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https://github.com/YosysHQ/yosys
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add example memory test
This commit is contained in:
N. Engelhardt
Martin Povišer
parent
ede4eaeee2
commit
f9c8978128
7 changed files with 1213 additions and 1 deletions
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@ -37,4 +37,7 @@ $(eval $(call add_share_file,share/quicklogic/qlf_k6n10f,techlibs/quicklogic/qlf
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$(eval $(call add_share_file,share/quicklogic/qlf_k6n10f,techlibs/quicklogic/qlf_k6n10f/ffs_map.v))
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$(eval $(call add_share_file,share/quicklogic/qlf_k6n10f,techlibs/quicklogic/qlf_k6n10f/dsp_sim.v))
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$(eval $(call add_share_file,share/quicklogic/qlf_k6n10f,techlibs/quicklogic/qlf_k6n10f/dsp_map.v))
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$(eval $(call add_share_file,share/quicklogic/qlf_k6n10f,techlibs/quicklogic/qlf_k6n10f/dsp_final_map.v))
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$(eval $(call add_share_file,share/quicklogic/qlf_k6n10f,techlibs/quicklogic/qlf_k6n10f/dsp_final_map.v))
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$(eval $(call add_share_file,share/quicklogic/qlf_k6n10f,techlibs/quicklogic/qlf_k6n10f/TDP18K_FIFO.v))
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$(eval $(call add_share_file,share/quicklogic/qlf_k6n10f,techlibs/quicklogic/qlf_k6n10f/ufifo_ctl.v))
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$(eval $(call add_share_file,share/quicklogic/qlf_k6n10f,techlibs/quicklogic/qlf_k6n10f/sram1024x18_mem.v))
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344
techlibs/quicklogic/qlf_k6n10f/TDP18K_FIFO.v
Normal file
344
techlibs/quicklogic/qlf_k6n10f/TDP18K_FIFO.v
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@ -0,0 +1,344 @@
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// Copyright 2020-2022 F4PGA Authors
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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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//
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// SPDX-License-Identifier: Apache-2.0
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`default_nettype wire
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module TDP18K_FIFO (
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RMODE_A_i,
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RMODE_B_i,
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WMODE_A_i,
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WMODE_B_i,
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WEN_A_i,
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WEN_B_i,
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REN_A_i,
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REN_B_i,
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CLK_A_i,
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CLK_B_i,
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BE_A_i,
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BE_B_i,
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ADDR_A_i,
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ADDR_B_i,
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WDATA_A_i,
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WDATA_B_i,
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RDATA_A_o,
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RDATA_B_o,
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EMPTY_o,
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EPO_o,
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EWM_o,
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UNDERRUN_o,
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FULL_o,
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FMO_o,
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FWM_o,
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OVERRUN_o,
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FLUSH_ni,
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FMODE_i,
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);
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parameter SYNC_FIFO_i = 1'b0;
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parameter POWERDN_i = 1'b0;
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parameter SLEEP_i = 1'b0;
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parameter PROTECT_i = 1'b0;
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parameter UPAF_i = 11'b0;
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parameter UPAE_i = 11'b0;
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parameter [18*1024-1:0] INIT_i = 18431'bx;
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input wire [2:0] RMODE_A_i;
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input wire [2:0] RMODE_B_i;
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input wire [2:0] WMODE_A_i;
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input wire [2:0] WMODE_B_i;
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input wire WEN_A_i;
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input wire WEN_B_i;
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input wire REN_A_i;
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input wire REN_B_i;
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(* clkbuf_sink *)
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input wire CLK_A_i;
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(* clkbuf_sink *)
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input wire CLK_B_i;
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input wire [1:0] BE_A_i;
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input wire [1:0] BE_B_i;
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input wire [13:0] ADDR_A_i;
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input wire [13:0] ADDR_B_i;
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input wire [17:0] WDATA_A_i;
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input wire [17:0] WDATA_B_i;
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output reg [17:0] RDATA_A_o;
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output reg [17:0] RDATA_B_o;
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output wire EMPTY_o;
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output wire EPO_o;
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output wire EWM_o;
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output wire UNDERRUN_o;
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output wire FULL_o;
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output wire FMO_o;
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output wire FWM_o;
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output wire OVERRUN_o;
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input wire FLUSH_ni;
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input wire FMODE_i;
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reg [17:0] wmsk_a;
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reg [17:0] wmsk_b;
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wire [8:0] addr_a;
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wire [8:0] addr_b;
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reg [4:0] addr_a_d;
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reg [4:0] addr_b_d;
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wire [17:0] ram_rdata_a;
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wire [17:0] ram_rdata_b;
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reg [17:0] aligned_wdata_a;
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reg [17:0] aligned_wdata_b;
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wire ren_o;
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wire [10:0] ff_raddr;
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wire [10:0] ff_waddr;
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wire [13:0] ram_addr_a;
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wire [13:0] ram_addr_b;
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wire [3:0] ram_waddr_a;
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wire [3:0] ram_waddr_b;
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wire initn;
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wire smux_rclk;
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wire smux_wclk;
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wire real_fmode;
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wire [3:0] raw_fflags;
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reg [1:0] fifo_rmode;
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reg [1:0] fifo_wmode;
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wire smux_clk_a;
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wire smux_clk_b;
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wire ram_ren_a;
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wire ram_ren_b;
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wire ram_wen_a;
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wire ram_wen_b;
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wire cen_a;
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wire cen_b;
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wire cen_a_n;
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wire cen_b_n;
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wire ram_wen_a_n;
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wire ram_wen_b_n;
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localparam MODE_9 = 3'b001;
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always @(*) begin
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fifo_rmode = (RMODE_B_i == MODE_9 ? 2'b10 : 2'b01);
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fifo_wmode = (WMODE_A_i == MODE_9 ? 2'b10 : 2'b01);
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end
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assign smux_clk_a = CLK_A_i;
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assign smux_clk_b = CLK_B_i;
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assign real_fmode = FMODE_i;
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assign ram_ren_b = real_fmode ? ren_o : REN_B_i;
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assign ram_wen_a = FMODE_i ? ~FULL_o & WEN_A_i : WEN_A_i;
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assign ram_ren_a = FMODE_i ? 0 : REN_A_i;
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assign ram_wen_b = FMODE_i ? 1'b0 : WEN_B_i;
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assign cen_b = ram_ren_b | ram_wen_b;
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assign cen_a = ram_ren_a | ram_wen_a;
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assign ram_waddr_b = real_fmode ? {ff_raddr[0], 3'b000} : ADDR_B_i[3:0];
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assign ram_waddr_a = real_fmode ? {ff_waddr[0], 3'b000} : ADDR_A_i[3:0];
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assign ram_addr_b = real_fmode ? {ff_raddr[10:0], 3'h0} : {ADDR_B_i[13:4], addr_b_d[3:0]};
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assign ram_addr_a = real_fmode ? {ff_waddr[10:0], 3'h0} : {ADDR_A_i[13:4], addr_a_d[3:0]};
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always @(posedge CLK_A_i) addr_a_d[3:0] <= ADDR_A_i[3:0];
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always @(posedge CLK_B_i) addr_b_d[3:0] <= ADDR_B_i[3:0];
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assign cen_a_n = ~cen_a;
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assign ram_wen_a_n = ~ram_wen_a;
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assign cen_b_n = ~cen_b;
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assign ram_wen_b_n = ~ram_wen_b;
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sram1024x18 #(
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.init(INIT_i)
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) uram(
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.clk_a(smux_clk_a),
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.cen_a(cen_a_n),
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.wen_a(ram_wen_a_n),
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.addr_a(ram_addr_a[13:4]),
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.wmsk_a(wmsk_a),
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.wdata_a(aligned_wdata_a),
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.rdata_a(ram_rdata_a),
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.clk_b(smux_clk_b),
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.cen_b(cen_b_n),
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.wen_b(ram_wen_b_n),
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.addr_b(ram_addr_b[13:4]),
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.wmsk_b(wmsk_b),
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.wdata_b(aligned_wdata_b),
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.rdata_b(ram_rdata_b)
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);
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fifo_ctl #(
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.ADDR_WIDTH(11),
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.FIFO_WIDTH(2),
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.DEPTH(6)
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) fifo_ctl(
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.rclk(smux_clk_b),
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.rst_R_n(FLUSH_ni),
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.wclk(smux_clk_a),
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.rst_W_n(FLUSH_ni),
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.ren(REN_B_i),
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.wen(ram_wen_a),
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.sync(SYNC_FIFO_i),
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.rmode(fifo_rmode),
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.wmode(fifo_wmode),
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.ren_o(ren_o),
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.fflags({FULL_o, FMO_o, FWM_o, OVERRUN_o, EMPTY_o, EPO_o, EWM_o, UNDERRUN_o}),
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.raddr(ff_raddr),
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.waddr(ff_waddr),
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.upaf(UPAF_i),
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.upae(UPAE_i)
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);
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localparam MODE_1 = 3'b101;
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localparam MODE_18 = 3'b010;
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localparam MODE_2 = 3'b110;
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localparam MODE_4 = 3'b100;
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always @(*) begin : WDATA_MODE_SEL
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if (ram_wen_a == 1) begin
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case (WMODE_A_i)
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MODE_18: begin
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aligned_wdata_a = WDATA_A_i;
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{wmsk_a[17], wmsk_a[15:8]} = (FMODE_i ? 9'h000 : (BE_A_i[1] ? 9'h000 : 9'h1ff));
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{wmsk_a[16], wmsk_a[7:0]} = (FMODE_i ? 9'h000 : (BE_A_i[0] ? 9'h000 : 9'h1ff));
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end
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MODE_9: begin
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aligned_wdata_a = {{2 {WDATA_A_i[16]}}, {2 {WDATA_A_i[7:0]}}};
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{wmsk_a[17], wmsk_a[15:8]} = (ram_waddr_a[3] ? 9'h000 : 9'h1ff);
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{wmsk_a[16], wmsk_a[7:0]} = (ram_waddr_a[3] ? 9'h1ff : 9'h000);
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end
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MODE_4: begin
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aligned_wdata_a = {2'b00, {4 {WDATA_A_i[3:0]}}};
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wmsk_a[17:16] = 2'b00;
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wmsk_a[15:12] = (ram_waddr_a[3:2] == 2'b11 ? 4'h0 : 4'hf);
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wmsk_a[11:8] = (ram_waddr_a[3:2] == 2'b10 ? 4'h0 : 4'hf);
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wmsk_a[7:4] = (ram_waddr_a[3:2] == 2'b01 ? 4'h0 : 4'hf);
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wmsk_a[3:0] = (ram_waddr_a[3:2] == 2'b00 ? 4'h0 : 4'hf);
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end
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MODE_2: begin
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aligned_wdata_a = {2'b00, {8 {WDATA_A_i[1:0]}}};
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wmsk_a[17:16] = 2'b00;
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wmsk_a[15:14] = (ram_waddr_a[3:1] == 3'b111 ? 2'h0 : 2'h3);
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wmsk_a[13:12] = (ram_waddr_a[3:1] == 3'b110 ? 2'h0 : 2'h3);
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wmsk_a[11:10] = (ram_waddr_a[3:1] == 3'b101 ? 2'h0 : 2'h3);
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wmsk_a[9:8] = (ram_waddr_a[3:1] == 3'b100 ? 2'h0 : 2'h3);
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wmsk_a[7:6] = (ram_waddr_a[3:1] == 3'b011 ? 2'h0 : 2'h3);
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wmsk_a[5:4] = (ram_waddr_a[3:1] == 3'b010 ? 2'h0 : 2'h3);
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wmsk_a[3:2] = (ram_waddr_a[3:1] == 3'b001 ? 2'h0 : 2'h3);
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wmsk_a[1:0] = (ram_waddr_a[3:1] == 3'b000 ? 2'h0 : 2'h3);
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end
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MODE_1: begin
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aligned_wdata_a = {2'b00, {16 {WDATA_A_i[0]}}};
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wmsk_a = 18'h0ffff;
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wmsk_a[{1'b0, ram_waddr_a[3:0]}] = 0;
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end
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default: wmsk_a = 18'h3ffff;
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endcase
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end
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else begin
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aligned_wdata_a = 18'h00000;
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wmsk_a = 18'h3ffff;
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end
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if (ram_wen_b == 1)
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case (WMODE_B_i)
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MODE_18: begin
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aligned_wdata_b = WDATA_B_i;
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{wmsk_b[17], wmsk_b[15:8]} = (BE_B_i[1] ? 9'h000 : 9'h1ff);
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{wmsk_b[16], wmsk_b[7:0]} = (BE_B_i[0] ? 9'h000 : 9'h1ff);
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end
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MODE_9: begin
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aligned_wdata_b = {{2 {WDATA_B_i[16]}}, {2 {WDATA_B_i[7:0]}}};
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{wmsk_b[17], wmsk_b[15:8]} = (ram_waddr_b[3] ? 9'h000 : 9'h1ff);
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{wmsk_b[16], wmsk_b[7:0]} = (ram_waddr_b[3] ? 9'h1ff : 9'h000);
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end
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MODE_4: begin
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aligned_wdata_b = {2'b00, {4 {WDATA_B_i[3:0]}}};
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wmsk_b[17:16] = 2'b00;
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wmsk_b[15:12] = (ram_waddr_b[3:2] == 2'b11 ? 4'h0 : 4'hf);
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wmsk_b[11:8] = (ram_waddr_b[3:2] == 2'b10 ? 4'h0 : 4'hf);
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wmsk_b[7:4] = (ram_waddr_b[3:2] == 2'b01 ? 4'h0 : 4'hf);
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wmsk_b[3:0] = (ram_waddr_b[3:2] == 2'b00 ? 4'h0 : 4'hf);
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end
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MODE_2: begin
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aligned_wdata_b = {2'b00, {8 {WDATA_B_i[1:0]}}};
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wmsk_b[17:16] = 2'b00;
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wmsk_b[15:14] = (ram_waddr_b[3:1] == 3'b111 ? 2'h0 : 2'h3);
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wmsk_b[13:12] = (ram_waddr_b[3:1] == 3'b110 ? 2'h0 : 2'h3);
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wmsk_b[11:10] = (ram_waddr_b[3:1] == 3'b101 ? 2'h0 : 2'h3);
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wmsk_b[9:8] = (ram_waddr_b[3:1] == 3'b100 ? 2'h0 : 2'h3);
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wmsk_b[7:6] = (ram_waddr_b[3:1] == 3'b011 ? 2'h0 : 2'h3);
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wmsk_b[5:4] = (ram_waddr_b[3:1] == 3'b010 ? 2'h0 : 2'h3);
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wmsk_b[3:2] = (ram_waddr_b[3:1] == 3'b001 ? 2'h0 : 2'h3);
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wmsk_b[1:0] = (ram_waddr_b[3:1] == 3'b000 ? 2'h0 : 2'h3);
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end
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MODE_1: begin
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aligned_wdata_b = {2'b00, {16 {WDATA_B_i[0]}}};
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wmsk_b = 18'h0ffff;
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wmsk_b[{1'b0, ram_waddr_b[3:0]}] = 0;
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end
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default: wmsk_b = 18'h3ffff;
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endcase
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else begin
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aligned_wdata_b = 18'b000000000000000000;
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wmsk_b = 18'h3ffff;
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end
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end
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always @(*) begin : RDATA_A_MODE_SEL
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case (RMODE_A_i)
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default: RDATA_A_o = 18'h00000;
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MODE_18: RDATA_A_o = ram_rdata_a;
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MODE_9: begin
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{RDATA_A_o[17], RDATA_A_o[15:8]} = 9'h000;
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{RDATA_A_o[16], RDATA_A_o[7:0]} = (ram_addr_a[3] ? {ram_rdata_a[17], ram_rdata_a[15:8]} : {ram_rdata_a[16], ram_rdata_a[7:0]});
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end
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MODE_4: begin
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RDATA_A_o[17:4] = 14'h0000;
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case (ram_addr_a[3:2])
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3: RDATA_A_o[3:0] = ram_rdata_a[15:12];
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2: RDATA_A_o[3:0] = ram_rdata_a[11:8];
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1: RDATA_A_o[3:0] = ram_rdata_a[7:4];
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0: RDATA_A_o[3:0] = ram_rdata_a[3:0];
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endcase
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end
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MODE_2: begin
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RDATA_A_o[17:2] = 16'h0000;
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case (ram_addr_a[3:1])
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7: RDATA_A_o[1:0] = ram_rdata_a[15:14];
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6: RDATA_A_o[1:0] = ram_rdata_a[13:12];
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5: RDATA_A_o[1:0] = ram_rdata_a[11:10];
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4: RDATA_A_o[1:0] = ram_rdata_a[9:8];
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3: RDATA_A_o[1:0] = ram_rdata_a[7:6];
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2: RDATA_A_o[1:0] = ram_rdata_a[5:4];
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1: RDATA_A_o[1:0] = ram_rdata_a[3:2];
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0: RDATA_A_o[1:0] = ram_rdata_a[1:0];
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endcase
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end
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MODE_1: begin
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RDATA_A_o[17:1] = 17'h00000;
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RDATA_A_o[0] = ram_rdata_a[ram_addr_a[3:0]];
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end
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endcase
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end
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always @(*)
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case (RMODE_B_i)
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default: RDATA_B_o = 18'h15566;
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MODE_18: RDATA_B_o = ram_rdata_b;
|
||||
MODE_9: begin
|
||||
{RDATA_B_o[17], RDATA_B_o[15:8]} = 9'b000000000;
|
||||
{RDATA_B_o[16], RDATA_B_o[7:0]} = (ram_addr_b[3] ? {ram_rdata_b[17], ram_rdata_b[15:8]} : {ram_rdata_b[16], ram_rdata_b[7:0]});
|
||||
end
|
||||
MODE_4:
|
||||
case (ram_addr_b[3:2])
|
||||
3: RDATA_B_o[3:0] = ram_rdata_b[15:12];
|
||||
2: RDATA_B_o[3:0] = ram_rdata_b[11:8];
|
||||
1: RDATA_B_o[3:0] = ram_rdata_b[7:4];
|
||||
0: RDATA_B_o[3:0] = ram_rdata_b[3:0];
|
||||
endcase
|
||||
MODE_2:
|
||||
case (ram_addr_b[3:1])
|
||||
7: RDATA_B_o[1:0] = ram_rdata_b[15:14];
|
||||
6: RDATA_B_o[1:0] = ram_rdata_b[13:12];
|
||||
5: RDATA_B_o[1:0] = ram_rdata_b[11:10];
|
||||
4: RDATA_B_o[1:0] = ram_rdata_b[9:8];
|
||||
3: RDATA_B_o[1:0] = ram_rdata_b[7:6];
|
||||
2: RDATA_B_o[1:0] = ram_rdata_b[5:4];
|
||||
1: RDATA_B_o[1:0] = ram_rdata_b[3:2];
|
||||
0: RDATA_B_o[1:0] = ram_rdata_b[1:0];
|
||||
endcase
|
||||
MODE_1: RDATA_B_o[0] = ram_rdata_b[{1'b0, ram_addr_b[3:0]}];
|
||||
endcase
|
||||
endmodule
|
||||
`default_nettype none
|
||||
64
techlibs/quicklogic/qlf_k6n10f/sram1024x18_mem.v
Normal file
64
techlibs/quicklogic/qlf_k6n10f/sram1024x18_mem.v
Normal file
|
|
@ -0,0 +1,64 @@
|
|||
`default_nettype none
|
||||
module sram1024x18 (
|
||||
clk_a,
|
||||
cen_a,
|
||||
wen_a,
|
||||
addr_a,
|
||||
wmsk_a,
|
||||
wdata_a,
|
||||
rdata_a,
|
||||
clk_b,
|
||||
cen_b,
|
||||
wen_b,
|
||||
addr_b,
|
||||
wmsk_b,
|
||||
wdata_b,
|
||||
rdata_b
|
||||
);
|
||||
parameter [1024*18-1:0] init = 18431'bx;
|
||||
(* clkbuf_sink *)
|
||||
input wire clk_a;
|
||||
input wire cen_a;
|
||||
input wire wen_a;
|
||||
input wire [9:0] addr_a;
|
||||
input wire [17:0] wmsk_a;
|
||||
input wire [17:0] wdata_a;
|
||||
output reg [17:0] rdata_a;
|
||||
(* clkbuf_sink *)
|
||||
input wire clk_b;
|
||||
input wire cen_b;
|
||||
input wire wen_b;
|
||||
input wire [9:0] addr_b;
|
||||
input wire [17:0] wmsk_b;
|
||||
input wire [17:0] wdata_b;
|
||||
output reg [17:0] rdata_b;
|
||||
reg [17:0] ram [1023:0];
|
||||
integer i;
|
||||
initial begin
|
||||
for (i = 0; i < 1024; i = i + 1) begin
|
||||
ram[i] = init[18*i +: 18];
|
||||
end
|
||||
end
|
||||
|
||||
always @(posedge clk_a) begin
|
||||
if (!cen_a) begin
|
||||
if (!wen_a)
|
||||
for (i = 0; i < 18; i++) begin
|
||||
if (!wmsk_a[i]) ram[addr_a][i] <= wdata_a[i];
|
||||
end
|
||||
rdata_a <= ram[addr_a];
|
||||
end
|
||||
end
|
||||
|
||||
always @(posedge clk_b) begin
|
||||
if (!cen_b) begin
|
||||
if (!wen_b)
|
||||
for (i = 0; i < 18; i++) begin
|
||||
if (!wmsk_b[i]) ram[addr_b][i] <= wdata_b[i];
|
||||
end
|
||||
rdata_b <= ram[addr_b];
|
||||
end
|
||||
end
|
||||
|
||||
endmodule
|
||||
|
||||
620
techlibs/quicklogic/qlf_k6n10f/ufifo_ctl.v
Normal file
620
techlibs/quicklogic/qlf_k6n10f/ufifo_ctl.v
Normal file
|
|
@ -0,0 +1,620 @@
|
|||
// Copyright 2020-2022 F4PGA Authors
|
||||
//
|
||||
// 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.
|
||||
//
|
||||
// SPDX-License-Identifier: Apache-2.0
|
||||
|
||||
`default_nettype wire
|
||||
module fifo_ctl (
|
||||
raddr,
|
||||
waddr,
|
||||
fflags,
|
||||
ren_o,
|
||||
sync,
|
||||
rmode,
|
||||
wmode,
|
||||
rclk,
|
||||
rst_R_n,
|
||||
wclk,
|
||||
rst_W_n,
|
||||
ren,
|
||||
wen,
|
||||
upaf,
|
||||
upae
|
||||
);
|
||||
parameter ADDR_WIDTH = 11;
|
||||
parameter FIFO_WIDTH = 3'd2;
|
||||
parameter DEPTH = 6;
|
||||
output wire [ADDR_WIDTH - 1:0] raddr;
|
||||
output wire [ADDR_WIDTH - 1:0] waddr;
|
||||
output wire [7:0] fflags;
|
||||
output wire ren_o;
|
||||
input wire sync;
|
||||
input wire [1:0] rmode;
|
||||
input wire [1:0] wmode;
|
||||
(* clkbuf_sink *)
|
||||
input wire rclk;
|
||||
input wire rst_R_n;
|
||||
(* clkbuf_sink *)
|
||||
input wire wclk;
|
||||
input wire rst_W_n;
|
||||
input wire ren;
|
||||
input wire wen;
|
||||
input wire [ADDR_WIDTH - 1:0] upaf;
|
||||
input wire [ADDR_WIDTH - 1:0] upae;
|
||||
localparam ADDR_PLUS_ONE = ADDR_WIDTH + 1;
|
||||
reg [ADDR_WIDTH:0] pushtopop1;
|
||||
reg [ADDR_WIDTH:0] pushtopop2;
|
||||
reg [ADDR_WIDTH:0] poptopush1;
|
||||
reg [ADDR_WIDTH:0] poptopush2;
|
||||
wire [ADDR_WIDTH:0] pushtopop0;
|
||||
wire [ADDR_WIDTH:0] poptopush0;
|
||||
wire [ADDR_WIDTH:0] smux_poptopush;
|
||||
wire [ADDR_WIDTH:0] smux_pushtopop;
|
||||
assign smux_poptopush = (sync ? poptopush0 : poptopush2);
|
||||
assign smux_pushtopop = (sync ? pushtopop0 : pushtopop2);
|
||||
always @(posedge rclk or negedge rst_R_n)
|
||||
if (~rst_R_n) begin
|
||||
pushtopop1 <= 'h0;
|
||||
pushtopop2 <= 'h0;
|
||||
end
|
||||
else begin
|
||||
pushtopop1 = pushtopop0;
|
||||
pushtopop2 = pushtopop1;
|
||||
end
|
||||
always @(posedge wclk or negedge rst_W_n)
|
||||
if (~rst_W_n) begin
|
||||
poptopush1 <= 'h0;
|
||||
poptopush2 <= 'h0;
|
||||
end
|
||||
else begin
|
||||
poptopush1 <= poptopush0;
|
||||
poptopush2 <= poptopush1;
|
||||
end
|
||||
fifo_push #(
|
||||
.ADDR_WIDTH(ADDR_WIDTH),
|
||||
.DEPTH(DEPTH)
|
||||
) u_fifo_push(
|
||||
.wclk(wclk),
|
||||
.wen(wen),
|
||||
.rst_n(rst_W_n),
|
||||
.rmode(rmode),
|
||||
.wmode(wmode),
|
||||
.gcout(pushtopop0),
|
||||
.gcin(smux_poptopush),
|
||||
.ff_waddr(waddr),
|
||||
.pushflags(fflags[7:4]),
|
||||
.upaf(upaf)
|
||||
);
|
||||
fifo_pop #(
|
||||
.ADDR_WIDTH(ADDR_WIDTH),
|
||||
.FIFO_WIDTH(FIFO_WIDTH),
|
||||
.DEPTH(DEPTH)
|
||||
) u_fifo_pop(
|
||||
.rclk(rclk),
|
||||
.ren_in(ren),
|
||||
.rst_n(rst_R_n),
|
||||
.rmode(rmode),
|
||||
.wmode(wmode),
|
||||
.ren_o(ren_o),
|
||||
.gcout(poptopush0),
|
||||
.gcin(smux_pushtopop),
|
||||
.out_raddr(raddr),
|
||||
.popflags(fflags[3:0]),
|
||||
.upae(upae)
|
||||
);
|
||||
endmodule
|
||||
module fifo_push (
|
||||
pushflags,
|
||||
gcout,
|
||||
ff_waddr,
|
||||
rst_n,
|
||||
wclk,
|
||||
wen,
|
||||
rmode,
|
||||
wmode,
|
||||
gcin,
|
||||
upaf
|
||||
);
|
||||
parameter ADDR_WIDTH = 11;
|
||||
parameter DEPTH = 6;
|
||||
output wire [3:0] pushflags;
|
||||
output wire [ADDR_WIDTH:0] gcout;
|
||||
output wire [ADDR_WIDTH - 1:0] ff_waddr;
|
||||
input rst_n;
|
||||
(* clkbuf_sink *)
|
||||
input wclk;
|
||||
input wen;
|
||||
input [1:0] rmode;
|
||||
input [1:0] wmode;
|
||||
input [ADDR_WIDTH:0] gcin;
|
||||
input [ADDR_WIDTH - 1:0] upaf;
|
||||
localparam ADDR_PLUS_ONE = ADDR_WIDTH + 1;
|
||||
reg full_next;
|
||||
reg full;
|
||||
reg paf_next;
|
||||
reg paf;
|
||||
reg fmo;
|
||||
reg fmo_next;
|
||||
reg overflow;
|
||||
reg p1;
|
||||
reg p2;
|
||||
reg f1;
|
||||
reg f2;
|
||||
reg q1;
|
||||
reg q2;
|
||||
reg [1:0] gmode;
|
||||
reg [ADDR_WIDTH:0] waddr;
|
||||
reg [ADDR_WIDTH:0] raddr;
|
||||
reg [ADDR_WIDTH:0] gcout_reg;
|
||||
reg [ADDR_WIDTH:0] gcout_next;
|
||||
reg [ADDR_WIDTH:0] raddr_next;
|
||||
reg [ADDR_WIDTH - 1:0] paf_thresh;
|
||||
wire overflow_next;
|
||||
wire [ADDR_WIDTH:0] waddr_next;
|
||||
wire [ADDR_WIDTH:0] gc8out_next;
|
||||
wire [ADDR_WIDTH - 1:0] gc16out_next;
|
||||
wire [ADDR_WIDTH - 2:0] gc32out_next;
|
||||
wire [ADDR_WIDTH:0] tmp;
|
||||
wire [ADDR_WIDTH:0] next_count;
|
||||
wire [ADDR_WIDTH:0] count;
|
||||
wire [ADDR_WIDTH:0] fbytes;
|
||||
genvar i;
|
||||
assign next_count = fbytes - (waddr_next >= raddr_next ? waddr_next - raddr_next : (~raddr_next + waddr_next) + 1);
|
||||
assign count = fbytes - (waddr >= raddr ? waddr - raddr : (~raddr + waddr) + 1);
|
||||
assign fbytes = 1 << (DEPTH + 5);
|
||||
always @(*) begin
|
||||
paf_thresh = wmode[1] ? upaf : (wmode[0] ? upaf << 1 : upaf << 2);
|
||||
end
|
||||
always @(*)
|
||||
case (wmode)
|
||||
2'h0, 2'h1, 2'h2: begin
|
||||
full_next = (wen ? f1 : f2);
|
||||
fmo_next = (wen ? p1 : p2);
|
||||
paf_next = (wen ? q1 : q2);
|
||||
end
|
||||
default: begin
|
||||
full_next = 1'b0;
|
||||
fmo_next = 1'b0;
|
||||
paf_next = 1'b0;
|
||||
end
|
||||
endcase
|
||||
always @(*) begin : PUSH_FULL_FLAGS
|
||||
f1 = 1'b0;
|
||||
f2 = 1'b0;
|
||||
p1 = 1'b0;
|
||||
p2 = 1'b0;
|
||||
q1 = next_count < {1'b0, paf_thresh};
|
||||
q2 = count < {1'b0, paf_thresh};
|
||||
case (wmode)
|
||||
2'h0:
|
||||
case (DEPTH)
|
||||
3'h6: begin
|
||||
f1 = {~waddr_next[11], waddr_next[10:2]} == raddr_next[11:2];
|
||||
f2 = {~waddr[11], waddr[10:2]} == raddr_next[11:2];
|
||||
p1 = ((waddr_next[10:2] + 1) & 9'h1ff) == raddr_next[10:2];
|
||||
p2 = ((waddr[10:2] + 1) & 9'h1ff) == raddr_next[10:2];
|
||||
end
|
||||
3'h5: begin
|
||||
f1 = {~waddr_next[10], waddr_next[9:2]} == raddr_next[10:2];
|
||||
f2 = {~waddr[10], waddr[9:2]} == raddr_next[10:2];
|
||||
p1 = ((waddr_next[9:2] + 1) & 8'hff) == raddr_next[9:2];
|
||||
p2 = ((waddr[9:2] + 1) & 8'hff) == raddr_next[9:2];
|
||||
end
|
||||
3'h4: begin
|
||||
f1 = {~waddr_next[9], waddr_next[8:2]} == raddr_next[9:2];
|
||||
f2 = {~waddr[9], waddr[8:2]} == raddr_next[9:2];
|
||||
p1 = ((waddr_next[8:2] + 1) & 7'h7f) == raddr_next[8:2];
|
||||
p2 = ((waddr[8:2] + 1) & 7'h7f) == raddr_next[8:2];
|
||||
end
|
||||
3'h3: begin
|
||||
f1 = {~waddr_next[8], waddr_next[7:2]} == raddr_next[8:2];
|
||||
f2 = {~waddr[8], waddr[7:2]} == raddr_next[8:2];
|
||||
p1 = ((waddr_next[7:2] + 1) & 6'h3f) == raddr_next[7:2];
|
||||
p2 = ((waddr[7:2] + 1) & 6'h3f) == raddr_next[7:2];
|
||||
end
|
||||
3'h2: begin
|
||||
f1 = {~waddr_next[7], waddr_next[6:2]} == raddr_next[7:2];
|
||||
f2 = {~waddr[7], waddr[6:2]} == raddr_next[7:2];
|
||||
p1 = ((waddr_next[6:2] + 1) & 5'h1f) == raddr_next[6:2];
|
||||
p2 = ((waddr[6:2] + 1) & 5'h1f) == raddr_next[6:2];
|
||||
end
|
||||
3'h1: begin
|
||||
f1 = {~waddr_next[6], waddr_next[5:2]} == raddr_next[6:2];
|
||||
f2 = {~waddr[6], waddr[5:2]} == raddr_next[6:2];
|
||||
p1 = ((waddr_next[5:2] + 1) & 4'hf) == raddr_next[5:2];
|
||||
p2 = ((waddr[5:2] + 1) & 4'hf) == raddr_next[5:2];
|
||||
end
|
||||
3'h0: begin
|
||||
f1 = {~waddr_next[5], waddr_next[4:2]} == raddr_next[5:2];
|
||||
f2 = {~waddr[5], waddr[4:2]} == raddr_next[5:2];
|
||||
p1 = ((waddr_next[4:2] + 1) & 3'h7) == raddr_next[4:2];
|
||||
p2 = ((waddr[4:2] + 1) & 3'h7) == raddr_next[4:2];
|
||||
end
|
||||
3'h7: begin
|
||||
f1 = {~waddr_next[ADDR_WIDTH], waddr_next[ADDR_WIDTH - 1:2]} == raddr_next[ADDR_WIDTH:2];
|
||||
f2 = {~waddr[ADDR_WIDTH], waddr[ADDR_WIDTH - 1:2]} == raddr_next[ADDR_WIDTH:2];
|
||||
p1 = ((waddr_next[ADDR_WIDTH - 1:2] + 1) & {ADDR_WIDTH - 2 {1'b1}}) == raddr_next[ADDR_WIDTH - 1:2];
|
||||
p2 = ((waddr[ADDR_WIDTH - 1:2] + 1) & {ADDR_WIDTH - 2 {1'b1}}) == raddr_next[ADDR_WIDTH - 1:2];
|
||||
end
|
||||
endcase
|
||||
2'h1:
|
||||
case (DEPTH)
|
||||
3'h6: begin
|
||||
f1 = {~waddr_next[11], waddr_next[10:1]} == raddr_next[11:1];
|
||||
f2 = {~waddr[11], waddr[10:1]} == raddr_next[11:1];
|
||||
p1 = ((waddr_next[10:1] + 1) & 10'h3ff) == raddr_next[10:1];
|
||||
p2 = ((waddr[10:1] + 1) & 10'h3ff) == raddr_next[10:1];
|
||||
end
|
||||
3'h5: begin
|
||||
f1 = {~waddr_next[10], waddr_next[9:1]} == raddr_next[10:1];
|
||||
f2 = {~waddr[10], waddr[9:1]} == raddr_next[10:1];
|
||||
p1 = ((waddr_next[9:1] + 1) & 9'h1ff) == raddr_next[9:1];
|
||||
p2 = ((waddr[9:1] + 1) & 9'h1ff) == raddr_next[9:1];
|
||||
end
|
||||
3'h4: begin
|
||||
f1 = {~waddr_next[9], waddr_next[8:1]} == raddr_next[9:1];
|
||||
f2 = {~waddr[9], waddr[8:1]} == raddr_next[9:1];
|
||||
p1 = ((waddr_next[8:1] + 1) & 8'hff) == raddr_next[8:1];
|
||||
p2 = ((waddr[8:1] + 1) & 8'hff) == raddr_next[8:1];
|
||||
end
|
||||
3'h3: begin
|
||||
f1 = {~waddr_next[8], waddr_next[7:1]} == raddr_next[8:1];
|
||||
f2 = {~waddr[8], waddr[7:1]} == raddr_next[8:1];
|
||||
p1 = ((waddr_next[7:1] + 1) & 7'h7f) == raddr_next[7:1];
|
||||
p2 = ((waddr[7:1] + 1) & 7'h7f) == raddr_next[7:1];
|
||||
end
|
||||
3'h2: begin
|
||||
f1 = {~waddr_next[7], waddr_next[6:1]} == raddr_next[7:1];
|
||||
f2 = {~waddr[7], waddr[6:1]} == raddr_next[7:1];
|
||||
p1 = ((waddr_next[6:1] + 1) & 6'h3f) == raddr_next[6:1];
|
||||
p2 = ((waddr[6:1] + 1) & 6'h3f) == raddr_next[6:1];
|
||||
end
|
||||
3'h1: begin
|
||||
f1 = {~waddr_next[6], waddr_next[5:1]} == raddr_next[6:1];
|
||||
f2 = {~waddr[6], waddr[5:1]} == raddr_next[6:1];
|
||||
p1 = ((waddr_next[5:1] + 1) & 5'h1f) == raddr_next[5:1];
|
||||
p2 = ((waddr[5:1] + 1) & 5'h1f) == raddr_next[5:1];
|
||||
end
|
||||
3'h0: begin
|
||||
f1 = {~waddr_next[5], waddr_next[4:1]} == raddr_next[5:1];
|
||||
f2 = {~waddr[5], waddr[4:1]} == raddr_next[5:1];
|
||||
p1 = ((waddr_next[4:1] + 1) & 4'hf) == raddr_next[4:1];
|
||||
p2 = ((waddr[4:1] + 1) & 4'hf) == raddr_next[4:1];
|
||||
end
|
||||
3'h7: begin
|
||||
f1 = {~waddr_next[ADDR_WIDTH], waddr_next[ADDR_WIDTH - 1:1]} == raddr_next[ADDR_WIDTH:1];
|
||||
f2 = {~waddr[ADDR_WIDTH], waddr[ADDR_WIDTH - 1:1]} == raddr_next[ADDR_WIDTH:1];
|
||||
p1 = ((waddr_next[ADDR_WIDTH - 1:1] + 1) & {ADDR_WIDTH - 1 {1'b1}}) == raddr_next[ADDR_WIDTH - 1:1];
|
||||
p2 = ((waddr[ADDR_WIDTH - 1:1] + 1) & {ADDR_WIDTH - 1 {1'b1}}) == raddr_next[ADDR_WIDTH - 1:1];
|
||||
end
|
||||
endcase
|
||||
2'h2:
|
||||
case (DEPTH)
|
||||
3'h6: begin
|
||||
f1 = {~waddr_next[11], waddr_next[10:0]} == raddr_next[11:0];
|
||||
f2 = {~waddr[11], waddr[10:0]} == raddr_next[11:0];
|
||||
p1 = ((waddr_next[10:0] + 1) & 11'h7ff) == raddr_next[10:0];
|
||||
p2 = ((waddr[10:0] + 1) & 11'h7ff) == raddr_next[10:0];
|
||||
end
|
||||
3'h5: begin
|
||||
f1 = {~waddr_next[10], waddr_next[9:0]} == raddr_next[10:0];
|
||||
f2 = {~waddr[10], waddr[9:0]} == raddr_next[10:0];
|
||||
p1 = ((waddr_next[9:0] + 1) & 10'h3ff) == raddr_next[9:0];
|
||||
p2 = ((waddr[9:0] + 1) & 10'h3ff) == raddr_next[9:0];
|
||||
end
|
||||
3'h4: begin
|
||||
f1 = {~waddr_next[9], waddr_next[8:0]} == raddr_next[9:0];
|
||||
f2 = {~waddr[9], waddr[8:0]} == raddr_next[9:0];
|
||||
p1 = ((waddr_next[8:0] + 1) & 9'h1ff) == raddr_next[8:0];
|
||||
p2 = ((waddr[8:0] + 1) & 9'h1ff) == raddr_next[8:0];
|
||||
end
|
||||
3'h3: begin
|
||||
f1 = {~waddr_next[8], waddr_next[7:0]} == raddr_next[8:0];
|
||||
f2 = {~waddr[8], waddr[7:0]} == raddr_next[8:0];
|
||||
p1 = ((waddr_next[7:0] + 1) & 8'hff) == raddr_next[7:0];
|
||||
p2 = ((waddr[7:0] + 1) & 8'hff) == raddr_next[7:0];
|
||||
end
|
||||
3'h2: begin
|
||||
f1 = {~waddr_next[7], waddr_next[6:0]} == raddr_next[7:0];
|
||||
f2 = {~waddr[7], waddr[6:0]} == raddr_next[7:0];
|
||||
p1 = ((waddr_next[6:0] + 1) & 7'h7f) == raddr_next[6:0];
|
||||
p2 = ((waddr[6:0] + 1) & 7'h7f) == raddr_next[6:0];
|
||||
end
|
||||
3'h1: begin
|
||||
f1 = {~waddr_next[6], waddr_next[5:0]} == raddr_next[6:0];
|
||||
f2 = {~waddr[6], waddr[5:0]} == raddr_next[6:0];
|
||||
p1 = ((waddr_next[5:0] + 1) & 6'h3f) == raddr_next[5:0];
|
||||
p2 = ((waddr[5:0] + 1) & 6'h3f) == raddr_next[5:0];
|
||||
end
|
||||
3'h0: begin
|
||||
f1 = {~waddr_next[5], waddr_next[4:0]} == raddr_next[5:0];
|
||||
f2 = {~waddr[5], waddr[4:0]} == raddr_next[5:0];
|
||||
p1 = ((waddr_next[4:0] + 1) & 5'h1f) == raddr_next[4:0];
|
||||
p2 = ((waddr[4:0] + 1) & 5'h1f) == raddr_next[4:0];
|
||||
end
|
||||
3'h7: begin
|
||||
f1 = {~waddr_next[ADDR_WIDTH], waddr_next[ADDR_WIDTH - 1:0]} == raddr_next[ADDR_WIDTH:0];
|
||||
f2 = {~waddr[ADDR_WIDTH], waddr[ADDR_WIDTH - 1:0]} == raddr_next[ADDR_WIDTH:0];
|
||||
p1 = ((waddr_next[ADDR_WIDTH - 1:0] + 1) & {ADDR_WIDTH {1'b1}}) == raddr_next[ADDR_WIDTH - 1:0];
|
||||
p2 = ((waddr[ADDR_WIDTH - 1:0] + 1) & {ADDR_WIDTH {1'b1}}) == raddr_next[ADDR_WIDTH - 1:0];
|
||||
end
|
||||
endcase
|
||||
2'h3: begin
|
||||
f1 = 1'b0;
|
||||
f2 = 1'b0;
|
||||
p1 = 1'b0;
|
||||
p2 = 1'b0;
|
||||
end
|
||||
endcase
|
||||
end
|
||||
always @(*)
|
||||
case (wmode)
|
||||
2'h0: gmode = 2'h0;
|
||||
2'h1: gmode = (rmode == 2'h0 ? 2'h0 : 2'h1);
|
||||
2'h2: gmode = (rmode == 2'h2 ? 2'h2 : rmode);
|
||||
2'h3: gmode = 2'h3;
|
||||
endcase
|
||||
assign gc8out_next = (waddr_next >> 1) ^ waddr_next;
|
||||
assign gc16out_next = (waddr_next >> 2) ^ (waddr_next >> 1);
|
||||
assign gc32out_next = (waddr_next >> 3) ^ (waddr_next >> 2);
|
||||
always @(*)
|
||||
if (wen)
|
||||
case (gmode)
|
||||
2'h2: gcout_next = gc8out_next;
|
||||
2'h1: gcout_next = {1'b0, gc16out_next};
|
||||
2'h0: gcout_next = {2'b00, gc32out_next};
|
||||
default: gcout_next = {ADDR_PLUS_ONE {1'b0}};
|
||||
endcase
|
||||
else
|
||||
gcout_next = {ADDR_PLUS_ONE {1'b0}};
|
||||
always @(posedge wclk or negedge rst_n)
|
||||
if (~rst_n) begin
|
||||
full <= 1'b0;
|
||||
fmo <= 1'b0;
|
||||
paf <= 1'b0;
|
||||
raddr <= {ADDR_PLUS_ONE {1'b0}};
|
||||
end
|
||||
else begin
|
||||
full <= full_next;
|
||||
fmo <= fmo_next;
|
||||
paf <= paf_next;
|
||||
case (gmode)
|
||||
0: raddr <= raddr_next & {{ADDR_WIDTH - 1 {1'b1}}, 2'b00};
|
||||
1: raddr <= raddr_next & {{ADDR_WIDTH {1'b1}}, 1'b0};
|
||||
2: raddr <= raddr_next & {ADDR_WIDTH + 1 {1'b1}};
|
||||
3: raddr <= 12'h000;
|
||||
endcase
|
||||
end
|
||||
assign overflow_next = full & wen;
|
||||
always @(posedge wclk or negedge rst_n)
|
||||
if (~rst_n)
|
||||
overflow <= 1'b0;
|
||||
else if (wen == 1'b1)
|
||||
overflow <= overflow_next;
|
||||
always @(posedge wclk or negedge rst_n)
|
||||
if (~rst_n) begin
|
||||
waddr <= {ADDR_WIDTH + 1 {1'b0}};
|
||||
gcout_reg <= {ADDR_WIDTH + 1 {1'b0}};
|
||||
end
|
||||
else if (wen == 1'b1) begin
|
||||
waddr <= waddr_next;
|
||||
gcout_reg <= gcout_next;
|
||||
end
|
||||
assign gcout = gcout_reg;
|
||||
generate
|
||||
for (i = 0; i < (ADDR_WIDTH + 1); i = i + 1) begin : genblk1
|
||||
assign tmp[i] = ^(gcin >> i);
|
||||
end
|
||||
endgenerate
|
||||
always @(*)
|
||||
case (gmode)
|
||||
2'h0: raddr_next = {tmp[ADDR_WIDTH - 2:0], 2'b00} & {{ADDR_WIDTH - 1 {1'b1}}, 2'b00};
|
||||
2'h1: raddr_next = {tmp[ADDR_WIDTH - 1:0], 1'b0} & {{ADDR_WIDTH {1'b1}}, 1'b0};
|
||||
2'h2: raddr_next = {tmp[ADDR_WIDTH:0]} & {ADDR_WIDTH + 1 {1'b1}};
|
||||
default: raddr_next = {ADDR_WIDTH + 1 {1'b0}};
|
||||
endcase
|
||||
assign ff_waddr = waddr[ADDR_WIDTH - 1:0];
|
||||
assign pushflags = {full, fmo, paf, overflow};
|
||||
assign waddr_next = waddr + (wmode == 2'h0 ? 'h4 : (wmode == 2'h1 ? 'h2 : 'h1));
|
||||
endmodule
|
||||
module fifo_pop (
|
||||
ren_o,
|
||||
popflags,
|
||||
out_raddr,
|
||||
gcout,
|
||||
rst_n,
|
||||
rclk,
|
||||
ren_in,
|
||||
rmode,
|
||||
wmode,
|
||||
gcin,
|
||||
upae
|
||||
);
|
||||
parameter ADDR_WIDTH = 11;
|
||||
parameter FIFO_WIDTH = 3'd2;
|
||||
parameter DEPTH = 6;
|
||||
output wire ren_o;
|
||||
output wire [3:0] popflags;
|
||||
output reg [ADDR_WIDTH - 1:0] out_raddr;
|
||||
output wire [ADDR_WIDTH:0] gcout;
|
||||
input rst_n;
|
||||
(* clkbuf_sink *)
|
||||
input rclk;
|
||||
input ren_in;
|
||||
input [1:0] rmode;
|
||||
input [1:0] wmode;
|
||||
input [ADDR_WIDTH:0] gcin;
|
||||
input [ADDR_WIDTH - 1:0] upae;
|
||||
localparam ADDR_PLUS_ONE = ADDR_WIDTH + 1;
|
||||
reg empty;
|
||||
reg epo;
|
||||
reg pae;
|
||||
reg underflow;
|
||||
reg e1;
|
||||
reg e2;
|
||||
reg o1;
|
||||
reg o2;
|
||||
reg q1;
|
||||
reg q2;
|
||||
reg [1:0] bwl_sel;
|
||||
reg [1:0] gmode;
|
||||
reg [ADDR_WIDTH - 1:0] ff_raddr;
|
||||
reg [ADDR_WIDTH:0] waddr;
|
||||
reg [ADDR_WIDTH:0] raddr;
|
||||
reg [ADDR_WIDTH:0] gcout_reg;
|
||||
reg [ADDR_WIDTH:0] gcout_next;
|
||||
reg [ADDR_WIDTH:0] waddr_next;
|
||||
reg [ADDR_WIDTH - 1:0] pae_thresh;
|
||||
wire ren_out;
|
||||
wire empty_next;
|
||||
wire pae_next;
|
||||
wire epo_next;
|
||||
wire [ADDR_WIDTH - 2:0] gc32out_next;
|
||||
wire [ADDR_WIDTH - 1:0] gc16out_next;
|
||||
wire [ADDR_WIDTH:0] gc8out_next;
|
||||
wire [ADDR_WIDTH:0] raddr_next;
|
||||
wire [ADDR_WIDTH - 1:0] ff_raddr_next;
|
||||
wire [ADDR_WIDTH:0] tmp;
|
||||
wire [ADDR_PLUS_ONE:0] next_count;
|
||||
wire [ADDR_PLUS_ONE:0] count;
|
||||
wire [ADDR_PLUS_ONE:0] fbytes;
|
||||
genvar i;
|
||||
assign next_count = waddr - raddr_next;
|
||||
assign count = waddr - raddr;
|
||||
assign fbytes = 1 << (DEPTH + 5);
|
||||
always @(*) pae_thresh = rmode[1] ? upae : (rmode[0] ? upae << 1 : upae << 2);
|
||||
assign ren_out = (empty ? 1'b1 : ren_in);
|
||||
always @(*)
|
||||
case (rmode)
|
||||
2'h0: gmode = 2'h0;
|
||||
2'h1: gmode = (wmode == 2'h0 ? 2'h0 : 2'h1);
|
||||
2'h2: gmode = (wmode == 2'h2 ? 2'h2 : wmode);
|
||||
2'h3: gmode = 2'h3;
|
||||
endcase
|
||||
always @(*) begin
|
||||
e1 = 1'b0;
|
||||
e2 = 1'b0;
|
||||
o1 = 1'b0;
|
||||
o2 = 1'b0;
|
||||
q1 = next_count < {1'b0, pae_thresh};
|
||||
q2 = count < {1'b0, pae_thresh};
|
||||
case (rmode)
|
||||
2'h0: begin
|
||||
e1 = raddr_next[ADDR_WIDTH:2] == waddr_next[ADDR_WIDTH:2];
|
||||
e2 = raddr[ADDR_WIDTH:2] == waddr_next[ADDR_WIDTH:2];
|
||||
o1 = (raddr_next[ADDR_WIDTH:2] + 1) == waddr_next[ADDR_WIDTH:2];
|
||||
o2 = (raddr[ADDR_WIDTH:2] + 1) == waddr_next[ADDR_WIDTH:2];
|
||||
end
|
||||
2'h1: begin
|
||||
e1 = raddr_next[ADDR_WIDTH:1] == waddr_next[ADDR_WIDTH:1];
|
||||
e2 = raddr[ADDR_WIDTH:1] == waddr_next[ADDR_WIDTH:1];
|
||||
o1 = (raddr_next[ADDR_WIDTH:1] + 1) == waddr_next[ADDR_WIDTH:1];
|
||||
o2 = (raddr[ADDR_WIDTH:1] + 1) == waddr_next[ADDR_WIDTH:1];
|
||||
end
|
||||
2'h2: begin
|
||||
e1 = raddr_next[ADDR_WIDTH:0] == waddr_next[ADDR_WIDTH:0];
|
||||
e2 = raddr[ADDR_WIDTH:0] == waddr_next[ADDR_WIDTH:0];
|
||||
o1 = (raddr_next[ADDR_WIDTH:0] + 1) == waddr_next[ADDR_WIDTH:0];
|
||||
o2 = (raddr[ADDR_WIDTH:0] + 1) == waddr_next[11:0];
|
||||
end
|
||||
2'h3: begin
|
||||
e1 = 1'b0;
|
||||
e2 = 1'b0;
|
||||
o1 = 1'b0;
|
||||
o2 = 1'b0;
|
||||
end
|
||||
endcase
|
||||
end
|
||||
assign empty_next = (ren_in & !empty ? e1 : e2);
|
||||
assign epo_next = (ren_in & !empty ? o1 : o2);
|
||||
assign pae_next = (ren_in & !empty ? q1 : q2);
|
||||
always @(posedge rclk or negedge rst_n)
|
||||
if (~rst_n) begin
|
||||
empty <= 1'b1;
|
||||
pae <= 1'b1;
|
||||
epo <= 1'b0;
|
||||
end
|
||||
else begin
|
||||
empty <= empty_next;
|
||||
pae <= pae_next;
|
||||
epo <= epo_next;
|
||||
end
|
||||
assign gc8out_next = (raddr_next >> 1) ^ raddr_next;
|
||||
assign gc16out_next = (raddr_next >> 2) ^ (raddr_next >> 1);
|
||||
assign gc32out_next = (raddr_next >> 3) ^ (raddr_next >> 2);
|
||||
always @(*)
|
||||
if (ren_in)
|
||||
case (gmode)
|
||||
2'h2: gcout_next = gc8out_next;
|
||||
2'h1: gcout_next = {1'b0, gc16out_next};
|
||||
2'h0: gcout_next = {2'b00, gc32out_next};
|
||||
default: gcout_next = 'h0;
|
||||
endcase
|
||||
else
|
||||
gcout_next = 'h0;
|
||||
always @(posedge rclk or negedge rst_n)
|
||||
if (~rst_n)
|
||||
waddr <= 12'h000;
|
||||
else
|
||||
waddr <= waddr_next;
|
||||
always @(posedge rclk or negedge rst_n)
|
||||
if (~rst_n) begin
|
||||
underflow <= 1'b0;
|
||||
bwl_sel <= 2'h0;
|
||||
gcout_reg <= 12'h000;
|
||||
end
|
||||
else if (ren_in) begin
|
||||
underflow <= empty;
|
||||
if (!empty) begin
|
||||
bwl_sel <= raddr_next[1:0];
|
||||
gcout_reg <= gcout_next;
|
||||
end
|
||||
end
|
||||
generate
|
||||
for (i = 0; i < (ADDR_WIDTH + 1); i = i + 1) begin : genblk1
|
||||
assign tmp[i] = ^(gcin >> i);
|
||||
end
|
||||
endgenerate
|
||||
always @(*)
|
||||
case (gmode)
|
||||
2'h0: waddr_next = {tmp[ADDR_WIDTH - 2:0], 2'b00} & {{ADDR_WIDTH - 1 {1'b1}}, 2'b00};
|
||||
2'h1: waddr_next = {tmp[ADDR_WIDTH - 1:0], 1'b0} & {{ADDR_WIDTH {1'b1}}, 1'b0};
|
||||
2'h2: waddr_next = {tmp[ADDR_WIDTH:0]} & {ADDR_PLUS_ONE {1'b1}};
|
||||
default: waddr_next = {ADDR_PLUS_ONE {1'b0}};
|
||||
endcase
|
||||
assign ff_raddr_next = ff_raddr + (rmode == 2'h0 ? 'h4 : (rmode == 2'h1 ? 'h2 : 'h1));
|
||||
assign raddr_next = raddr + (rmode == 2'h0 ? 'h4 : (rmode == 2'h1 ? 'h2 : 'h1));
|
||||
always @(posedge rclk or negedge rst_n)
|
||||
if (~rst_n)
|
||||
ff_raddr <= 1'sb0;
|
||||
else if (empty & ~empty_next)
|
||||
ff_raddr <= raddr_next[ADDR_WIDTH - 1:0];
|
||||
else if ((ren_in & !empty) & ~empty_next)
|
||||
ff_raddr <= ff_raddr_next;
|
||||
always @(posedge rclk or negedge rst_n)
|
||||
if (~rst_n)
|
||||
raddr <= 12'h000;
|
||||
else if (ren_in & !empty)
|
||||
raddr <= raddr_next;
|
||||
always @(*)
|
||||
case (FIFO_WIDTH)
|
||||
3'h2: out_raddr = {ff_raddr[ADDR_WIDTH - 1:1], bwl_sel[0]};
|
||||
3'h4: out_raddr = {ff_raddr[ADDR_WIDTH - 1:2], bwl_sel};
|
||||
default: out_raddr = ff_raddr[ADDR_WIDTH - 1:0];
|
||||
endcase
|
||||
assign ren_o = ren_out;
|
||||
assign gcout = gcout_reg;
|
||||
assign popflags = {empty, epo, pae, underflow};
|
||||
endmodule
|
||||
`default_nettype none
|
||||
Loading…
Add table
Add a link
Reference in a new issue