op.c

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    RETURN();
}

void op_mtc0_datalo (void)
{
    env->CP0_DataLo = T0; /* XXX */
    RETURN();
}

void op_mtc0_taghi (void)
{
    env->CP0_TagHi = T0; /* XXX */
    RETURN();
}

void op_mtc0_datahi (void)
{
    env->CP0_DataHi = T0; /* XXX */
    RETURN();
}

void op_mtc0_errorepc (void)
{
    env->CP0_ErrorEPC = (int32_t)T0;
    RETURN();
}

void op_mtc0_desave (void)
{
    env->CP0_DESAVE = T0;
    RETURN();
}

void op_dmfc0_entrylo0 (void)
{
    T0 = env->CP0_EntryLo0;
    RETURN();
}

void op_dmfc0_entrylo1 (void)
{
    T0 = env->CP0_EntryLo1;
    RETURN();
}

void op_dmfc0_context (void)
{
    T0 = env->CP0_Context;
    RETURN();
}

void op_dmfc0_badvaddr (void)
{
    T0 = env->CP0_BadVAddr;
    RETURN();
}

void op_dmfc0_entryhi (void)
{
    T0 = env->CP0_EntryHi;
    RETURN();
}

void op_dmfc0_epc (void)
{
    T0 = env->CP0_EPC;
    RETURN();
}

void op_dmfc0_lladdr (void)
{
    T0 = env->CP0_LLAddr >> 4;
    RETURN();
}

void op_dmfc0_watchlo0 (void)
{
    T0 = env->CP0_WatchLo;
    RETURN();
}

void op_dmfc0_xcontext (void)
{
    T0 = env->CP0_XContext;
    RETURN();
}

void op_dmfc0_depc (void)
{
    T0 = env->CP0_DEPC;
    RETURN();
}

void op_dmfc0_errorepc (void)
{
    T0 = env->CP0_ErrorEPC;
    RETURN();
}

void op_dmtc0_entrylo0 (void)
{
    /* Large physaddr not implemented */
    /* 1k pages not implemented */
    env->CP0_EntryLo0 = T0 & 0x3FFFFFFF;
    RETURN();
}

void op_dmtc0_entrylo1 (void)
{
    /* Large physaddr not implemented */
    /* 1k pages not implemented */
    env->CP0_EntryLo1 = T0 & 0x3FFFFFFF;
    RETURN();
}

void op_dmtc0_context (void)
{
    env->CP0_Context = (env->CP0_Context & ~0x007FFFFF) | (T0 & 0x007FFFF0);
    RETURN();
}

void op_dmtc0_epc (void)
{
    env->CP0_EPC = T0;
    RETURN();
}

void op_dmtc0_watchlo0 (void)
{
    env->CP0_WatchLo = T0;
    RETURN();
}

void op_dmtc0_xcontext (void)
{
    env->CP0_XContext = T0; /* XXX */
    RETURN();
}

void op_dmtc0_depc (void)
{
    env->CP0_DEPC = T0;
    RETURN();
}

void op_dmtc0_errorepc (void)
{
    env->CP0_ErrorEPC = T0;
    RETURN();
}

#ifdef MIPS_USES_FPU

#if 0
# define DEBUG_FPU_STATE() CALL_FROM_TB1(dump_fpu, env)
#else
# define DEBUG_FPU_STATE() do { } while(0)
#endif

void op_cp1_enabled(void)
{
    if (!(env->CP0_Status & (1 << CP0St_CU1))) {
        CALL_FROM_TB2(do_raise_exception_err, EXCP_CpU, 1);
    }
    RETURN();
}

/* CP1 functions */
void op_cfc1 (void)
{
    if (T1 == 0) {
        T0 = env->fcr0;
    }
    else {
        /* fetch fcr31, masking unused bits */
        T0 = env->fcr31 & 0x0183FFFF;
    }
    DEBUG_FPU_STATE();
    RETURN();
}

/* convert MIPS rounding mode in FCR31 to IEEE library */
unsigned int ieee_rm[] = { 
    float_round_nearest_even,
    float_round_to_zero,
    float_round_up,
    float_round_down
};

#define RESTORE_ROUNDING_MODE \
    set_float_rounding_mode(ieee_rm[env->fcr31 & 3], &env->fp_status)

void op_ctc1 (void)
{
    if (T1 == 0) {
        /* XXX should this throw an exception?
         * don't write to FCR0.
         * env->fcr0 = T0; 
         */
    }
    else {
        /* store new fcr31, masking unused bits */  
        env->fcr31 = T0 & 0x0183FFFF;

        /* set rounding mode */
        RESTORE_ROUNDING_MODE;

#ifndef CONFIG_SOFTFLOAT
        /* no floating point exception for native float */
        SET_FP_ENABLE(env->fcr31, 0);
#endif
    }
    DEBUG_FPU_STATE();
    RETURN();
}

void op_mfc1 (void)
{
    T0 = WT0;
    DEBUG_FPU_STATE();
    RETURN();
}

void op_mtc1 (void)
{
    WT0 = T0;
    DEBUG_FPU_STATE();
    RETURN();
}

/* Float support.
   Single precition routines have a "s" suffix, double precision a
   "d" suffix.  */

#define FLOAT_OP(name, p) void OPPROTO op_float_##name##_##p(void)

FLOAT_OP(cvtd, s)
{
    FDT2 = float32_to_float64(WT0, &env->fp_status);
    DEBUG_FPU_STATE();
    RETURN();
}
FLOAT_OP(cvtd, w)
{
    FDT2 = int32_to_float64(WT0, &env->fp_status);
    DEBUG_FPU_STATE();
    RETURN();
}
FLOAT_OP(cvts, d)
{
    FST2 = float64_to_float32(FDT0, &env->fp_status);
    DEBUG_FPU_STATE();
    RETURN();
}
FLOAT_OP(cvts, w)
{
    FST2 = int32_to_float32(WT0, &env->fp_status);
    DEBUG_FPU_STATE();
    RETURN();
}
FLOAT_OP(cvtw, s)
{
    WT2 = float32_to_int32(FST0, &env->fp_status);
    DEBUG_FPU_STATE();
    RETURN();
}
FLOAT_OP(cvtw, d)
{
    WT2 = float64_to_int32(FDT0, &env->fp_status);
    DEBUG_FPU_STATE();
    RETURN();
}

FLOAT_OP(roundw, d)
{
    set_float_rounding_mode(float_round_nearest_even, &env->fp_status);
    WT2 = float64_round_to_int(FDT0, &env->fp_status);
    RESTORE_ROUNDING_MODE;

    DEBUG_FPU_STATE();
    RETURN();
}
FLOAT_OP(roundw, s)
{
    set_float_rounding_mode(float_round_nearest_even, &env->fp_status);
    WT2 = float32_round_to_int(FST0, &env->fp_status);
    RESTORE_ROUNDING_MODE;
    DEBUG_FPU_STATE();
    RETURN();
}

FLOAT_OP(truncw, d)
{
    WT2 = float64_to_int32_round_to_zero(FDT0, &env->fp_status);
    DEBUG_FPU_STATE();
    RETURN();
}
FLOAT_OP(truncw, s)
{
    WT2 = float32_to_int32_round_to_zero(FST0, &env->fp_status);
    DEBUG_FPU_STATE();
    RETURN();
}

FLOAT_OP(ceilw, d)
{
    set_float_rounding_mode(float_round_up, &env->fp_status);
    WT2 = float64_round_to_int(FDT0, &env->fp_status);
    RESTORE_ROUNDING_MODE;

    DEBUG_FPU_STATE();
    RETURN();
}
FLOAT_OP(ceilw, s)
{
    set_float_rounding_mode(float_round_up, &env->fp_status);
    WT2 = float32_round_to_int(FST0, &env->fp_status);
    RESTORE_ROUNDING_MODE;
    DEBUG_FPU_STATE();
    RETURN();
}

FLOAT_OP(floorw, d)
{
    set_float_rounding_mode(float_round_down, &env->fp_status);
    WT2 = float64_round_to_int(FDT0, &env->fp_status);
    RESTORE_ROUNDING_MODE;

    DEBUG_FPU_STATE();
    RETURN();
}
FLOAT_OP(floorw, s)
{
    set_float_rounding_mode(float_round_down, &env->fp_status);
    WT2 = float32_round_to_int(FST0, &env->fp_status);
    RESTORE_ROUNDING_MODE;
    DEBUG_FPU_STATE();
    RETURN();
}

/* binary operations */
#define FLOAT_BINOP(name) \
FLOAT_OP(name, d)         \
{                         \
    FDT2 = float64_ ## name (FDT0, FDT1, &env->fp_status);    \
    DEBUG_FPU_STATE();    \
}                         \
FLOAT_OP(name, s)         \
{                         \
    FST2 = float32_ ## name (FST0, FST1, &env->fp_status);    \
    DEBUG_FPU_STATE();    \
}
FLOAT_BINOP(add)
FLOAT_BINOP(sub)
FLOAT_BINOP(mul)
FLOAT_BINOP(div)
#undef FLOAT_BINOP

/* unary operations, modifying fp status  */
#define FLOAT_UNOP(name)  \
FLOAT_OP(name, d)         \
{                         \
    FDT2 = float64_ ## name(FDT0, &env->fp_status);   \
    DEBUG_FPU_STATE();    \
}                         \
FLOAT_OP(name, s)         \
{                         \
    FST2 = float32_ ## name(FST0, &env->fp_status);   \
    DEBUG_FPU_STATE();    \
}
FLOAT_UNOP(sqrt)
#undef FLOAT_UNOP

/* unary operations, not modifying fp status  */
#define FLOAT_UNOP(name)  \
FLOAT_OP(name, d)         \
{                         \
    FDT2 = float64_ ## name(FDT0);   \
    DEBUG_FPU_STATE();    \
}                         \
FLOAT_OP(name, s)         \
{                         \
    FST2 = float32_ ## name(FST0);   \
    DEBUG_FPU_STATE();    \
}
FLOAT_UNOP(abs)
FLOAT_UNOP(chs)
#undef FLOAT_UNOP

FLOAT_OP(mov, d)
{
    FDT2 = FDT0;
    DEBUG_FPU_STATE();
    RETURN();
}
FLOAT_OP(mov, s)
{
    FST2 = FST0;
    DEBUG_FPU_STATE();
    RETURN();
}

#ifdef CONFIG_SOFTFLOAT
#define clear_invalid() do {                                \
    int flags = get_float_exception_flags(&env->fp_status); \
    flags &= ~float_flag_invalid;                           \
    set_float_exception_flags(flags, &env->fp_status);      \
} while(0)
#else
#define clear_invalid() do { } while(0)
#endif

extern void dump_fpu_s(CPUState *env);

#define FOP_COND(fmt, op, sig, cond)           \
void op_cmp_ ## fmt ## _ ## op (void)          \
{                                              \
    if (cond)                                  \
        SET_FP_COND(env->fcr31);               \
    else                                       \
        CLEAR_FP_COND(env->fcr31);             \
    if (!sig)                                  \
        clear_invalid();                       \
    /*CALL_FROM_TB1(dump_fpu_s, env);*/ \
    DEBUG_FPU_STATE();                         \
    RETURN();                                  \
}

int float64_is_unordered(float64 a, float64 b STATUS_PARAM)
{
    if (float64_is_nan(a) || float64_is_nan(b)) {
        float_raise(float_flag_invalid, status);
        return 1;
    }
    else {
        return 0;
    }
}

FOP_COND(d, f,   0,                                                      0) 
FOP_COND(d, un,  0, float64_is_unordered(FDT1, FDT0, &env->fp_status))
FOP_COND(d, eq,  0,                                                      float64_eq(FDT0, FDT1, &env->fp_status))
FOP_COND(d, ueq, 0, float64_is_unordered(FDT1, FDT0, &env->fp_status) || float64_eq(FDT0, FDT1, &env->fp_status))
FOP_COND(d, olt, 0,                                                      float64_lt(FDT0, FDT1, &env->fp_status))
FOP_COND(d, ult, 0, float64_is_unordered(FDT1, FDT0, &env->fp_status) || float64_lt(FDT0, FDT1, &env->fp_status))
FOP_COND(d, ole, 0,                                                      float64_le(FDT0, FDT1, &env->fp_status))
FOP_COND(d, ule, 0, float64_is_unordered(FDT1, FDT0, &env->fp_status) || float64_le(FDT0, FDT1, &env->fp_status))
/* NOTE: the comma operator will make "cond" to eval to false,
 * but float*_is_unordered() is still called
 */
FOP_COND(d, sf,  1,                                                      (float64_is_unordered(FDT0, FDT1, &env->fp_status), 0))
FOP_COND(d, ngle,1, float64_is_unordered(FDT1, FDT0, &env->fp_status))
FOP_COND(d, seq, 1,                                                      float64_eq(FDT0, FDT1, &env->fp_status))
FOP_COND(d, ngl, 1, float64_is_unordered(FDT1, FDT0, &env->fp_status) || float64_eq(FDT0, FDT1, &env->fp_status))
FOP_COND(d, lt,  1,                                                      float64_lt(FDT0, FDT1, &env->fp_status))
FOP_COND(d, nge, 1, float64_is_unordered(FDT1, FDT0, &env->fp_status) || float64_lt(FDT0, FDT1, &env->fp_status))
FOP_COND(d, le,  1,                                                      float64_le(FDT0, FDT1, &env->fp_status))
FOP_COND(d, ngt, 1, float64_is_unordered(FDT1, FDT0, &env->fp_status) || float64_le(FDT0, FDT1, &env->fp_status))

flag float32_is_unordered(float32 a, float32 b STATUS_PARAM)
{
    extern flag float32_is_nan( float32 a );
    if (float32_is_nan(a) || float32_is_nan(b)) {
        float_raise(float_flag_invalid, status);
        return 1;
    }
    else {
        return 0;
    }
}

/* NOTE: the comma operator will make "cond" to eval to false,
 * but float*_is_unordered() is still called
 */
FOP_COND(s, f,   0,                                                      0) 
FOP_COND(s, un,  0, float32_is_unordered(FST1, FST0, &env->fp_status))
FOP_COND(s, eq,  0,                                                      float32_eq(FST0, FST1, &env->fp_status))
FOP_COND(s, ueq, 0, float32_is_unordered(FST1, FST0, &env->fp_status) || float32_eq(FST0, FST1, &env->fp_status))
FOP_COND(s, olt, 0,                                                      float32_lt(FST0, FST1, &env->fp_status))
FOP_COND(s, ult, 0, float32_is_unordered(FST1, FST0, &env->fp_status) || float32_lt(FST0, FST1, &env->fp_status))
FOP_COND(s, ole, 0,                                                      float32_le(FST0, FST1, &env->fp_status))
FOP_COND(s, ule, 0, float32_is_unordered(FST1, FST0, &env->fp_status) || float32_le(FST0, FST1, &env->fp_status))
/* NOTE: the comma operator will make "cond" to eval to false,
 * but float*_is_unordered() is still called
 */
FOP_COND(s, sf,  1,                                                      (float32_is_unordered(FST0, FST1, &env->fp_status), 0))
FOP_COND(s, ngle,1, float32_is_unordered(FST1, FST0, &env->fp_status))
FOP_COND(s, seq, 1,                                                      float32_eq(FST0, FST1, &env->fp_status))
FOP_COND(s, ngl, 1, float32_is_unordered(FST1, FST0, &env->fp_status) || float32_eq(FST0, FST1, &env->fp_status))
FOP_COND(s, lt,  1,                                                      float32_lt(FST0, FST1, &env->fp_status))
FOP_COND(s, nge, 1, float32_is_unordered(FST1, FST0, &env->fp_status) || float32_lt(FST0, FST1, &env->fp_status))
FOP_COND(s, le,  1,                                                      float32_le(FST0, FST1, &env->fp_status))
FOP_COND(s, ngt, 1, float32_is_unordered(FST1, FST0, &env->fp_status) || float32_le(FST0, FST1, &env->fp_status))

void op_bc1f (void)
{
    T0 = ! IS_FP_COND_SET(env->fcr31);
    DEBUG_FPU_STATE();
    RETURN();
}

void op_bc1t (void)
{
    T0 = IS_FP_COND_SET(env->fcr31);
    DEBUG_FPU_STATE();
    RETURN();
}
#endif /* MIPS_USES_FPU */

#if defined(MIPS_USES_R4K_TLB)
void op_tlbwi (void)
{
    CALL_FROM_TB0(do_tlbwi);
    RETURN();
}

void op_tlbwr (void)
{
    CALL_FROM_TB0(do_tlbwr);
    RETURN();
}

void op_tlbp (void)
{
    CALL_FROM_TB0(do_tlbp);
    RETURN();
}

void op_tlbr (void)
{
    CALL_FROM_TB0(do_tlbr);
    RETURN();
}
#endif

/* Specials */
void op_pmon (void)
{
    CALL_FROM_TB1(do_pmon, PARAM1);
    RETURN();
}

void op_di (void)
{
    T0 = env->CP0_Status;
    env->CP0_Status = T0 & ~(1 << CP0St_IE);
    CALL_FROM_TB1(cpu_mips_update_irq, env);
    RETURN();
}

void op_ei (void)
{
    T0 = env->CP0_Status;
    env->CP0_Status = T0 | (1 << CP0St_IE);
    CALL_FROM_TB1(cpu_mips_update_irq, env);
    RETURN();
}

void op_trap (void)
{
    if (T0) {
        CALL_FROM_TB1(do_raise_exception_direct, EXCP_TRAP);
    }
    RETURN();
}

void op_debug (void)
{
    CALL_FROM_TB1(do_raise_exception, EXCP_DEBUG);
    RETURN();
}

void op_set_lladdr (void)
{
    env->CP0_LLAddr = T2;
    RETURN();
}

void debug_eret (void);
void op_eret (void)
{
    CALL_FROM_TB0(debug_eret);
    if (env->hflags & MIPS_HFLAG_ERL) {
        env->PC = env->CP0_ErrorEPC;
        env->hflags &= ~MIPS_HFLAG_ERL;
	env->CP0_Status &= ~(1 << CP0St_ERL);
    } else {
        env->PC = env->CP0_EPC;
        env->hflags &= ~MIPS_HFLAG_EXL;
	env->CP0_Status &= ~(1 << CP0St_EXL);
    }
    env->CP0_LLAddr = 1;
    RETURN();
}

void op_deret (void)
{
    CALL_FROM_TB0(debug_eret);
    env->PC = env->CP0_DEPC;
    RETURN();
}

void op_rdhwr_cpunum(void)
{
    if (env->CP0_HWREna & (1 << 0))
       T0 = env->CP0_EBase & 0x2ff;
    else
       CALL_FROM_TB1(do_raise_exception_direct, EXCP_RI);
    RETURN();
}

void op_rdhwr_synci_step(void)
{
    if (env->CP0_HWREna & (1 << 1))
       T0 = env->SYNCI_Step;
    else
       CALL_FROM_TB1(do_raise_exception_direct, EXCP_RI);
    RETURN();
}

void op_rdhwr_cc(void)
{
    if (env->CP0_HWREna & (1 << 2))
       T0 = env->CP0_Count;
    else
       CALL_FROM_TB1(do_raise_exception_direct, EXCP_RI);
    RETURN();
}

void op_rdhwr_ccres(void)
{
    if (env->CP0_HWREna & (1 << 3))
       T0 = env->CCRes;
    else
       CALL_FROM_TB1(do_raise_exception_direct, EXCP_RI);
    RETURN();
}

void op_save_state (void)
{
    env->hflags = PARAM1;
    RETURN();
}

void op_save_pc (void)
{
    env->PC = PARAM1;
    RETURN();
}

void op_raise_exception (void)
{
    CALL_FROM_TB1(do_raise_exception, PARAM1);
    RETURN();
}

void op_raise_exception_err (void)
{
    CALL_FROM_TB2(do_raise_exception_err, PARAM1, PARAM2);
    RETURN();
}

void op_exit_tb (void)
{
    EXIT_TB();
    RETURN();
}

void op_wait (void)
{
    env->halted = 1;
    CALL_FROM_TB1(do_raise_exception, EXCP_HLT);
    RETURN();
}

/* Bitfield operations. */
void op_ext(void)
{
    unsigned int pos = PARAM1;
    unsigned int size = PARAM2;

    T0 = ((uint32_t)T1 >> pos) & ((1 << size) - 1);
    RETURN();
}

void op_ins(void)
{
    unsigned int pos = PARAM1;
    unsigned int size = PARAM2;
    target_ulong mask = ((1 << size) - 1) << pos;

    T0 = (T2 & ~mask) | (((uint32_t)T1 << pos) & mask);
    RETURN();
}

void op_wsbh(void)
{
    T0 = ((T1 << 8) & ~0x00FF00FF) | ((T1 >> 8) & 0x00FF00FF);
    RETURN();
}

#ifdef MIPS_HAS_MIPS64
void op_dext(void)
{
    unsigned int pos = PARAM1;
    unsigned int size = PARAM2;

    T0 = (T1 >> pos) & ((1 << size) - 1);
    RETURN();
}

void op_dins(void)
{
    unsigned int pos = PARAM1;
    unsigned int size = PARAM2;
    target_ulong mask = ((1 << size) - 1) << pos;

    T0 = (T2 & ~mask) | ((T1 << pos) & mask);
    RETURN();
}

void op_dsbh(void)
{
    T0 = ((T1 << 8) & ~0x00FF00FF00FF00FFULL) | ((T1 >> 8) & 0x00FF00FF00FF00FFULL);
    RETURN();
}

void op_dshd(void)
{
    T0 = ((T1 << 16) & ~0x0000FFFF0000FFFFULL) | ((T1 >> 16) & 0x0000FFFF0000FFFFULL);
    RETURN();
}
#endif

void op_seb(void)
{
    T0 = ((T1 & 0xFF) ^ 0x80) - 0x80;
    RETURN();
}

void op_seh(void)
{
    T0 = ((T1 & 0xFFFF) ^ 0x8000) - 0x8000;
    RETURN();
}