diff options
Diffstat (limited to 'src/immediate_extend.v')
| -rw-r--r-- | src/immediate_extend.v | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/src/immediate_extend.v b/src/immediate_extend.v index 404c43d..6e39e7d 100644 --- a/src/immediate_extend.v +++ b/src/immediate_extend.v @@ -5,15 +5,16 @@ module immediate_extend ( output reg [31:0] imm ); +`include "include/consts.vh" always @ (*) begin case (imm_src) - 3'b010: imm <= { {21{instr[31]}}, instr[30:20] }; // I - 3'b011: imm <= { {21{instr[31]}}, instr[30:25], instr[11:7] }; // S - 3'b100: imm <= { {20{instr[31]}}, instr[7], instr[30:25], instr[11:8], 1'b0 }; // B - 3'b101: imm <= { instr[31:12], 12'b0 }; // U - 3'b110: imm <= { {12{instr[31]}}, instr[19:12], instr[20], instr[30:21], 1'b0 }; // J - default: imm <= 32'b0; // Unknown + INSTR_FORMAT_I: imm <= { {21{instr[31]}}, instr[30:20] }; // I + INSTR_FORMAT_S: imm <= { {21{instr[31]}}, instr[30:25], instr[11:7] }; // S + INSTR_FORMAT_B: imm <= { {20{instr[31]}}, instr[7], instr[30:25], instr[11:8], 1'b0 }; // B + INSTR_FORMAT_U: imm <= { instr[31:12], 12'b0 }; // U + INSTR_FORMAT_J: imm <= { {12{instr[31]}}, instr[19:12], instr[20], instr[30:21], 1'b0 }; // J + default: imm <= 32'b0; // Unknown endcase end |