diff options
Diffstat (limited to 'src/alu_op_decode.v')
| -rw-r--r-- | src/alu_op_decode.v | 43 |
1 files changed, 0 insertions, 43 deletions
diff --git a/src/alu_op_decode.v b/src/alu_op_decode.v deleted file mode 100644 index 4523255..0000000 --- a/src/alu_op_decode.v +++ /dev/null @@ -1,43 +0,0 @@ -module alu_op_decode ( - input [6:0] opcode, - input [2:0] funct3, - input [6:0] funct7, - - input alu_ctrl, - - output reg [3:0] alu_op -); - -`include "include/consts.vh" - -always @ (*) begin - if (alu_ctrl == ALU_CTRL_ADD) begin - alu_op = ALU_OP_ADD; - end else if (opcode == OPCODE_REG || opcode == OPCODE_IMM) begin - case (funct3) - FUNCT3_ALU_ADD_SUB: alu_op = (opcode == OPCODE_REG && funct7 == FUNCT7_ALU_SUB) ? ALU_OP_SUB : ALU_OP_ADD; - FUNCT3_ALU_SLL: alu_op = ALU_OP_SLL; - FUNCT3_ALU_SLT: alu_op = ALU_OP_SLT; - FUNCT3_ALU_SLTU: alu_op = ALU_OP_SLTU; - FUNCT3_ALU_XOR: alu_op = ALU_OP_XOR; - FUNCT3_ALU_SR: alu_op = funct7 == FUNCT7_ALU_SRL ? ALU_OP_SRL : ALU_OP_SRA; - FUNCT3_ALU_OR: alu_op = ALU_OP_OR; - FUNCT3_ALU_AND: alu_op = ALU_OP_AND; - default: alu_op = ALU_OP_ADD; - endcase - end else if (opcode == OPCODE_BRANCH) begin - case (funct3) - FUNCT3_BRANCH_BEQ: alu_op = ALU_OP_SUB; - FUNCT3_BRANCH_BNE: alu_op = ALU_OP_SUB; - FUNCT3_BRANCH_BLT: alu_op = ALU_OP_SLT; - FUNCT3_BRANCH_BGE: alu_op = ALU_OP_SLT; - FUNCT3_BRANCH_BLTU: alu_op = ALU_OP_SLTU; - FUNCT3_BRANCH_BGEU: alu_op = ALU_OP_SLTU; - default: alu_op = ALU_OP_ADD; - endcase - end else begin - alu_op = ALU_OP_ADD; - end -end - -endmodule |