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Cheats: Use safe memory access routines

This commit is contained in:
Connor McLaughlin 2021-09-10 15:53:15 +10:00
parent 8dcd68b0a8
commit e12474ac91
1 changed files with 337 additions and 348 deletions
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685
src/core/cheats.cpp
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@ -14,8 +14,9 @@
#include <cctype> #include <cctype>
#include <iomanip> #include <iomanip>
#include <sstream> #include <sstream>
#include <type_traits>
Log_SetChannel(Cheats); Log_SetChannel(Cheats);
static std::array<u32, 256> cht_register; //Used for D7 ,51 & 52 cheat types static std::array<u32, 256> cht_register; // Used for D7 ,51 & 52 cheat types
using KeyValuePairVector = std::vector<std::pair<std::string, std::string>>; using KeyValuePairVector = std::vector<std::pair<std::string, std::string>>;
@ -39,66 +40,34 @@ static bool IsValidScanAddress(PhysicalMemoryAddress address)
} }
template<typename T> template<typename T>
static T DoMemoryRead(PhysicalMemoryAddress address) static T DoMemoryRead(VirtualMemoryAddress address)
{ {
using UnsignedType = typename std::make_unsigned_t<T>;
static_assert(std::is_same_v<UnsignedType, u8> || std::is_same_v<UnsignedType, u16> ||
std::is_same_v<UnsignedType, u32>);
T result; T result;
if constexpr (std::is_same_v<UnsignedType, u8>)
if ((address & CPU::DCACHE_LOCATION_MASK) == CPU::DCACHE_LOCATION && return CPU::SafeReadMemoryByte(address, &result) ? result : static_cast<T>(0);
(address & CPU::DCACHE_OFFSET_MASK) < CPU::DCACHE_SIZE) else if constexpr (std::is_same_v<UnsignedType, u16>)
{ return CPU::SafeReadMemoryHalfWord(address, &result) ? result : static_cast<T>(0);
std::memcpy(&result, &CPU::g_state.dcache[address & CPU::DCACHE_OFFSET_MASK], sizeof(result)); else // if constexpr (std::is_same_v<UnsignedType, u32>)
return result; return CPU::SafeReadMemoryWord(address, &result) ? result : static_cast<T>(0);
}
address &= CPU::PHYSICAL_MEMORY_ADDRESS_MASK;
if (address < Bus::RAM_MIRROR_END)
{
if (Bus::g_ram != NULL)
std::memcpy(&result, &Bus::g_ram[address & Bus::g_ram_mask], sizeof(result));
else
return 0;
return result;
}
if (address >= Bus::BIOS_BASE && address < (Bus::BIOS_BASE + Bus::BIOS_SIZE))
{
std::memcpy(&result, &Bus::g_bios[address & Bus::BIOS_MASK], sizeof(result));
return result;
}
result = static_cast<T>(0);
return result;
} }
template<typename T> template<typename T>
static void DoMemoryWrite(PhysicalMemoryAddress address, T value) static void DoMemoryWrite(PhysicalMemoryAddress address, T value)
{ {
if ((address & CPU::DCACHE_LOCATION_MASK) == CPU::DCACHE_LOCATION && using UnsignedType = typename std::make_unsigned_t<T>;
(address & CPU::DCACHE_OFFSET_MASK) < CPU::DCACHE_SIZE) static_assert(std::is_same_v<UnsignedType, u8> || std::is_same_v<UnsignedType, u16> ||
{ std::is_same_v<UnsignedType, u32>);
std::memcpy(&CPU::g_state.dcache[address & CPU::DCACHE_OFFSET_MASK], &value, sizeof(value));
return;
}
address &= CPU::PHYSICAL_MEMORY_ADDRESS_MASK; if constexpr (std::is_same_v<UnsignedType, u8>)
CPU::SafeWriteMemoryByte(address, value);
if (address < Bus::RAM_MIRROR_END) else if constexpr (std::is_same_v<UnsignedType, u16>)
{ CPU::SafeWriteMemoryHalfWord(address, value);
// Only invalidate code when it changes. else // if constexpr (std::is_same_v<UnsignedType, u32>)
T old_value; CPU::SafeWriteMemoryWord(address, value);
std::memcpy(&old_value, &Bus::g_ram[address & Bus::g_ram_mask], sizeof(old_value));
if (old_value != value)
{
std::memcpy(&Bus::g_ram[address & Bus::g_ram_mask], &value, sizeof(value));
const u32 code_page_index = Bus::GetRAMCodePageIndex(address & Bus::g_ram_mask);
if (Bus::IsRAMCodePage(code_page_index))
CPU::CodeCache::InvalidateBlocksWithPageIndex(code_page_index);
}
return;
}
} }
static u32 GetControllerButtonBits() static u32 GetControllerButtonBits()
@ -989,15 +958,15 @@ static bool IsConditionalInstruction(CheatCode::InstructionCode code)
{ {
switch (code) switch (code)
{ {
case CheatCode::InstructionCode::CompareEqual16: // D0 case CheatCode::InstructionCode::CompareEqual16: // D0
case CheatCode::InstructionCode::CompareNotEqual16: // D1 case CheatCode::InstructionCode::CompareNotEqual16: // D1
case CheatCode::InstructionCode::CompareLess16: // D2 case CheatCode::InstructionCode::CompareLess16: // D2
case CheatCode::InstructionCode::CompareGreater16: // D3 case CheatCode::InstructionCode::CompareGreater16: // D3
case CheatCode::InstructionCode::CompareEqual8: // E0 case CheatCode::InstructionCode::CompareEqual8: // E0
case CheatCode::InstructionCode::CompareNotEqual8: // E1 case CheatCode::InstructionCode::CompareNotEqual8: // E1
case CheatCode::InstructionCode::CompareLess8: // E2 case CheatCode::InstructionCode::CompareLess8: // E2
case CheatCode::InstructionCode::CompareGreater8: // E3 case CheatCode::InstructionCode::CompareGreater8: // E3
case CheatCode::InstructionCode::CompareButtons: // D4 case CheatCode::InstructionCode::CompareButtons: // D4
case CheatCode::InstructionCode::ExtCompareEqual32: // A0 case CheatCode::InstructionCode::ExtCompareEqual32: // A0
case CheatCode::InstructionCode::ExtCompareNotEqual32: // A1 case CheatCode::InstructionCode::ExtCompareNotEqual32: // A1
case CheatCode::InstructionCode::ExtCompareLess32: // A2 case CheatCode::InstructionCode::ExtCompareLess32: // A2
@ -1287,9 +1256,9 @@ void CheatCode::Apply() const
const u16 value2 = Truncate16((inst.value32 & 0xFFFF0000u) >> 16); const u16 value2 = Truncate16((inst.value32 & 0xFFFF0000u) >> 16);
const u16 value = DoMemoryRead<u16>(inst.address); const u16 value = DoMemoryRead<u16>(inst.address);
if (value==value1) if (value == value1)
DoMemoryWrite<u16>(inst.address, value2); DoMemoryWrite<u16>(inst.address, value2);
else if (value==value2) else if (value == value2)
DoMemoryWrite<u16>(inst.address, value1); DoMemoryWrite<u16>(inst.address, value1);
index++; index++;
} }
@ -1535,7 +1504,8 @@ void CheatCode::Apply() const
break; break;
case 0x43: // Write the u16 from cht_register[cht_reg_no2] to cht_register[cht_reg_no1] case 0x43: // Write the u16 from cht_register[cht_reg_no2] to cht_register[cht_reg_no1]
// and add the u16 from the address field to it // and add the u16 from the address field to it
cht_register[cht_reg_no1] = Truncate16(cht_register[cht_reg_no2] & 0xFFFFu) + Truncate16(poke_value & 0xFFFFu); cht_register[cht_reg_no1] =
Truncate16(cht_register[cht_reg_no2] & 0xFFFFu) + Truncate16(poke_value & 0xFFFFu);
break; break;
case 0x44: // Write the u16 from the value stored in cht_register[cht_reg_no2] + poke_value to the address case 0x44: // Write the u16 from the value stored in cht_register[cht_reg_no2] + poke_value to the address
// stored in cht_register[cht_reg_no1] // stored in cht_register[cht_reg_no1]
@ -1655,272 +1625,296 @@ void CheatCode::Apply() const
break; break;
case InstructionCode::ExtMultiConditionals: // F6 case InstructionCode::ExtMultiConditionals: // F6
{ {
//Ensure any else if or else that are hit outside the if context are skipped // Ensure any else if or else that are hit outside the if context are skipped
if ( (inst.value32 & 0xFFFFFF00u) != 0x1F000000) if ((inst.value32 & 0xFFFFFF00u) != 0x1F000000)
{ {
activate_codes = false; activate_codes = false;
break; break;
} }
for (;;) for (;;)
{ {
const u8 totalConds = Truncate8(instructions[index-1].value32 & 0x000000FFu); const u8 totalConds = Truncate8(instructions[index - 1].value32 & 0x000000FFu);
const u8 conditionType = Truncate8(instructions[index-1].address & 0x000000FFu); const u8 conditionType = Truncate8(instructions[index - 1].address & 0x000000FFu);
bool conditions_check; bool conditions_check;
if (conditionType == 0x00 && totalConds > 0) // AND if (conditionType == 0x00 && totalConds > 0) // AND
{
conditions_check = true;
for (int i = 1; totalConds >= i; index++, i++)
{ {
conditions_check = true; switch (instructions[index].code)
for (int i = 1; totalConds >= i; index++, i++)
{ {
switch (instructions[index].code) case InstructionCode::CompareEqual16: // D0
conditions_check &=
(DoMemoryRead<u16>(instructions[index].address) == instructions[index].value16);
break;
case InstructionCode::CompareNotEqual16: // D1
conditions_check &=
(DoMemoryRead<u16>(instructions[index].address) != instructions[index].value16);
break;
case InstructionCode::CompareLess16: // D2
conditions_check &=
(DoMemoryRead<u16>(instructions[index].address) < instructions[index].value16);
break;
case InstructionCode::CompareGreater16: // D3
conditions_check &=
(DoMemoryRead<u16>(instructions[index].address) > instructions[index].value16);
break;
case InstructionCode::CompareEqual8: // E0
conditions_check &= (DoMemoryRead<u8>(instructions[index].address) == instructions[index].value8);
break;
case InstructionCode::CompareNotEqual8: // E1
conditions_check &= (DoMemoryRead<u8>(instructions[index].address) != instructions[index].value8);
break;
case InstructionCode::CompareLess8: // E2
conditions_check &= (DoMemoryRead<u8>(instructions[index].address) < instructions[index].value8);
break;
case InstructionCode::CompareGreater8: // E3
conditions_check &= (DoMemoryRead<u8>(instructions[index].address) > instructions[index].value8);
break;
case InstructionCode::ExtCompareEqual32: // A0
conditions_check &=
(DoMemoryRead<u32>(instructions[index].address) == instructions[index].value32);
break;
case InstructionCode::ExtCompareNotEqual32: // A1
conditions_check &=
(DoMemoryRead<u32>(instructions[index].address) != instructions[index].value32);
break;
case InstructionCode::ExtCompareLess32: // A2
conditions_check &=
(DoMemoryRead<u32>(instructions[index].address) < instructions[index].value32);
break;
case InstructionCode::ExtCompareGreater32: // A3
conditions_check &=
(DoMemoryRead<u32>(instructions[index].address) > instructions[index].value32);
break;
case InstructionCode::ExtCompareBitsSet8: // E4 Internal to F6
conditions_check &=
(instructions[index].value8 ==
(DoMemoryRead<u8>(instructions[index].address) & instructions[index].value8));
break;
case InstructionCode::ExtCompareBitsClear8: // E5 Internal to F6
conditions_check &=
((DoMemoryRead<u8>(instructions[index].address) & instructions[index].value8) == 0);
break;
case InstructionCode::ExtBitCompareButtons: // D7
{ {
case InstructionCode::CompareEqual16: //D0 const u32 frame_compare_value = instructions[index].address & 0xFFFFu;
conditions_check &= (DoMemoryRead<u16>(instructions[index].address) == instructions[index].value16); const u8 cht_reg_no = Truncate8((instructions[index].value32 & 0xFF000000u) >> 24);
break; const bool bit_comparison_type = ((instructions[index].address & 0x100000u) >> 20);
case InstructionCode::CompareNotEqual16: //D1 const u8 frame_comparison = Truncate8((instructions[index].address & 0xF0000u) >> 16);
conditions_check &= (DoMemoryRead<u16>(instructions[index].address) != instructions[index].value16); const u32 check_value = (instructions[index].value32 & 0xFFFFFFu);
break; const u32 value1 = GetControllerButtonBits();
case InstructionCode::CompareLess16: //D2 const u32 value2 = GetControllerAnalogBits();
conditions_check &= (DoMemoryRead<u16>(instructions[index].address) < instructions[index].value16); u32 value = value1 | value2;
break;
case InstructionCode::CompareGreater16: //D3
conditions_check &= (DoMemoryRead<u16>(instructions[index].address) > instructions[index].value16);
break;
case InstructionCode::CompareEqual8: //E0
conditions_check &= (DoMemoryRead<u8>(instructions[index].address) == instructions[index].value8);
break;
case InstructionCode::CompareNotEqual8: //E1
conditions_check &= (DoMemoryRead<u8>(instructions[index].address) != instructions[index].value8);
break;
case InstructionCode::CompareLess8: //E2
conditions_check &= (DoMemoryRead<u8>(instructions[index].address) < instructions[index].value8);
break;
case InstructionCode::CompareGreater8: //E3
conditions_check &= (DoMemoryRead<u8>(instructions[index].address) > instructions[index].value8);
break;
case InstructionCode::ExtCompareEqual32: //A0
conditions_check &= (DoMemoryRead<u32>(instructions[index].address) == instructions[index].value32);
break;
case InstructionCode::ExtCompareNotEqual32: //A1
conditions_check &= (DoMemoryRead<u32>(instructions[index].address) != instructions[index].value32);
break;
case InstructionCode::ExtCompareLess32: //A2
conditions_check &= (DoMemoryRead<u32>(instructions[index].address) < instructions[index].value32);
break;
case InstructionCode::ExtCompareGreater32: //A3
conditions_check &= (DoMemoryRead<u32>(instructions[index].address) > instructions[index].value32);
break;
case InstructionCode::ExtCompareBitsSet8: //E4 Internal to F6
conditions_check &= (instructions[index].value8 == (DoMemoryRead<u8>(instructions[index].address) & instructions[index].value8));
break;
case InstructionCode::ExtCompareBitsClear8: //E5 Internal to F6
conditions_check &= ((DoMemoryRead<u8>(instructions[index].address) & instructions[index].value8) == 0);
break;
case InstructionCode::ExtBitCompareButtons: // D7
{
const u32 frame_compare_value = instructions[index].address & 0xFFFFu;
const u8 cht_reg_no = Truncate8((instructions[index].value32 & 0xFF000000u) >>24);
const bool bit_comparison_type = ((instructions[index].address & 0x100000u) >>20);
const u8 frame_comparison = Truncate8((instructions[index].address & 0xF0000u) >>16);
const u32 check_value = (instructions[index].value32 & 0xFFFFFFu);
const u32 value1 = GetControllerButtonBits();
const u32 value2 = GetControllerAnalogBits();
u32 value = value1 | value2;
if ((bit_comparison_type == false && check_value == (value & check_value))//Check Bits are set if ((bit_comparison_type == false && check_value == (value & check_value)) // Check Bits are set
|| (bit_comparison_type == true && check_value != (value & check_value))) //Check Bits are clear ||
(bit_comparison_type == true && check_value != (value & check_value))) // Check Bits are clear
{
cht_register[cht_reg_no] += 1;
switch (frame_comparison)
{ {
cht_register[cht_reg_no] += 1; case 0x0: // No comparison on frame count, just do it
switch (frame_comparison) conditions_check &= true;
{ break;
case 0x0: // No comparison on frame count, just do it case 0x1: // Check if frame_compare_value == current count
conditions_check &= true; conditions_check &= (cht_register[cht_reg_no] == frame_compare_value);
break; break;
case 0x1: // Check if frame_compare_value == current count case 0x2: // Check if frame_compare_value < current count
conditions_check &= (cht_register[cht_reg_no] == frame_compare_value); conditions_check &= (cht_register[cht_reg_no] < frame_compare_value);
break; break;
case 0x2: // Check if frame_compare_value < current count case 0x3: // Check if frame_compare_value > current count
conditions_check &= (cht_register[cht_reg_no] < frame_compare_value); conditions_check &= (cht_register[cht_reg_no] > frame_compare_value);
break; break;
case 0x3: // Check if frame_compare_value > current count case 0x4: // Check if frame_compare_value != current count
conditions_check &= (cht_register[cht_reg_no] > frame_compare_value); conditions_check &= (cht_register[cht_reg_no] != frame_compare_value);
break; break;
case 0x4: // Check if frame_compare_value != current count default:
conditions_check &= (cht_register[cht_reg_no] != frame_compare_value);
break;
default:
conditions_check &= false;
break;
}
}
else
{
cht_register[cht_reg_no] = 0;
conditions_check &= false; conditions_check &= false;
}
break;
}
default:
Log_ErrorPrintf("Incorrect conditional instruction (see chtdb.txt for supported instructions)");
return;
}
}
}
else if (conditionType == 0x01 && totalConds > 0) // OR
{
conditions_check = false;
for (int i = 1; totalConds >= i; index++, i++)
{
switch (instructions[index].code)
{
case InstructionCode::CompareEqual16: //D0
conditions_check |= (DoMemoryRead<u16>(instructions[index].address) == instructions[index].value16);
break;
case InstructionCode::CompareNotEqual16: //D1
conditions_check |= (DoMemoryRead<u16>(instructions[index].address) != instructions[index].value16);
break;
case InstructionCode::CompareLess16: //D2
conditions_check |= (DoMemoryRead<u16>(instructions[index].address) < instructions[index].value16);
break;
case InstructionCode::CompareGreater16: //D3
conditions_check |= (DoMemoryRead<u16>(instructions[index].address) > instructions[index].value16);
break;
case InstructionCode::CompareEqual8: //E0
conditions_check |= (DoMemoryRead<u8>(instructions[index].address) == instructions[index].value8);
break;
case InstructionCode::CompareNotEqual8: //E1
conditions_check |= (DoMemoryRead<u8>(instructions[index].address) != instructions[index].value8);
break;
case InstructionCode::CompareLess8: //E2
conditions_check |= (DoMemoryRead<u8>(instructions[index].address) < instructions[index].value8);
break;
case InstructionCode::CompareGreater8: //E3
conditions_check |= (DoMemoryRead<u8>(instructions[index].address) > instructions[index].value8);
break;
case InstructionCode::ExtCompareEqual32: //A0
conditions_check |= (DoMemoryRead<u32>(instructions[index].address) == instructions[index].value32);
break;
case InstructionCode::ExtCompareNotEqual32: //A1
conditions_check |= (DoMemoryRead<u32>(instructions[index].address) != instructions[index].value32);
break;
case InstructionCode::ExtCompareLess32: //A2
conditions_check |= (DoMemoryRead<u32>(instructions[index].address) < instructions[index].value32);
break;
case InstructionCode::ExtCompareGreater32: //A3
conditions_check |= (DoMemoryRead<u32>(instructions[index].address) > instructions[index].value32);
break;
case InstructionCode::ExtCompareBitsSet8: //E4 Internal to F6
conditions_check |= (instructions[index].value8 == (DoMemoryRead<u8>(instructions[index].address) & instructions[index].value8));
break;
case InstructionCode::ExtCompareBitsClear8: //E5 Internal to F6
conditions_check |= ((DoMemoryRead<u8>(instructions[index].address) & instructions[index].value8) == 0);
break;
case InstructionCode::ExtBitCompareButtons: // D7
{
const u32 frame_compare_value = instructions[index].address & 0xFFFFu;
const u8 cht_reg_no = Truncate8((instructions[index].value32 & 0xFF000000u) >>24);
const bool bit_comparison_type = ((instructions[index].address & 0x100000u) >>20);
const u8 frame_comparison = Truncate8((instructions[index].address & 0xF0000u) >>16);
const u32 check_value = (instructions[index].value32 & 0xFFFFFFu);
const u32 value1 = GetControllerButtonBits();
const u32 value2 = GetControllerAnalogBits();
u32 value = value1 | value2;
if ((bit_comparison_type == false && check_value == (value & check_value))//Check Bits are set
|| (bit_comparison_type == true && check_value != (value & check_value))) //Check Bits are clear
{
cht_register[cht_reg_no] += 1;
switch (frame_comparison)
{
case 0x0: // No comparison on frame count, just do it
conditions_check |= true;
break;
case 0x1: // Check if frame_compare_value == current count
conditions_check |= (cht_register[cht_reg_no] == frame_compare_value);
break;
case 0x2: // Check if frame_compare_value < current count
conditions_check |= (cht_register[cht_reg_no] < frame_compare_value);
break;
case 0x3: // Check if frame_compare_value > current count
conditions_check |= (cht_register[cht_reg_no] > frame_compare_value);
break;
case 0x4: // Check if frame_compare_value != current count
conditions_check |= (cht_register[cht_reg_no] != frame_compare_value);
break;
default:
conditions_check |= false;
break;
}
}
else
{
cht_register[cht_reg_no] = 0;
conditions_check |= false;
}
break;
}
default:
Log_ErrorPrintf("Incorrect conditional instruction (see chtdb.txt for supported instructions)");
return;
}
}
}
else
{
Log_ErrorPrintf("Incomplete multi conditional instruction");
return;
}
if ( conditions_check == true)
{
activate_codes = true;
break;
}
else
{//parse through to 00000000 FFFF and peek if next line is a F6 type associated with a ELSE
activate_codes = false;
// skip to the next separator (00000000 FFFF), or end
constexpr u64 separator_value = UINT64_C(0x000000000000FFFF);
constexpr u64 else_value = UINT64_C(0x00000000E15E0000);
constexpr u64 elseif_value = UINT64_C(0x00000000E15E1F00);
while (index < count)
{
const u64 bits = instructions[index++].bits;
if (bits == separator_value )
{
const u64 bits_ahead = instructions[index].bits;
if ((bits_ahead & 0xFFFFFF00u) == elseif_value)
{
break;
}
if ((bits_ahead & 0xFFFF0000u) == else_value)
{
//index++;
activate_codes = true;
break; break;
} }
index--;
break;
} }
if ((bits & 0xFFFFFF00u) == elseif_value) else
{ {
//index--; cht_register[cht_reg_no] = 0;
break; conditions_check &= false;
}
if ((bits & 0xFFFFFFFFu) == else_value)
{
//index++;
activate_codes = true;
break;
} }
break;
} }
if (activate_codes == true) default:
break; Log_ErrorPrintf("Incorrect conditional instruction (see chtdb.txt for supported instructions)");
return;
}
} }
} }
break; else if (conditionType == 0x01 && totalConds > 0) // OR
{
conditions_check = false;
for (int i = 1; totalConds >= i; index++, i++)
{
switch (instructions[index].code)
{
case InstructionCode::CompareEqual16: // D0
conditions_check |=
(DoMemoryRead<u16>(instructions[index].address) == instructions[index].value16);
break;
case InstructionCode::CompareNotEqual16: // D1
conditions_check |=
(DoMemoryRead<u16>(instructions[index].address) != instructions[index].value16);
break;
case InstructionCode::CompareLess16: // D2
conditions_check |=
(DoMemoryRead<u16>(instructions[index].address) < instructions[index].value16);
break;
case InstructionCode::CompareGreater16: // D3
conditions_check |=
(DoMemoryRead<u16>(instructions[index].address) > instructions[index].value16);
break;
case InstructionCode::CompareEqual8: // E0
conditions_check |= (DoMemoryRead<u8>(instructions[index].address) == instructions[index].value8);
break;
case InstructionCode::CompareNotEqual8: // E1
conditions_check |= (DoMemoryRead<u8>(instructions[index].address) != instructions[index].value8);
break;
case InstructionCode::CompareLess8: // E2
conditions_check |= (DoMemoryRead<u8>(instructions[index].address) < instructions[index].value8);
break;
case InstructionCode::CompareGreater8: // E3
conditions_check |= (DoMemoryRead<u8>(instructions[index].address) > instructions[index].value8);
break;
case InstructionCode::ExtCompareEqual32: // A0
conditions_check |=
(DoMemoryRead<u32>(instructions[index].address) == instructions[index].value32);
break;
case InstructionCode::ExtCompareNotEqual32: // A1
conditions_check |=
(DoMemoryRead<u32>(instructions[index].address) != instructions[index].value32);
break;
case InstructionCode::ExtCompareLess32: // A2
conditions_check |=
(DoMemoryRead<u32>(instructions[index].address) < instructions[index].value32);
break;
case InstructionCode::ExtCompareGreater32: // A3
conditions_check |=
(DoMemoryRead<u32>(instructions[index].address) > instructions[index].value32);
break;
case InstructionCode::ExtCompareBitsSet8: // E4 Internal to F6
conditions_check |=
(instructions[index].value8 ==
(DoMemoryRead<u8>(instructions[index].address) & instructions[index].value8));
break;
case InstructionCode::ExtCompareBitsClear8: // E5 Internal to F6
conditions_check |=
((DoMemoryRead<u8>(instructions[index].address) & instructions[index].value8) == 0);
break;
case InstructionCode::ExtBitCompareButtons: // D7
{
const u32 frame_compare_value = instructions[index].address & 0xFFFFu;
const u8 cht_reg_no = Truncate8((instructions[index].value32 & 0xFF000000u) >> 24);
const bool bit_comparison_type = ((instructions[index].address & 0x100000u) >> 20);
const u8 frame_comparison = Truncate8((instructions[index].address & 0xF0000u) >> 16);
const u32 check_value = (instructions[index].value32 & 0xFFFFFFu);
const u32 value1 = GetControllerButtonBits();
const u32 value2 = GetControllerAnalogBits();
u32 value = value1 | value2;
if ((bit_comparison_type == false && check_value == (value & check_value)) // Check Bits are set
||
(bit_comparison_type == true && check_value != (value & check_value))) // Check Bits are clear
{
cht_register[cht_reg_no] += 1;
switch (frame_comparison)
{
case 0x0: // No comparison on frame count, just do it
conditions_check |= true;
break;
case 0x1: // Check if frame_compare_value == current count
conditions_check |= (cht_register[cht_reg_no] == frame_compare_value);
break;
case 0x2: // Check if frame_compare_value < current count
conditions_check |= (cht_register[cht_reg_no] < frame_compare_value);
break;
case 0x3: // Check if frame_compare_value > current count
conditions_check |= (cht_register[cht_reg_no] > frame_compare_value);
break;
case 0x4: // Check if frame_compare_value != current count
conditions_check |= (cht_register[cht_reg_no] != frame_compare_value);
break;
default:
conditions_check |= false;
break;
}
}
else
{
cht_register[cht_reg_no] = 0;
conditions_check |= false;
}
break;
}
default:
Log_ErrorPrintf("Incorrect conditional instruction (see chtdb.txt for supported instructions)");
return;
}
}
}
else
{
Log_ErrorPrintf("Incomplete multi conditional instruction");
return;
}
if (conditions_check == true)
{
activate_codes = true;
break;
}
else
{ // parse through to 00000000 FFFF and peek if next line is a F6 type associated with a ELSE
activate_codes = false;
// skip to the next separator (00000000 FFFF), or end
constexpr u64 separator_value = UINT64_C(0x000000000000FFFF);
constexpr u64 else_value = UINT64_C(0x00000000E15E0000);
constexpr u64 elseif_value = UINT64_C(0x00000000E15E1F00);
while (index < count)
{
const u64 bits = instructions[index++].bits;
if (bits == separator_value)
{
const u64 bits_ahead = instructions[index].bits;
if ((bits_ahead & 0xFFFFFF00u) == elseif_value)
{
break;
}
if ((bits_ahead & 0xFFFF0000u) == else_value)
{
// index++;
activate_codes = true;
break;
}
index--;
break;
}
if ((bits & 0xFFFFFF00u) == elseif_value)
{
// index--;
break;
}
if ((bits & 0xFFFFFFFFu) == else_value)
{
// index++;
activate_codes = true;
break;
}
}
if (activate_codes == true)
break;
}
}
break;
} }
default: default:
activate_codes = false; activate_codes = false;
@ -1945,23 +1939,23 @@ void CheatCode::Apply() const
} }
break; break;
case InstructionCode::ExtBitCompareButtons: // D7 case InstructionCode::ExtBitCompareButtons: // D7
{ {
index++; index++;
bool activate_codes; bool activate_codes;
const u32 frame_compare_value = inst.address & 0xFFFFu; const u32 frame_compare_value = inst.address & 0xFFFFu;
const u8 cht_reg_no = Truncate8((inst.value32 & 0xFF000000u)>>24); const u8 cht_reg_no = Truncate8((inst.value32 & 0xFF000000u) >> 24);
const bool bit_comparison_type = ((inst.address & 0x100000u) >>20); const bool bit_comparison_type = ((inst.address & 0x100000u) >> 20);
const u8 frame_comparison = Truncate8((inst.address & 0xF0000u) >>16); const u8 frame_comparison = Truncate8((inst.address & 0xF0000u) >> 16);
const u32 check_value = (inst.value32 & 0xFFFFFFu); const u32 check_value = (inst.value32 & 0xFFFFFFu);
const u32 value1 = GetControllerButtonBits(); const u32 value1 = GetControllerButtonBits();
const u32 value2 = GetControllerAnalogBits(); const u32 value2 = GetControllerAnalogBits();
u32 value = value1 | value2; u32 value = value1 | value2;
if ((bit_comparison_type==false && check_value==(value & check_value))//Check Bits are set if ((bit_comparison_type == false && check_value == (value & check_value)) // Check Bits are set
|| (bit_comparison_type==true && check_value!=(value & check_value))) //Check Bits are clear || (bit_comparison_type == true && check_value != (value & check_value))) // Check Bits are clear
{ {
cht_register[cht_reg_no]+=1; cht_register[cht_reg_no] += 1;
switch (frame_comparison) switch (frame_comparison)
{ {
case 0x0: // No comparison on frame count, just do it case 0x0: // No comparison on frame count, just do it
@ -1986,8 +1980,8 @@ void CheatCode::Apply() const
} }
else else
{ {
cht_register[cht_reg_no]=0; cht_register[cht_reg_no] = 0;
activate_codes = false; activate_codes = false;
} }
if (activate_codes) if (activate_codes)
@ -2008,7 +2002,6 @@ void CheatCode::Apply() const
} }
break; break;
case InstructionCode::ExtCheatRegistersCompare: // 52 case InstructionCode::ExtCheatRegistersCompare: // 52
{ {
index++; index++;
@ -2579,13 +2572,13 @@ void CheatCode::Apply() const
{ {
DoMemoryWrite<u8>(address, Truncate8(value)); DoMemoryWrite<u8>(address, Truncate8(value));
if (address_change_negative) if (address_change_negative)
address -= address_change; address -= address_change;
else else
address += address_change; address += address_change;
if (value_change_negative) if (value_change_negative)
value -= value_change; value -= value_change;
else else
value += value_change; value += value_change;
} }
} }
else if (write_type == InstructionCode::ConstantWrite16) else if (write_type == InstructionCode::ConstantWrite16)
@ -2594,13 +2587,13 @@ void CheatCode::Apply() const
{ {
DoMemoryWrite<u16>(address, Truncate16(value)); DoMemoryWrite<u16>(address, Truncate16(value));
if (address_change_negative) if (address_change_negative)
address -= address_change; address -= address_change;
else else
address += address_change; address += address_change;
if (value_change_negative) if (value_change_negative)
value -= value_change; value -= value_change;
else else
value += value_change; value += value_change;
} }
} }
else if (write_type == InstructionCode::ExtConstantWrite32) else if (write_type == InstructionCode::ExtConstantWrite32)
@ -2609,13 +2602,13 @@ void CheatCode::Apply() const
{ {
DoMemoryWrite<u32>(address, value); DoMemoryWrite<u32>(address, value);
if (address_change_negative) if (address_change_negative)
address -= address_change; address -= address_change;
else else
address += address_change; address += address_change;
if (value_change_negative) if (value_change_negative)
value -= value_change; value -= value_change;
else else
value += value_change; value += value_change;
} }
} }
else else
@ -2627,8 +2620,6 @@ void CheatCode::Apply() const
} }
break; break;
case InstructionCode::MemoryCopy: case InstructionCode::MemoryCopy:
{ {
if ((index + 1) >= instructions.size()) if ((index + 1) >= instructions.size())
@ -2729,16 +2720,16 @@ void CheatCode::ApplyOnDisable() const
break; break;
// same deal for block conditionals // same deal for block conditionals
case InstructionCode::SkipIfNotEqual16: // C0 case InstructionCode::SkipIfNotEqual16: // C0
case InstructionCode::ExtSkipIfNotEqual32: // A4 case InstructionCode::ExtSkipIfNotEqual32: // A4
case InstructionCode::SkipIfButtonsNotEqual: // D5 case InstructionCode::SkipIfButtonsNotEqual: // D5
case InstructionCode::SkipIfButtonsEqual: // D6 case InstructionCode::SkipIfButtonsEqual: // D6
case InstructionCode::ExtBitCompareButtons: // D7 case InstructionCode::ExtBitCompareButtons: // D7
case InstructionCode::ExtSkipIfNotLess8: // C3 case InstructionCode::ExtSkipIfNotLess8: // C3
case InstructionCode::ExtSkipIfNotGreater8: // C4 case InstructionCode::ExtSkipIfNotGreater8: // C4
case InstructionCode::ExtSkipIfNotLess16: // C5 case InstructionCode::ExtSkipIfNotLess16: // C5
case InstructionCode::ExtSkipIfNotGreater16: // C6 case InstructionCode::ExtSkipIfNotGreater16: // C6
case InstructionCode::ExtMultiConditionals: // F6 case InstructionCode::ExtMultiConditionals: // F6
case InstructionCode::ExtCheatRegistersCompare: // 52 case InstructionCode::ExtCheatRegistersCompare: // 52
index++; index++;
break; break;
@ -3076,8 +3067,6 @@ void MemoryScan::Result::UpdateValue(MemoryAccessSize size, bool is_signed)
break; break;
} }
value_changed = (value != old_value); value_changed = (value != old_value);
} }