// SPDX-License-Identifier: Apache-2.0 // Copyright 2020 Western Digital Corporation or its affiliates. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. //******************************************************************************** // $Id$ // // // Owner: // Function: Store Buffer // Comments: Dual writes and single drain // // // DC1 -> DC2 -> DC3 -> DC4 (Commit) // // //******************************************************************************** module el2_lsu_stbuf import el2_pkg::*; #( `include "el2_param.vh" ) ( input logic clk, // core clock input logic rst_l, // reset input logic lsu_stbuf_c1_clk, // stbuf clock input logic lsu_free_c2_clk, // free clk // Store Buffer input input logic store_stbuf_reqvld_r, // core instruction goes to stbuf input logic lsu_commit_r, // lsu commits input logic dec_lsu_valid_raw_d, // Speculative decode valid input logic [pt.DCCM_DATA_WIDTH-1:0] store_data_hi_r, // merged data from the dccm for stores. This is used for fwding input logic [pt.DCCM_DATA_WIDTH-1:0] store_data_lo_r, // merged data from the dccm for stores. This is used for fwding input logic [pt.DCCM_DATA_WIDTH-1:0] store_datafn_hi_r, // merged data from the dccm for stores input logic [pt.DCCM_DATA_WIDTH-1:0] store_datafn_lo_r, // merged data from the dccm for stores // Store Buffer output output logic stbuf_reqvld_any, // stbuf is draining output logic stbuf_reqvld_flushed_any, // Top entry is flushed output logic [ pt.LSU_SB_BITS-1:0] stbuf_addr_any, // address output logic [pt.DCCM_DATA_WIDTH-1:0] stbuf_data_any, // stbuf data input logic lsu_stbuf_commit_any, // pop the stbuf as it commite output logic lsu_stbuf_full_any, // stbuf is full output logic lsu_stbuf_empty_any, // stbuf is empty output logic ldst_stbuf_reqvld_r, // needed for clocking input logic [pt.LSU_SB_BITS-1:0] lsu_addr_d, // lsu address D-stage input logic [ 31:0] lsu_addr_m, // lsu address M-stage input logic [ 31:0] lsu_addr_r, // lsu address R-stage input logic [pt.LSU_SB_BITS-1:0] end_addr_d, // lsu end address D-stage - needed to check unaligned input logic [31:0] end_addr_m, // lsu end address M-stage - needed to check unaligned input logic [31:0] end_addr_r, // lsu end address R-stage - needed to check unaligned input logic ldst_dual_d, ldst_dual_m, ldst_dual_r, input logic addr_in_dccm_m, // address is in dccm input logic addr_in_dccm_r, // address is in dccm // Forwarding signals input logic lsu_cmpen_m, // needed for forwarding stbuf - load input el2_lsu_pkt_t lsu_pkt_m, // LSU packet M-stage input el2_lsu_pkt_t lsu_pkt_r, // LSU packet R-stage output logic [pt.DCCM_DATA_WIDTH-1:0] stbuf_fwddata_hi_m, // stbuf data output logic [pt.DCCM_DATA_WIDTH-1:0] stbuf_fwddata_lo_m, // stbuf data output logic [pt.DCCM_BYTE_WIDTH-1:0] stbuf_fwdbyteen_hi_m, // stbuf data output logic [pt.DCCM_BYTE_WIDTH-1:0] stbuf_fwdbyteen_lo_m, // stbuf data input logic scan_mode // Scan mode ); localparam DEPTH = pt.LSU_STBUF_DEPTH; localparam DATA_WIDTH = pt.DCCM_DATA_WIDTH; localparam BYTE_WIDTH = pt.DCCM_BYTE_WIDTH; localparam DEPTH_LOG2 = $clog2(DEPTH); // These are the fields in the store queue logic [ DEPTH-1:0] stbuf_vld; logic [ DEPTH-1:0] stbuf_dma_kill; logic [ DEPTH-1:0][pt.LSU_SB_BITS-1:0] stbuf_addr; logic [ DEPTH-1:0][ BYTE_WIDTH-1:0] stbuf_byteen; logic [ DEPTH-1:0][ DATA_WIDTH-1:0] stbuf_data; logic [ DEPTH-1:0] sel_lo; logic [ DEPTH-1:0] stbuf_wr_en; logic [ DEPTH-1:0] stbuf_dma_kill_en; logic [ DEPTH-1:0] stbuf_reset; logic [ DEPTH-1:0][pt.LSU_SB_BITS-1:0] stbuf_addrin; logic [ DEPTH-1:0][ DATA_WIDTH-1:0] stbuf_datain; logic [ DEPTH-1:0][ BYTE_WIDTH-1:0] stbuf_byteenin; logic [ 7:0] store_byteen_ext_r; logic [BYTE_WIDTH-1:0] store_byteen_hi_r; logic [BYTE_WIDTH-1:0] store_byteen_lo_r; logic WrPtrEn, RdPtrEn; logic [DEPTH_LOG2-1:0] WrPtr, RdPtr; logic [DEPTH_LOG2-1:0] NxtWrPtr, NxtRdPtr; logic [DEPTH_LOG2-1:0] WrPtrPlus1, WrPtrPlus2, RdPtrPlus1; logic dual_stbuf_write_r; logic isdccmst_m, isdccmst_r; logic [3:0] stbuf_numvld_any, stbuf_specvld_any; logic [1:0] stbuf_specvld_m, stbuf_specvld_r; logic [pt.LSU_SB_BITS-1:$clog2(BYTE_WIDTH)] cmpaddr_hi_m, cmpaddr_lo_m; // variables to detect matching from the store queue logic [DEPTH-1:0] stbuf_match_hi, stbuf_match_lo; logic [DEPTH-1:0][BYTE_WIDTH-1:0] stbuf_fwdbyteenvec_hi, stbuf_fwdbyteenvec_lo; logic [DATA_WIDTH-1:0] stbuf_fwddata_hi_pre_m, stbuf_fwddata_lo_pre_m; logic [BYTE_WIDTH-1:0] stbuf_fwdbyteen_hi_pre_m, stbuf_fwdbyteen_lo_pre_m; // logic to detect matching from the pipe - needed for store - load forwarding logic [BYTE_WIDTH-1:0] ld_byte_rhit_lo_lo, ld_byte_rhit_hi_lo, ld_byte_rhit_lo_hi, ld_byte_rhit_hi_hi; logic ld_addr_rhit_lo_lo, ld_addr_rhit_hi_lo, ld_addr_rhit_lo_hi, ld_addr_rhit_hi_hi; logic [BYTE_WIDTH-1:0] ld_byte_hit_lo, ld_byte_rhit_lo; logic [BYTE_WIDTH-1:0] ld_byte_hit_hi, ld_byte_rhit_hi; logic [BYTE_WIDTH-1:0] ldst_byteen_hi_r; logic [BYTE_WIDTH-1:0] ldst_byteen_lo_r; // byte_en flowing down logic [ 7:0] ldst_byteen_r; logic [ 7:0] ldst_byteen_ext_r; // fwd data through the pipe logic [ 31:0] ld_fwddata_rpipe_lo; logic [ 31:0] ld_fwddata_rpipe_hi; // coalescing signals logic [DEPTH-1:0] store_matchvec_lo_r, store_matchvec_hi_r; logic store_coalesce_lo_r, store_coalesce_hi_r; //---------------------------------------- // Logic starts here //---------------------------------------- // Create high/low byte enables assign store_byteen_ext_r[7:0] = ldst_byteen_r[7:0] << lsu_addr_r[1:0]; assign store_byteen_hi_r[BYTE_WIDTH-1:0] = store_byteen_ext_r[7:4] & {4{lsu_pkt_r.store}}; assign store_byteen_lo_r[BYTE_WIDTH-1:0] = store_byteen_ext_r[3:0] & {4{lsu_pkt_r.store}}; assign RdPtrPlus1[DEPTH_LOG2-1:0] = RdPtr[DEPTH_LOG2-1:0] + 1'b1; assign WrPtrPlus1[DEPTH_LOG2-1:0] = WrPtr[DEPTH_LOG2-1:0] + 1'b1; assign WrPtrPlus2[DEPTH_LOG2-1:0] = WrPtr[DEPTH_LOG2-1:0] + 2'b10; // ecc error on both hi/lo assign dual_stbuf_write_r = ldst_dual_r & store_stbuf_reqvld_r; assign ldst_stbuf_reqvld_r = ((lsu_commit_r | lsu_pkt_r.dma) & store_stbuf_reqvld_r); // Store Buffer coalescing for (genvar i = 0; i < DEPTH; i++) begin : FindMatchEntry assign store_matchvec_lo_r[i] = (stbuf_addr[i][pt.LSU_SB_BITS-1:$clog2( BYTE_WIDTH )] == lsu_addr_r[pt.LSU_SB_BITS-1:$clog2( BYTE_WIDTH )]) & stbuf_vld[i] & ~stbuf_dma_kill[i] & ~stbuf_reset[i]; assign store_matchvec_hi_r[i] = (stbuf_addr[i][pt.LSU_SB_BITS-1:$clog2( BYTE_WIDTH )] == end_addr_r[pt.LSU_SB_BITS-1:$clog2( BYTE_WIDTH )]) & stbuf_vld[i] & ~stbuf_dma_kill[i] & dual_stbuf_write_r & ~stbuf_reset[i]; end : FindMatchEntry assign store_coalesce_lo_r = |store_matchvec_lo_r[DEPTH-1:0]; assign store_coalesce_hi_r = |store_matchvec_hi_r[DEPTH-1:0]; if (pt.DCCM_ENABLE == 1) begin : Gen_dccm_enable // Allocate new in this entry if : // 1. wrptr, single allocate, lo did not coalesce // 2. wrptr, double allocate, lo ^ hi coalesced // 3. wrptr + 1, double alloacte, niether lo or hi coalesced // Also update if there is a hi or a lo coalesce to this entry // Store Buffer instantiation for (genvar i = 0; i < DEPTH; i++) begin : GenStBuf assign stbuf_wr_en[i] = ldst_stbuf_reqvld_r & ( ( (i == WrPtr[DEPTH_LOG2-1:0]) & ~store_coalesce_lo_r) | // Allocate : new Lo ( (i == WrPtr[DEPTH_LOG2-1:0]) & dual_stbuf_write_r & ~store_coalesce_hi_r) | // Allocate : only 1 new Write Either ( (i == WrPtrPlus1[DEPTH_LOG2-1:0]) & dual_stbuf_write_r & ~(store_coalesce_lo_r | store_coalesce_hi_r)) | // Allocate2 : 2 new so Write Hi store_matchvec_lo_r[i] | store_matchvec_hi_r[i]); // Coalesced Write Lo or Hi assign stbuf_reset[i] = (lsu_stbuf_commit_any | stbuf_reqvld_flushed_any) & (i == RdPtr[DEPTH_LOG2-1:0]); // Mux select for start/end address assign sel_lo[i] = ((~ldst_dual_r | store_stbuf_reqvld_r) & (i == WrPtr[DEPTH_LOG2-1:0]) & ~store_coalesce_lo_r) | // lo allocated new entry store_matchvec_lo_r[i]; // lo coalesced in to this entry assign stbuf_addrin[i][pt.LSU_SB_BITS-1:0] = sel_lo[i] ? lsu_addr_r[pt.LSU_SB_BITS-1:0] : end_addr_r[pt.LSU_SB_BITS-1:0]; assign stbuf_byteenin[i][BYTE_WIDTH-1:0] = sel_lo[i] ? (stbuf_byteen[i][BYTE_WIDTH-1:0] | store_byteen_lo_r[BYTE_WIDTH-1:0]) : (stbuf_byteen[i][BYTE_WIDTH-1:0] | store_byteen_hi_r[BYTE_WIDTH-1:0]); assign stbuf_datain[i][7:0] = sel_lo[i] ? ((~stbuf_byteen[i][0] | store_byteen_lo_r[0]) ? store_datafn_lo_r[7:0] : stbuf_data[i][7:0]) : ((~stbuf_byteen[i][0] | store_byteen_hi_r[0]) ? store_datafn_hi_r[7:0] : stbuf_data[i][7:0]); assign stbuf_datain[i][15:8] = sel_lo[i] ? ((~stbuf_byteen[i][1] | store_byteen_lo_r[1]) ? store_datafn_lo_r[15:8] : stbuf_data[i][15:8]) : ((~stbuf_byteen[i][1] | store_byteen_hi_r[1]) ? store_datafn_hi_r[15:8] : stbuf_data[i][15:8]); assign stbuf_datain[i][23:16] = sel_lo[i] ? ((~stbuf_byteen[i][2] | store_byteen_lo_r[2]) ? store_datafn_lo_r[23:16] : stbuf_data[i][23:16]) : ((~stbuf_byteen[i][2] | store_byteen_hi_r[2]) ? store_datafn_hi_r[23:16] : stbuf_data[i][23:16]); assign stbuf_datain[i][31:24] = sel_lo[i] ? ((~stbuf_byteen[i][3] | store_byteen_lo_r[3]) ? store_datafn_lo_r[31:24] : stbuf_data[i][31:24]) : ((~stbuf_byteen[i][3] | store_byteen_hi_r[3]) ? store_datafn_hi_r[31:24] : stbuf_data[i][31:24]); rvdffsc #( .WIDTH(1) ) stbuf_vldff ( .din(1'b1), .dout(stbuf_vld[i]), .en(stbuf_wr_en[i]), .clear(stbuf_reset[i]), .clk(lsu_free_c2_clk), .* ); rvdffsc #( .WIDTH(1) ) stbuf_killff ( .din(1'b1), .dout(stbuf_dma_kill[i]), .en(stbuf_dma_kill_en[i]), .clear(stbuf_reset[i]), .clk(lsu_free_c2_clk), .* ); rvdffe #( .WIDTH(pt.LSU_SB_BITS) ) stbuf_addrff ( .din (stbuf_addrin[i][pt.LSU_SB_BITS-1:0]), .dout(stbuf_addr[i][pt.LSU_SB_BITS-1:0]), .en (stbuf_wr_en[i]), .* ); rvdffsc #( .WIDTH(BYTE_WIDTH) ) stbuf_byteenff ( .din(stbuf_byteenin[i][BYTE_WIDTH-1:0]), .dout(stbuf_byteen[i][BYTE_WIDTH-1:0]), .en(stbuf_wr_en[i]), .clear(stbuf_reset[i]), .clk(lsu_stbuf_c1_clk), .* ); rvdffe #( .WIDTH(DATA_WIDTH) ) stbuf_dataff ( .din (stbuf_datain[i][DATA_WIDTH-1:0]), .dout(stbuf_data[i][DATA_WIDTH-1:0]), .en (stbuf_wr_en[i]), .* ); end end else begin : Gen_dccm_disable assign stbuf_wr_en[DEPTH-1:0] = '0; assign stbuf_reset[DEPTH-1:0] = '0; assign stbuf_vld[DEPTH-1:0] = '0; assign stbuf_dma_kill[DEPTH-1:0] = '0; assign stbuf_addr[DEPTH-1:0] = '0; assign stbuf_byteen[DEPTH-1:0] = '0; assign stbuf_data[DEPTH-1:0] = '0; end // Store Buffer drain logic assign stbuf_reqvld_flushed_any = stbuf_vld[RdPtr] & stbuf_dma_kill[RdPtr]; assign stbuf_reqvld_any = stbuf_vld[RdPtr] & ~stbuf_dma_kill[RdPtr] & ~(|stbuf_dma_kill_en[DEPTH-1:0]); // Don't drain if some kill bit is being set this cycle assign stbuf_addr_any[pt.LSU_SB_BITS-1:0] = stbuf_addr[RdPtr][pt.LSU_SB_BITS-1:0]; assign stbuf_data_any[DATA_WIDTH-1:0] = stbuf_data[RdPtr][DATA_WIDTH-1:0]; // Update the RdPtr/WrPtr logic // Need to revert the WrPtr for flush cases. Also revert the pipe WrPtrs assign WrPtrEn = (ldst_stbuf_reqvld_r & ~dual_stbuf_write_r & ~(store_coalesce_hi_r | store_coalesce_lo_r)) | // writing 1 and did not coalesce (ldst_stbuf_reqvld_r & dual_stbuf_write_r & ~(store_coalesce_hi_r & store_coalesce_lo_r)); // writing 2 and atleast 1 did not coalesce assign NxtWrPtr[DEPTH_LOG2-1:0] = (ldst_stbuf_reqvld_r & dual_stbuf_write_r & ~(store_coalesce_hi_r | store_coalesce_lo_r)) ? WrPtrPlus2[DEPTH_LOG2-1:0] : WrPtrPlus1[DEPTH_LOG2-1:0]; assign RdPtrEn = lsu_stbuf_commit_any | stbuf_reqvld_flushed_any; assign NxtRdPtr[DEPTH_LOG2-1:0] = RdPtrPlus1[DEPTH_LOG2-1:0]; always_comb begin stbuf_numvld_any[3:0] = '0; for (int i = 0; i < DEPTH; i++) begin stbuf_numvld_any[3:0] += {3'b0, stbuf_vld[i]}; end end // These go to store buffer to detect full assign isdccmst_m = lsu_pkt_m.valid & lsu_pkt_m.store & addr_in_dccm_m & ~lsu_pkt_m.dma; assign isdccmst_r = lsu_pkt_r.valid & lsu_pkt_r.store & addr_in_dccm_r & ~lsu_pkt_r.dma; assign stbuf_specvld_m[1:0] = {1'b0, isdccmst_m} << (isdccmst_m & ldst_dual_m); assign stbuf_specvld_r[1:0] = {1'b0, isdccmst_r} << (isdccmst_r & ldst_dual_r); assign stbuf_specvld_any[3:0] = stbuf_numvld_any[3:0] + {2'b0, stbuf_specvld_m[1:0]} + {2'b0, stbuf_specvld_r[1:0]}; assign lsu_stbuf_full_any = (~ldst_dual_d & dec_lsu_valid_raw_d) ? (stbuf_specvld_any[3:0] >= DEPTH) : (stbuf_specvld_any[3:0] >= (DEPTH-1)); assign lsu_stbuf_empty_any = (stbuf_numvld_any[3:0] == 4'b0); // Load forwarding logic from the store queue assign cmpaddr_hi_m[pt.LSU_SB_BITS-1:$clog2( BYTE_WIDTH )] = end_addr_m[pt.LSU_SB_BITS-1:$clog2( BYTE_WIDTH )]; assign cmpaddr_lo_m[pt.LSU_SB_BITS-1:$clog2( BYTE_WIDTH )] = lsu_addr_m[pt.LSU_SB_BITS-1:$clog2( BYTE_WIDTH )]; always_comb begin : GenLdFwd stbuf_fwdbyteen_hi_pre_m[BYTE_WIDTH-1:0] = '0; stbuf_fwdbyteen_lo_pre_m[BYTE_WIDTH-1:0] = '0; for (int i = 0; i < DEPTH; i++) begin stbuf_match_hi[i] = (stbuf_addr[i][pt.LSU_SB_BITS-1:$clog2(BYTE_WIDTH)] == cmpaddr_hi_m[pt.LSU_SB_BITS-1:$clog2(BYTE_WIDTH)]) & stbuf_vld[i] & ~stbuf_dma_kill[i] & addr_in_dccm_m; stbuf_match_lo[i] = (stbuf_addr[i][pt.LSU_SB_BITS-1:$clog2(BYTE_WIDTH)] == cmpaddr_lo_m[pt.LSU_SB_BITS-1:$clog2(BYTE_WIDTH)]) & stbuf_vld[i] & ~stbuf_dma_kill[i] & addr_in_dccm_m; // Kill the store buffer entry if there is a dma store since it already updated the dccm stbuf_dma_kill_en[i] = (stbuf_match_hi[i] | stbuf_match_lo[i]) & lsu_pkt_m.valid & lsu_pkt_m.dma & lsu_pkt_m.store; for (int j = 0; j < BYTE_WIDTH; j++) begin stbuf_fwdbyteenvec_hi[i][j] = stbuf_match_hi[i] & stbuf_byteen[i][j] & stbuf_vld[i]; stbuf_fwdbyteen_hi_pre_m[j] |= stbuf_fwdbyteenvec_hi[i][j]; stbuf_fwdbyteenvec_lo[i][j] = stbuf_match_lo[i] & stbuf_byteen[i][j] & stbuf_vld[i]; stbuf_fwdbyteen_lo_pre_m[j] |= stbuf_fwdbyteenvec_lo[i][j]; end end end // block: GenLdFwd always_comb begin : GenLdData stbuf_fwddata_hi_pre_m[31:0] = '0; stbuf_fwddata_lo_pre_m[31:0] = '0; for (int i = 0; i < DEPTH; i++) begin stbuf_fwddata_hi_pre_m[31:0] |= {32{stbuf_match_hi[i]}} & stbuf_data[i][31:0]; stbuf_fwddata_lo_pre_m[31:0] |= {32{stbuf_match_lo[i]}} & stbuf_data[i][31:0]; end end // block: GenLdData // Create Hi/Lo signals - needed for the pipe forwarding assign ldst_byteen_r[7:0] = ({8{lsu_pkt_r.by}} & 8'b0000_0001) | ({8{lsu_pkt_r.half}} & 8'b0000_0011) | ({8{lsu_pkt_r.word}} & 8'b0000_1111) | ({8{lsu_pkt_r.dword}} & 8'b1111_1111); assign ldst_byteen_ext_r[7:0] = ldst_byteen_r[7:0] << lsu_addr_r[1:0]; assign ldst_byteen_hi_r[3:0] = ldst_byteen_ext_r[7:4]; assign ldst_byteen_lo_r[3:0] = ldst_byteen_ext_r[3:0]; assign ld_addr_rhit_lo_lo = (lsu_addr_m[31:2] == lsu_addr_r[31:2]) & lsu_pkt_r.valid & lsu_pkt_r.store & ~lsu_pkt_r.dma; assign ld_addr_rhit_lo_hi = (end_addr_m[31:2] == lsu_addr_r[31:2]) & lsu_pkt_r.valid & lsu_pkt_r.store & ~lsu_pkt_r.dma; assign ld_addr_rhit_hi_lo = (lsu_addr_m[31:2] == end_addr_r[31:2]) & lsu_pkt_r.valid & lsu_pkt_r.store & ~lsu_pkt_r.dma & dual_stbuf_write_r; assign ld_addr_rhit_hi_hi = (end_addr_m[31:2] == end_addr_r[31:2]) & lsu_pkt_r.valid & lsu_pkt_r.store & ~lsu_pkt_r.dma & dual_stbuf_write_r; for (genvar i = 0; i < BYTE_WIDTH; i++) begin assign ld_byte_rhit_lo_lo[i] = ld_addr_rhit_lo_lo & ldst_byteen_lo_r[i]; assign ld_byte_rhit_lo_hi[i] = ld_addr_rhit_lo_hi & ldst_byteen_lo_r[i]; assign ld_byte_rhit_hi_lo[i] = ld_addr_rhit_hi_lo & ldst_byteen_hi_r[i]; assign ld_byte_rhit_hi_hi[i] = ld_addr_rhit_hi_hi & ldst_byteen_hi_r[i]; assign ld_byte_rhit_lo[i] = ld_byte_rhit_lo_lo[i] | ld_byte_rhit_hi_lo[i]; assign ld_byte_rhit_hi[i] = ld_byte_rhit_lo_hi[i] | ld_byte_rhit_hi_hi[i]; assign ld_fwddata_rpipe_lo[(8*i)+7:(8*i)] = ({8{ld_byte_rhit_lo_lo[i]}} & store_data_lo_r[(8*i)+7:(8*i)]) | ({8{ld_byte_rhit_hi_lo[i]}} & store_data_hi_r[(8*i)+7:(8*i)]); assign ld_fwddata_rpipe_hi[(8*i)+7:(8*i)] = ({8{ld_byte_rhit_lo_hi[i]}} & store_data_lo_r[(8*i)+7:(8*i)]) | ({8{ld_byte_rhit_hi_hi[i]}} & store_data_hi_r[(8*i)+7:(8*i)]); assign ld_byte_hit_lo[i] = ld_byte_rhit_lo_lo[i] | ld_byte_rhit_hi_lo[i]; assign ld_byte_hit_hi[i] = ld_byte_rhit_lo_hi[i] | ld_byte_rhit_hi_hi[i]; assign stbuf_fwdbyteen_hi_m[i] = ld_byte_hit_hi[i] | stbuf_fwdbyteen_hi_pre_m[i]; assign stbuf_fwdbyteen_lo_m[i] = ld_byte_hit_lo[i] | stbuf_fwdbyteen_lo_pre_m[i]; // // Pipe vs Store Queue priority assign stbuf_fwddata_lo_m[(8*i)+7:(8*i)] = ld_byte_rhit_lo[i] ? ld_fwddata_rpipe_lo[(8*i)+7:(8*i)] : stbuf_fwddata_lo_pre_m[(8*i)+7:(8*i)]; // // Pipe vs Store Queue priority assign stbuf_fwddata_hi_m[(8*i)+7:(8*i)] = ld_byte_rhit_hi[i] ? ld_fwddata_rpipe_hi[(8*i)+7:(8*i)] : stbuf_fwddata_hi_pre_m[(8*i)+7:(8*i)]; end // Flops rvdffs #( .WIDTH(DEPTH_LOG2) ) WrPtrff ( .din (NxtWrPtr[DEPTH_LOG2-1:0]), .dout(WrPtr[DEPTH_LOG2-1:0]), .en (WrPtrEn), .clk (lsu_stbuf_c1_clk), .* ); rvdffs #( .WIDTH(DEPTH_LOG2) ) RdPtrff ( .din (NxtRdPtr[DEPTH_LOG2-1:0]), .dout(RdPtr[DEPTH_LOG2-1:0]), .en (RdPtrEn), .clk (lsu_stbuf_c1_clk), .* ); endmodule