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authorPavel V. Shatov (Meister) <meisterpaul1@yandex.ru>2018-12-19 15:34:55 +0300
committerPavel V. Shatov (Meister) <meisterpaul1@yandex.ru>2018-12-19 15:41:00 +0300
commitc617c0c711620f58eb3ead22edcdfe57fed06088 (patch)
tree8c15184d5ca6403ea01843560394f6d909a0986f /rtl/curve/rom
parentea4d251c81c8b53e0bbc71cd1719dfea4d0517c1 (diff)
* Rewritten from scratch, uses the same hardware architecture as the Ed25519HEADmaster
core for better timing performance * Removed custom modular inversion sub-module, now uses micro-coded modular inversion routine based on Fermat's little theorem (~10% faster) * Uses math primitives from core/lib * Added randomized test vector (see user/shatov/ecdsa_fpga_model/test_vectors/)
Diffstat (limited to 'rtl/curve/rom')
-rw-r--r--rtl/curve/rom/brom_p256_delta.v68
-rw-r--r--rtl/curve/rom/brom_p256_g_x.v68
-rw-r--r--rtl/curve/rom/brom_p256_g_y.v68
-rw-r--r--rtl/curve/rom/brom_p256_h_x.v68
-rw-r--r--rtl/curve/rom/brom_p256_h_y.v68
-rw-r--r--rtl/curve/rom/brom_p256_one.v68
-rw-r--r--rtl/curve/rom/brom_p256_q.v68
-rw-r--r--rtl/curve/rom/brom_p256_zero.v70
8 files changed, 0 insertions, 546 deletions
diff --git a/rtl/curve/rom/brom_p256_delta.v b/rtl/curve/rom/brom_p256_delta.v
deleted file mode 100644
index 4637575..0000000
--- a/rtl/curve/rom/brom_p256_delta.v
+++ /dev/null
@@ -1,68 +0,0 @@
-//======================================================================
-//
-// Copyright (c) 2016, NORDUnet A/S All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions
-// are met:
-// - Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//
-// - Redistributions in binary form must reproduce the above copyright
-// notice, this list of conditions and the following disclaimer in the
-// documentation and/or other materials provided with the distribution.
-//
-// - Neither the name of the NORDUnet nor the names of its contributors may
-// be used to endorse or promote products derived from this software
-// without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
-// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
-// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
-// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-//======================================================================
-
-`timescale 1ns / 1ps
-
-module brom_p256_delta
- (
- input wire clk,
- input wire [ 3-1:0] b_addr,
- output wire [32-1:0] b_out
- );
-
-
- //
- // Output Registers
- //
- reg [31:0] bram_reg_b;
-
- assign b_out = bram_reg_b;
-
-
- //
- // Read-Only Port B
- //
- always @(posedge clk)
- //
- case (b_addr)
- 3'b000: bram_reg_b <= 32'h00000000;
- 3'b001: bram_reg_b <= 32'h00000000;
- 3'b010: bram_reg_b <= 32'h80000000;
- 3'b011: bram_reg_b <= 32'h00000000;
- 3'b100: bram_reg_b <= 32'h00000000;
- 3'b101: bram_reg_b <= 32'h80000000;
- 3'b110: bram_reg_b <= 32'h80000000;
- 3'b111: bram_reg_b <= 32'h7fffffff;
- endcase
-
-
-endmodule
diff --git a/rtl/curve/rom/brom_p256_g_x.v b/rtl/curve/rom/brom_p256_g_x.v
deleted file mode 100644
index 86aeafd..0000000
--- a/rtl/curve/rom/brom_p256_g_x.v
+++ /dev/null
@@ -1,68 +0,0 @@
-//======================================================================
-//
-// Copyright (c) 2016, NORDUnet A/S All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions
-// are met:
-// - Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//
-// - Redistributions in binary form must reproduce the above copyright
-// notice, this list of conditions and the following disclaimer in the
-// documentation and/or other materials provided with the distribution.
-//
-// - Neither the name of the NORDUnet nor the names of its contributors may
-// be used to endorse or promote products derived from this software
-// without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
-// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
-// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
-// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-//======================================================================
-
-`timescale 1ns / 1ps
-
-module brom_p256_g_x
- (
- input wire clk,
- input wire [ 3-1:0] b_addr,
- output wire [32-1:0] b_out
- );
-
-
- //
- // Output Registers
- //
- reg [31:0] bram_reg_b;
-
- assign b_out = bram_reg_b;
-
-
- //
- // Read-Only Port B
- //
- always @(posedge clk)
- //
- case (b_addr)
- 3'b000: bram_reg_b <= 32'hd898c296;
- 3'b001: bram_reg_b <= 32'hf4a13945;
- 3'b010: bram_reg_b <= 32'h2deb33a0;
- 3'b011: bram_reg_b <= 32'h77037d81;
- 3'b100: bram_reg_b <= 32'h63a440f2;
- 3'b101: bram_reg_b <= 32'hf8bce6e5;
- 3'b110: bram_reg_b <= 32'he12c4247;
- 3'b111: bram_reg_b <= 32'h6b17d1f2;
- endcase
-
-
-endmodule
diff --git a/rtl/curve/rom/brom_p256_g_y.v b/rtl/curve/rom/brom_p256_g_y.v
deleted file mode 100644
index 39f9116..0000000
--- a/rtl/curve/rom/brom_p256_g_y.v
+++ /dev/null
@@ -1,68 +0,0 @@
-//======================================================================
-//
-// Copyright (c) 2016, NORDUnet A/S All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions
-// are met:
-// - Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//
-// - Redistributions in binary form must reproduce the above copyright
-// notice, this list of conditions and the following disclaimer in the
-// documentation and/or other materials provided with the distribution.
-//
-// - Neither the name of the NORDUnet nor the names of its contributors may
-// be used to endorse or promote products derived from this software
-// without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
-// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
-// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
-// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-//======================================================================
-
-`timescale 1ns / 1ps
-
-module brom_p256_g_y
- (
- input wire clk,
- input wire [ 3-1:0] b_addr,
- output wire [32-1:0] b_out
- );
-
-
- //
- // Output Registers
- //
- reg [31:0] bram_reg_b;
-
- assign b_out = bram_reg_b;
-
-
- //
- // Read-Only Port B
- //
- always @(posedge clk)
- //
- case (b_addr)
- 3'b000: bram_reg_b <= 32'h37bf51f5;
- 3'b001: bram_reg_b <= 32'hcbb64068;
- 3'b010: bram_reg_b <= 32'h6b315ece;
- 3'b011: bram_reg_b <= 32'h2bce3357;
- 3'b100: bram_reg_b <= 32'h7c0f9e16;
- 3'b101: bram_reg_b <= 32'h8ee7eb4a;
- 3'b110: bram_reg_b <= 32'hfe1a7f9b;
- 3'b111: bram_reg_b <= 32'h4fe342e2;
- endcase
-
-
-endmodule
diff --git a/rtl/curve/rom/brom_p256_h_x.v b/rtl/curve/rom/brom_p256_h_x.v
deleted file mode 100644
index f426475..0000000
--- a/rtl/curve/rom/brom_p256_h_x.v
+++ /dev/null
@@ -1,68 +0,0 @@
-//======================================================================
-//
-// Copyright (c) 2016, NORDUnet A/S All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions
-// are met:
-// - Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//
-// - Redistributions in binary form must reproduce the above copyright
-// notice, this list of conditions and the following disclaimer in the
-// documentation and/or other materials provided with the distribution.
-//
-// - Neither the name of the NORDUnet nor the names of its contributors may
-// be used to endorse or promote products derived from this software
-// without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
-// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
-// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
-// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-//======================================================================
-
-`timescale 1ns / 1ps
-
-module brom_p256_h_x
- (
- input wire clk,
- input wire [ 3-1:0] b_addr,
- output wire [32-1:0] b_out
- );
-
-
- //
- // Output Registers
- //
- reg [31:0] bram_reg_b;
-
- assign b_out = bram_reg_b;
-
-
- //
- // Read-Only Port B
- //
- always @(posedge clk)
- //
- case (b_addr)
- 3'b000: bram_reg_b <= 32'h47669978;
- 3'b001: bram_reg_b <= 32'ha60b48fc;
- 3'b010: bram_reg_b <= 32'h77f21b35;
- 3'b011: bram_reg_b <= 32'hc08969e2;
- 3'b100: bram_reg_b <= 32'h04b51ac3;
- 3'b101: bram_reg_b <= 32'h8a523803;
- 3'b110: bram_reg_b <= 32'h8d034f7e;
- 3'b111: bram_reg_b <= 32'h7cf27b18;
- endcase
-
-
-endmodule
diff --git a/rtl/curve/rom/brom_p256_h_y.v b/rtl/curve/rom/brom_p256_h_y.v
deleted file mode 100644
index c75d0da..0000000
--- a/rtl/curve/rom/brom_p256_h_y.v
+++ /dev/null
@@ -1,68 +0,0 @@
-//======================================================================
-//
-// Copyright (c) 2016, NORDUnet A/S All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions
-// are met:
-// - Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//
-// - Redistributions in binary form must reproduce the above copyright
-// notice, this list of conditions and the following disclaimer in the
-// documentation and/or other materials provided with the distribution.
-//
-// - Neither the name of the NORDUnet nor the names of its contributors may
-// be used to endorse or promote products derived from this software
-// without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
-// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
-// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
-// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-//======================================================================
-
-`timescale 1ns / 1ps
-
-module brom_p256_h_y
- (
- input wire clk,
- input wire [ 3-1:0] b_addr,
- output wire [32-1:0] b_out
- );
-
-
- //
- // Output Registers
- //
- reg [31:0] bram_reg_b;
-
- assign b_out = bram_reg_b;
-
-
- //
- // Read-Only Port B
- //
- always @(posedge clk)
- //
- case (b_addr)
- 3'b000: bram_reg_b <= 32'h227873d1;
- 3'b001: bram_reg_b <= 32'h9e04b79d;
- 3'b010: bram_reg_b <= 32'h3ce98229;
- 3'b011: bram_reg_b <= 32'hba7dade6;
- 3'b100: bram_reg_b <= 32'h9f7430db;
- 3'b101: bram_reg_b <= 32'h293d9ac6;
- 3'b110: bram_reg_b <= 32'hdb8ed040;
- 3'b111: bram_reg_b <= 32'h07775510;
- endcase
-
-
-endmodule
diff --git a/rtl/curve/rom/brom_p256_one.v b/rtl/curve/rom/brom_p256_one.v
deleted file mode 100644
index 15e3746..0000000
--- a/rtl/curve/rom/brom_p256_one.v
+++ /dev/null
@@ -1,68 +0,0 @@
-//======================================================================
-//
-// Copyright (c) 2016, NORDUnet A/S All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions
-// are met:
-// - Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//
-// - Redistributions in binary form must reproduce the above copyright
-// notice, this list of conditions and the following disclaimer in the
-// documentation and/or other materials provided with the distribution.
-//
-// - Neither the name of the NORDUnet nor the names of its contributors may
-// be used to endorse or promote products derived from this software
-// without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
-// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
-// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
-// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-//======================================================================
-
-`timescale 1ns / 1ps
-
-module brom_p256_one
- (
- input wire clk,
- input wire [ 3-1:0] b_addr,
- output wire [32-1:0] b_out
- );
-
-
- //
- // Output Registers
- //
- reg [31:0] bram_reg_b;
-
- assign b_out = bram_reg_b;
-
-
- //
- // Read-Only Port B
- //
- always @(posedge clk)
- //
- case (b_addr)
- 3'b000: bram_reg_b <= 32'h00000001;
- 3'b001: bram_reg_b <= 32'h00000000;
- 3'b010: bram_reg_b <= 32'h00000000;
- 3'b011: bram_reg_b <= 32'h00000000;
- 3'b100: bram_reg_b <= 32'h00000000;
- 3'b101: bram_reg_b <= 32'h00000000;
- 3'b110: bram_reg_b <= 32'h00000000;
- 3'b111: bram_reg_b <= 32'h00000000;
- endcase
-
-
-endmodule
diff --git a/rtl/curve/rom/brom_p256_q.v b/rtl/curve/rom/brom_p256_q.v
deleted file mode 100644
index 101a524..0000000
--- a/rtl/curve/rom/brom_p256_q.v
+++ /dev/null
@@ -1,68 +0,0 @@
-//======================================================================
-//
-// Copyright (c) 2016, NORDUnet A/S All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions
-// are met:
-// - Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//
-// - Redistributions in binary form must reproduce the above copyright
-// notice, this list of conditions and the following disclaimer in the
-// documentation and/or other materials provided with the distribution.
-//
-// - Neither the name of the NORDUnet nor the names of its contributors may
-// be used to endorse or promote products derived from this software
-// without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
-// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
-// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
-// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-//======================================================================
-
-`timescale 1ns / 1ps
-
-module brom_p256_q
- (
- input wire clk,
- input wire [ 3-1:0] b_addr,
- output wire [32-1:0] b_out
- );
-
-
- //
- // Output Registers
- //
- reg [31:0] bram_reg_b;
-
- assign b_out = bram_reg_b;
-
-
- //
- // Read-Only Port B
- //
- always @(posedge clk)
- //
- case (b_addr)
- 3'b000: bram_reg_b <= 32'hffffffff;
- 3'b001: bram_reg_b <= 32'hffffffff;
- 3'b010: bram_reg_b <= 32'hffffffff;
- 3'b011: bram_reg_b <= 32'h00000000;
- 3'b100: bram_reg_b <= 32'h00000000;
- 3'b101: bram_reg_b <= 32'h00000000;
- 3'b110: bram_reg_b <= 32'h00000001;
- 3'b111: bram_reg_b <= 32'hffffffff;
- endcase
-
-
-endmodule
diff --git a/rtl/curve/rom/brom_p256_zero.v b/rtl/curve/rom/brom_p256_zero.v
deleted file mode 100644
index 2672cf2..0000000
--- a/rtl/curve/rom/brom_p256_zero.v
+++ /dev/null
@@ -1,70 +0,0 @@
-//======================================================================
-//
-// Copyright (c) 2016, NORDUnet A/S All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions
-// are met:
-// - Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//
-// - Redistributions in binary form must reproduce the above copyright
-// notice, this list of conditions and the following disclaimer in the
-// documentation and/or other materials provided with the distribution.
-//
-// - Neither the name of the NORDUnet nor the names of its contributors may
-// be used to endorse or promote products derived from this software
-// without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
-// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
-// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
-// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-//======================================================================
-
-`timescale 1ns / 1ps
-
-module brom_p256_zero
- (
- //input wire clk,
- //input wire [ 3-1:0] b_addr,
- output wire [32-1:0] b_out
- );
-
-
- assign b_out = {32{1'b0}};
-
- //
- // Output Registers
- //
- //reg [31:0] bram_reg_b;
-
- //assign b_out = bram_reg_b;
-
-
- //
- // Read-Only Port B
- //
- //always @(posedge clk)
- //
- //case (b_addr)
- //3'b000: bram_reg_b <= 32'h00000000;
- //3'b001: bram_reg_b <= 32'h00000000;
- //3'b010: bram_reg_b <= 32'h00000000;
- //3'b011: bram_reg_b <= 32'h00000000;
- //3'b100: bram_reg_b <= 32'h00000000;
- //3'b101: bram_reg_b <= 32'h00000000;
- //3'b110: bram_reg_b <= 32'h00000000;
- //3'b111: bram_reg_b <= 32'h00000000;
- //endcase
-
-
-endmodule