op_mem.h

qemu虚拟机代码

/***                             Integer load                              ***/
#define SPARC_LD_OP(name, qp)                                                 \
void OPPROTO glue(glue(op_, name), MEMSUFFIX)(void)                           \
{                                                                             \
    T1 = (target_ulong)glue(qp, MEMSUFFIX)(T0);				\
}

#define SPARC_LD_OP_S(name, qp)						\
    void OPPROTO glue(glue(op_, name), MEMSUFFIX)(void)			\
    {									\
	T1 = (target_long)glue(qp, MEMSUFFIX)(T0);			\
    }

#define SPARC_ST_OP(name, op)                                                 \
void OPPROTO glue(glue(op_, name), MEMSUFFIX)(void)                           \
{                                                                             \
    glue(op, MEMSUFFIX)(T0, T1);                                      \
}

SPARC_LD_OP(ld, ldl);
SPARC_LD_OP(ldub, ldub);
SPARC_LD_OP(lduh, lduw);
SPARC_LD_OP_S(ldsb, ldsb);
SPARC_LD_OP_S(ldsh, ldsw);

/***                              Integer store                            ***/
SPARC_ST_OP(st, stl);
SPARC_ST_OP(stb, stb);
SPARC_ST_OP(sth, stw);

void OPPROTO glue(op_std, MEMSUFFIX)(void)
{
    glue(stl, MEMSUFFIX)(T0, T1);
    glue(stl, MEMSUFFIX)((T0 + 4), T2);
}

void OPPROTO glue(op_ldstub, MEMSUFFIX)(void)
{
    T1 = glue(ldub, MEMSUFFIX)(T0);
    glue(stb, MEMSUFFIX)(T0, 0xff);     /* XXX: Should be Atomically */
}

void OPPROTO glue(op_swap, MEMSUFFIX)(void)
{
    target_ulong tmp = glue(ldl, MEMSUFFIX)(T0);
    glue(stl, MEMSUFFIX)(T0, T1);       /* XXX: Should be Atomically */
    T1 = tmp;
}

void OPPROTO glue(op_ldd, MEMSUFFIX)(void)
{
    T1 = glue(ldl, MEMSUFFIX)(T0);
    T0 = glue(ldl, MEMSUFFIX)((T0 + 4));
}

/***                         Floating-point store                          ***/
void OPPROTO glue(op_stf, MEMSUFFIX) (void)
{
    glue(stfl, MEMSUFFIX)(T0, FT0);
}

void OPPROTO glue(op_stdf, MEMSUFFIX) (void)
{
    glue(stfq, MEMSUFFIX)(T0, DT0);
}

/***                         Floating-point load                           ***/
void OPPROTO glue(op_ldf, MEMSUFFIX) (void)
{
    FT0 = glue(ldfl, MEMSUFFIX)(T0);
}

void OPPROTO glue(op_lddf, MEMSUFFIX) (void)
{
    DT0 = glue(ldfq, MEMSUFFIX)(T0);
}

#ifdef TARGET_SPARC64
/* XXX: Should be Atomically */
/* XXX: There are no cas[x] instructions, only cas[x]a */
void OPPROTO glue(op_cas, MEMSUFFIX)(void)
{
    uint32_t tmp;

    tmp = glue(ldl, MEMSUFFIX)(T0);
    T2 &=  0xffffffffULL;
    if (tmp == (T1 & 0xffffffffULL)) {
	glue(stl, MEMSUFFIX)(T0, T2);
    }
    T2 = tmp;
}

void OPPROTO glue(op_casx, MEMSUFFIX)(void)
{
    uint64_t tmp;

    // XXX
    tmp = (uint64_t)glue(ldl, MEMSUFFIX)(T0) << 32;
    tmp |= glue(ldl, MEMSUFFIX)(T0);
    if (tmp == T1) {
	glue(stq, MEMSUFFIX)(T0, T2);
    }
    T2 = tmp;
}

void OPPROTO glue(op_ldsw, MEMSUFFIX)(void)
{
    T1 = (int64_t)(glue(ldl, MEMSUFFIX)(T0) & 0xffffffff);
}

SPARC_LD_OP(ldx, ldq);
SPARC_ST_OP(stx, stq);
#endif
#undef MEMSUFFIX