#define regx(x) csp->ram[reg_##x]
#define ramx(x) csp->ram[x]
#define romx(x) csp->rom[x]
#define bit(a) (ramx((a) & 0xf8) & (1 << ((a) & 0x07)))
#define bit_set(a) ramx((a) & 0xf8) |= (1 << ((a) & 0x07))
#define bit_clr(a) ramx((a) & 0xf8) &= ~((uint8)(1 << ((a) & 0x07)))
#define addr_l(a) ((uint16)(a))
#define addr_h3(a) ((((uint16)(a)) & 0xe0) << 3)
#define addr_h8(a) (((uint16)(a)) << 0x08)
#define acc regx(acc)
#define b regx(b)
#define psw regx(psw)
#define sp regx(sp)
#define dpl regx(dpl)
#define dph regx(dph)
#define dptr ((uint16)dph << 0x08) | dpl
#define p0 regx(p0)
#define p1 regx(p1)
#define p2 regx(p2)
#define p3 regx(p3)
#define ip regx(ip)
#define ie regx(ie)
#define tmod regx(tmod)
#define tcon regx(tcon)
#define t2con regx(t2con)
#define th0 regx(th0)
#define tl0 regx(tl0)
#define th1 regx(th1)
#define tl1 regx(tl1)
#define th2 regx(th2)
#define tl2 regx(tl2)
#define rcap2h regx(rcap2h)
#define rcap2l regx(rcap2l)
#define scon regx(scon)
#define sbuf regx(sbuf)
#define pcon regx(pcon)
#define rx(x) ramx(((regx(psw) >> 0x03) & 0x03) * 0x08 + (x) & 0x07)
#define rn rx(romx(cip))
#define r0 rx(0)
#define r1 rx(1)
#define r2 rx(2)
#define r3 rx(3)
#define r4 rx(4)
#define r5 rx(5)
#define r6 rx(6)
#define r7 rx(7)
#define flag_cy reg_psw ^ 7
#define flag_ac reg_psw ^ 6
#define flag_f0 reg_psw ^ 5
#define flag_r1 reg_psw ^ 4
#define flag_r0 reg_psw ^ 3
#define flag_ov reg_psw ^ 2
#define stack ramx(sp)
#define cip csp->sip
#define pc csp->ip
#define pc_low (pc & 0xff)
#define pc_high ((pc >> 0x08) & 0xff)
#define set_pc(h, l)pc = (uint16)((h) << 0x08) | ((l) & 0xff)
#define set_pcw(n) pc = (uint16)(n)
#define set_pcr(r) pc = (uint16)(pc + (r))
#define push(n) regx(sp) += 1; stack = (n)
#define push_pc() push(pc_low); push(pc_high)
#define pop() stack; regx(sp) -= 1
#define pop_pc() pc = pop(); pc <<= 0x08; pc |= pop()
#define addr8u romx(cip + 1) ///< 第乙個8-bit絕對位址。
#define addr8s ((char)romx(cip + 1)) ///< 第乙個8-bit相對位址。
#define addr8u2 romx(cip + 2) ///< 第二個8-bit絕對位址。
#define addr8s2 ((char)romx(cip + 2)) ///< 第二個8-bit相對位址。
#define addr11 (addr_h3(romx(cip)) | addr_l(addr8u))
#define addr16 (addr_h8(addr8u) | addr_l(addr8u2))
#define code8 romx(acc + dptr)
#define code16 (code8 << 0x08) | romx(acc + dptr + 1)
#define code8_rel romx(acc + pc)
#define code16_rel (code8_rel << 0x08) | romx(acc + pc + 1)
#define data8 ramx(addr8u)
#define data8u2 ramx(addr8u2)
#define data16 ((uint16)ramx(addr8u) << 0x08) | ramx(addr8u + 1)
#define datar0 ramx(r0)
#define datar1 ramx(r1)
#define datarn ramx(rx(romx(cip) & 0x01))
#define data_dptr ramx(dptr)
#define imm8u addr8u
#define imm8s addr8s
#define imm8u2 addr8u2
#define imm8s2 addr8s2
#define imm16 addr16
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