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[/] [dmt_tx/] [trunk/] [const_encoder/] [rtl/] [generic_dpram.v] - Blame information for rev 23

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//////////////////////////////////////////////////////////////////////
////                                                              ////
////  Generic Dual-Port Synchronous RAM                           ////
////                                                              ////
////  This file is part of memory library available from          ////
////  http://www.opencores.org/cvsweb.shtml/generic_memories/     ////
////                                                              ////
////  Description                                                 ////
////  This block is a wrapper with common dual-port               ////
////  synchronous memory interface for different                  ////
////  types of ASIC and FPGA RAMs. Beside universal memory        ////
////  interface it also provides behavioral model of generic      ////
////  dual-port synchronous RAM.                                  ////
////  It also contains a fully synthesizeable model for FPGAs.    ////
////  It should be used in all OPENCORES designs that want to be  ////
////  portable accross different target technologies and          ////
////  independent of target memory.                               ////
////                                                              ////
////  Supported ASIC RAMs are:                                    ////
////  - Artisan Dual-Port Sync RAM                                ////
////  - Avant! Two-Port Sync RAM (*)                              ////
////  - Virage 2-port Sync RAM                                    ////
////                                                              ////
////  Supported FPGA RAMs are:                                    ////
////  - Generic FPGA (VENDOR_FPGA)                                ////
////    Tested RAMs: Altera, Xilinx                               ////
////    Synthesis tools: LeonardoSpectrum, Synplicity             ////
////  - Xilinx (VENDOR_XILINX)                                    ////
////  - Altera (VENDOR_ALTERA)                                    ////
////                                                              ////
////  To Do:                                                      ////
////   - fix Avant!                                               ////
////   - add additional RAMs (VS etc)                             ////
////                                                              ////
////  Author(s):                                                  ////
////      - Richard Herveille, richard@asics.ws                   ////
////      - Damjan Lampret, lampret@opencores.org                 ////
////                                                              ////
//////////////////////////////////////////////////////////////////////
////                                                              ////
//// Copyright (C) 2000 Authors and OPENCORES.ORG                 ////
////                                                              ////
//// This source file may be used and distributed without         ////
//// restriction provided that this copyright statement is not    ////
//// removed from the file and that any derivative work contains  ////
//// the original copyright notice and the associated disclaimer. ////
////                                                              ////
//// This source file is free software; you can redistribute it   ////
//// and/or modify it under the terms of the GNU Lesser General   ////
//// Public License as published by the Free Software Foundation; ////
//// either version 2.1 of the License, or (at your option) any   ////
//// later version.                                               ////
////                                                              ////
//// This source is distributed in the hope that it will be       ////
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
//// PURPOSE.  See the GNU Lesser General Public License for more ////
//// details.                                                     ////
////                                                              ////
//// You should have received a copy of the GNU Lesser General    ////
//// Public License along with this source; if not, download it   ////
//// from http://www.opencores.org/lgpl.shtml                     ////
////                                                              ////
//////////////////////////////////////////////////////////////////////
//
// CVS Revision History
//
// $Log: not supported by cvs2svn $
// Revision 1.4  2002/09/28 08:18:52  rherveille
// Changed synthesizeable FPGA memory implementation.
// Fixed some issues with Xilinx BlockRAM
//
// Revision 1.3  2001/11/09 00:34:18  samg
// minor changes: unified with all common rams
//
// Revision 1.2  2001/11/08 19:11:31  samg
// added valid checks to behvioral model
//
// Revision 1.1.1.1  2001/09/14 09:57:10  rherveille
// Major cleanup.
// Files are now compliant to Altera & Xilinx memories.
// Memories are now compatible, i.e. drop-in replacements.
// Added synthesizeable generic FPGA description.
// Created "generic_memories" cvs entry.
//
// Revision 1.1.1.2  2001/08/21 13:09:27  damjan
// *** empty log message ***
//
// Revision 1.1  2001/08/20 18:23:20  damjan
// Initial revision
//
// Revision 1.1  2001/08/09 13:39:33  lampret
// Major clean-up.
//
// Revision 1.2  2001/07/30 05:38:02  lampret
// Adding empty directories required by HDL coding guidelines
//
//
 
//`include "timescale.v"
//
`include "defs.vh"
 
//`define VENDOR_FPGA
//`define VENDOR_XILINX
//`define VENDOR_ALTERA
 
module generic_dpram(
        // Generic synchronous dual-port RAM interface
        rclk, rrst, rce, oe, raddr, do,
        wclk, wrst, wce, we, waddr, di
);
 
        //
        // Default address and data buses width
        //
        parameter aw = 5;  // number of bits in address-bus
        parameter dw = 16; // number of bits in data-bus
 
        //
        // Generic synchronous double-port RAM interface
        //
        // read port
        input           rclk;  // read clock, rising edge trigger
        input           rrst;  // read port reset, active high
        input           rce;   // read port chip enable, active high
        input           oe;        // output enable, active high
        input  [aw-1:0] raddr; // read address
        output [dw-1:0] do;    // data output
 
        // write port
        input          wclk;  // write clock, rising edge trigger
        input          wrst;  // write port reset, active high
        input          wce;   // write port chip enable, active high
        input          we;    // write enable, active high
        input [aw-1:0] waddr; // write address
        input [dw-1:0] di;    // data input
 
        //
        // Module body
        //
 
`ifdef VENDOR_FPGA
        //
        // Instantiation synthesizeable FPGA memory
        //
        // This code has been tested using LeonardoSpectrum and Synplicity.
        // The code correctly instantiates Altera EABs and Xilinx BlockRAMs.
        //
        reg [dw-1:0] mem [(1<<aw) -1:0]; // instantiate memory
        reg [aw-1:0] ra;                 // register read address
 
        // read operation
        always @(posedge rclk)
          if (rce)
            ra <= #1 raddr;
 
        assign do = mem[ra];
 
        // write operation
        always@(posedge wclk)
                if (we && wce)
                        mem[waddr] <= #1 di;
 
`else
 
`ifdef VENDOR_XILINX
        //
        // Instantiation of FPGA memory:
        //
        // Virtex/Spartan2 BlockRAMs
        //
        xilinx_ram_dp xilinx_ram(
                // read port
                .CLKA(rclk),
                .RSTA(rrst),
                .ENA(rce),
                .ADDRA(raddr),
                .DIA( {dw{1'b0}} ),
                .WEA(1'b0),
                .DOA(do),
 
                // write port
                .CLKB(wclk),
                .RSTB(wrst),
                .ENB(wce),
                .ADDRB(waddr),
                .DIB(di),
                .WEB(we),
                .DOB()
        );
 
        defparam
                xilinx_ram.dwidth = dw,
                xilinx_ram.awidth = aw;
 
`else
 
`ifdef VENDOR_ALTERA
        //
        // Instantiation of FPGA memory:
        //
        // Altera FLEX/APEX EABs
        //
        altera_ram_dp altera_ram(
                // read port
                .rdclock(rclk),
                .rdclocken(rce),
                .rdaddress(raddr),
                .q(do),
 
                // write port
                .wrclock(wclk),
                .wrclocken(wce),
                .wren(we),
                .wraddress(waddr),
                .data(di)
        );
 
        defparam
                altera_ram.dwidth = dw,
                altera_ram.awidth = aw;
 
`else
 
`ifdef VENDOR_ARTISAN
 
        //
        // Instantiation of ASIC memory:
        //
        // Artisan Synchronous Double-Port RAM (ra2sh)
        //
        art_hsdp #(dw, 1<<aw, aw) artisan_sdp(
                // read port
                .qa(do),
                .clka(rclk),
                .cena(~rce),
                .wena(1'b1),
                .aa(raddr),
                .da( {dw{1'b0}} ),
                .oena(~oe),
 
                // write port
                .qb(),
                .clkb(wclk),
                .cenb(~wce),
                .wenb(~we),
                .ab(waddr),
                .db(di),
                .oenb(1'b1)
        );
 
`else
 
`ifdef VENDOR_AVANT
 
        //
        // Instantiation of ASIC memory:
        //
        // Avant! Asynchronous Two-Port RAM
        //
        avant_atp avant_atp(
                .web(~we),
                .reb(),
                .oeb(~oe),
                .rcsb(),
                .wcsb(),
                .ra(raddr),
                .wa(waddr),
                .di(di),
                .do(do)
        );
 
`else
 
`ifdef VENDOR_VIRAGE
 
        //
        // Instantiation of ASIC memory:
        //
        // Virage Synchronous 2-port R/W RAM
        //
        virage_stp virage_stp(
                // read port
                .CLKA(rclk),
                .MEA(rce_a),
                .ADRA(raddr),
                .DA( {dw{1'b0}} ),
                .WEA(1'b0),
                .OEA(oe),
                .QA(do),
 
                // write port
                .CLKB(wclk),
                .MEB(wce),
                .ADRB(waddr),
                .DB(di),
                .WEB(we),
                .OEB(1'b1),
                .QB()
        );
 
`else
 
        //
        // Generic dual-port synchronous RAM model
        //
 
        //
        // Generic RAM's registers and wires
        //
        reg     [dw-1:0] mem [(1<<aw)-1:0]; // RAM content
        reg     [dw-1:0] do_reg;            // RAM data output register
 
        //
        // Data output drivers
        //
        assign do = (oe & rce) ? do_reg : {dw{1'bz}};
 
        // read operation
        always @(posedge rclk)
                if (rce)
                        do_reg <= #1 (we && (waddr==raddr)) ? {dw{1'b x}} : mem[raddr];
 
        // write operation
        always @(posedge wclk)
                if (wce && we)
                        mem[waddr] <= #1 di;
 
 
        // Task prints range of memory
        // *** Remember that tasks are non reentrant, don't call this task in parallel for multiple instantiations.
        task print_ram;
        input [aw-1:0] start;
        input [aw-1:0] finish;
        integer rnum;
        begin
                for (rnum=start;rnum<=finish;rnum=rnum+1)
                        $display("Addr %h = %h",rnum,mem[rnum]);
        end
        endtask
 
`endif // !VENDOR_VIRAGE
`endif // !VENDOR_AVANT
`endif // !VENDOR_ARTISAN
`endif // !VENDOR_ALTERA
`endif // !VENDOR_XILINX
`endif // !VENDOR_FPGA
 
endmodule
 
//
// Black-box modules
//
 
`ifdef VENDOR_ALTERA
        module altera_ram_dp(
                data,
                wraddress,
                rdaddress,
                wren,
                wrclock,
                wrclocken,
                rdclock,
                rdclocken,
                q) /* synthesis black_box */;
 
                parameter awidth = 7;
                parameter dwidth = 8;
 
                input [dwidth -1:0] data;
                input [awidth -1:0] wraddress;
                input [awidth -1:0] rdaddress;
                input               wren;
                input               wrclock;
                input               wrclocken;
                input               rdclock;
                input               rdclocken;
                output [dwidth -1:0] q;
 
                // synopsis translate_off
                // exemplar translate_off
 
                syn_dpram_rowr #(
                        "UNUSED",
                        dwidth,
                        awidth,
                        1 << awidth
                )
                altera_dpram_model (
                        // read port
                        .RdClock(rdclock),
                        .RdClken(rdclocken),
                        .RdAddress(rdaddress),
                        .RdEn(1'b1),
                        .Q(q),
 
                        // write port
                        .WrClock(wrclock),
                        .WrClken(wrclocken),
                        .WrAddress(wraddress),
                        .WrEn(wren),
                        .Data(data)
                );
 
                // exemplar translate_on
                // synopsis translate_on
 
        endmodule
`endif // VENDOR_ALTERA
 
`ifdef VENDOR_XILINX
        module xilinx_ram_dp (
                ADDRA,
                CLKA,
                ADDRB,
                CLKB,
                DIA,
                WEA,
                DIB,
                WEB,
                ENA,
                ENB,
                RSTA,
                RSTB,
                DOA,
                DOB) /* synthesis black_box */ ;
 
        parameter awidth = 7;
        parameter dwidth = 8;
 
        // port_a
        input               CLKA;
        input               RSTA;
        input               ENA;
        input [awidth-1:0]  ADDRA;
        input [dwidth-1:0]  DIA;
        input               WEA;
        output [dwidth-1:0] DOA;
 
        // port_b
        input               CLKB;
        input               RSTB;
        input               ENB;
        input [awidth-1:0]  ADDRB;
        input [dwidth-1:0]  DIB;
        input               WEB;
        output [dwidth-1:0] DOB;
 
        // insert simulation model
 
 
        // synopsys translate_off
        // exemplar translate_off
 
        C_MEM_DP_BLOCK_V1_0 #(
                awidth,
                awidth,
                1,
                1,
                "0",
                1 << awidth,
                1 << awidth,
                1,
                1,
                1,
                1,
                1,
                1,
                1,
                1,
                1,
                1,
                1,
                1,
                1,
                "",
                16,
                0,
                0,
                1,
                1,
                1,
                1,
                dwidth,
                dwidth)
        xilinx_dpram_model (
                .ADDRA(ADDRA),
                .CLKA(CLKA),
                .ADDRB(ADDRB),
                .CLKB(CLKB),
                .DIA(DIA),
                .WEA(WEA),
                .DIB(DIB),
                .WEB(WEB),
                .ENA(ENA),
                .ENB(ENB),
                .RSTA(RSTA),
                .RSTB(RSTB),
                .DOA(DOA),
                .DOB(DOB));
 
                // exemplar translate_on
                // synopsys translate_on
 
        endmodule
`endif // VENDOR_XILINX

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[/] [dmt_tx/] [trunk/] [const_encoder/] [rtl/] [generic_dpram.v] - Blame information for rev 23

Line No.	Rev	Author	Line
1	10	dannori	`//////////////////////////////////////////////////////////////////////`
2			`//// ////`
3			`//// Generic Dual-Port Synchronous RAM ////`
4			`//// ////`
5			`//// This file is part of memory library available from ////`
6			`//// http://www.opencores.org/cvsweb.shtml/generic_memories/ ////`
7			`//// ////`
8			`//// Description ////`
9			`//// This block is a wrapper with common dual-port ////`
10			`//// synchronous memory interface for different ////`
11			`//// types of ASIC and FPGA RAMs. Beside universal memory ////`
12			`//// interface it also provides behavioral model of generic ////`
13			`//// dual-port synchronous RAM. ////`
14			`//// It also contains a fully synthesizeable model for FPGAs. ////`
15			`//// It should be used in all OPENCORES designs that want to be ////`
16			`//// portable accross different target technologies and ////`
17			`//// independent of target memory. ////`
18			`//// ////`
19			`//// Supported ASIC RAMs are: ////`
20			`//// - Artisan Dual-Port Sync RAM ////`
21			`//// - Avant! Two-Port Sync RAM (*) ////`
22			`//// - Virage 2-port Sync RAM ////`
23			`//// ////`
24			`//// Supported FPGA RAMs are: ////`
25			`//// - Generic FPGA (VENDOR_FPGA) ////`
26			`//// Tested RAMs: Altera, Xilinx ////`
27			`//// Synthesis tools: LeonardoSpectrum, Synplicity ////`
28			`//// - Xilinx (VENDOR_XILINX) ////`
29			`//// - Altera (VENDOR_ALTERA) ////`
30			`//// ////`
31			`//// To Do: ////`
32			`//// - fix Avant! ////`
33			`//// - add additional RAMs (VS etc) ////`
34			`//// ////`
35			`//// Author(s): ////`
36			`//// - Richard Herveille, richard@asics.ws ////`
37			`//// - Damjan Lampret, lampret@opencores.org ////`
38			`//// ////`
39			`//////////////////////////////////////////////////////////////////////`
40			`//// ////`
41			`//// Copyright (C) 2000 Authors and OPENCORES.ORG ////`
42			`//// ////`
43			`//// This source file may be used and distributed without ////`
44			`//// restriction provided that this copyright statement is not ////`
45			`//// removed from the file and that any derivative work contains ////`
46			`//// the original copyright notice and the associated disclaimer. ////`
47			`//// ////`
48			`//// This source file is free software; you can redistribute it ////`
49			`//// and/or modify it under the terms of the GNU Lesser General ////`
50			`//// Public License as published by the Free Software Foundation; ////`
51			`//// either version 2.1 of the License, or (at your option) any ////`
52			`//// later version. ////`
53			`//// ////`
54			`//// This source is distributed in the hope that it will be ////`
55			`//// useful, but WITHOUT ANY WARRANTY; without even the implied ////`
56			`//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////`
57			`//// PURPOSE. See the GNU Lesser General Public License for more ////`
58			`//// details. ////`
59			`//// ////`
60			`//// You should have received a copy of the GNU Lesser General ////`
61			`//// Public License along with this source; if not, download it ////`
62			`//// from http://www.opencores.org/lgpl.shtml ////`
63			`//// ////`
64			`//////////////////////////////////////////////////////////////////////`
65			`//`
66			`// CVS Revision History`
67			`//`
68			`// $Log: not supported by cvs2svn $`
69			`// Revision 1.4 2002/09/28 08:18:52 rherveille`
70			`// Changed synthesizeable FPGA memory implementation.`
71			`// Fixed some issues with Xilinx BlockRAM`
72			`//`
73			`// Revision 1.3 2001/11/09 00:34:18 samg`
74			`// minor changes: unified with all common rams`
75			`//`
76			`// Revision 1.2 2001/11/08 19:11:31 samg`
77			`// added valid checks to behvioral model`
78			`//`
79			`// Revision 1.1.1.1 2001/09/14 09:57:10 rherveille`
80			`// Major cleanup.`
81			`// Files are now compliant to Altera & Xilinx memories.`
82			`// Memories are now compatible, i.e. drop-in replacements.`
83			`// Added synthesizeable generic FPGA description.`
84			`// Created "generic_memories" cvs entry.`
85			`//`
86			`// Revision 1.1.1.2 2001/08/21 13:09:27 damjan`
87			`// * empty log message *`
88			`//`
89			`// Revision 1.1 2001/08/20 18:23:20 damjan`
90			`// Initial revision`
91			`//`
92			`// Revision 1.1 2001/08/09 13:39:33 lampret`
93			`// Major clean-up.`
94			`//`
95			`// Revision 1.2 2001/07/30 05:38:02 lampret`
96			`// Adding empty directories required by HDL coding guidelines`
97			`//`
98			`//`
99
100			//`include "timescale.v"
101			`//`
102			`include "defs.vh"
103
104			//`define VENDOR_FPGA
105			//`define VENDOR_XILINX
106			//`define VENDOR_ALTERA
107
108			`module generic_dpram(`
109			`// Generic synchronous dual-port RAM interface`
110			`rclk, rrst, rce, oe, raddr, do,`
111			`wclk, wrst, wce, we, waddr, di`
112			`);`
113
114			`//`
115			`// Default address and data buses width`
116			`//`
117			`parameter aw = 5; // number of bits in address-bus`
118			`parameter dw = 16; // number of bits in data-bus`
119
120			`//`
121			`// Generic synchronous double-port RAM interface`
122			`//`
123			`// read port`
124			`input rclk; // read clock, rising edge trigger`
125			`input rrst; // read port reset, active high`
126			`input rce; // read port chip enable, active high`
127			`input oe; // output enable, active high`
128			`input [aw-1:0] raddr; // read address`
129			`output [dw-1:0] do; // data output`
130
131			`// write port`
132			`input wclk; // write clock, rising edge trigger`
133			`input wrst; // write port reset, active high`
134			`input wce; // write port chip enable, active high`
135			`input we; // write enable, active high`
136			`input [aw-1:0] waddr; // write address`
137			`input [dw-1:0] di; // data input`
138
139			`//`
140			`// Module body`
141			`//`
142
143			`ifdef VENDOR_FPGA
144			`//`
145			`// Instantiation synthesizeable FPGA memory`
146			`//`
147			`// This code has been tested using LeonardoSpectrum and Synplicity.`
148			`// The code correctly instantiates Altera EABs and Xilinx BlockRAMs.`
149			`//`
150			`reg [dw-1:0] mem [(1<<aw) -1:0]; // instantiate memory`
151			`reg [aw-1:0] ra; // register read address`
152
153			`// read operation`
154			`always @(posedge rclk)`
155			`if (rce)`
156			`ra <= #1 raddr;`
157
158			`assign do = mem[ra];`
159
160			`// write operation`
161			`always@(posedge wclk)`
162			`if (we && wce)`
163			`mem[waddr] <= #1 di;`
164
165			`else
166
167			`ifdef VENDOR_XILINX
168			`//`
169			`// Instantiation of FPGA memory:`
170			`//`
171			`// Virtex/Spartan2 BlockRAMs`
172			`//`
173			`xilinx_ram_dp xilinx_ram(`
174			`// read port`
175			`.CLKA(rclk),`
176			`.RSTA(rrst),`
177			`.ENA(rce),`
178			`.ADDRA(raddr),`
179			`.DIA( {dw{1'b0}} ),`
180			`.WEA(1'b0),`
181			`.DOA(do),`
182
183			`// write port`
184			`.CLKB(wclk),`
185			`.RSTB(wrst),`
186			`.ENB(wce),`
187			`.ADDRB(waddr),`
188			`.DIB(di),`
189			`.WEB(we),`
190			`.DOB()`
191			`);`
192
193			`defparam`
194			`xilinx_ram.dwidth = dw,`
195			`xilinx_ram.awidth = aw;`
196
197			`else
198
199			`ifdef VENDOR_ALTERA
200			`//`
201			`// Instantiation of FPGA memory:`
202			`//`
203			`// Altera FLEX/APEX EABs`
204			`//`
205			`altera_ram_dp altera_ram(`
206			`// read port`
207			`.rdclock(rclk),`
208			`.rdclocken(rce),`
209			`.rdaddress(raddr),`
210			`.q(do),`
211
212			`// write port`
213			`.wrclock(wclk),`
214			`.wrclocken(wce),`
215			`.wren(we),`
216			`.wraddress(waddr),`
217			`.data(di)`
218			`);`
219
220			`defparam`
221			`altera_ram.dwidth = dw,`
222			`altera_ram.awidth = aw;`
223
224			`else
225
226			`ifdef VENDOR_ARTISAN
227
228			`//`
229			`// Instantiation of ASIC memory:`
230			`//`
231			`// Artisan Synchronous Double-Port RAM (ra2sh)`
232			`//`
233			`art_hsdp #(dw, 1<<aw, aw) artisan_sdp(`
234			`// read port`
235			`.qa(do),`
236			`.clka(rclk),`
237			`.cena(~rce),`
238			`.wena(1'b1),`
239			`.aa(raddr),`
240			`.da( {dw{1'b0}} ),`
241			`.oena(~oe),`
242
243			`// write port`
244			`.qb(),`
245			`.clkb(wclk),`
246			`.cenb(~wce),`
247			`.wenb(~we),`
248			`.ab(waddr),`
249			`.db(di),`
250			`.oenb(1'b1)`
251			`);`
252
253			`else
254
255			`ifdef VENDOR_AVANT
256
257			`//`
258			`// Instantiation of ASIC memory:`
259			`//`
260			`// Avant! Asynchronous Two-Port RAM`
261			`//`
262			`avant_atp avant_atp(`
263			`.web(~we),`
264			`.reb(),`
265			`.oeb(~oe),`
266			`.rcsb(),`
267			`.wcsb(),`
268			`.ra(raddr),`
269			`.wa(waddr),`
270			`.di(di),`
271			`.do(do)`
272			`);`
273
274			`else
275
276			`ifdef VENDOR_VIRAGE
277
278			`//`
279			`// Instantiation of ASIC memory:`
280			`//`
281			`// Virage Synchronous 2-port R/W RAM`
282			`//`
283			`virage_stp virage_stp(`
284			`// read port`
285			`.CLKA(rclk),`
286			`.MEA(rce_a),`
287			`.ADRA(raddr),`
288			`.DA( {dw{1'b0}} ),`
289			`.WEA(1'b0),`
290			`.OEA(oe),`
291			`.QA(do),`
292
293			`// write port`
294			`.CLKB(wclk),`
295			`.MEB(wce),`
296			`.ADRB(waddr),`
297			`.DB(di),`
298			`.WEB(we),`
299			`.OEB(1'b1),`
300			`.QB()`
301			`);`
302
303			`else
304
305			`//`
306			`// Generic dual-port synchronous RAM model`
307			`//`
308
309			`//`
310			`// Generic RAM's registers and wires`
311			`//`
312			`reg [dw-1:0] mem [(1<<aw)-1:0]; // RAM content`
313			`reg [dw-1:0] do_reg; // RAM data output register`
314
315			`//`
316			`// Data output drivers`
317			`//`
318			`assign do = (oe & rce) ? do_reg : {dw{1'bz}};`
319
320			`// read operation`
321			`always @(posedge rclk)`
322			`if (rce)`
323			`do_reg <= #1 (we && (waddr==raddr)) ? {dw{1'b x}} : mem[raddr];`
324
325			`// write operation`
326			`always @(posedge wclk)`
327			`if (wce && we)`
328			`mem[waddr] <= #1 di;`
329
330
331			`// Task prints range of memory`
332			`// *** Remember that tasks are non reentrant, don't call this task in parallel for multiple instantiations.`
333			`task print_ram;`
334			`input [aw-1:0] start;`
335			`input [aw-1:0] finish;`
336			`integer rnum;`
337			`begin`
338			`for (rnum=start;rnum<=finish;rnum=rnum+1)`
339			`$display("Addr %h = %h",rnum,mem[rnum]);`
340			`end`
341			`endtask`
342
343			`endif // !VENDOR_VIRAGE
344			`endif // !VENDOR_AVANT
345			`endif // !VENDOR_ARTISAN
346			`endif // !VENDOR_ALTERA
347			`endif // !VENDOR_XILINX
348			`endif // !VENDOR_FPGA
349
350			`endmodule`
351
352			`//`
353			`// Black-box modules`
354			`//`
355
356			`ifdef VENDOR_ALTERA
357			`module altera_ram_dp(`
358			`data,`
359			`wraddress,`
360			`rdaddress,`
361			`wren,`
362			`wrclock,`
363			`wrclocken,`
364			`rdclock,`
365			`rdclocken,`
366			`q) /* synthesis black_box */;`
367
368			`parameter awidth = 7;`
369			`parameter dwidth = 8;`
370
371			`input [dwidth -1:0] data;`
372			`input [awidth -1:0] wraddress;`
373			`input [awidth -1:0] rdaddress;`
374			`input wren;`
375			`input wrclock;`
376			`input wrclocken;`
377			`input rdclock;`
378			`input rdclocken;`
379			`output [dwidth -1:0] q;`
380
381			`// synopsis translate_off`
382			`// exemplar translate_off`
383
384			`syn_dpram_rowr #(`
385			`"UNUSED",`
386			`dwidth,`
387			`awidth,`
388			`1 << awidth`
389			`)`
390			`altera_dpram_model (`
391			`// read port`
392			`.RdClock(rdclock),`
393			`.RdClken(rdclocken),`
394			`.RdAddress(rdaddress),`
395			`.RdEn(1'b1),`
396			`.Q(q),`
397
398			`// write port`
399			`.WrClock(wrclock),`
400			`.WrClken(wrclocken),`
401			`.WrAddress(wraddress),`
402			`.WrEn(wren),`
403			`.Data(data)`
404			`);`
405
406			`// exemplar translate_on`
407			`// synopsis translate_on`
408
409			`endmodule`
410			`endif // VENDOR_ALTERA
411
412			`ifdef VENDOR_XILINX
413			`module xilinx_ram_dp (`
414			`ADDRA,`
415			`CLKA,`
416			`ADDRB,`
417			`CLKB,`
418			`DIA,`
419			`WEA,`
420			`DIB,`
421			`WEB,`
422			`ENA,`
423			`ENB,`
424			`RSTA,`
425			`RSTB,`
426			`DOA,`
427			`DOB) /* synthesis black_box */ ;`
428
429			`parameter awidth = 7;`
430			`parameter dwidth = 8;`
431
432			`// port_a`
433			`input CLKA;`
434			`input RSTA;`
435			`input ENA;`
436			`input [awidth-1:0] ADDRA;`
437			`input [dwidth-1:0] DIA;`
438			`input WEA;`
439			`output [dwidth-1:0] DOA;`
440
441			`// port_b`
442			`input CLKB;`
443			`input RSTB;`
444			`input ENB;`
445			`input [awidth-1:0] ADDRB;`
446			`input [dwidth-1:0] DIB;`
447			`input WEB;`
448			`output [dwidth-1:0] DOB;`
449
450			`// insert simulation model`
451
452
453			`// synopsys translate_off`
454			`// exemplar translate_off`
455
456			`C_MEM_DP_BLOCK_V1_0 #(`
457			`awidth,`
458			`awidth,`
459			`1,`
460			`1,`
461			`"0",`
462			`1 << awidth,`
463			`1 << awidth,`
464			`1,`
465			`1,`
466			`1,`
467			`1,`
468			`1,`
469			`1,`
470			`1,`
471			`1,`
472			`1,`
473			`1,`
474			`1,`
475			`1,`
476			`1,`
477			`"",`
478			`16,`
479			`0,`
480			`0,`
481			`1,`
482			`1,`
483			`1,`
484			`1,`
485			`dwidth,`
486			`dwidth)`
487			`xilinx_dpram_model (`
488			`.ADDRA(ADDRA),`
489			`.CLKA(CLKA),`
490			`.ADDRB(ADDRB),`
491			`.CLKB(CLKB),`
492			`.DIA(DIA),`
493			`.WEA(WEA),`
494			`.DIB(DIB),`
495			`.WEB(WEB),`
496			`.ENA(ENA),`
497			`.ENB(ENB),`
498			`.RSTA(RSTA),`
499			`.RSTB(RSTB),`
500			`.DOA(DOA),`
501			`.DOB(DOB));`
502
503			`// exemplar translate_on`
504			`// synopsys translate_on`
505
506			`endmodule`
507			`endif // VENDOR_XILINX