/**

 * vim: set ts=4 :

 * ================================================================

 * SourcePawn (C)2004-2007 AlliedModders LLC.  All rights reserved.

 * ================================================================

 *

 * This file is not open source and may not be copied without explicit

 * written permission of AlliedModders LLC.  This file may not be redistributed 

 * in whole or significant part.

 * For information, see LICENSE.txt or http://www.sourcemod.net/license.php

 *

 * Version: $Id$

 */

#ifndef _INCLUDE_SOURCEPAWN_JIT_X86_H_

#define _INCLUDE_SOURCEPAWN_JIT_X86_H_

#include <sp_vm_types.h>

#include <sp_vm_api.h>

#include <jit_helpers.h>

using namespace SourcePawn;

#define JIT_INLINE_ERRORCHECKS		(1<<0)

#define JIT_INLINE_NATIVES			(1<<1)

#define STACK_MARGIN				64			//8 parameters of safety, I guess

#define JIT_FUNCMAGIC				0x214D4148	//magic function offset

#define JITVARS_TRACKER				0		//important: don't change this to avoid trouble

#define JITVARS_FUNCINFO			1		//important: don't change this aWOAWOGJQG I LIKE HAM

#define JITVARS_REBASE				2		//important: hi, i'm bail

typedef struct tracker_s

{

	size_t size; 

	ucell_t *pBase; 

	ucell_t *pCur;

} tracker_t;

typedef struct funcinfo_s

{

	unsigned int magic;

	unsigned int index;

} funcinfo_t;

typedef struct functracker_s

{

	unsigned int num_functions;

	unsigned int code_size;

} functracker_t;

struct floattbl_t

{

	floattbl_t()

	{

		found = false;

		index = 0;

	}

	bool found;

	unsigned int index;

};

class CompData : public ICompilation

{

public:

	CompData() : plugin(NULL), 

		debug(false), inline_level(0), rebase(NULL),

		error_set(SP_ERROR_NONE), func_idx(0)

	{

	};

public:

	sp_plugin_t *plugin;			/* plugin handle */

	bool debug;						/* whether to compile debug mode */

	int inline_level;				/* inline optimization level */

	jitcode_t rebase;				/* relocation map */

	int error_set;					/* error code to halt process */

	unsigned int func_idx;			/* current function index */

	jitoffs_t jit_return;			/* point in main call to return to */

	jitoffs_t jit_verify_addr_eax;

	jitoffs_t jit_verify_addr_edx;

	jitoffs_t jit_break;			/* call to op.break */

	jitoffs_t jit_sysreq_n;			/* call version of op.sysreq.n */

	jitoffs_t jit_genarray;			/* call to genarray intrinsic */

	jitoffs_t jit_error_bounds;

	jitoffs_t jit_error_divzero;

	jitoffs_t jit_error_stacklow;

	jitoffs_t jit_error_stackmin;

	jitoffs_t jit_error_memaccess;

	jitoffs_t jit_error_heaplow;

	jitoffs_t jit_error_heapmin;

	jitoffs_t jit_error_array_too_big;

	jitoffs_t jit_extern_error;		/* returning generic error */

	jitoffs_t jit_sysreq_c;			/* old version! */

	jitoffs_t jit_rounding_table;

	floattbl_t *jit_float_table;

	uint32_t codesize;				/* total codesize */

};

class JITX86 : public IVirtualMachine

{

public:

	const char *GetVMName();

	ICompilation *StartCompilation(sp_plugin_t *plugin);

	bool SetCompilationOption(ICompilation *co, const char *key, const char *val);

	sp_context_t *CompileToContext(ICompilation *co, int *err);

	void AbortCompilation(ICompilation *co);

	void FreeContext(sp_context_t *ctx);

	int ContextExecute(sp_context_t *ctx, uint32_t code_idx, cell_t *result);

	unsigned int GetAPIVersion();

	bool FunctionLookup(const sp_context_t *ctx, uint32_t code_addr, unsigned int *result);

	bool FunctionPLookup(const sp_context_t *ctx, uint32_t code_addr, unsigned int *result);

	unsigned int FunctionCount(const sp_context_t *ctx);

	const char *GetVersionString();

	const char *GetCPUOptimizations();

	SPVM_NATIVE_FUNC CreateFakeNative(SPVM_FAKENATIVE_FUNC callback, void *pData);

	void DestroyFakeNative(SPVM_NATIVE_FUNC func);

};

cell_t NativeCallback(sp_context_t *ctx, ucell_t native_idx, cell_t *params);

cell_t NativeCallback_Debug(sp_context_t *ctx, ucell_t native_idx, cell_t *params);

jitoffs_t RelocLookup(JitWriter *jit, cell_t pcode_offs, bool relative=false);

#define AMX_REG_PRI		REG_EAX

#define AMX_REG_ALT		REG_EDX

#define AMX_REG_STK		REG_EDI

#define AMX_REG_DAT		REG_EBP

#define AMX_REG_TMP		REG_ECX

#define AMX_REG_INFO	REG_ESI

#define AMX_REG_FRM		REG_EBX

#define AMX_INFO_FRM		AMX_REG_INFO	//not relocated

#define AMX_INFO_FRAME		0				//(same thing as above) 

#define AMX_INFO_HEAP		4				//not relocated

#define AMX_INFO_RETVAL		8				//physical

#define AMX_INFO_CONTEXT	12				//physical

#define AMX_INFO_STACKTOP	16				//relocated

extern ISourcePawnEngine *engine;

#endif //_INCLUDE_SOURCEPAWN_JIT_X86_H_