dingusppc/poweropcodes.cpp
dingusdev e091fedb38
Near-Midnight Update - July 18, 2019
- Added a check for NuBus Macs, providing a mirror to the ROM
- Very slightly optimized ROM accesses for instructions and reads
- Some slight OpenPIC fixes
- Removed unused variables and slightly improved code readability
- Changed readme + boot-up help to reflect on newly added debugger

More changes will be added soon.
2019-07-18 23:31:16 -07:00

796 lines
21 KiB
C++

//DingusPPC - Prototype 5bf2
//Written by divingkatae
//(c)2018-20 (theweirdo)
//Please ask for permission
//if you want to distribute this.
//(divingkatae#1017 on Discord)
// The Power-specific opcodes for the processor - ppcopcodes.cpp
// Any shared opcodes are in ppcopcodes.cpp
#include <iostream>
#include <array>
#include <stdio.h>
#include <stdexcept>
#include "ppcemumain.h"
#include "ppcmemory.h"
#include <cmath>
#include <limits>
void power_abs(){
ppc_grab_regsda();
if (ppc_result_a == 0x80000000){
ppc_result_d = ppc_result_a;
}
else{
ppc_result_d = ppc_result_a & 0x7FFFFFFF;
}
ppc_store_result_regd();
}
void power_absdot(){
ppc_grab_regsda();
if (ppc_result_a == 0x80000000){
ppc_result_d = ppc_result_a;
}
else{
ppc_result_d = ppc_result_a & 0x7FFFFFFF;
}
ppc_changecrf0(ppc_result_d);
ppc_store_result_regd();
}
void power_abso(){
ppc_grab_regsda();
if (ppc_result_a == 0x80000000){
ppc_result_d = ppc_result_a;
ppc_state.ppc_spr[1] |= 0x40000000;
}
else{
ppc_result_d = ppc_result_a & 0x7FFFFFFF;
}
ppc_store_result_regd();
}
void power_absodot(){
ppc_grab_regsda();
if (ppc_result_a == 0x80000000){
ppc_result_d = ppc_result_a;
ppc_state.ppc_spr[1] |= 0x40000000;
}
else{
ppc_result_d = ppc_result_a & 0x7FFFFFFF;
}
ppc_changecrf0(ppc_result_d);
ppc_store_result_regd();
}
void power_clcs(){
ppc_grab_regsda();
switch(reg_a){
case 12:
case 13:
case 14:
case 15:
ppc_result_d = 65535;
break;
default:
ppc_result_d = 0;
}
ppc_store_result_regd();
}
void power_clcsdot(){
switch(reg_a){
case 12:
case 13:
case 14:
case 15:
ppc_result_d = 65535;
break;
default:
ppc_result_d = 0;
}
ppc_changecrf0(ppc_result_d);
printf("Does RC do anything here? (TODO) \n");
ppc_store_result_regd();
}
void power_div(){
ppc_grab_regsdab();
ppc_result_d = (ppc_result_a | ppc_state.ppc_spr[0]) / ppc_result_b;
ppc_state.ppc_spr[0] = (ppc_result_a | ppc_state.ppc_spr[0]) % ppc_result_b;
ppc_store_result_regd();
}
void power_divdot(){
ppc_result_d = (ppc_result_a | ppc_state.ppc_spr[0]) / ppc_result_b;
ppc_state.ppc_spr[0] = (ppc_result_a | ppc_state.ppc_spr[0]) % ppc_result_b;
}
void power_divo(){
ppc_result_d = (ppc_result_a | ppc_state.ppc_spr[0]) / ppc_result_b;
ppc_state.ppc_spr[0] = (ppc_result_a | ppc_state.ppc_spr[0]) % ppc_result_b;
}
void power_divodot(){
ppc_result_d = (ppc_result_a | ppc_state.ppc_spr[0]) / ppc_result_b;
ppc_state.ppc_spr[0] = (ppc_result_a | ppc_state.ppc_spr[0]) % ppc_result_b;
}
void power_divs(){
ppc_grab_regsdab();
ppc_result_d = ppc_result_a / ppc_result_b;
ppc_state.ppc_spr[0] =(ppc_result_a % ppc_result_b);
ppc_store_result_regd();
}
void power_divsdot(){
ppc_result_d = ppc_result_a / ppc_result_b;
ppc_state.ppc_spr[0] =(ppc_result_a % ppc_result_b);
}
void power_divso(){
ppc_result_d = ppc_result_a / ppc_result_b;
ppc_state.ppc_spr[0] =(ppc_result_a % ppc_result_b);
}
void power_divsodot(){
ppc_result_d = ppc_result_a / ppc_result_b;
ppc_state.ppc_spr[0] =(ppc_result_a % ppc_result_b);
}
void power_doz(){
ppc_grab_regsdab();
if (((int32_t)ppc_result_a) > ((int32_t)ppc_result_b)){
ppc_result_d = 0;
}
else{
ppc_result_d = ~ppc_result_a + ppc_result_b + 1;
}
ppc_store_result_rega();
}
void power_dozdot(){
ppc_grab_regsdab();
if (((int32_t)ppc_result_a) > ((int32_t)ppc_result_b)){
ppc_result_d = 0;
}
else{
ppc_result_d = ~ppc_result_a + ppc_result_b + 1;
}
ppc_changecrf0(ppc_result_d);
ppc_store_result_rega();
}
void power_dozo(){
if (((int32_t)ppc_result_a) > ((int32_t)ppc_result_b)){
ppc_result_d = 0;
}
else{
ppc_result_d = ~ppc_result_a + ppc_result_b + 1;
}
}
void power_dozodot(){
if (((int32_t)ppc_result_a) > ((int32_t)ppc_result_b)){
ppc_result_d = 0;
}
else{
ppc_result_d = ~ppc_result_a + ppc_result_b + 1;
}
}
void power_dozi(){
ppc_grab_regsdab();
if (((int32_t)ppc_result_a) > simm){
ppc_result_d = 0;
}
else{
ppc_result_d = ~ppc_result_a + simm + 1;
}
ppc_store_result_rega();
}
void power_lscbx(){
ppc_grab_regsdab();
uint32_t bytes_copied = 0;
bool match_found = false;
uint32_t shift_amount = 0;
uint8_t byte_compared = (uint8_t)((ppc_state.ppc_spr[1] & 0xFF00) >> 8);
if ((ppc_state.ppc_spr[1] & 0x7f) == 0){
return;
}
uint32_t bytes_to_load = (ppc_state.ppc_spr[1] & 0x7f) + 1;
ppc_effective_address = (reg_a == 0)?ppc_result_b:ppc_result_a + ppc_result_b;
do{
ppc_effective_address++;
bytes_to_load--;
if (match_found == false){
switch(shift_amount){
case 0:
address_quickgrab_translate(ppc_effective_address, 1);
ppc_result_d = (ppc_result_d & 0x00FFFFFF) | (return_value << 24);
ppc_store_result_regd();
break;
case 1:
address_quickgrab_translate(ppc_effective_address, 1);
ppc_result_d = (ppc_result_d & 0xFF00FFFF) | (return_value << 16);
ppc_store_result_regd();
break;
case 2:
address_quickgrab_translate(ppc_effective_address, 1);
ppc_result_d = (ppc_result_d & 0xFFFF00FF) | (return_value << 8);
ppc_store_result_regd();
break;
case 3:
address_quickgrab_translate(ppc_effective_address, 1);
ppc_result_d = (ppc_result_d & 0xFFFFFF00) | return_value;
ppc_store_result_regd();
break;
}
bytes_copied++;
}
if (((uint8_t)return_value) == byte_compared){
break;
}
return_value = 0;
if (shift_amount == 3){
shift_amount = 0;
reg_d = (reg_d + 1) & 0x1F;
}
else{
shift_amount++;
}
}while (bytes_to_load > 0);
ppc_state.ppc_spr[1] = (ppc_state.ppc_spr[1] & 0xFFFFFF80) | bytes_copied;
ppc_store_result_regd();
}
void power_lscbxdot(){
printf("OOPS! Placeholder!!! \n");
}
void power_maskg(){
ppc_grab_regssab();
uint32_t mask_start = ppc_result_d & 31;
uint32_t mask_end = ppc_result_b & 31;
uint32_t insert_mask = 0;
if (mask_start < (mask_end + 1)){
for (uint32_t i = mask_start; i < mask_end; i++){
insert_mask |= (0x80000000 >> i);
}
}
else if (mask_start == (mask_end + 1)){
insert_mask = 0xFFFFFFFF;
}
else{
insert_mask = 0xFFFFFFFF;
for (uint32_t i = (mask_end + 1); i < (mask_start - 1); i++){
insert_mask &= (~(0x80000000 >> i));
}
}
ppc_result_a = insert_mask;
ppc_store_result_rega();
}
void power_maskgdot(){
ppc_grab_regssab();
uint32_t mask_start = ppc_result_d & 31;
uint32_t mask_end = ppc_result_b & 31;
uint32_t insert_mask = 0;
if (mask_start < (mask_end + 1)){
for (uint32_t i = mask_start; i < mask_end; i++){
insert_mask |= (0x80000000 >> i);
}
}
else if (mask_start == (mask_end + 1)){
insert_mask = 0xFFFFFFFF;
}
else{
insert_mask = 0xFFFFFFFF;
for (uint32_t i = (mask_end + 1); i < (mask_start - 1); i++){
insert_mask &= (~(0x80000000 >> i));
}
}
ppc_result_a = insert_mask;
ppc_store_result_rega();
}
void power_maskir(){
ppc_grab_regssab();
uint32_t mask_insert = ppc_result_a;
uint32_t insert_rot = 0x80000000;
do{
if (ppc_result_b & insert_rot){
mask_insert &= ~insert_rot;
mask_insert |= (ppc_result_d & insert_rot);
}
insert_rot = insert_rot>> 1;
}while(insert_rot > 0);
ppc_result_a = (ppc_result_d & ppc_result_b);
ppc_store_result_rega();
}
void power_maskirdot(){
ppc_grab_regssab();
uint32_t mask_insert = ppc_result_a;
uint32_t insert_rot = 0x80000000;
do{
if (ppc_result_b & insert_rot){
mask_insert &= ~insert_rot;
mask_insert |= (ppc_result_d & insert_rot);
}
insert_rot = insert_rot>> 1;
}while(insert_rot > 0);
ppc_result_a = (ppc_result_d & ppc_result_b);
ppc_changecrf0(ppc_result_a);
ppc_store_result_rega();
}
void power_mul(){
ppc_grab_regsdab();
uint64_t product;
product = ((uint64_t)ppc_result_a) * ((uint64_t)ppc_result_b);
ppc_result_d = ((uint32_t)(product >> 32));
ppc_state.ppc_spr[0] = ((uint32_t)(product));
ppc_store_result_regd();
}
void power_muldot(){
ppc_grab_regsdab();
uint64_t product;
product = ((uint64_t)ppc_result_a) * ((uint64_t)ppc_result_b);
ppc_result_d = ((uint32_t)(product >> 32));
ppc_state.ppc_spr[0] = ((uint32_t)(product));
ppc_changecrf0(ppc_result_d);
ppc_store_result_regd();
}
void power_mulo(){
uint64_t product;
product = ((uint64_t)ppc_result_a) * ((uint64_t)ppc_result_b);
ppc_result_d = ((uint32_t)(product >> 32));
ppc_state.ppc_spr[0] = ((uint32_t)(product));
}
void power_mulodot(){
uint64_t product;
product = ((uint64_t)ppc_result_a) * ((uint64_t)ppc_result_b);
ppc_result_d = ((uint32_t)(product >> 32));
ppc_state.ppc_spr[0] = ((uint32_t)(product));
}
void power_nabs(){
ppc_grab_regsda();
ppc_result_d = (0x80000000 | ppc_result_a);
ppc_store_result_regd();
}
void power_nabsdot(){
ppc_result_d = (0x80000000 | ppc_result_a);
}
void power_nabso(){
ppc_result_d = (0x80000000 | ppc_result_a);
}
void power_nabsodot(){
ppc_result_d = (0x80000000 | ppc_result_a);
}
void power_rlmi(){
ppc_grab_regssab();
rot_mb = (ppc_cur_instruction >> 6) & 31;
rot_me = (ppc_cur_instruction >> 1) & 31;
uint32_t rot_amt = ppc_result_b & 31;
uint32_t insert_mask = 0;
if (rot_mb < (rot_me + 1)){
for (uint32_t i = rot_mb; i < rot_me; i++){
insert_mask |= (0x80000000 >> i);
}
}
else if (rot_mb == (rot_me + 1)){
insert_mask = 0xFFFFFFFF;
}
else{
insert_mask = 0xFFFFFFFF;
for (uint32_t i = (rot_me + 1); i < (rot_mb - 1); i++){
insert_mask &= (~(0x80000000 >> i));
}
}
uint32_t step2 = (ppc_result_d << rot_amt) | (ppc_result_d >> rot_amt);
ppc_result_a = step2 & insert_mask;
ppc_store_result_rega();
}
void power_rrib(){
ppc_grab_regssab();
if (ppc_result_d & 0x80000000){
ppc_result_a |= (0x80000000 >> ppc_result_b);
}
else{
ppc_result_a &= ~(0x80000000 >> ppc_result_b);
}
ppc_store_result_rega();
}
void power_rribdot(){
ppc_grab_regssab();
if (ppc_result_d & 0x80000000){
ppc_result_a |= (0x80000000 >> ppc_result_b);
}
else{
ppc_result_a &= ~(0x80000000 >> ppc_result_b);
}
ppc_changecrf0(ppc_result_a);
ppc_store_result_rega();
}
void power_sle(){
ppc_grab_regssa();
uint32_t insert_mask = 0;
uint32_t rot_amt = ppc_result_b & 31;
for (uint32_t i = 31; i > rot_amt; i--){
insert_mask |= (1 << i);
}
uint32_t insert_final = ((ppc_result_d << rot_amt) | (ppc_result_d >> (32 - rot_amt)));
ppc_state.ppc_spr[0] = insert_final & insert_mask;
ppc_result_a = insert_final & insert_mask;
ppc_store_result_rega();
}
void power_sledot(){
ppc_grab_regssa();
uint32_t insert_mask = 0;
uint32_t rot_amt = ppc_result_b & 31;
for (uint32_t i = 31; i > rot_amt; i--){
insert_mask |= (1 << i);
}
uint32_t insert_final = ((ppc_result_d << rot_amt) | (ppc_result_d >> (32 - rot_amt)));
ppc_state.ppc_spr[0] = insert_final & insert_mask;
ppc_result_a = insert_final & insert_mask;
ppc_changecrf0(ppc_result_a);
ppc_store_result_rega();
}
void power_sleq(){
ppc_grab_regssa();
uint32_t insert_mask = 0;
uint32_t rot_amt = ppc_result_b & 31;
for (uint32_t i = 31; i > rot_amt; i--){
insert_mask |= (1 << i);
}
uint32_t insert_start= ((ppc_result_d << rot_amt) | (ppc_result_d >> (rot_amt - 31)));
uint32_t insert_end = ppc_state.ppc_spr[0];
for (int i = 0; i < 32; i++){
if (insert_mask & (1 << i)){
insert_end &= ~(1 << i);
insert_end |= (insert_start & (1 << i));
}
}
ppc_result_a = insert_end;
ppc_state.ppc_spr[0] = insert_start;
ppc_store_result_rega();
}
void power_sleqdot(){
ppc_grab_regssa();
uint32_t insert_mask = 0;
uint32_t rot_amt = ppc_result_b & 31;
for (uint32_t i = 31; i > rot_amt; i--){
insert_mask |= (1 << i);
}
uint32_t insert_start= ((ppc_result_d << rot_amt) | (ppc_result_d >> (rot_amt - 31)));
uint32_t insert_end = ppc_state.ppc_spr[0];
for (int i = 0; i < 32; i++){
if (insert_mask & (1 << i)){
insert_end &= ~(1 << i);
insert_end |= (insert_start & (1 << i));
}
}
ppc_result_a = insert_end;
ppc_state.ppc_spr[0] = insert_start;
ppc_changecrf0(ppc_result_a);
ppc_store_result_rega();
}
void power_sliq(){
ppc_grab_regssa();
uint32_t insert_mask = 0;
rot_sh = (ppc_cur_instruction >> 11) & 31;
for (uint32_t i = 31; i > rot_sh; i--){
insert_mask |= (1 << i);
}
uint32_t insert_start= ((ppc_result_d << rot_sh) | (ppc_result_d >> (rot_sh - 31)));
uint32_t insert_end = ppc_state.ppc_spr[0];
for (int i = 0; i < 32; i++){
if (insert_mask & (1 << i)){
insert_end &= ~(1 << i);
insert_end |= (insert_start & (1 << i));
}
}
ppc_result_a = insert_end & insert_mask;
ppc_state.ppc_spr[0] = insert_start;
ppc_store_result_rega();
}
void power_sliqdot(){
ppc_grab_regssa();
uint32_t insert_mask = 0;
rot_sh = (ppc_cur_instruction >> 11) & 31;
for (uint32_t i = 31; i > rot_sh; i--){
insert_mask |= (1 << i);
}
uint32_t insert_start= ((ppc_result_d << rot_sh) | (ppc_result_d >> (rot_sh - 31)));
uint32_t insert_end = ppc_state.ppc_spr[0];
for (int i = 0; i < 32; i++){
if (insert_mask & (1 << i)){
insert_end &= ~(1 << i);
insert_end |= (insert_start & (1 << i));
}
}
ppc_result_a = insert_end & insert_mask;
ppc_state.ppc_spr[0] = insert_start;
ppc_changecrf0(ppc_result_a);
ppc_store_result_rega();
}
void power_slliq(){
ppc_grab_regssa();
uint32_t insert_mask = 0;
rot_sh = (ppc_cur_instruction >> 11) & 31;
for (uint32_t i = 31; i > rot_sh; i--){
insert_mask |= (1 << i);
}
uint32_t insert_start= ((ppc_result_d << rot_sh) | (ppc_result_d >> (32 - rot_sh)));
uint32_t insert_end = ppc_state.ppc_spr[0];
for (int i = 0; i < 32; i++){
if (insert_mask & (1 << i)){
insert_end &= ~(1 << i);
insert_end |= (insert_start & (1 << i));
}
}
ppc_result_a = insert_end;
ppc_state.ppc_spr[0] = insert_start;
ppc_store_result_rega();
}
void power_slliqdot(){
ppc_grab_regssa();
uint32_t insert_mask = 0;
rot_sh = (ppc_cur_instruction >> 11) & 31;
for (uint32_t i = 31; i > rot_sh; i--){
insert_mask |= (1 << i);
}
uint32_t insert_start= ((ppc_result_d << rot_sh) | (ppc_result_d >> (32 - rot_sh)));
uint32_t insert_end = ppc_state.ppc_spr[0];
for (int i = 0; i < 32; i++){
if (insert_mask & (1 << i)){
insert_end &= ~(1 << i);
insert_end |= (insert_start & (1 << i));
}
}
ppc_result_a = insert_end;
ppc_state.ppc_spr[0] = insert_start;
ppc_changecrf0(ppc_result_a);
ppc_store_result_rega();
}
void power_sllq(){
printf("OOPS! Placeholder!!! \n");
}
void power_sllqdot(){
printf("OOPS! Placeholder!!! \n");
}
void power_slq(){
printf("OOPS! Placeholder!!! \n");
}
void power_slqdot(){
printf("OOPS! Placeholder!!! \n");
}
void power_sraiq(){
printf("OOPS! Placeholder!!! \n");
}
void power_sraiqdot(){
printf("OOPS! Placeholder!!! \n");
}
void power_sraq(){
printf("OOPS! Placeholder!!! \n");
}
void power_sraqdot(){
printf("OOPS! Placeholder!!! \n");
}
void power_sre(){
ppc_grab_regssa();
uint32_t insert_mask = 0;
uint32_t rot_amt = ppc_result_b & 31;
for (uint32_t i = 31; i > rot_amt; i--){
insert_mask |= (1 << i);
}
uint32_t insert_final = ((ppc_result_d >> rot_amt) | (ppc_result_d << (32 - rot_amt)));
ppc_state.ppc_spr[0] = insert_final & insert_mask;
ppc_result_a = insert_final;
ppc_store_result_rega();
}
void power_sredot(){
ppc_grab_regssa();
uint32_t insert_mask = 0;
uint32_t rot_amt = ppc_result_b & 31;
for (uint32_t i = 31; i > rot_amt; i--){
insert_mask |= (1 << i);
}
uint32_t insert_final = ((ppc_result_d >> rot_amt) | (ppc_result_d << (32 - rot_amt)));
ppc_state.ppc_spr[0] = insert_final & insert_mask;
ppc_result_a = insert_final;
ppc_changecrf0(ppc_result_a);
ppc_store_result_rega();
}
void power_srea(){
printf("OOPS! Placeholder!!! \n");
}
void power_sreadot(){
printf("OOPS! Placeholder!!! \n");
}
void power_sreq(){
ppc_grab_regssa();
uint32_t insert_mask = 0;
rot_sh = ppc_result_b & 31;
for (uint32_t i = 31; i > rot_sh; i--){
insert_mask |= (1 << i);
}
uint32_t insert_start= ((ppc_result_d >> rot_sh) | (ppc_result_d << (32 - rot_sh)));
uint32_t insert_end = ppc_state.ppc_spr[0];
for (int i = 0; i < 32; i++){
if (insert_mask & (1 << i)){
insert_end &= ~(1 << i);
insert_end |= (insert_start & (1 << i));
}
}
ppc_result_a = insert_end;
ppc_state.ppc_spr[0] = insert_start;
ppc_store_result_rega();
}
void power_sreqdot(){
ppc_grab_regssa();
uint32_t insert_mask = 0;
rot_sh = ppc_result_b & 31;
for (uint32_t i = 31; i > rot_sh; i--){
insert_mask |= (1 << i);
}
uint32_t insert_start= ((ppc_result_d >> rot_sh) | (ppc_result_d << (32 - rot_sh)));
uint32_t insert_end = ppc_state.ppc_spr[0];
for (int i = 0; i < 32; i++){
if (insert_mask & (1 << i)){
insert_end &= ~(1 << i);
insert_end |= (insert_start & (1 << i));
}
}
ppc_result_a = insert_end;
ppc_state.ppc_spr[0] = insert_start;
ppc_changecrf0(ppc_result_a);
ppc_store_result_rega();
}
void power_sriq(){
ppc_grab_regssa();
uint32_t insert_mask = 0;
rot_sh = (ppc_cur_instruction >> 11) & 31;
for (uint32_t i = 31; i > rot_sh; i--){
insert_mask |= (1 << i);
}
uint32_t insert_start= ((ppc_result_d >> rot_sh) | (ppc_result_d << (32 - rot_sh)));
uint32_t insert_end = ppc_state.ppc_spr[0];
for (int i = 0; i < 32; i++){
if (insert_mask & (1 << i)){
insert_end &= ~(1 << i);
insert_end |= (insert_start & (1 << i));
}
}
ppc_result_a = insert_end;
ppc_state.ppc_spr[0] = insert_start;
ppc_store_result_rega();
}
void power_sriqdot(){
ppc_grab_regssa();
uint32_t insert_mask = 0;
rot_sh = (ppc_cur_instruction >> 11) & 31;
for (uint32_t i = 31; i > rot_sh; i--){
insert_mask |= (1 << i);
}
uint32_t insert_start= ((ppc_result_d >> rot_sh) | (ppc_result_d << (32 - rot_sh)));
uint32_t insert_end = ppc_state.ppc_spr[0];
for (int i = 0; i < 32; i++){
if (insert_mask & (1 << i)){
insert_end &= ~(1 << i);
insert_end |= (insert_start & (1 << i));
}
}
ppc_result_a = insert_end;
ppc_state.ppc_spr[0] = insert_start;
ppc_changecrf0(ppc_result_a);
ppc_store_result_rega();
}
void power_srliq(){
printf("OOPS! Placeholder!!! \n");
}
void power_srliqdot(){
printf("OOPS! Placeholder!!! \n");
}
void power_srlq(){
printf("OOPS! Placeholder!!! \n");
}
void power_srlqdot(){
printf("OOPS! Placeholder!!! \n");
}
void power_srq(){
printf("OOPS! Placeholder!!! \n");
}
void power_srqdot(){
printf("OOPS! Placeholder!!! \n");
}