/*
DingusPPC - The Experimental PowerPC Macintosh emulator
Copyright (C) 2018-20 divingkatae and maximum
                      (theweirdo)     spatium

(Contact divingkatae#1017 or powermax#2286 on Discord for more info)

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/

// General opcodes for the processor - ppcopcodes.cpp

#include "ppcemu.h"
#include "ppcmmu.h"
#include <array>
#include <cinttypes>
#include <cstring>
#include <iostream>
#include <stdexcept>
#include <stdio.h>
#include <stdlib.h>
#include <thirdparty/loguru/loguru.hpp>
#include <thread>

uint32_t crf_d;
uint32_t crf_s;
uint32_t reg_s;
uint32_t reg_d;
uint32_t reg_a;
uint32_t reg_b;
uint32_t reg_c;    // used only for floating point multiplication operations
uint32_t xercon;
uint32_t cmp_c;
uint32_t crm;
uint32_t uimm;
uint32_t grab_sr;
uint32_t grab_inb;    // This is for grabbing the number of immediate bytes for loading and storing
uint32_t ppc_to;
int32_t simm;
int32_t adr_li;

// Used for GP calcs
uint32_t ppc_result_a = 0;
uint32_t ppc_result_b = 0;
uint32_t ppc_result_c = 0;
uint32_t ppc_result_d = 0;

uint32_t strwrd_replace_value;

/**
Extract the registers desired and the values of the registers
This also takes the MSR into account, mainly to determine
what endian the numbers are to be stored in.
**/

// Storage and register retrieval functions for the integer functions.
void ppc_store_result_regd() {
    ppc_state.gpr[reg_d] = ppc_result_d;
}

void ppc_store_result_rega() {
    ppc_state.gpr[reg_a] = ppc_result_a;
}

void ppc_grab_regsdasimm() {
    reg_d        = (ppc_cur_instruction >> 21) & 31;
    reg_a        = (ppc_cur_instruction >> 16) & 31;
    simm         = (int32_t)((int16_t)((ppc_cur_instruction)&65535));
    ppc_result_a = ppc_state.gpr[reg_a];
}

void ppc_grab_regsdauimm() {
    reg_d        = (ppc_cur_instruction >> 21) & 31;
    reg_a        = (ppc_cur_instruction >> 16) & 31;
    uimm         = (uint32_t)((uint16_t)((ppc_cur_instruction)&65535));
    ppc_result_a = ppc_state.gpr[reg_a];
}

void ppc_grab_regsasimm() {
    reg_a        = (ppc_cur_instruction >> 16) & 31;
    simm         = (int32_t)((int16_t)(ppc_cur_instruction & 65535));
    ppc_result_a = ppc_state.gpr[reg_a];
}

void ppc_grab_regssauimm() {
    reg_s        = (ppc_cur_instruction >> 21) & 31;
    reg_a        = (ppc_cur_instruction >> 16) & 31;
    uimm         = (uint32_t)((uint16_t)((ppc_cur_instruction)&65535));
    ppc_result_d = ppc_state.gpr[reg_s];
    ppc_result_a = ppc_state.gpr[reg_a];
}

void ppc_grab_regsdab() {
    reg_d        = (ppc_cur_instruction >> 21) & 31;
    reg_a        = (ppc_cur_instruction >> 16) & 31;
    reg_b        = (ppc_cur_instruction >> 11) & 31;
    ppc_result_a = ppc_state.gpr[reg_a];
    ppc_result_b = ppc_state.gpr[reg_b];
}

void ppc_grab_regssab() {
    reg_s        = (ppc_cur_instruction >> 21) & 31;
    reg_a        = (ppc_cur_instruction >> 16) & 31;
    reg_b        = (ppc_cur_instruction >> 11) & 31;
    ppc_result_d = ppc_state.gpr[reg_s];
    ppc_result_a = ppc_state.gpr[reg_a];
    ppc_result_b = ppc_state.gpr[reg_b];
}

void ppc_grab_regssa() {
    reg_s        = (ppc_cur_instruction >> 21) & 31;
    reg_a        = (ppc_cur_instruction >> 16) & 31;
    ppc_result_d = ppc_state.gpr[reg_s];
    ppc_result_a = ppc_state.gpr[reg_a];
}

void ppc_grab_regssb() {
    reg_s        = (ppc_cur_instruction >> 21) & 31;
    reg_b        = (ppc_cur_instruction >> 11) & 31;
    ppc_result_d = ppc_state.gpr[reg_s];
    ppc_result_b = ppc_state.gpr[reg_b];
}

void ppc_grab_regsda() {
    reg_d        = (ppc_cur_instruction >> 21) & 31;
    reg_a        = (ppc_cur_instruction >> 16) & 31;
    ppc_result_a = ppc_state.gpr[reg_a];
}

void ppc_grab_regsdb() {
    reg_d        = (ppc_cur_instruction >> 21) & 31;
    reg_b        = (ppc_cur_instruction >> 11) & 31;
    ppc_result_b = ppc_state.gpr[reg_b];
}


// Affects CR Field 0 - For integer operations
void ppc_changecrf0(uint32_t set_result) {
    ppc_state.cr &= 0x0FFFFFFFUL;

    if (set_result == 0) {
        ppc_state.cr |= 0x20000000UL;
    } else {
        if (set_result & 0x80000000) {
            ppc_state.cr |= 0x80000000UL;
        } else {
            ppc_state.cr |= 0x40000000UL;
        }
    }

    /* copy XER[SO] into CR0[SO]. */
    ppc_state.cr |= (ppc_state.spr[SPR::XER] >> 3) & 0x10000000UL;
}

// Affects the XER register's Carry Bit
inline void ppc_carry(uint32_t a, uint32_t b) {
    if (b < a) {
        ppc_state.spr[SPR::XER] |= 0x20000000UL;
    } else {
        ppc_state.spr[SPR::XER] &= 0xDFFFFFFFUL;
    }
}

inline void ppc_carry_sub(uint32_t a, uint32_t b) {
    if (b >= a) {
        ppc_state.spr[SPR::XER] |= 0x20000000UL;
    } else {
        ppc_state.spr[SPR::XER] &= 0xDFFFFFFFUL;
    }
}

// Affects the XER register's SO and OV Bits

inline void ppc_setsoov(uint32_t a, uint32_t b, uint32_t d) {
    if ((a ^ b) & (a ^ d) & 0x80000000UL) {
        ppc_state.spr[SPR::XER] |= 0xC0000000UL;
    } else {
        ppc_state.spr[SPR::XER] &= 0xBFFFFFFFUL;
    }
}

/**
The core functionality of this PPC emulation is within all of these void functions.
This is where the opcode tables in the ppcemumain.h come into play - reducing the number of
comparisons needed. This means loads of functions, but less CPU cycles needed to determine the
function (theoretically).
**/

void ppc_addi() {
    ppc_grab_regsdasimm();
    ppc_result_d = (reg_a == 0) ? simm : (ppc_result_a + simm);
    ppc_store_result_regd();
}

void ppc_addic() {
    ppc_grab_regsdasimm();
    ppc_result_d = (ppc_result_a + simm);
    ppc_carry(ppc_result_a, ppc_result_d);
    ppc_store_result_regd();
}

void ppc_addicdot() {
    ppc_grab_regsdasimm();
    ppc_result_d = (ppc_result_a + simm);
    ppc_changecrf0(ppc_result_d);
    ppc_carry(ppc_result_a, ppc_result_d);
    ppc_store_result_regd();
}

void ppc_addis() {
    ppc_grab_regsdasimm();
    ppc_result_d = (reg_a == 0) ? (simm << 16) : (ppc_result_a + (simm << 16));
    ppc_store_result_regd();
}

void ppc_add() {
    ppc_grab_regsdab();
    ppc_result_d = ppc_result_a + ppc_result_b;
    ppc_store_result_regd();
}

void ppc_adddot() {
    ppc_grab_regsdab();
    ppc_result_d = ppc_result_a + ppc_result_b;
    ppc_changecrf0(ppc_result_d);
    ppc_store_result_regd();
}

// addo + addodot
void ppc_addo() {
    ppc_grab_regsdab();
    ppc_result_d = ppc_result_a + ppc_result_b;
    ppc_setsoov(ppc_result_a, ~ppc_result_b, ppc_result_d);
    ppc_store_result_regd();
}

void ppc_addodot() {
    ppc_grab_regsdab();
    ppc_result_d = ppc_result_a + ppc_result_b;
    ppc_setsoov(ppc_result_a, ~ppc_result_b, ppc_result_d);
    ppc_changecrf0(ppc_result_d);
    ppc_store_result_regd();
}

void ppc_addc() {
    ppc_grab_regsdab();
    ppc_result_d = ppc_result_a + ppc_result_b;
    ppc_carry(ppc_result_a, ppc_result_d);
    ppc_store_result_regd();
}

void ppc_addcdot() {
    ppc_grab_regsdab();
    ppc_result_d = ppc_result_a + ppc_result_b;
    ppc_carry(ppc_result_a, ppc_result_d);
    ppc_changecrf0(ppc_result_d);
    ppc_store_result_regd();
}

void ppc_addco() {
    ppc_grab_regsdab();
    ppc_result_d = ppc_result_a + ppc_result_b;
    ppc_setsoov(ppc_result_a, ~ppc_result_b, ppc_result_d);
    ppc_carry(ppc_result_a, ppc_result_d);
    ppc_store_result_regd();
}

void ppc_addcodot() {
    ppc_grab_regsdab();
    ppc_result_d = ppc_result_a + ppc_result_b;
    ppc_setsoov(ppc_result_a, ~ppc_result_b, ppc_result_d);
    ppc_carry(ppc_result_a, ppc_result_d);
    ppc_changecrf0(ppc_result_d);
    ppc_store_result_regd();
}

void ppc_adde() {
    ppc_grab_regsdab();
    uint32_t xer_ca = !!(ppc_state.spr[SPR::XER] & 0x20000000);
    ppc_result_d    = ppc_result_a + ppc_result_b + xer_ca;
    if ((ppc_result_d < ppc_result_a) || (xer_ca && (ppc_result_d == ppc_result_a))) {
        ppc_state.spr[SPR::XER] |= 0x20000000UL;
    } else {
        ppc_state.spr[SPR::XER] &= 0xDFFFFFFFUL;
    }
    ppc_store_result_regd();
}

void ppc_addedot() {
    ppc_grab_regsdab();
    uint32_t xer_ca = !!(ppc_state.spr[SPR::XER] & 0x20000000);
    ppc_result_d    = ppc_result_a + ppc_result_b + xer_ca;
    if ((ppc_result_d < ppc_result_a) || (xer_ca && (ppc_result_d == ppc_result_a))) {
        ppc_state.spr[SPR::XER] |= 0x20000000UL;
    } else {
        ppc_state.spr[SPR::XER] &= 0xDFFFFFFFUL;
    }
    ppc_changecrf0(ppc_result_d);
    ppc_store_result_regd();
}

void ppc_addeo() {
    ppc_grab_regsdab();
    uint32_t xer_ca = !!(ppc_state.spr[SPR::XER] & 0x20000000);
    ppc_result_d    = ppc_result_a + ppc_result_b + xer_ca;
    if ((ppc_result_d < ppc_result_a) || (xer_ca && (ppc_result_d == ppc_result_a))) {
        ppc_state.spr[SPR::XER] |= 0x20000000UL;
    } else {
        ppc_state.spr[SPR::XER] &= 0xDFFFFFFFUL;
    }
    ppc_setsoov(ppc_result_a, ~ppc_result_b, ppc_result_d);
    ppc_store_result_regd();
}

void ppc_addeodot() {
    ppc_grab_regsdab();
    uint32_t xer_ca = !!(ppc_state.spr[SPR::XER] & 0x20000000);
    ppc_result_d    = ppc_result_a + ppc_result_b + xer_ca;
    if ((ppc_result_d < ppc_result_a) || (xer_ca && (ppc_result_d == ppc_result_a))) {
        ppc_state.spr[SPR::XER] |= 0x20000000UL;
    } else {
        ppc_state.spr[SPR::XER] &= 0xDFFFFFFFUL;
    }
    ppc_setsoov(ppc_result_a, ~ppc_result_b, ppc_result_d);
    ppc_changecrf0(ppc_result_d);
    ppc_store_result_regd();
}

void ppc_addme() {
    ppc_grab_regsda();
    uint32_t xer_ca = !!(ppc_state.spr[SPR::XER] & 0x20000000);
    ppc_result_d    = ppc_result_a + xer_ca - 1;
    if (((xer_ca - 1) < 0xFFFFFFFFUL) | (ppc_result_d < ppc_result_a)) {
        ppc_state.spr[SPR::XER] |= 0x20000000UL;
    } else {
        ppc_state.spr[SPR::XER] &= 0xDFFFFFFFUL;
    }
    ppc_store_result_regd();
}

void ppc_addmedot() {
    ppc_grab_regsda();
    uint32_t xer_ca = !!(ppc_state.spr[SPR::XER] & 0x20000000);
    ppc_result_d    = ppc_result_a + xer_ca - 1;
    if (((xer_ca - 1) < 0xFFFFFFFFUL) | (ppc_result_d < ppc_result_a)) {
        ppc_state.spr[SPR::XER] |= 0x20000000UL;
    } else {
        ppc_state.spr[SPR::XER] &= 0xDFFFFFFFUL;
    }
    ppc_changecrf0(ppc_result_d);
    ppc_store_result_regd();
}

void ppc_addmeo() {
    ppc_grab_regsda();
    uint32_t xer_ca = !!(ppc_state.spr[SPR::XER] & 0x20000000);
    ppc_result_d    = ppc_result_a + xer_ca - 1;
    ppc_setsoov(ppc_result_a, 0, ppc_result_d);
    if (((xer_ca - 1) < 0xFFFFFFFFUL) | (ppc_result_d < ppc_result_a)) {
        ppc_state.spr[SPR::XER] |= 0x20000000UL;
    } else {
        ppc_state.spr[SPR::XER] &= 0xDFFFFFFFUL;
    }
    ppc_store_result_regd();
}

void ppc_addmeodot() {
    ppc_grab_regsda();
    uint32_t xer_ca = !!(ppc_state.spr[SPR::XER] & 0x20000000);
    ppc_result_d    = ppc_result_a + xer_ca - 1;
    ppc_setsoov(ppc_result_a, 0, ppc_result_d);
    ppc_changecrf0(ppc_result_d);
    if (((xer_ca - 1) < 0xFFFFFFFFUL) | (ppc_result_d < ppc_result_a)) {
        ppc_state.spr[SPR::XER] |= 0x20000000UL;
    } else {
        ppc_state.spr[SPR::XER] &= 0xDFFFFFFFUL;
    }
    ppc_store_result_regd();
}

void ppc_addze() {
    ppc_grab_regsda();
    uint32_t grab_xer = !!(ppc_state.spr[SPR::XER] & 0x20000000);
    ppc_result_d      = ppc_result_a + grab_xer;
    if (ppc_result_d < ppc_result_a) {
        ppc_state.spr[SPR::XER] |= 0x20000000UL;
    } else {
        ppc_state.spr[SPR::XER] &= 0xDFFFFFFFUL;
    }
    ppc_store_result_regd();
}

void ppc_addzedot() {
    ppc_grab_regsda();
    uint32_t grab_xer = !!(ppc_state.spr[SPR::XER] & 0x20000000);
    ppc_result_d      = ppc_result_a + grab_xer;
    if (ppc_result_d < ppc_result_a) {
        ppc_state.spr[SPR::XER] |= 0x20000000UL;
    } else {
        ppc_state.spr[SPR::XER] &= 0xDFFFFFFFUL;
    }
    ppc_changecrf0(ppc_result_d);
    ppc_store_result_regd();
}

void ppc_addzeo() {
    ppc_grab_regsda();
    uint32_t grab_xer = !!(ppc_state.spr[SPR::XER] & 0x20000000);
    ppc_result_d      = ppc_result_a + grab_xer;
    ppc_setsoov(ppc_result_a, 0xFFFFFFFFUL, ppc_result_d);
    if (ppc_result_d < ppc_result_a) {
        ppc_state.spr[SPR::XER] |= 0x20000000UL;
    } else {
        ppc_state.spr[SPR::XER] &= 0xDFFFFFFFUL;
    }
    ppc_store_result_regd();
}

void ppc_addzeodot() {
    ppc_grab_regsda();
    uint32_t grab_xer = !!(ppc_state.spr[SPR::XER] & 0x20000000);
    ppc_result_d      = ppc_result_a + grab_xer;
    ppc_setsoov(ppc_result_a, 0xFFFFFFFFUL, ppc_result_d);
    if (ppc_result_d < ppc_result_a) {
        ppc_state.spr[SPR::XER] |= 0x20000000UL;
    } else {
        ppc_state.spr[SPR::XER] &= 0xDFFFFFFFUL;
    }
    ppc_changecrf0(ppc_result_d);
    ppc_store_result_regd();
}

void ppc_subf() {
    ppc_grab_regsdab();
    ppc_result_d = ppc_result_b - ppc_result_a;
    ppc_store_result_regd();
}

void ppc_subfdot() {
    ppc_grab_regsdab();
    ppc_result_d = ppc_result_b - ppc_result_a;
    ppc_changecrf0(ppc_result_d);
    ppc_store_result_regd();
}

void ppc_subfo() {
    ppc_grab_regsdab();
    ppc_result_d = ppc_result_b - ppc_result_a;
    ppc_setsoov(ppc_result_b, ppc_result_a, ppc_result_d);
    ppc_store_result_regd();
}

void ppc_subfodot() {
    ppc_grab_regsdab();
    ppc_result_d = ppc_result_b - ppc_result_a;
    ppc_setsoov(ppc_result_b, ppc_result_a, ppc_result_d);
    ppc_changecrf0(ppc_result_d);
    ppc_store_result_regd();
}

void ppc_subfc() {
    ppc_grab_regsdab();
    ppc_result_d = ppc_result_b - ppc_result_a;
    ppc_carry_sub(ppc_result_a, ppc_result_b);
    ppc_store_result_regd();
}

void ppc_subfcdot() {
    ppc_grab_regsdab();
    ppc_result_d = ppc_result_b - ppc_result_a;
    ppc_carry_sub(ppc_result_a, ppc_result_b);
    ppc_changecrf0(ppc_result_d);
    ppc_store_result_regd();
}

void ppc_subfco() {
    ppc_grab_regsdab();
    ppc_result_d = ppc_result_b - ppc_result_a;
    ppc_setsoov(ppc_result_b, ppc_result_a, ppc_result_d);
    ppc_carry_sub(ppc_result_a, ppc_result_b);
    ppc_store_result_regd();
}

void ppc_subfcodot() {
    ppc_grab_regsdab();
    ppc_result_d = ppc_result_b - ppc_result_a;
    ppc_setsoov(ppc_result_b, ppc_result_a, ppc_result_d);
    ppc_carry_sub(ppc_result_a, ppc_result_b);
    ppc_changecrf0(ppc_result_d);
    ppc_store_result_regd();
}

void ppc_subfic() {
    ppc_grab_regsdasimm();
    ppc_result_d = simm - ppc_result_a;
    ppc_carry(~ppc_result_a, ppc_result_d);
    ppc_store_result_regd();
}

void ppc_subfe() {
    ppc_grab_regsdab();
    uint32_t grab_xer = !!(ppc_state.spr[SPR::XER] & 0x20000000);
    ppc_result_d      = ~ppc_result_a + ppc_result_b + grab_xer;
    ppc_carry(~ppc_result_a, ppc_result_d);
    ppc_store_result_regd();
}

void ppc_subfedot() {
    ppc_grab_regsdab();
    uint32_t grab_xer = !!(ppc_state.spr[SPR::XER] & 0x20000000);
    ppc_result_d      = ~ppc_result_a + ppc_result_b + grab_xer;
    ppc_carry(~ppc_result_a, ppc_result_d);
    ppc_changecrf0(ppc_result_d);
    ppc_store_result_regd();
}

void ppc_subfeo() {
    ppc_grab_regsdab();
    uint32_t grab_xer = !!(ppc_state.spr[SPR::XER] & 0x20000000);
    ppc_result_d      = ~ppc_result_a + ppc_result_b + grab_xer;
    ppc_setsoov(ppc_result_b, ppc_result_a, ppc_result_d);
    ppc_carry(~ppc_result_a, ppc_result_d);
    ppc_store_result_regd();
}

void ppc_subfeodot() {
    ppc_grab_regsdab();
    uint32_t grab_xer = !!(ppc_state.spr[SPR::XER] & 0x20000000);
    ppc_result_d      = ~ppc_result_a + ppc_result_b + grab_xer;
    ppc_setsoov(ppc_result_b, ppc_result_a, ppc_result_d);
    ppc_carry(~ppc_result_a, ppc_result_d);
    ppc_changecrf0(ppc_result_d);
    ppc_store_result_regd();
}

void ppc_subfme() {
    ppc_grab_regsda();
    uint32_t grab_xer = !!(ppc_state.spr[SPR::XER] & 0x20000000);
    ppc_result_d      = ~ppc_result_a + grab_xer - 1;
    ppc_carry(~ppc_result_a, ppc_result_d);
    ppc_store_result_regd();
}

void ppc_subfmedot() {
    ppc_grab_regsda();
    uint32_t grab_xer = !!(ppc_state.spr[SPR::XER] & 0x20000000);
    ppc_result_d      = ~ppc_result_a + grab_xer - 1;
    ppc_carry(~ppc_result_a, ppc_result_d);
    ppc_changecrf0(ppc_result_d);
    ppc_store_result_regd();
}

void ppc_subfmeo() {
    ppc_grab_regsda();
    uint32_t grab_xer = !!(ppc_state.spr[SPR::XER] & 0x20000000);
    ppc_result_d      = ~ppc_result_a + grab_xer - 1;
    ppc_setsoov(ppc_result_b, ppc_result_a, ppc_result_d);
    ppc_carry(~ppc_result_a, ppc_result_d);
    ppc_store_result_regd();
}

void ppc_subfmeodot() {
    ppc_grab_regsda();
    uint32_t grab_xer = !!(ppc_state.spr[SPR::XER] & 0x20000000);
    ppc_result_d      = ~ppc_result_a + grab_xer - 1;
    ppc_setsoov(ppc_result_b, ppc_result_a, ppc_result_d);
    ppc_carry(~ppc_result_a, ppc_result_d);
    ppc_changecrf0(ppc_result_d);
    ppc_store_result_regd();
}

void ppc_subfze() {
    ppc_grab_regsda();
    ppc_result_d = ~ppc_result_a + (ppc_state.spr[SPR::XER] & 0x20000000);
    ppc_carry(~ppc_result_a, ppc_result_d);
    ppc_store_result_regd();
}

void ppc_subfzedot() {
    ppc_grab_regsda();
    ppc_result_d = ~ppc_result_a + (ppc_state.spr[SPR::XER] & 0x20000000);
    ppc_carry(~ppc_result_a, ppc_result_d);
    ppc_changecrf0(ppc_result_d);
    ppc_store_result_regd();
}

void ppc_subfzeo() {
    ppc_grab_regsda();
    ppc_result_d = ~ppc_result_a + (ppc_state.spr[SPR::XER] & 0x20000000);
    ppc_setsoov(ppc_result_b, ppc_result_a, ppc_result_d);
    ppc_carry(~ppc_result_a, ppc_result_d);
    ppc_store_result_regd();
}

void ppc_subfzeodot() {
    ppc_grab_regsda();
    ppc_result_d = ~ppc_result_a + (ppc_state.spr[SPR::XER] & 0x20000000);
    ppc_setsoov(ppc_result_b, ppc_result_a, ppc_result_d);
    ppc_carry(~ppc_result_a, ppc_result_d);
    ppc_changecrf0(ppc_result_d);
    ppc_store_result_regd();
}


void ppc_and() {
    ppc_grab_regssab();
    ppc_result_a = ppc_result_d & ppc_result_b;
    ppc_store_result_rega();
}

void ppc_anddot() {
    ppc_grab_regssab();
    ppc_result_a = ppc_result_d & ppc_result_b;
    ppc_changecrf0(ppc_result_a);
    ppc_store_result_rega();
}

void ppc_andc() {
    ppc_grab_regssab();
    ppc_result_a = ppc_result_d & ~(ppc_result_b);
    ppc_store_result_rega();
}

void ppc_andcdot() {
    ppc_grab_regssab();
    ppc_result_a = ppc_result_d & ~(ppc_result_b);
    ppc_changecrf0(ppc_result_a);
    ppc_store_result_rega();
}

void ppc_andidot() {
    ppc_grab_regssauimm();
    ppc_result_a = ppc_result_d & uimm;
    ppc_changecrf0(ppc_result_a);
    ppc_store_result_rega();
}

void ppc_andisdot() {
    ppc_grab_regssauimm();
    ppc_result_a = ppc_result_d & (uimm << 16);
    ppc_changecrf0(ppc_result_a);
    ppc_store_result_rega();
}

void ppc_nand() {
    ppc_grab_regssab();
    ppc_result_a = ~(ppc_result_d & ppc_result_b);
    ppc_store_result_rega();
}

void ppc_nanddot() {
    ppc_grab_regssab();
    ppc_result_a = ~(ppc_result_d & ppc_result_b);
    ppc_changecrf0(ppc_result_a);
    ppc_store_result_rega();
}

void ppc_or() {
    ppc_grab_regssab();
    ppc_result_a = ppc_result_d | ppc_result_b;
    ppc_store_result_rega();
}

void ppc_ordot() {
    ppc_grab_regssab();
    ppc_result_a = ppc_result_d | ppc_result_b;
    ppc_changecrf0(ppc_result_a);
    ppc_store_result_rega();
}

void ppc_orc() {
    ppc_grab_regssab();
    ppc_result_a = ppc_result_d | ~(ppc_result_b);
    ppc_store_result_rega();
}

void ppc_orcdot() {
    ppc_grab_regssab();
    ppc_result_a = ppc_result_d | ~(ppc_result_b);
    ppc_changecrf0(ppc_result_a);
    ppc_store_result_rega();
}

void ppc_ori() {
    ppc_grab_regssauimm();
    ppc_result_a = ppc_result_d | uimm;
    ppc_store_result_rega();
}

void ppc_oris() {
    ppc_grab_regssauimm();
    ppc_result_a = (uimm << 16) | ppc_result_d;
    ppc_store_result_rega();
}

void ppc_eqv() {
    ppc_grab_regssab();
    ppc_result_a = ~(ppc_result_d ^ ppc_result_b);
    ppc_store_result_rega();
}

void ppc_eqvdot() {
    ppc_grab_regssab();
    ppc_result_a = ~(ppc_result_d ^ ppc_result_b);
    ppc_changecrf0(ppc_result_a);
    ppc_store_result_rega();
}

void ppc_nor() {
    ppc_grab_regssab();
    ppc_result_a = ~(ppc_result_d | ppc_result_b);
    ppc_store_result_rega();
}

void ppc_nordot() {
    ppc_grab_regssab();
    ppc_result_a = ~(ppc_result_d | ppc_result_b);
    ppc_changecrf0(ppc_result_a);
    ppc_store_result_rega();
}

void ppc_xor() {
    ppc_grab_regssab();
    ppc_result_a = ppc_result_d ^ ppc_result_b;
    ppc_store_result_rega();
}

void ppc_xordot() {
    ppc_grab_regssab();
    ppc_result_a = ppc_result_d ^ ppc_result_b;
    ppc_changecrf0(ppc_result_a);
    ppc_store_result_rega();
}

void ppc_xori() {
    ppc_grab_regssauimm();
    ppc_result_a = ppc_result_d ^ uimm;
    ppc_store_result_rega();
}

void ppc_xoris() {
    ppc_grab_regssauimm();
    ppc_result_a = ppc_result_d ^ (uimm << 16);
    ppc_store_result_rega();
}

void ppc_neg() {
    ppc_grab_regsda();
    ppc_result_d = ~(ppc_result_a) + 1;
    ppc_store_result_regd();
}

void ppc_negdot() {
    ppc_grab_regsda();
    ppc_result_d = ~(ppc_result_a) + 1;
    ppc_changecrf0(ppc_result_d);
    ppc_store_result_regd();
}

void ppc_nego() {
    ppc_grab_regsda();
    ppc_result_d = ~(ppc_result_a) + 1;
    if (ppc_result_a == 0x80000000)
        ppc_state.spr[SPR::XER] |= 0xc0000000;
    else
        ppc_state.spr[SPR::XER] &= 0xBFFFFFFF;
    ppc_store_result_regd();
}

void ppc_negodot() {
    ppc_grab_regsda();
    ppc_result_d = ~(ppc_result_a) + 1;
    if (ppc_result_a == 0x80000000)
        ppc_state.spr[SPR::XER] |= 0xc0000000;
    else
        ppc_state.spr[SPR::XER] &= 0xBFFFFFFF;
    ppc_changecrf0(ppc_result_d);
    ppc_store_result_regd();
}

void ppc_cntlzw() {
    ppc_grab_regssa();

    uint32_t lead      = 0;
    uint32_t bit_check = ppc_result_d;

#ifdef USE_GCC_BUILTINS
    lead = __builtin_clz(bit_check);
#elif defined USE_VS_BUILTINS
    lead = __lzcnt(bit_check);
#else
    for (uint32_t mask = 0x80000000UL; mask; lead++, mask >>= 1) {
        if (bit_check & mask)
            break;
    }
#endif
    ppc_result_a = lead;
    ppc_store_result_rega();
}

void ppc_cntlzwdot() {
    ppc_grab_regssa();

    uint32_t lead      = 0;
    uint32_t bit_check = ppc_result_d;

#ifdef USE_GCC_BUILTINS
    lead = __builtin_clz(bit_check);
#elif defined USE_VS_BUILTINS
    lead = __lzcnt(bit_check);
#else
    for (uint32_t mask = 0x80000000UL; mask; lead++, mask >>= 1) {
        if (bit_check & mask)
            break;
    }
#endif
    ppc_result_a = lead;
    ppc_changecrf0(ppc_result_a);
    ppc_store_result_rega();
}

void ppc_mulhwu() {
    ppc_grab_regsdab();
    uint64_t product = (uint64_t)ppc_result_a * (uint64_t)ppc_result_b;
    ppc_result_d     = (uint32_t)(product >> 32);
    ppc_store_result_regd();
}

void ppc_mulhwudot() {
    ppc_grab_regsdab();
    uint64_t product = (uint64_t)ppc_result_a * (uint64_t)ppc_result_b;
    ppc_result_d     = (uint32_t)(product >> 32);
    ppc_changecrf0(ppc_result_d);
    ppc_store_result_regd();
}

void ppc_mulhw() {
    ppc_grab_regsdab();
    int64_t product = (int64_t)(int32_t)ppc_result_a * (int64_t)(int32_t)ppc_result_b;
    ppc_result_d    = product >> 32;
    ppc_store_result_regd();
}

void ppc_mulhwdot() {
    ppc_grab_regsdab();
    int64_t product = (int64_t)(int32_t)ppc_result_a * (int64_t)(int32_t)ppc_result_b;
    ppc_result_d    = product >> 32;
    ppc_changecrf0(ppc_result_d);
    ppc_store_result_regd();
}

void ppc_mullw() {
    ppc_grab_regsdab();
    int64_t product = (int64_t)(int32_t)ppc_result_a * (int64_t)(int32_t)ppc_result_b;
    ppc_result_d    = (uint32_t)product;
    ppc_store_result_regd();
}

void ppc_mullwdot() {
    ppc_grab_regsdab();
    int64_t product = (int64_t)(int32_t)ppc_result_a * (int64_t)(int32_t)ppc_result_b;
    ppc_result_d    = (uint32_t)product;
    ppc_changecrf0(ppc_result_d);
    ppc_store_result_regd();
}

void ppc_mullwo() {
    ppc_grab_regsdab();
    int64_t product = (int64_t)(int32_t)ppc_result_a * (int64_t)(int32_t)ppc_result_b;
    if (product != (int64_t)(int32_t)product) {
        ppc_state.spr[SPR::XER] |= 0xC0000000;
    } else {
        ppc_state.spr[SPR::XER] &= 0xBFFFFFFFUL;
    }
    ppc_result_d = (uint32_t)product;
    ppc_store_result_regd();
}

void ppc_mullwodot() {
    ppc_grab_regsdab();
    int64_t product = (int64_t)(int32_t)ppc_result_a * (int64_t)(int32_t)ppc_result_b;
    if (product != (int64_t)(int32_t)product) {
        ppc_state.spr[SPR::XER] |= 0xC0000000;
    } else {
        ppc_state.spr[SPR::XER] &= 0xBFFFFFFFUL;
    }
    ppc_result_d = (uint32_t)product;
    ppc_changecrf0(ppc_result_d);
    ppc_store_result_regd();
}

void ppc_mulli() {
    ppc_grab_regsdasimm();
    int64_t product = (int64_t)(int32_t)ppc_result_a * (int64_t)(int32_t)simm;
    ppc_result_d    = (uint32_t)product;
    ppc_store_result_regd();
}


void ppc_divw() {
    ppc_grab_regsdab();

    if (!ppc_result_b) {                                     /* handle the "anything / 0" case */
        ppc_result_d = (ppc_result_a & 0x80000000) ? -1 : 0; /* UNDOCUMENTED! */
    } else if (ppc_result_a == 0x80000000UL && ppc_result_b == 0xFFFFFFFFUL) {
        ppc_result_d = 0xFFFFFFFF;
    } else { /* normal signed devision */
        ppc_result_d = (int32_t)ppc_result_a / (int32_t)ppc_result_b;
    }

    ppc_store_result_regd();
}

void ppc_divwdot() {
    ppc_grab_regsdab();

    if (!ppc_result_b) {                                     /* handle the "anything / 0" case */
        ppc_result_d = (ppc_result_a & 0x80000000) ? -1 : 0; /* UNDOCUMENTED! */
    } else if (ppc_result_a == 0x80000000UL && ppc_result_b == 0xFFFFFFFFUL) {
        ppc_result_d = 0xFFFFFFFF;
    } else { /* normal signed devision */
        ppc_result_d = (int32_t)ppc_result_a / (int32_t)ppc_result_b;
    }

    ppc_changecrf0(ppc_result_d);
    ppc_store_result_regd();
}

void ppc_divwo() {
    ppc_grab_regsdab();

    if (!ppc_result_b) {                                     /* handle the "anything / 0" case */
        ppc_result_d = (ppc_result_a & 0x80000000) ? -1 : 0; /* UNDOCUMENTED! */
        ppc_state.spr[SPR::XER] |= 0xC0000000;
    } else if (ppc_result_a == 0x80000000UL && ppc_result_b == 0xFFFFFFFFUL) {
        ppc_result_d = 0xFFFFFFFF;
        ppc_state.spr[SPR::XER] |= 0xC0000000;
    } else { /* normal signed devision */
        ppc_result_d = (int32_t)ppc_result_a / (int32_t)ppc_result_b;
        ppc_state.spr[SPR::XER] &= 0xBFFFFFFFUL;
    }

    ppc_store_result_regd();
}

void ppc_divwodot() {
    ppc_grab_regsdab();

    if (!ppc_result_b) {                                     /* handle the "anything / 0" case */
        ppc_result_d = (ppc_result_a & 0x80000000) ? -1 : 0; /* UNDOCUMENTED! */
        ppc_state.spr[SPR::XER] |= 0xC0000000;
    } else if (ppc_result_a == 0x80000000UL && ppc_result_b == 0xFFFFFFFFUL) {
        ppc_result_d = 0xFFFFFFFF;
        ppc_state.spr[SPR::XER] |= 0xC0000000;
    } else { /* normal signed devision */
        ppc_result_d = (int32_t)ppc_result_a / (int32_t)ppc_result_b;
        ppc_state.spr[SPR::XER] &= 0xBFFFFFFFUL;
    }

    ppc_changecrf0(ppc_result_d);
    ppc_store_result_regd();
}

void ppc_divwu() {
    ppc_grab_regsdab();

    if (!ppc_result_b) { /* division by zero */
        ppc_result_d = 0;
    } else {
        ppc_result_d = ppc_result_a / ppc_result_b;
    }
    ppc_store_result_regd();
}

void ppc_divwudot() {
    ppc_grab_regsdab();

    if (!ppc_result_b) { /* division by zero */
        ppc_result_d = 0;
        ppc_state.cr |= 0x20000000;
    } else {
        ppc_result_d = ppc_result_a / ppc_result_b;
        ppc_changecrf0(ppc_result_d);
    }
    ppc_store_result_regd();
}

void ppc_divwuo() {
    ppc_grab_regsdab();

    if (!ppc_result_b) { /* division by zero */
        ppc_result_d = 0;
        ppc_state.spr[SPR::XER] |= 0xC0000000;
    } else {
        ppc_result_d = ppc_result_a / ppc_result_b;
        ppc_state.spr[SPR::XER] &= 0xBFFFFFFFUL;
    }
    ppc_store_result_regd();
}

void ppc_divwuodot() {
    ppc_grab_regsdab();

    if (!ppc_result_b) { /* division by zero */
        ppc_result_d = 0;
        ppc_state.spr[SPR::XER] |= 0xC0000000;
    } else {
        ppc_result_d = ppc_result_a / ppc_result_b;
        ppc_state.spr[SPR::XER] &= 0xBFFFFFFFUL;
    }
    ppc_changecrf0(ppc_result_d);
    ppc_store_result_regd();
}

// Value shifting

void ppc_slw() {
    ppc_grab_regssab();
    if (ppc_result_b & 0x20) {
        ppc_result_a = 0;
    } else {
        ppc_result_a = ppc_result_d << (ppc_result_b & 0x1F);
    }
    ppc_store_result_rega();
}

void ppc_slwdot() {
    ppc_grab_regssab();
    if (ppc_result_b & 0x20) {
        ppc_result_a = 0;
    } else {
        ppc_result_a = ppc_result_d << (ppc_result_b & 0x1F);
    }
    ppc_changecrf0(ppc_result_a);
    ppc_store_result_rega();
}

void ppc_srw() {
    ppc_grab_regssab();
    if (ppc_result_b & 0x20) {
        ppc_result_a = 0;
    } else {
        ppc_result_a = ppc_result_d >> (ppc_result_b & 0x1F);
    }
    ppc_store_result_rega();
}

void ppc_srwdot() {
    ppc_grab_regssab();
    if (ppc_result_b & 0x20) {
        ppc_result_a = 0;
    } else {
        ppc_result_a = ppc_result_d >> (ppc_result_b & 0x1F);
    }
    ppc_changecrf0(ppc_result_a);
    ppc_store_result_rega();
}

void ppc_sraw() {
    ppc_grab_regssab();
    if (ppc_result_b & 0x20) {
        ppc_result_a = (int32_t)ppc_result_d >> 31;
        ppc_state.spr[SPR::XER] |= (ppc_result_a & 1) << 29;
    } else {
        uint32_t shift = ppc_result_b & 0x1F;
        uint32_t mask  = (1 << shift) - 1;
        ppc_result_a   = (int32_t)ppc_result_d >> shift;
        if ((ppc_result_d & 0x80000000UL) && (ppc_result_d & mask)) {
            ppc_state.spr[SPR::XER] |= 0x20000000UL;
        } else {
            ppc_state.spr[SPR::XER] &= 0xDFFFFFFFUL;
        }
    }
    ppc_store_result_rega();
}

void ppc_srawdot() {
    ppc_grab_regssab();
    if (ppc_result_b & 0x20) {
        ppc_result_a = (int32_t)ppc_result_d >> 31;
        ppc_state.spr[SPR::XER] |= (ppc_result_a & 1) << 29;
    } else {
        uint32_t shift = ppc_result_b & 0x1F;
        uint32_t mask  = (1 << shift) - 1;
        ppc_result_a   = (int32_t)ppc_result_d >> shift;
        if ((ppc_result_d & 0x80000000UL) && (ppc_result_d & mask)) {
            ppc_state.spr[SPR::XER] |= 0x20000000UL;
        } else {
            ppc_state.spr[SPR::XER] &= 0xDFFFFFFFUL;
        }
    }
    ppc_changecrf0(ppc_result_a);
    ppc_store_result_rega();
}

void ppc_srawi() {
    ppc_grab_regssa();
    unsigned shift = (ppc_cur_instruction >> 11) & 0x1F;
    uint32_t mask  = (1 << shift) - 1;
    ppc_result_a   = (int32_t)ppc_result_d >> shift;
    if ((ppc_result_d & 0x80000000UL) && (ppc_result_d & mask)) {
        ppc_state.spr[SPR::XER] |= 0x20000000UL;
    } else {
        ppc_state.spr[SPR::XER] &= 0xDFFFFFFFUL;
    }
    ppc_store_result_rega();
}

void ppc_srawidot() {
    ppc_grab_regssa();
    unsigned shift = (ppc_cur_instruction >> 11) & 0x1F;
    uint32_t mask  = (1 << shift) - 1;
    ppc_result_a   = (int32_t)ppc_result_d >> shift;
    if ((ppc_result_d & 0x80000000UL) && (ppc_result_d & mask)) {
        ppc_state.spr[SPR::XER] |= 0x20000000UL;
    } else {
        ppc_state.spr[SPR::XER] &= 0xDFFFFFFFUL;
    }
    ppc_changecrf0(ppc_result_a);
    ppc_store_result_rega();
}

/** mask generator for rotate and shift instructions (§ 4.2.1.4 PowerpC PEM) */
static inline uint32_t rot_mask(unsigned rot_mb, unsigned rot_me) {
    uint32_t m1 = 0xFFFFFFFFUL >> rot_mb;
    uint32_t m2 = 0xFFFFFFFFUL << (31 - rot_me);
    return ((rot_mb <= rot_me) ? m2 & m1 : m1 | m2);
}

void ppc_rlwimi() {
    ppc_grab_regssa();
    unsigned rot_sh = (ppc_cur_instruction >> 11) & 31;
    unsigned rot_mb = (ppc_cur_instruction >> 6) & 31;
    unsigned rot_me = (ppc_cur_instruction >> 1) & 31;
    uint32_t mask   = rot_mask(rot_mb, rot_me);
    uint32_t r      = ((ppc_result_d << rot_sh) | (ppc_result_d >> (32 - rot_sh)));
    ppc_result_a    = (ppc_result_a & ~mask) | (r & mask);
    if ((ppc_cur_instruction & 0x01) == 1) {
        ppc_changecrf0(ppc_result_a);
    }
    ppc_store_result_rega();
}

void ppc_rlwinm() {
    ppc_grab_regssa();
    unsigned rot_sh = (ppc_cur_instruction >> 11) & 31;
    unsigned rot_mb = (ppc_cur_instruction >> 6) & 31;
    unsigned rot_me = (ppc_cur_instruction >> 1) & 31;
    uint32_t mask   = rot_mask(rot_mb, rot_me);
    uint32_t r      = ((ppc_result_d << rot_sh) | (ppc_result_d >> (32 - rot_sh)));
    ppc_result_a    = r & mask;
    if ((ppc_cur_instruction & 0x01) == 1) {
        ppc_changecrf0(ppc_result_a);
    }
    ppc_store_result_rega();
}

void ppc_rlwnm() {
    ppc_grab_regssab();
    unsigned rot_mb = (ppc_cur_instruction >> 6) & 31;
    unsigned rot_me = (ppc_cur_instruction >> 1) & 31;
    uint32_t mask   = rot_mask(rot_mb, rot_me);
    uint32_t r      = ((ppc_result_d << ppc_result_b) | (ppc_result_d >> (32 - ppc_result_b)));
    ppc_result_a    = r & mask;
    if ((ppc_cur_instruction & 0x01) == 1) {
        ppc_changecrf0(ppc_result_a);
    }
    ppc_store_result_rega();
}

void ppc_mfcr() {
    reg_d                = (ppc_cur_instruction >> 21) & 31;
    ppc_state.gpr[reg_d] = ppc_state.cr;
}

void ppc_mtsr() {
#ifdef PROFILER
    supervisor_inst_num++;
#endif
    if ((ppc_state.msr & 0x4000) == 0) {
        reg_s                 = (ppc_cur_instruction >> 21) & 31;
        grab_sr               = (ppc_cur_instruction >> 16) & 15;
        ppc_state.sr[grab_sr] = ppc_state.gpr[reg_s];
    }
}

void ppc_mtsrin() {
#ifdef PROFILER
    supervisor_inst_num++;
#endif
    if ((ppc_state.msr & 0x4000) == 0) {
        ppc_grab_regssb();
        grab_sr               = ppc_result_b >> 28;
        ppc_state.sr[grab_sr] = ppc_result_d;
    }
}

void ppc_mfsr() {
#ifdef PROFILER
    supervisor_inst_num++;
#endif
    if ((ppc_state.msr & 0x4000) == 0) {
        reg_d                = (ppc_cur_instruction >> 21) & 31;
        grab_sr              = (ppc_cur_instruction >> 16) & 15;
        ppc_state.gpr[reg_d] = ppc_state.sr[grab_sr];
    }
}

void ppc_mfsrin() {
#ifdef PROFILER
    supervisor_inst_num++;
#endif
    if ((ppc_state.msr & 0x4000) == 0) {
        ppc_grab_regsdb();
        grab_sr              = ppc_result_b >> 28;
        ppc_state.gpr[reg_d] = ppc_state.sr[grab_sr];
    }
}

void ppc_mfmsr() {
#ifdef PROFILER
    supervisor_inst_num++;
#endif
    if (ppc_state.msr & 0x4000) {
        ppc_exception_handler(Except_Type::EXC_PROGRAM, 0x00040000);
    }
    reg_d                = (ppc_cur_instruction >> 21) & 31;
    ppc_state.gpr[reg_d] = ppc_state.msr;
}

void ppc_mtmsr() {
#ifdef PROFILER
    supervisor_inst_num++;
#endif
    if (ppc_state.msr & 0x4000) {
        ppc_exception_handler(Except_Type::EXC_PROGRAM, 0x00040000);
    }
    reg_s         = (ppc_cur_instruction >> 21) & 31;
    ppc_state.msr = ppc_state.gpr[reg_s];
}

void ppc_mfspr() {
    uint32_t ref_spr = (((ppc_cur_instruction >> 11) & 31) << 5) | ((ppc_cur_instruction >> 16) & 31);

#ifdef PROFILER
    if (ref_spr > 31) {
        supervisor_inst_num++;
    }
#endif
    reg_d                = (ppc_cur_instruction >> 21) & 31;
    ppc_state.gpr[reg_d] = ppc_state.spr[ref_spr];
}

void ppc_mtspr() {
    uint32_t ref_spr = (((ppc_cur_instruction >> 11) & 31) << 5) | ((ppc_cur_instruction >> 16) & 31);
    reg_s            = (ppc_cur_instruction >> 21) & 31;

#ifdef PROFILER
    if (ref_spr > 31) {
        supervisor_inst_num++;
    }
#endif

    if (ref_spr != 287) {
        ppc_state.spr[ref_spr] = ppc_state.gpr[reg_s];
    }

    switch (ref_spr) {
        // Mirror the TBRs in the SPR range to the user-mode TBRs.
    case 284:
        timebase_counter = (timebase_counter & 0xFFFFFFFF00000000ULL) + ppc_state.gpr[reg_s];
        break;
    case 285:
        timebase_counter = (timebase_counter & 0x00000000FFFFFFFFULL) +
            (((uint64_t)(ppc_state.gpr[reg_s])) << 32);
        break;
    case 528:
    case 529:
    case 530:
    case 531:
    case 532:
    case 533:
    case 534:
    case 535:
        ibat_update(ref_spr);
        break;
    case 536:
    case 537:
    case 538:
    case 539:
    case 540:
    case 541:
    case 542:
    case 543:
        dbat_update(ref_spr);
    }
}

void ppc_mftb() {
    uint32_t ref_spr = (((ppc_cur_instruction >> 11) & 31) << 5) | ((ppc_cur_instruction >> 16) & 31);
    reg_d            = (ppc_cur_instruction >> 21) & 31;
    switch (ref_spr) {
    case 268:
        ppc_state.gpr[reg_d] = timebase_counter & 0xFFFFFFFFUL;
        break;
    case 269:
        ppc_state.gpr[reg_d] = (timebase_counter >> 32) & 0xFFFFFFFFUL;
        break;
    default:
        std::cout << "Invalid TBR access attempted!" << std::endl;
    }
}

void ppc_mtcrf() {
    uint32_t cr_mask = 0;
    ppc_grab_regssa();
    crm = ((ppc_cur_instruction >> 12) & 255);
    // check this
    cr_mask += (crm & 128) ? 0xF0000000 : 0x00000000;
    cr_mask += (crm & 64) ? 0x0F000000 : 0x00000000;
    cr_mask += (crm & 32) ? 0x00F00000 : 0x00000000;
    cr_mask += (crm & 16) ? 0x000F0000 : 0x00000000;
    cr_mask += (crm & 8) ? 0x0000F000 : 0x00000000;
    cr_mask += (crm & 4) ? 0x00000F00 : 0x00000000;
    cr_mask += (crm & 2) ? 0x000000F0 : 0x00000000;
    cr_mask += (crm & 1) ? 0x0000000F : 0x00000000;
    ppc_state.cr = (ppc_result_d & cr_mask) | (ppc_state.cr & ~(cr_mask));
}

void ppc_mcrxr() {
    crf_d        = (ppc_cur_instruction >> 23) & 7;
    crf_d        = crf_d << 2;
    ppc_state.cr = (ppc_state.cr & ~(0xF0000000UL >> crf_d)) |
        ((ppc_state.spr[SPR::XER] & 0xF0000000UL) >> crf_d);
    ppc_state.spr[SPR::XER] &= 0x0FFFFFFF;
}

void ppc_extsb() {
    ppc_grab_regssa();
    ppc_result_d = ppc_result_d & 0xFF;
    ppc_result_a = (ppc_result_d < 0x80) ? (ppc_result_d & 0x000000FF)
                                         : (0xFFFFFF00UL | (ppc_result_d & 0x000000FF));
    ppc_store_result_rega();
}

void ppc_extsbdot() {
    ppc_grab_regssa();
    ppc_result_d = ppc_result_d & 0xFF;
    ppc_result_a = (ppc_result_d < 0x80) ? (ppc_result_d & 0x000000FF)
                                         : (0xFFFFFF00UL | (ppc_result_d & 0x000000FF));
    ppc_changecrf0(ppc_result_a);
    ppc_store_result_rega();
}

void ppc_extsh() {
    ppc_grab_regssa();
    ppc_result_d = ppc_result_d & 0xFFFF;
    ppc_result_a = (ppc_result_d < 0x8000) ? (ppc_result_d & 0x0000FFFF)
                                           : (0xFFFF0000UL | (ppc_result_d & 0x0000FFFF));
    ppc_store_result_rega();
}

void ppc_extshdot() {
    ppc_grab_regssa();
    ppc_result_d = ppc_result_d & 0xFFFF;
    ppc_result_a = (ppc_result_d < 0x8000) ? (ppc_result_d & 0x0000FFFF)
                                           : (0xFFFF0000UL | (ppc_result_d & 0x0000FFFF));
    ppc_changecrf0(ppc_result_a);
    ppc_store_result_rega();
}

// Branching Instructions

// The last two bytes of the instruction are used for determining how the branch happens.
// The middle 24 bytes are the 24-bit address to use for branching to.


void ppc_b() {
    uint32_t quick_test = (ppc_cur_instruction & 0x03FFFFFC);
    adr_li              = (quick_test < 0x2000000) ? quick_test : (0xFC000000UL + quick_test);
    ppc_next_instruction_address = (uint32_t)(ppc_state.pc + adr_li);
    grab_branch                  = 1;
    bb_kind                      = BB_end_kind::BB_BRANCH;
}

void ppc_bl() {
    uint32_t quick_test = (ppc_cur_instruction & 0x03FFFFFC);
    adr_li              = (quick_test < 0x2000000) ? quick_test : (0xFC000000UL + quick_test);
    ppc_next_instruction_address = (uint32_t)(ppc_state.pc + adr_li);
    ppc_state.spr[SPR::LR]       = (uint32_t)(ppc_state.pc + 4);
    grab_branch                  = 1;
    bb_kind                      = BB_end_kind::BB_BRANCH;
}

void ppc_ba() {
    uint32_t quick_test = (ppc_cur_instruction & 0x03FFFFFC);
    adr_li              = (quick_test < 0x2000000) ? quick_test : (0xFC000000UL + quick_test);
    ppc_next_instruction_address = adr_li;
    grab_branch                  = 1;
    bb_kind                      = BB_end_kind::BB_BRANCH;
}

void ppc_bla() {
    uint32_t quick_test = (ppc_cur_instruction & 0x03FFFFFC);
    adr_li              = (quick_test < 0x2000000) ? quick_test : (0xFC000000UL + quick_test);
    ppc_next_instruction_address = adr_li;
    ppc_state.spr[SPR::LR]       = ppc_state.pc + 4;
    grab_branch                  = 1;
    bb_kind                      = BB_end_kind::BB_BRANCH;
}

void ppc_bc() {
    uint32_t ctr_ok;
    uint32_t cnd_ok;
    uint32_t br_bo = (ppc_cur_instruction >> 21) & 31;
    uint32_t br_bi = (ppc_cur_instruction >> 16) & 31;
    int32_t br_bd  = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFC));

    if (!(br_bo & 0x04)) {
        (ppc_state.spr[SPR::CTR])--; /* decrement CTR */
    }
    ctr_ok = (br_bo & 0x04) || ((ppc_state.spr[SPR::CTR] != 0) == !(br_bo & 0x02));
    cnd_ok = (br_bo & 0x10) || (!(ppc_state.cr & (0x80000000UL >> br_bi)) == !(br_bo & 0x08));

    if (ctr_ok && cnd_ok) {
        ppc_next_instruction_address = (ppc_state.pc + br_bd);
        grab_branch                  = 1;
        bb_kind                      = BB_end_kind::BB_BRANCH;
    }
}

void ppc_bca() {
    uint32_t ctr_ok;
    uint32_t cnd_ok;
    uint32_t br_bo = (ppc_cur_instruction >> 21) & 31;
    uint32_t br_bi = (ppc_cur_instruction >> 16) & 31;
    int32_t br_bd  = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFC));

    if (!(br_bo & 0x04)) {
        (ppc_state.spr[SPR::CTR])--; /* decrement CTR */
    }
    ctr_ok = (br_bo & 0x04) || ((ppc_state.spr[SPR::CTR] != 0) == !(br_bo & 0x02));
    cnd_ok = (br_bo & 0x10) || (!(ppc_state.cr & (0x80000000UL >> br_bi)) == !(br_bo & 0x08));

    if (ctr_ok && cnd_ok) {
        ppc_next_instruction_address = br_bd;
        grab_branch                  = 1;
        bb_kind                      = BB_end_kind::BB_BRANCH;
    }
}

void ppc_bcl() {
    uint32_t ctr_ok;
    uint32_t cnd_ok;
    uint32_t br_bo = (ppc_cur_instruction >> 21) & 31;
    uint32_t br_bi = (ppc_cur_instruction >> 16) & 31;
    int32_t br_bd  = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFC));

    if (!(br_bo & 0x04)) {
        (ppc_state.spr[SPR::CTR])--; /* decrement CTR */
    }
    ctr_ok = (br_bo & 0x04) || ((ppc_state.spr[SPR::CTR] != 0) == !(br_bo & 0x02));
    cnd_ok = (br_bo & 0x10) || (!(ppc_state.cr & (0x80000000UL >> br_bi)) == !(br_bo & 0x08));

    if (ctr_ok && cnd_ok) {
        ppc_next_instruction_address = (ppc_state.pc + br_bd);
        grab_branch                  = 1;
        bb_kind                      = BB_end_kind::BB_BRANCH;
    }
    ppc_state.spr[SPR::LR] = ppc_state.pc + 4;
}

void ppc_bcla() {
    uint32_t ctr_ok;
    uint32_t cnd_ok;
    uint32_t br_bo = (ppc_cur_instruction >> 21) & 31;
    uint32_t br_bi = (ppc_cur_instruction >> 16) & 31;
    int32_t br_bd  = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFC));

    if (!(br_bo & 0x04)) {
        (ppc_state.spr[SPR::CTR])--; /* decrement CTR */
    }
    ctr_ok = (br_bo & 0x04) || ((ppc_state.spr[SPR::CTR] != 0) == !(br_bo & 0x02));
    cnd_ok = (br_bo & 0x10) || (!(ppc_state.cr & (0x80000000UL >> br_bi)) == !(br_bo & 0x08));

    if (ctr_ok && cnd_ok) {
        ppc_next_instruction_address = br_bd;
        grab_branch                  = 1;
        bb_kind                      = BB_end_kind::BB_BRANCH;
    }
    ppc_state.spr[SPR::LR] = ppc_state.pc + 4;
}

void ppc_bcctr() {
    uint32_t br_bo = (ppc_cur_instruction >> 21) & 31;
    uint32_t br_bi = (ppc_cur_instruction >> 16) & 31;

    uint32_t cnd_ok = (br_bo & 0x10) ||
        (!(ppc_state.cr & (0x80000000UL >> br_bi)) == !(br_bo & 0x08));

    if (cnd_ok) {
        ppc_next_instruction_address = (ppc_state.spr[SPR::CTR] & 0xFFFFFFFCUL);
        grab_branch                  = 1;
        bb_kind                      = BB_end_kind::BB_BRANCH;
    }
}

void ppc_bcctrl() {
    uint32_t br_bo = (ppc_cur_instruction >> 21) & 31;
    uint32_t br_bi = (ppc_cur_instruction >> 16) & 31;

    uint32_t cnd_ok = (br_bo & 0x10) ||
        (!(ppc_state.cr & (0x80000000UL >> br_bi)) == !(br_bo & 0x08));

    if (cnd_ok) {
        ppc_next_instruction_address = (ppc_state.spr[SPR::CTR] & 0xFFFFFFFCUL);
        grab_branch                  = 1;
        bb_kind                      = BB_end_kind::BB_BRANCH;
    }
    ppc_state.spr[SPR::LR] = ppc_state.pc + 4;
}

void ppc_bclr() {
    uint32_t br_bo = (ppc_cur_instruction >> 21) & 31;
    uint32_t br_bi = (ppc_cur_instruction >> 16) & 31;
    uint32_t ctr_ok;
    uint32_t cnd_ok;

    if (!(br_bo & 0x04)) {
        (ppc_state.spr[SPR::CTR])--; /* decrement CTR */
    }
    ctr_ok = (br_bo & 0x04) || ((ppc_state.spr[SPR::CTR] != 0) == !(br_bo & 0x02));
    cnd_ok = (br_bo & 0x10) || (!(ppc_state.cr & (0x80000000UL >> br_bi)) == !(br_bo & 0x08));

    if (ctr_ok && cnd_ok) {
        ppc_next_instruction_address = (ppc_state.spr[SPR::LR] & 0xFFFFFFFCUL);
        grab_branch                  = 1;
        bb_kind                      = BB_end_kind::BB_BRANCH;
    }
}

void ppc_bclrl() {
    uint32_t br_bo = (ppc_cur_instruction >> 21) & 31;
    uint32_t br_bi = (ppc_cur_instruction >> 16) & 31;
    uint32_t ctr_ok;
    uint32_t cnd_ok;

    if (!(br_bo & 0x04)) {
        (ppc_state.spr[SPR::CTR])--; /* decrement CTR */
    }
    ctr_ok = (br_bo & 0x04) || ((ppc_state.spr[SPR::CTR] != 0) == !(br_bo & 0x02));
    cnd_ok = (br_bo & 0x10) || (!(ppc_state.cr & (0x80000000UL >> br_bi)) == !(br_bo & 0x08));

    if (ctr_ok && cnd_ok) {
        ppc_next_instruction_address = (ppc_state.spr[SPR::LR] & 0xFFFFFFFCUL);
        grab_branch                  = 1;
        bb_kind                      = BB_end_kind::BB_BRANCH;
    }
    ppc_state.spr[SPR::LR] = ppc_state.pc + 4;
}
// Compare Instructions

void ppc_cmp() {
#ifdef CHECK_INVALID
    if (ppc_cur_instruction & 0x200000) {
        LOG_F(WARNING, "Invalid CMP instruction form (L=1)!\n");
        return;
    }
#endif

    crf_d = (ppc_cur_instruction >> 23) & 7;
    crf_d = crf_d << 2;
    ppc_grab_regssab();
    xercon = (ppc_state.spr[SPR::XER] & 0x80000000UL) >> 3;
    cmp_c  = (((int32_t)ppc_result_a) == ((int32_t)ppc_result_b))
        ? 0x20000000UL
        : (((int32_t)ppc_result_a) > ((int32_t)ppc_result_b)) ? 0x40000000UL : 0x80000000UL;
    ppc_state.cr = ((ppc_state.cr & ~(0xf0000000UL >> crf_d)) | ((cmp_c + xercon) >> crf_d));
}

void ppc_cmpi() {
#ifdef CHECK_INVALID
    if (ppc_cur_instruction & 0x200000) {
        LOG_F(WARNING, "Invalid CMPI instruction form (L=1)!\n");
        return;
    }
#endif

    crf_d = (ppc_cur_instruction >> 23) & 7;
    crf_d = crf_d << 2;
    ppc_grab_regsasimm();
    xercon = (ppc_state.spr[SPR::XER] & 0x80000000UL) >> 3;
    cmp_c  = (((int32_t)ppc_result_a) == simm)
        ? 0x20000000UL
        : (((int32_t)ppc_result_a) > simm) ? 0x40000000UL : 0x80000000UL;
    ppc_state.cr = ((ppc_state.cr & ~(0xf0000000UL >> crf_d)) | ((cmp_c + xercon) >> crf_d));
}

void ppc_cmpl() {
#ifdef CHECK_INVALID
    if (ppc_cur_instruction & 0x200000) {
        LOG_F(WARNING, "Invalid CMPL instruction form (L=1)!\n");
        return;
    }
#endif

    crf_d = (ppc_cur_instruction >> 23) & 7;
    crf_d = crf_d << 2;
    ppc_grab_regssab();
    xercon = (ppc_state.spr[SPR::XER] & 0x80000000UL) >> 3;
    cmp_c  = (ppc_result_a == ppc_result_b)
        ? 0x20000000UL
        : (ppc_result_a > ppc_result_b) ? 0x40000000UL : 0x80000000UL;
    ppc_state.cr = ((ppc_state.cr & ~(0xf0000000UL >> crf_d)) | ((cmp_c + xercon) >> crf_d));
}

void ppc_cmpli() {
#ifdef CHECK_INVALID
    if (ppc_cur_instruction & 0x200000) {
        LOG_F(WARNING, "Invalid CMPLI instruction form (L=1)!\n");
        return;
    }
#endif

    crf_d = (ppc_cur_instruction >> 23) & 7;
    crf_d = crf_d << 2;
    ppc_grab_regssauimm();
    xercon = (ppc_state.spr[SPR::XER] & 0x80000000UL) >> 3;
    cmp_c  = (ppc_result_a == uimm) ? 0x20000000UL
                                   : (ppc_result_a > uimm) ? 0x40000000UL : 0x80000000UL;
    ppc_state.cr = ((ppc_state.cr & ~(0xf0000000UL >> crf_d)) | ((cmp_c + xercon) >> crf_d));
}

// Condition Register Changes

void ppc_crand() {
    ppc_grab_regsdab();
    if ((ppc_state.cr & (0x80000000UL >> reg_a)) && (ppc_state.cr & (0x80000000UL >> reg_b))) {
        ppc_state.cr |= (0x80000000UL >> reg_d);
    } else {
        ppc_state.cr &= ~(0x80000000UL >> reg_d);
    }
}
void ppc_crandc() {
    ppc_grab_regsdab();
    if ((ppc_state.cr & (0x80000000UL >> reg_a)) && !(ppc_state.cr & (0x80000000UL >> reg_b))) {
        ppc_state.cr |= (0x80000000UL >> reg_d);
    } else {
        ppc_state.cr &= ~(0x80000000UL >> reg_d);
    }
}
void ppc_creqv() {
    ppc_grab_regsdab();
    if (!((ppc_state.cr & (0x80000000UL >> reg_a)) ^ (ppc_state.cr & (0x80000000UL >> reg_b)))) {
        ppc_state.cr |= (0x80000000UL >> reg_d);
    } else {
        ppc_state.cr &= ~(0x80000000UL >> reg_d);
    }
}
void ppc_crnand() {
    ppc_grab_regsdab();
    if (!((ppc_state.cr & (0x80000000UL >> reg_a)) && (ppc_state.cr & (0x80000000UL >> reg_b)))) {
        ppc_state.cr |= (0x80000000UL >> reg_d);
    } else {
        ppc_state.cr &= ~(0x80000000UL >> reg_d);
    }
}
void ppc_crnor() {
    ppc_grab_regsdab();
    if (!((ppc_state.cr & (0x80000000UL >> reg_a)) || (ppc_state.cr & (0x80000000UL >> reg_b)))) {
        ppc_state.cr |= (0x80000000UL >> reg_d);
    } else {
        ppc_state.cr &= ~(0x80000000UL >> reg_d);
    }
}

void ppc_cror() {
    ppc_grab_regsdab();
    if ((ppc_state.cr & (0x80000000UL >> reg_a)) || (ppc_state.cr & (0x80000000UL >> reg_b))) {
        ppc_state.cr |= (0x80000000UL >> reg_d);
    } else {
        ppc_state.cr &= ~(0x80000000UL >> reg_d);
    }
}
void ppc_crorc() {
    ppc_grab_regsdab();
    if ((ppc_state.cr & (0x80000000UL >> reg_a)) || !(ppc_state.cr & (0x80000000UL >> reg_b))) {
        ppc_state.cr |= (0x80000000UL >> reg_d);
    } else {
        ppc_state.cr &= ~(0x80000000UL >> reg_d);
    }
}
void ppc_crxor() {
    ppc_grab_regsdab();
    if ((ppc_state.cr & (0x80000000UL >> reg_a)) ^ (ppc_state.cr & (0x80000000UL >> reg_b))) {
        ppc_state.cr |= (0x80000000UL >> reg_d);
    } else {
        ppc_state.cr &= ~(0x80000000UL >> reg_d);
    }
}

// Processor MGMT Fns.

void ppc_rfi() {
#ifdef PROFILER
    supervisor_inst_num++;
#endif
    uint32_t new_srr1_val        = (ppc_state.spr[SPR::SRR1] & 0x87C0FF73UL);
    uint32_t new_msr_val         = (ppc_state.msr & ~(0x87C0FF73UL));
    ppc_state.msr                = (new_msr_val | new_srr1_val) & 0xFFFBFFFFUL;
    ppc_next_instruction_address = ppc_state.spr[SPR::SRR0] & 0xFFFFFFFCUL;

    grab_return = true;
    bb_kind     = BB_end_kind::BB_RFI;
}

void ppc_sc() {
    ppc_exception_handler(Except_Type::EXC_SYSCALL, 0x20000);
}

void ppc_tw() {
    reg_a  = (ppc_cur_instruction >> 11) & 31;
    reg_b  = (ppc_cur_instruction >> 16) & 31;
    ppc_to = (ppc_cur_instruction >> 21) & 31;
    if ((((int32_t)ppc_state.gpr[reg_a] < (int32_t)ppc_state.gpr[reg_b]) & (ppc_to & 0x10)) ||
        (((int32_t)ppc_state.gpr[reg_a] > (int32_t)ppc_state.gpr[reg_b]) & (ppc_to & 0x08)) ||
        (((int32_t)ppc_state.gpr[reg_a] == (int32_t)ppc_state.gpr[reg_b]) & (ppc_to & 0x04)) ||
        ((ppc_state.gpr[reg_a] < ppc_state.gpr[reg_b]) & (ppc_to & 0x02)) ||
        ((ppc_state.gpr[reg_a] > ppc_state.gpr[reg_b]) & (ppc_to & 0x01))) {
        ppc_exception_handler(Except_Type::EXC_PROGRAM, 0x20000);
    }
}

void ppc_twi() {
    simm   = (int32_t)((int16_t)((ppc_cur_instruction)&0xFFFF));
    reg_a  = (ppc_cur_instruction >> 16) & 0x1F;
    ppc_to = (ppc_cur_instruction >> 21) & 0x1F;
    if ((((int32_t)ppc_state.gpr[reg_a] < simm) && (ppc_to & 0x10)) ||
        (((int32_t)ppc_state.gpr[reg_a] > simm) && (ppc_to & 0x08)) ||
        (((int32_t)ppc_state.gpr[reg_a] == simm) && (ppc_to & 0x04)) ||
        ((ppc_state.gpr[reg_a] < (uint32_t)simm) && (ppc_to & 0x02)) ||
        ((ppc_state.gpr[reg_a] > (uint32_t)simm) && (ppc_to & 0x01))) {
        ppc_exception_handler(Except_Type::EXC_PROGRAM, 0x20000);
    }
}

void ppc_eieio() {
    /* placeholder */
}

void ppc_isync() {
    /* placeholder */
}

void ppc_sync() {
    /* placeholder */
}

void ppc_icbi() {
    /* placeholder */
}

void ppc_dcbf() {
    /* placeholder */
}

void ppc_dcbi() {
#ifdef PROFILER
    supervisor_inst_num++;
#endif
    /* placeholder */
}

void ppc_dcbst() {
    /* placeholder */
}

void ppc_dcbt() {
    // Not needed, the HDI reg is touched to no-op this instruction.
    return;
}

void ppc_dcbtst() {
    // Not needed, the HDI reg is touched to no-op this instruction.
    return;
}

void ppc_dcbz() {
    ppc_grab_regsdab();
    ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
    if (!(ppc_state.pc & 32) && (ppc_state.pc < 0xFFFFFFE0UL)) {
        ppc_grab_regsdab();
        ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
        mem_write_qword(ppc_effective_address, 0);
        mem_write_qword((ppc_effective_address + 8), 0);
        mem_write_qword((ppc_effective_address + 16), 0);
        mem_write_qword((ppc_effective_address + 24), 0);
    } else {
        ppc_exception_handler(Except_Type::EXC_ALIGNMENT, 0x00000);
    }
}


// Integer Load and Store Functions

void ppc_stb() {
    ppc_grab_regssa();
    ppc_effective_address = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFF));
    ppc_effective_address += (reg_a > 0) ? ppc_result_a : 0;
    mem_write_byte(ppc_effective_address, ppc_result_d);
}

void ppc_stbx() {
    ppc_grab_regssab();
    ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
    mem_write_byte(ppc_effective_address, ppc_result_d);
}

void ppc_stbu() {
    ppc_grab_regssa();
    if (reg_a != 0) {
        ppc_effective_address = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFF));
        ppc_effective_address += ppc_result_a;
        mem_write_byte(ppc_effective_address, ppc_result_d);
        ppc_state.gpr[reg_a] = ppc_effective_address;
    } else {
        ppc_exception_handler(Except_Type::EXC_PROGRAM, 0x20000);
    }
}

void ppc_stbux() {
    ppc_grab_regssab();
    if (reg_a != 0) {
        ppc_effective_address = ppc_result_a + ppc_result_b;
        mem_write_byte(ppc_effective_address, ppc_result_d);
        ppc_state.gpr[reg_a] = ppc_effective_address;
    } else {
        ppc_exception_handler(Except_Type::EXC_PROGRAM, 0x20000);
    }
}

void ppc_sth() {
    ppc_grab_regssa();
    ppc_effective_address = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFF));
    ppc_effective_address += (reg_a > 0) ? ppc_result_a : 0;
    mem_write_word(ppc_effective_address, ppc_result_d);
}

void ppc_sthu() {
    ppc_grab_regssa();
    if (reg_a != 0) {
        ppc_effective_address = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFF));
        ppc_effective_address += ppc_result_a;
        mem_write_word(ppc_effective_address, ppc_result_d);
        ppc_state.gpr[reg_a] = ppc_effective_address;
    } else {
        ppc_exception_handler(Except_Type::EXC_PROGRAM, 0x20000);
    }
}

void ppc_sthux() {
    ppc_grab_regssab();
    if (reg_a != 0) {
        ppc_effective_address = ppc_result_a + ppc_result_b;
        mem_write_word(ppc_effective_address, ppc_result_d);
        ppc_state.gpr[reg_a] = ppc_effective_address;
    } else {
        ppc_exception_handler(Except_Type::EXC_PROGRAM, 0x20000);
    }
}

void ppc_sthx() {
    ppc_grab_regssab();
    ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
    mem_write_word(ppc_effective_address, ppc_result_d);
}

void ppc_sthbrx() {
    ppc_grab_regssab();
    ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
    ppc_result_d          = (uint32_t)(BYTESWAP_16((uint16_t)ppc_result_d));
    mem_write_word(ppc_effective_address, ppc_result_d);
}
void ppc_stw() {
    ppc_grab_regssa();
    ppc_effective_address = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFF));
    ppc_effective_address += (reg_a > 0) ? ppc_result_a : 0;
    mem_write_dword(ppc_effective_address, ppc_result_d);
}

void ppc_stwx() {
    ppc_grab_regssab();
    ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
    mem_write_dword(ppc_effective_address, ppc_result_d);
}

void ppc_stwcx() {
    // PLACEHOLDER CODE FOR STWCX - We need to check for reserve memory
    ppc_grab_regssab();
    ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
    if (ppc_state.reserve) {
        mem_write_dword(ppc_effective_address, ppc_result_d);
        ppc_state.cr |= (ppc_state.spr[SPR::XER] & 0x80000000) ? 0x30000000 : 0x20000000;
        ppc_state.reserve = false;
    } else {
        ppc_state.cr |= (ppc_state.spr[SPR::XER] & 0x80000000) ? 0x10000000 : 0;
    }
}

void ppc_stwu() {
    ppc_grab_regssa();
    if (reg_a != 0) {
        ppc_effective_address = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFF));
        ppc_effective_address += ppc_result_a;
        mem_write_dword(ppc_effective_address, ppc_result_d);
        ppc_state.gpr[reg_a] = ppc_effective_address;
    } else {
        ppc_exception_handler(Except_Type::EXC_PROGRAM, 0x20000);
    }
}

void ppc_stwux() {
    ppc_grab_regssab();
    if (reg_a != 0) {
        ppc_effective_address = ppc_result_a + ppc_result_b;
        mem_write_dword(ppc_effective_address, ppc_result_d);
        ppc_state.gpr[reg_a] = ppc_effective_address;
    } else {
        ppc_exception_handler(Except_Type::EXC_PROGRAM, 0x20000);
    }
}

void ppc_stwbrx() {
    ppc_grab_regssab();
    ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
    ppc_result_d          = BYTESWAP_32(ppc_result_d);
    mem_write_dword(ppc_effective_address, ppc_result_d);
}

void ppc_stmw() {
    ppc_grab_regssa();
    ppc_effective_address = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFF));
    ppc_effective_address += (reg_a > 0) ? ppc_result_a : 0;

    /* what should we do if EA is unaligned? */
    if (ppc_effective_address & 3) {
        ppc_exception_handler(Except_Type::EXC_ALIGNMENT, 0x00000);
    }

    for (; reg_s <= 31; reg_s++) {
        mem_write_dword(ppc_effective_address, ppc_state.gpr[reg_s]);
        ppc_effective_address += 4;
    }
}

void ppc_lbz() {
    ppc_grab_regsda();
    ppc_effective_address = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFF));
    ppc_effective_address += (reg_a > 0) ? ppc_result_a : 0;
    ppc_result_d = mem_grab_byte(ppc_effective_address);
    ppc_store_result_regd();
}

void ppc_lbzu() {
    ppc_grab_regsda();
    ppc_effective_address = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFF));
    if ((reg_a != reg_d) || reg_a != 0) {
        ppc_effective_address += ppc_result_a;
        ppc_result_d = mem_grab_byte(ppc_effective_address);
        ppc_result_a = ppc_effective_address;
        ppc_store_result_regd();
        ppc_store_result_rega();
    } else {
        ppc_exception_handler(Except_Type::EXC_PROGRAM, 0x20000);
    }
}

void ppc_lbzx() {
    ppc_grab_regsdab();
    ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
    ppc_result_d          = mem_grab_byte(ppc_effective_address);
    ppc_store_result_regd();
}

void ppc_lbzux() {
    ppc_grab_regsdab();
    if ((reg_a != reg_d) || reg_a != 0) {
        ppc_effective_address = ppc_result_a + ppc_result_b;
        ppc_result_d          = mem_grab_byte(ppc_effective_address);
        ppc_result_a          = ppc_effective_address;
        ppc_store_result_regd();
        ppc_store_result_rega();
    } else {
        ppc_exception_handler(Except_Type::EXC_PROGRAM, 0x20000);
    }
}


void ppc_lhz() {
    ppc_grab_regsda();
    ppc_effective_address = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFF));
    ppc_effective_address += (reg_a > 0) ? ppc_result_a : 0;
    ppc_result_d = mem_grab_word(ppc_effective_address);
    ppc_store_result_regd();
}

void ppc_lhzu() {
    ppc_grab_regsda();
    if ((reg_a != reg_d) || reg_a != 0) {
        ppc_effective_address = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFF));
        ppc_effective_address += ppc_result_a;
        ppc_result_d = mem_grab_word(ppc_effective_address);
        ppc_result_a = ppc_effective_address;
        ppc_store_result_regd();
        ppc_store_result_rega();
    } else {
        ppc_exception_handler(Except_Type::EXC_PROGRAM, 0x20000);
    }
}

void ppc_lhzx() {
    ppc_grab_regsdab();
    ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
    ppc_result_d          = mem_grab_word(ppc_effective_address);
    ppc_store_result_regd();
}

void ppc_lhzux() {
    ppc_grab_regsdab();
    if ((reg_a != reg_d) || reg_a != 0) {
        ppc_effective_address = ppc_result_a + ppc_result_b;
        ppc_result_d          = mem_grab_word(ppc_effective_address);
        ppc_result_a          = ppc_effective_address;
        ppc_store_result_regd();
        ppc_store_result_rega();
    } else {
        ppc_exception_handler(Except_Type::EXC_PROGRAM, 0x20000);
    }
}

void ppc_lha() {
    ppc_grab_regsda();
    ppc_effective_address = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFF));
    ppc_effective_address += (reg_a > 0) ? ppc_result_a : 0;
    uint16_t val = mem_grab_word(ppc_effective_address);
    if (val & 0x8000) {
        ppc_result_d = 0xFFFF0000UL | (uint32_t)val;
    } else {
        ppc_result_d = (uint32_t)val;
    }
    ppc_store_result_regd();
}

void ppc_lhau() {
    ppc_grab_regsda();
    if ((reg_a != reg_d) || reg_a != 0) {
        ppc_effective_address = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFF));
        ppc_effective_address += ppc_result_a;
        uint16_t val = mem_grab_word(ppc_effective_address);
        if (val & 0x8000) {
            ppc_result_d = 0xFFFF0000UL | (uint32_t)val;
        } else {
            ppc_result_d = (uint32_t)val;
        }
        ppc_store_result_regd();
        ppc_result_a = ppc_effective_address;
        ppc_store_result_rega();
    } else {
        ppc_exception_handler(Except_Type::EXC_PROGRAM, 0x20000);
    }
}

void ppc_lhaux() {
    ppc_grab_regsdab();
    ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
    uint16_t val          = mem_grab_word(ppc_effective_address);
    if (val & 0x8000) {
        ppc_result_d = 0xFFFF0000UL | (uint32_t)val;
    } else {
        ppc_result_d = (uint32_t)val;
    }
    ppc_store_result_regd();
    ppc_result_a = ppc_effective_address;
    ppc_store_result_rega();
}

void ppc_lhax() {
    ppc_grab_regsdab();
    ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
    uint16_t val          = mem_grab_word(ppc_effective_address);
    if (val & 0x8000) {
        ppc_result_d = 0xFFFF0000UL | (uint32_t)val;
    } else {
        ppc_result_d = (uint32_t)val;
    }
    ppc_store_result_regd();
}

void ppc_lhbrx() {
    ppc_grab_regsdab();
    ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
    ppc_result_d          = (uint32_t)(BYTESWAP_16(mem_grab_word(ppc_effective_address)));
    ppc_store_result_regd();
}

void ppc_lwz() {
    ppc_grab_regsda();
    ppc_effective_address = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFF));
    ppc_effective_address += (reg_a > 0) ? ppc_result_a : 0;
    ppc_result_d = mem_grab_dword(ppc_effective_address);
    ppc_store_result_regd();
}

void ppc_lwbrx() {
    ppc_grab_regsdab();
    ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
    ppc_result_d          = BYTESWAP_32(mem_grab_dword(ppc_effective_address));
    ppc_store_result_regd();
}

void ppc_lwzu() {
    ppc_grab_regsda();
    ppc_effective_address = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFF));
    if ((reg_a != reg_d) || reg_a != 0) {
        ppc_effective_address += ppc_result_a;
        ppc_result_d = mem_grab_dword(ppc_effective_address);
        ppc_store_result_regd();
        ppc_result_a = ppc_effective_address;
        ppc_store_result_rega();
    } else {
        ppc_exception_handler(Except_Type::EXC_PROGRAM, 0x20000);
    }
}

void ppc_lwzx() {
    ppc_grab_regsdab();
    ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
    ppc_result_d          = mem_grab_dword(ppc_effective_address);
    ppc_store_result_regd();
}

void ppc_lwzux() {
    ppc_grab_regsdab();
    if ((reg_a != reg_d) || reg_a != 0) {
        ppc_effective_address = ppc_result_a + ppc_result_b;
    } else {
        ppc_exception_handler(Except_Type::EXC_PROGRAM, 0x20000);
    }
    ppc_result_d = mem_grab_dword(ppc_effective_address);
    ppc_result_a = ppc_effective_address;
    ppc_store_result_regd();
    ppc_store_result_rega();
}

void ppc_lwarx() {
    // Placeholder - Get the reservation of memory implemented!
    ppc_grab_regsdab();
    ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
    ppc_state.reserve     = true;
    ppc_result_d          = mem_grab_dword(ppc_effective_address);
    ppc_store_result_regd();
}

void ppc_lmw() {
    ppc_grab_regsda();
    ppc_effective_address = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFF));
    ppc_effective_address += (reg_a > 0) ? ppc_result_a : 0;
    // How many words to load in memory - using a do-while for this
    do {
        ppc_state.gpr[reg_d] = mem_grab_dword(ppc_effective_address);
        ppc_effective_address += 4;
        reg_d++;
    } while (reg_d < 32);
}

void ppc_lswi() {
    ppc_grab_regsda();
    ppc_effective_address = ppc_result_a;
    grab_inb              = (ppc_cur_instruction >> 11) & 31;
    grab_inb              = (grab_inb & 32) == 0 ? 32 : grab_inb;

    uint32_t shift_times = 0;

    while (grab_inb > 0) {
        switch (shift_times) {
        case 0:
            ppc_state.gpr[reg_d] = (ppc_result_d & 0x00FFFFFFUL) |
                (mem_grab_byte(ppc_effective_address) << 24);
            ppc_store_result_regd();
            break;
        case 1:
            ppc_result_d = (ppc_result_d & 0xFF00FFFFUL) |
                (mem_grab_byte(ppc_effective_address) << 16);
            ppc_store_result_regd();
            break;
        case 2:
            ppc_result_d = (ppc_result_d & 0xFFFF00FFUL) |
                (mem_grab_byte(ppc_effective_address) << 8);
            ppc_store_result_regd();
            break;
        case 3:
            ppc_result_d = (ppc_result_d & 0xFFFFFF00UL) | mem_grab_byte(ppc_effective_address);
            ppc_store_result_regd();
            break;
        default:
            LOG_F(ERROR, "Something really horrible happened with lswi. \n");
        }
        if (shift_times == 3) {
            shift_times = 0;
            reg_d       = (reg_d + 1) & 0x1F;
        } else {
            shift_times++;
        }
        ppc_effective_address++;
        grab_inb--;
    }
}

void ppc_lswx() {
    ppc_grab_regsdab();
    // Invalid instruction forms
    if ((ppc_result_d == 0) && (ppc_result_a == 0)) {
        ppc_exception_handler(Except_Type::EXC_PROGRAM, 0x100000);
    }
    if ((ppc_result_d == ppc_result_a) || (ppc_result_a == ppc_result_b)) {
        ppc_exception_handler(Except_Type::EXC_PROGRAM, 0x100000);
    }
    ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
    grab_inb              = ppc_state.spr[SPR::XER] & 127;
    uint32_t shift_times  = 0;
    while (grab_inb > 0) {
        switch (shift_times) {
        case 0:
            ppc_result_d = (ppc_result_d & 0x00FFFFFFUL) |
                (mem_grab_byte(ppc_effective_address) << 24);
            ppc_store_result_regd();
            break;
        case 1:
            ppc_result_d = (ppc_result_d & 0xFF00FFFFUL) |
                (mem_grab_byte(ppc_effective_address) << 16);
            ppc_store_result_regd();
            break;
        case 2:
            ppc_result_d = (ppc_result_d & 0xFFFF00FFUL) |
                (mem_grab_byte(ppc_effective_address) << 8);
            ppc_store_result_regd();
            break;
        case 3:
            ppc_result_d = (ppc_result_d & 0xFFFFFF00UL) | mem_grab_byte(ppc_effective_address);
            ppc_store_result_regd();
            break;
        default:
            LOG_F(ERROR, "Something really horrible happened with lswx. \n");
        }
        if (shift_times == 3) {
            shift_times = 0;
            reg_d       = (reg_d + 1) & 0x1F;
        } else {
            shift_times++;
        }
        ppc_effective_address++;
        grab_inb--;
    }
}

void ppc_stswi() {
    ppc_grab_regssa();
    ppc_effective_address = (reg_a == 0) ? 0 : ppc_result_a;
    grab_inb              = (ppc_cur_instruction >> 11) & 31;
    grab_inb              = (grab_inb & 32) == 0 ? 32 : grab_inb;
    uint32_t shift_times  = 0;
    while (grab_inb > 0) {
        switch (shift_times) {
        case 0:
            strwrd_replace_value = (ppc_result_d >> 24);
            mem_write_byte(ppc_effective_address, strwrd_replace_value);
            break;
        case 1:
            strwrd_replace_value = (ppc_result_d >> 16);
            mem_write_byte(ppc_effective_address, strwrd_replace_value);
            break;
        case 2:
            strwrd_replace_value = (ppc_result_d >> 8);
            mem_write_byte(ppc_effective_address, strwrd_replace_value);
            break;
        case 3:
            strwrd_replace_value = (ppc_result_d);
            mem_write_byte(ppc_effective_address, strwrd_replace_value);
            break;
        default:
            LOG_F(ERROR, "Something really horrible happened with stswi. \n");
        }
        if (shift_times == 3) {
            shift_times = 0;
            reg_s       = (reg_s + 1) & 0x1F;
        } else {
            shift_times++;
        }
        ppc_effective_address++;
        grab_inb--;
    }
}

void ppc_stswx() {
    ppc_grab_regssab();
    ppc_effective_address = (reg_a == 0) ? ppc_result_b : (ppc_result_a + ppc_result_b);
    grab_inb              = ppc_state.spr[SPR::XER] & 127;
    uint32_t shift_times  = 0;
    while (grab_inb > 0) {
        switch (shift_times) {
        case 0:
            strwrd_replace_value = (ppc_result_d >> 24);
            mem_write_byte(ppc_effective_address, strwrd_replace_value);
            break;
        case 1:
            strwrd_replace_value = (ppc_result_d >> 16);
            mem_write_byte(ppc_effective_address, strwrd_replace_value);
            break;
        case 2:
            strwrd_replace_value = (ppc_result_d >> 8);
            mem_write_byte(ppc_effective_address, strwrd_replace_value);
            break;
        case 3:
            strwrd_replace_value = (ppc_result_d);
            mem_write_byte(ppc_effective_address, strwrd_replace_value);
            break;
        default:
            LOG_F(ERROR, "Something really horrible happened with stswx. \n");
        }
        if (shift_times == 3) {
            shift_times = 0;
            reg_s       = (reg_s + 1) & 0x1F;
        } else {
            shift_times++;
        }
        ppc_effective_address++;
        grab_inb--;
    }
}

// TLB Instructions

void ppc_tlbie() {
#ifdef PROFILER
    supervisor_inst_num++;
#endif
    /* placeholder */
}

void ppc_tlbia() {
#ifdef PROFILER
    supervisor_inst_num++;
#endif
    /* placeholder */
}

void ppc_tlbld() {
#ifdef PROFILER
    supervisor_inst_num++;
#endif
    /* placeholder */
}

void ppc_tlbli() {
#ifdef PROFILER
    supervisor_inst_num++;
#endif
    /* placeholder */
}

void ppc_tlbsync() {
#ifdef PROFILER
    supervisor_inst_num++;
#endif
    /* placeholder */
}