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snes9x
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Start converting some opcodes to cycle-based.

This commit is contained in:
Brandon Wright 2011-09-14 12:54:51 -05:00
parent 4668ae5850
commit a19395ee3c
4 changed files with 147 additions and 378 deletions
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13
apu/bapu/smp/core.cpp
View File

@ -13,12 +13,25 @@ void SMP::tick() {
#endif
}
void SMP::tick(unsigned clocks) {
timer0.tick(clocks);
timer1.tick(clocks);
timer2.tick(clocks);
clock += clocks;
dsp.clock += clocks;
}
void SMP::op_io() {
#if defined(CYCLE_ACCURATE)
tick();
#endif
}
void SMP::op_io(unsigned clocks) {
tick(clocks);
}
uint8 SMP::op_read(uint16 addr) {
#if defined(CYCLE_ACCURATE)
tick();

420
apu/bapu/smp/core/opcycle_misc.cpp
View File

@ -1,188 +1,109 @@
case 0x00: {
switch(opcode_cycle++) {
case 1:
op_io();
opcode_cycle = 0;
break;
}
op_io();
opcode_cycle = 0;
break;
}
case 0xef: {
switch(opcode_cycle++) {
case 1:
op_io();
break;
case 2:
op_io();
regs.pc--;
opcode_cycle = 0;
break;
}
op_io(2);
regs.pc--;
opcode_cycle = 0;
break;
}
case 0xff: {
switch(opcode_cycle++) {
case 1:
op_io();
break;
case 2:
op_io();
regs.pc--;
opcode_cycle = 0;
break;
}
op_io(2);
regs.pc--;
opcode_cycle = 0;
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;
}
op_io(4);
regs.a = (regs.a >> 4) | (regs.a << 4);
regs.p.n = !!(regs.a & 0x80);
regs.p.z = (regs.a == 0);
opcode_cycle = 0;
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;
op_io(2);
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;
}
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;
op_io(2);
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;
}
case 0x60: {
switch(opcode_cycle++) {
case 1:
op_io();
regs.p.c = 0;
opcode_cycle = 0;
break;
}
op_io();
regs.p.c = 0;
opcode_cycle = 0;
break;
}
case 0x20: {
switch(opcode_cycle++) {
case 1:
op_io();
regs.p.p = 0;
opcode_cycle = 0;
break;
}
op_io();
regs.p.p = 0;
opcode_cycle = 0;
break;
}
case 0x80: {
switch(opcode_cycle++) {
case 1:
op_io();
regs.p.c = 1;
opcode_cycle = 0;
break;
}
op_io();
regs.p.c = 1;
opcode_cycle = 0;
break;
}
case 0x40: {
switch(opcode_cycle++) {
case 1:
op_io();
regs.p.p = 1;
opcode_cycle = 0;
break;
}
op_io();
regs.p.p = 1;
opcode_cycle = 0;
break;
}
case 0xe0: {
switch(opcode_cycle++) {
case 1:
op_io();
regs.p.v = 0;
regs.p.h = 0;
opcode_cycle = 0;
break;
}
op_io();
regs.p.v = 0;
regs.p.h = 0;
opcode_cycle = 0;
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;
}
op_io(2);
regs.p.c = !regs.p.c;
opcode_cycle = 0;
break;
}
case 0xa0: {
switch(opcode_cycle++) {
case 1:
op_io();
break;
case 2:
op_io();
regs.p.i = 1;
opcode_cycle = 0;
break;
}
op_io(2);
regs.p.i = 1;
opcode_cycle = 0;
break;
}
@ -473,224 +394,93 @@ case 0xf2: {
}
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;
}
op_io(2);
op_writestack(regs.a);
opcode_cycle = 0;
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;
}
op_io(2);
op_writestack(regs.x);
opcode_cycle = 0;
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;
}
op_io(2);
op_writestack(regs.y);
opcode_cycle = 0;
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;
}
op_io(2);
op_writestack(regs.p);
opcode_cycle = 0;
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;
}
op_io(2);
regs.a = op_readstack();
opcode_cycle = 0;
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;
}
op_io(2);
regs.x = op_readstack();
opcode_cycle = 0;
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;
}
op_io(2);
regs.y = op_readstack();
opcode_cycle = 0;
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;
}
op_io(2);
regs.p = op_readstack();
opcode_cycle = 0;
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;
}
op_io(8);
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;
}
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;
op_io(11);
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;
}

90
apu/bapu/smp/core/opcycle_rmw.cpp
View File

@ -1,99 +1,63 @@
case 0xbc: {
switch(opcode_cycle++) {
case 1:
op_io();
regs.a = op_inc(regs.a);
opcode_cycle = 0;
break;
}
op_io();
regs.a = op_inc(regs.a);
opcode_cycle = 0;
break;
}
case 0x3d: {
switch(opcode_cycle++) {
case 1:
op_io();
regs.x = op_inc(regs.x);
opcode_cycle = 0;
break;
}
op_io();
regs.x = op_inc(regs.x);
opcode_cycle = 0;
break;
}
case 0xfc: {
switch(opcode_cycle++) {
case 1:
op_io();
regs.y = op_inc(regs.y);
opcode_cycle = 0;
break;
}
op_io();
regs.y = op_inc(regs.y);
opcode_cycle = 0;
break;
}
case 0x9c: {
switch(opcode_cycle++) {
case 1:
op_io();
regs.a = op_dec(regs.a);
opcode_cycle = 0;
break;
}
op_io();
regs.a = op_dec(regs.a);
opcode_cycle = 0;
break;
}
case 0x1d: {
switch(opcode_cycle++) {
case 1:
op_io();
regs.x = op_dec(regs.x);
opcode_cycle = 0;
break;
}
op_io();
regs.x = op_dec(regs.x);
opcode_cycle = 0;
break;
}
case 0xdc: {
switch(opcode_cycle++) {
case 1:
op_io();
regs.y = op_dec(regs.y);
opcode_cycle = 0;
break;
}
op_io();
regs.y = op_dec(regs.y);
opcode_cycle = 0;
break;
}
case 0x1c: {
switch(opcode_cycle++) {
case 1:
op_io();
regs.a = op_asl(regs.a);
opcode_cycle = 0;
break;
}
op_io();
regs.a = op_asl(regs.a);
opcode_cycle = 0;
break;
}
case 0x5c: {
switch(opcode_cycle++) {
case 1:
op_io();
regs.a = op_lsr(regs.a);
opcode_cycle = 0;
break;
}
op_io();
regs.a = op_lsr(regs.a);
opcode_cycle = 0;
break;
}
case 0x3c: {
switch(opcode_cycle++) {
case 1:
op_io();
regs.a = op_rol(regs.a);
opcode_cycle = 0;
break;
}
op_io();
regs.a = op_rol(regs.a);
opcode_cycle = 0;
break;
}

2
apu/bapu/smp/smp.hpp
View File

@ -96,7 +96,9 @@ public:
Timer< 16> timer2;
inline void tick();
inline void tick(unsigned clocks);
alwaysinline void op_io();
alwaysinline void op_io(unsigned clocks);
debugvirtual alwaysinline uint8 op_read(uint16 addr);
debugvirtual alwaysinline void op_write(uint16 addr, uint8 data);
debugvirtual alwaysinline void op_step();