diff options
Diffstat (limited to 'qtmips_machine/instruction.h')
| -rw-r--r-- | qtmips_machine/instruction.h | 50 |
1 files changed, 26 insertions, 24 deletions
diff --git a/qtmips_machine/instruction.h b/qtmips_machine/instruction.h index d8b9d00..bb6f410 100644 --- a/qtmips_machine/instruction.h +++ b/qtmips_machine/instruction.h @@ -45,30 +45,32 @@ namespace machine { enum InstructionFlags { IMF_NONE = 0, - IMF_SUPPORTED = 1L<<0, - IMF_MEMWRITE = 1L<<1, - IMF_MEMREAD = 1L<<2, - IMF_ALUSRC = 1L<<3, - IMF_REGD = 1L<<4, - IMF_REGWRITE = 1L<<5, - IMF_ZERO_EXTEND= 1L<<6, - IMF_PC_TO_R31 = 1L<<7, - IMF_BJR_REQ_RS = 1L<<8, - IMF_BJR_REQ_RT = 1L<<9, - IMF_ALU_SHIFT = 1L<<10, - IMF_MEM = 1L<<11, // This instruction is memory access instruction, - IMF_MEM_STORE = 1L<<12, - IMF_ALU_REQ_RS = 1L<<13, - IMF_ALU_REQ_RT = 1L<<14, - IMF_READ_HILO = 1L<<15, - IMF_WRITE_HILO = 1L<<16, - IMF_PC8_TO_RT = 1L<<17, - IMF_BRANCH = 1L<<18, - IMF_JUMP = 1L<<19, - IMF_BJ_NOT = 1L<<20, - IMF_BGTZ_BLEZ = 1L<<21, - IMF_NB_SKIP_DS = 1L<<22, // Skip instruction in delay slot if branch not taken - IMF_EXCEPTION = 1L<<23, + IMF_SUPPORTED = 1L<<0, /**< Instruction is supported */ + IMF_MEMWRITE = 1L<<1, /**< Write to the memory when memory stage is reached */ + IMF_MEMREAD = 1L<<2, /**< Read from the memory when memory stage is reached */ + IMF_ALUSRC = 1L<<3, /**< The second ALU source is immediate operand */ + IMF_REGD = 1L<<4, /**< RD field specifies register to be updated, if not + set and REGWRITE = 1, then destination reg in RT */ + IMF_REGWRITE = 1L<<5, /**< Instruction result (ALU or memory) is written to + register file */ + IMF_ZERO_EXTEND= 1L<<6, /**< Immediate operand is zero extended, else sign */ + IMF_PC_TO_R31 = 1L<<7, /**< PC value will be stored to register R31/RA */ + IMF_BJR_REQ_RS = 1L<<8, /**< Branch or jump operation reguires RS value */ + IMF_BJR_REQ_RT = 1L<<9, /**< Branch or jump operation requires RT value */ + IMF_ALU_SHIFT = 1L<<10, /**< Operation is shift of RT by RS or SHAMT */ + IMF_MEM = 1L<<11, /**< Instruction is memory access instruction */ + IMF_ALU_REQ_RS = 1L<<12, /**< Execution phase/ALU requires RS value */ + IMF_ALU_REQ_RT = 1L<<13, /**< Execution phase/ALU/mem requires RT value */ + IMF_READ_HILO = 1L<<14, /**< Operation reads value from HI or LO registers */ + IMF_WRITE_HILO = 1L<<15, /**< Operation writes value to HI and/or LO registers */ + IMF_PC8_TO_RT = 1L<<16, /**< PC value will be stored in RT specified register */ + IMF_BRANCH = 1L<<17, /**< Operation is conditional or unconditional branch + or branch and link when PC_TO_R31 is set */ + IMF_JUMP = 1L<<18, /**< Jump operation - J, JAL, JR or JALR */ + IMF_BJ_NOT = 1L<<19, /**< Negate condition for branch instructiion */ + IMF_BGTZ_BLEZ = 1L<<20, /**< BGTZ/BLEZ, else BEGT/BLTZ or BEQ, BNE when RT */ + IMF_NB_SKIP_DS = 1L<<21, /**< Skip instruction in delay slot if branch not taken */ + IMF_EXCEPTION = 1L<<22, /**< Instruction causes synchronous exception */ }; class Instruction { |