType::CreateObject((asCObjectType*)func->GetObjectType(), false);

	// return a typeId from the data type
	return engine->GetTypeIdFromDataType(dt);
}

// interface
// returns the 'this' object pointer at the given call stack level (-1 for current)
// returns 0 if the function call at the given stack level is not a method
void *asCContext::GetThisPointer(asUINT stackLevel)
{
	if( stackLevel >= GetCallstackSize() )
		return 0;

	asCScriptFunction *func;
	asDWORD *sf;
	if( stackLevel == 0 )
	{
		func = currentFunction;
		sf = regs.stackFramePointer;
	}
	else
	{
		asPWORD *s = callStack.AddressOf() + (GetCallstackSize()-stackLevel-1)*CALLSTACK_FRAME_SIZE;
		func = (asCScriptFunction*)s[1];
		sf = (asDWORD*)s[0];
	}

	if( func == 0 )
		return 0;

	if( func->objectType == 0 )
		return 0; // not in a method

	void *thisPointer = (void*)*(asPWORD*)(sf);
	if( thisPointer == 0 )
	{
		return 0;
	}

	// NOTE: this returns the pointer to the 'this' while the GetVarPointer functions return
	// a pointer to a pointer. I can't imagine someone would want to change the 'this'
	return thisPointer;
}

END_AS_NAMESPACE