define_alu_control.vh

/* 
 * this header defines the control signal of ALU from decoder
 * 这一个文件头定义了从译码器到ALU的控制信号宏
 */
 
// logic instruction
`define SIG_ALU_AND     5'b00_000
`define SIG_ALU_OR      5'b00_001
`define SIG_ALU_XOR     5'b00_010
`define SIG_ALU_NOR     5'b00_011
`define SIG_ALU_LUI     5'b00_100
// shift instruction
`define SIG_ALU_SLL     5'b00_101
`define SIG_ALU_SRL     5'b00_110
`define SIG_ALU_SRA     5'b00_111
`define SIG_ALU_SLLV    5'b01_000
`define SIG_ALU_SRLV    5'b01_001
`define SIG_ALU_SRAV    5'b01_010

// move 
`define ALU_MFHI        5'b01_011
`define ALU_MFLO        5'b01_100
`define ALU_MTHI        5'b01_101
`define ALU_MTLO        5'b01_110

// arith
`define ALU_ADD         5'b01_111
`define ALU_ADDU        5'b10_000
`define ALU_SUB         5'b10_001
`define ALU_SUBU        5'b10_010
`define ALU_SLT         5'b10_011
`define ALU_SLTU        5'b10_100
`define ALU_MULT        5'b10_101
`define ALU_MULTU       5'b10_110
// fail
`define SIG_ALU_FAIL    5'b11_111