From cb0be9e2039569ee7d18657e8f675d1f8369b407 Mon Sep 17 00:00:00 2001 From: Flavian Kaufmann Date: Tue, 21 May 2024 13:50:28 +0200 Subject: restructured project --- rtl/src/immediate_extend.v | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) create mode 100644 rtl/src/immediate_extend.v (limited to 'rtl/src/immediate_extend.v') diff --git a/rtl/src/immediate_extend.v b/rtl/src/immediate_extend.v new file mode 100644 index 0000000..14a9a33 --- /dev/null +++ b/rtl/src/immediate_extend.v @@ -0,0 +1,22 @@ +module immediate_extend ( + input [31:0] instr, + input [2:0] imm_src, + + output reg [31:0] imm +); + +`include "include/consts.vh" + +always @ (*) begin + case (imm_src) + 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 + + +endmodule -- cgit v1.2.3