verilog/rtl/ibex_core/ibex_id_stage.v

module ibex_id_stage (
	clk_i,
	rst_ni,
	ctrl_busy_o,
	illegal_insn_o,
	instr_valid_i,
	instr_rdata_i,
	instr_rdata_alu_i,
	instr_rdata_c_i,
	instr_is_compressed_i,
	instr_bp_taken_i,
	instr_req_o,
	instr_first_cycle_id_o,
	instr_valid_clear_o,
	id_in_ready_o,
	icache_inval_o,
	branch_decision_i,
	pc_set_o,
	pc_set_spec_o,
	pc_mux_o,
	nt_branch_mispredict_o,
	nt_branch_addr_o,
	exc_pc_mux_o,
	exc_cause_o,
	illegal_c_insn_i,
	instr_fetch_err_i,
	instr_fetch_err_plus2_i,
	pc_id_i,
	ex_valid_i,
	lsu_resp_valid_i,
	alu_operator_ex_o,
	alu_operand_a_ex_o,
	alu_operand_b_ex_o,
	imd_val_we_ex_i,
	imd_val_d_ex_i,
	imd_val_q_ex_o,
	bt_a_operand_o,
	bt_b_operand_o,
	mult_en_ex_o,
	div_en_ex_o,
	mult_sel_ex_o,
	div_sel_ex_o,
	multdiv_operator_ex_o,
	multdiv_signed_mode_ex_o,
	multdiv_operand_a_ex_o,
	multdiv_operand_b_ex_o,
	multdiv_ready_id_o,
	eFPGA_en_o,
	eFPGA_operator_o,
	eFPGA_operand_a_o,
	eFPGA_operand_b_o,
	eFPGA_delay_o,
	csr_access_o,
	csr_op_o,
	csr_op_en_o,
	csr_save_if_o,
	csr_save_id_o,
	csr_save_wb_o,
	csr_restore_mret_id_o,
	csr_restore_dret_id_o,
	csr_save_cause_o,
	csr_mtval_o,
	priv_mode_i,
	csr_mstatus_tw_i,
	illegal_csr_insn_i,
	data_ind_timing_i,
	lsu_req_o,
	lsu_we_o,
	lsu_type_o,
	lsu_sign_ext_o,
	lsu_wdata_o,
	lsu_req_done_i,
	lsu_addr_incr_req_i,
	lsu_addr_last_i,
	csr_mstatus_mie_i,
	irq_pending_i,
	irqs_i,
	irq_nm_i,
	nmi_mode_o,
	lsu_load_err_i,
	lsu_store_err_i,
	debug_mode_o,
	debug_cause_o,
	debug_csr_save_o,
	debug_req_i,
	debug_single_step_i,
	debug_ebreakm_i,
	debug_ebreaku_i,
	trigger_match_i,
	result_ex_i,
	csr_rdata_i,
	rf_raddr_a_o,
	rf_rdata_a_i,
	rf_raddr_b_o,
	rf_rdata_b_i,
	rf_ren_a_o,
	rf_ren_b_o,
	rf_waddr_id_o,
	rf_wdata_id_o,
	rf_we_id_o,
	rf_rd_a_wb_match_o,
	rf_rd_b_wb_match_o,
	rf_waddr_wb_i,
	rf_wdata_fwd_wb_i,
	rf_write_wb_i,
	en_wb_o,
	instr_type_wb_o,
	instr_perf_count_id_o,
	ready_wb_i,
	outstanding_load_wb_i,
	outstanding_store_wb_i,
	perf_jump_o,
	perf_branch_o,
	perf_tbranch_o,
	perf_dside_wait_o,
	perf_mul_wait_o,
	perf_div_wait_o,
	instr_id_done_o
);
	parameter [0:0] RV32E = 0;
	parameter integer RV32M = 32'sd2;
	parameter integer RV32B = 32'sd0;
	parameter integer RV32Zk = 32'sd0;
	parameter [0:0] DataIndTiming = 1'b0;
	parameter [0:0] BranchTargetALU = 0;
	parameter [0:0] SpecBranch = 0;
	parameter [0:0] WritebackStage = 0;
	parameter [0:0] BranchPredictor = 0;
	input wire clk_i;
	input wire rst_ni;
	output wire ctrl_busy_o;
	output wire illegal_insn_o;
	input wire instr_valid_i;
	input wire [31:0] instr_rdata_i;
	input wire [31:0] instr_rdata_alu_i;
	input wire [15:0] instr_rdata_c_i;
	input wire instr_is_compressed_i;
	input wire instr_bp_taken_i;
	output wire instr_req_o;
	output wire instr_first_cycle_id_o;
	output wire instr_valid_clear_o;
	output wire id_in_ready_o;
	output wire icache_inval_o;
	input wire branch_decision_i;
	output wire pc_set_o;
	output wire pc_set_spec_o;
	output wire [2:0] pc_mux_o;
	output wire nt_branch_mispredict_o;
	output wire [31:0] nt_branch_addr_o;
	output wire [1:0] exc_pc_mux_o;
	output wire [5:0] exc_cause_o;
	input wire illegal_c_insn_i;
	input wire instr_fetch_err_i;
	input wire instr_fetch_err_plus2_i;
	input wire [31:0] pc_id_i;
	input wire ex_valid_i;
	input wire lsu_resp_valid_i;
	output wire [6:0] alu_operator_ex_o;
	output wire [31:0] alu_operand_a_ex_o;
	output wire [31:0] alu_operand_b_ex_o;
	input wire [1:0] imd_val_we_ex_i;
	input wire [67:0] imd_val_d_ex_i;
	output wire [67:0] imd_val_q_ex_o;
	output reg [31:0] bt_a_operand_o;
	output reg [31:0] bt_b_operand_o;
	output wire mult_en_ex_o;
	output wire div_en_ex_o;
	output wire mult_sel_ex_o;
	output wire div_sel_ex_o;
	output wire [1:0] multdiv_operator_ex_o;
	output wire [1:0] multdiv_signed_mode_ex_o;
	output wire [31:0] multdiv_operand_a_ex_o;
	output wire [31:0] multdiv_operand_b_ex_o;
	output wire multdiv_ready_id_o;
	output wire eFPGA_en_o;
	output wire [1:0] eFPGA_operator_o;
	output wire [31:0] eFPGA_operand_a_o;
	output wire [31:0] eFPGA_operand_b_o;
	output wire [3:0] eFPGA_delay_o;
	output wire csr_access_o;
	output wire [1:0] csr_op_o;
	output wire csr_op_en_o;
	output wire csr_save_if_o;
	output wire csr_save_id_o;
	output wire csr_save_wb_o;
	output wire csr_restore_mret_id_o;
	output wire csr_restore_dret_id_o;
	output wire csr_save_cause_o;
	output wire [31:0] csr_mtval_o;
	input wire [1:0] priv_mode_i;
	input wire csr_mstatus_tw_i;
	input wire illegal_csr_insn_i;
	input wire data_ind_timing_i;
	output wire lsu_req_o;
	output wire lsu_we_o;
	output wire [1:0] lsu_type_o;
	output wire lsu_sign_ext_o;
	output wire [31:0] lsu_wdata_o;
	input wire lsu_req_done_i;
	input wire lsu_addr_incr_req_i;
	input wire [31:0] lsu_addr_last_i;
	input wire csr_mstatus_mie_i;
	input wire irq_pending_i;
	input wire [17:0] irqs_i;
	input wire irq_nm_i;
	output wire nmi_mode_o;
	input wire lsu_load_err_i;
	input wire lsu_store_err_i;
	output wire debug_mode_o;
	output wire [2:0] debug_cause_o;
	output wire debug_csr_save_o;
	input wire debug_req_i;
	input wire debug_single_step_i;
	input wire debug_ebreakm_i;
	input wire debug_ebreaku_i;
	input wire trigger_match_i;
	input wire [31:0] result_ex_i;
	input wire [31:0] csr_rdata_i;
	output wire [4:0] rf_raddr_a_o;
	input wire [31:0] rf_rdata_a_i;
	output wire [4:0] rf_raddr_b_o;
	input wire [31:0] rf_rdata_b_i;
	output wire rf_ren_a_o;
	output wire rf_ren_b_o;
	output wire [4:0] rf_waddr_id_o;
	output reg [31:0] rf_wdata_id_o;
	output wire rf_we_id_o;
	output wire rf_rd_a_wb_match_o;
	output wire rf_rd_b_wb_match_o;
	input wire [4:0] rf_waddr_wb_i;
	input wire [31:0] rf_wdata_fwd_wb_i;
	input wire rf_write_wb_i;
	output wire en_wb_o;
	output wire [1:0] instr_type_wb_o;
	output wire instr_perf_count_id_o;
	input wire ready_wb_i;
	input wire outstanding_load_wb_i;
	input wire outstanding_store_wb_i;
	output wire perf_jump_o;
	output reg perf_branch_o;
	output wire perf_tbranch_o;
	output wire perf_dside_wait_o;
	output wire perf_mul_wait_o;
	output wire perf_div_wait_o;
	output wire instr_id_done_o;
	wire illegal_insn_dec;
	wire ebrk_insn;
	wire mret_insn_dec;
	wire dret_insn_dec;
	wire ecall_insn_dec;
	wire wfi_insn_dec;
	wire wb_exception;
	wire id_exception;
	wire branch_in_dec;
	reg branch_spec;
	wire branch_set_spec;
	wire branch_set_raw_spec;
	wire branch_set;
	wire branch_set_raw;
	reg branch_set_raw_d;
	reg branch_jump_set_done_q;
	wire branch_jump_set_done_d;
	reg branch_not_set;
	wire branch_taken;
	wire jump_in_dec;
	wire jump_set_dec;
	wire jump_set;
	reg jump_set_raw;
	wire instr_first_cycle;
	wire instr_executing_spec;
	wire instr_executing;
	wire instr_done;
	wire controller_run;
	wire stall_ld_hz;
	wire stall_mem;
	reg stall_multdiv;
	reg stall_branch;
	reg stall_jump;
	wire stall_id;
	wire stall_wb;
	wire flush_id;
	wire multicycle_done;
	reg eFPGA_stall;
	wire [31:0] imm_i_type;
	wire [31:0] imm_s_type;
	wire [31:0] imm_b_type;
	wire [31:0] imm_u_type;
	wire [31:0] imm_j_type;
	wire [31:0] zimm_rs1_type;
	wire [31:0] imm_a;
	reg [31:0] imm_b;
	wire rf_wdata_sel;
	wire rf_we_dec;
	reg rf_we_raw;
	wire rf_ren_a;
	wire rf_ren_b;
	wire rf_ren_a_dec;
	wire rf_ren_b_dec;
	assign rf_ren_a = ((instr_valid_i & ~instr_fetch_err_i) & ~illegal_insn_o) & rf_ren_a_dec;
	assign rf_ren_b = ((instr_valid_i & ~instr_fetch_err_i) & ~illegal_insn_o) & rf_ren_b_dec;
	assign rf_ren_a_o = rf_ren_a;
	assign rf_ren_b_o = rf_ren_b;
	wire [31:0] rf_rdata_a_fwd;
	wire [31:0] rf_rdata_b_fwd;
	wire [6:0] alu_operator;
	wire [1:0] alu_op_a_mux_sel;
	wire [1:0] alu_op_a_mux_sel_dec;
	wire alu_op_b_mux_sel;
	wire alu_op_b_mux_sel_dec;
	wire alu_multicycle_dec;
	reg stall_alu;
	reg [67:0] imd_val_q;
	wire [1:0] bt_a_mux_sel;
	wire [2:0] bt_b_mux_sel;
	wire imm_a_mux_sel;
	wire [2:0] imm_b_mux_sel;
	wire [2:0] imm_b_mux_sel_dec;
	wire mult_en_id;
	wire mult_en_dec;
	wire div_en_id;
	wire div_en_dec;
	wire multdiv_en_dec;
	wire [1:0] multdiv_operator;
	wire [1:0] multdiv_signed_mode;
	wire lsu_we;
	wire [1:0] lsu_type;
	wire lsu_sign_ext;
	wire lsu_req;
	wire lsu_req_dec;
	wire data_req_allowed;
	reg csr_pipe_flush;
	reg [31:0] alu_operand_a;
	wire [31:0] alu_operand_b;
	assign alu_op_a_mux_sel = (lsu_addr_incr_req_i ? 2'd1 : alu_op_a_mux_sel_dec);
	assign alu_op_b_mux_sel = (lsu_addr_incr_req_i ? 1'd1 : alu_op_b_mux_sel_dec);
	assign imm_b_mux_sel = (lsu_addr_incr_req_i ? 3'd6 : imm_b_mux_sel_dec);
	assign imm_a = (imm_a_mux_sel == 1'd0 ? zimm_rs1_type : {32 {1'sb0}});
	always @(*) begin : alu_operand_a_mux
		case (alu_op_a_mux_sel)
			2'd0: alu_operand_a = rf_rdata_a_fwd;
			2'd1: alu_operand_a = lsu_addr_last_i;
			2'd2: alu_operand_a = pc_id_i;
			2'd3: alu_operand_a = imm_a;
			default: alu_operand_a = pc_id_i;
		endcase
	end
	generate
		if (BranchTargetALU) begin : g_btalu_muxes
			always @(*) begin : bt_operand_a_mux
				case (bt_a_mux_sel)
					2'd0: bt_a_operand_o = rf_rdata_a_fwd;
					2'd2: bt_a_operand_o = pc_id_i;
					default: bt_a_operand_o = pc_id_i;
				endcase
			end
			always @(*) begin : bt_immediate_b_mux
				case (bt_b_mux_sel)
					3'd0: bt_b_operand_o = imm_i_type;
					3'd2: bt_b_operand_o = imm_b_type;
					3'd4: bt_b_operand_o = imm_j_type;
					3'd5: bt_b_operand_o = (instr_is_compressed_i ? 32'h00000002 : 32'h00000004);
					default: bt_b_operand_o = (instr_is_compressed_i ? 32'h00000002 : 32'h00000004);
				endcase
			end
			always @(*) begin : immediate_b_mux
				case (imm_b_mux_sel)
					3'd0: imm_b = imm_i_type;
					3'd1: imm_b = imm_s_type;
					3'd3: imm_b = imm_u_type;
					3'd5: imm_b = (instr_is_compressed_i ? 32'h00000002 : 32'h00000004);
					3'd6: imm_b = 32'h00000004;
					default: imm_b = 32'h00000004;
				endcase
			end
		end
		else begin : g_nobtalu
			wire [1:0] unused_a_mux_sel;
			wire [2:0] unused_b_mux_sel;
			assign unused_a_mux_sel = bt_a_mux_sel;
			assign unused_b_mux_sel = bt_b_mux_sel;
			wire [32:1] sv2v_tmp_FACAA;
			assign sv2v_tmp_FACAA = 1'sb0;
			always @(*) bt_a_operand_o = sv2v_tmp_FACAA;
			wire [32:1] sv2v_tmp_A4AF9;
			assign sv2v_tmp_A4AF9 = 1'sb0;
			always @(*) bt_b_operand_o = sv2v_tmp_A4AF9;
			always @(*) begin : immediate_b_mux
				case (imm_b_mux_sel)
					3'd0: imm_b = imm_i_type;
					3'd1: imm_b = imm_s_type;
					3'd2: imm_b = imm_b_type;
					3'd3: imm_b = imm_u_type;
					3'd4: imm_b = imm_j_type;
					3'd5: imm_b = (instr_is_compressed_i ? 32'h00000002 : 32'h00000004);
					3'd6: imm_b = 32'h00000004;
					default: imm_b = 32'h00000004;
				endcase
			end
		end
	endgenerate
	assign alu_operand_b = (alu_op_b_mux_sel == 1'd1 ? imm_b : rf_rdata_b_fwd);
	genvar i;
	generate
		for (i = 0; i < 2; i = i + 1) begin : gen_intermediate_val_reg
			always @(posedge clk_i or negedge rst_ni) begin : intermediate_val_reg
				if (!rst_ni)
					imd_val_q[(1 - i) * 34+:34] <= 1'sb0;
				else if (imd_val_we_ex_i[i])
					imd_val_q[(1 - i) * 34+:34] <= imd_val_d_ex_i[(1 - i) * 34+:34];
			end
		end
	endgenerate
	assign imd_val_q_ex_o = imd_val_q;
	assign rf_we_id_o = (rf_we_raw & instr_executing) & ~illegal_csr_insn_i;
	always @(*) begin : rf_wdata_id_mux
		case (rf_wdata_sel)
			1'd0: rf_wdata_id_o = result_ex_i;
			1'd1: rf_wdata_id_o = csr_rdata_i;
			default: rf_wdata_id_o = result_ex_i;
		endcase
	end
	wire eFPGA_int_en;
	wire [1:0] eFPGA_operator;
	wire [3:0] eFPGA_delay;
	assign eFPGA_en_o = eFPGA_int_en;
	assign eFPGA_operator_o = eFPGA_operator;
	assign eFPGA_delay_o = eFPGA_delay;
	ibex_decoder #(
		.RV32E(RV32E),
		.RV32M(RV32M),
		.RV32B(RV32B),
		.RV32Zk(RV32Zk),
		.BranchTargetALU(BranchTargetALU)
	) decoder_i(
		.clk_i(clk_i),
		.rst_ni(rst_ni),
		.illegal_insn_o(illegal_insn_dec),
		.ebrk_insn_o(ebrk_insn),
		.mret_insn_o(mret_insn_dec),
		.dret_insn_o(dret_insn_dec),
		.ecall_insn_o(ecall_insn_dec),
		.wfi_insn_o(wfi_insn_dec),
		.jump_set_o(jump_set_dec),
		.branch_taken_i(branch_taken),
		.icache_inval_o(icache_inval_o),
		.instr_first_cycle_i(instr_first_cycle),
		.instr_rdata_i(instr_rdata_i),
		.instr_rdata_alu_i(instr_rdata_alu_i),
		.illegal_c_insn_i(illegal_c_insn_i),
		.imm_a_mux_sel_o(imm_a_mux_sel),
		.imm_b_mux_sel_o(imm_b_mux_sel_dec),
		.bt_a_mux_sel_o(bt_a_mux_sel),
		.bt_b_mux_sel_o(bt_b_mux_sel),
		.imm_i_type_o(imm_i_type),
		.imm_s_type_o(imm_s_type),
		.imm_b_type_o(imm_b_type),
		.imm_u_type_o(imm_u_type),
		.imm_j_type_o(imm_j_type),
		.zimm_rs1_type_o(zimm_rs1_type),
		.rf_wdata_sel_o(rf_wdata_sel),
		.rf_we_o(rf_we_dec),
		.rf_raddr_a_o(rf_raddr_a_o),
		.rf_raddr_b_o(rf_raddr_b_o),
		.rf_waddr_o(rf_waddr_id_o),
		.rf_ren_a_o(rf_ren_a_dec),
		.rf_ren_b_o(rf_ren_b_dec),
		.alu_operator_o(alu_operator),
		.alu_op_a_mux_sel_o(alu_op_a_mux_sel_dec),
		.alu_op_b_mux_sel_o(alu_op_b_mux_sel_dec),
		.alu_multicycle_o(alu_multicycle_dec),
		.eFPGA_operator_o(eFPGA_operator),
		.eFPGA_int_en_o(eFPGA_int_en),
		.eFPGA_delay_o(eFPGA_delay),
		.mult_en_o(mult_en_dec),
		.div_en_o(div_en_dec),
		.mult_sel_o(mult_sel_ex_o),
		.div_sel_o(div_sel_ex_o),
		.multdiv_operator_o(multdiv_operator),
		.multdiv_signed_mode_o(multdiv_signed_mode),
		.csr_access_o(csr_access_o),
		.csr_op_o(csr_op_o),
		.data_req_o(lsu_req_dec),
		.data_we_o(lsu_we),
		.data_type_o(lsu_type),
		.data_sign_extension_o(lsu_sign_ext),
		.jump_in_dec_o(jump_in_dec),
		.branch_in_dec_o(branch_in_dec)
	);
	always @(*) begin : csr_pipeline_flushes
		csr_pipe_flush = 1'b0;
		if ((csr_op_en_o == 1'b1) && ((csr_op_o == 2'd1) || (csr_op_o == 2'd2))) begin
			if ((instr_rdata_i[31:20] == 12'h300) || (instr_rdata_i[31:20] == 12'h304))
				csr_pipe_flush = 1'b1;
		end
		else if ((csr_op_en_o == 1'b1) && (csr_op_o != 2'd0))
			if ((((instr_rdata_i[31:20] == 12'h7b0) || (instr_rdata_i[31:20] == 12'h7b1)) || (instr_rdata_i[31:20] == 12'h7b2)) || (instr_rdata_i[31:20] == 12'h7b3))
				csr_pipe_flush = 1'b1;
	end
	assign illegal_insn_o = instr_valid_i & (illegal_insn_dec | illegal_csr_insn_i);
	ibex_controller #(
		.WritebackStage(WritebackStage),
		.BranchPredictor(BranchPredictor)
	) controller_i(
		.clk_i(clk_i),
		.rst_ni(rst_ni),
		.ctrl_busy_o(ctrl_busy_o),
		.illegal_insn_i(illegal_insn_o),
		.ecall_insn_i(ecall_insn_dec),
		.mret_insn_i(mret_insn_dec),
		.dret_insn_i(dret_insn_dec),
		.wfi_insn_i(wfi_insn_dec),
		.ebrk_insn_i(ebrk_insn),
		.csr_pipe_flush_i(csr_pipe_flush),
		.instr_valid_i(instr_valid_i),
		.instr_i(instr_rdata_i),
		.instr_compressed_i(instr_rdata_c_i),
		.instr_is_compressed_i(instr_is_compressed_i),
		.instr_bp_taken_i(instr_bp_taken_i),
		.instr_fetch_err_i(instr_fetch_err_i),
		.instr_fetch_err_plus2_i(instr_fetch_err_plus2_i),
		.pc_id_i(pc_id_i),
		.instr_valid_clear_o(instr_valid_clear_o),
		.id_in_ready_o(id_in_ready_o),
		.controller_run_o(controller_run),
		.instr_req_o(instr_req_o),
		.pc_set_o(pc_set_o),
		.pc_set_spec_o(pc_set_spec_o),
		.pc_mux_o(pc_mux_o),
		.nt_branch_mispredict_o(nt_branch_mispredict_o),
		.exc_pc_mux_o(exc_pc_mux_o),
		.exc_cause_o(exc_cause_o),
		.lsu_addr_last_i(lsu_addr_last_i),
		.load_err_i(lsu_load_err_i),
		.store_err_i(lsu_store_err_i),
		.wb_exception_o(wb_exception),
		.id_exception_o(id_exception),
		.branch_set_i(branch_set),
		.branch_set_spec_i(branch_set_spec),
		.branch_not_set_i(branch_not_set),
		.jump_set_i(jump_set),
		.csr_mstatus_mie_i(csr_mstatus_mie_i),
		.irq_pending_i(irq_pending_i),
		.irqs_i(irqs_i),
		.irq_nm_i(irq_nm_i),
		.nmi_mode_o(nmi_mode_o),
		.csr_save_if_o(csr_save_if_o),
		.csr_save_id_o(csr_save_id_o),
		.csr_save_wb_o(csr_save_wb_o),
		.csr_restore_mret_id_o(csr_restore_mret_id_o),
		.csr_restore_dret_id_o(csr_restore_dret_id_o),
		.csr_save_cause_o(csr_save_cause_o),
		.csr_mtval_o(csr_mtval_o),
		.priv_mode_i(priv_mode_i),
		.csr_mstatus_tw_i(csr_mstatus_tw_i),
		.debug_mode_o(debug_mode_o),
		.debug_cause_o(debug_cause_o),
		.debug_csr_save_o(debug_csr_save_o),
		.debug_req_i(debug_req_i),
		.debug_single_step_i(debug_single_step_i),
		.debug_ebreakm_i(debug_ebreakm_i),
		.debug_ebreaku_i(debug_ebreaku_i),
		.trigger_match_i(trigger_match_i),
		.stall_id_i(stall_id),
		.stall_wb_i(stall_wb),
		.flush_id_o(flush_id),
		.ready_wb_i(ready_wb_i),
		.perf_jump_o(perf_jump_o),
		.perf_tbranch_o(perf_tbranch_o)
	);
	assign multdiv_en_dec = mult_en_dec | div_en_dec;
	assign lsu_req = (instr_executing ? data_req_allowed & lsu_req_dec : 1'b0);
	assign mult_en_id = (instr_executing ? mult_en_dec : 1'b0);
	assign div_en_id = (instr_executing ? div_en_dec : 1'b0);
	assign lsu_req_o = lsu_req;
	assign lsu_we_o = lsu_we;
	assign lsu_type_o = lsu_type;
	assign lsu_sign_ext_o = lsu_sign_ext;
	assign lsu_wdata_o = rf_rdata_b_fwd;
	assign csr_op_en_o = (csr_access_o & instr_executing) & instr_id_done_o;
	assign alu_operator_ex_o = alu_operator;
	assign alu_operand_a_ex_o = alu_operand_a;
	assign alu_operand_b_ex_o = alu_operand_b;
	assign mult_en_ex_o = mult_en_id;
	assign div_en_ex_o = div_en_id;
	assign multdiv_operator_ex_o = multdiv_operator;
	assign multdiv_signed_mode_ex_o = multdiv_signed_mode;
	assign multdiv_operand_a_ex_o = rf_rdata_a_fwd;
	assign multdiv_operand_b_ex_o = rf_rdata_b_fwd;
	generate
		if (BranchTargetALU && !DataIndTiming) begin : g_branch_set_direct
			assign branch_set_raw = branch_set_raw_d;
			assign branch_set_raw_spec = branch_spec;
		end
		else begin : g_branch_set_flop
			reg branch_set_raw_q;
			always @(posedge clk_i or negedge rst_ni)
				if (!rst_ni)
					branch_set_raw_q <= 1'b0;
				else
					branch_set_raw_q <= branch_set_raw_d;
			assign branch_set_raw = (BranchTargetALU && !data_ind_timing_i ? branch_set_raw_d : branch_set_raw_q);
			assign branch_set_raw_spec = (BranchTargetALU && !data_ind_timing_i ? branch_spec : branch_set_raw_q);
		end
	endgenerate
	assign branch_jump_set_done_d = ((branch_set_raw | jump_set_raw) | branch_jump_set_done_q) & ~instr_valid_clear_o;
	always @(posedge clk_i or negedge rst_ni)
		if (!rst_ni)
			branch_jump_set_done_q <= 1'b0;
		else
			branch_jump_set_done_q <= branch_jump_set_done_d;
	assign jump_set = jump_set_raw & ~branch_jump_set_done_q;
	assign branch_set = branch_set_raw & ~branch_jump_set_done_q;
	assign branch_set_spec = branch_set_raw_spec & ~branch_jump_set_done_q;
	generate
		if (DataIndTiming) begin : g_sec_branch_taken
			reg branch_taken_q;
			always @(posedge clk_i or negedge rst_ni)
				if (!rst_ni)
					branch_taken_q <= 1'b0;
				else
					branch_taken_q <= branch_decision_i;
			assign branch_taken = ~data_ind_timing_i | branch_taken_q;
		end
		else begin : g_nosec_branch_taken
			assign branch_taken = 1'b1;
		end
		if (BranchPredictor) begin : g_calc_nt_addr
			assign nt_branch_addr_o = pc_id_i + (instr_is_compressed_i ? 32'd2 : 32'd4);
		end
		else begin : g_n_calc_nt_addr
			assign nt_branch_addr_o = 32'd0;
		end
	endgenerate
	assign eFPGA_operand_a_o = rf_rdata_a_fwd;
	assign eFPGA_operand_b_o = rf_rdata_b_fwd;
	reg id_fsm_q;
	reg id_fsm_d;
	always @(posedge clk_i or negedge rst_ni) begin : id_pipeline_reg
		if (!rst_ni)
			id_fsm_q <= 1'd0;
		else if (instr_executing)
			id_fsm_q <= id_fsm_d;
	end
	always @(*) begin
		id_fsm_d = id_fsm_q;
		rf_we_raw = rf_we_dec;
		stall_multdiv = 1'b0;
		eFPGA_stall = 1'b0;
		stall_jump = 1'b0;
		stall_branch = 1'b0;
		stall_alu = 1'b0;
		branch_set_raw_d = 1'b0;
		branch_spec = 1'b0;
		branch_not_set = 1'b0;
		jump_set_raw = 1'b0;
		perf_branch_o = 1'b0;
		if (instr_executing_spec)
			case (id_fsm_q)
				1'd0:
					case (1'b1)
						lsu_req_dec:
							if (!WritebackStage)
								id_fsm_d = 1'd1;
							else if (~lsu_req_done_i)
								id_fsm_d = 1'd1;
						multdiv_en_dec:
							if (~ex_valid_i) begin
								id_fsm_d = 1'd1;
								rf_we_raw = 1'b0;
								stall_multdiv = 1'b1;
							end
						eFPGA_int_en:
							if (~ex_valid_i) begin
								id_fsm_d = 1'd1;
								rf_we_raw = 1'b0;
								eFPGA_stall = 1'b1;
							end
						branch_in_dec: begin
							id_fsm_d = (data_ind_timing_i || (!BranchTargetALU && branch_decision_i) ? 1'd1 : 1'd0);
							stall_branch = (~BranchTargetALU & branch_decision_i) | data_ind_timing_i;
							branch_set_raw_d = branch_decision_i | data_ind_timing_i;
							if (BranchPredictor)
								branch_not_set = ~branch_decision_i;
							branch_spec = (SpecBranch ? 1'b1 : branch_decision_i);
							perf_branch_o = 1'b1;
						end
						jump_in_dec: begin
							id_fsm_d = (BranchTargetALU ? 1'd0 : 1'd1);
							stall_jump = ~BranchTargetALU;
							jump_set_raw = jump_set_dec;
						end
						alu_multicycle_dec: begin
							stall_alu = 1'b1;
							id_fsm_d = 1'd1;
							rf_we_raw = 1'b0;
						end
						default: id_fsm_d = 1'd0;
					endcase
				1'd1: begin
					if (multdiv_en_dec)
						rf_we_raw = rf_we_dec & ex_valid_i;
					if (multicycle_done & ready_wb_i)
						id_fsm_d = 1'd0;
					else begin
						stall_multdiv = multdiv_en_dec;
						stall_branch = branch_in_dec;
						stall_jump = jump_in_dec;
						eFPGA_stall = eFPGA_int_en;
					end
				end
				default: id_fsm_d = 1'd0;
			endcase
	end
	assign multdiv_ready_id_o = ready_wb_i;
	assign stall_id = (((((stall_ld_hz | stall_mem) | stall_multdiv) | stall_jump) | stall_branch) | stall_alu) | eFPGA_stall;
	assign instr_done = (~stall_id & ~flush_id) & instr_executing;
	assign instr_first_cycle = instr_valid_i & (id_fsm_q == 1'd0);
	assign instr_first_cycle_id_o = instr_first_cycle;
	generate
		if (WritebackStage) begin : gen_stall_mem
			wire rf_rd_a_wb_match;
			wire rf_rd_b_wb_match;
			wire rf_rd_a_hz;
			wire rf_rd_b_hz;
			wire outstanding_memory_access;
			wire instr_kill;
			assign multicycle_done = (lsu_req_dec ? ~stall_mem : ex_valid_i);
			assign outstanding_memory_access = (outstanding_load_wb_i | outstanding_store_wb_i) & ~lsu_resp_valid_i;
			assign data_req_allowed = ~outstanding_memory_access;
			assign instr_kill = ((instr_fetch_err_i | wb_exception) | id_exception) | ~controller_run;
			assign instr_executing_spec = ((instr_valid_i & ~instr_fetch_err_i) & controller_run) & ~stall_ld_hz;
			assign instr_executing = ((instr_valid_i & ~instr_kill) & ~stall_ld_hz) & ~outstanding_memory_access;
			assign stall_mem = instr_valid_i & (outstanding_memory_access | (lsu_req_dec & ~lsu_req_done_i));
			assign rf_rd_a_wb_match = (rf_waddr_wb_i == rf_raddr_a_o) & |rf_raddr_a_o;
			assign rf_rd_b_wb_match = (rf_waddr_wb_i == rf_raddr_b_o) & |rf_raddr_b_o;
			assign rf_rd_a_wb_match_o = rf_rd_a_wb_match;
			assign rf_rd_b_wb_match_o = rf_rd_b_wb_match;
			assign rf_rd_a_hz = rf_rd_a_wb_match & rf_ren_a;
			assign rf_rd_b_hz = rf_rd_b_wb_match & rf_ren_b;
			assign rf_rdata_a_fwd = (rf_rd_a_wb_match & rf_write_wb_i ? rf_wdata_fwd_wb_i : rf_rdata_a_i);
			assign rf_rdata_b_fwd = (rf_rd_b_wb_match & rf_write_wb_i ? rf_wdata_fwd_wb_i : rf_rdata_b_i);
			assign stall_ld_hz = outstanding_load_wb_i & (rf_rd_a_hz | rf_rd_b_hz);
			assign instr_type_wb_o = (~lsu_req_dec ? 2'd2 : (lsu_we ? 2'd1 : 2'd0));
			assign instr_id_done_o = en_wb_o & ready_wb_i;
			assign stall_wb = en_wb_o & ~ready_wb_i;
			assign perf_dside_wait_o = (instr_valid_i & ~instr_kill) & (outstanding_memory_access | stall_ld_hz);
		end
		else begin : gen_no_stall_mem
			assign multicycle_done = (lsu_req_dec ? lsu_resp_valid_i : ex_valid_i);
			assign data_req_allowed = instr_first_cycle;
			assign stall_mem = instr_valid_i & (lsu_req_dec & (~lsu_resp_valid_i | instr_first_cycle));
			assign stall_ld_hz = 1'b0;
			assign instr_executing_spec = (instr_valid_i & ~instr_fetch_err_i) & controller_run;
			assign instr_executing = instr_executing_spec;
			assign rf_rdata_a_fwd = rf_rdata_a_i;
			assign rf_rdata_b_fwd = rf_rdata_b_i;
			assign rf_rd_a_wb_match_o = 1'b0;
			assign rf_rd_b_wb_match_o = 1'b0;
			wire unused_data_req_done_ex;
			wire [4:0] unused_rf_waddr_wb;
			wire unused_rf_write_wb;
			wire unused_outstanding_load_wb;
			wire unused_outstanding_store_wb;
			wire unused_wb_exception;
			wire [31:0] unused_rf_wdata_fwd_wb;
			wire unused_id_exception;
			assign unused_data_req_done_ex = lsu_req_done_i;
			assign unused_rf_waddr_wb = rf_waddr_wb_i;
			assign unused_rf_write_wb = rf_write_wb_i;
			assign unused_outstanding_load_wb = outstanding_load_wb_i;
			assign unused_outstanding_store_wb = outstanding_store_wb_i;
			assign unused_wb_exception = wb_exception;
			assign unused_rf_wdata_fwd_wb = rf_wdata_fwd_wb_i;
			assign unused_id_exception = id_exception;
			assign instr_type_wb_o = 2'd2;
			assign stall_wb = 1'b0;
			assign perf_dside_wait_o = (instr_executing & lsu_req_dec) & ~lsu_resp_valid_i;
			assign instr_id_done_o = instr_done;
		end
	endgenerate
	assign instr_perf_count_id_o = (((~ebrk_insn & ~ecall_insn_dec) & ~illegal_insn_dec) & ~illegal_csr_insn_i) & ~instr_fetch_err_i;
	assign en_wb_o = instr_done;
	assign perf_mul_wait_o = stall_multdiv & mult_en_dec;
	assign perf_div_wait_o = stall_multdiv & div_en_dec;
endmodule