diff options
Diffstat (limited to 'qtmips_machine/instruction.cpp')
| -rw-r--r-- | qtmips_machine/instruction.cpp | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/qtmips_machine/instruction.cpp b/qtmips_machine/instruction.cpp index ed9064b..9eae5f3 100644 --- a/qtmips_machine/instruction.cpp +++ b/qtmips_machine/instruction.cpp @@ -106,9 +106,10 @@ static const struct InstructionMap alu_instruction_map[] = { .flags = FLAGS_ALU_T_R_STD}, {"MOVN", IT_R, ALU_OP_MOVN, NOMEM, nullptr, .flags = FLAGS_ALU_T_R_STD}, - IM_UNKNOWN, + {"SYSCALL",IT_R, ALU_OP_SYSCALL, NOMEM, nullptr, + .flags = IMF_SUPPORTED | IMF_EXCEPTION}, {"BREAK", IT_R, ALU_OP_BREAK, NOMEM, nullptr, - .flags = IMF_SUPPORTED}, + .flags = IMF_SUPPORTED | IMF_EXCEPTION}, IM_UNKNOWN, IM_UNKNOWN, {"MFHI", IT_R, ALU_OP_MFHI, NOMEM, nullptr, @@ -426,8 +427,23 @@ void Instruction::flags_alu_op_mem_ctl(enum InstructionFlags &flags, mem_ctl = im.mem_ctl; } +enum ExceptionCause Instruction::encoded_exception() const { + const struct InstructionMap &im = InstructionMapFind(dt); + if (!(im.flags & IMF_EXCEPTION)) + return EXCAUSE_NONE; + switch (im.alu) { + case ALU_OP_BREAK: + return EXCAUSE_BREAK; + case ALU_OP_SYSCALL: + return EXCAUSE_SYSCALL; + default: + return EXCAUSE_NONE; + } +} + bool Instruction::is_break() const { - return opcode() == 0 && funct() == ALU_OP_BREAK; + const struct InstructionMap &im = InstructionMapFind(dt); + return im.alu == ALU_OP_BREAK; } bool Instruction::operator==(const Instruction &c) const { |