void mul()
{
uint16_t r = (uint16_t)ra * (uint16_t)rb;
SET_Z16(r);
ccc = btst(rb, 0x80);
SETRD(r);
}
/* $04 LSRD inherent -0*-* */
INLINE void lsrd (void)
{
UINT16 t;
CLR_NZVC; t = D; CC|=(t&0x0001);
t>>=1; SET_Z16(t);
if (NXORC) SEV;
D=t;
}
/* $bc CMPX extended -***- */
INLINE void cmpx_ex( void )
{
#if 0
UINT32 r,d;
PAIR b;
EXTWORD(b);
d = X;
r = d - b.d;
CLR_NZV;
SET_NZ16(r); SET_V16(d,b.d,r);
#else
PAIR r,d,b;
EXTWORD(b);
d.d = X;
r.w.l = d.b.h - b.b.h;
CLR_NZV;
SET_N8(r.b.l);
SET_V8(d.b.h, b.b.h, r.w.l);
r.d = d.d - b.d;
SET_Z16(r.d);
#endif
}
void leay()
{
ry = GET_EAW;
SET_Z16(ry);
}
void leax()
{
rx = GET_EAW;
SET_Z16(rx);
}
/* $09 DEX inherent --*-- */
INLINE void dex (void)
{
--X;
CLR_Z; SET_Z16(X);
}
/* $08 INX inherent --*-- */
INLINE void inx (void)
{
++X;
CLR_Z; SET_Z16(X);
}
/* $04 LSRD inherent -0*-* */
INLINE void lsrd (void)
{
UINT16 t;
CLR_NZC; t = D; CC|=(t&0x0001);
t>>=1; SET_Z16(t); D=t;
}