| |
| `include "fwrisc_exec_formal_defines.svh" |
| |
| |
| module fwrisc_exec_formal_csr_test( |
| input clock, |
| input reset, |
| output decode_valid, |
| input instr_complete, |
| |
| input[31:0] pc, |
| |
| // Indicates whether the instruction is compressed |
| output reg instr_c, |
| |
| output reg[4:0] op_type, |
| |
| output reg[31:0] op_a, |
| output reg[31:0] op_b, |
| output reg[5:0] op, |
| output reg[31:0] op_c, |
| output reg[5:0] rd, |
| output reg[31:0] mtvec, |
| input dvalid, |
| output reg[31:0] drdata, |
| output reg dready |
| |
| ); |
| `include "fwrisc_op_type.svh" |
| `include "fwrisc_alu_op.svh" |
| |
| reg[1:0] state; |
| reg decode_valid_r; |
| wire instr_c_w = `anyconst; |
| wire cond = `anyconst; |
| wire[1:0] op_w = `anyconst; |
| wire[31:0] value = `anyconst; |
| wire[11:0] branch = `anyconst; |
| wire[31:1] jump_base = `anyconst; |
| wire[21:1] jump_off = `anyconst; |
| wire[5:0] rd_w; |
| assign rd_w[5] = 0; |
| assign rd_w[4:0] = `anyconst; |
| wire[5:0] csr_w; |
| assign csr_w[5] = 1; |
| assign csr_w[4:0] = `anyconst; |
| wire[31:0] op_a_w = `anyconst; |
| wire[31:0] op_b_w = `anyconst; |
| |
| assign decode_valid = (decode_valid_r && !instr_complete); |
| |
| always @(posedge clock) begin |
| if (reset) begin |
| state <= 0; |
| instr_c <= 0; |
| op_type <= OP_TYPE_CSR; |
| op_a <= 0; |
| op_b <= 0; |
| op <= OP_OPA; |
| op_c <= 0; |
| rd <= 0; |
| decode_valid_r <= 0; |
| mtvec <= 0; |
| end else begin |
| case (state) |
| 0: begin |
| // Send out a new instruction |
| decode_valid_r <= 1; |
| instr_c <= instr_c_w; |
| case (op_w) |
| 2'b00: op <= OP_OPA; // store regs[rs1] to CSR |
| 2'b01: op <= OP_OR; // set regs[csr] <= regs[csr] | regs[rs1] |
| default: op <= OP_CLR; // set regs[csr] <= regs[csr] | regs[rs1] |
| endcase |
| rd <= rd_w; |
| op_a <= op_a_w; |
| op_b <= op_b_w; |
| rd <= rd_w; |
| op_c <= csr_w; |
| end |
| 1: begin |
| if (instr_complete) begin |
| decode_valid_r <= 0; |
| state <= 0; |
| end |
| end |
| endcase |
| |
| `ifdef FORMAL |
| assert(s_eventually instr_complete); |
| `endif |
| end |
| end |
| |
| |
| |
| endmodule |