dingusppc/cpu/ppc/ppcfpopcodes.cpp
2020-11-30 20:59:36 +01:00

1103 lines
33 KiB
C++

/*
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/>.
*/
// The opcodes for the processor - ppcopcodes.cpp
#include "ppcemu.h"
#include "ppcmmu.h"
#include <array>
#include <cfenv>
#include <cinttypes>
#include <cmath>
#include <iostream>
#include <limits>
#include <map>
#include <stdexcept>
#include <stdio.h>
#include <unordered_map>
// Used for FP calcs
uint64_t ppc_result64_a;
uint64_t ppc_result64_b;
uint64_t ppc_result64_c;
uint64_t ppc_result64_d;
double ppc_dblresult64_a;
double ppc_dblresult64_b;
double ppc_dblresult64_c;
double ppc_dblresult64_d;
double snan = std::numeric_limits<double>::signaling_NaN();
double qnan = std::numeric_limits<double>::quiet_NaN();
// Storage and register retrieval functions for the floating point functions.
double fp_return_double(uint32_t reg) {
return ppc_state.fpr[reg].dbl64_r;
}
uint64_t fp_return_uint64(uint32_t reg) {
return ppc_state.fpr[reg].int64_r;
}
void ppc_store_sfpresult(bool int_rep) {
if (int_rep) {
ppc_state.fpr[reg_d].int64_r = ppc_result64_d;
ppc_state.fpr[reg_d].dbl64_r = *(double*)&ppc_result64_d;
} else {
ppc_state.fpr[reg_d].dbl64_r = ppc_dblresult64_d;
ppc_state.fpr[reg_d].int64_r = *(uint64_t*)&ppc_dblresult64_d;
}
}
void ppc_store_dfpresult(bool int_rep) {
if (int_rep) {
ppc_state.fpr[reg_d].int64_r = ppc_result64_d;
ppc_state.fpr[reg_d].dbl64_r = *(double*)&ppc_result64_d;
} else {
ppc_state.fpr[reg_d].dbl64_r = ppc_dblresult64_d;
ppc_state.fpr[reg_d].int64_r = *(uint64_t*)&ppc_dblresult64_d;
}
}
void ppc_grab_regsfpdb(bool int_rep) {
reg_d = (ppc_cur_instruction >> 21) & 31;
reg_b = (ppc_cur_instruction >> 11) & 31;
if (int_rep) {
ppc_result64_b = ppc_state.fpr[reg_b].int64_r;
} else {
ppc_dblresult64_b = ppc_state.fpr[reg_b].dbl64_r;
}
}
void ppc_grab_regsfpdiab(bool int_rep) {
reg_d = (ppc_cur_instruction >> 21) & 31;
reg_a = (ppc_cur_instruction >> 16) & 31;
reg_b = (ppc_cur_instruction >> 11) & 31;
if (int_rep == true) {
}
ppc_result_a = ppc_state.gpr[reg_a];
ppc_result_b = ppc_state.gpr[reg_b];
}
void ppc_grab_regsfpdia(bool int_rep) {
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_regsfpsia(bool int_rep) {
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_regsfpsiab(bool int_rep) {
reg_s = (ppc_cur_instruction >> 21) & 31;
reg_a = (ppc_cur_instruction >> 16) & 31;
reg_b = (ppc_cur_instruction >> 11) & 31;
ppc_result64_d = ppc_state.fpr[reg_s].int64_r;
ppc_result_a = ppc_state.gpr[reg_a];
ppc_result_b = ppc_state.gpr[reg_b];
}
void ppc_grab_regsfpsab(bool int_rep) {
reg_s = (ppc_cur_instruction >> 21) & 31;
reg_a = (ppc_cur_instruction >> 16) & 31;
reg_b = (ppc_cur_instruction >> 11) & 31;
if (int_rep) {
ppc_result64_d = ppc_state.fpr[reg_s].int64_r;
ppc_result64_a = ppc_state.fpr[reg_a].int64_r;
ppc_result64_b = ppc_state.fpr[reg_b].int64_r;
} else {
ppc_dblresult64_d = fp_return_double(reg_s);
ppc_dblresult64_a = fp_return_double(reg_a);
ppc_dblresult64_c = fp_return_double(reg_c);
}
}
void ppc_grab_regsfpdab(bool int_rep) {
reg_d = (ppc_cur_instruction >> 21) & 31;
reg_a = (ppc_cur_instruction >> 16) & 31;
reg_b = (ppc_cur_instruction >> 11) & 31;
if (int_rep) {
ppc_result64_a = fp_return_uint64(reg_a);
ppc_result64_b = fp_return_uint64(reg_b);
} else {
ppc_dblresult64_a = fp_return_double(reg_a);
ppc_dblresult64_b = fp_return_double(reg_b);
}
}
void ppc_grab_regsfpdac(bool int_rep) {
reg_d = (ppc_cur_instruction >> 21) & 31;
reg_a = (ppc_cur_instruction >> 16) & 31;
reg_c = (ppc_cur_instruction >> 6) & 31;
if (int_rep) {
ppc_result64_a = fp_return_uint64(reg_a);
ppc_result64_c = fp_return_uint64(reg_c);
} else {
ppc_dblresult64_a = fp_return_double(reg_a);
ppc_dblresult64_c = fp_return_double(reg_c);
}
}
void ppc_grab_regsfpdabc(bool int_rep) {
reg_d = (ppc_cur_instruction >> 21) & 31;
reg_a = (ppc_cur_instruction >> 16) & 31;
reg_b = (ppc_cur_instruction >> 11) & 31;
reg_c = (ppc_cur_instruction >> 6) & 31;
if (int_rep) {
ppc_result64_a = fp_return_uint64(reg_a);
ppc_result64_b = fp_return_uint64(reg_b);
ppc_result64_c = fp_return_uint64(reg_c);
} else {
ppc_dblresult64_a = fp_return_double(reg_a);
ppc_dblresult64_b = fp_return_double(reg_b);
ppc_dblresult64_c = fp_return_double(reg_c);
}
}
void fp_save_float(float entry) {
ppc_state.fpr[reg_d].dbl64_r = (double)entry;
ppc_state.fpr[reg_d].int64_r = (uint64_t)entry;
}
void fp_save_double(double entry) {
ppc_state.fpr[reg_d].dbl64_r = entry;
ppc_state.fpr[reg_d].int64_r = *(uint64_t*)&entry;
}
void fp_save_uint64(uint64_t entry) {
ppc_state.fpr[reg_d].int64_r = entry;
ppc_state.fpr[reg_d].dbl64_r = (double)entry;
}
void fp_save_uint32(uint32_t entry) {
ppc_state.fpr[reg_d].int64_r = entry;
ppc_state.fpr[reg_d].dbl64_r = (double)entry;
}
void ppc_fp_changecrf1() {
ppc_state.fpscr |= 0xf0000000;
}
void ppc_divbyzero(uint64_t input_a, uint64_t input_b, bool is_single) {
if (input_b == 0) {
ppc_state.fpscr |= 0x84000000;
if (input_a == 0) {
ppc_state.fpscr |= 0x200000;
}
}
}
int64_t round_to_nearest(double f) {
if (f >= 0.0) {
return (int32_t)(int64_t)(f + 0.5);
} else {
return (int32_t)(-(int64_t)(-f + 0.5));
}
}
int64_t round_to_zero(double f) {
return (int32_t)(f);
}
int64_t round_to_pos_inf(double f) {
return (int32_t)(ceil(f));
}
int64_t round_to_neg_inf(double f) {
return (int32_t)(floor(f));
}
void ppc_toggle_fpscr_fex() {
bool fex_result = ((ppc_state.fpscr & 0x20000000) & (ppc_state.fpscr & 0x80));
fex_result |= ((ppc_state.fpscr & 0x10000000) & (ppc_state.fpscr & 0x40));
fex_result |= ((ppc_state.fpscr & 0x8000000) & (ppc_state.fpscr & 0x20));
fex_result |= ((ppc_state.fpscr & 0x4000000) & (ppc_state.fpscr & 0x10));
fex_result |= ((ppc_state.fpscr & 0x2000000) & (ppc_state.fpscr & 0x8));
ppc_state.fpscr |= (fex_result << 30);
}
bool ppc_confirm_inf_nan(uint32_t chosen_reg_1, uint32_t chosen_reg_2, bool is_single, uint32_t op) {
uint64_t input_a = ppc_state.fpr[chosen_reg_1].int64_r;
uint64_t input_b = ppc_state.fpr[chosen_reg_2].int64_r;
if (is_single) {
uint32_t exp_a = (input_a >> 23) & 0xff;
uint32_t exp_b = (input_b >> 23) & 0xff;
ppc_state.fpscr &= 0x7fbfffff;
switch (op) {
case 36:
if ((exp_a == 0xff) & (exp_b == 0xff)) {
ppc_state.fpscr |= 0x80400000;
ppc_toggle_fpscr_fex();
return true;
} else if ((input_a == 0) & (input_b == 0)) {
ppc_state.fpscr |= 0x80200000;
ppc_toggle_fpscr_fex();
return true;
}
break;
case 40:
if ((exp_a == 0xff) & (exp_b == 0xff)) {
ppc_state.fpscr |= 0x80800000;
ppc_toggle_fpscr_fex();
return true;
}
break;
case 50:
if (((exp_a == 0xff) & (input_b == 0)) | ((exp_b == 0xff) & (input_a == 0))) {
ppc_state.fpscr |= 0x80100000;
ppc_toggle_fpscr_fex();
return true;
}
break;
case 56:
case 58:
if ((exp_a == 0xff) & (exp_b == 0xff)) {
ppc_state.fpscr |= 0x80800000;
ppc_toggle_fpscr_fex();
return true;
}
break;
default:
return false;
}
} else {
uint32_t exp_a = (input_a >> 52) & 0x7ff;
uint32_t exp_b = (input_b >> 52) & 0x7ff;
ppc_state.fpscr &= 0x7fbfffff;
switch (op) {
case 36:
if ((exp_a == 0x7ff) & (exp_b == 0x7ff)) {
ppc_state.fpscr |= 0x80400000;
ppc_toggle_fpscr_fex();
return true;
} else if ((input_a == 0) & (input_b == 0)) {
ppc_state.fpscr |= 0x80200000;
ppc_toggle_fpscr_fex();
return true;
}
break;
case 40:
if ((exp_a == 0x7ff) & (exp_b == 0x7ff)) {
ppc_state.fpscr |= 0x80800000;
ppc_toggle_fpscr_fex();
return true;
}
break;
case 50:
if (((exp_a == 0x7ff) & (input_b == 0)) | ((exp_b == 0x7ff) & (input_a == 0))) {
ppc_state.fpscr |= 0x80100000;
ppc_toggle_fpscr_fex();
return true;
}
break;
case 56:
case 58:
if ((exp_a == 0xff) & (exp_b == 0xff)) {
ppc_state.fpscr |= 0x80800000;
ppc_toggle_fpscr_fex();
return true;
}
break;
default:
return false;
}
}
return false;
}
void fpresult_update(uint64_t set_result, bool confirm_arc) {
bool confirm_ov = (bool)std::fetestexcept(FE_OVERFLOW);
if (confirm_ov) {
ppc_state.fpscr |= 0x80001000;
}
if (confirm_arc) {
ppc_state.fpscr |= 0x80010000;
ppc_state.fpscr &= 0xFFFF0FFF;
if (set_result == 0) {
ppc_state.fpscr |= 0x2000;
} else {
if (set_result < 0) {
ppc_state.fpscr |= 0x8000;
} else if (set_result > 0) {
ppc_state.fpscr |= 0x4000;
} else {
ppc_state.fpscr |= 0x1000;
}
}
}
}
void ppc_frsqrte_result() {
if (ppc_result64_d & 0x007FF000000000000UL) {
}
}
void ppc_changecrf1() {
ppc_state.cr &= 0xF0FFFFFF;
ppc_state.cr |= (ppc_state.fpscr & 0xF0000000) >> 4;
}
// Floating Point Arithmetic
void dppc_interpreter::ppc_fadd() {
ppc_grab_regsfpdab(false);
if (!ppc_confirm_inf_nan(reg_a, reg_b, false, 58)) {
ppc_dblresult64_d = ppc_dblresult64_a + ppc_dblresult64_b;
ppc_store_dfpresult(false);
}
if (rc_flag)
ppc_changecrf1();
}
void dppc_interpreter::ppc_fsub() {
ppc_grab_regsfpdab(false);
if (!ppc_confirm_inf_nan(reg_a, reg_b, false, 56)) {
ppc_dblresult64_d = ppc_dblresult64_a - ppc_dblresult64_b;
ppc_store_dfpresult(false);
}
if (rc_flag)
ppc_changecrf1();
}
void dppc_interpreter::ppc_fdiv() {
ppc_grab_regsfpdab(false);
if (!ppc_confirm_inf_nan(reg_a, reg_b, false, 36)) {
ppc_dblresult64_d = ppc_dblresult64_a / ppc_dblresult64_b;
ppc_store_dfpresult(false);
}
if (rc_flag)
ppc_changecrf1();
}
void dppc_interpreter::ppc_fmult() {
ppc_grab_regsfpdac(false);
if (!ppc_confirm_inf_nan(reg_a, reg_b, false, 50)) {
ppc_dblresult64_d = ppc_dblresult64_a * ppc_dblresult64_b;
ppc_store_dfpresult(false);
}
if (rc_flag)
ppc_changecrf1();
}
void dppc_interpreter::ppc_fmadd() {
ppc_grab_regsfpdabc(false);
if (!ppc_confirm_inf_nan(reg_a, reg_c, false, 50)) {
ppc_dblresult64_d = (ppc_dblresult64_a * ppc_dblresult64_c);
if (!ppc_confirm_inf_nan(reg_a, reg_b, false, 58)) {
ppc_dblresult64_d += ppc_dblresult64_b;
}
}
ppc_store_dfpresult(false);
if (rc_flag)
ppc_changecrf1();
}
void dppc_interpreter::ppc_fmsub() {
ppc_grab_regsfpdabc(false);
if (!ppc_confirm_inf_nan(reg_a, reg_c, false, 50)) {
ppc_dblresult64_d = (ppc_dblresult64_a * ppc_dblresult64_c);
if (!ppc_confirm_inf_nan(reg_d, reg_b, false, 56)) {
ppc_dblresult64_d -= ppc_dblresult64_b;
}
}
ppc_store_dfpresult(false);
if (rc_flag)
ppc_changecrf1();
}
void dppc_interpreter::ppc_fnmadd() {
ppc_grab_regsfpdabc(false);
if (!ppc_confirm_inf_nan(reg_a, reg_c, false, 50)) {
ppc_dblresult64_d = (ppc_dblresult64_a * ppc_dblresult64_c);
if (!ppc_confirm_inf_nan(reg_a, reg_b, false, 58)) {
ppc_dblresult64_d += ppc_dblresult64_b;
}
}
ppc_dblresult64_d = -ppc_dblresult64_d;
ppc_store_dfpresult(false);
if (rc_flag)
ppc_changecrf1();
}
void dppc_interpreter::ppc_fnmsub() {
ppc_grab_regsfpdabc(false);
if (!ppc_confirm_inf_nan(reg_a, reg_c, false, 50)) {
ppc_dblresult64_d = (ppc_dblresult64_a * ppc_dblresult64_c);
if (!ppc_confirm_inf_nan(reg_d, reg_b, false, 56)) {
ppc_dblresult64_d -= ppc_dblresult64_b;
}
}
ppc_dblresult64_d = -ppc_dblresult64_d;
ppc_store_dfpresult(false);
if (rc_flag)
ppc_changecrf1();
}
void dppc_interpreter::ppc_fadds() {
ppc_grab_regsfpdab(false);
if (!ppc_confirm_inf_nan(reg_a, reg_b, true, 58)) {
float intermediate = (float)ppc_dblresult64_a + (float)ppc_dblresult64_b;
ppc_dblresult64_d = static_cast<double>(intermediate);
ppc_store_dfpresult(false);
}
if (rc_flag)
ppc_changecrf1();
}
void dppc_interpreter::ppc_fsubs() {
ppc_grab_regsfpdab(false);
if (!ppc_confirm_inf_nan(reg_a, reg_b, true, 56)) {
float intermediate = (float)ppc_dblresult64_a - (float)ppc_dblresult64_b;
ppc_dblresult64_d = static_cast<double>(intermediate);
ppc_store_dfpresult(false);
}
if (rc_flag)
ppc_changecrf1();
}
void dppc_interpreter::ppc_fmults() {
ppc_grab_regsfpdac(false);
if (!ppc_confirm_inf_nan(reg_a, reg_b, true, 50)) {
float intermediate = (float)ppc_dblresult64_a * (float)ppc_dblresult64_b;
ppc_dblresult64_d = static_cast<double>(intermediate);
ppc_store_dfpresult(false);
}
if (rc_flag)
ppc_changecrf1();
}
void dppc_interpreter::ppc_fdivs() {
ppc_grab_regsfpdab(false);
if (!ppc_confirm_inf_nan(reg_a, reg_b, true, 36)) {
float intermediate = (float)ppc_dblresult64_a / (float)ppc_dblresult64_b;
ppc_dblresult64_d = static_cast<double>(intermediate);
ppc_store_dfpresult(false);
}
if (rc_flag)
ppc_changecrf1();
}
void dppc_interpreter::ppc_fmadds() {
ppc_grab_regsfpdabc(false);
float intermediate;
if (!ppc_confirm_inf_nan(reg_a, reg_b, true, 58)) {
intermediate = (float)ppc_dblresult64_a * (float)ppc_dblresult64_c;
if (!ppc_confirm_inf_nan(reg_a, reg_b, true, 58)) {
intermediate += (float)ppc_dblresult64_b;
ppc_dblresult64_d = static_cast<double>(intermediate);
ppc_store_dfpresult(false);
}
}
if (rc_flag)
ppc_changecrf1();
}
void dppc_interpreter::ppc_fmsubs() {
ppc_grab_regsfpdabc(false);
float intermediate;
if (!ppc_confirm_inf_nan(reg_a, reg_c, false, 50)) {
intermediate = (float)ppc_dblresult64_a * (float)ppc_dblresult64_c;
if (!ppc_confirm_inf_nan(reg_d, reg_b, false, 56)) {
intermediate -= (float)ppc_dblresult64_b;
ppc_dblresult64_d = static_cast<double>(intermediate);
ppc_store_dfpresult(false);
}
}
if (rc_flag)
ppc_changecrf1();
}
void dppc_interpreter::ppc_fnmadds() {
ppc_grab_regsfpdabc(false);
float intermediate;
if (!ppc_confirm_inf_nan(reg_a, reg_b, true, 58)) {
intermediate = (float)ppc_dblresult64_a * (float)ppc_dblresult64_c;
if (!ppc_confirm_inf_nan(reg_a, reg_b, true, 58)) {
intermediate += (float)ppc_dblresult64_b;
intermediate = -intermediate;
ppc_dblresult64_d = static_cast<double>(intermediate);
ppc_store_dfpresult(false);
}
}
if (rc_flag)
ppc_changecrf1();
}
void dppc_interpreter::ppc_fnmsubs() {
ppc_grab_regsfpdabc(false);
float intermediate;
if (!ppc_confirm_inf_nan(reg_a, reg_c, false, 50)) {
intermediate = (float)ppc_dblresult64_a * (float)ppc_dblresult64_c;
if (!ppc_confirm_inf_nan(reg_d, reg_b, false, 56)) {
intermediate -= (float)ppc_dblresult64_b;
intermediate = -intermediate;
ppc_dblresult64_d = static_cast<double>(intermediate);
ppc_store_dfpresult(false);
}
}
if (rc_flag)
ppc_changecrf1();
}
void dppc_interpreter::ppc_fabs() {
ppc_grab_regsfpdb(false);
ppc_dblresult64_d = abs(ppc_dblresult64_b);
ppc_store_dfpresult(false);
if (rc_flag)
ppc_changecrf1();
}
void dppc_interpreter::ppc_fnabs() {
ppc_grab_regsfpdb(false);
ppc_dblresult64_d = abs(ppc_dblresult64_b);
ppc_dblresult64_d = -ppc_dblresult64_d;
ppc_store_dfpresult(false);
if (rc_flag)
ppc_changecrf1();
}
void dppc_interpreter::ppc_fneg() {
ppc_grab_regsfpdb(false);
ppc_dblresult64_d = -ppc_dblresult64_d;
ppc_store_dfpresult(false);
if (rc_flag)
ppc_changecrf1();
}
void dppc_interpreter::ppc_fsel() {
ppc_grab_regsfpdabc(false);
if (ppc_dblresult64_a >= 0.0) {
ppc_dblresult64_d = ppc_dblresult64_c;
} else {
ppc_dblresult64_d = ppc_dblresult64_b;
}
ppc_store_dfpresult(false);
if (rc_flag)
ppc_changecrf1();
}
void dppc_interpreter::ppc_fsqrt() {
ppc_grab_regsfpdb(false);
ppc_dblresult64_d = std::sqrt(ppc_dblresult64_b);
ppc_store_dfpresult(false);
if (rc_flag)
ppc_changecrf1();
}
void dppc_interpreter::ppc_fsqrts() {
ppc_grab_regsfpdb(true);
uint32_t test = (uint32_t)ppc_result64_b;
test += 127 << 23;
test >>= 1;
uint64_t* pre_final = (uint64_t*)&test;
ppc_result64_d = *pre_final;
ppc_store_dfpresult(true);
if (rc_flag)
ppc_changecrf1();
}
void dppc_interpreter::ppc_frsqrte() {
ppc_grab_regsfpdb(false);
double testd2 = (double)ppc_result64_b;
for (int i = 0; i < 10; i++) {
testd2 = testd2 * (1.5 - (testd2 * .5) * testd2 * testd2);
}
ppc_dblresult64_d = testd2;
ppc_store_dfpresult(false);
if (rc_flag)
ppc_changecrf1();
}
void dppc_interpreter::ppc_frsp() {
ppc_grab_regsfpdb(false);
double testd2 = (double)ppc_result64_b;
float testf2 = (float)testd2;
ppc_dblresult64_d = (double)testf2;
ppc_store_dfpresult(false);
if (rc_flag)
ppc_changecrf1();
}
void dppc_interpreter::ppc_fres() {
ppc_grab_regsfpdb(false);
float testf2 = (float)ppc_dblresult64_b;
testf2 = 1 / testf2;
ppc_dblresult64_d = (double)testf2;
ppc_store_dfpresult(false);
if (rc_flag)
ppc_changecrf1();
}
void dppc_interpreter::ppc_fctiw() {
ppc_grab_regsfpdb(false);
switch (ppc_state.fpscr & 0x3) {
case 0:
ppc_result64_d = round_to_nearest(ppc_dblresult64_b);
case 1:
ppc_result64_d = round_to_zero(ppc_dblresult64_b);
case 2:
ppc_result64_d = round_to_pos_inf(ppc_dblresult64_b);
case 3:
ppc_result64_d = round_to_neg_inf(ppc_dblresult64_b);
}
ppc_store_dfpresult(true);
if (rc_flag)
ppc_changecrf1();
}
void dppc_interpreter::ppc_fctiwz() {
ppc_grab_regsfpdb(false);
ppc_result64_d = round_to_zero(ppc_dblresult64_b);
ppc_store_result_regd();
if (rc_flag)
ppc_changecrf1();
}
// Floating Point Store and Load
void dppc_interpreter::ppc_lfs() {
ppc_grab_regsfpdia(true);
ppc_effective_address = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFF));
ppc_effective_address += (reg_a > 0) ? ppc_result_a : 0;
ppc_result64_d = mem_grab_dword(ppc_effective_address);
ppc_store_dfpresult(true);
}
void dppc_interpreter::ppc_lfsu() {
ppc_grab_regsfpdia(true);
if (reg_a != 0) {
ppc_effective_address = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFF));
ppc_effective_address += (reg_a > 0) ? ppc_result_a : 0;
ppc_result64_d = mem_grab_dword(ppc_effective_address);
ppc_result_a = ppc_effective_address;
ppc_store_dfpresult(true);
ppc_store_result_rega();
} else {
ppc_exception_handler(Except_Type::EXC_PROGRAM, Exc_Cause::ILLEGAL_OP);
}
}
void dppc_interpreter::ppc_lfsx() {
ppc_grab_regsfpdiab(true);
ppc_effective_address = (reg_a == 0) ? ppc_result_b : ppc_result_a + ppc_result_b;
ppc_result64_d = mem_grab_dword(ppc_effective_address);
ppc_store_dfpresult(true);
}
void dppc_interpreter::ppc_lfsux() {
ppc_grab_regsfpdiab(true);
if (reg_a != 0) {
ppc_effective_address = ppc_result_a + ppc_result_b;
ppc_result64_d = mem_grab_dword(ppc_effective_address);
ppc_result_a = ppc_effective_address;
ppc_store_dfpresult(true);
ppc_store_result_rega();
} else {
ppc_exception_handler(Except_Type::EXC_PROGRAM, Exc_Cause::ILLEGAL_OP);
}
}
void dppc_interpreter::ppc_lfd() {
ppc_grab_regsfpdia(true);
ppc_effective_address = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFF));
ppc_effective_address += (reg_a > 0) ? ppc_result_a : 0;
ppc_result64_d = mem_grab_qword(ppc_effective_address);
ppc_store_dfpresult(true);
}
void dppc_interpreter::ppc_lfdu() {
ppc_grab_regsfpdia(true);
if (reg_a != 0) {
ppc_effective_address = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFF));
ppc_effective_address += ppc_result_a;
ppc_result64_d = mem_grab_qword(ppc_effective_address);
ppc_store_dfpresult(true);
ppc_result_a = ppc_effective_address;
ppc_store_result_rega();
} else {
ppc_exception_handler(Except_Type::EXC_PROGRAM, Exc_Cause::ILLEGAL_OP);
}
}
void dppc_interpreter::ppc_lfdx() {
ppc_grab_regsfpdia(true);
ppc_effective_address = (reg_a > 0) ? ppc_result_a + ppc_result_b : ppc_result_b;
ppc_result64_d = mem_grab_qword(ppc_effective_address);
ppc_store_dfpresult(true);
}
void dppc_interpreter::ppc_lfdux() {
ppc_grab_regsfpdiab(true);
if (reg_a != 0) {
ppc_effective_address = ppc_result_a + ppc_result_b;
ppc_result64_d = mem_grab_qword(ppc_effective_address);
ppc_store_dfpresult(true);
ppc_result_a = ppc_effective_address;
ppc_store_result_rega();
} else {
ppc_exception_handler(Except_Type::EXC_PROGRAM, Exc_Cause::ILLEGAL_OP);
}
}
void dppc_interpreter::ppc_stfs() {
ppc_grab_regsfpsia(true);
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, uint32_t(ppc_state.fpr[reg_s].int64_r));
}
void dppc_interpreter::ppc_stfsu() {
ppc_grab_regsfpsia(true);
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, uint32_t(ppc_state.fpr[reg_s].int64_r));
ppc_result_a = ppc_effective_address;
ppc_store_result_rega();
} else {
ppc_exception_handler(Except_Type::EXC_PROGRAM, Exc_Cause::ILLEGAL_OP);
}
}
void dppc_interpreter::ppc_stfsx() {
ppc_grab_regsfpsiab(true);
ppc_effective_address = (reg_a == 0) ? ppc_result_b : ppc_result_a + ppc_result_b;
mem_write_dword(ppc_effective_address, uint32_t(ppc_state.fpr[reg_s].int64_r));
}
void dppc_interpreter::ppc_stfsux() {
ppc_grab_regsfpsiab(true);
if (reg_a != 0) {
ppc_effective_address = ppc_result_a + ppc_result_b;
mem_write_dword(ppc_effective_address, uint32_t(ppc_state.fpr[reg_s].int64_r));
ppc_result_a = ppc_effective_address;
ppc_store_result_rega();
} else {
ppc_exception_handler(Except_Type::EXC_PROGRAM, Exc_Cause::ILLEGAL_OP);
}
}
void dppc_interpreter::ppc_stfd() {
ppc_grab_regsfpsia(true);
ppc_effective_address = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFF));
ppc_effective_address += (reg_a > 0) ? ppc_result_a : 0;
mem_write_qword(ppc_effective_address, ppc_state.fpr[reg_s].int64_r);
}
void dppc_interpreter::ppc_stfdu() {
ppc_grab_regsfpsia(true);
if (reg_a != 0) {
ppc_effective_address = (int32_t)((int16_t)(ppc_cur_instruction & 0xFFFF));
ppc_effective_address += ppc_result_a;
mem_write_qword(ppc_effective_address, ppc_state.fpr[reg_s].int64_r);
ppc_result_a = ppc_effective_address;
ppc_store_result_rega();
} else {
ppc_exception_handler(Except_Type::EXC_PROGRAM, Exc_Cause::ILLEGAL_OP);
}
}
void dppc_interpreter::ppc_stfdx() {
ppc_grab_regsfpsiab(true);
ppc_effective_address = (reg_a == 0) ? ppc_result_b : ppc_result_a + ppc_result_b;
mem_write_qword(ppc_effective_address, ppc_state.fpr[reg_s].int64_r);
}
void dppc_interpreter::ppc_stfdux() {
ppc_grab_regsfpsiab(true);
if (reg_a != 0) {
ppc_effective_address = ppc_result_a + ppc_result_b;
mem_write_qword(ppc_effective_address, ppc_state.fpr[reg_s].int64_r);
ppc_result_a = ppc_effective_address;
ppc_store_result_rega();
} else {
ppc_exception_handler(Except_Type::EXC_PROGRAM, Exc_Cause::ILLEGAL_OP);
}
}
void dppc_interpreter::ppc_stfiwx() {
ppc_grab_regsfpsiab(true);
ppc_effective_address = (reg_a == 0) ? ppc_result_b : ppc_result_a + ppc_result_b;
mem_write_dword(ppc_effective_address, (uint32_t)(ppc_state.fpr[reg_s].int64_r));
}
// Floating Point Register Transfer
void dppc_interpreter::ppc_fmr() {
ppc_grab_regsfpdb(true);
ppc_state.fpr[reg_d] = ppc_state.fpr[reg_b];
ppc_store_dfpresult(true);
}
void dppc_interpreter::ppc_mffs() {
ppc_grab_regsda();
uint64_t fpstore1 = ppc_state.fpr[reg_d].int64_r & 0xFFFFFFFF00000000;
uint64_t fpstore2 = ppc_state.fpscr & 0x00000000FFFFFFFF;
fpstore1 |= fpstore2;
fp_save_uint64(fpstore1);
}
void dppc_interpreter::ppc_mffsdot() {
ppc_grab_regsda();
uint64_t fpstore1 = ppc_state.fpr[reg_d].int64_r & 0xFFFFFFFF00000000;
uint64_t fpstore2 = ppc_state.fpscr & 0x00000000FFFFFFFF;
fpstore1 |= fpstore2;
fp_save_uint64(fpstore1);
ppc_fp_changecrf1();
}
void dppc_interpreter::ppc_mtfsf() {
reg_b = (ppc_cur_instruction >> 11) & 31;
uint32_t fm_mask = (ppc_cur_instruction >> 17) & 255;
crm += ((fm_mask & 1) == 1) ? 0xF0000000 : 0x00000000;
crm += (((fm_mask >> 1) & 1) == 1) ? 0x0F000000 : 0x00000000;
crm += (((fm_mask >> 2) & 1) == 1) ? 0x00F00000 : 0x00000000;
crm += (((fm_mask >> 3) & 1) == 1) ? 0x000F0000 : 0x00000000;
crm += (((fm_mask >> 4) & 1) == 1) ? 0x0000F000 : 0x00000000;
crm += (((fm_mask >> 5) & 1) == 1) ? 0x00000F00 : 0x00000000;
crm += (((fm_mask >> 6) & 1) == 1) ? 0x000000F0 : 0x00000000;
crm += (((fm_mask >> 7) & 1) == 1) ? 0x0000000F : 0x00000000;
uint32_t quickfprval = (uint32_t)ppc_state.fpr[reg_b].int64_r;
ppc_state.fpscr = (quickfprval & crm) | (quickfprval & ~(crm));
}
void dppc_interpreter::ppc_mtfsfdot() {
reg_b = (ppc_cur_instruction >> 11) & 31;
uint32_t fm_mask = (ppc_cur_instruction >> 17) & 255;
crm += ((fm_mask & 1) == 1) ? 0xF0000000 : 0x00000000;
crm += (((fm_mask >> 1) & 1) == 1) ? 0x0F000000 : 0x00000000;
crm += (((fm_mask >> 2) & 1) == 1) ? 0x00F00000 : 0x00000000;
crm += (((fm_mask >> 3) & 1) == 1) ? 0x000F0000 : 0x00000000;
crm += (((fm_mask >> 4) & 1) == 1) ? 0x0000F000 : 0x00000000;
crm += (((fm_mask >> 5) & 1) == 1) ? 0x00000F00 : 0x00000000;
crm += (((fm_mask >> 6) & 1) == 1) ? 0x000000F0 : 0x00000000;
crm += (((fm_mask >> 7) & 1) == 1) ? 0x0000000F : 0x00000000;
uint32_t quickfprval = (uint32_t)ppc_state.fpr[reg_b].int64_r;
ppc_state.fpscr = (quickfprval & crm) | (quickfprval & ~(crm));
ppc_fp_changecrf1();
}
void dppc_interpreter::ppc_mtfsfi() {
ppc_result_b = (ppc_cur_instruction >> 11) & 15;
crf_d = (ppc_cur_instruction >> 23) & 7;
crf_d = crf_d << 2;
ppc_state.fpscr = (ppc_state.cr & ~(0xF0000000UL >> crf_d)) |
((ppc_state.spr[SPR::XER] & 0xF0000000UL) >> crf_d);
}
void dppc_interpreter::ppc_mtfsfidot() {
ppc_result_b = (ppc_cur_instruction >> 11) & 15;
crf_d = (ppc_cur_instruction >> 23) & 7;
crf_d = crf_d << 2;
ppc_state.fpscr = (ppc_state.cr & ~(0xF0000000UL >> crf_d)) |
((ppc_state.spr[SPR::XER] & 0xF0000000UL) >> crf_d);
ppc_fp_changecrf1();
}
void dppc_interpreter::ppc_mtfsb0() {
crf_d = (ppc_cur_instruction >> 21) & 0x31;
if ((crf_d == 0) || (crf_d > 2)) {
ppc_state.fpscr &= ~(1 << (31 - crf_d));
}
}
void dppc_interpreter::ppc_mtfsb0dot() {
crf_d = (ppc_cur_instruction >> 21) & 0x31;
if ((crf_d == 0) || (crf_d > 2)) {
ppc_state.fpscr &= ~(1 << crf_d);
}
ppc_fp_changecrf1();
}
void dppc_interpreter::ppc_mtfsb1() {
crf_d = (ppc_cur_instruction >> 21) & 0x31;
if ((crf_d == 0) || (crf_d > 2)) {
ppc_state.fpscr |= (1 << crf_d);
}
}
void dppc_interpreter::ppc_mtfsb1dot() {
crf_d = ~(ppc_cur_instruction >> 21) & 0x31;
if ((crf_d == 0) || (crf_d > 2)) {
ppc_state.fpscr |= (1 << crf_d);
}
ppc_fp_changecrf1();
}
void dppc_interpreter::ppc_mcrfs() {
crf_d = (ppc_cur_instruction >> 23) & 7;
crf_d = crf_d << 2;
crf_s = (ppc_cur_instruction >> 18) & 7;
crf_s = crf_d << 2;
ppc_state.cr = ~(ppc_state.cr & ((15 << (28 - crf_d)))) &
(ppc_state.fpscr & (15 << (28 - crf_s)));
}
// Floating Point Comparisons
void dppc_interpreter::ppc_fcmpo() {
ppc_grab_regsfpsab(true);
crf_d = (ppc_cur_instruction >> 23) & 7;
crf_d = crf_d << 2;
double db_test_a = (double)ppc_result64_a;
double db_test_b = (double)ppc_result64_b;
ppc_state.fpscr &= 0xFFFF0FFF;
if (std::isnan(db_test_a) || std::isnan(db_test_b)) {
cmp_c |= 0x01;
} else if (db_test_a < db_test_b) {
cmp_c |= 0x08;
} else if (db_test_a > db_test_b) {
cmp_c |= 0x04;
} else {
cmp_c |= 0x02;
}
ppc_state.fpscr |= (cmp_c << 12);
ppc_state.cr = ((ppc_state.cr & ~(0xf0000000 >> crf_d)) | ((cmp_c + xercon) >> crf_d));
if ((db_test_a == snan) || (db_test_b == snan)) {
ppc_state.fpscr |= 0x1000000;
if (ppc_state.fpscr & 0x80) {
ppc_state.fpscr |= 0x80000;
}
} else if ((db_test_a == qnan) || (db_test_b == qnan)) {
ppc_state.fpscr |= 0x80000;
}
}
void dppc_interpreter::ppc_fcmpu() {
ppc_grab_regsfpsab(true);
crf_d = (ppc_cur_instruction >> 23) & 7;
crf_d = crf_d << 2;
double db_test_a = (double)ppc_result64_a;
double db_test_b = (double)ppc_result64_b;
ppc_state.fpscr &= 0xFFFF0FFF;
if (std::isnan(db_test_a) || std::isnan(db_test_b)) {
cmp_c |= 0x01;
} else if (db_test_a < db_test_b) {
cmp_c |= 0x08;
} else if (db_test_a > db_test_b) {
cmp_c |= 0x04;
} else {
cmp_c |= 0x02;
}
ppc_state.fpscr |= (cmp_c << 12);
ppc_state.cr = ((ppc_state.cr & ~(0xf0000000 >> crf_d)) | ((cmp_c + xercon) >> crf_d));
if ((db_test_a == snan) || (db_test_b == snan)) {
ppc_state.fpscr |= 0x1000000;
}
}