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yosys/techlibs/gatemate/cells_sim.v
Joachim Strömbergson 90f50722ab
Change to blocking assignments in non-clocked process. 
Signed-off-by: Joachim Strömbergson <joachim@assured.se>
2025-04-23 17:13:37 +02:00

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64 KiB
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/*
* yosys -- Yosys Open SYnthesis Suite
*
* Copyright (C) 2021 Cologne Chip AG <support@colognechip.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
`timescale 1ps/1ps
module CC_IBUF #(
parameter PIN_NAME = "UNPLACED",
parameter V_IO = "UNDEFINED",
parameter [0:0] PULLUP = 1'bx,
parameter [0:0] PULLDOWN = 1'bx,
parameter [0:0] KEEPER = 1'bx,
parameter [0:0] SCHMITT_TRIGGER = 1'bx,
// IOSEL
parameter [3:0] DELAY_IBF = 1'bx,
parameter [0:0] FF_IBF = 1'bx
)(
(* iopad_external_pin *)
input I,
output Y
);
assign Y = I;
endmodule
module CC_OBUF #(
parameter PIN_NAME = "UNPLACED",
parameter V_IO = "UNDEFINED",
parameter DRIVE = "UNDEFINED",
parameter SLEW = "UNDEFINED",
// IOSEL
parameter [3:0] DELAY_OBF = 1'bx,
parameter [0:0] FF_OBF = 1'bx
)(
input A,
(* iopad_external_pin *)
output O
);
assign O = A;
endmodule
module CC_TOBUF #(
parameter PIN_NAME = "UNPLACED",
parameter V_IO = "UNDEFINED",
parameter DRIVE = "UNDEFINED",
parameter SLEW = "UNDEFINED",
parameter [0:0] PULLUP = 1'bx,
parameter [0:0] PULLDOWN = 1'bx,
parameter [0:0] KEEPER = 1'bx,
// IOSEL
parameter [3:0] DELAY_OBF = 1'bx,
parameter [0:0] FF_OBF = 1'bx
)(
input A, T,
(* iopad_external_pin *)
output O
);
assign O = T ? 1'bz : A;
endmodule
module CC_IOBUF #(
parameter PIN_NAME = "UNPLACED",
parameter V_IO = "UNDEFINED",
parameter DRIVE = "UNDEFINED",
parameter SLEW = "UNDEFINED",
parameter [0:0] PULLUP = 1'bx,
parameter [0:0] PULLDOWN = 1'bx,
parameter [0:0] KEEPER = 1'bx,
parameter [0:0] SCHMITT_TRIGGER = 1'bx,
// IOSEL
parameter [3:0] DELAY_IBF = 1'bx,
parameter [3:0] DELAY_OBF = 1'bx,
parameter [0:0] FF_IBF = 1'bx,
parameter [0:0] FF_OBF = 1'bx
)(
input A, T,
output Y,
(* iopad_external_pin *)
inout IO
);
assign IO = T ? 1'bz : A;
assign Y = IO;
endmodule
module CC_LVDS_IBUF #(
parameter PIN_NAME_P = "UNPLACED",
parameter PIN_NAME_N = "UNPLACED",
parameter V_IO = "UNDEFINED",
parameter [0:0] LVDS_RTERM = 1'bx,
// IOSEL
parameter [3:0] DELAY_IBF = 1'bx,
parameter [0:0] FF_IBF = 1'bx
)(
(* iopad_external_pin *)
input I_P, I_N,
output Y
);
assign Y = I_P;
endmodule
module CC_LVDS_OBUF #(
parameter PIN_NAME_P = "UNPLACED",
parameter PIN_NAME_N = "UNPLACED",
parameter V_IO = "UNDEFINED",
parameter [0:0] LVDS_BOOST = 1'bx,
// IOSEL
parameter [3:0] DELAY_OBF = 1'bx,
parameter [0:0] FF_OBF = 1'bx
)(
input A,
(* iopad_external_pin *)
output O_P, O_N
);
assign O_P = A;
assign O_N = ~A;
endmodule
module CC_LVDS_TOBUF #(
parameter PIN_NAME_P = "UNPLACED",
parameter PIN_NAME_N = "UNPLACED",
parameter V_IO = "UNDEFINED",
parameter [0:0] LVDS_BOOST = 1'bx,
// IOSEL
parameter [3:0] DELAY_OBF = 1'bx,
parameter [0:0] FF_OBF = 1'bx
)(
input A, T,
(* iopad_external_pin *)
output O_P, O_N
);
assign O_P = T ? 1'bz : A;
assign O_N = T ? 1'bz : ~A;
endmodule
module CC_LVDS_IOBUF #(
parameter PIN_NAME_P = "UNPLACED",
parameter PIN_NAME_N = "UNPLACED",
parameter V_IO = "UNDEFINED",
parameter [0:0] LVDS_RTERM = 1'bx,
parameter [0:0] LVDS_BOOST = 1'bx,
// IOSEL
parameter [3:0] DELAY_IBF = 1'bx,
parameter [3:0] DELAY_OBF = 1'bx,
parameter [0:0] FF_IBF = 1'bx,
parameter [0:0] FF_OBF = 1'bx
)(
input A, T,
(* iopad_external_pin *)
inout IO_P, IO_N,
output Y
);
assign IO_P = T ? 1'bz : A;
assign IO_N = T ? 1'bz : ~A;
assign Y = IO_P;
endmodule
module CC_IDDR #(
parameter [0:0] CLK_INV = 1'b0
)(
input D,
(* clkbuf_sink *)
input CLK,
output reg Q0, Q1
);
wire clk;
assign clk = (CLK_INV) ? ~CLK : CLK;
always @(posedge clk)
begin
Q0 <= D;
end
always @(negedge clk)
begin
Q1 <= D;
end
endmodule
module CC_ODDR #(
parameter [0:0] CLK_INV = 1'b0
)(
input D0,
input D1,
(* clkbuf_sink *)
input CLK,
(* clkbuf_sink *)
input DDR,
output Q
);
wire clk;
assign clk = (CLK_INV) ? ~CLK : CLK;
reg q0, q1;
assign Q = (DDR) ? q0 : q1;
always @(posedge clk)
begin
q0 <= D0;
end
always @(negedge clk)
begin
q1 <= D1;
end
endmodule
module CC_DFF #(
parameter [0:0] CLK_INV = 1'b0,
parameter [0:0] EN_INV = 1'b0,
parameter [0:0] SR_INV = 1'b0,
parameter [0:0] SR_VAL = 1'b0,
parameter [0:0] INIT = 1'bx
)(
input D,
(* clkbuf_sink *)
input CLK,
input EN,
input SR,
output reg Q
);
wire clk, en, sr;
assign clk = (CLK_INV) ? ~CLK : CLK;
assign en = (EN_INV) ? ~EN : EN;
assign sr = (SR_INV) ? ~SR : SR;
initial Q = INIT;
always @(posedge clk or posedge sr)
begin
if (sr) begin
Q <= SR_VAL;
end
else if (en) begin
Q <= D;
end
end
endmodule
module CC_DLT #(
parameter [0:0] G_INV = 1'b0,
parameter [0:0] SR_INV = 1'b0,
parameter [0:0] SR_VAL = 1'b0,
parameter [0:0] INIT = 1'bx
)(
input D,
input G,
input SR,
output reg Q
);
wire en, sr;
assign en = (G_INV) ? ~G : G;
assign sr = (SR_INV) ? ~SR : SR;
initial Q = INIT;
always @(*)
begin
if (sr) begin
Q = SR_VAL;
end
else if (en) begin
Q = D;
end
end
endmodule
module CC_LUT1 (
output O,
input I0
);
parameter [1:0] INIT = 0;
assign O = I0 ? INIT[1] : INIT[0];
endmodule
module CC_LUT2 (
output O,
input I0, I1
);
parameter [3:0] INIT = 0;
wire [1:0] s1 = I1 ? INIT[3:2] : INIT[1:0];
assign O = I0 ? s1[1] : s1[0];
endmodule
module CC_LUT3 (
output O,
input I0, I1, I2
);
parameter [7:0] INIT = 0;
wire [3:0] s2 = I2 ? INIT[7:4] : INIT[3:0];
wire [1:0] s1 = I1 ? s2[3:2] : s2[1:0];
assign O = I0 ? s1[1] : s1[0];
endmodule
module CC_LUT4 (
output O,
input I0, I1, I2, I3
);
parameter [15:0] INIT = 0;
wire [7:0] s3 = I3 ? INIT[15:8] : INIT[7:0];
wire [3:0] s2 = I2 ? s3[7:4] : s3[3:0];
wire [1:0] s1 = I1 ? s2[3:2] : s2[1:0];
assign O = I0 ? s1[1] : s1[0];
endmodule
module CC_MX2 (
input D0, D1,
input S0,
output Y
);
assign Y = S0 ? D1 : D0;
endmodule
module CC_MX4 (
input D0, D1, D2, D3,
input S0, S1,
output Y
);
assign Y = S1 ? (S0 ? D3 : D2) :
(S0 ? D1 : D0);
endmodule
module CC_MX8 (
input D0, D1, D2, D3,
input D4, D5, D6, D7,
input S0, S1, S2,
output Y
);
assign Y = S2 ? (S1 ? (S0 ? D7 : D6) :
(S0 ? D5 : D4)) :
(S1 ? (S0 ? D3 : D2) :
(S0 ? D1 : D0));
endmodule
module CC_ADDF (
input A, B, CI,
output CO, S
);
assign {CO, S} = A + B + CI;
endmodule
module CC_MULT #(
parameter A_WIDTH = 0,
parameter B_WIDTH = 0,
parameter P_WIDTH = 0
)(
input signed [A_WIDTH-1:0] A,
input signed [B_WIDTH-1:0] B,
output reg signed [P_WIDTH-1:0] P
);
always @(*)
begin
P = A * B;
end
endmodule
module CC_BUFG (
input I,
(* clkbuf_driver *)
output O
);
assign O = I;
endmodule
module CC_BRAM_20K (
output [19:0] A_DO,
output [19:0] B_DO,
output ECC_1B_ERR,
output ECC_2B_ERR,
(* clkbuf_sink *)
input A_CLK,
(* clkbuf_sink *)
input B_CLK,
input A_EN,
input B_EN,
input A_WE,
input B_WE,
input [15:0] A_ADDR,
input [15:0] B_ADDR,
input [19:0] A_DI,
input [19:0] B_DI,
input [19:0] A_BM,
input [19:0] B_BM
);
// Location format: D(0..N-1)(0..N-1)X(0..3)Y(0..7)Z(0..1) or UNPLACED
parameter LOC = "UNPLACED";
// Port Widths
parameter A_RD_WIDTH = 0;
parameter B_RD_WIDTH = 0;
parameter A_WR_WIDTH = 0;
parameter B_WR_WIDTH = 0;
// RAM and Write Modes
parameter RAM_MODE = "SDP";
parameter A_WR_MODE = "NO_CHANGE";
parameter B_WR_MODE = "NO_CHANGE";
// Inverting Control Pins
parameter A_CLK_INV = 1'b0;
parameter B_CLK_INV = 1'b0;
parameter A_EN_INV = 1'b0;
parameter B_EN_INV = 1'b0;
parameter A_WE_INV = 1'b0;
parameter B_WE_INV = 1'b0;
// Output Register
parameter A_DO_REG = 1'b0;
parameter B_DO_REG = 1'b0;
// Error Checking and Correction
parameter ECC_EN = 1'b0;
// RAM Contents
parameter INIT_00 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_01 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_02 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_03 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_04 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_05 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_06 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_07 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_08 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_09 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_0A = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_0B = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_0C = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_0D = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_0E = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_0F = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_10 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_11 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_12 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_13 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_14 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_15 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_16 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_17 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_18 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_19 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_1A = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_1B = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_1C = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_1D = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_1E = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_1F = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_20 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_21 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_22 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_23 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_24 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_25 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_26 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_27 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_28 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_29 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_2A = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_2B = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_2C = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_2D = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_2E = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_2F = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_30 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_31 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_32 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_33 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_34 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_35 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_36 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_37 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_38 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_39 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_3A = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_3B = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_3C = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_3D = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_3E = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_3F = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
localparam WIDTH_MODE_A = (A_RD_WIDTH > A_WR_WIDTH) ? A_RD_WIDTH : A_WR_WIDTH;
localparam WIDTH_MODE_B = (B_RD_WIDTH > B_WR_WIDTH) ? B_RD_WIDTH : B_WR_WIDTH;
integer i, k;
// 512 x 40 bit
reg [20479:0] memory = 20480'b0;
initial begin
// Check parameters
if ((RAM_MODE != "SDP") && (RAM_MODE != "TDP")) begin
$display("ERROR: Illegal RAM MODE %d.", RAM_MODE);
$finish();
end
if ((A_WR_MODE != "WRITE_THROUGH") && (A_WR_MODE != "NO_CHANGE")) begin
$display("ERROR: Illegal RAM MODE %d.", RAM_MODE);
$finish();
end
if ((RAM_MODE == "SDP") && (A_WR_MODE == "WRITE_THROUGH")) begin
$display("ERROR: %s is not supported in %s mode.", A_WR_MODE, RAM_MODE);
$finish();
end
if (ECC_EN != 1'b0) begin
$display("WARNING: ECC feature not supported in simulation.");
end
if ((ECC_EN == 1'b1) && (RAM_MODE != "SDP") && (WIDTH_MODE_A != 40)) begin
$display("ERROR: Illegal ECC Port configuration. Must be SDP 40 bit, but is %s %d.", RAM_MODE, WIDTH_MODE_A);
$finish();
end
if ((WIDTH_MODE_A == 40) && (RAM_MODE == "TDP")) begin
$display("ERROR: Port A width of 40 bits is only supported in SDP mode.");
$finish();
end
if ((WIDTH_MODE_B == 40) && (RAM_MODE == "TDP")) begin
$display("ERROR: Port B width of 40 bits is only supported in SDP mode.");
$finish();
end
if ((WIDTH_MODE_A != 40) && (WIDTH_MODE_A != 20) && (WIDTH_MODE_A != 10) &&
(WIDTH_MODE_A != 5) && (WIDTH_MODE_A != 2) && (WIDTH_MODE_A != 1) && (WIDTH_MODE_A != 0)) begin
$display("ERROR: Illegal %s Port A width configuration %d.", RAM_MODE, WIDTH_MODE_A);
$finish();
end
if ((WIDTH_MODE_B != 40) && (WIDTH_MODE_B != 20) && (WIDTH_MODE_B != 10) &&
(WIDTH_MODE_B != 5) && (WIDTH_MODE_B != 2) && (WIDTH_MODE_B != 1) && (WIDTH_MODE_B != 0)) begin
$display("ERROR: Illegal %s Port B width configuration %d.", RAM_MODE, WIDTH_MODE_B);
$finish();
end
// RAM initialization
memory[320*0+319:320*0] = INIT_00;
memory[320*1+319:320*1] = INIT_01;
memory[320*2+319:320*2] = INIT_02;
memory[320*3+319:320*3] = INIT_03;
memory[320*4+319:320*4] = INIT_04;
memory[320*5+319:320*5] = INIT_05;
memory[320*6+319:320*6] = INIT_06;
memory[320*7+319:320*7] = INIT_07;
memory[320*8+319:320*8] = INIT_08;
memory[320*9+319:320*9] = INIT_09;
memory[320*10+319:320*10] = INIT_0A;
memory[320*11+319:320*11] = INIT_0B;
memory[320*12+319:320*12] = INIT_0C;
memory[320*13+319:320*13] = INIT_0D;
memory[320*14+319:320*14] = INIT_0E;
memory[320*15+319:320*15] = INIT_0F;
memory[320*16+319:320*16] = INIT_10;
memory[320*17+319:320*17] = INIT_11;
memory[320*18+319:320*18] = INIT_12;
memory[320*19+319:320*19] = INIT_13;
memory[320*20+319:320*20] = INIT_14;
memory[320*21+319:320*21] = INIT_15;
memory[320*22+319:320*22] = INIT_16;
memory[320*23+319:320*23] = INIT_17;
memory[320*24+319:320*24] = INIT_18;
memory[320*25+319:320*25] = INIT_19;
memory[320*26+319:320*26] = INIT_1A;
memory[320*27+319:320*27] = INIT_1B;
memory[320*28+319:320*28] = INIT_1C;
memory[320*29+319:320*29] = INIT_1D;
memory[320*30+319:320*30] = INIT_1E;
memory[320*31+319:320*31] = INIT_1F;
memory[320*32+319:320*32] = INIT_20;
memory[320*33+319:320*33] = INIT_21;
memory[320*34+319:320*34] = INIT_22;
memory[320*35+319:320*35] = INIT_23;
memory[320*36+319:320*36] = INIT_24;
memory[320*37+319:320*37] = INIT_25;
memory[320*38+319:320*38] = INIT_26;
memory[320*39+319:320*39] = INIT_27;
memory[320*40+319:320*40] = INIT_28;
memory[320*41+319:320*41] = INIT_29;
memory[320*42+319:320*42] = INIT_2A;
memory[320*43+319:320*43] = INIT_2B;
memory[320*44+319:320*44] = INIT_2C;
memory[320*45+319:320*45] = INIT_2D;
memory[320*46+319:320*46] = INIT_2E;
memory[320*47+319:320*47] = INIT_2F;
memory[320*48+319:320*48] = INIT_30;
memory[320*49+319:320*49] = INIT_31;
memory[320*50+319:320*50] = INIT_32;
memory[320*51+319:320*51] = INIT_33;
memory[320*52+319:320*52] = INIT_34;
memory[320*53+319:320*53] = INIT_35;
memory[320*54+319:320*54] = INIT_36;
memory[320*55+319:320*55] = INIT_37;
memory[320*56+319:320*56] = INIT_38;
memory[320*57+319:320*57] = INIT_39;
memory[320*58+319:320*58] = INIT_3A;
memory[320*59+319:320*59] = INIT_3B;
memory[320*60+319:320*60] = INIT_3C;
memory[320*61+319:320*61] = INIT_3D;
memory[320*62+319:320*62] = INIT_3E;
memory[320*63+319:320*63] = INIT_3F;
end
// Signal inversion
wire clka = A_CLK_INV ^ A_CLK;
wire clkb = B_CLK_INV ^ B_CLK;
wire ena = A_EN_INV ^ A_EN;
wire enb = B_EN_INV ^ B_EN;
wire wea = A_WE_INV ^ A_WE;
wire web = B_WE_INV ^ B_WE;
// Internal signals
wire [15:0] addra;
wire [15:0] addrb;
reg [19:0] A_DO_out = 0, A_DO_reg = 0;
reg [19:0] B_DO_out = 0, B_DO_reg = 0;
generate
if (RAM_MODE == "SDP") begin
// Port A (write)
if (A_WR_WIDTH == 40) begin
assign addra = A_ADDR[15:7]*40;
end
// Port B (read)
if (B_RD_WIDTH == 40) begin
assign addrb = B_ADDR[15:7]*40;
end
end
else if (RAM_MODE == "TDP") begin
// Port A
if (WIDTH_MODE_A <= 1) begin
wire [15:0] tmpa = {2'b0, A_ADDR[15:7], A_ADDR[5:1]};
assign addra = tmpa + (tmpa/4);
end
else if (WIDTH_MODE_A <= 2) begin
wire [15:0] tmpa = {3'b0, A_ADDR[15:7], A_ADDR[5:2]};
assign addra = tmpa*2 + (tmpa/2);
end
else if (WIDTH_MODE_A <= 5) begin
assign addra = {4'b0, A_ADDR[15:7], A_ADDR[5:3]}*5;
end
else if (WIDTH_MODE_A <= 10) begin
assign addra = {5'b0, A_ADDR[15:7], A_ADDR[5:4]}*10;
end
else if (WIDTH_MODE_A <= 20) begin
assign addra = {6'b0, A_ADDR[15:7], A_ADDR[5]}*20;
end
// Port B
if (WIDTH_MODE_B <= 1) begin
wire [15:0] tmpb = {2'b0, B_ADDR[15:7], B_ADDR[5:1]};
assign addrb = tmpb + (tmpb/4);
end
else if (WIDTH_MODE_B <= 2) begin
wire [15:0] tmpb = {3'b0, B_ADDR[15:7], B_ADDR[5:2]};
assign addrb = tmpb*2 + (tmpb/2);
end
else if (WIDTH_MODE_B <= 5) begin
assign addrb = {4'b0, B_ADDR[15:7], B_ADDR[5:3]}*5;
end
else if (WIDTH_MODE_B <= 10) begin
assign addrb = {5'b0, B_ADDR[15:7], B_ADDR[5:4]}*10;
end
else if (WIDTH_MODE_B <= 20) begin
assign addrb = {6'b0, B_ADDR[15:7], B_ADDR[5]}*20;
end
end
endgenerate
generate
if (RAM_MODE == "SDP") begin
// SDP write port
always @(posedge clka)
begin
for (k=0; k < A_WR_WIDTH; k=k+1) begin
if (k < 20) begin
if (ena && wea && A_BM[k]) memory[addra+k] <= A_DI[k];
end
else begin // use both ports
if (ena && wea && B_BM[k-20]) memory[addra+k] <= B_DI[k-20];
end
end
end
// SDP read port
always @(posedge clkb)
begin
for (k=0; k < B_RD_WIDTH; k=k+1) begin
if (k < 20) begin
if (enb) A_DO_out[k] <= memory[addrb+k];
end
else begin // use both ports
if (enb) B_DO_out[k-20] <= memory[addrb+k];
end
end
end
end
else if (RAM_MODE == "TDP") begin
// TDP port A
always @(posedge clka)
begin
for (i=0; i < WIDTH_MODE_A; i=i+1) begin
if (ena && wea && A_BM[i]) memory[addra+i] <= A_DI[i];
if (A_WR_MODE == "NO_CHANGE") begin
if (ena && !wea) A_DO_out[i] <= memory[addra+i];
end
else if (A_WR_MODE == "WRITE_THROUGH") begin
if (ena) begin
if (wea && A_BM[i]) begin
A_DO_out[i] <= A_DI[i];
end
else begin
A_DO_out[i] <= memory[addra+i];
end
end
end
end
end
// TDP port B
always @(posedge clkb)
begin
for (i=0; i < WIDTH_MODE_B; i=i+1) begin
if (enb && web && B_BM[i]) memory[addrb+i] <= B_DI[i];
if (B_WR_MODE == "NO_CHANGE") begin
if (enb && !web) B_DO_out[i] <= memory[addrb+i];
end
else if (B_WR_MODE == "WRITE_THROUGH") begin
if (enb) begin
if (web && B_BM[i]) begin
B_DO_out[i] <= B_DI[i];
end
else begin
B_DO_out[i] <= memory[addrb+i];
end
end
end
end
end
end
endgenerate
// Optional output register
generate
if (A_DO_REG) begin
always @(posedge clka) begin
A_DO_reg <= A_DO_out;
end
assign A_DO = A_DO_reg;
end
else begin
assign A_DO = A_DO_out;
end
if (B_DO_REG) begin
always @(posedge clkb) begin
B_DO_reg <= B_DO_out;
end
assign B_DO = B_DO_reg;
end
else begin
assign B_DO = B_DO_out;
end
endgenerate
endmodule
module CC_BRAM_40K (
output [39:0] A_DO,
output [39:0] B_DO,
output A_ECC_1B_ERR,
output B_ECC_1B_ERR,
output A_ECC_2B_ERR,
output B_ECC_2B_ERR,
output reg A_CO = 0,
output reg B_CO = 0,
(* clkbuf_sink *)
input A_CLK,
(* clkbuf_sink *)
input B_CLK,
input A_EN,
input B_EN,
input A_WE,
input B_WE,
input [15:0] A_ADDR,
input [15:0] B_ADDR,
input [39:0] A_DI,
input [39:0] B_DI,
input [39:0] A_BM,
input [39:0] B_BM,
input A_CI,
input B_CI
);
// Location format: D(0..N-1)X(0..3)Y(0..7) or UNPLACED
parameter LOC = "UNPLACED";
parameter CAS = "NONE"; // NONE, UPPER, LOWER
// Port Widths
parameter A_RD_WIDTH = 0;
parameter B_RD_WIDTH = 0;
parameter A_WR_WIDTH = 0;
parameter B_WR_WIDTH = 0;
// RAM and Write Modes
parameter RAM_MODE = "SDP";
parameter A_WR_MODE = "NO_CHANGE";
parameter B_WR_MODE = "NO_CHANGE";
// Inverting Control Pins
parameter A_CLK_INV = 1'b0;
parameter B_CLK_INV = 1'b0;
parameter A_EN_INV = 1'b0;
parameter B_EN_INV = 1'b0;
parameter A_WE_INV = 1'b0;
parameter B_WE_INV = 1'b0;
// Output Register
parameter A_DO_REG = 1'b0;
parameter B_DO_REG = 1'b0;
// Error Checking and Correction
parameter A_ECC_EN = 1'b0;
parameter B_ECC_EN = 1'b0;
parameter INIT_00 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_01 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_02 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_03 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_04 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_05 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_06 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_07 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_08 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_09 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_0A = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_0B = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_0C = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_0D = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_0E = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_0F = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_10 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_11 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_12 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_13 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_14 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_15 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_16 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_17 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_18 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_19 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_1A = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_1B = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_1C = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_1D = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_1E = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_1F = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_20 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_21 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_22 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_23 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_24 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_25 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_26 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_27 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_28 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_29 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_2A = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_2B = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_2C = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_2D = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_2E = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_2F = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_30 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_31 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_32 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_33 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_34 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_35 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_36 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_37 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_38 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_39 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_3A = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_3B = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_3C = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_3D = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_3E = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_3F = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_40 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_41 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_42 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_43 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_44 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_45 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_46 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_47 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_48 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_49 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_4A = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_4B = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_4C = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_4D = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_4E = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_4F = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_50 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_51 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_52 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_53 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_54 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_55 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_56 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_57 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_58 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_59 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_5A = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_5B = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_5C = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_5D = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_5E = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_5F = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_60 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_61 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_62 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_63 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_64 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_65 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_66 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_67 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_68 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_69 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_6A = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_6B = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_6C = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_6D = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_6E = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_6F = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_70 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_71 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_72 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_73 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_74 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_75 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_76 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_77 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_78 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_79 = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_7A = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_7B = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_7C = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_7D = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_7E = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
parameter INIT_7F = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
localparam WIDTH_MODE_A = (A_RD_WIDTH > A_WR_WIDTH) ? A_RD_WIDTH : A_WR_WIDTH;
localparam WIDTH_MODE_B = (B_RD_WIDTH > B_WR_WIDTH) ? B_RD_WIDTH : B_WR_WIDTH;
integer i, k;
// 512 x 80 bit
reg [40959:0] memory = 40960'b0;
initial begin
// Check parameters
if ((RAM_MODE != "SDP") && (RAM_MODE != "TDP")) begin
$display("ERROR: Illegal RAM MODE %d.", RAM_MODE);
$finish();
end
if ((A_WR_MODE != "WRITE_THROUGH") && (A_WR_MODE != "NO_CHANGE")) begin
$display("ERROR: Illegal RAM MODE %d.", RAM_MODE);
$finish();
end
if ((RAM_MODE == "SDP") && (A_WR_MODE == "WRITE_THROUGH")) begin
$display("ERROR: %s is not supported in %s mode.", A_WR_MODE, RAM_MODE);
$finish();
end
if ((A_ECC_EN != 1'b0) || (B_ECC_EN != 1'b0)) begin
$display("WARNING: ECC feature not supported in simulation.");
end
if ((A_ECC_EN == 1'b1) && (RAM_MODE != "SDP") && (WIDTH_MODE_A != 40)) begin
$display("ERROR: Illegal ECC Port A configuration. Must be SDP 40 bit, but is %s %d.", RAM_MODE, WIDTH_MODE_A);
$finish();
end
if ((WIDTH_MODE_A == 80) && (RAM_MODE == "TDP")) begin
$display("ERROR: Port A width of 80 bits is only supported in SDP mode.");
$finish();
end
if ((WIDTH_MODE_B == 80) && (RAM_MODE == "TDP")) begin
$display("ERROR: Port B width of 80 bits is only supported in SDP mode.");
$finish();
end
if ((WIDTH_MODE_A != 80) && (WIDTH_MODE_A != 40) && (WIDTH_MODE_A != 20) && (WIDTH_MODE_A != 10) &&
(WIDTH_MODE_A != 5) && (WIDTH_MODE_A != 2) && (WIDTH_MODE_A != 1) && (WIDTH_MODE_A != 0)) begin
$display("ERROR: Illegal %s Port A width configuration %d.", RAM_MODE, WIDTH_MODE_A);
$finish();
end
if ((WIDTH_MODE_B != 80) && (WIDTH_MODE_B != 40) && (WIDTH_MODE_B != 20) && (WIDTH_MODE_B != 10) &&
(WIDTH_MODE_B != 5) && (WIDTH_MODE_B != 2) && (WIDTH_MODE_B != 1) && (WIDTH_MODE_B != 0)) begin
$display("ERROR: Illegal %s Port B width configuration %d.", RAM_MODE, WIDTH_MODE_B);
$finish();
end
if ((CAS != "NONE") && ((WIDTH_MODE_A > 1) || (WIDTH_MODE_B > 1))) begin
$display("ERROR: Cascade feature only supported in 1 bit data width mode.");
$finish();
end
if ((CAS != "NONE") && (RAM_MODE != "TDP")) begin
$display("ERROR: Cascade feature only supported in TDP mode.");
$finish();
end
// RAM initialization
memory[320*0+319:320*0] = INIT_00;
memory[320*1+319:320*1] = INIT_01;
memory[320*2+319:320*2] = INIT_02;
memory[320*3+319:320*3] = INIT_03;
memory[320*4+319:320*4] = INIT_04;
memory[320*5+319:320*5] = INIT_05;
memory[320*6+319:320*6] = INIT_06;
memory[320*7+319:320*7] = INIT_07;
memory[320*8+319:320*8] = INIT_08;
memory[320*9+319:320*9] = INIT_09;
memory[320*10+319:320*10] = INIT_0A;
memory[320*11+319:320*11] = INIT_0B;
memory[320*12+319:320*12] = INIT_0C;
memory[320*13+319:320*13] = INIT_0D;
memory[320*14+319:320*14] = INIT_0E;
memory[320*15+319:320*15] = INIT_0F;
memory[320*16+319:320*16] = INIT_10;
memory[320*17+319:320*17] = INIT_11;
memory[320*18+319:320*18] = INIT_12;
memory[320*19+319:320*19] = INIT_13;
memory[320*20+319:320*20] = INIT_14;
memory[320*21+319:320*21] = INIT_15;
memory[320*22+319:320*22] = INIT_16;
memory[320*23+319:320*23] = INIT_17;
memory[320*24+319:320*24] = INIT_18;
memory[320*25+319:320*25] = INIT_19;
memory[320*26+319:320*26] = INIT_1A;
memory[320*27+319:320*27] = INIT_1B;
memory[320*28+319:320*28] = INIT_1C;
memory[320*29+319:320*29] = INIT_1D;
memory[320*30+319:320*30] = INIT_1E;
memory[320*31+319:320*31] = INIT_1F;
memory[320*32+319:320*32] = INIT_20;
memory[320*33+319:320*33] = INIT_21;
memory[320*34+319:320*34] = INIT_22;
memory[320*35+319:320*35] = INIT_23;
memory[320*36+319:320*36] = INIT_24;
memory[320*37+319:320*37] = INIT_25;
memory[320*38+319:320*38] = INIT_26;
memory[320*39+319:320*39] = INIT_27;
memory[320*40+319:320*40] = INIT_28;
memory[320*41+319:320*41] = INIT_29;
memory[320*42+319:320*42] = INIT_2A;
memory[320*43+319:320*43] = INIT_2B;
memory[320*44+319:320*44] = INIT_2C;
memory[320*45+319:320*45] = INIT_2D;
memory[320*46+319:320*46] = INIT_2E;
memory[320*47+319:320*47] = INIT_2F;
memory[320*48+319:320*48] = INIT_30;
memory[320*49+319:320*49] = INIT_31;
memory[320*50+319:320*50] = INIT_32;
memory[320*51+319:320*51] = INIT_33;
memory[320*52+319:320*52] = INIT_34;
memory[320*53+319:320*53] = INIT_35;
memory[320*54+319:320*54] = INIT_36;
memory[320*55+319:320*55] = INIT_37;
memory[320*56+319:320*56] = INIT_38;
memory[320*57+319:320*57] = INIT_39;
memory[320*58+319:320*58] = INIT_3A;
memory[320*59+319:320*59] = INIT_3B;
memory[320*60+319:320*60] = INIT_3C;
memory[320*61+319:320*61] = INIT_3D;
memory[320*62+319:320*62] = INIT_3E;
memory[320*63+319:320*63] = INIT_3F;
memory[320*64+319:320*64] = INIT_40;
memory[320*65+319:320*65] = INIT_41;
memory[320*66+319:320*66] = INIT_42;
memory[320*67+319:320*67] = INIT_43;
memory[320*68+319:320*68] = INIT_44;
memory[320*69+319:320*69] = INIT_45;
memory[320*70+319:320*70] = INIT_46;
memory[320*71+319:320*71] = INIT_47;
memory[320*72+319:320*72] = INIT_48;
memory[320*73+319:320*73] = INIT_49;
memory[320*74+319:320*74] = INIT_4A;
memory[320*75+319:320*75] = INIT_4B;
memory[320*76+319:320*76] = INIT_4C;
memory[320*77+319:320*77] = INIT_4D;
memory[320*78+319:320*78] = INIT_4E;
memory[320*79+319:320*79] = INIT_4F;
memory[320*80+319:320*80] = INIT_50;
memory[320*81+319:320*81] = INIT_51;
memory[320*82+319:320*82] = INIT_52;
memory[320*83+319:320*83] = INIT_53;
memory[320*84+319:320*84] = INIT_54;
memory[320*85+319:320*85] = INIT_55;
memory[320*86+319:320*86] = INIT_56;
memory[320*87+319:320*87] = INIT_57;
memory[320*88+319:320*88] = INIT_58;
memory[320*89+319:320*89] = INIT_59;
memory[320*90+319:320*90] = INIT_5A;
memory[320*91+319:320*91] = INIT_5B;
memory[320*92+319:320*92] = INIT_5C;
memory[320*93+319:320*93] = INIT_5D;
memory[320*94+319:320*94] = INIT_5E;
memory[320*95+319:320*95] = INIT_5F;
memory[320*96+319:320*96] = INIT_60;
memory[320*97+319:320*97] = INIT_61;
memory[320*98+319:320*98] = INIT_62;
memory[320*99+319:320*99] = INIT_63;
memory[320*100+319:320*100] = INIT_64;
memory[320*101+319:320*101] = INIT_65;
memory[320*102+319:320*102] = INIT_66;
memory[320*103+319:320*103] = INIT_67;
memory[320*104+319:320*104] = INIT_68;
memory[320*105+319:320*105] = INIT_69;
memory[320*106+319:320*106] = INIT_6A;
memory[320*107+319:320*107] = INIT_6B;
memory[320*108+319:320*108] = INIT_6C;
memory[320*109+319:320*109] = INIT_6D;
memory[320*110+319:320*110] = INIT_6E;
memory[320*111+319:320*111] = INIT_6F;
memory[320*112+319:320*112] = INIT_70;
memory[320*113+319:320*113] = INIT_71;
memory[320*114+319:320*114] = INIT_72;
memory[320*115+319:320*115] = INIT_73;
memory[320*116+319:320*116] = INIT_74;
memory[320*117+319:320*117] = INIT_75;
memory[320*118+319:320*118] = INIT_76;
memory[320*119+319:320*119] = INIT_77;
memory[320*120+319:320*120] = INIT_78;
memory[320*121+319:320*121] = INIT_79;
memory[320*122+319:320*122] = INIT_7A;
memory[320*123+319:320*123] = INIT_7B;
memory[320*124+319:320*124] = INIT_7C;
memory[320*125+319:320*125] = INIT_7D;
memory[320*126+319:320*126] = INIT_7E;
memory[320*127+319:320*127] = INIT_7F;
end
// Signal inversion
wire clka = A_CLK_INV ^ A_CLK;
wire clkb = B_CLK_INV ^ B_CLK;
wire ena = A_EN_INV ^ A_EN;
wire enb = B_EN_INV ^ B_EN;
wire wea = A_WE_INV ^ A_WE;
wire web = B_WE_INV ^ B_WE;
// Internal signals
wire [15:0] addra;
wire [15:0] addrb;
reg [39:0] A_DO_out = 0, A_DO_reg = 0;
reg [39:0] B_DO_out = 0, B_DO_reg = 0;
generate
if (RAM_MODE == "SDP") begin
// Port A (write)
if (A_WR_WIDTH == 80) begin
assign addra = A_ADDR[15:7]*80;
end
// Port B (read)
if (B_RD_WIDTH == 80) begin
assign addrb = B_ADDR[15:7]*80;
end
end
else if (RAM_MODE == "TDP") begin
// Port A
if (WIDTH_MODE_A <= 1) begin
wire [15:0] tmpa = {1'b0, A_ADDR[15:1]};
assign addra = tmpa + (tmpa/4);
end
else if (WIDTH_MODE_A <= 2) begin
wire [15:0] tmpa = {2'b0, A_ADDR[15:2]};
assign addra = tmpa*2 + (tmpa/2);
end
else if (WIDTH_MODE_A <= 5) begin
assign addra = {3'b0, A_ADDR[15:3]}*5;
end
else if (WIDTH_MODE_A <= 10) begin
assign addra = {4'b0, A_ADDR[15:4]}*10;
end
else if (WIDTH_MODE_A <= 20) begin
assign addra = {5'b0, A_ADDR[15:5]}*20;
end
else if (WIDTH_MODE_A <= 40) begin
assign addra = {6'b0, A_ADDR[15:6]}*40;
end
// Port B
if (WIDTH_MODE_B <= 1) begin
wire [15:0] tmpb = {1'b0, B_ADDR[15:1]};
assign addrb = tmpb + (tmpb/4);
end
else if (WIDTH_MODE_B <= 2) begin
wire [15:0] tmpb = {2'b0, B_ADDR[15:2]};
assign addrb = tmpb*2 + (tmpb/2);
end
else if (WIDTH_MODE_B <= 5) begin
assign addrb = {3'b0, B_ADDR[15:3]}*5;
end
else if (WIDTH_MODE_B <= 10) begin
assign addrb = {4'b0, B_ADDR[15:4]}*10;
end
else if (WIDTH_MODE_B <= 20) begin
assign addrb = {5'b0, B_ADDR[15:5]}*20;
end
else if (WIDTH_MODE_B <= 40) begin
assign addrb = {6'b0, B_ADDR[15:6]}*40;
end
end
endgenerate
generate
if (RAM_MODE == "SDP") begin
// SDP write port
always @(posedge clka)
begin
for (k=0; k < A_WR_WIDTH; k=k+1) begin
if (k < 40) begin
if (ena && wea && A_BM[k]) memory[addra+k] <= A_DI[k];
end
else begin // use both ports
if (ena && wea && B_BM[k-40]) memory[addra+k] <= B_DI[k-40];
end
end
end
// SDP read port
always @(posedge clkb)
begin
for (k=0; k < B_RD_WIDTH; k=k+1) begin
if (k < 40) begin
if (enb) A_DO_out[k] <= memory[addrb+k];
end
else begin // use both ports
if (enb) B_DO_out[k-40] <= memory[addrb+k];
end
end
end
end
else if (RAM_MODE == "TDP") begin
// {A,B}_ADDR[0]=0 selects lower, {A,B}_ADDR[0]=1 selects upper cascade memory
wire upper_sel_a = ((CAS == "UPPER") && (A_ADDR[0] == 1));
wire lower_sel_a = ((CAS == "LOWER") && (A_ADDR[0] == 0));
wire upper_sel_b = ((CAS == "UPPER") && (B_ADDR[0] == 1));
wire lower_sel_b = ((CAS == "LOWER") && (B_ADDR[0] == 0));
reg dumm;
// Cascade output port A
always @(*)
begin
if ((A_WR_MODE == "NO_CHANGE") && lower_sel_a) begin
A_CO = memory[addra];
end
else if ((A_WR_MODE == "WRITE_THROUGH") && lower_sel_a) begin
A_CO = ((wea && A_BM[0]) ? (A_DI[0]) : (memory[addra]));
end
end
// Cascade output port B
always @(*)
begin
if ((B_WR_MODE == "NO_CHANGE") && lower_sel_b) begin
B_CO = memory[addrb];
end
else if ((B_WR_MODE == "WRITE_THROUGH") && lower_sel_b) begin
B_CO = ((web && B_BM[0]) ? (B_DI[0]) : (memory[addrb]));
end
end
// TDP port A
always @(posedge clka)
begin
for (i=0; i < WIDTH_MODE_A; i=i+1) begin
if (upper_sel_a || lower_sel_a || (CAS == "NONE")) begin
if (ena && wea && A_BM[i])
memory[addra+i] <= A_DI[i];
end
if (A_WR_MODE == "NO_CHANGE") begin
if (ena && !wea) begin
if (CAS == "UPPER") begin
A_DO_out[i] <= ((A_ADDR[0] == 1) ? (memory[addra+i]) : (A_CI));
end
else if (CAS == "NONE") begin
A_DO_out[i] <= memory[addra+i];
end
end
end
else if (A_WR_MODE == "WRITE_THROUGH") begin
if (ena) begin
if (CAS == "UPPER") begin
if (A_ADDR[0] == 1) begin
A_DO_out[i] <= ((wea && A_BM[i]) ? (A_DI[i]) : (memory[addra+i]));
end else begin
A_DO_out[i] <= A_CI;
end
end
else if (CAS == "NONE") begin
A_DO_out[i] <= ((wea && A_BM[i]) ? (A_DI[i]) : (memory[addra+i]));
end
end
end
end
end
// TDP port B
always @(posedge clkb)
begin
for (i=0; i < WIDTH_MODE_B; i=i+1) begin
if (upper_sel_b || lower_sel_b || (CAS == "NONE")) begin
if (enb && web && B_BM[i])
memory[addrb+i] <= B_DI[i];
end
if (B_WR_MODE == "NO_CHANGE") begin
if (enb && !web) begin
if (CAS == "UPPER") begin
B_DO_out[i] <= ((B_ADDR[0] == 1) ? (memory[addrb+i]) : (B_CI));
end
else if (CAS == "NONE") begin
B_DO_out[i] <= memory[addrb+i];
end
end
end
else if (B_WR_MODE == "WRITE_THROUGH") begin
if (enb) begin
if (CAS == "UPPER") begin
if (B_ADDR[0] == 1) begin
B_DO_out[i] <= ((web && B_BM[i]) ? (B_DI[i]) : (memory[addrb+i]));
end else begin
B_DO_out[i] <= B_CI;
end
end
else if (CAS == "NONE") begin
B_DO_out[i] <= ((web && B_BM[i]) ? (B_DI[i]) : (memory[addrb+i]));
end
end
end
end
end
end
endgenerate
// Optional output register
generate
if (A_DO_REG) begin
always @(posedge clka) begin
A_DO_reg <= A_DO_out;
end
assign A_DO = A_DO_reg;
end
else begin
assign A_DO = A_DO_out;
end
if (B_DO_REG) begin
always @(posedge clkb) begin
B_DO_reg <= B_DO_out;
end
assign B_DO = B_DO_reg;
end
else begin
assign B_DO = B_DO_out;
end
endgenerate
endmodule
module CC_FIFO_40K (
output A_ECC_1B_ERR,
output B_ECC_1B_ERR,
output A_ECC_2B_ERR,
output B_ECC_2B_ERR,
// FIFO pop port
output [39:0] A_DO,
output [39:0] B_DO,
(* clkbuf_sink *)
input A_CLK,
input A_EN,
// FIFO push port
input [39:0] A_DI,
input [39:0] B_DI,
input [39:0] A_BM,
input [39:0] B_BM,
(* clkbuf_sink *)
input B_CLK,
input B_EN,
input B_WE,
// FIFO control
input F_RST_N,
input [14:0] F_ALMOST_FULL_OFFSET,
input [14:0] F_ALMOST_EMPTY_OFFSET,
// FIFO status signals
output F_FULL,
output F_EMPTY,
output F_ALMOST_FULL,
output F_ALMOST_EMPTY,
output F_RD_ERROR,
output F_WR_ERROR,
output [15:0] F_RD_PTR,
output [15:0] F_WR_PTR
);
// Location format: D(0..N-1)X(0..3)Y(0..7) or UNPLACED
parameter LOC = "UNPLACED";
// Offset configuration
parameter DYN_STAT_SELECT = 1'b0;
parameter [14:0] ALMOST_FULL_OFFSET = 15'b0;
parameter [14:0] ALMOST_EMPTY_OFFSET = 15'b0;
// Port Widths
parameter A_WIDTH = 0;
parameter B_WIDTH = 0;
// RAM and Write Modes
parameter RAM_MODE = "TDP"; // "TDP" or "SDP"
parameter FIFO_MODE = "SYNC"; // "ASYNC" or "SYNC"
// Inverting Control Pins
parameter A_CLK_INV = 1'b0;
parameter B_CLK_INV = 1'b0;
parameter A_EN_INV = 1'b0;
parameter B_EN_INV = 1'b0;
parameter A_WE_INV = 1'b0;
parameter B_WE_INV = 1'b0;
// Output Register
parameter A_DO_REG = 1'b0;
parameter B_DO_REG = 1'b0;
// Error Checking and Correction
parameter A_ECC_EN = 1'b0;
parameter B_ECC_EN = 1'b0;
integer i, k;
// 512 x 80 bit
reg [40959:0] memory = 40960'b0;
reg [15:0] counter_max;
reg [15:0] sram_depth;
localparam tp = (A_WIDTH == 1) ? 15 :
(A_WIDTH == 2) ? 14 :
(A_WIDTH == 5) ? 13 :
(A_WIDTH == 10) ? 12 :
(A_WIDTH == 20) ? 11 :
(A_WIDTH == 40) ? 10 : 9;
initial begin
// Check parameters
if ((RAM_MODE != "SDP") && (RAM_MODE != "TDP")) begin
$display("ERROR: Illegal RAM MODE %d.", RAM_MODE);
$finish();
end
if ((FIFO_MODE != "ASYNC") && (FIFO_MODE != "SYNC")) begin
$display("ERROR: Illegal FIFO MODE %d.", FIFO_MODE);
$finish();
end
if ((RAM_MODE == "SDP") && (DYN_STAT_SELECT == 1)) begin
$display("ERROR: Dynamic offset configuration is not supported in %s mode.", RAM_MODE);
$finish();
end
if ((RAM_MODE == "SDP") && ((A_WIDTH != 80) || (B_WIDTH != 80))) begin
$display("ERROR: SDP is ony supported in 80 bit mode.");
$finish();
end
if ((A_WIDTH == 80) && (RAM_MODE == "TDP")) begin
$display("ERROR: Port A width of 80 bits is only supported in SDP mode.");
$finish();
end
if ((B_WIDTH == 80) && (RAM_MODE == "TDP")) begin
$display("ERROR: Port B width of 80 bits is only supported in SDP mode.");
$finish();
end
if ((A_WIDTH != 80) && (A_WIDTH != 40) && (A_WIDTH != 20) && (A_WIDTH != 10) &&
(A_WIDTH != 5) && (A_WIDTH != 2) && (A_WIDTH != 1) && (A_WIDTH != 0)) begin
$display("ERROR: Illegal %s Port A width configuration %d.", RAM_MODE, A_WIDTH);
$finish();
end
if ((B_WIDTH != 80) && (B_WIDTH != 40) && (B_WIDTH != 20) && (B_WIDTH != 10) &&
(B_WIDTH != 5) && (B_WIDTH != 2) && (B_WIDTH != 1) && (B_WIDTH != 0)) begin
$display("ERROR: Illegal %s Port B width configuration %d.", RAM_MODE, B_WIDTH);
$finish();
end
if (A_WIDTH != B_WIDTH) begin
$display("ERROR: The values of A_WIDTH and B_WIDTH must be equal.");
end
if ((A_ECC_EN == 1'b1) && (RAM_MODE != "SDP") && (A_WIDTH != 40)) begin
$display("ERROR: Illegal ECC Port A configuration. ECC mode requires TDP >=40 bit or SDP 80 bit, but is %s %d.", RAM_MODE, A_WIDTH);
$finish();
end
// Set local parameters
if (A_WIDTH == 1) begin // A_WIDTH=B_WIDTH
counter_max = 2 * 32*1024 - 1;
sram_depth = 32*1024;
end
else if (A_WIDTH == 2) begin
counter_max = 2 * 16*1024 - 1;
sram_depth = 16*1024;
end
else if (A_WIDTH == 5) begin
counter_max = 2 * 8*1024 - 1;
sram_depth = 8*1024;
end
else if (A_WIDTH == 10) begin
counter_max = 2 * 4*1024 - 1;
sram_depth = 4*1024;
end
else if (A_WIDTH == 20) begin
counter_max = 2 * 2*1024 - 1;
sram_depth = 2*1024;
end
else if (A_WIDTH == 40) begin
counter_max = 2 * 1*1024 - 1;
sram_depth = 1*1024;
end
else begin // 80 bit SDP
counter_max = 2 * 512 - 1;
sram_depth = 512;
end
end
// Internal signals
wire fifo_rdclk = A_CLK ^ A_CLK_INV;
wire fifo_wrclk = (FIFO_MODE == "ASYNC") ? (B_CLK ^ B_CLK_INV) : (A_CLK ^ A_CLK_INV);
wire [15:0] almost_full_offset = DYN_STAT_SELECT ? F_ALMOST_FULL_OFFSET : ALMOST_FULL_OFFSET;
wire [15:0] almost_empty_offset = DYN_STAT_SELECT ? F_ALMOST_EMPTY_OFFSET : ALMOST_EMPTY_OFFSET;
reg [39:0] A_DO_out = 0, A_DO_reg = 0;
reg [39:0] B_DO_out = 0, B_DO_reg = 0;
// Status signals
reg fifo_full;
reg fifo_empty;
reg fifo_almost_full;
reg fifo_almost_empty;
assign F_FULL = fifo_full;
assign F_EMPTY = fifo_empty;
assign F_ALMOST_FULL = fifo_almost_full;
assign F_ALMOST_EMPTY = fifo_almost_empty;
assign F_WR_ERROR = (F_FULL && (B_EN ^ B_EN_INV) && (B_WE ^ B_WE_INV));
assign F_RD_ERROR = (F_EMPTY && (A_EN ^ A_EN_INV));
wire ram_we = (~F_FULL && (B_EN ^ B_EN_INV) && (B_WE ^ B_WE_INV));
wire ram_en = (~F_EMPTY && (A_EN ^ A_EN_INV));
// Reset synchronizers
reg [1:0] aclk_reset_q, bclk_reset_q;
wire fifo_sync_rstn = aclk_reset_q;
wire fifo_async_wrrstn = bclk_reset_q;
wire fifo_async_rdrstn = aclk_reset_q;
always @(posedge fifo_rdclk or negedge F_RST_N)
begin
if (F_RST_N == 1'b0) begin
aclk_reset_q <= 2'b0;
end
else begin
aclk_reset_q[1] <= aclk_reset_q[0];
aclk_reset_q[0] <= 1'b1;
end
end
always @(posedge fifo_wrclk or negedge F_RST_N)
begin
if (F_RST_N == 1'b0) begin
bclk_reset_q <= 2'b0;
end
else begin
bclk_reset_q[1] <= bclk_reset_q[0];
bclk_reset_q[0] <= 1'b1;
end
end
// Push/pop pointers
reg [15:0] rd_pointer, rd_pointer_int;
reg [15:0] wr_pointer, wr_pointer_int;
reg [15:0] rd_pointer_cmp, wr_pointer_cmp;
wire [15:0] rd_pointer_nxt;
wire [15:0] wr_pointer_nxt;
reg [15:0] fifo_rdaddr, rdaddr;
reg [15:0] fifo_wraddr, wraddr;
assign F_RD_PTR = fifo_rdaddr;
assign F_WR_PTR = fifo_wraddr;
always @(posedge fifo_rdclk or negedge F_RST_N)
begin
if (F_RST_N == 1'b0) begin
rd_pointer <= 0;
rd_pointer_int <= 0;
end
else if (ram_en) begin
rd_pointer <= rd_pointer_nxt;
rd_pointer_int <= rd_pointer_nxt[15:1] ^ rd_pointer_nxt[14:0];
end
end
assign rd_pointer_nxt = (rd_pointer == counter_max) ? (0) : (rd_pointer + 1'b1);
always @(posedge fifo_wrclk or negedge F_RST_N)
begin
if (F_RST_N == 1'b0) begin
wr_pointer <= 0;
wr_pointer_int <= 0;
end
else if (ram_we) begin
wr_pointer <= wr_pointer_nxt;
wr_pointer_int <= wr_pointer_nxt[15:1] ^ wr_pointer_nxt[14:0];
end
end
assign wr_pointer_nxt = (wr_pointer == counter_max) ? (0) : (wr_pointer + 1'b1);
// Address synchronizers
reg [15:0] rd_pointer_sync, wr_pointer_sync;
reg [15:0] rd_pointer_sync_0, rd_pointer_sync_1;
reg [15:0] wr_pointer_sync_0, wr_pointer_sync_1;
always @(posedge fifo_rdclk or negedge F_RST_N)
begin
if (F_RST_N == 1'b0) begin
wr_pointer_sync_0 <= 0;
wr_pointer_sync_1 <= 0;
end
else begin
wr_pointer_sync_0 <= wraddr;
wr_pointer_sync_1 <= wr_pointer_sync_0;
end
end
always @(posedge fifo_wrclk or negedge F_RST_N)
begin
if (F_RST_N == 1'b0) begin
rd_pointer_sync_0 <= 0;
rd_pointer_sync_1 <= 0;
end
else begin
rd_pointer_sync_0 <= rdaddr;
rd_pointer_sync_1 <= rd_pointer_sync_0;
end
end
always @(*) begin
fifo_wraddr = {wr_pointer[tp-1:0], {(15-tp){1'b0}}};
fifo_rdaddr = {rd_pointer[tp-1:0], {(15-tp){1'b0}}};
rdaddr = {rd_pointer[tp], rd_pointer_int[tp-1:0]};
wraddr = {{(15-tp){1'b0}}, wr_pointer[tp], wr_pointer_int[tp:0]};
if (FIFO_MODE == "ASYNC")
fifo_full = (wraddr[tp-2:0] == rd_pointer_sync_1[tp-2:0] ) && (wraddr[tp] != rd_pointer_sync_1[tp] ) && ( wraddr[tp-1] != rd_pointer_sync_1[tp-1] );
else
fifo_full = (wr_pointer[tp-1:0] == rd_pointer[tp-1:0]) && (wr_pointer[tp] ^ rd_pointer[tp]);
if (FIFO_MODE == "ASYNC")
fifo_empty = (wr_pointer_sync_1[tp:0] == rdaddr[tp:0]);
else
fifo_empty = (wr_pointer[tp:0] == rd_pointer[tp:0]);
rd_pointer_cmp = (FIFO_MODE == "ASYNC") ? rd_pointer_sync : rd_pointer;
if (wr_pointer[tp] == rd_pointer_cmp[tp])
fifo_almost_full = ((wr_pointer[tp-1:0] - rd_pointer_cmp[tp-1:0]) >= (sram_depth - almost_full_offset));
else
fifo_almost_full = ((rd_pointer_cmp[tp-1:0] - wr_pointer[tp-1:0]) <= almost_full_offset);
wr_pointer_cmp = (FIFO_MODE == "ASYNC") ? wr_pointer_sync : wr_pointer;
if (wr_pointer_cmp[tp] == rd_pointer[tp])
fifo_almost_empty = ((wr_pointer_cmp[tp-1:0] - rd_pointer[tp-1:0]) <= almost_empty_offset);
else
fifo_almost_empty = ((rd_pointer[tp-1:0] - wr_pointer_cmp[tp-1:0]) >= (sram_depth - almost_empty_offset));
end
generate
always @(*) begin
wr_pointer_sync = 0;
rd_pointer_sync = 0;
for (i=tp; i >= 0; i=i-1) begin
if (i == tp) begin
wr_pointer_sync[i] = wr_pointer_sync_1[i];
rd_pointer_sync[i] = rd_pointer_sync_1[i];
end
else begin
wr_pointer_sync[i] = wr_pointer_sync_1[i] ^ wr_pointer_sync[i+1];
rd_pointer_sync[i] = rd_pointer_sync_1[i] ^ rd_pointer_sync[i+1];
end
end
end
if (RAM_MODE == "SDP") begin
// SDP push ports A+B
always @(posedge fifo_wrclk)
begin
for (k=0; k < A_WIDTH; k=k+1) begin
if (k < 40) begin
if (ram_we && A_BM[k]) memory[fifo_wraddr+k] <= A_DI[k];
end
else begin // use both ports
if (ram_we && B_BM[k-40]) memory[fifo_wraddr+k] <= B_DI[k-40];
end
end
end
// SDP pop ports A+B
always @(posedge fifo_rdclk)
begin
for (k=0; k < B_WIDTH; k=k+1) begin
if (k < 40) begin
if (ram_en) A_DO_out[k] <= memory[fifo_rdaddr+k];
end
else begin // use both ports
if (ram_en) B_DO_out[k-40] <= memory[fifo_rdaddr+k];
end
end
end
end
else if (RAM_MODE == "TDP") begin
// TDP pop port A
always @(posedge fifo_rdclk)
begin
for (i=0; i < A_WIDTH; i=i+1) begin
if (ram_en) begin
A_DO_out[i] <= memory[fifo_rdaddr+i];
end
end
end
// TDP push port B
always @(posedge fifo_wrclk)
begin
for (i=0; i < B_WIDTH; i=i+1) begin
if (ram_we && B_BM[i])
memory[fifo_wraddr+i] <= B_DI[i];
end
end
end
endgenerate
// Optional output register
generate
if (A_DO_REG) begin
always @(posedge fifo_rdclk) begin
A_DO_reg <= A_DO_out;
end
assign A_DO = A_DO_reg;
end
else begin
assign A_DO = A_DO_out;
end
if (B_DO_REG) begin
always @(posedge fifo_rdclk) begin
B_DO_reg <= B_DO_out;
end
assign B_DO = B_DO_reg;
end
else begin
assign B_DO = B_DO_out;
end
endgenerate
endmodule
// Models of the LUT2 tree primitives
module CC_L2T4(
output O,
input I0, I1, I2, I3
);
parameter [3:0] INIT_L00 = 4'b0000;
parameter [3:0] INIT_L01 = 4'b0000;
parameter [3:0] INIT_L10 = 4'b0000;
wire [1:0] l00_s1 = I1 ? INIT_L00[3:2] : INIT_L00[1:0];
wire l00 = I0 ? l00_s1[1] : l00_s1[0];
wire [1:0] l01_s1 = I3 ? INIT_L01[3:2] : INIT_L01[1:0];
wire l01 = I2 ? l01_s1[1] : l01_s1[0];
wire [1:0] l10_s1 = l01 ? INIT_L10[3:2] : INIT_L10[1:0];
assign O = l00 ? l10_s1[1] : l10_s1[0];
endmodule
module CC_L2T5(
output O,
input I0, I1, I2, I3, I4
);
parameter [3:0] INIT_L02 = 4'b0000;
parameter [3:0] INIT_L03 = 4'b0000;
parameter [3:0] INIT_L11 = 4'b0000;
parameter [3:0] INIT_L20 = 4'b0000;
wire [1:0] l02_s1 = I1 ? INIT_L02[3:2] : INIT_L02[1:0];
wire l02 = I0 ? l02_s1[1] : l02_s1[0];
wire [1:0] l03_s1 = I3 ? INIT_L03[3:2] : INIT_L03[1:0];
wire l03 = I2 ? l03_s1[1] : l03_s1[0];
wire [1:0] l11_s1 = l03 ? INIT_L11[3:2] : INIT_L11[1:0];
wire l11 = l02 ? l11_s1[1] : l11_s1[0];
wire [1:0] l20_s1 = l11 ? INIT_L20[3:2] : INIT_L20[1:0];
assign O = I4 ? l20_s1[1] : l20_s1[0];
endmodule
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