diff options
| -rw-r--r-- | qtmips_machine/alu.cpp | 2 | ||||
| -rw-r--r-- | qtmips_machine/instruction.cpp | 72 | ||||
| -rw-r--r-- | qtmips_machine/machinedefs.h | 3 |
3 files changed, 75 insertions, 2 deletions
diff --git a/qtmips_machine/alu.cpp b/qtmips_machine/alu.cpp index 8016444..2ac27a5 100644 --- a/qtmips_machine/alu.cpp +++ b/qtmips_machine/alu.cpp @@ -128,6 +128,8 @@ std::uint32_t machine::alu_operate(enum AluOp operation, std::uint32_t s, std::u return (s < t) ? 1 : 0; case ALU_OP_LUI: return t << 16; + case ALU_OP_BSHFL: + return (uint32_t)(int32_t)(int8_t)t; case ALU_OP_PASS_T: // Pass s argument without change for JAL return t; case ALU_OP_BREAK: diff --git a/qtmips_machine/instruction.cpp b/qtmips_machine/instruction.cpp index 9df45d8..db58d2a 100644 --- a/qtmips_machine/instruction.cpp +++ b/qtmips_machine/instruction.cpp @@ -160,6 +160,75 @@ static const struct InstructionMap alu_instruction_map[] = { .flags = FLAGS_ALU_T_R_STD}, }; +static const struct InstructionMap special3_instruction_map[] = { + IM_UNKNOWN, // 0 + IM_UNKNOWN, // 1 + IM_UNKNOWN, // 2 + IM_UNKNOWN, // 3 + IM_UNKNOWN, // 4 + IM_UNKNOWN, // 5 + IM_UNKNOWN, // 6 + IM_UNKNOWN, // 7 + IM_UNKNOWN, // 8 + IM_UNKNOWN, // 9 + IM_UNKNOWN, // 10 + IM_UNKNOWN, // 11 + IM_UNKNOWN, // 12 + IM_UNKNOWN, // 13 + IM_UNKNOWN, // 14 + IM_UNKNOWN, // 15 + IM_UNKNOWN, // 16 + IM_UNKNOWN, // 17 + IM_UNKNOWN, // 18 + IM_UNKNOWN, // 19 + IM_UNKNOWN, // 20 + IM_UNKNOWN, // 21 + IM_UNKNOWN, // 22 + IM_UNKNOWN, // 23 + IM_UNKNOWN, // 24 + IM_UNKNOWN, // 25 + IM_UNKNOWN, // 26 + IM_UNKNOWN, // 27 + IM_UNKNOWN, // 28 + IM_UNKNOWN, // 29 + IM_UNKNOWN, // 30 + IM_UNKNOWN, // 31 + {"BSHFL", IT_R, ALU_OP_BSHFL, NOMEM, nullptr, + .flags = FLAGS_ALU_T_R_TD}, + IM_UNKNOWN, // 33 + IM_UNKNOWN, // 34 + IM_UNKNOWN, // 35 + IM_UNKNOWN, // 36 + IM_UNKNOWN, // 37 + IM_UNKNOWN, // 38 + IM_UNKNOWN, // 39 + IM_UNKNOWN, // 40 + IM_UNKNOWN, // 41 + IM_UNKNOWN, // 42 + IM_UNKNOWN, // 43 + IM_UNKNOWN, // 44 + IM_UNKNOWN, // 45 + IM_UNKNOWN, // 46 + IM_UNKNOWN, // 47 + IM_UNKNOWN, // 48 + IM_UNKNOWN, // 49 + IM_UNKNOWN, // 50 + IM_UNKNOWN, // 51 + IM_UNKNOWN, // 52 + IM_UNKNOWN, // 53 + IM_UNKNOWN, // 54 + IM_UNKNOWN, // 55 + IM_UNKNOWN, // 56 + IM_UNKNOWN, // 57 + IM_UNKNOWN, // 58 + {"RDHWR", IT_R, ALU_OP_NOP, NOMEM, nullptr, + .flags = FLAGS_ALU_T_R_TD}, + IM_UNKNOWN, // 60 + IM_UNKNOWN, // 61 + IM_UNKNOWN, // 62 + IM_UNKNOWN, // 63 +}; + static const struct InstructionMap regimm_instruction_map[] = { {"BLTZ", IT_I, NOALU, NOMEM, nullptr, // BLTZ .flags = IMF_SUPPORTED | IMF_BJR_REQ_RS | IMF_BRANCH}, @@ -261,7 +330,8 @@ static const struct InstructionMap instruction_map[] = { IM_UNKNOWN, // 28 IM_UNKNOWN, // 29 IM_UNKNOWN, // 30 - IM_UNKNOWN, // 31 + {"SPECIAL3", IT_R, NOALU, NOMEM, special3_instruction_map, // + .flags = IMF_SUB_ENCODE(6, 0)}, {"LB", IT_I, ALU_OP_ADDU, AC_BYTE, nullptr, // LB .flags = FLAGS_ALU_I_LOAD}, {"LH", IT_I, ALU_OP_ADDU, AC_HALFWORD, nullptr, // LH diff --git a/qtmips_machine/machinedefs.h b/qtmips_machine/machinedefs.h index 526a05e..7d21f69 100644 --- a/qtmips_machine/machinedefs.h +++ b/qtmips_machine/machinedefs.h @@ -84,7 +84,8 @@ enum AluOp : std::uint8_t { ALU_OP_NOR, ALU_OP_SLT, ALU_OP_SLTU, - ALU_OP_LUI, // We don't care about exact index for this one + ALU_OP_LUI, + ALU_OP_BSHFL, ALU_OP_PASS_T, // Pass t argument without change for JAL ALU_OP_BREAK, ALU_OP_SYSCALL, |