1836 lines
72 KiB
Systemverilog
1836 lines
72 KiB
Systemverilog
// SPDX-License-Identifier: Apache-2.0
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// Copyright 2020 Western Digital Corporation or its affiliates.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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module el2_dec_decode_ctl
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import el2_pkg::*;
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#(
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`include "el2_param.vh"
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)
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(
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input logic dec_tlu_trace_disable,
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input logic dec_debug_valid_d,
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input logic dec_tlu_flush_extint, // Flush external interrupt
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input logic dec_tlu_force_halt, // invalidate nonblock load cam on a force halt event
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output logic dec_extint_stall, // Stall from external interrupt
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input logic [15:0] ifu_i0_cinst, // 16b compressed instruction
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output logic [31:0] dec_i0_inst_wb, // 32b instruction at wb+1 for trace encoder
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output logic [31:1] dec_i0_pc_wb, // 31b pc at wb+1 for trace encoder
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input logic lsu_nonblock_load_valid_m, // valid nonblock load at m
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input logic [pt.LSU_NUM_NBLOAD_WIDTH-1:0] lsu_nonblock_load_tag_m, // -> corresponding tag
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input logic lsu_nonblock_load_inv_r, // invalidate request for nonblock load r
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input logic [pt.LSU_NUM_NBLOAD_WIDTH-1:0] lsu_nonblock_load_inv_tag_r, // -> corresponding tag
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input logic lsu_nonblock_load_data_valid, // valid nonblock load data back
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input logic lsu_nonblock_load_data_error, // nonblock load bus error
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input logic [pt.LSU_NUM_NBLOAD_WIDTH-1:0] lsu_nonblock_load_data_tag, // -> corresponding tag
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input logic [3:0] dec_i0_trigger_match_d, // i0 decode trigger matches
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input logic dec_tlu_wr_pause_r, // pause instruction at r
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input logic dec_tlu_pipelining_disable, // pipeline disable - presync, i0 decode only
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input logic [3:0] lsu_trigger_match_m, // lsu trigger matches
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input logic lsu_pmu_misaligned_m, // perf mon: load/store misalign
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input logic dec_tlu_debug_stall, // debug stall decode
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input logic dec_tlu_flush_leak_one_r, // leak1 instruction
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input logic dec_debug_fence_d, // debug fence instruction
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input logic [1:0] dbg_cmd_wrdata, // disambiguate fence, fence_i
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input logic dec_i0_icaf_d, // icache access fault
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input logic dec_i0_icaf_second_d, // i0 instruction access fault on second 2B of 4B inst
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input logic [1:0] dec_i0_icaf_type_d, // i0 instruction access fault type
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input logic dec_i0_dbecc_d, // icache/iccm double-bit error
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input el2_br_pkt_t dec_i0_brp, // branch packet
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input logic [pt.BTB_ADDR_HI:pt.BTB_ADDR_LO] dec_i0_bp_index, // i0 branch index
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input logic [pt.BHT_GHR_SIZE-1:0] dec_i0_bp_fghr, // BP FGHR
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input logic [pt.BTB_BTAG_SIZE-1:0] dec_i0_bp_btag, // BP tag
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input logic [$clog2(pt.BTB_SIZE)-1:0] dec_i0_bp_fa_index, // Fully associt btb index
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input logic lsu_idle_any, // lsu idle: if fence instr & ~lsu_idle then stall decode
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input logic lsu_load_stall_any, // stall any load at decode
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input logic lsu_store_stall_any, // stall any store at decode
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input logic dma_dccm_stall_any, // stall any load/store at decode
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input logic exu_div_wren, // nonblocking divide write enable to GPR.
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input logic dec_tlu_i0_kill_writeb_wb, // I0 is flushed, don't writeback any results to arch state
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input logic dec_tlu_flush_lower_wb, // trap lower flush
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input logic dec_tlu_i0_kill_writeb_r, // I0 is flushed, don't writeback any results to arch state
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input logic dec_tlu_flush_lower_r, // trap lower flush
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input logic dec_tlu_flush_pause_r, // don't clear pause state on initial lower flush
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input logic dec_tlu_presync_d, // CSR read needs to be presync'd
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input logic dec_tlu_postsync_d, // CSR ops that need to be postsync'd
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input logic dec_i0_pc4_d, // inst is 4B inst else 2B
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input logic [31:0] dec_csr_rddata_d, // csr read data at wb
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input logic dec_csr_legal_d, // csr indicates legal operation
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input logic [31:0] exu_csr_rs1_x, // rs1 for csr instr
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input logic [31:0] lsu_result_m, // load result
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input logic [31:0] lsu_result_corr_r, // load result - corrected data for writing gpr's, not for bypassing
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input logic exu_flush_final, // lower flush or i0 flush at X or D
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input logic [31:1] exu_i0_pc_x, // pcs at e1
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input logic [31:0] dec_i0_instr_d, // inst at decode
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input logic dec_ib0_valid_d, // inst valid at decode
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input logic [31:0] exu_i0_result_x, // from primary alu's
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input logic clk, // Clock only while core active. Through one clock header. For flops with second clock header built in. Connected to ACTIVE_L2CLK.
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input logic active_clk, // Clock only while core active. Through two clock headers. For flops without second clock header built in.
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input logic free_l2clk, // Clock always. Through one clock header. For flops with second header built in.
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input logic clk_override, // Override non-functional clock gating
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input logic rst_l, // Flop reset
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output logic dec_i0_rs1_en_d, // rs1 enable at decode
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output logic dec_i0_rs2_en_d, // rs2 enable at decode
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output logic [4:0] dec_i0_rs1_d, // rs1 logical source
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output logic [4:0] dec_i0_rs2_d, // rs2 logical source
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output logic [31:0] dec_i0_immed_d, // 32b immediate data decode
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output logic [12:1] dec_i0_br_immed_d, // 12b branch immediate
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output el2_alu_pkt_t i0_ap, // alu packets
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output logic dec_i0_decode_d, // i0 decode
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output logic dec_i0_alu_decode_d, // decode to D-stage alu
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output logic dec_i0_branch_d, // Branch in D-stage
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output logic [4:0] dec_i0_waddr_r, // i0 logical source to write to gpr's
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output logic dec_i0_wen_r, // i0 write enable
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output logic [31:0] dec_i0_wdata_r, // i0 write data
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output logic dec_i0_select_pc_d, // i0 select pc for rs1 - branches
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output logic [3:0] dec_i0_rs1_bypass_en_d, // i0 rs1 bypass enable
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output logic [3:0] dec_i0_rs2_bypass_en_d, // i0 rs2 bypass enable
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output logic [31:0] dec_i0_result_r, // Result R-stage
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output el2_lsu_pkt_t lsu_p, // load/store packet
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output logic dec_qual_lsu_d, // LSU instruction at D. Use to quiet LSU operands
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output el2_mul_pkt_t mul_p, // multiply packet
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output el2_div_pkt_t div_p, // divide packet
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output logic [4:0] div_waddr_wb, // DIV write address to GPR
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output logic dec_div_cancel, // cancel the divide operation
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output logic dec_lsu_valid_raw_d,
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output logic [11:0] dec_lsu_offset_d,
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output logic dec_csr_ren_d, // valid csr decode
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output logic dec_csr_wen_unq_d, // valid csr with write - for csr legal
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output logic dec_csr_any_unq_d, // valid csr - for csr legal
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output logic [11:0] dec_csr_rdaddr_d, // read address for csr
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output logic dec_csr_wen_r, // csr write enable at r
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output logic [11:0] dec_csr_wraddr_r, // write address for csr
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output logic [31:0] dec_csr_wrdata_r, // csr write data at r
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output logic dec_csr_stall_int_ff, // csr is mie/mstatus
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output dec_tlu_i0_valid_r, // i0 valid inst at c
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output el2_trap_pkt_t dec_tlu_packet_r, // trap packet
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output logic [31:1] dec_tlu_i0_pc_r, // i0 trap pc
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output logic [31:0] dec_illegal_inst, // illegal inst
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output logic [31:1] pred_correct_npc_x, // npc e2 if the prediction is correct
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output el2_predict_pkt_t dec_i0_predict_p_d, // i0 predict packet decode
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output logic [pt.BHT_GHR_SIZE-1:0] i0_predict_fghr_d, // i0 predict fghr
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output logic [pt.BTB_ADDR_HI:pt.BTB_ADDR_LO] i0_predict_index_d, // i0 predict index
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output logic [pt.BTB_BTAG_SIZE-1:0] i0_predict_btag_d, // i0_predict branch tag
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output logic [$clog2(pt.BTB_SIZE)-1:0] dec_fa_error_index, // Fully associt btb error index
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output logic [1:0] dec_data_en, // clock-gating logic
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output logic [1:0] dec_ctl_en,
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output logic dec_pmu_instr_decoded, // number of instructions decode this cycle encoded
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output logic dec_pmu_decode_stall, // decode is stalled
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output logic dec_pmu_presync_stall, // decode has presync stall
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output logic dec_pmu_postsync_stall, // decode has postsync stall
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output logic dec_nonblock_load_wen, // write enable for nonblock load
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output logic [4:0] dec_nonblock_load_waddr, // logical write addr for nonblock load
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output logic dec_pause_state, // core in pause state
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output logic dec_pause_state_cg, // pause state for clock-gating
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output logic dec_div_active, // non-block divide is active
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input logic scan_mode
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);
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el2_dec_pkt_t i0_dp_raw, i0_dp;
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logic [31:0] i0;
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logic i0_valid_d;
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logic [31:0] i0_result_r;
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logic [2:0] i0_rs1bypass, i0_rs2bypass;
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logic i0_jalimm20;
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logic i0_uiimm20;
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logic lsu_decode_d;
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logic [31:0] i0_immed_d;
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logic i0_presync;
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logic i0_postsync;
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logic postsync_stall;
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logic ps_stall;
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logic prior_inflight, prior_inflight_wb;
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logic csr_clr_d, csr_set_d, csr_write_d;
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logic csr_clr_x,csr_set_x,csr_write_x,csr_imm_x;
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logic [31:0] csr_mask_x;
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logic [31:0] write_csr_data_x;
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logic [31:0] write_csr_data_in;
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logic [31:0] write_csr_data;
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logic csr_data_wen;
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logic [4:0] csrimm_x;
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logic [31:0] csr_rddata_x;
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logic mul_decode_d;
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logic div_decode_d;
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logic div_e1_to_r;
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logic div_flush;
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logic div_active_in;
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logic div_active;
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logic i0_nonblock_div_stall;
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logic i0_div_prior_div_stall;
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logic nonblock_div_cancel;
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logic i0_legal;
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logic shift_illegal;
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logic illegal_inst_en;
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logic illegal_lockout_in, illegal_lockout;
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logic i0_legal_decode_d;
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logic i0_exulegal_decode_d, i0_exudecode_d, i0_exublock_d;
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logic [12:1] last_br_immed_d;
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logic i0_rs1_depend_i0_x, i0_rs1_depend_i0_r;
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logic i0_rs2_depend_i0_x, i0_rs2_depend_i0_r;
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logic i0_div_decode_d;
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logic i0_load_block_d;
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logic [1:0] i0_rs1_depth_d, i0_rs2_depth_d;
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logic i0_load_stall_d;
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logic i0_store_stall_d;
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logic i0_predict_nt, i0_predict_t;
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logic i0_notbr_error, i0_br_toffset_error;
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logic i0_ret_error;
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logic i0_br_error;
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logic i0_br_error_all;
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logic [11:0] i0_br_offset;
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logic [20:1] i0_pcall_imm; // predicted jal's
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logic i0_pcall_12b_offset;
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logic i0_pcall_raw;
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logic i0_pcall_case;
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logic i0_pcall;
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logic i0_pja_raw;
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logic i0_pja_case;
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logic i0_pja;
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logic i0_pret_case;
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logic i0_pret_raw, i0_pret;
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logic i0_jal; // jal's that are not predicted
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logic i0_predict_br;
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logic store_data_bypass_d, store_data_bypass_m;
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el2_class_pkt_t i0_rs1_class_d, i0_rs2_class_d;
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el2_class_pkt_t i0_d_c, i0_x_c, i0_r_c;
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logic i0_ap_pc2, i0_ap_pc4;
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logic i0_rd_en_d;
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logic load_ldst_bypass_d;
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logic leak1_i0_stall_in, leak1_i0_stall;
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logic leak1_i1_stall_in, leak1_i1_stall;
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logic leak1_mode;
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logic i0_csr_write_only_d;
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logic prior_inflight_x, prior_inflight_eff;
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logic any_csr_d;
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logic prior_csr_write;
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logic [3:0] i0_pipe_en;
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logic i0_r_ctl_en, i0_x_ctl_en, i0_wb_ctl_en;
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logic i0_x_data_en, i0_r_data_en, i0_wb_data_en;
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logic debug_fence_i;
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logic debug_fence;
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logic i0_csr_write;
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logic presync_stall;
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logic i0_instr_error;
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logic i0_icaf_d;
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logic clear_pause;
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logic pause_state_in, pause_state;
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logic pause_stall;
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logic i0_brp_valid;
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logic nonblock_load_cancel;
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logic lsu_idle;
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logic lsu_pmu_misaligned_r;
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logic csr_ren_qual_d;
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logic csr_read_x;
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logic i0_block_d;
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logic i0_block_raw_d; // This is use to create the raw valid
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logic ps_stall_in;
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logic [31:0] i0_result_x;
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el2_dest_pkt_t d_d, x_d, r_d, wbd;
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el2_dest_pkt_t x_d_in, r_d_in;
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el2_trap_pkt_t d_t, x_t, x_t_in, r_t_in, r_t;
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logic [3:0] lsu_trigger_match_r;
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logic [31:1] dec_i0_pc_r;
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logic csr_read, csr_write;
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logic i0_br_unpred;
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logic nonblock_load_valid_m_delay;
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logic i0_wen_r;
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logic tlu_wr_pause_r1;
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logic tlu_wr_pause_r2;
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logic flush_final_r;
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logic bitmanip_zbb_legal;
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logic bitmanip_zbs_legal;
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logic bitmanip_zbe_legal;
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logic bitmanip_zbc_legal;
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logic bitmanip_zbp_legal;
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logic bitmanip_zbr_legal;
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logic bitmanip_zbf_legal;
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logic bitmanip_zba_legal;
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logic bitmanip_zbb_zbp_legal;
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logic bitmanip_zbp_zbe_zbf_legal;
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logic bitmanip_zbb_zbp_zbe_zbf_legal;
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logic bitmanip_legal;
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logic data_gate_en;
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logic data_gate_clk;
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localparam NBLOAD_SIZE = pt.LSU_NUM_NBLOAD;
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localparam NBLOAD_SIZE_MSB = int'(pt.LSU_NUM_NBLOAD)-1;
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localparam NBLOAD_TAG_MSB = pt.LSU_NUM_NBLOAD_WIDTH-1;
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logic cam_write, cam_inv_reset, cam_data_reset;
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logic [NBLOAD_TAG_MSB:0] cam_write_tag, cam_inv_reset_tag, cam_data_reset_tag;
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logic [NBLOAD_SIZE_MSB:0] cam_wen;
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logic [NBLOAD_TAG_MSB:0] load_data_tag;
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logic [NBLOAD_SIZE_MSB:0] nonblock_load_write;
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el2_load_cam_pkt_t [NBLOAD_SIZE_MSB:0] cam;
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el2_load_cam_pkt_t [NBLOAD_SIZE_MSB:0] cam_in;
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el2_load_cam_pkt_t [NBLOAD_SIZE_MSB:0] cam_raw;
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logic [4:0] nonblock_load_rd;
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logic i0_nonblock_load_stall;
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logic i0_nonblock_boundary_stall;
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logic i0_rs1_nonblock_load_bypass_en_d, i0_rs2_nonblock_load_bypass_en_d;
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logic i0_load_kill_wen_r;
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logic found;
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logic [NBLOAD_SIZE_MSB:0] cam_inv_reset_val, cam_data_reset_val;
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logic debug_fence_raw;
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logic [31:0] i0_result_r_raw;
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logic [31:0] i0_result_corr_r;
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logic [12:1] last_br_immed_x;
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logic [31:0] i0_inst_d;
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logic [31:0] i0_inst_x;
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logic [31:0] i0_inst_r;
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logic [31:0] i0_inst_wb_in;
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logic [31:0] i0_inst_wb;
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logic [31:1] i0_pc_wb;
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logic i0_wb_en;
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logic trace_enable;
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logic debug_valid_x;
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el2_inst_pkt_t i0_itype;
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el2_reg_pkt_t i0r;
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rvdffie #(8) misc1ff (.*,
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.clk(free_l2clk),
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.din( {leak1_i1_stall_in,leak1_i0_stall_in,dec_tlu_flush_extint,pause_state_in ,dec_tlu_wr_pause_r, tlu_wr_pause_r1,illegal_lockout_in,ps_stall_in}),
|
|
.dout({leak1_i1_stall, leak1_i0_stall, dec_extint_stall, pause_state, tlu_wr_pause_r1,tlu_wr_pause_r2,illegal_lockout, ps_stall })
|
|
);
|
|
|
|
rvdffie #(8) misc2ff (.*,
|
|
.clk(free_l2clk),
|
|
.din( {lsu_trigger_match_m[3:0],lsu_pmu_misaligned_m,div_active_in,exu_flush_final, dec_debug_valid_d}),
|
|
.dout({lsu_trigger_match_r[3:0],lsu_pmu_misaligned_r,div_active, flush_final_r, debug_valid_x})
|
|
);
|
|
|
|
if(pt.BTB_ENABLE==1) begin
|
|
// branch prediction
|
|
|
|
|
|
// in leak1_mode, ignore any predictions for i0, treat branch as if we haven't seen it before
|
|
// in leak1 mode, also ignore branch errors for i0
|
|
assign i0_brp_valid = dec_i0_brp.valid & ~leak1_mode & ~i0_icaf_d;
|
|
|
|
assign dec_i0_predict_p_d.misp = '0;
|
|
assign dec_i0_predict_p_d.ataken = '0;
|
|
assign dec_i0_predict_p_d.boffset = '0;
|
|
|
|
assign dec_i0_predict_p_d.pcall = i0_pcall; // don't mark as pcall if branch error
|
|
assign dec_i0_predict_p_d.pja = i0_pja;
|
|
assign dec_i0_predict_p_d.pret = i0_pret;
|
|
assign dec_i0_predict_p_d.prett[31:1] = dec_i0_brp.prett[31:1];
|
|
assign dec_i0_predict_p_d.pc4 = dec_i0_pc4_d;
|
|
assign dec_i0_predict_p_d.hist[1:0] = dec_i0_brp.hist[1:0];
|
|
assign dec_i0_predict_p_d.valid = i0_brp_valid & i0_legal_decode_d;
|
|
assign i0_notbr_error = i0_brp_valid & ~(i0_dp_raw.condbr | i0_pcall_raw | i0_pja_raw | i0_pret_raw);
|
|
|
|
// no toffset error for a pret
|
|
assign i0_br_toffset_error = i0_brp_valid & dec_i0_brp.hist[1] & (dec_i0_brp.toffset[11:0] != i0_br_offset[11:0]) & ~i0_pret_raw;
|
|
assign i0_ret_error = i0_brp_valid & (dec_i0_brp.ret ^ i0_pret_raw);
|
|
assign i0_br_error = dec_i0_brp.br_error | i0_notbr_error | i0_br_toffset_error | i0_ret_error;
|
|
assign dec_i0_predict_p_d.br_error = i0_br_error & i0_legal_decode_d & ~leak1_mode;
|
|
assign dec_i0_predict_p_d.br_start_error = dec_i0_brp.br_start_error & i0_legal_decode_d & ~leak1_mode;
|
|
assign i0_predict_index_d[pt.BTB_ADDR_HI:pt.BTB_ADDR_LO] = dec_i0_bp_index;
|
|
|
|
assign i0_predict_btag_d[pt.BTB_BTAG_SIZE-1:0] = dec_i0_bp_btag[pt.BTB_BTAG_SIZE-1:0];
|
|
assign i0_br_error_all = (i0_br_error | dec_i0_brp.br_start_error) & ~leak1_mode;
|
|
assign dec_i0_predict_p_d.toffset[11:0] = i0_br_offset[11:0];
|
|
assign i0_predict_fghr_d[pt.BHT_GHR_SIZE-1:0] = dec_i0_bp_fghr[pt.BHT_GHR_SIZE-1:0];
|
|
assign dec_i0_predict_p_d.way = dec_i0_brp.way;
|
|
|
|
|
|
if(pt.BTB_FULLYA) begin
|
|
logic btb_error_found, btb_error_found_f;
|
|
logic [$clog2(pt.BTB_SIZE)-1:0] fa_error_index_ns;
|
|
|
|
assign btb_error_found = (i0_br_error_all | btb_error_found_f) & ~dec_tlu_flush_lower_r;
|
|
assign fa_error_index_ns = (i0_br_error_all & ~btb_error_found_f) ? dec_i0_bp_fa_index : dec_fa_error_index;
|
|
|
|
rvdff #($clog2(pt.BTB_SIZE)+1) btberrorfa_f (.*, .clk(active_clk),
|
|
.din({btb_error_found, fa_error_index_ns}),
|
|
.dout({btb_error_found_f, dec_fa_error_index}));
|
|
|
|
|
|
end
|
|
else
|
|
assign dec_fa_error_index = 'b0;
|
|
|
|
|
|
// end
|
|
end // if (pt.BTB_ENABLE==1)
|
|
else begin
|
|
|
|
always_comb begin
|
|
dec_i0_predict_p_d = '0;
|
|
dec_i0_predict_p_d.pcall = i0_pcall; // don't mark as pcall if branch error
|
|
dec_i0_predict_p_d.pja = i0_pja;
|
|
dec_i0_predict_p_d.pret = i0_pret;
|
|
dec_i0_predict_p_d.pc4 = dec_i0_pc4_d;
|
|
end
|
|
|
|
assign i0_br_error_all = '0;
|
|
assign i0_predict_index_d = '0;
|
|
assign i0_predict_btag_d = '0;
|
|
assign i0_predict_fghr_d = '0;
|
|
assign i0_brp_valid = '0;
|
|
end // else: !if(pt.BTB_ENABLE==1)
|
|
|
|
// on br error turn anything into a nop
|
|
// on i0 instruction fetch access fault turn anything into a nop
|
|
// nop => alu rs1 imm12 rd lor
|
|
|
|
assign i0_icaf_d = dec_i0_icaf_d | dec_i0_dbecc_d;
|
|
|
|
assign i0_instr_error = i0_icaf_d;
|
|
|
|
always_comb begin
|
|
i0_dp = i0_dp_raw;
|
|
if (i0_br_error_all | i0_instr_error) begin
|
|
i0_dp = '0;
|
|
i0_dp.alu = 1'b1;
|
|
i0_dp.rs1 = 1'b1;
|
|
i0_dp.rs2 = 1'b1;
|
|
i0_dp.lor = 1'b1;
|
|
i0_dp.legal = 1'b1;
|
|
i0_dp.postsync = 1'b1;
|
|
end
|
|
end
|
|
|
|
assign i0[31:0] = dec_i0_instr_d[31:0];
|
|
|
|
assign dec_i0_select_pc_d = i0_dp.pc;
|
|
|
|
// branches that can be predicted
|
|
|
|
assign i0_predict_br = i0_dp.condbr | i0_pcall | i0_pja | i0_pret;
|
|
|
|
assign i0_predict_nt = ~(dec_i0_brp.hist[1] & i0_brp_valid) & i0_predict_br;
|
|
assign i0_predict_t = (dec_i0_brp.hist[1] & i0_brp_valid) & i0_predict_br;
|
|
|
|
assign i0_ap.add = i0_dp.add;
|
|
assign i0_ap.sub = i0_dp.sub;
|
|
assign i0_ap.land = i0_dp.land;
|
|
assign i0_ap.lor = i0_dp.lor;
|
|
assign i0_ap.lxor = i0_dp.lxor;
|
|
assign i0_ap.sll = i0_dp.sll;
|
|
assign i0_ap.srl = i0_dp.srl;
|
|
assign i0_ap.sra = i0_dp.sra;
|
|
assign i0_ap.slt = i0_dp.slt;
|
|
assign i0_ap.unsign = i0_dp.unsign;
|
|
assign i0_ap.beq = i0_dp.beq;
|
|
assign i0_ap.bne = i0_dp.bne;
|
|
assign i0_ap.blt = i0_dp.blt;
|
|
assign i0_ap.bge = i0_dp.bge;
|
|
|
|
assign i0_ap.clz = i0_dp.clz;
|
|
assign i0_ap.ctz = i0_dp.ctz;
|
|
assign i0_ap.cpop = i0_dp.cpop;
|
|
assign i0_ap.sext_b = i0_dp.sext_b;
|
|
assign i0_ap.sext_h = i0_dp.sext_h;
|
|
assign i0_ap.sh1add = i0_dp.sh1add;
|
|
assign i0_ap.sh2add = i0_dp.sh2add;
|
|
assign i0_ap.sh3add = i0_dp.sh3add;
|
|
assign i0_ap.zba = i0_dp.zba;
|
|
assign i0_ap.min = i0_dp.min;
|
|
assign i0_ap.max = i0_dp.max;
|
|
assign i0_ap.pack = i0_dp.pack;
|
|
assign i0_ap.packu = i0_dp.packu;
|
|
assign i0_ap.packh = i0_dp.packh;
|
|
assign i0_ap.rol = i0_dp.rol;
|
|
assign i0_ap.ror = i0_dp.ror;
|
|
assign i0_ap.grev = i0_dp.grev;
|
|
assign i0_ap.gorc = i0_dp.gorc;
|
|
assign i0_ap.zbb = i0_dp.zbb;
|
|
assign i0_ap.bset = i0_dp.bset;
|
|
assign i0_ap.bclr = i0_dp.bclr;
|
|
assign i0_ap.binv = i0_dp.binv;
|
|
assign i0_ap.bext = i0_dp.bext;
|
|
|
|
assign i0_ap.csr_write = i0_csr_write_only_d;
|
|
assign i0_ap.csr_imm = i0_dp.csr_imm;
|
|
assign i0_ap.jal = i0_jal;
|
|
|
|
assign i0_ap_pc2 = ~dec_i0_pc4_d;
|
|
assign i0_ap_pc4 = dec_i0_pc4_d;
|
|
|
|
assign i0_ap.predict_nt = i0_predict_nt;
|
|
assign i0_ap.predict_t = i0_predict_t;
|
|
|
|
|
|
// non block load cam logic
|
|
|
|
always_comb begin
|
|
found = 0;
|
|
for (int i=0; i<NBLOAD_SIZE; i++) begin
|
|
if (~found) begin
|
|
if (~cam[i].valid) begin
|
|
cam_wen[i] = cam_write;
|
|
found = 1'b1;
|
|
end
|
|
else begin
|
|
cam_wen[i] = 0;
|
|
end
|
|
end
|
|
else
|
|
cam_wen[i] = 0;
|
|
end
|
|
end
|
|
|
|
assign cam_write = lsu_nonblock_load_valid_m;
|
|
assign cam_write_tag[NBLOAD_TAG_MSB:0] = lsu_nonblock_load_tag_m[NBLOAD_TAG_MSB:0];
|
|
|
|
assign cam_inv_reset = lsu_nonblock_load_inv_r;
|
|
assign cam_inv_reset_tag[NBLOAD_TAG_MSB:0] = lsu_nonblock_load_inv_tag_r[NBLOAD_TAG_MSB:0];
|
|
|
|
assign cam_data_reset = lsu_nonblock_load_data_valid | lsu_nonblock_load_data_error;
|
|
assign cam_data_reset_tag[NBLOAD_TAG_MSB:0] = lsu_nonblock_load_data_tag[NBLOAD_TAG_MSB:0];
|
|
|
|
assign nonblock_load_rd[4:0] = (x_d.i0load) ? x_d.i0rd[4:0] : 5'b0; // rd data
|
|
|
|
|
|
// checks
|
|
|
|
`ifdef RV_ASSERT_ON
|
|
assert_dec_data_valid_data_error_onehot: assert #0 ($onehot0({lsu_nonblock_load_data_valid,lsu_nonblock_load_data_error}));
|
|
assert_dec_cam_inv_reset_onehot: assert #0 ($onehot0(cam_inv_reset_val[NBLOAD_SIZE_MSB:0]));
|
|
assert_dec_cam_data_reset_onehot: assert #0 ($onehot0(cam_data_reset_val[NBLOAD_SIZE_MSB:0]));
|
|
`endif
|
|
|
|
|
|
|
|
// case of multiple loads to same dest ie. x1 ... you have to invalidate the older one
|
|
|
|
for (genvar i=0; i<NBLOAD_SIZE; i++) begin : cam_array
|
|
|
|
assign cam_inv_reset_val[i] = cam_inv_reset & (cam_inv_reset_tag[NBLOAD_TAG_MSB:0] == cam[i].tag[NBLOAD_TAG_MSB:0]) & cam[i].valid;
|
|
|
|
assign cam_data_reset_val[i] = cam_data_reset & (cam_data_reset_tag[NBLOAD_TAG_MSB:0] == cam_raw[i].tag[NBLOAD_TAG_MSB:0]) & cam_raw[i].valid;
|
|
|
|
always_comb begin
|
|
|
|
cam[i] = cam_raw[i];
|
|
|
|
if (cam_data_reset_val[i])
|
|
cam[i].valid = 1'b0;
|
|
|
|
cam_in[i] = '0;
|
|
|
|
if (cam_wen[i]) begin
|
|
cam_in[i].valid = 1'b1;
|
|
cam_in[i].wb = 1'b0;
|
|
cam_in[i].tag[NBLOAD_TAG_MSB:0] = cam_write_tag[NBLOAD_TAG_MSB:0];
|
|
cam_in[i].rd[4:0] = nonblock_load_rd[4:0];
|
|
end
|
|
else if ( (cam_inv_reset_val[i]) |
|
|
(i0_wen_r & (r_d_in.i0rd[4:0] == cam[i].rd[4:0]) & cam[i].wb) )
|
|
cam_in[i].valid = 1'b0;
|
|
else
|
|
cam_in[i] = cam[i];
|
|
|
|
if (nonblock_load_valid_m_delay & (lsu_nonblock_load_inv_tag_r[NBLOAD_TAG_MSB:0]==cam[i].tag[NBLOAD_TAG_MSB:0]) & cam[i].valid)
|
|
cam_in[i].wb = 1'b1;
|
|
|
|
// force debug halt forces cam valids to 0; highest priority
|
|
if (dec_tlu_force_halt)
|
|
cam_in[i].valid = 1'b0;
|
|
end
|
|
|
|
|
|
rvdffie #( $bits(el2_load_cam_pkt_t) ) cam_ff (.*, .din(cam_in[i]), .dout(cam_raw[i]));
|
|
|
|
|
|
assign nonblock_load_write[i] = (load_data_tag[NBLOAD_TAG_MSB:0] == cam_raw[i].tag[NBLOAD_TAG_MSB:0]) & cam_raw[i].valid;
|
|
|
|
|
|
end : cam_array
|
|
|
|
|
|
|
|
assign load_data_tag[NBLOAD_TAG_MSB:0] = lsu_nonblock_load_data_tag[NBLOAD_TAG_MSB:0];
|
|
|
|
`ifdef RV_ASSERT_ON
|
|
assert_dec_cam_nonblock_load_write_onehot: assert #0 ($onehot0(nonblock_load_write[NBLOAD_SIZE_MSB:0]));
|
|
`endif
|
|
|
|
|
|
assign nonblock_load_cancel = ((r_d_in.i0rd[4:0] == dec_nonblock_load_waddr[4:0]) & i0_wen_r); // cancel if any younger inst (including another nonblock) committing this cycle
|
|
|
|
|
|
assign dec_nonblock_load_wen = lsu_nonblock_load_data_valid & |nonblock_load_write[NBLOAD_SIZE_MSB:0] & ~nonblock_load_cancel;
|
|
|
|
always_comb begin
|
|
|
|
dec_nonblock_load_waddr[4:0] = '0;
|
|
i0_nonblock_load_stall = i0_nonblock_boundary_stall;
|
|
|
|
for (int i=0; i<NBLOAD_SIZE; i++) begin
|
|
dec_nonblock_load_waddr[4:0] |= ({5{nonblock_load_write[i]}} & cam[i].rd[4:0]);
|
|
i0_nonblock_load_stall |= dec_i0_rs1_en_d & cam[i].valid & (cam[i].rd[4:0] == i0r.rs1[4:0]);
|
|
i0_nonblock_load_stall |= dec_i0_rs2_en_d & cam[i].valid & (cam[i].rd[4:0] == i0r.rs2[4:0]);
|
|
end
|
|
|
|
end
|
|
|
|
assign i0_nonblock_boundary_stall = ((nonblock_load_rd[4:0]==i0r.rs1[4:0]) & lsu_nonblock_load_valid_m & dec_i0_rs1_en_d) |
|
|
((nonblock_load_rd[4:0]==i0r.rs2[4:0]) & lsu_nonblock_load_valid_m & dec_i0_rs2_en_d);
|
|
|
|
|
|
|
|
// don't writeback a nonblock load
|
|
|
|
rvdffs #(1) wbnbloaddelayff (.*, .clk(active_clk), .en(i0_r_ctl_en ), .din(lsu_nonblock_load_valid_m), .dout(nonblock_load_valid_m_delay) );
|
|
|
|
assign i0_load_kill_wen_r = nonblock_load_valid_m_delay & r_d.i0load;
|
|
|
|
|
|
|
|
// end non block load cam logic
|
|
|
|
// pmu start
|
|
|
|
|
|
|
|
|
|
assign csr_read = csr_ren_qual_d;
|
|
assign csr_write = dec_csr_wen_unq_d;
|
|
|
|
assign i0_br_unpred = i0_dp.jal & ~i0_predict_br;
|
|
|
|
// the classes must be mutually exclusive with one another
|
|
|
|
always_comb begin
|
|
i0_itype = NULL;
|
|
|
|
if (i0_legal_decode_d) begin
|
|
if (i0_dp.mul) i0_itype = MUL;
|
|
if (i0_dp.load) i0_itype = LOAD;
|
|
if (i0_dp.store) i0_itype = STORE;
|
|
if (i0_dp.pm_alu) i0_itype = ALU;
|
|
if (i0_dp.zbb | i0_dp.zbs |
|
|
i0_dp.zbe | i0_dp.zbc |
|
|
i0_dp.zbp | i0_dp.zbr |
|
|
i0_dp.zbf | i0_dp.zba)
|
|
i0_itype = BITMANIPU;
|
|
if ( csr_read & ~csr_write) i0_itype = CSRREAD;
|
|
if (~csr_read & csr_write) i0_itype = CSRWRITE;
|
|
if ( csr_read & csr_write) i0_itype = CSRRW;
|
|
if (i0_dp.ebreak) i0_itype = EBREAK;
|
|
if (i0_dp.ecall) i0_itype = ECALL;
|
|
if (i0_dp.fence) i0_itype = FENCE;
|
|
if (i0_dp.fence_i) i0_itype = FENCEI; // fencei will set this even with fence attribute
|
|
if (i0_dp.mret) i0_itype = MRET;
|
|
if (i0_dp.condbr) i0_itype = CONDBR;
|
|
if (i0_dp.jal) i0_itype = JAL;
|
|
end
|
|
end
|
|
|
|
|
|
|
|
|
|
|
|
// end pmu
|
|
|
|
|
|
el2_dec_dec_ctl i0_dec (.inst(i0[31:0]),.out(i0_dp_raw));
|
|
|
|
|
|
|
|
|
|
rvdff #(1) lsu_idle_ff (.*, .clk(active_clk), .din(lsu_idle_any), .dout(lsu_idle));
|
|
|
|
|
|
|
|
assign leak1_i1_stall_in = (dec_tlu_flush_leak_one_r | (leak1_i1_stall & ~dec_tlu_flush_lower_r));
|
|
|
|
|
|
assign leak1_mode = leak1_i1_stall;
|
|
|
|
assign leak1_i0_stall_in = ((dec_i0_decode_d & leak1_i1_stall) | (leak1_i0_stall & ~dec_tlu_flush_lower_r));
|
|
|
|
|
|
|
|
|
|
// 12b jal's can be predicted - these are calls
|
|
|
|
assign i0_pcall_imm[20:1] = {i0[31],i0[19:12],i0[20],i0[30:21]};
|
|
|
|
assign i0_pcall_12b_offset = (i0_pcall_imm[12]) ? (i0_pcall_imm[20:13] == 8'hff) : (i0_pcall_imm[20:13] == 8'h0);
|
|
|
|
assign i0_pcall_case = i0_pcall_12b_offset & i0_dp_raw.imm20 & (i0r.rd[4:0] == 5'd1 | i0r.rd[4:0] == 5'd5);
|
|
assign i0_pja_case = i0_pcall_12b_offset & i0_dp_raw.imm20 & ~(i0r.rd[4:0] == 5'd1 | i0r.rd[4:0] == 5'd5);
|
|
|
|
assign i0_pcall_raw = i0_dp_raw.jal & i0_pcall_case; // this includes ja
|
|
assign i0_pcall = i0_dp.jal & i0_pcall_case;
|
|
|
|
assign i0_pja_raw = i0_dp_raw.jal & i0_pja_case;
|
|
assign i0_pja = i0_dp.jal & i0_pja_case;
|
|
|
|
|
|
assign i0_br_offset[11:0] = (i0_pcall_raw | i0_pja_raw) ? i0_pcall_imm[12:1] : {i0[31],i0[7],i0[30:25],i0[11:8]};
|
|
|
|
assign i0_pret_case = (i0_dp_raw.jal & i0_dp_raw.imm12 & (i0r.rd[4:0] == 5'b0) & (i0r.rs1[4:0] == 5'd1 | i0r.rs1[4:0] == 5'd5)); // jalr with rd==0, rs1==1 or rs1==5 is a ret
|
|
|
|
assign i0_pret_raw = i0_dp_raw.jal & i0_pret_case;
|
|
assign i0_pret = i0_dp.jal & i0_pret_case;
|
|
|
|
assign i0_jal = i0_dp.jal & ~i0_pcall_case & ~i0_pja_case & ~i0_pret_case;
|
|
|
|
// lsu stuff
|
|
// load/store mutually exclusive
|
|
assign dec_lsu_offset_d[11:0] = ({12{ ~dec_extint_stall & i0_dp.lsu & i0_dp.load}} & i0[31:20]) |
|
|
({12{ ~dec_extint_stall & i0_dp.lsu & i0_dp.store}} & {i0[31:25],i0[11:7]});
|
|
|
|
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|
|
assign div_p.valid = div_decode_d;
|
|
|
|
assign div_p.unsign = i0_dp.unsign;
|
|
assign div_p.rem = i0_dp.rem;
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|
|
|
|
assign mul_p.valid = mul_decode_d;
|
|
|
|
assign mul_p.rs1_sign = i0_dp.rs1_sign;
|
|
assign mul_p.rs2_sign = i0_dp.rs2_sign;
|
|
assign mul_p.low = i0_dp.low;
|
|
assign mul_p.bcompress = i0_dp.bcompress;
|
|
assign mul_p.bdecompress = i0_dp.bdecompress;
|
|
assign mul_p.clmul = i0_dp.clmul;
|
|
assign mul_p.clmulh = i0_dp.clmulh;
|
|
assign mul_p.clmulr = i0_dp.clmulr;
|
|
assign mul_p.grev = i0_dp.grev;
|
|
assign mul_p.gorc = i0_dp.gorc;
|
|
assign mul_p.shfl = i0_dp.shfl;
|
|
assign mul_p.unshfl = i0_dp.unshfl;
|
|
assign mul_p.xperm_n = i0_dp.xperm_n;
|
|
assign mul_p.xperm_b = i0_dp.xperm_b;
|
|
assign mul_p.xperm_h = i0_dp.xperm_h;
|
|
assign mul_p.crc32_b = i0_dp.crc32_b;
|
|
assign mul_p.crc32_h = i0_dp.crc32_h;
|
|
assign mul_p.crc32_w = i0_dp.crc32_w;
|
|
assign mul_p.crc32c_b = i0_dp.crc32c_b;
|
|
assign mul_p.crc32c_h = i0_dp.crc32c_h;
|
|
assign mul_p.crc32c_w = i0_dp.crc32c_w;
|
|
assign mul_p.bfp = i0_dp.bfp;
|
|
|
|
|
|
always_comb begin
|
|
lsu_p = '0;
|
|
|
|
if (dec_extint_stall) begin
|
|
lsu_p.load = 1'b1;
|
|
lsu_p.word = 1'b1;
|
|
lsu_p.fast_int = 1'b1;
|
|
lsu_p.valid = 1'b1;
|
|
end
|
|
else begin
|
|
lsu_p.valid = lsu_decode_d;
|
|
|
|
lsu_p.load = i0_dp.load ;
|
|
lsu_p.store = i0_dp.store;
|
|
lsu_p.by = i0_dp.by ;
|
|
lsu_p.half = i0_dp.half ;
|
|
lsu_p.word = i0_dp.word ;
|
|
lsu_p.stack = (i0r.rs1[4:0]==5'd2); // stack reference
|
|
|
|
lsu_p.load_ldst_bypass_d = load_ldst_bypass_d ;
|
|
lsu_p.store_data_bypass_d = store_data_bypass_d;
|
|
lsu_p.store_data_bypass_m = store_data_bypass_m;
|
|
|
|
lsu_p.unsign = i0_dp.unsign;
|
|
end
|
|
end
|
|
|
|
|
|
assign dec_lsu_valid_raw_d = (i0_valid_d & (i0_dp_raw.load | i0_dp_raw.store) & ~dma_dccm_stall_any & ~i0_block_raw_d) | dec_extint_stall;
|
|
|
|
|
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|
|
assign i0r.rs1[4:0] = i0[19:15];
|
|
assign i0r.rs2[4:0] = i0[24:20];
|
|
assign i0r.rd[4:0] = i0[11:7];
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|
|
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|
|
assign dec_i0_rs1_en_d = i0_dp.rs1 & (i0r.rs1[4:0] != 5'd0); // if rs1_en=0 then read will be all 0's
|
|
assign dec_i0_rs2_en_d = i0_dp.rs2 & (i0r.rs2[4:0] != 5'd0);
|
|
assign i0_rd_en_d = i0_dp.rd & (i0r.rd[4:0] != 5'd0);
|
|
|
|
assign dec_i0_rs1_d[4:0] = i0r.rs1[4:0];
|
|
assign dec_i0_rs2_d[4:0] = i0r.rs2[4:0];
|
|
|
|
|
|
assign i0_jalimm20 = i0_dp.jal & i0_dp.imm20; // jal
|
|
assign i0_uiimm20 = ~i0_dp.jal & i0_dp.imm20;
|
|
|
|
|
|
// csr logic
|
|
|
|
assign dec_csr_ren_d = i0_dp.csr_read & i0_valid_d;
|
|
assign csr_ren_qual_d = i0_dp.csr_read & i0_legal_decode_d;
|
|
|
|
assign csr_clr_d = i0_dp.csr_clr & i0_legal_decode_d;
|
|
assign csr_set_d = i0_dp.csr_set & i0_legal_decode_d;
|
|
assign csr_write_d = i0_csr_write & i0_legal_decode_d;
|
|
|
|
assign i0_csr_write_only_d = i0_csr_write & ~i0_dp.csr_read;
|
|
|
|
assign dec_csr_wen_unq_d = (i0_dp.csr_clr | i0_dp.csr_set | i0_csr_write) & i0_valid_d; // for csr legal, can't write read-only csr
|
|
|
|
assign dec_csr_any_unq_d = any_csr_d & i0_valid_d;
|
|
|
|
|
|
assign dec_csr_rdaddr_d[11:0] = {12{dec_csr_any_unq_d}} & i0[31:20];
|
|
assign dec_csr_wraddr_r[11:0] = {12{r_d.csrwen & r_d.i0valid}} & r_d.csrwaddr[11:0];
|
|
|
|
|
|
// make sure csr doesn't write same cycle as dec_tlu_flush_lower_wb
|
|
// also use valid so it's flushable
|
|
assign dec_csr_wen_r = r_d.csrwen & r_d.i0valid & ~dec_tlu_i0_kill_writeb_r;
|
|
|
|
// If we are writing MIE or MSTATUS, hold off the external interrupt for a cycle on the write.
|
|
assign dec_csr_stall_int_ff = ((r_d.csrwaddr[11:0] == 12'h300) | (r_d.csrwaddr[11:0] == 12'h304)) & r_d.csrwen & r_d.i0valid & ~dec_tlu_i0_kill_writeb_wb;
|
|
|
|
|
|
rvdff #(5) csrmiscff (.*,
|
|
.clk (active_clk),
|
|
.din ({csr_ren_qual_d, csr_clr_d, csr_set_d, csr_write_d, i0_dp.csr_imm}),
|
|
.dout({csr_read_x, csr_clr_x, csr_set_x, csr_write_x, csr_imm_x})
|
|
);
|
|
|
|
|
|
|
|
|
|
// perform the update operation if any
|
|
|
|
rvdffe #(37) csr_rddata_x_ff (.*, .en(i0_x_data_en & any_csr_d), .din( {i0[19:15],dec_csr_rddata_d[31:0]}), .dout({csrimm_x[4:0],csr_rddata_x[31:0]}));
|
|
|
|
|
|
assign csr_mask_x[31:0] = ({32{ csr_imm_x}} & {27'b0,csrimm_x[4:0]}) |
|
|
({32{~csr_imm_x}} & exu_csr_rs1_x[31:0] );
|
|
|
|
|
|
assign write_csr_data_x[31:0] = ({32{csr_clr_x}} & (csr_rddata_x[31:0] & ~csr_mask_x[31:0])) |
|
|
({32{csr_set_x}} & (csr_rddata_x[31:0] | csr_mask_x[31:0])) |
|
|
({32{csr_write_x}} & ( csr_mask_x[31:0]));
|
|
|
|
|
|
// pause instruction
|
|
|
|
|
|
|
|
|
|
assign clear_pause = (dec_tlu_flush_lower_r & ~dec_tlu_flush_pause_r) |
|
|
(pause_state & (write_csr_data[31:1] == 31'b0)); // if 0 or 1 then exit pause state - 1 cycle pause
|
|
|
|
assign pause_state_in = (dec_tlu_wr_pause_r | pause_state) & ~clear_pause;
|
|
|
|
|
|
|
|
assign dec_pause_state = pause_state;
|
|
|
|
|
|
|
|
assign dec_pause_state_cg = pause_state & ~tlu_wr_pause_r1 & ~tlu_wr_pause_r2;
|
|
|
|
// end pause
|
|
|
|
|
|
assign csr_data_wen = ((csr_clr_x | csr_set_x | csr_write_x) & csr_read_x) | dec_tlu_wr_pause_r | pause_state;
|
|
|
|
assign write_csr_data_in[31:0] = (pause_state) ? (write_csr_data[31:0] - 32'b1) :
|
|
(dec_tlu_wr_pause_r) ? dec_csr_wrdata_r[31:0] : write_csr_data_x[31:0];
|
|
|
|
// will hold until write-back at which time the CSR will be updated while GPR is possibly written with prior CSR
|
|
rvdffe #(32) write_csr_ff (.*, .clk(free_l2clk), .en(csr_data_wen), .din(write_csr_data_in[31:0]), .dout(write_csr_data[31:0]));
|
|
|
|
assign pause_stall = pause_state;
|
|
|
|
// for csr write only data is produced by the alu
|
|
assign dec_csr_wrdata_r[31:0] = (r_d.csrwonly & r_d.i0valid) ? i0_result_corr_r[31:0] : write_csr_data[31:0];
|
|
|
|
|
|
|
|
assign dec_i0_immed_d[31:0] = i0_immed_d[31:0];
|
|
|
|
assign i0_immed_d[31:0] = ({32{i0_dp.imm12}} & { {20{i0[31]}},i0[31:20] }) | // jalr
|
|
({32{i0_dp.shimm5}} & { 27'b0, i0[24:20] }) |
|
|
({32{i0_jalimm20}} & { {12{i0[31]}},i0[19:12],i0[20],i0[30:21],1'b0}) |
|
|
({32{i0_uiimm20}} & { i0[31:12],12'b0 }) |
|
|
({32{i0_csr_write_only_d & i0_dp.csr_imm}} & { 27'b0, i0[19:15]}); // for csr's that only write csr, dont read csr
|
|
|
|
|
|
// all conditional branches are currently predict_nt
|
|
// change this to generate the sequential address for all other cases for NPC requirements at commit
|
|
assign dec_i0_br_immed_d[12:1] = (i0_ap.predict_nt & ~i0_dp.jal) ? i0_br_offset[11:0] : {10'b0,i0_ap_pc4,i0_ap_pc2};
|
|
|
|
|
|
assign last_br_immed_d[12:1] = ((i0_ap.predict_nt) ? {10'b0,i0_ap_pc4,i0_ap_pc2} : i0_br_offset[11:0] );
|
|
|
|
assign i0_valid_d = dec_ib0_valid_d;
|
|
|
|
// load_stall includes bus_barrier
|
|
|
|
assign i0_load_stall_d = (i0_dp.load ) & (lsu_load_stall_any | dma_dccm_stall_any);
|
|
|
|
assign i0_store_stall_d = i0_dp.store & (lsu_store_stall_any | dma_dccm_stall_any);
|
|
|
|
|
|
|
|
// some CSR reads need to be presync'd
|
|
assign i0_presync = i0_dp.presync | dec_tlu_presync_d | debug_fence_i | debug_fence_raw | dec_tlu_pipelining_disable; // both fence's presync
|
|
|
|
// some CSR writes need to be postsync'd
|
|
assign i0_postsync = i0_dp.postsync | dec_tlu_postsync_d | debug_fence_i | // only fence_i postsync
|
|
(i0_csr_write_only_d & (i0[31:20] == 12'h7c2)); // wr_pause must postsync
|
|
|
|
|
|
// debug fence csr
|
|
assign debug_fence_i = dec_debug_fence_d & dbg_cmd_wrdata[0];
|
|
assign debug_fence_raw = dec_debug_fence_d & dbg_cmd_wrdata[1];
|
|
|
|
assign debug_fence = debug_fence_raw | debug_fence_i; // fence_i causes a fence
|
|
|
|
assign i0_csr_write = i0_dp.csr_write & ~dec_debug_fence_d;
|
|
// end debug
|
|
|
|
|
|
// lets make ebreak, ecall, mret postsync, so break sync into pre and post
|
|
|
|
assign presync_stall = (i0_presync & prior_inflight_eff);
|
|
|
|
assign prior_inflight_eff = (i0_dp.div) ? prior_inflight_x : prior_inflight;
|
|
|
|
assign i0_div_prior_div_stall = i0_dp.div & div_active;
|
|
|
|
// Raw block has everything excepts the stalls coming from the lsu
|
|
assign i0_block_raw_d = (i0_dp.csr_read & prior_csr_write) |
|
|
dec_extint_stall |
|
|
pause_stall |
|
|
leak1_i0_stall |
|
|
dec_tlu_debug_stall |
|
|
postsync_stall |
|
|
presync_stall |
|
|
((i0_dp.fence | debug_fence) & ~lsu_idle) |
|
|
i0_nonblock_load_stall |
|
|
i0_load_block_d |
|
|
i0_nonblock_div_stall |
|
|
i0_div_prior_div_stall;
|
|
|
|
assign i0_block_d = i0_block_raw_d | i0_store_stall_d | i0_load_stall_d;
|
|
assign i0_exublock_d = i0_block_raw_d;
|
|
|
|
|
|
// block reads if there is a prior csr write in the pipeline
|
|
assign prior_csr_write = x_d.csrwonly |
|
|
r_d.csrwonly |
|
|
wbd.csrwonly;
|
|
|
|
|
|
|
|
if (pt.BITMANIP_ZBB == 1)
|
|
assign bitmanip_zbb_legal = 1'b1;
|
|
else
|
|
assign bitmanip_zbb_legal = ~(i0_dp.zbb & ~i0_dp.zbp);
|
|
|
|
if (pt.BITMANIP_ZBS == 1)
|
|
assign bitmanip_zbs_legal = 1'b1;
|
|
else
|
|
assign bitmanip_zbs_legal = ~i0_dp.zbs;
|
|
|
|
if (pt.BITMANIP_ZBE == 1)
|
|
assign bitmanip_zbe_legal = 1'b1;
|
|
else
|
|
assign bitmanip_zbe_legal = ~(i0_dp.zbe & ~i0_dp.zbp & ~i0_dp.zbf);
|
|
|
|
if (pt.BITMANIP_ZBC == 1)
|
|
assign bitmanip_zbc_legal = 1'b1;
|
|
else
|
|
assign bitmanip_zbc_legal = ~i0_dp.zbc;
|
|
|
|
if (pt.BITMANIP_ZBP == 1)
|
|
assign bitmanip_zbp_legal = 1'b1;
|
|
else
|
|
assign bitmanip_zbp_legal = ~(i0_dp.zbp & ~i0_dp.zbb & ~i0_dp.zbe & ~i0_dp.zbf);
|
|
|
|
if (pt.BITMANIP_ZBR == 1)
|
|
assign bitmanip_zbr_legal = 1'b1;
|
|
else
|
|
assign bitmanip_zbr_legal = ~i0_dp.zbr;
|
|
|
|
if (pt.BITMANIP_ZBF == 1)
|
|
assign bitmanip_zbf_legal = 1'b1;
|
|
else
|
|
assign bitmanip_zbf_legal = ~(i0_dp.zbf & ~i0_dp.zbp & ~i0_dp.zbe);
|
|
|
|
if (pt.BITMANIP_ZBA == 1)
|
|
assign bitmanip_zba_legal = 1'b1;
|
|
else
|
|
assign bitmanip_zba_legal = ~i0_dp.zba;
|
|
|
|
if ( (pt.BITMANIP_ZBB == 1) | (pt.BITMANIP_ZBP == 1) )
|
|
assign bitmanip_zbb_zbp_legal = 1'b1;
|
|
else
|
|
assign bitmanip_zbb_zbp_legal = ~(i0_dp.zbb & i0_dp.zbp & ~i0_dp.zbf); // added ~ZBF to exclude ZEXT.H
|
|
|
|
if ( (pt.BITMANIP_ZBP == 1) | (pt.BITMANIP_ZBE == 1) | (pt.BITMANIP_ZBF == 1))
|
|
assign bitmanip_zbp_zbe_zbf_legal = 1'b1;
|
|
else
|
|
assign bitmanip_zbp_zbe_zbf_legal = ~(i0_dp.zbp & i0_dp.zbe & i0_dp.zbf & ~i0_dp.zbb); // added ~ZBB to exclude ZEXT.H
|
|
|
|
if ( (pt.BITMANIP_ZBB == 1) | (pt.BITMANIP_ZBP == 1) | (pt.BITMANIP_ZBE == 1) | (pt.BITMANIP_ZBF == 1))
|
|
assign bitmanip_zbb_zbp_zbe_zbf_legal = 1'b1;
|
|
else
|
|
assign bitmanip_zbb_zbp_zbe_zbf_legal = ~(i0_dp.zbp & i0_dp.zbe & i0_dp.zbf & i0_dp.zbb); // added only for ZEXT.H
|
|
|
|
|
|
assign any_csr_d = i0_dp.csr_read | i0_csr_write;
|
|
assign bitmanip_legal = bitmanip_zbb_legal & bitmanip_zbs_legal & bitmanip_zbe_legal & bitmanip_zbc_legal & bitmanip_zbp_legal & bitmanip_zbr_legal & bitmanip_zbf_legal & bitmanip_zba_legal & bitmanip_zbb_zbp_legal & bitmanip_zbp_zbe_zbf_legal & bitmanip_zbb_zbp_zbe_zbf_legal;
|
|
|
|
assign i0_legal = i0_dp.legal & (~any_csr_d | dec_csr_legal_d) & bitmanip_legal;
|
|
|
|
|
|
|
|
// illegal inst handling
|
|
|
|
|
|
assign shift_illegal = dec_i0_decode_d & ~i0_legal;
|
|
|
|
assign illegal_inst_en = shift_illegal & ~illegal_lockout;
|
|
|
|
rvdffe #(32) illegal_any_ff (.*, .en(illegal_inst_en), .din(i0_inst_d[31:0]), .dout(dec_illegal_inst[31:0]));
|
|
|
|
assign illegal_lockout_in = (shift_illegal | illegal_lockout) & ~flush_final_r;
|
|
|
|
|
|
|
|
// allow illegals to flow down the pipe
|
|
assign dec_i0_decode_d = i0_valid_d & ~i0_block_d & ~dec_tlu_flush_lower_r & ~flush_final_r;
|
|
assign i0_exudecode_d = i0_valid_d & ~i0_exublock_d & ~dec_tlu_flush_lower_r & ~flush_final_r;
|
|
|
|
// define i0 legal decode
|
|
assign i0_legal_decode_d = dec_i0_decode_d & i0_legal;
|
|
assign i0_exulegal_decode_d = i0_exudecode_d & i0_legal;
|
|
|
|
|
|
// performance monitor signals
|
|
assign dec_pmu_instr_decoded = dec_i0_decode_d;
|
|
|
|
assign dec_pmu_decode_stall = i0_valid_d & ~dec_i0_decode_d;
|
|
|
|
assign dec_pmu_postsync_stall = postsync_stall & i0_valid_d;
|
|
assign dec_pmu_presync_stall = presync_stall & i0_valid_d;
|
|
|
|
|
|
|
|
// illegals will postsync
|
|
assign ps_stall_in = ( dec_i0_decode_d & (i0_postsync | ~i0_legal) ) |
|
|
( ps_stall & prior_inflight_x );
|
|
|
|
|
|
|
|
assign postsync_stall = ps_stall;
|
|
|
|
|
|
assign prior_inflight_x = x_d.i0valid;
|
|
assign prior_inflight_wb = r_d.i0valid;
|
|
|
|
assign prior_inflight = prior_inflight_x | prior_inflight_wb;
|
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|
assign dec_i0_alu_decode_d = i0_exulegal_decode_d & i0_dp.alu;
|
|
assign dec_i0_branch_d = i0_dp.condbr | i0_dp.jal | i0_br_error_all;
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|
assign lsu_decode_d = i0_legal_decode_d & i0_dp.lsu;
|
|
assign mul_decode_d = i0_exulegal_decode_d & i0_dp.mul;
|
|
assign div_decode_d = i0_exulegal_decode_d & i0_dp.div;
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|
assign dec_qual_lsu_d = i0_dp.lsu;
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// scheduling logic for alu
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assign i0_rs1_depend_i0_x = dec_i0_rs1_en_d & x_d.i0v & (x_d.i0rd[4:0] == i0r.rs1[4:0]);
|
|
assign i0_rs1_depend_i0_r = dec_i0_rs1_en_d & r_d.i0v & (r_d.i0rd[4:0] == i0r.rs1[4:0]);
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assign i0_rs2_depend_i0_x = dec_i0_rs2_en_d & x_d.i0v & (x_d.i0rd[4:0] == i0r.rs2[4:0]);
|
|
assign i0_rs2_depend_i0_r = dec_i0_rs2_en_d & r_d.i0v & (r_d.i0rd[4:0] == i0r.rs2[4:0]);
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// order the producers as follows: , i0_x, i0_r, i0_wb
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assign {i0_rs1_class_d, i0_rs1_depth_d[1:0]} = (i0_rs1_depend_i0_x ) ? { i0_x_c, 2'd1 } :
|
|
(i0_rs1_depend_i0_r ) ? { i0_r_c, 2'd2 } : '0;
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|
assign {i0_rs2_class_d, i0_rs2_depth_d[1:0]} = (i0_rs2_depend_i0_x ) ? { i0_x_c, 2'd1 } :
|
|
(i0_rs2_depend_i0_r ) ? { i0_r_c, 2'd2 } : '0;
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// stores will bypass load data in the lsu pipe
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if (pt.LOAD_TO_USE_PLUS1 == 1) begin : genblock
|
|
assign i0_load_block_d = (i0_rs1_class_d.load & i0_rs1_depth_d[0]) |
|
|
(i0_rs2_class_d.load & i0_rs2_depth_d[0] & ~i0_dp.store);
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|
assign load_ldst_bypass_d = (i0_dp.load | i0_dp.store) & i0_rs1_depth_d[1] & i0_rs1_class_d.load;
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assign store_data_bypass_d = i0_dp.store & i0_rs2_depth_d[1] & i0_rs2_class_d.load;
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assign store_data_bypass_m = i0_dp.store & i0_rs2_depth_d[0] & i0_rs2_class_d.load;
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|
end
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else begin : genblock
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assign i0_load_block_d = 1'b0;
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assign load_ldst_bypass_d = (i0_dp.load | i0_dp.store) & i0_rs1_depth_d[0] & i0_rs1_class_d.load;
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assign store_data_bypass_d = i0_dp.store & i0_rs2_depth_d[0] & i0_rs2_class_d.load;
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|
assign store_data_bypass_m = 1'b0;
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|
end
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assign dec_tlu_i0_valid_r = r_d.i0valid & ~dec_tlu_flush_lower_wb;
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assign d_t.legal = i0_legal_decode_d;
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|
assign d_t.icaf = i0_icaf_d & i0_legal_decode_d; // dbecc is icaf exception
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assign d_t.icaf_second = dec_i0_icaf_second_d & i0_legal_decode_d; // this includes icaf and dbecc
|
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assign d_t.icaf_type[1:0] = dec_i0_icaf_type_d[1:0];
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assign d_t.fence_i = (i0_dp.fence_i | debug_fence_i) & i0_legal_decode_d;
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// put pmu info into the trap packet
|
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assign d_t.pmu_i0_itype = i0_itype;
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|
assign d_t.pmu_i0_br_unpred = i0_br_unpred;
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assign d_t.pmu_divide = 1'b0;
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assign d_t.pmu_lsu_misaligned = 1'b0;
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assign d_t.i0trigger[3:0] = dec_i0_trigger_match_d[3:0] & {4{dec_i0_decode_d}};
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rvdfflie #( .WIDTH($bits(el2_trap_pkt_t)),.LEFT(9) ) trap_xff (.*, .en(i0_x_ctl_en), .din(d_t), .dout(x_t));
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always_comb begin
|
|
x_t_in = x_t;
|
|
x_t_in.i0trigger[3:0] = x_t.i0trigger & ~{4{dec_tlu_flush_lower_wb}};
|
|
end
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rvdfflie #( .WIDTH($bits(el2_trap_pkt_t)),.LEFT(9) ) trap_r_ff (.*, .en(i0_x_ctl_en), .din(x_t_in), .dout(r_t));
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always_comb begin
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|
|
r_t_in = r_t;
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|
r_t_in.i0trigger[3:0] = ({4{(r_d.i0load | r_d.i0store)}} & lsu_trigger_match_r[3:0]) | r_t.i0trigger[3:0];
|
|
r_t_in.pmu_lsu_misaligned = lsu_pmu_misaligned_r; // only valid if a load/store is valid in DC3 stage
|
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|
if (dec_tlu_flush_lower_wb) r_t_in = '0 ;
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|
|
end
|
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|
|
always_comb begin
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|
|
|
dec_tlu_packet_r = r_t_in;
|
|
dec_tlu_packet_r.pmu_divide = r_d.i0div & r_d.i0valid;
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|
|
|
end
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|
|
// end tlu stuff
|
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|
|
assign i0_d_c.mul = i0_dp.mul & i0_legal_decode_d;
|
|
assign i0_d_c.load = i0_dp.load & i0_legal_decode_d;
|
|
assign i0_d_c.alu = i0_dp.alu & i0_legal_decode_d;
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|
|
|
rvdffs #( $bits(el2_class_pkt_t) ) i0_x_c_ff (.*, .en(i0_x_ctl_en), .clk(active_clk), .din(i0_d_c), .dout(i0_x_c));
|
|
rvdffs #( $bits(el2_class_pkt_t) ) i0_r_c_ff (.*, .en(i0_r_ctl_en), .clk(active_clk), .din(i0_x_c), .dout(i0_r_c));
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assign d_d.i0rd[4:0] = i0r.rd[4:0];
|
|
assign d_d.i0v = i0_rd_en_d & i0_legal_decode_d;
|
|
assign d_d.i0valid = dec_i0_decode_d; // has flush_final_r
|
|
|
|
assign d_d.i0load = i0_dp.load & i0_legal_decode_d;
|
|
assign d_d.i0store = i0_dp.store & i0_legal_decode_d;
|
|
assign d_d.i0div = i0_dp.div & i0_legal_decode_d;
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|
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|
|
assign d_d.csrwen = dec_csr_wen_unq_d & i0_legal_decode_d;
|
|
assign d_d.csrwonly = i0_csr_write_only_d & dec_i0_decode_d;
|
|
assign d_d.csrwaddr[11:0] = (d_d.csrwen) ? i0[31:20] : '0; // csr write address for rd==0 case
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|
|
rvdff #(3) i0cgff (.*, .clk(active_clk), .din(i0_pipe_en[3:1]), .dout(i0_pipe_en[2:0]));
|
|
|
|
assign i0_pipe_en[3] = dec_i0_decode_d;
|
|
|
|
assign i0_x_ctl_en = (|i0_pipe_en[3:2] | clk_override);
|
|
assign i0_r_ctl_en = (|i0_pipe_en[2:1] | clk_override);
|
|
assign i0_wb_ctl_en = (|i0_pipe_en[1:0] | clk_override);
|
|
assign i0_x_data_en = ( i0_pipe_en[3] | clk_override);
|
|
assign i0_r_data_en = ( i0_pipe_en[2] | clk_override);
|
|
assign i0_wb_data_en = ( i0_pipe_en[1] | clk_override);
|
|
|
|
assign dec_data_en[1:0] = {i0_x_data_en, i0_r_data_en};
|
|
assign dec_ctl_en[1:0] = {i0_x_ctl_en, i0_r_ctl_en};
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|
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|
|
rvdfflie #( .WIDTH($bits(el2_dest_pkt_t)),.LEFT(15) ) e1ff (.*, .en(i0_x_ctl_en), .din(d_d), .dout(x_d));
|
|
|
|
always_comb begin
|
|
x_d_in = x_d;
|
|
|
|
x_d_in.i0v = x_d.i0v & ~dec_tlu_flush_lower_wb & ~dec_tlu_flush_lower_r;
|
|
x_d_in.i0valid = x_d.i0valid & ~dec_tlu_flush_lower_wb & ~dec_tlu_flush_lower_r;
|
|
end
|
|
|
|
rvdfflie #( .WIDTH($bits(el2_dest_pkt_t)), .LEFT(15) ) r_d_ff (.*, .en(i0_r_ctl_en), .din(x_d_in), .dout(r_d));
|
|
|
|
|
|
always_comb begin
|
|
|
|
r_d_in = r_d;
|
|
|
|
|
|
// for the bench
|
|
r_d_in.i0rd[4:0] = r_d.i0rd[4:0];
|
|
|
|
r_d_in.i0v = (r_d.i0v & ~dec_tlu_flush_lower_wb);
|
|
r_d_in.i0valid = (r_d.i0valid & ~dec_tlu_flush_lower_wb);
|
|
|
|
r_d_in.i0load = r_d.i0load & ~dec_tlu_flush_lower_wb;
|
|
r_d_in.i0store = r_d.i0store & ~dec_tlu_flush_lower_wb;
|
|
|
|
end
|
|
|
|
|
|
rvdfflie #(.WIDTH($bits(el2_dest_pkt_t)), .LEFT(15)) wbff (.*, .en(i0_wb_ctl_en), .din(r_d_in), .dout(wbd));
|
|
|
|
assign dec_i0_waddr_r[4:0] = r_d_in.i0rd[4:0];
|
|
|
|
assign i0_wen_r = r_d_in.i0v & ~dec_tlu_i0_kill_writeb_r;
|
|
assign dec_i0_wen_r = i0_wen_r & ~r_d_in.i0div & ~i0_load_kill_wen_r; // don't write a nonblock load 1st time down the pipe
|
|
assign dec_i0_wdata_r[31:0] = i0_result_corr_r[31:0];
|
|
|
|
|
|
// divide stuff
|
|
assign div_e1_to_r = (x_d.i0div & x_d.i0valid) |
|
|
(r_d.i0div & r_d.i0valid);
|
|
|
|
assign div_active_in = i0_div_decode_d | (div_active & ~exu_div_wren & ~nonblock_div_cancel);
|
|
|
|
|
|
assign dec_div_active = div_active;
|
|
|
|
// nonblocking div scheme
|
|
|
|
assign i0_nonblock_div_stall = (dec_i0_rs1_en_d & div_active & (div_waddr_wb[4:0] == i0r.rs1[4:0])) |
|
|
(dec_i0_rs2_en_d & div_active & (div_waddr_wb[4:0] == i0r.rs2[4:0]));
|
|
|
|
|
|
assign div_flush = (x_d.i0div & x_d.i0valid & (x_d.i0rd[4:0]==5'b0) ) |
|
|
(x_d.i0div & x_d.i0valid & dec_tlu_flush_lower_r ) |
|
|
(r_d.i0div & r_d.i0valid & dec_tlu_flush_lower_r & dec_tlu_i0_kill_writeb_r);
|
|
|
|
|
|
// cancel if any younger inst committing this cycle to same dest as nonblock divide
|
|
assign nonblock_div_cancel = (div_active & div_flush) |
|
|
(div_active & ~div_e1_to_r & (r_d.i0rd[4:0] == div_waddr_wb[4:0]) & i0_wen_r);
|
|
|
|
assign dec_div_cancel = nonblock_div_cancel;
|
|
|
|
|
|
|
|
assign i0_div_decode_d = i0_legal_decode_d & i0_dp.div;
|
|
|
|
// for load_to_use_plus1, the load result data is merged in R stage instead of D
|
|
|
|
if ( pt.LOAD_TO_USE_PLUS1 == 1 ) begin : genblock1
|
|
assign i0_result_x[31:0] = exu_i0_result_x[31:0];
|
|
assign i0_result_r[31:0] = (r_d.i0v & r_d.i0load) ? lsu_result_m[31:0] : i0_result_r_raw[31:0];
|
|
end
|
|
else begin : genblock1
|
|
assign i0_result_x[31:0] = (x_d.i0v & x_d.i0load) ? lsu_result_m[31:0] : exu_i0_result_x[31:0];
|
|
assign i0_result_r[31:0] = i0_result_r_raw[31:0];
|
|
end
|
|
|
|
|
|
rvdffe #(32) i0_result_r_ff (.*, .en(i0_r_data_en & (x_d.i0v | x_d.csrwen | debug_valid_x)), .din(i0_result_x[31:0]), .dout(i0_result_r_raw[31:0]));
|
|
|
|
// correct lsu load data - don't use for bypass, do pass down the pipe
|
|
assign i0_result_corr_r[31:0] = (r_d.i0v & r_d.i0load) ? lsu_result_corr_r[31:0] : i0_result_r_raw[31:0];
|
|
|
|
|
|
rvdffe #(12) e1brpcff (.*, .en(i0_x_data_en), .din(last_br_immed_d[12:1] ), .dout(last_br_immed_x[12:1]));
|
|
|
|
|
|
|
|
assign i0_wb_en = i0_wb_data_en;
|
|
|
|
assign i0_inst_wb_in[31:0] = i0_inst_r[31:0];
|
|
assign i0_inst_d[31:0] = (dec_i0_pc4_d) ? i0[31:0] : {16'b0, ifu_i0_cinst[15:0]};
|
|
|
|
|
|
assign trace_enable = ~dec_tlu_trace_disable;
|
|
|
|
|
|
rvdffe #(.WIDTH(5),.OVERRIDE(1)) i0rdff (.*, .en(i0_div_decode_d), .din(i0r.rd[4:0]), .dout(div_waddr_wb[4:0]));
|
|
|
|
rvdffe #(32) i0xinstff (.*, .en(i0_x_data_en & trace_enable), .din(i0_inst_d[31:0]), .dout(i0_inst_x[31:0]));
|
|
rvdffe #(32) i0cinstff (.*, .en(i0_r_data_en & trace_enable), .din(i0_inst_x[31:0]), .dout(i0_inst_r[31:0]));
|
|
|
|
rvdffe #(32) i0wbinstff (.*, .en(i0_wb_en & trace_enable), .din(i0_inst_wb_in[31:0]), .dout(i0_inst_wb[31:0]));
|
|
rvdffe #(31) i0wbpcff (.*, .en(i0_wb_en & trace_enable), .din(dec_tlu_i0_pc_r[31:1]), .dout( i0_pc_wb[31:1]));
|
|
|
|
assign dec_i0_inst_wb[31:0] = i0_inst_wb[31:0];
|
|
assign dec_i0_pc_wb[31:1] = i0_pc_wb[31:1];
|
|
|
|
|
|
|
|
rvdffpcie #(31) i0_pc_r_ff (.*, .en(i0_r_data_en), .din(exu_i0_pc_x[31:1]), .dout(dec_i0_pc_r[31:1]));
|
|
|
|
assign dec_tlu_i0_pc_r[31:1] = dec_i0_pc_r[31:1];
|
|
|
|
|
|
rvbradder ibradder_correct (
|
|
.pc(exu_i0_pc_x[31:1]),
|
|
.offset(last_br_immed_x[12:1]),
|
|
.dout(pred_correct_npc_x[31:1]));
|
|
|
|
|
|
|
|
// add nonblock load rs1/rs2 bypass cases
|
|
|
|
assign i0_rs1_nonblock_load_bypass_en_d = dec_i0_rs1_en_d & dec_nonblock_load_wen & (dec_nonblock_load_waddr[4:0] == i0r.rs1[4:0]);
|
|
|
|
assign i0_rs2_nonblock_load_bypass_en_d = dec_i0_rs2_en_d & dec_nonblock_load_wen & (dec_nonblock_load_waddr[4:0] == i0r.rs2[4:0]);
|
|
|
|
|
|
|
|
// bit 2 is priority match, bit 0 lowest priority, i0_x, i0_r
|
|
|
|
assign i0_rs1bypass[2] = i0_rs1_depth_d[0] & (i0_rs1_class_d.alu | i0_rs1_class_d.mul );
|
|
assign i0_rs1bypass[1] = i0_rs1_depth_d[0] & ( i0_rs1_class_d.load);
|
|
assign i0_rs1bypass[0] = i0_rs1_depth_d[1] & (i0_rs1_class_d.alu | i0_rs1_class_d.mul | i0_rs1_class_d.load);
|
|
|
|
assign i0_rs2bypass[2] = i0_rs2_depth_d[0] & (i0_rs2_class_d.alu | i0_rs2_class_d.mul );
|
|
assign i0_rs2bypass[1] = i0_rs2_depth_d[0] & ( i0_rs2_class_d.load);
|
|
assign i0_rs2bypass[0] = i0_rs2_depth_d[1] & (i0_rs2_class_d.alu | i0_rs2_class_d.mul | i0_rs2_class_d.load);
|
|
|
|
|
|
assign dec_i0_rs1_bypass_en_d[3] = i0_rs1_nonblock_load_bypass_en_d & ~i0_rs1bypass[0] & ~i0_rs1bypass[1] & ~i0_rs1bypass[2];
|
|
assign dec_i0_rs1_bypass_en_d[2] = i0_rs1bypass[2];
|
|
assign dec_i0_rs1_bypass_en_d[1] = i0_rs1bypass[1];
|
|
assign dec_i0_rs1_bypass_en_d[0] = i0_rs1bypass[0];
|
|
|
|
assign dec_i0_rs2_bypass_en_d[3] = i0_rs2_nonblock_load_bypass_en_d & ~i0_rs2bypass[0] & ~i0_rs2bypass[1] & ~i0_rs2bypass[2];
|
|
assign dec_i0_rs2_bypass_en_d[2] = i0_rs2bypass[2];
|
|
assign dec_i0_rs2_bypass_en_d[1] = i0_rs2bypass[1];
|
|
assign dec_i0_rs2_bypass_en_d[0] = i0_rs2bypass[0];
|
|
|
|
|
|
assign dec_i0_result_r[31:0] = i0_result_r[31:0];
|
|
|
|
|
|
endmodule // el2_dec_decode_ctl
|
|
|
|
|
|
|
|
|
|
|
|
// file "decode" is human readable file that has all of the instruction decodes defined and is part of git repo
|
|
// modify this file as needed
|
|
|
|
// to generate all the equations below from "decode" except legal equation:
|
|
|
|
// 1) coredecode -in decode > coredecode.e
|
|
|
|
// 2) espresso -Dso -oeqntott coredecode.e | addassign -pre out. > equations
|
|
|
|
// to generate the legal (32b instruction is legal) equation below:
|
|
|
|
// 1) coredecode -in decode -legal > legal.e
|
|
|
|
// 2) espresso -Dso -oeqntott legal.e | addassign -pre out. > legal_equation
|
|
|
|
module el2_dec_dec_ctl
|
|
import el2_pkg::*;
|
|
(
|
|
input logic [31:0] inst,
|
|
|
|
output el2_dec_pkt_t out
|
|
);
|
|
|
|
logic [31:0] i;
|
|
|
|
|
|
assign i[31:0] = inst[31:0];
|
|
|
|
assign out.alu = (i[30]&i[24]&i[23]&!i[22]&!i[21]&!i[20]&i[14]&!i[5]&i[4]) | (i[30]
|
|
&!i[27]&!i[24]&i[4]) | (!i[30]&!i[25]&i[13]&i[12]) | (!i[29]&!i[27]
|
|
&!i[5]&i[4]) | (i[27]&i[25]&i[14]&i[4]) | (!i[29]&!i[25]&!i[13]&!i[12]
|
|
&i[4]) | (i[29]&i[27]&!i[14]&i[12]&i[4]) | (!i[27]&i[14]&!i[5]&i[4]) | (
|
|
i[30]&!i[29]&!i[13]&i[4]) | (!i[27]&!i[25]&i[5]&i[4]) | (i[13]&!i[5]
|
|
&i[4]) | (i[2]) | (i[6]) | (!i[30]&i[29]&!i[24]&!i[23]&i[22]&i[21]
|
|
&i[20]&!i[5]&i[4]) | (!i[12]&!i[5]&i[4]);
|
|
|
|
assign out.rs1 = (!i[13]&i[11]&!i[2]) | (!i[13]&i[10]&!i[2]) | (i[19]&i[13]&!i[2]) | (
|
|
!i[13]&i[9]&!i[2]) | (i[18]&i[13]&!i[2]) | (!i[13]&i[8]&!i[2]) | (
|
|
i[17]&i[13]&!i[2]) | (!i[13]&i[7]&!i[2]) | (i[16]&i[13]&!i[2]) | (
|
|
i[15]&i[13]&!i[2]) | (!i[4]&!i[2]) | (!i[14]&!i[13]&i[6]&!i[3]) | (
|
|
!i[6]&!i[2]);
|
|
|
|
assign out.rs2 = (i[5]&!i[4]&!i[2]) | (!i[6]&i[5]&!i[2]);
|
|
|
|
assign out.imm12 = (!i[4]&!i[3]&i[2]) | (i[13]&!i[5]&i[4]&!i[2]) | (!i[13]&!i[12]
|
|
&i[6]&i[4]) | (!i[12]&!i[5]&i[4]&!i[2]);
|
|
|
|
assign out.rd = (!i[5]&!i[2]) | (i[5]&i[2]) | (i[4]);
|
|
|
|
assign out.shimm5 = (!i[29]&!i[13]&i[12]&!i[5]&i[4]&!i[2]) | (i[27]&!i[13]&i[12]
|
|
&!i[5]&i[4]&!i[2]) | (i[14]&!i[13]&i[12]&!i[5]&i[4]&!i[2]);
|
|
|
|
assign out.imm20 = (i[5]&i[3]) | (i[4]&i[2]);
|
|
|
|
assign out.pc = (!i[5]&!i[3]&i[2]) | (i[5]&i[3]);
|
|
|
|
assign out.load = (!i[5]&!i[4]&!i[2]);
|
|
|
|
assign out.store = (!i[6]&i[5]&!i[4]);
|
|
|
|
assign out.lsu = (!i[6]&!i[4]&!i[2]);
|
|
|
|
assign out.add = (!i[14]&!i[13]&!i[12]&!i[5]&i[4]) | (!i[5]&!i[3]&i[2]) | (!i[30]
|
|
&!i[25]&!i[14]&!i[13]&!i[12]&!i[6]&i[4]&!i[2]);
|
|
|
|
assign out.sub = (i[30]&!i[14]&!i[12]&!i[6]&i[5]&i[4]&!i[2]) | (!i[29]&!i[25]&!i[14]
|
|
&i[13]&!i[6]&i[4]&!i[2]) | (i[27]&i[25]&i[14]&!i[6]&i[5]&!i[2]) | (
|
|
!i[14]&i[13]&!i[5]&i[4]&!i[2]) | (i[6]&!i[4]&!i[2]);
|
|
|
|
assign out.land = (!i[27]&!i[25]&i[14]&i[13]&i[12]&!i[6]&!i[2]) | (i[14]&i[13]&i[12]
|
|
&!i[5]&!i[2]);
|
|
|
|
assign out.lor = (!i[6]&i[3]) | (!i[29]&!i[27]&!i[25]&i[14]&i[13]&!i[12]&!i[6]&!i[2]) | (
|
|
i[5]&i[4]&i[2]) | (!i[13]&!i[12]&i[6]&i[4]) | (i[14]&i[13]&!i[12]
|
|
&!i[5]&!i[2]);
|
|
|
|
assign out.lxor = (!i[29]&!i[27]&!i[25]&i[14]&!i[13]&!i[12]&i[4]&!i[2]) | (i[14]
|
|
&!i[13]&!i[12]&!i[5]&i[4]&!i[2]);
|
|
|
|
assign out.sll = (!i[29]&!i[27]&!i[25]&!i[14]&!i[13]&i[12]&!i[6]&i[4]&!i[2]);
|
|
|
|
assign out.sra = (i[30]&!i[29]&!i[27]&!i[13]&i[12]&!i[6]&i[4]&!i[2]);
|
|
|
|
assign out.srl = (!i[30]&!i[27]&!i[25]&i[14]&!i[13]&i[12]&!i[6]&i[4]&!i[2]);
|
|
|
|
assign out.slt = (!i[29]&!i[25]&!i[14]&i[13]&!i[6]&i[4]&!i[2]) | (!i[14]&i[13]&!i[5]
|
|
&i[4]&!i[2]);
|
|
|
|
assign out.unsign = (!i[14]&i[13]&i[12]&!i[5]&!i[2]) | (i[13]&i[6]&!i[4]&!i[2]) | (
|
|
i[14]&!i[5]&!i[4]) | (!i[25]&!i[14]&i[13]&i[12]&!i[6]&!i[2]) | (
|
|
i[25]&i[14]&i[12]&!i[6]&i[5]&!i[2]);
|
|
|
|
assign out.condbr = (i[6]&!i[4]&!i[2]);
|
|
|
|
assign out.beq = (!i[14]&!i[12]&i[6]&!i[4]&!i[2]);
|
|
|
|
assign out.bne = (!i[14]&i[12]&i[6]&!i[4]&!i[2]);
|
|
|
|
assign out.bge = (i[14]&i[12]&i[5]&!i[4]&!i[2]);
|
|
|
|
assign out.blt = (i[14]&!i[12]&i[5]&!i[4]&!i[2]);
|
|
|
|
assign out.jal = (i[6]&i[2]);
|
|
|
|
assign out.by = (!i[13]&!i[12]&!i[6]&!i[4]&!i[2]);
|
|
|
|
assign out.half = (i[12]&!i[6]&!i[4]&!i[2]);
|
|
|
|
assign out.word = (i[13]&!i[6]&!i[4]);
|
|
|
|
assign out.csr_read = (i[13]&i[6]&i[4]) | (i[7]&i[6]&i[4]) | (i[8]&i[6]&i[4]) | (
|
|
i[9]&i[6]&i[4]) | (i[10]&i[6]&i[4]) | (i[11]&i[6]&i[4]);
|
|
|
|
assign out.csr_clr = (i[15]&i[13]&i[12]&i[6]&i[4]) | (i[16]&i[13]&i[12]&i[6]&i[4]) | (
|
|
i[17]&i[13]&i[12]&i[6]&i[4]) | (i[18]&i[13]&i[12]&i[6]&i[4]) | (
|
|
i[19]&i[13]&i[12]&i[6]&i[4]);
|
|
|
|
assign out.csr_set = (i[15]&!i[12]&i[6]&i[4]) | (i[16]&!i[12]&i[6]&i[4]) | (i[17]
|
|
&!i[12]&i[6]&i[4]) | (i[18]&!i[12]&i[6]&i[4]) | (i[19]&!i[12]&i[6]
|
|
&i[4]);
|
|
|
|
assign out.csr_write = (!i[13]&i[12]&i[6]&i[4]);
|
|
|
|
assign out.csr_imm = (i[14]&!i[13]&i[6]&i[4]) | (i[15]&i[14]&i[6]&i[4]) | (i[16]
|
|
&i[14]&i[6]&i[4]) | (i[17]&i[14]&i[6]&i[4]) | (i[18]&i[14]&i[6]&i[4]) | (
|
|
i[19]&i[14]&i[6]&i[4]);
|
|
|
|
assign out.presync = (!i[5]&i[3]) | (!i[13]&i[7]&i[6]&i[4]) | (!i[13]&i[8]&i[6]&i[4]) | (
|
|
!i[13]&i[9]&i[6]&i[4]) | (!i[13]&i[10]&i[6]&i[4]) | (!i[13]&i[11]
|
|
&i[6]&i[4]) | (i[15]&i[13]&i[6]&i[4]) | (i[16]&i[13]&i[6]&i[4]) | (
|
|
i[17]&i[13]&i[6]&i[4]) | (i[18]&i[13]&i[6]&i[4]) | (i[19]&i[13]&i[6]
|
|
&i[4]);
|
|
|
|
assign out.postsync = (i[12]&!i[5]&i[3]) | (!i[22]&!i[13]&!i[12]&i[6]&i[4]) | (
|
|
!i[13]&i[7]&i[6]&i[4]) | (!i[13]&i[8]&i[6]&i[4]) | (!i[13]&i[9]&i[6]
|
|
&i[4]) | (!i[13]&i[10]&i[6]&i[4]) | (!i[13]&i[11]&i[6]&i[4]) | (
|
|
i[15]&i[13]&i[6]&i[4]) | (i[16]&i[13]&i[6]&i[4]) | (i[17]&i[13]&i[6]
|
|
&i[4]) | (i[18]&i[13]&i[6]&i[4]) | (i[19]&i[13]&i[6]&i[4]);
|
|
|
|
assign out.ebreak = (!i[22]&i[20]&!i[13]&!i[12]&i[6]&i[4]);
|
|
|
|
assign out.ecall = (!i[21]&!i[20]&!i[13]&!i[12]&i[6]&i[4]);
|
|
|
|
assign out.mret = (i[29]&!i[13]&!i[12]&i[6]&i[4]);
|
|
|
|
assign out.mul = (i[29]&!i[27]&i[24]&!i[14]&!i[13]&i[12]&!i[5]&i[4]&!i[2]) | (i[30]
|
|
&i[27]&i[13]&!i[6]&i[5]&i[4]&!i[2]) | (i[29]&i[27]&!i[23]&!i[20]
|
|
&i[14]&!i[13]&i[12]&!i[5]&i[4]&!i[2]) | (i[29]&i[27]&!i[21]&i[20]
|
|
&i[14]&!i[13]&i[12]&!i[5]&i[4]&!i[2]) | (i[29]&i[27]&i[24]&i[21]
|
|
&i[14]&!i[13]&i[12]&!i[5]&i[4]&!i[2]) | (i[29]&i[27]&!i[24]&!i[22]
|
|
&i[14]&!i[13]&i[12]&!i[5]&i[4]&!i[2]) | (!i[30]&i[29]&i[23]&i[14]
|
|
&!i[13]&i[12]&!i[5]&i[4]&!i[2]) | (i[30]&i[29]&i[27]&i[22]&i[14]
|
|
&!i[13]&i[12]&!i[5]&i[4]&!i[2]) | (i[27]&!i[25]&i[13]&!i[12]&!i[6]
|
|
&i[5]&i[4]&!i[2]) | (!i[30]&!i[29]&i[27]&!i[25]&!i[13]&i[12]&!i[6]
|
|
&i[4]&!i[2]) | (i[25]&!i[14]&!i[6]&i[5]&i[4]&!i[2]) | (i[29]&i[27]
|
|
&i[14]&!i[6]&i[5]&!i[2]);
|
|
|
|
assign out.rs1_sign = (!i[27]&i[25]&!i[14]&i[13]&!i[12]&!i[6]&i[5]&i[4]&!i[2]) | (
|
|
!i[27]&i[25]&!i[14]&!i[13]&i[12]&!i[6]&i[4]&!i[2]);
|
|
|
|
assign out.rs2_sign = (!i[27]&i[25]&!i[14]&!i[13]&i[12]&!i[6]&i[4]&!i[2]);
|
|
|
|
assign out.low = (i[25]&!i[14]&!i[13]&!i[12]&i[5]&i[4]&!i[2]);
|
|
|
|
assign out.div = (!i[27]&i[25]&i[14]&!i[6]&i[5]&!i[2]);
|
|
|
|
assign out.rem = (!i[27]&i[25]&i[14]&i[13]&!i[6]&i[5]&!i[2]);
|
|
|
|
assign out.fence = (!i[5]&i[3]);
|
|
|
|
assign out.fence_i = (i[12]&!i[5]&i[3]);
|
|
|
|
assign out.clz = (i[29]&!i[27]&!i[24]&!i[22]&!i[21]&!i[20]&!i[14]&!i[13]&i[12]&!i[5]
|
|
&i[4]&!i[2]);
|
|
|
|
assign out.ctz = (i[29]&!i[27]&!i[24]&!i[22]&i[20]&!i[14]&!i[13]&i[12]&!i[5]&i[4]
|
|
&!i[2]);
|
|
|
|
assign out.cpop = (i[29]&!i[27]&!i[24]&i[21]&!i[14]&!i[13]&i[12]&!i[5]&i[4]&!i[2]);
|
|
|
|
assign out.sext_b = (i[29]&!i[27]&i[22]&!i[20]&!i[14]&!i[13]&i[12]&!i[5]&i[4]&!i[2]);
|
|
|
|
assign out.sext_h = (i[29]&!i[27]&i[22]&i[20]&!i[14]&!i[13]&i[12]&!i[5]&i[4]&!i[2]);
|
|
|
|
assign out.min = (i[27]&i[25]&i[14]&!i[13]&!i[6]&i[5]&!i[2]);
|
|
|
|
assign out.max = (i[27]&i[25]&i[14]&i[13]&!i[6]&i[5]&!i[2]);
|
|
|
|
assign out.pack = (!i[30]&!i[29]&i[27]&!i[25]&!i[13]&!i[12]&i[5]&i[4]&!i[2]);
|
|
|
|
assign out.packu = (i[30]&i[27]&!i[13]&!i[12]&i[5]&i[4]&!i[2]);
|
|
|
|
assign out.packh = (!i[30]&i[27]&!i[25]&i[13]&i[12]&!i[6]&i[5]&!i[2]);
|
|
|
|
assign out.rol = (i[29]&!i[27]&!i[14]&i[12]&!i[6]&i[5]&i[4]&!i[2]);
|
|
|
|
assign out.ror = (i[29]&!i[27]&i[14]&!i[13]&i[12]&!i[6]&i[4]&!i[2]);
|
|
|
|
assign out.zbb = (!i[30]&!i[29]&i[27]&!i[24]&!i[23]&!i[22]&!i[21]&!i[20]&!i[13]
|
|
&!i[12]&i[5]&i[4]&!i[2]) | (i[29]&!i[27]&!i[24]&!i[13]&i[12]&!i[5]
|
|
&i[4]&!i[2]) | (i[29]&!i[27]&i[14]&!i[13]&i[12]&!i[5]&i[4]&!i[2]) | (
|
|
i[30]&!i[27]&i[14]&!i[12]&!i[6]&i[5]&!i[2]) | (i[30]&!i[27]&i[13]
|
|
&!i[6]&i[5]&i[4]&!i[2]) | (i[29]&!i[27]&i[12]&!i[6]&i[5]&i[4]&!i[2]) | (
|
|
!i[30]&i[29]&!i[24]&!i[23]&i[22]&i[21]&i[20]&i[14]&!i[13]&i[12]&!i[5]
|
|
&i[4]&!i[2]) | (i[30]&i[29]&i[24]&i[23]&!i[22]&!i[21]&!i[20]&i[14]
|
|
&!i[13]&i[12]&!i[5]&i[4]&!i[2]) | (i[27]&i[25]&i[14]&!i[6]&i[5]&!i[2]);
|
|
|
|
assign out.bset = (!i[30]&i[29]&!i[14]&!i[13]&i[12]&!i[6]&i[4]&!i[2]);
|
|
|
|
assign out.bclr = (i[30]&!i[29]&!i[14]&!i[13]&i[12]&!i[6]&i[4]&!i[2]);
|
|
|
|
assign out.binv = (i[30]&i[29]&i[27]&!i[14]&!i[13]&i[12]&!i[6]&i[4]&!i[2]);
|
|
|
|
assign out.bext = (i[30]&!i[29]&i[27]&i[14]&!i[13]&i[12]&!i[6]&i[4]&!i[2]);
|
|
|
|
assign out.zbs = (i[29]&i[27]&!i[14]&!i[13]&i[12]&!i[6]&i[4]&!i[2]) | (i[30]&!i[29]
|
|
&i[27]&!i[13]&i[12]&!i[6]&i[4]&!i[2]);
|
|
|
|
assign out.bcompress = (!i[30]&!i[29]&i[27]&!i[25]&i[13]&!i[12]&!i[6]&i[5]&i[4]&!i[2]);
|
|
|
|
assign out.bdecompress = (i[30]&i[27]&i[13]&!i[12]&!i[6]&i[5]&i[4]&!i[2]);
|
|
|
|
assign out.zbe = (i[30]&i[27]&i[14]&i[13]&!i[12]&!i[6]&i[5]&!i[2]) | (!i[30]&i[27]
|
|
&!i[25]&i[13]&i[12]&!i[6]&i[5]&!i[2]) | (!i[30]&!i[29]&i[27]&!i[25]
|
|
&!i[12]&!i[6]&i[5]&i[4]&!i[2]);
|
|
|
|
assign out.clmul = (i[27]&i[25]&!i[14]&!i[13]&!i[6]&i[5]&i[4]&!i[2]);
|
|
|
|
assign out.clmulh = (i[27]&!i[14]&i[13]&i[12]&!i[6]&i[5]&!i[2]);
|
|
|
|
assign out.clmulr = (i[27]&i[25]&!i[14]&!i[12]&!i[6]&i[5]&i[4]&!i[2]);
|
|
|
|
assign out.zbc = (i[27]&i[25]&!i[14]&!i[6]&i[5]&i[4]&!i[2]);
|
|
|
|
assign out.grev = (i[30]&i[29]&i[27]&i[14]&!i[13]&i[12]&!i[6]&i[4]&!i[2]);
|
|
|
|
assign out.gorc = (!i[30]&i[29]&i[14]&!i[13]&i[12]&!i[6]&i[4]&!i[2]);
|
|
|
|
assign out.shfl = (!i[30]&!i[29]&i[27]&!i[25]&!i[14]&!i[13]&i[12]&!i[6]&i[4]&!i[2]);
|
|
|
|
assign out.unshfl = (!i[30]&!i[29]&i[27]&!i[25]&i[14]&!i[13]&i[12]&!i[6]&i[4]&!i[2]);
|
|
|
|
assign out.xperm_n = (i[29]&i[27]&!i[14]&!i[12]&!i[6]&i[5]&i[4]&!i[2]);
|
|
|
|
assign out.xperm_b = (i[29]&i[27]&!i[13]&!i[12]&i[5]&i[4]&!i[2]);
|
|
|
|
assign out.xperm_h = (i[29]&i[27]&i[14]&i[13]&!i[6]&i[5]&!i[2]);
|
|
|
|
assign out.zbp = (i[30]&!i[27]&!i[14]&i[12]&!i[6]&i[5]&i[4]&!i[2]) | (!i[30]&i[27]
|
|
&!i[25]&i[13]&i[12]&!i[6]&i[5]&!i[2]) | (i[30]&!i[27]&i[13]&!i[6]
|
|
&i[5]&i[4]&!i[2]) | (i[27]&!i[25]&!i[13]&!i[12]&i[5]&i[4]&!i[2]) | (
|
|
i[30]&i[14]&!i[13]&!i[12]&i[5]&i[4]&!i[2]) | (i[29]&i[27]&!i[12]&!i[6]
|
|
&i[5]&i[4]&!i[2]) | (!i[30]&!i[29]&i[27]&!i[25]&!i[13]&i[12]&!i[6]
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&i[4]&!i[2]) | (i[29]&i[14]&!i[13]&i[12]&!i[6]&i[4]&!i[2]);
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assign out.crc32_b = (i[29]&!i[27]&i[24]&!i[23]&!i[21]&!i[20]&!i[14]&!i[13]&i[12]
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&!i[5]&i[4]&!i[2]);
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assign out.crc32_h = (i[29]&!i[27]&i[24]&!i[23]&i[20]&!i[14]&!i[13]&i[12]&!i[5]&i[4]
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&!i[2]);
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assign out.crc32_w = (i[29]&!i[27]&i[24]&!i[23]&i[21]&!i[14]&!i[13]&i[12]&!i[5]&i[4]
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&!i[2]);
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assign out.crc32c_b = (i[29]&!i[27]&i[23]&!i[21]&!i[20]&!i[14]&!i[13]&i[12]&!i[5]
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&i[4]&!i[2]);
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assign out.crc32c_h = (i[29]&!i[27]&i[23]&i[20]&!i[14]&!i[13]&i[12]&!i[5]&i[4]&!i[2]);
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assign out.crc32c_w = (i[29]&!i[27]&i[23]&i[21]&!i[14]&!i[13]&i[12]&!i[5]&i[4]&!i[2]);
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assign out.zbr = (i[29]&!i[27]&i[24]&!i[14]&!i[13]&i[12]&!i[5]&i[4]&!i[2]);
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assign out.bfp = (i[30]&i[27]&i[13]&i[12]&!i[6]&i[5]&!i[2]);
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assign out.zbf = (!i[30]&!i[29]&i[27]&!i[25]&!i[13]&!i[12]&i[5]&i[4]&!i[2]) | (
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i[27]&!i[25]&i[13]&i[12]&!i[6]&i[5]&!i[2]);
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assign out.sh1add = (i[29]&!i[27]&!i[14]&!i[12]&!i[6]&i[5]&i[4]&!i[2]);
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assign out.sh2add = (i[29]&!i[27]&i[14]&!i[13]&!i[12]&i[5]&i[4]&!i[2]);
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assign out.sh3add = (i[29]&!i[27]&i[14]&i[13]&!i[6]&i[5]&!i[2]);
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assign out.zba = (i[29]&!i[27]&!i[12]&!i[6]&i[5]&i[4]&!i[2]);
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assign out.pm_alu = (i[28]&i[20]&!i[13]&!i[12]&i[4]) | (!i[30]&!i[29]&!i[27]&!i[25]
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&!i[6]&i[4]) | (!i[29]&!i[27]&!i[25]&!i[13]&i[12]&!i[6]&i[4]) | (
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!i[29]&!i[27]&!i[25]&!i[14]&!i[6]&i[4]) | (i[13]&!i[5]&i[4]) | (i[4]
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&i[2]) | (!i[12]&!i[5]&i[4]);
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assign out.legal = (!i[31]&!i[30]&i[29]&i[28]&!i[27]&!i[26]&!i[25]&!i[24]&!i[23]
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&!i[22]&i[21]&!i[20]&!i[19]&!i[18]&!i[17]&!i[16]&!i[15]&!i[14]&!i[11]
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&!i[10]&!i[9]&!i[8]&!i[7]&i[6]&i[5]&i[4]&!i[3]&!i[2]&i[1]&i[0]) | (
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!i[31]&!i[30]&!i[29]&i[28]&!i[27]&!i[26]&!i[25]&!i[24]&!i[23]&i[22]
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&!i[21]&i[20]&!i[19]&!i[18]&!i[17]&!i[16]&!i[15]&!i[14]&!i[11]&!i[10]
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&!i[9]&!i[8]&!i[7]&i[6]&i[5]&i[4]&!i[3]&!i[2]&i[1]&i[0]) | (!i[31]
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&!i[30]&!i[29]&!i[28]&!i[27]&!i[26]&!i[25]&!i[24]&!i[23]&!i[22]&!i[21]
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&!i[19]&!i[18]&!i[17]&!i[16]&!i[15]&!i[14]&!i[11]&!i[10]&!i[9]&!i[8]
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&!i[7]&i[5]&i[4]&!i[3]&!i[2]&i[1]&i[0]) | (!i[31]&i[30]&i[29]&!i[28]
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&!i[26]&!i[25]&i[24]&!i[22]&!i[20]&!i[6]&!i[5]&i[4]&!i[3]&i[1]&i[0]) | (
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!i[31]&i[30]&i[29]&!i[28]&!i[26]&!i[25]&i[24]&!i[22]&!i[21]&!i[6]
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&!i[5]&i[4]&!i[3]&i[1]&i[0]) | (!i[31]&i[30]&i[29]&!i[28]&!i[26]
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&!i[25]&!i[23]&!i[22]&!i[20]&!i[6]&!i[5]&i[4]&!i[3]&i[1]&i[0]) | (
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!i[31]&i[30]&i[29]&!i[28]&!i[26]&!i[25]&!i[24]&!i[23]&!i[21]&!i[6]
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&!i[5]&i[4]&!i[3]&i[1]&i[0]) | (!i[31]&!i[30]&!i[29]&!i[28]&!i[26]
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&i[25]&i[13]&!i[6]&i[4]&!i[3]&i[1]&i[0]) | (!i[31]&!i[28]&i[27]&!i[26]
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&!i[25]&!i[24]&!i[6]&!i[5]&i[4]&!i[3]&i[1]&i[0]) | (!i[31]&!i[30]
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&i[29]&!i[28]&!i[26]&!i[25]&i[13]&!i[12]&!i[6]&i[4]&!i[3]&i[1]&i[0]) | (
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!i[31]&!i[29]&!i[28]&!i[27]&!i[26]&!i[25]&!i[13]&!i[12]&!i[6]&i[4]
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&!i[3]&i[1]&i[0]) | (!i[31]&i[30]&!i[28]&!i[26]&!i[25]&i[14]&!i[6]
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&!i[5]&i[4]&!i[3]&i[1]&i[0]) | (!i[31]&!i[30]&!i[29]&!i[28]&!i[26]
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&!i[13]&i[12]&i[5]&i[4]&!i[3]&!i[2]&i[1]&i[0]) | (!i[31]&!i[30]&!i[29]
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&!i[28]&!i[27]&!i[26]&!i[25]&!i[6]&i[4]&!i[3]&i[1]&i[0]) | (!i[31]
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&i[30]&i[29]&!i[28]&!i[26]&!i[25]&!i[13]&i[12]&i[5]&i[4]&!i[3]&!i[2]
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&i[1]&i[0]) | (!i[31]&i[30]&!i[28]&i[27]&!i[26]&!i[25]&!i[13]&i[12]
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&!i[6]&i[4]&!i[3]&i[1]&i[0]) | (!i[31]&!i[29]&!i[28]&!i[26]&!i[25]
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&i[14]&!i[6]&i[5]&i[4]&!i[3]&i[1]&i[0]) | (!i[31]&i[29]&!i[28]&i[27]
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&!i[26]&!i[25]&!i[13]&i[12]&!i[6]&i[4]&!i[3]&i[1]&i[0]) | (!i[31]
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&!i[30]&!i[29]&!i[28]&!i[27]&!i[26]&!i[6]&i[5]&i[4]&!i[3]&i[1]&i[0]) | (
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!i[31]&!i[30]&!i[29]&!i[28]&!i[26]&i[14]&!i[6]&i[5]&i[4]&!i[3]&i[1]
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&i[0]) | (!i[14]&!i[13]&!i[12]&i[6]&i[5]&!i[4]&!i[3]&i[1]&i[0]) | (
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i[14]&i[6]&i[5]&!i[4]&!i[3]&!i[2]&i[1]&i[0]) | (!i[14]&!i[13]&i[5]
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&!i[4]&!i[3]&!i[2]&i[1]&i[0]) | (!i[12]&!i[6]&!i[5]&i[4]&!i[3]&i[1]
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&i[0]) | (!i[13]&i[12]&i[6]&i[5]&!i[3]&!i[2]&i[1]&i[0]) | (!i[31]
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&!i[30]&!i[29]&!i[28]&!i[27]&!i[26]&!i[25]&!i[24]&!i[23]&!i[22]&!i[21]
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&!i[20]&!i[19]&!i[18]&!i[17]&!i[16]&!i[15]&!i[14]&!i[13]&!i[11]&!i[10]
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&!i[9]&!i[8]&!i[7]&!i[6]&!i[5]&!i[4]&i[3]&i[2]&i[1]&i[0]) | (!i[31]
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&!i[30]&!i[29]&!i[28]&!i[19]&!i[18]&!i[17]&!i[16]&!i[15]&!i[14]&!i[13]
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&!i[12]&!i[11]&!i[10]&!i[9]&!i[8]&!i[7]&!i[6]&!i[5]&!i[4]&i[3]&i[2]
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&i[1]&i[0]) | (i[13]&i[6]&i[5]&i[4]&!i[3]&!i[2]&i[1]&i[0]) | (!i[31]
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&!i[30]&!i[28]&!i[26]&!i[25]&i[14]&!i[12]&!i[6]&i[4]&!i[3]&i[1]&i[0]) | (
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i[6]&i[5]&!i[4]&i[3]&i[2]&i[1]&i[0]) | (!i[14]&!i[12]&!i[6]&!i[4]
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&!i[3]&!i[2]&i[1]&i[0]) | (!i[13]&!i[6]&!i[5]&!i[4]&!i[3]&!i[2]&i[1]
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&i[0]) | (i[13]&!i[6]&!i[5]&i[4]&!i[3]&i[1]&i[0]) | (!i[6]&i[4]&!i[3]
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&i[2]&i[1]&i[0]);
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endmodule // el2_dec_dec_ctl
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