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https://github.com/liuk7071/ChonkyStation.git
synced 2024-05-20 04:50:47 -04:00
[CPU] Many fixes
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2fb4c68e87
commit
c9e13e0b33
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@ -1,8 +1,8 @@
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#include "interpreter.hpp"
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#define DONT_CRASH_ON_BAD_READWRITE
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#define DONT_CRASH_ON_BAD_JUMP
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//#define DONT_CRASH_ON_BAD_READWRITE
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//#define DONT_CRASH_ON_BAD_JUMP
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void Interpreter::step(CpuCore* core, Memory* mem, Disassembler* disassembler) {
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// Handle interrupts
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@ -61,6 +61,7 @@ void Interpreter::step(CpuCore* core, Memory* mem, Disassembler* disassembler) {
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#ifndef DONT_CRASH_ON_BAD_JUMP
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Helpers::panic("Bad JR addr\n");
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#else
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core->exception(CpuCore::Exception::BadFetchAddr, true);
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break;
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#endif
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}
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@ -70,14 +71,15 @@ void Interpreter::step(CpuCore* core, Memory* mem, Disassembler* disassembler) {
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}
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case CpuOpcodes::SPECIALOpcode::JALR: {
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const u32 addr = gprs[instr.rs];
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gprs[instr.rd] = core->nextPc;
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if (addr & 3) {
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#ifndef DONT_CRASH_ON_BAD_JUMP
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Helpers::panic("Bad JALR addr\n");
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#else
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core->exception(CpuCore::Exception::BadFetchAddr, true);
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break;
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#endif
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}
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gprs[CpuOpcodes::CpuReg::RA] = core->nextPc;
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core->nextPc = addr;
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core->branched = true;
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break;
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@ -157,8 +159,14 @@ void Interpreter::step(CpuCore* core, Memory* mem, Disassembler* disassembler) {
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break;
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}
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case CpuOpcodes::SPECIALOpcode::ADD: {
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u32 a = gprs[instr.rs];
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u32 b = gprs[instr.rt];
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u32 res = a + b;
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if (((a >> 31) == (b >> 31)) && ((a >> 31) != (res >> 31))) {
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core->exception(CpuCore::Exception::Overflow, true);
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break;
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}
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gprs[instr.rd] = gprs[instr.rs] + gprs[instr.rt];
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// TODO: overflow exception
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break;
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}
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case CpuOpcodes::SPECIALOpcode::ADDU: {
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@ -166,8 +174,14 @@ void Interpreter::step(CpuCore* core, Memory* mem, Disassembler* disassembler) {
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break;
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}
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case CpuOpcodes::SPECIALOpcode::SUB: {
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gprs[instr.rd] = gprs[instr.rs] - gprs[instr.rt];
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// TODO: overflow exception
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u32 a = gprs[instr.rs];
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u32 b = gprs[instr.rt];
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u32 res = a - b;
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if (((a ^ res) & (~b ^ res)) >> 31) {
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core->exception(CpuCore::Exception::Overflow, true);
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break;
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}
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gprs[instr.rd] = res;
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break;
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}
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case CpuOpcodes::SPECIALOpcode::SUBU: {
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@ -204,40 +218,29 @@ void Interpreter::step(CpuCore* core, Memory* mem, Disassembler* disassembler) {
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break;
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}
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case CpuOpcodes::Opcode::REGIMM: {
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switch (instr.regimmOpc & 0x11) {
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case CpuOpcodes::REGIMMOpcode::BLTZ: {
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if ((s32)gprs[instr.rs] < 0) {
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bool ge = (instr.raw >> 16) & 1;
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bool link = ((instr.raw >> 17) & 0xf) == 8;
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s32 rs = (s32)gprs[instr.rs];
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if (link) gprs[CpuReg::RA] = core->nextPc;
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if (ge) {
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if (rs >= 0) {
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core->nextPc = core->pc + ((u32)(s16)instr.imm << 2);
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core->branched = true;
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}
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break;
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}
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case CpuOpcodes::REGIMMOpcode::BGEZ: {
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if ((s32)gprs[instr.rs] >= 0) {
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else {
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if (rs < 0) {
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core->nextPc = core->pc + ((u32)(s16)instr.imm << 2);
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core->branched = true;
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}
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break;
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}
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case CpuOpcodes::REGIMMOpcode::BLTZAL: {
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gprs[CpuOpcodes::CpuReg::RA] = core->nextPc;
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if ((s32)gprs[instr.rs] < 0) {
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core->nextPc = core->pc + ((u32)(s16)instr.imm << 2);
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core->branched = true;
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}
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break;
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}
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case CpuOpcodes::REGIMMOpcode::BGEZAL: {
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gprs[CpuOpcodes::CpuReg::RA] = core->nextPc;
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if ((s32)gprs[instr.rs] >= 0) {
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core->nextPc = core->pc + ((u32)(s16)instr.imm << 2);
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core->branched = true;
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}
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break;
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}
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default:
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Helpers::panic("[ FATAL ] Invalid REGIMM instruction 0x%02x (raw: 0x%08x)\n", instr.regimmOpc.Value(), instr.raw);
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}
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Helpers::panic("[ FATAL ] Invalid REGIMM instruction 0x%02x (raw: 0x%08x)\n", instr.regimmOpc.Value(), instr.raw);
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break;
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}
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case CpuOpcodes::Opcode::J: {
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@ -246,7 +249,7 @@ void Interpreter::step(CpuCore* core, Memory* mem, Disassembler* disassembler) {
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break;
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}
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case CpuOpcodes::Opcode::JAL: {
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gprs[CpuOpcodes::CpuReg::RA] = core->nextPc;
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gprs[CpuReg::RA] = core->nextPc;
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core->nextPc = (core->pc & 0xf0000000) | (instr.jumpImm << 2);
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core->branched = true;
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break;
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@ -280,8 +283,14 @@ void Interpreter::step(CpuCore* core, Memory* mem, Disassembler* disassembler) {
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break;
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}
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case CpuOpcodes::Opcode::ADDI: {
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gprs[instr.rt] = gprs[instr.rs] + (u32)(s16)instr.imm;
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// TODO: overflow exception
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u32 a = gprs[instr.rs];
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u32 b = (u32)(s16)instr.imm;
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u32 res = a + b;
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if (((a >> 31) == (b >> 31)) && ((a >> 31) != (res >> 31))) {
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core->exception(CpuCore::Exception::Overflow, true);
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break;
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}
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gprs[instr.rt] = res;
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break;
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}
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case CpuOpcodes::Opcode::ADDIU: {
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@ -352,6 +361,9 @@ void Interpreter::step(CpuCore* core, Memory* mem, Disassembler* disassembler) {
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if (addr & 1) {
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#ifndef DONT_CRASH_ON_BAD_READWRITE
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Helpers::panic("Bad lh addr 0x%08x\n", addr);
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#else
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core->exception(CpuCore::Exception::BadFetchAddr, true);
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break;
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#endif
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}
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gprs[instr.rt] = (u32)(s16)mem->read<u16>(addr);
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@ -361,8 +373,8 @@ void Interpreter::step(CpuCore* core, Memory* mem, Disassembler* disassembler) {
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u32 address = gprs[instr.rs] + (u32)(s16)instr.imm;
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const int shift = ((address & 3) ^ 3) * 8;
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u32 dataTemp = mem->read<u32>(address & ~3);
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u32 rtTemp = gprs[instr.rt] & ~(0xffffffff >> shift);
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dataTemp >>= shift;
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u32 rtTemp = gprs[instr.rt] & ~(0xffffffff << shift);
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dataTemp <<= shift;
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gprs[instr.rt] = dataTemp | rtTemp;
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break;
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}
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if (addr & 3) {
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#ifndef DONT_CRASH_ON_BAD_READWRITE
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Helpers::panic("Bad lw addr 0x%08x\n", addr);
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#else
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core->exception(CpuCore::Exception::BadFetchAddr, true);
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break;
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#endif
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}
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gprs[instr.rt] = mem->read<u32>(addr);
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if (addr & 1) {
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#ifndef DONT_CRASH_ON_BAD_READWRITE
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Helpers::panic("Bad lhu addr 0x%08x\n", addr);
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#else
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core->exception(CpuCore::Exception::BadFetchAddr, true);
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break;
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#endif
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}
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gprs[instr.rt] = mem->read<u16>(addr);
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@ -395,8 +413,8 @@ void Interpreter::step(CpuCore* core, Memory* mem, Disassembler* disassembler) {
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u32 address = gprs[instr.rs] + (u32)(s16)instr.imm;
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const int shift = (address & 3) * 8;
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u32 dataTemp = mem->read<u32>(address & ~3);
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u32 rtTemp = gprs[instr.rt] & ~(0xffffffff << shift);
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dataTemp <<= shift;
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u32 rtTemp = gprs[instr.rt] & ~(0xffffffff >> shift);
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dataTemp >>= shift;
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gprs[instr.rt] = dataTemp | rtTemp;
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break;
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}
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if (addr & 1) {
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#ifndef DONT_CRASH_ON_BAD_READWRITE
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Helpers::panic("Bad sh addr 0x%08x\n", addr);
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#else
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core->exception(CpuCore::Exception::BadStoreAddr, true);
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break;
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#endif
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}
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mem->write<u16>(addr, gprs[instr.rt]);
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u32 address = gprs[instr.rs] + (u32)(s16)instr.imm;
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const int shift = ((address & 3) ^ 3) * 8;
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u32 dataTemp = mem->read<u32>(address & ~3);
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u32 rtTemp = gprs[instr.rt] << shift;
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dataTemp &= ~(0xffffffff << shift);
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u32 rtTemp = gprs[instr.rt] >> shift;
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dataTemp &= ~(0xffffffff >> shift);
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mem->write<u32>(address & ~3, dataTemp | rtTemp);
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break;
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}
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if (addr & 3) {
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#ifndef DONT_CRASH_ON_BAD_READWRITE
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Helpers::panic("Bad sw addr 0x%08x\n", addr);
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#else
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core->exception(CpuCore::Exception::BadStoreAddr, true);
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break;
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#endif
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}
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mem->write<u32>(addr, gprs[instr.rt]);
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u32 address = gprs[instr.rs] + (u32)(s16)instr.imm;
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const int shift = (address & 3) * 8;
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u32 dataTemp = mem->read<u32>(address & ~3);
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u32 rtTemp = gprs[instr.rt] >> shift;
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dataTemp &= ~(0xffffffff >> shift);
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u32 rtTemp = gprs[instr.rt] << shift;
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dataTemp &= ~(0xffffffff << shift);
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mem->write<u32>(address & ~3, dataTemp | rtTemp);
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break;
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}
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case (u32)COP0Reg::BDA: return 0;
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case (u32)COP0Reg::JumpDest: return 0;
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case (u32)COP0Reg::DCIC: return 0;
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case (u32)COP0Reg::BadVAddr: return 0;
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case (u32)COP0Reg::BadVAddr: return badVaddr;
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case (u32)COP0Reg::BDAM: return 0;
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case (u32)COP0Reg::BPCM: return 0;
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case (u32)COP0Reg::Status: return status.raw;
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}
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};
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namespace CpuOpcodes {
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enum CpuReg {
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namespace CpuReg {
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enum {
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R0 = 0, AT = 1, V0 = 2, V1 = 3,
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A0 = 4, A1 = 5, A2 = 6, A3 = 7,
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T0 = 8, T1 = 9, T2 = 10, T3 = 11,
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@ -180,7 +180,9 @@ enum CpuReg {
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GP = 28, SP = 29, S8 = 30, RA = 31,
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LO = 32, HI = 33
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};
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}
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namespace CpuOpcodes {
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enum Opcode {
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SPECIAL = 0x00,
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REGIMM = 0x01,
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