diff options
Diffstat (limited to 'decoder.v')
| -rw-r--r-- | decoder.v | 16 |
1 files changed, 8 insertions, 8 deletions
@@ -1,6 +1,6 @@ module decoder ( input [15:0] instr, - + output [3:0] aluOp, output [2:0] aluReg1, output [2:0] aluReg2, @@ -11,15 +11,15 @@ module decoder ( output [2:0] regDest, output regSetH, output regSetL, - + output [2:0] regAddr, output memReadB, output memReadW, output memWriteB, output memWriteW, - + output [5:0] setRegCond, // {should set when condition is true, Z condition, combiner, C condition}, condition = (00: must be 0, 01: must be 1, 1x: don't care) - + output [15:0] imm ); @@ -143,14 +143,14 @@ module decoder ( which_instr == 4'h4 ? 10'b0000100000 : which_instr == 4'h5 ? 10'b0000010000 : which_instr == 4'h6 ? 10'b0000001000 : - which_instr == 4'h7 ? 10'b0000000100 : + which_instr == 4'h7 ? 10'b0000000100 : which_instr == 4'h8 ? 10'b0000000010 : 10'b0000000001; // src/dest registers wire [2:0] reg0 = instr[11:9]; wire [2:0] reg1 = instr[7:5]; wire [2:0] reg2 = instr[4:2]; - + wire [7:0] imm_param = instr[7:0]; wire [15:0] ext_imm_param = {{8{instr[7]}}, instr[7:0]}; // sign-extended immediate parameter @@ -215,7 +215,7 @@ module decoder ( 1'b0; assign regDest = reg0; - + assign regSetH = instr_mov ? (mov_word | mov_dest_byte_high) : instr_movimm ? movimm_high : @@ -231,7 +231,7 @@ module decoder ( assign memReadW = instr_mov ? (mov_mem & (mov_mem_read & mov_word)) : 1'b0; assign memWriteB = instr_mov ? (mov_mem & (!mov_mem_read & !mov_word)) : 1'b0; assign memWriteW = instr_mov ? (mov_mem & (!mov_mem_read & mov_word)) : 1'b0; - + assign setRegCond = instr_mov ? ((!mov_mem | mov_mem_read) ? 6'b1_10_0_10 : 6'b000000) : instr_branch ? branch_set_cond : |