jri_md.h

linux下的flash播放器源程序

#define _jlong_lo16(a)		((a) & JRI_BITMASK(16))
#define _jlong_hi16(a)		((a) >> 16)

/*
 * Multiply 32-bit operands a and b to get 64-bit result r.
 * Use polynomial expansion based on primitive field element (1 << 16).
 */
#define jlong_MUL32(r, a, b) {                                            \
     juint _a1, _a0, _b1, _b0, _y0, _y1, _y2, _y3;                        \
     _a1 = _jlong_hi16(a), _a0 = _jlong_lo16(a);                          \
     _b1 = _jlong_hi16(b), _b0 = _jlong_lo16(b);                          \
     _y0 = _a0 * _b0;                                                     \
     _y1 = _a0 * _b1;                                                     \
     _y2 = _a1 * _b0;                                                     \
     _y3 = _a1 * _b1;                                                     \
     _y1 += _jlong_hi16(_y0);                   /* can't carry */         \
     _y1 += _y2;                                /* might carry */         \
     if (_y1 < _y2) _y3 += 1 << 16;             /* propagate */           \
     (r).lo = (_jlong_lo16(_y1) << 16) + _jlong_lo16(_y0);                \
     (r).hi = _y3 + _jlong_hi16(_y1);                                     \
}

/*
 * Divide 64-bit unsigned operand a by 64-bit unsigned operand b, setting *qp
 * to the 64-bit unsigned quotient, and *rp to the 64-bit unsigned remainder.
 * Minimize effort if one of qp and rp is null.
 */
#define jlong_UDIVMOD(qp, rp, a, b)	jlong_udivmod(qp, rp, a, b)

extern JRI_PUBLIC_API(void)
jlong_udivmod(julong *qp, julong *rp, julong a, julong b);

#define jlong_DIV(r, a, b) {                                              \
    jlong _a, _b;                                                         \
    juint _negative = (int32)(a).hi < 0;                                  \
    if (_negative) {                                                      \
	jlong_NEG(_a, a);                                                     \
    } else {                                                              \
	_a = a;                                                               \
    }                                                                     \
    if ((int32)(b).hi < 0) {                                              \
	_negative ^= 1;                                                       \
	jlong_NEG(_b, b);                                                     \
    } else {                                                              \
	_b = b;                                                               \
    }                                                                     \
    jlong_UDIVMOD(&(r), 0, _a, _b);                                       \
    if (_negative)                                                        \
	jlong_NEG(r, r);                                                      \
}

#define jlong_MOD(r, a, b) {                                              \
    jlong _a, _b;                                                         \
    juint _negative = (int32)(a).hi < 0;                                  \
    if (_negative) {                                                      \
	jlong_NEG(_a, a);                                                     \
    } else {                                                              \
	_a = a;                                                               \
    }                                                                     \
    if ((int32)(b).hi < 0) {                                              \
	jlong_NEG(_b, b);                                                     \
    } else {                                                              \
	_b = b;                                                               \
    }                                                                     \
    jlong_UDIVMOD(0, &(r), _a, _b);                                       \
    if (_negative)                                                        \
	jlong_NEG(r, r);                                                      \
}

/*
 * NB: b is a juint, not jlong or julong, for the shift ops.
 */
#define jlong_SHL(r, a, b) {                                              \
    if (b) {                                                              \
	jlong _a;                                                             \
        _a = a;                                                           \
        if ((b) < 32) {                                                   \
	    (r).lo = _a.lo << (b);                                            \
	    (r).hi = (_a.hi << (b)) | (_a.lo >> (32 - (b)));                  \
	} else {                                                              \
	    (r).lo = 0;                                                       \
	    (r).hi = _a.lo << ((b) & 31);                                     \
	}                                                                     \
    } else {                                                              \
	(r) = (a);                                                            \
    }                                                                     \
}

/* a is an int32, b is int32, r is jlong */
#define jlong_ISHL(r, a, b) {                                             \
    if (b) {                                                              \
	jlong _a;                                                             \
	_a.lo = (a);                                                          \
	_a.hi = 0;                                                            \
        if ((b) < 32) {                                                   \
	    (r).lo = (a) << (b);                                              \
	    (r).hi = ((a) >> (32 - (b)));                                     \
	} else {                                                              \
	    (r).lo = 0;                                                       \
	    (r).hi = (a) << ((b) & 31);                                       \
	}                                                                     \
    } else {                                                              \
	(r).lo = (a);                                                         \
	(r).hi = 0;                                                           \
    }                                                                     \
}

#define jlong_SHR(r, a, b) {                                              \
    if (b) {                                                              \
	jlong _a;                                                             \
        _a = a;                                                           \
	if ((b) < 32) {                                                       \
	    (r).lo = (_a.hi << (32 - (b))) | (_a.lo >> (b));                  \
	    (r).hi = (int32)_a.hi >> (b);                                     \
	} else {                                                              \
	    (r).lo = (int32)_a.hi >> ((b) & 31);                              \
	    (r).hi = (int32)_a.hi >> 31;                                      \
	}                                                                     \
    } else {                                                              \
	(r) = (a);                                                            \
    }                                                                     \
}

#define jlong_USHR(r, a, b) {                                             \
    if (b) {                                                              \
	jlong _a;                                                             \
        _a = a;                                                           \
	if ((b) < 32) {                                                       \
	    (r).lo = (_a.hi << (32 - (b))) | (_a.lo >> (b));                  \
	    (r).hi = _a.hi >> (b);                                            \
	} else {                                                              \
	    (r).lo = _a.hi >> ((b) & 31);                                     \
	    (r).hi = 0;                                                       \
	}                                                                     \
    } else {                                                              \
	(r) = (a);                                                            \
    }                                                                     \
}

#define jlong_L2I(i, l)		((i) = (l).lo)
#define jlong_L2UI(ui, l)	((ui) = (l).lo)
#define jlong_L2F(f, l)		{ double _d; jlong_L2D(_d, l); (f) = (float) _d; }

#define jlong_L2D(d, l) {                                                 \
    int32 _negative;                                                      \
    jlong _absval;                                                        \
                                                                          \
    _negative = (l).hi >> 31;                                             \
    if (_negative) {                                                      \
	jlong_NEG(_absval, l);                                                \
    } else {                                                              \
	_absval = l;                                                          \
    }                                                                     \
    (d) = (double)_absval.hi * 4.294967296e9 + _absval.lo;                \
    if (_negative)                                                        \
	(d) = -(d);                                                           \
}

#define jlong_I2L(l, i)		((l).hi = (i) >> 31, (l).lo = (i))
#define jlong_UI2L(l, ui)	((l).hi = 0, (l).lo = (ui))
#define jlong_F2L(l, f)		{ double _d = (double) f; jlong_D2L(l, _d); }

#define jlong_D2L(l, d) {                                                 \
    int _negative;                                                        \
    double _absval, _d_hi;                                                \
    jlong _lo_d;                                                          \
                                                                          \
    _negative = ((d) < 0);                                                \
    _absval = _negative ? -(d) : (d);                                     \
                                                                          \
    (l).hi = (juint)(_absval / 4.294967296e9);                            \
    (l).lo = 0;                                                           \
    jlong_L2D(_d_hi, l);                                                  \
    _absval -= _d_hi;                                                     \
    _lo_d.hi = 0;                                                         \
    if (_absval < 0) {                                                    \
	_lo_d.lo = (juint) -_absval;                                          \
	jlong_SUB(l, l, _lo_d);                                               \
    } else {                                                              \
	_lo_d.lo = (juint) _absval;                                           \
	jlong_ADD(l, l, _lo_d);                                               \
    }                                                                     \
                                                                          \
    if (_negative)                                                        \
	jlong_NEG(l, l);                                                      \
}

#endif /* !HAVE_LONG_LONG */

/******************************************************************************/
/*
** JDK Stuff -- This stuff is still needed while we're using the JDK
** dynamic linking strategy to call native methods.
*/

typedef union JRI_JDK_stack_item {
    /* Non pointer items */
    jint           i;
    jfloat         f;
    jint           o;
    /* Pointer items */
    void          *h;
    void          *p;
    unsigned char *addr;
#ifdef IS_64
    double         d;
    long           l;		/* == 64bits! */
#endif
} JRI_JDK_stack_item;

typedef union JRI_JDK_Java8Str {
    jint x[2];
    jdouble d;
    jlong l;
    void *p;
    float f;
} JRI_JDK_Java8;

#ifdef HAVE_ALIGNED_LONGLONGS
#define JRI_GET_INT64(_t,_addr) ( ((_t).x[0] = ((jint*)(_addr))[0]), \
                              ((_t).x[1] = ((jint*)(_addr))[1]),      \
                              (_t).l )
#define JRI_SET_INT64(_t, _addr, _v) ( (_t).l = (_v),                \
                                   ((jint*)(_addr))[0] = (_t).x[0], \
                                   ((jint*)(_addr))[1] = (_t).x[1] )
#else
#define JRI_GET_INT64(_t,_addr) (*(jlong*)(_addr))
#define JRI_SET_INT64(_t, _addr, _v) (*(jlong*)(_addr) = (_v))
#endif

/* If double's must be aligned on doubleword boundaries then define this */
#ifdef HAVE_ALIGNED_DOUBLES
#define JRI_GET_DOUBLE(_t,_addr) ( ((_t).x[0] = ((jint*)(_addr))[0]), \
                               ((_t).x[1] = ((jint*)(_addr))[1]),      \
                               (_t).d )
#define JRI_SET_DOUBLE(_t, _addr, _v) ( (_t).d = (_v),                \
                                    ((jint*)(_addr))[0] = (_t).x[0], \
                                    ((jint*)(_addr))[1] = (_t).x[1] )
#else
#define JRI_GET_DOUBLE(_t,_addr) (*(jdouble*)(_addr))
#define JRI_SET_DOUBLE(_t, _addr, _v) (*(jdouble*)(_addr) = (_v))
#endif

/******************************************************************************/
#ifdef __cplusplus
}
#endif
#endif /* JRI_MD_H */
/******************************************************************************/