snes9x/apu/bapu/smp/core/opcycle_misc.cpp

697 lines
9.3 KiB
C++

case 0x00: {
switch(opcode_cycle++) {
case 1:
op_io();
opcode_cycle = 0;
break;
}
break;
}
case 0xef: {
switch(opcode_cycle++) {
case 1:
op_io();
break;
case 2:
op_io();
regs.pc--;
opcode_cycle = 0;
break;
}
break;
}
case 0xff: {
switch(opcode_cycle++) {
case 1:
op_io();
break;
case 2:
op_io();
regs.pc--;
opcode_cycle = 0;
break;
}
break;
}
case 0x9f: {
switch(opcode_cycle++) {
case 1:
op_io();
break;
case 2:
op_io();
break;
case 3:
op_io();
break;
case 4:
op_io();
regs.a = (regs.a >> 4) | (regs.a << 4);
regs.p.n = !!(regs.a & 0x80);
regs.p.z = (regs.a == 0);
opcode_cycle = 0;
break;
}
break;
}
case 0xdf: {
switch(opcode_cycle++) {
case 1:
op_io();
break;
case 2:
op_io();
if(regs.p.c || (regs.a) > 0x99) {
regs.a += 0x60;
regs.p.c = 1;
}
if(regs.p.h || (regs.a & 15) > 0x09) {
regs.a += 0x06;
}
regs.p.n = !!(regs.a & 0x80);
regs.p.z = (regs.a == 0);
opcode_cycle = 0;
break;
}
break;
}
case 0xbe: {
switch(opcode_cycle++) {
case 1:
op_io();
break;
case 2:
op_io();
if(!regs.p.c || (regs.a) > 0x99) {
regs.a -= 0x60;
regs.p.c = 0;
}
if(!regs.p.h || (regs.a & 15) > 0x09) {
regs.a -= 0x06;
}
regs.p.n = !!(regs.a & 0x80);
regs.p.z = (regs.a == 0);
opcode_cycle = 0;
break;
}
break;
}
case 0x60: {
switch(opcode_cycle++) {
case 1:
op_io();
regs.p.c = 0;
opcode_cycle = 0;
break;
}
break;
}
case 0x20: {
switch(opcode_cycle++) {
case 1:
op_io();
regs.p.p = 0;
opcode_cycle = 0;
break;
}
break;
}
case 0x80: {
switch(opcode_cycle++) {
case 1:
op_io();
regs.p.c = 1;
opcode_cycle = 0;
break;
}
break;
}
case 0x40: {
switch(opcode_cycle++) {
case 1:
op_io();
regs.p.p = 1;
opcode_cycle = 0;
break;
}
break;
}
case 0xe0: {
switch(opcode_cycle++) {
case 1:
op_io();
regs.p.v = 0;
regs.p.h = 0;
opcode_cycle = 0;
break;
}
break;
}
case 0xed: {
switch(opcode_cycle++) {
case 1:
op_io();
break;
case 2:
op_io();
regs.p.c = !regs.p.c;
opcode_cycle = 0;
break;
}
break;
}
case 0xa0: {
switch(opcode_cycle++) {
case 1:
op_io();
break;
case 2:
op_io();
regs.p.i = 1;
opcode_cycle = 0;
break;
}
break;
}
case 0xc0: {
switch(opcode_cycle++) {
case 1:
op_io();
break;
case 2:
op_io();
regs.p.i = 0;
opcode_cycle = 0;
break;
}
break;
}
case 0x02: {
switch(opcode_cycle++) {
case 1:
dp = op_readpc();
break;
case 2:
rd = op_readdp(dp);
break;
case 3:
rd |= 0x01;
op_writedp(dp, rd);
opcode_cycle = 0;
break;
}
break;
}
case 0x12: {
switch(opcode_cycle++) {
case 1:
dp = op_readpc();
break;
case 2:
rd = op_readdp(dp);
break;
case 3:
rd &= ~0x01;
op_writedp(dp, rd);
opcode_cycle = 0;
break;
}
break;
}
case 0x22: {
switch(opcode_cycle++) {
case 1:
dp = op_readpc();
break;
case 2:
rd = op_readdp(dp);
break;
case 3:
rd |= 0x02;
op_writedp(dp, rd);
opcode_cycle = 0;
break;
}
break;
}
case 0x32: {
switch(opcode_cycle++) {
case 1:
dp = op_readpc();
break;
case 2:
rd = op_readdp(dp);
break;
case 3:
rd &= ~0x02;
op_writedp(dp, rd);
opcode_cycle = 0;
break;
}
break;
}
case 0x42: {
switch(opcode_cycle++) {
case 1:
dp = op_readpc();
break;
case 2:
rd = op_readdp(dp);
break;
case 3:
rd |= 0x04;
op_writedp(dp, rd);
opcode_cycle = 0;
break;
}
break;
}
case 0x52: {
switch(opcode_cycle++) {
case 1:
dp = op_readpc();
break;
case 2:
rd = op_readdp(dp);
break;
case 3:
rd &= ~0x04;
op_writedp(dp, rd);
opcode_cycle = 0;
break;
}
break;
}
case 0x62: {
switch(opcode_cycle++) {
case 1:
dp = op_readpc();
break;
case 2:
rd = op_readdp(dp);
break;
case 3:
rd |= 0x08;
op_writedp(dp, rd);
opcode_cycle = 0;
break;
}
break;
}
case 0x72: {
switch(opcode_cycle++) {
case 1:
dp = op_readpc();
break;
case 2:
rd = op_readdp(dp);
break;
case 3:
rd &= ~0x08;
op_writedp(dp, rd);
opcode_cycle = 0;
break;
}
break;
}
case 0x82: {
switch(opcode_cycle++) {
case 1:
dp = op_readpc();
break;
case 2:
rd = op_readdp(dp);
break;
case 3:
rd |= 0x10;
op_writedp(dp, rd);
opcode_cycle = 0;
break;
}
break;
}
case 0x92: {
switch(opcode_cycle++) {
case 1:
dp = op_readpc();
break;
case 2:
rd = op_readdp(dp);
break;
case 3:
rd &= ~0x10;
op_writedp(dp, rd);
opcode_cycle = 0;
break;
}
break;
}
case 0xa2: {
switch(opcode_cycle++) {
case 1:
dp = op_readpc();
break;
case 2:
rd = op_readdp(dp);
break;
case 3:
rd |= 0x20;
op_writedp(dp, rd);
opcode_cycle = 0;
break;
}
break;
}
case 0xb2: {
switch(opcode_cycle++) {
case 1:
dp = op_readpc();
break;
case 2:
rd = op_readdp(dp);
break;
case 3:
rd &= ~0x20;
op_writedp(dp, rd);
opcode_cycle = 0;
break;
}
break;
}
case 0xc2: {
switch(opcode_cycle++) {
case 1:
dp = op_readpc();
break;
case 2:
rd = op_readdp(dp);
break;
case 3:
rd |= 0x40;
op_writedp(dp, rd);
opcode_cycle = 0;
break;
}
break;
}
case 0xd2: {
switch(opcode_cycle++) {
case 1:
dp = op_readpc();
break;
case 2:
rd = op_readdp(dp);
break;
case 3:
rd &= ~0x40;
op_writedp(dp, rd);
opcode_cycle = 0;
break;
}
break;
}
case 0xe2: {
switch(opcode_cycle++) {
case 1:
dp = op_readpc();
break;
case 2:
rd = op_readdp(dp);
break;
case 3:
rd |= 0x80;
op_writedp(dp, rd);
opcode_cycle = 0;
break;
}
break;
}
case 0xf2: {
switch(opcode_cycle++) {
case 1:
dp = op_readpc();
break;
case 2:
rd = op_readdp(dp);
break;
case 3:
rd &= ~0x80;
op_writedp(dp, rd);
opcode_cycle = 0;
break;
}
break;
}
case 0x2d: {
switch(opcode_cycle++) {
case 1:
op_io();
break;
case 2:
op_io();
break;
case 3:
op_writestack(regs.a);
opcode_cycle = 0;
break;
}
break;
}
case 0x4d: {
switch(opcode_cycle++) {
case 1:
op_io();
break;
case 2:
op_io();
break;
case 3:
op_writestack(regs.x);
opcode_cycle = 0;
break;
}
break;
}
case 0x6d: {
switch(opcode_cycle++) {
case 1:
op_io();
break;
case 2:
op_io();
break;
case 3:
op_writestack(regs.y);
opcode_cycle = 0;
break;
}
break;
}
case 0x0d: {
switch(opcode_cycle++) {
case 1:
op_io();
break;
case 2:
op_io();
break;
case 3:
op_writestack(regs.p);
opcode_cycle = 0;
break;
}
break;
}
case 0xae: {
switch(opcode_cycle++) {
case 1:
op_io();
break;
case 2:
op_io();
break;
case 3:
regs.a = op_readstack();
opcode_cycle = 0;
break;
}
break;
}
case 0xce: {
switch(opcode_cycle++) {
case 1:
op_io();
break;
case 2:
op_io();
break;
case 3:
regs.x = op_readstack();
opcode_cycle = 0;
break;
}
break;
}
case 0xee: {
switch(opcode_cycle++) {
case 1:
op_io();
break;
case 2:
op_io();
break;
case 3:
regs.y = op_readstack();
opcode_cycle = 0;
break;
}
break;
}
case 0x8e: {
switch(opcode_cycle++) {
case 1:
op_io();
break;
case 2:
op_io();
break;
case 3:
regs.p = op_readstack();
opcode_cycle = 0;
break;
}
break;
}
case 0xcf: {
switch(opcode_cycle++) {
case 1:
op_io();
break;
case 2:
op_io();
break;
case 3:
op_io();
break;
case 4:
op_io();
break;
case 5:
op_io();
break;
case 6:
op_io();
break;
case 7:
op_io();
break;
case 8:
op_io();
ya = regs.y * regs.a;
regs.a = ya;
regs.y = ya >> 8;
//result is set based on y (high-byte) only
regs.p.n = !!(regs.y & 0x80);
regs.p.z = (regs.y == 0);
opcode_cycle = 0;
break;
}
break;
}
case 0x9e: {
switch(opcode_cycle++) {
case 1:
op_io();
break;
case 2:
op_io();
break;
case 3:
op_io();
break;
case 4:
op_io();
break;
case 5:
op_io();
break;
case 6:
op_io();
break;
case 7:
op_io();
break;
case 8:
op_io();
break;
case 9:
op_io();
break;
case 10:
op_io();
break;
case 11:
op_io();
ya = regs.ya;
//overflow set if quotient >= 256
regs.p.v = !!(regs.y >= regs.x);
regs.p.h = !!((regs.y & 15) >= (regs.x & 15));
if(regs.y < (regs.x << 1)) {
//if quotient is <= 511 (will fit into 9-bit result)
regs.a = ya / regs.x;
regs.y = ya % regs.x;
} else {
//otherwise, the quotient won't fit into regs.p.v + regs.a
//this emulates the odd behavior of the S-SMP in this case
regs.a = 255 - (ya - (regs.x << 9)) / (256 - regs.x);
regs.y = regs.x + (ya - (regs.x << 9)) % (256 - regs.x);
}
//result is set based on a (quotient) only
regs.p.n = !!(regs.a & 0x80);
regs.p.z = (regs.a == 0);
opcode_cycle = 0;
break;
}
break;
}