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Code Issues Releases Activity

dmnt: explicitly reserve double-extended width opcodes

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This commit is contained in:
Michael Scire 2019-05-27 18:10:49 -07:00
parent 766097d0b7
commit cfa050cc8f
2 changed files with 8 additions and 0 deletions
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4
stratosphere/dmnt/source/dmnt_cheat_vm.cpp
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@ -260,6 +260,9 @@ bool DmntCheatVm::DecodeNextOpcode(CheatVmOpcode *out) {
if (opcode.opcode >= CheatVmOpcodeType_ExtendedWidth) {
opcode.opcode = (CheatVmOpcodeType)((((u32)opcode.opcode) << 4) | ((first_dword >> 24) & 0xF));
}
if (opcode.opcode >= CheatVmOpcodeType_DoubleExtendedWidth) {
opcode.opcode = (CheatVmOpcodeType)((((u32)opcode.opcode) << 4) | ((first_dword >> 20) & 0xF));
}
/* detect condition start. */
switch (opcode.opcode) {
@ -501,6 +504,7 @@ bool DmntCheatVm::DecodeNextOpcode(CheatVmOpcode *out) {
}
break;
case CheatVmOpcodeType_ExtendedWidth:
case CheatVmOpcodeType_DoubleExtendedWidth:
default:
/* Unrecognized instruction cannot be decoded. */
valid = false;

4
stratosphere/dmnt/source/dmnt_cheat_vm.hpp
View file

@ -45,6 +45,10 @@ enum CheatVmOpcodeType : u32 {
CheatVmOpcodeType_BeginRegisterConditionalBlock = 0xC0,
CheatVmOpcodeType_SaveRestoreRegister = 0xC1,
CheatVmOpcodeType_SaveRestoreRegisterMask = 0xC2,
/* This is a meta entry, and not a real opcode. */
/* This is to facilitate multi-nybble instruction decoding. */
CheatVmOpcodeType_DoubleExtendedWidth = 0xF0,
};
enum MemoryAccessType : u32 {