/**

 * $Id: sh4x86.c,v 1.5 2007-09-11 21:23:48 nkeynes Exp $

 * 

 * SH4 => x86 translation. This version does no real optimization, it just

 * outputs straight-line x86 code - it mainly exists to provide a baseline

 * to test the optimizing versions against.

 *

 * Copyright (c) 2007 Nathan Keynes.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */

#include <assert.h>

#include "sh4/sh4core.h"

#include "sh4/sh4trans.h"

#include "sh4/x86op.h"

#include "clock.h"

#define DEFAULT_BACKPATCH_SIZE 4096

/** 

 * Struct to manage internal translation state. This state is not saved -

 * it is only valid between calls to sh4_translate_begin_block() and

 * sh4_translate_end_block()

 */

struct sh4_x86_state {

    gboolean in_delay_slot;

    gboolean priv_checked; /* true if we've already checked the cpu mode. */

    gboolean fpuen_checked; /* true if we've already checked fpu enabled. */

    /* Allocated memory for the (block-wide) back-patch list */

    uint32_t **backpatch_list;

    uint32_t backpatch_posn;

    uint32_t backpatch_size;

};

#define EXIT_DATA_ADDR_READ 0

#define EXIT_DATA_ADDR_WRITE 7

#define EXIT_ILLEGAL 14

#define EXIT_SLOT_ILLEGAL 21

#define EXIT_FPU_DISABLED 28

#define EXIT_SLOT_FPU_DISABLED 35

static struct sh4_x86_state sh4_x86;

void sh4_x86_init()

{

    sh4_x86.backpatch_list = malloc(DEFAULT_BACKPATCH_SIZE);

    sh4_x86.backpatch_size = DEFAULT_BACKPATCH_SIZE / sizeof(uint32_t *);

}

static void sh4_x86_add_backpatch( uint8_t *ptr )

{

    if( sh4_x86.backpatch_posn == sh4_x86.backpatch_size ) {

	sh4_x86.backpatch_size <<= 1;

	sh4_x86.backpatch_list = realloc( sh4_x86.backpatch_list, sh4_x86.backpatch_size * sizeof(uint32_t *) );

	assert( sh4_x86.backpatch_list != NULL );

    }

    sh4_x86.backpatch_list[sh4_x86.backpatch_posn++] = (uint32_t *)ptr;

}

static void sh4_x86_do_backpatch( uint8_t *reloc_base )

{

    unsigned int i;

    for( i=0; i<sh4_x86.backpatch_posn; i++ ) {

	*sh4_x86.backpatch_list[i] += (reloc_base - ((uint8_t *)sh4_x86.backpatch_list[i]) - 4);

    }

}

#ifndef NDEBUG

#define MARK_JMP(x,n) uint8_t *_mark_jmp_##x = xlat_output + n

#define CHECK_JMP(x) assert( _mark_jmp_##x == xlat_output )

#else

#define MARK_JMP(x,n)

#define CHECK_JMP(x)

#endif

/**

 * Emit an instruction to load an SH4 reg into a real register

 */

static inline void load_reg( int x86reg, int sh4reg ) 

{

    /* mov [bp+n], reg */

    OP(0x8B);

    OP(0x45 + (x86reg<<3));

    OP(REG_OFFSET(r[sh4reg]));

}

static inline void load_reg16s( int x86reg, int sh4reg )

{

    OP(0x0F);

    OP(0xBF);

    MODRM_r32_sh4r(x86reg, REG_OFFSET(r[sh4reg]));

}

static inline void load_reg16u( int x86reg, int sh4reg )

{

    OP(0x0F);

    OP(0xB7);

    MODRM_r32_sh4r(x86reg, REG_OFFSET(r[sh4reg]));

}

static inline void load_spreg( int x86reg, int regoffset )

{

    /* mov [bp+n], reg */

    OP(0x8B);

    OP(0x45 + (x86reg<<3));

    OP(regoffset);

}

/**

 * Emit an instruction to load an immediate value into a register

 */

static inline void load_imm32( int x86reg, uint32_t value ) {

    /* mov #value, reg */

    OP(0xB8 + x86reg);

    OP32(value);

}

/**

 * Emit an instruction to store an SH4 reg (RN)

 */

void static inline store_reg( int x86reg, int sh4reg ) {

    /* mov reg, [bp+n] */

    OP(0x89);

    OP(0x45 + (x86reg<<3));

    OP(REG_OFFSET(r[sh4reg]));

}

void static inline store_spreg( int x86reg, int regoffset ) {

    /* mov reg, [bp+n] */

    OP(0x89);

    OP(0x45 + (x86reg<<3));

    OP(regoffset);

}

#define load_fr_bank(bankreg) load_spreg( bankreg, REG_OFFSET(fr_bank))

/**

 * Load an FR register (single-precision floating point) into an integer x86

 * register (eg for register-to-register moves)

 */

void static inline load_fr( int bankreg, int x86reg, int frm )

{

    OP(0x8B); OP(0x40+bankreg+(x86reg<<3)); OP((frm^1)<<2);

}

/**

 * Store an FR register (single-precision floating point) into an integer x86

 * register (eg for register-to-register moves)

 */

void static inline store_fr( int bankreg, int x86reg, int frn )

{

    OP(0x89);  OP(0x40+bankreg+(x86reg<<3)); OP((frn^1)<<2);

}

/**

 * Load a pointer to the back fp back into the specified x86 register. The

 * bankreg must have been previously loaded with FPSCR.

 * NB: 10 bytes

 */

static inline void load_xf_bank( int bankreg )

{

    SHR_imm8_r32( (21 - 6), bankreg ); // Extract bit 21 then *64 for bank size

    AND_imm8s_r32( 0x40, bankreg );    // Complete extraction

    OP(0x8D); OP(0x44+(bankreg<<3)); OP(0x28+bankreg); OP(REG_OFFSET(fr)); // LEA [ebp+bankreg+disp], bankreg

}

/**

 * Push a 32-bit float onto the FPU stack, with bankreg previously loaded

 * with the location of the current fp bank.

 */

static inline void push_fr( int bankreg, int frm ) 

{

    OP(0xD9); OP(0x40 + bankreg); OP((frm^1)<<2);  // FLD.S [bankreg + frm^1*4]

}

/**

 * Pop a 32-bit float from the FPU stack and store it back into the fp bank, 

 * with bankreg previously loaded with the location of the current fp bank.

 */

static inline void pop_fr( int bankreg, int frm )

{

    OP(0xD9); OP(0x58 + bankreg); OP((frm^1)<<2); // FST.S [bankreg + frm^1*4]

}

/**

 * Push a 64-bit double onto the FPU stack, with bankreg previously loaded

 * with the location of the current fp bank.

 */

static inline void push_dr( int bankreg, int frm )

{

    if( frm&1 ) { 

	// this is technically undefined, but it seems to work consistently - high 32 bits

	// loaded from FRm (32-bits), low 32bits are 0.

	OP(0xFF); OP(0x70 + bankreg); OP((frm^1)<<2); // PUSH [bankreg + frm^1]

	PUSH_imm32(0);

    } else {

	OP(0xDD); OP(0x40 + bankreg); OP(frm<<2); // FLD.D [bankreg + frm*4]

    }

}

static inline void pop_dr( int bankreg, int frm )

{

    if( frm&1 ) {

    } else {

	OP(0xDD); OP(0x58 + bankreg); OP(frm<<2); // FST.D [bankreg + frm*4]

    }

}

/**

 * Note: clobbers EAX to make the indirect call - this isn't usually

 * a problem since the callee will usually clobber it anyway.

 */

static inline void call_func0( void *ptr )

{

    load_imm32(R_EAX, (uint32_t)ptr);

    CALL_r32(R_EAX);

}

static inline void call_func1( void *ptr, int arg1 )

{

    PUSH_r32(arg1);

    call_func0(ptr);

    ADD_imm8s_r32( -4, R_ESP );

}

static inline void call_func2( void *ptr, int arg1, int arg2 )

{

    PUSH_r32(arg2);

    PUSH_r32(arg1);

    call_func0(ptr);

    ADD_imm8s_r32( -8, R_ESP );

}

/**

 * Write a double (64-bit) value into memory, with the first word in arg2a, and

 * the second in arg2b

 * NB: 30 bytes

 */

static inline void MEM_WRITE_DOUBLE( int addr, int arg2a, int arg2b )

{

    ADD_imm8s_r32( 4, addr );

    PUSH_r32(addr);

    PUSH_r32(arg2b);

    ADD_imm8s_r32( -4, addr );

    PUSH_r32(addr);

    PUSH_r32(arg2a);

    call_func0(sh4_write_long);

    ADD_imm8s_r32( -8, R_ESP );

    call_func0(sh4_write_long);

    ADD_imm8s_r32( -8, R_ESP );

}

/**

 * Read a double (64-bit) value from memory, writing the first word into arg2a

 * and the second into arg2b. The addr must not be in EAX

 * NB: 27 bytes

 */

static inline void MEM_READ_DOUBLE( int addr, int arg2a, int arg2b )

{

    PUSH_r32(addr);

    call_func0(sh4_read_long);

    POP_r32(addr);

    PUSH_r32(R_EAX);

    ADD_imm8s_r32( 4, addr );

    PUSH_r32(addr);

    call_func0(sh4_read_long);

    ADD_imm8s_r32( -4, R_ESP );

    MOV_r32_r32( R_EAX, arg2b );

    POP_r32(arg2a);

}

/* Exception checks - Note that all exception checks will clobber EAX */

static void check_priv( )

{

    if( !sh4_x86.priv_checked ) {

	sh4_x86.priv_checked = TRUE;

	load_spreg( R_EAX, R_SR );

	AND_imm32_r32( SR_MD, R_EAX );

	if( sh4_x86.in_delay_slot ) {

	    JE_exit( EXIT_SLOT_ILLEGAL );

	} else {

	    JE_exit( EXIT_ILLEGAL );

	}

    }

}

static void check_fpuen( )

{

    if( !sh4_x86.fpuen_checked ) {

	sh4_x86.fpuen_checked = TRUE;

	load_spreg( R_EAX, R_SR );

	AND_imm32_r32( SR_FD, R_EAX );

	if( sh4_x86.in_delay_slot ) {

	    JNE_exit(EXIT_SLOT_FPU_DISABLED);

	} else {

	    JNE_exit(EXIT_FPU_DISABLED);

	}

    }

}

static void check_ralign16( int x86reg )

{

    TEST_imm32_r32( 0x00000001, x86reg );

    JNE_exit(EXIT_DATA_ADDR_READ);

}

static void check_walign16( int x86reg )

{

    TEST_imm32_r32( 0x00000001, x86reg );

    JNE_exit(EXIT_DATA_ADDR_WRITE);

}

static void check_ralign32( int x86reg )

{

    TEST_imm32_r32( 0x00000003, x86reg );

    JNE_exit(EXIT_DATA_ADDR_READ);

}

static void check_walign32( int x86reg )

{

    TEST_imm32_r32( 0x00000003, x86reg );

    JNE_exit(EXIT_DATA_ADDR_WRITE);

}

#define UNDEF()

#define MEM_RESULT(value_reg) if(value_reg != R_EAX) { MOV_r32_r32(R_EAX,value_reg); }

#define MEM_READ_BYTE( addr_reg, value_reg ) call_func1(sh4_read_byte, addr_reg ); MEM_RESULT(value_reg)

#define MEM_READ_WORD( addr_reg, value_reg ) call_func1(sh4_read_word, addr_reg ); MEM_RESULT(value_reg)

#define MEM_READ_LONG( addr_reg, value_reg ) call_func1(sh4_read_long, addr_reg ); MEM_RESULT(value_reg)

#define MEM_WRITE_BYTE( addr_reg, value_reg ) call_func2(sh4_write_byte, addr_reg, value_reg)

#define MEM_WRITE_WORD( addr_reg, value_reg ) call_func2(sh4_write_word, addr_reg, value_reg)

#define MEM_WRITE_LONG( addr_reg, value_reg ) call_func2(sh4_write_long, addr_reg, value_reg)

#define RAISE_EXCEPTION( exc ) call_func1(sh4_raise_exception, exc);

#define SLOTILLEGAL() RAISE_EXCEPTION(EXC_SLOT_ILLEGAL); return 1

/**

 * Emit the 'start of block' assembly. Sets up the stack frame and save

 * SI/DI as required

 */

void sh4_translate_begin_block() 

{

    PUSH_r32(R_EBP);

    /* mov &sh4r, ebp */

    load_imm32( R_EBP, (uint32_t)&sh4r );

    PUSH_r32(R_EDI);

    PUSH_r32(R_ESI);

    sh4_x86.in_delay_slot = FALSE;

    sh4_x86.priv_checked = FALSE;

    sh4_x86.fpuen_checked = FALSE;

    sh4_x86.backpatch_posn = 0;

}

/**

 * Exit the block early (ie branch out), conditionally or otherwise

 */

void exit_block( )

{

    store_spreg( R_EDI, REG_OFFSET(pc) );

    MOV_moff32_EAX( (uint32_t)&sh4_cpu_period );

    load_spreg( R_ECX, REG_OFFSET(slice_cycle) );

    MUL_r32( R_ESI );

    ADD_r32_r32( R_EAX, R_ECX );

    store_spreg( R_ECX, REG_OFFSET(slice_cycle) );

    XOR_r32_r32( R_EAX, R_EAX );

    POP_r32(R_ESI);

    POP_r32(R_EDI);

    POP_r32(R_EBP);

    RET();

}

/**

 * Flush any open regs back to memory, restore SI/DI/, update PC, etc

 */

void sh4_translate_end_block( sh4addr_t pc ) {

    assert( !sh4_x86.in_delay_slot ); // should never stop here

    // Normal termination - save PC, cycle count

    exit_block( );

    uint8_t *end_ptr = xlat_output;

    // Exception termination. Jump block for various exception codes:

    PUSH_imm32( EXC_DATA_ADDR_READ );

    JMP_rel8( 33 );

    PUSH_imm32( EXC_DATA_ADDR_WRITE );

    JMP_rel8( 26 );

    PUSH_imm32( EXC_ILLEGAL );

    JMP_rel8( 19 );

    PUSH_imm32( EXC_SLOT_ILLEGAL ); 

    JMP_rel8( 12 );

    PUSH_imm32( EXC_FPU_DISABLED ); 

    JMP_rel8( 5 );                 

    PUSH_imm32( EXC_SLOT_FPU_DISABLED );

    // target

    load_spreg( R_ECX, REG_OFFSET(pc) );

    ADD_r32_r32( R_ESI, R_ECX );

    ADD_r32_r32( R_ESI, R_ECX );

    store_spreg( R_ECX, REG_OFFSET(pc) );

    MOV_moff32_EAX( (uint32_t)&sh4_cpu_period );

    load_spreg( R_ECX, REG_OFFSET(slice_cycle) );

    MUL_r32( R_ESI );

    ADD_r32_r32( R_EAX, R_ECX );

    store_spreg( R_ECX, REG_OFFSET(slice_cycle) );

    load_imm32( R_EAX, (uint32_t)sh4_raise_exception ); // 6

    CALL_r32( R_EAX ); // 2

    POP_r32(R_EBP);

    RET();

    sh4_x86_do_backpatch( end_ptr );

}

/**

 * Translate a single instruction. Delayed branches are handled specially

 * by translating both branch and delayed instruction as a single unit (as

 * 

 *

 * @return true if the instruction marks the end of a basic block

 * (eg a branch or 

 */

uint32_t sh4_x86_translate_instruction( uint32_t pc )

{

    uint16_t ir = sh4_read_word( pc );

        switch( (ir&0xF000) >> 12 ) {

            case 0x0:

                switch( ir&0xF ) {

                    case 0x2:

                        switch( (ir&0x80) >> 7 ) {

                            case 0x0:

                                switch( (ir&0x70) >> 4 ) {

                                    case 0x0:

                                        { /* STC SR, Rn */

                                        uint32_t Rn = ((ir>>8)&0xF); 

                                        call_func0(sh4_read_sr);

                                        store_reg( R_EAX, Rn );

                                        }

                                        break;

                                    case 0x1:

                                        { /* STC GBR, Rn */

                                        uint32_t Rn = ((ir>>8)&0xF); 

                                        load_spreg( R_EAX, R_GBR );

                                        store_reg( R_EAX, Rn );

                                        }

                                        break;

                                    case 0x2:

                                        { /* STC VBR, Rn */

                                        uint32_t Rn = ((ir>>8)&0xF); 

                                        load_spreg( R_EAX, R_VBR );

                                        store_reg( R_EAX, Rn );

                                        }

                                        break;

                                    case 0x3:

                                        { /* STC SSR, Rn */

                                        uint32_t Rn = ((ir>>8)&0xF); 

                                        load_spreg( R_EAX, R_SSR );

                                        store_reg( R_EAX, Rn );

                                        }

                                        break;

                                    case 0x4:

                                        { /* STC SPC, Rn */

                                        uint32_t Rn = ((ir>>8)&0xF); 

                                        load_spreg( R_EAX, R_SPC );

                                        store_reg( R_EAX, Rn );

                                        }

                                        break;

                                    default:

                                        UNDEF();

                                        break;

                                }

                                break;

                            case 0x1:

                                { /* STC Rm_BANK, Rn */

                                uint32_t Rn = ((ir>>8)&0xF); uint32_t Rm_BANK = ((ir>>4)&0x7); 

                                load_spreg( R_EAX, REG_OFFSET(r_bank[Rm_BANK]) );

                                store_reg( R_EAX, Rn );

                                }

                                break;

                        }

                        break;

                    case 0x3:

                        switch( (ir&0xF0) >> 4 ) {

                            case 0x0:

                                { /* BSRF Rn */

                                uint32_t Rn = ((ir>>8)&0xF); 

                                if( sh4_x86.in_delay_slot ) {

                            	SLOTILLEGAL();

                                } else {

                            	load_imm32( R_EAX, pc + 4 );

                            	store_spreg( R_EAX, R_PR );

                            	load_reg( R_EDI, Rn );

                            	ADD_r32_r32( R_EAX, R_EDI );

                            	sh4_x86.in_delay_slot = TRUE;

                            	INC_r32(R_ESI);

                            	return 0;

                                }

                                }

                                break;

                            case 0x2:

                                { /* BRAF Rn */

                                uint32_t Rn = ((ir>>8)&0xF); 

                                if( sh4_x86.in_delay_slot ) {

                            	SLOTILLEGAL();

                                } else {

                            	load_reg( R_EDI, Rn );

                            	sh4_x86.in_delay_slot = TRUE;

                            	INC_r32(R_ESI);

                            	return 0;

                                }

                                }

                                break;

                            case 0x8:

                                { /* PREF @Rn */

                                uint32_t Rn = ((ir>>8)&0xF); 

                                load_reg( R_EAX, Rn );

                                PUSH_r32( R_EAX );

                                AND_imm32_r32( 0xFC000000, R_EAX );

                                CMP_imm32_r32( 0xE0000000, R_EAX );

                                JNE_rel8(8);

                                call_func0( sh4_flush_store_queue );

                                ADD_imm8s_r32( -4, R_ESP );

                                }

                                break;

                            case 0x9:

                                { /* OCBI @Rn */

                                uint32_t Rn = ((ir>>8)&0xF); 

                                }

                                break;

                            case 0xA:

                                { /* OCBP @Rn */

                                uint32_t Rn = ((ir>>8)&0xF); 

                                }

                                break;

                            case 0xB:

                                { /* OCBWB @Rn */

                                uint32_t Rn = ((ir>>8)&0xF); 

                                }

                                break;

                            case 0xC:

                                { /* MOVCA.L R0, @Rn */

                                uint32_t Rn = ((ir>>8)&0xF); 

                                load_reg( R_EAX, 0 );

                                load_reg( R_ECX, Rn );

                                check_walign32( R_ECX );

                                MEM_WRITE_LONG( R_ECX, R_EAX );

                                }

                                break;

                            default:

                                UNDEF();

                                break;

                        }

                        break;

                    case 0x4:

                        { /* MOV.B Rm, @(R0, Rn) */

                        uint32_t Rn = ((ir>>8)&0xF); uint32_t Rm = ((ir>>4)&0xF); 

                        load_reg( R_EAX, 0 );

                        load_reg( R_ECX, Rn );

                        ADD_r32_r32( R_EAX, R_ECX );

                        load_reg( R_EAX, Rm );

                        MEM_WRITE_BYTE( R_ECX, R_EAX );

                        }

                        break;

                    case 0x5:

                        { /* MOV.W Rm, @(R0, Rn) */

                        uint32_t Rn = ((ir>>8)&0xF); uint32_t Rm = ((ir>>4)&0xF); 

                        load_reg( R_EAX, 0 );

                        load_reg( R_ECX, Rn );

                        ADD_r32_r32( R_EAX, R_ECX );

                        check_walign16( R_ECX );

                        load_reg( R_EAX, Rm );

                        MEM_WRITE_WORD( R_ECX, R_EAX );

                        }

                        break;

                    case 0x6:

                        { /* MOV.L Rm, @(R0, Rn) */

                        uint32_t Rn = ((ir>>8)&0xF); uint32_t Rm = ((ir>>4)&0xF); 

                        load_reg( R_EAX, 0 );

                        load_reg( R_ECX, Rn );

                        ADD_r32_r32( R_EAX, R_ECX );

                        check_walign32( R_ECX );

                        load_reg( R_EAX, Rm );

                        MEM_WRITE_LONG( R_ECX, R_EAX );

                        }

                        break;

                    case 0x7:

                        { /* MUL.L Rm, Rn */

                        uint32_t Rn = ((ir>>8)&0xF); uint32_t Rm = ((ir>>4)&0xF); 

                        load_reg( R_EAX, Rm );

                        load_reg( R_ECX, Rn );

                        MUL_r32( R_ECX );

                        store_spreg( R_EAX, R_MACL );

                        }

                        break;

                    case 0x8:

                        switch( (ir&0xFF0) >> 4 ) {

                            case 0x0:

                                { /* CLRT */

                                CLC();

                                SETC_t();

                                }

                                break;

                            case 0x1:

                                { /* SETT */

                                STC();

                                SETC_t();

                                }

                                break;

                            case 0x2:

                                { /* CLRMAC */

                                XOR_r32_r32(R_EAX, R_EAX);

                                store_spreg( R_EAX, R_MACL );

                                store_spreg( R_EAX, R_MACH );

                                }

                                break;

                            case 0x3:

                                { /* LDTLB */

                                }

                                break;

                            case 0x4:

                                { /* CLRS */

                                CLC();

                                SETC_sh4r(R_S);

                                }

                                break;

                            case 0x5:

                                { /* SETS */

                                STC();

                                SETC_sh4r(R_S);

                                }

                                break;

                            default:

                                UNDEF();

                                break;

                        }

                        break;

                    case 0x9:

                        switch( (ir&0xF0) >> 4 ) {

                            case 0x0:

                                { /* NOP */

                                /* Do nothing. Well, we could emit an 0x90, but what would really be the point? */

                                }

                                break;

                            case 0x1:

                                { /* DIV0U */

                                XOR_r32_r32( R_EAX, R_EAX );

                                store_spreg( R_EAX, R_Q );

                                store_spreg( R_EAX, R_M );

                                store_spreg( R_EAX, R_T );

                                }

                                break;

                            case 0x2:

                                { /* MOVT Rn */

                                uint32_t Rn = ((ir>>8)&0xF); 

                                load_spreg( R_EAX, R_T );

                                store_reg( R_EAX, Rn );

                                }

                                break;

                            default:

                                UNDEF();

                                break;

                        }

                        break;

                    case 0xA:

                        switch( (ir&0xF0) >> 4 ) {

                            case 0x0:

                                { /* STS MACH, Rn */

                                uint32_t Rn = ((ir>>8)&0xF); 

                                load_spreg( R_EAX, R_MACH );

                                store_reg( R_EAX, Rn );

                                }

                                break;

                            case 0x1:

                                { /* STS MACL, Rn */

                                uint32_t Rn = ((ir>>8)&0xF); 

                                load_spreg( R_EAX, R_MACL );

                                store_reg( R_EAX, Rn );

                                }

                                break;

                            case 0x2:

                                { /* STS PR, Rn */

                                uint32_t Rn = ((ir>>8)&0xF); 

                                load_spreg( R_EAX, R_PR );

                                store_reg( R_EAX, Rn );

                                }

                                break;

                            case 0x3:

                                { /* STC SGR, Rn */

                                uint32_t Rn = ((ir>>8)&0xF); 

                                load_spreg( R_EAX, R_SGR );

                                store_reg( R_EAX, Rn );

                                }

                                break;

                            case 0x5:

                                { /* STS FPUL, Rn */

                                uint32_t Rn = ((ir>>8)&0xF); 

                                load_spreg( R_EAX, R_FPUL );

                                store_reg( R_EAX, Rn );

                                }

                                break;

                            case 0x6:

                                { /* STS FPSCR, Rn */

                                uint32_t Rn = ((ir>>8)&0xF); 

                                load_spreg( R_EAX, R_FPSCR );

                                store_reg( R_EAX, Rn );

                                }

                                break;

                            case 0xF:

                                { /* STC DBR, Rn */

                                uint32_t Rn = ((ir>>8)&0xF); 

                                load_spreg( R_EAX, R_DBR );

                                store_reg( R_EAX, Rn );

                                }

                                break;

                            default:

                                UNDEF();

                                break;

                        }

                        break;

                    case 0xB:

                        switch( (ir&0xFF0) >> 4 ) {

                            case 0x0:

                                { /* RTS */

                                if( sh4_x86.in_delay_slot ) {

                            	SLOTILLEGAL();

                                } else {

                            	load_spreg( R_EDI, R_PR );

                            	sh4_x86.in_delay_slot = TRUE;

                            	INC_r32(R_ESI);

                            	return 0;

                                }

                                }

                                break;

                            case 0x1:

                                { /* SLEEP */

                                /* TODO */

                                }

                                break;

                            case 0x2:

                                { /* RTE */

                                check_priv();

                                if( sh4_x86.in_delay_slot ) {

                            	SLOTILLEGAL();

                                } else {

                            	load_spreg( R_EDI, R_PR );

                            	load_spreg( R_EAX, R_SSR );

                            	call_func1( sh4_write_sr, R_EAX );

                            	sh4_x86.in_delay_slot = TRUE;

                            	INC_r32(R_ESI);

                            	return 0;

                                }

                                }

                                break;

                            default:

                                UNDEF();

                                break;

                        }

                        break;

                    case 0xC:

                        { /* MOV.B @(R0, Rm), Rn */

                        uint32_t Rn = ((ir>>8)&0xF); uint32_t Rm = ((ir>>4)&0xF); 

                        load_reg( R_EAX, 0 );

                        load_reg( R_ECX, Rm );

                        ADD_r32_r32( R_EAX, R_ECX );

                        MEM_READ_BYTE( R_ECX, R_EAX );

                        store_reg( R_EAX, Rn );

                        }

                        break;

                    case 0xD:

                        { /* MOV.W @(R0, Rm), Rn */

                        uint32_t Rn = ((ir>>8)&0xF); uint32_t Rm = ((ir>>4)&0xF); 

                        load_reg( R_EAX, 0 );

                        load_reg( R_ECX, Rm );

                        ADD_r32_r32( R_EAX, R_ECX );

                        check_ralign16( R_ECX );

                        MEM_READ_WORD( R_ECX, R_EAX );

                        store_reg( R_EAX, Rn );

                        }

                        break;

                    case 0xE:

                        { /* MOV.L @(R0, Rm), Rn */

                        uint32_t Rn = ((ir>>8)&0xF); uint32_t Rm = ((ir>>4)&0xF); 

                        load_reg( R_EAX, 0 );

                        load_reg( R_ECX, Rm );

                        ADD_r32_r32( R_EAX, R_ECX );

                        check_ralign32( R_ECX );

                        MEM_READ_LONG( R_ECX, R_EAX );

                        store_reg( R_EAX, Rn );

                        }

                        break;

                    case 0xF:

                        { /* MAC.L @Rm+, @Rn+ */

                        uint32_t Rn = ((ir>>8)&0xF); uint32_t Rm = ((ir>>4)&0xF); 

                        }

                        break;

                    default:

                        UNDEF();

                        break;

                }

                break;

            case 0x1:

                { /* MOV.L Rm, @(disp, Rn) */

                uint32_t Rn = ((ir>>8)&0xF); uint32_t Rm = ((ir>>4)&0xF); uint32_t disp = (ir&0xF)<<2; 

                load_reg( R_ECX, Rn );

                load_reg( R_EAX, Rm );

                ADD_imm32_r32( disp, R_ECX );

                check_walign32( R_ECX );

                MEM_WRITE_LONG( R_ECX, R_EAX );

                }

                break;

            case 0x2:

                switch( ir&0xF ) {

                    case 0x0:

                        { /* MOV.B Rm, @Rn */

                        uint32_t Rn = ((ir>>8)&0xF); uint32_t Rm = ((ir>>4)&0xF); 

                        load_reg( R_EAX, Rm );

                        load_reg( R_ECX, Rn );

                        MEM_WRITE_BYTE( R_ECX, R_EAX );

                        }

                        break;

                    case 0x1:

                        { /* MOV.W Rm, @Rn */

                        uint32_t Rn = ((ir>>8)&0xF); uint32_t Rm = ((ir>>4)&0xF); 

                        load_reg( R_ECX, Rn );

                        check_walign16( R_ECX );

                        MEM_READ_WORD( R_ECX, R_EAX );

                        store_reg( R_EAX, Rn );

                        }

                        break;

                    case 0x2:

                        { /* MOV.L Rm, @Rn */

                        uint32_t Rn = ((ir>>8)&0xF); uint32_t Rm = ((ir>>4)&0xF); 

                        load_reg( R_EAX, Rm );

                        load_reg( R_ECX, Rn );

                        check_walign32(R_ECX);

                        MEM_WRITE_LONG( R_ECX, R_EAX );

                        }

                        break;

                    case 0x4:

                        { /* MOV.B Rm, @-Rn */

                        uint32_t Rn = ((ir>>8)&0xF); uint32_t Rm = ((ir>>4)&0xF); 

                        load_reg( R_EAX, Rm );

                        load_reg( R_ECX, Rn );

                        ADD_imm8s_r32( -1, Rn );

                        store_reg( R_ECX, Rn );

                        MEM_WRITE_BYTE( R_ECX, R_EAX );

                        }

                        break;

                    case 0x5:

                        { /* MOV.W Rm, @-Rn */

                        uint32_t Rn = ((ir>>8)&0xF); uint32_t Rm = ((ir>>4)&0xF); 

                        load_reg( R_ECX, Rn );

                        check_walign16( R_ECX );

                        load_reg( R_EAX, Rm );

                        ADD_imm8s_r32( -2, R_ECX );

                        MEM_WRITE_WORD( R_ECX, R_EAX );

                        }

                        break;

                    case 0x6:

                        { /* MOV.L Rm, @-Rn */

                        uint32_t Rn = ((ir>>8)&0xF); uint32_t Rm = ((ir>>4)&0xF); 

                        load_reg( R_EAX, Rm );

                        load_reg( R_ECX, Rn );

                        check_walign32( R_ECX );

                        ADD_imm8s_r32( -4, R_ECX );

                        store_reg( R_ECX, Rn );

                        MEM_WRITE_LONG( R_ECX, R_EAX );

                        }

                        break;

                    case 0x7:

                        { /* DIV0S Rm, Rn */

                        uint32_t Rn = ((ir>>8)&0xF); uint32_t Rm = ((ir>>4)&0xF); 

                        load_reg( R_EAX, Rm );

                        load_reg( R_ECX, Rm );

                        SHR_imm8_r32( 31, R_EAX );

                        SHR_imm8_r32( 31, R_ECX );

                        store_spreg( R_EAX, R_M );

                        store_spreg( R_ECX, R_Q );

                        CMP_r32_r32( R_EAX, R_ECX );

                        SETE_t();

                        }

                        break;

                    case 0x8:

                        { /* TST Rm, Rn */

                        uint32_t Rn = ((ir>>8)&0xF); uint32_t Rm = ((ir>>4)&0xF); 

                        load_reg( R_EAX, Rm );

                        load_reg( R_ECX, Rn );

                        TEST_r32_r32( R_EAX, R_ECX );

                        SETE_t();

                        }

                        break;

                    case 0x9:

                        { /* AND Rm, Rn */

                        uint32_t Rn = ((ir>>8)&0xF); uint32_t Rm = ((ir>>4)&0xF); 

                        load_reg( R_EAX, Rm );

                        load_reg( R_ECX, Rn );

                        AND_r32_r32( R_EAX, R_ECX );

                        store_reg( R_ECX, Rn );

                        }

                        break;

                    case 0xA:

                        { /* XOR Rm, Rn */

                        uint32_t Rn = ((ir>>8)&0xF); uint32_t Rm = ((ir>>4)&0xF); 

                        load_reg( R_EAX, Rm );

                        load_reg( R_ECX, Rn );

                        XOR_r32_r32( R_EAX, R_ECX );

                        store_reg( R_ECX, Rn );

                        }

                        break;

                    case 0xB:

                        { /* OR Rm, Rn */

                        uint32_t Rn = ((ir>>8)&0xF); uint32_t Rm = ((ir>>4)&0xF); 

                        load_reg( R_EAX, Rm );

                        load_reg( R_ECX, Rn );

                        OR_r32_r32( R_EAX, R_ECX );

                        store_reg( R_ECX, Rn );

                        }

                        break;

                    case 0xC:

                        { /* CMP/STR Rm, Rn */

                        uint32_t Rn = ((ir>>8)&0xF); uint32_t Rm = ((ir>>4)&0xF); 

                        load_reg( R_EAX, Rm );

                        load_reg( R_ECX, Rn );

                        XOR_r32_r32( R_ECX, R_EAX );

                        TEST_r8_r8( R_AL, R_AL );

                        JE_rel8(13);

                        TEST_r8_r8( R_AH, R_AH ); // 2

                        JE_rel8(9);

                        SHR_imm8_r32( 16, R_EAX ); // 3

                        TEST_r8_r8( R_AL, R_AL ); // 2

                        JE_rel8(2);

                        TEST_r8_r8( R_AH, R_AH ); // 2

                        SETE_t();

                        }

                        break;

                    case 0xD:

                        { /* XTRCT Rm, Rn */

                        uint32_t Rn = ((ir>>8)&0xF); uint32_t Rm = ((ir>>4)&0xF); 

                        load_reg( R_EAX, Rm );

                        MOV_r32_r32( R_EAX, R_ECX );

                        SHR_imm8_r32( 16, R_EAX );

                        SHL_imm8_r32( 16, R_ECX );

                        OR_r32_r32( R_EAX, R_ECX );

                        store_reg( R_ECX, Rn );

                        }

                        break;

                    case 0xE:

                        { /* MULU.W Rm, Rn */

                        uint32_t Rn = ((ir>>8)&0xF); uint32_t Rm = ((ir>>4)&0xF); 

                        load_reg16u( R_EAX, Rm );

                        load_reg16u( R_ECX, Rn );

                        MUL_r32( R_ECX );

                        store_spreg( R_EAX, R_MACL );

                        }

                        break;

                    case 0xF:

                        { /* MULS.W Rm, Rn */

                        uint32_t Rn = ((ir>>8)&0xF); uint32_t Rm = ((ir>>4)&0xF); 

                        load_reg16s( R_EAX, Rm );

                        load_reg16s( R_ECX, Rn );

                        MUL_r32( R_ECX );

                        store_spreg( R_EAX, R_MACL );

                        }

                        break;

                    default:

                        UNDEF();

                        break;

                }