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-rw-r--r--rtl/curve/curve_mul_256.v719
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-//------------------------------------------------------------------------------
-//
-// curve_mul_256.v
-// -----------------------------------------------------------------------------
-// Elliptic curve point scalar multiplier.
-//
-// Authors: Pavel Shatov
-//
-// Copyright (c) 2016, NORDUnet A/S
-//
-// 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.
-//
-//------------------------------------------------------------------------------
-
-module curve_mul_256
- (
- clk, rst_n,
- ena, rdy,
- k_addr, rx_addr, ry_addr,
- rx_wren, ry_wren,
- k_din,
- rx_dout, ry_dout
- );
-
-
- //
- // Constants
- //
- localparam WORD_COUNTER_WIDTH = 3; // 0 .. 7
- localparam OPERAND_NUM_WORDS = 8; // 8 * 32 = 256
-
-
- //
- // Ports
- //
- input wire clk; // system clock
- input wire rst_n; // active-low async reset
-
- input wire ena; // enable input
- output wire rdy; // ready output
-
- output wire [ 2: 0] k_addr;
- output wire [ 2: 0] rx_addr;
- output wire [ 2: 0] ry_addr;
-
- output wire rx_wren;
- output wire ry_wren;
-
- input wire [31: 0] k_din;
-
- output wire [31: 0] rx_dout;
- output wire [31: 0] ry_dout;
-
-
- //
- // Temporary Variables
- //
- reg [ 2: 0] bram_tx_wr_addr;
- reg [ 2: 0] bram_ty_wr_addr;
- reg [ 2: 0] bram_tz_wr_addr;
-
- reg [ 2: 0] bram_rx_wr_addr;
- reg [ 2: 0] bram_ry_wr_addr;
- reg [ 2: 0] bram_rz_wr_addr;
- wire [ 2: 0] bram_rz1_wr_addr;
-
- reg [ 2: 0] bram_tx_rd_addr;
- reg [ 2: 0] bram_ty_rd_addr;
- reg [ 2: 0] bram_tz_rd_addr;
-
- reg [ 2: 0] bram_rx_rd_addr;
- reg [ 2: 0] bram_ry_rd_addr;
- reg [ 2: 0] bram_rz_rd_addr;
- wire [ 2: 0] bram_rz1_rd_addr;
-
- reg bram_tx_wr_en;
- reg bram_ty_wr_en;
- reg bram_tz_wr_en;
-
- reg bram_rx_wr_en;
- reg bram_ry_wr_en;
- reg bram_rz_wr_en;
- wire bram_rz1_wr_en;
-
- wire [31: 0] bram_tx_rd_data;
- wire [31: 0] bram_ty_rd_data;
- wire [31: 0] bram_tz_rd_data;
-
- wire [31: 0] bram_rx_rd_data;
- wire [31: 0] bram_ry_rd_data;
- wire [31: 0] bram_rz_rd_data;
- wire [31: 0] bram_rz1_rd_data;
-
- reg [31: 0] bram_tx_wr_data_in;
- reg [31: 0] bram_ty_wr_data_in;
- reg [31: 0] bram_tz_wr_data_in;
-
- reg [31: 0] bram_rx_wr_data_in;
- reg [31: 0] bram_ry_wr_data_in;
- reg [31: 0] bram_rz_wr_data_in;
- wire [31: 0] bram_rz1_wr_data_in;
-
- wire [31: 0] bram_tx_wr_data_out;
- wire [31: 0] bram_ty_wr_data_out;
- wire [31: 0] bram_tz_wr_data_out;
-
- wire [31: 0] bram_rx_wr_data_out;
- wire [31: 0] bram_ry_wr_data_out;
- wire [31: 0] bram_rz_wr_data_out;
-
- bram_1rw_1ro_readfirst # (.MEM_WIDTH(32), .MEM_ADDR_BITS(3))
- bram_tx (.clk(clk),
- .a_addr(bram_tx_wr_addr), .a_wr(bram_tx_wr_en), .a_in(bram_tx_wr_data_in), .a_out(bram_tx_wr_data_out),
- .b_addr(bram_tx_rd_addr), .b_out(bram_tx_rd_data));
-
- bram_1rw_1ro_readfirst # (.MEM_WIDTH(32), .MEM_ADDR_BITS(3))
- bram_ty (.clk(clk),
- .a_addr(bram_ty_wr_addr), .a_wr(bram_ty_wr_en), .a_in(bram_ty_wr_data_in), .a_out(bram_ty_wr_data_out),
- .b_addr(bram_ty_rd_addr), .b_out(bram_ty_rd_data));
-
- bram_1rw_1ro_readfirst # (.MEM_WIDTH(32), .MEM_ADDR_BITS(3))
- bram_tz (.clk(clk),
- .a_addr(bram_tz_wr_addr), .a_wr(bram_tz_wr_en), .a_in(bram_tz_wr_data_in), .a_out(bram_tz_wr_data_out),
- .b_addr(bram_tz_rd_addr), .b_out(bram_tz_rd_data));
-
- bram_1rw_1ro_readfirst # (.MEM_WIDTH(32), .MEM_ADDR_BITS(3))
- bram_rx (.clk(clk),
- .a_addr(bram_rx_wr_addr), .a_wr(bram_rx_wr_en), .a_in(bram_rx_wr_data_in), .a_out(bram_rx_wr_data_out),
- .b_addr(bram_rx_rd_addr), .b_out(bram_rx_rd_data));
-
- bram_1rw_1ro_readfirst # (.MEM_WIDTH(32), .MEM_ADDR_BITS(3))
- bram_ry (.clk(clk),
- .a_addr(bram_ry_wr_addr), .a_wr(bram_ry_wr_en), .a_in(bram_ry_wr_data_in), .a_out(bram_ry_wr_data_out),
- .b_addr(bram_ry_rd_addr), .b_out(bram_ry_rd_data));
-
- bram_1rw_1ro_readfirst # (.MEM_WIDTH(32), .MEM_ADDR_BITS(3))
- bram_rz (.clk(clk),
- .a_addr(bram_rz_wr_addr), .a_wr(bram_rz_wr_en), .a_in(bram_rz_wr_data_in), .a_out(bram_rz_wr_data_out),
- .b_addr(bram_rz_rd_addr), .b_out(bram_rz_rd_data));
-
- bram_1rw_1ro_readfirst # (.MEM_WIDTH(32), .MEM_ADDR_BITS(3))
- bram_rz1 (.clk(clk),
- .a_addr(bram_rz1_wr_addr), .a_wr(bram_rz1_wr_en), .a_in(bram_rz1_wr_data_in), .a_out(),
- .b_addr(bram_rz1_rd_addr), .b_out(bram_rz1_rd_data));
-
-
- //
- // FSM
- //
- localparam [ 3: 0] FSM_STATE_IDLE = 4'd00;
- localparam [ 3: 0] FSM_STATE_PREPARE_TRIG = 4'd01;
- localparam [ 3: 0] FSM_STATE_PREPARE_WAIT = 4'd02;
- localparam [ 3: 0] FSM_STATE_DOUBLE_TRIG = 4'd03;
- localparam [ 3: 0] FSM_STATE_DOUBLE_WAIT = 4'd04;
- localparam [ 3: 0] FSM_STATE_ADD_TRIG = 4'd05;
- localparam [ 3: 0] FSM_STATE_ADD_WAIT = 4'd06;
- localparam [ 3: 0] FSM_STATE_COPY_TRIG = 4'd07;
- localparam [ 3: 0] FSM_STATE_COPY_WAIT = 4'd08;
- localparam [ 3: 0] FSM_STATE_INVERT_TRIG = 4'd09;
- localparam [ 3: 0] FSM_STATE_INVERT_WAIT = 4'd10;
- localparam [ 3: 0] FSM_STATE_CONVERT_TRIG = 4'd11;
- localparam [ 3: 0] FSM_STATE_CONVERT_WAIT = 4'd12;
- localparam [ 3: 0] FSM_STATE_DONE = 4'd13;
-
- reg [3:0] fsm_state = FSM_STATE_IDLE;
-
-
- //
- // Round Counter
- //
- reg [ 7: 0] bit_counter;
- wire [ 7: 0] bit_counter_max = 8'd255;
- wire [ 7: 0] bit_counter_zero = 8'd0;
- wire [ 7: 0] bit_counter_next =
- (bit_counter < bit_counter_max) ? bit_counter + 1'b1 : bit_counter_zero;
-
-
- //
- // Round Completion
- //
- wire [ 3: 0] fsm_state_round_next = (bit_counter < bit_counter_max) ?
- FSM_STATE_DOUBLE_TRIG : FSM_STATE_INVERT_TRIG;
-
-
- //
- // OP Trigger Logic
- //
- reg op_trig;
- wire op_done;
-
- always @(posedge clk or negedge rst_n)
- //
- if (rst_n == 1'b0) op_trig <= 1'b0;
- else op_trig <= (fsm_state == FSM_STATE_PREPARE_TRIG) ||
- (fsm_state == FSM_STATE_DOUBLE_TRIG) ||
- (fsm_state == FSM_STATE_ADD_TRIG) ||
- (fsm_state == FSM_STATE_CONVERT_TRIG);
-
- //
- // Microprograms
- //
- wire [ 5: 0] op_rom_addr;
- wire [19: 0] op_rom_init_data;
- wire [19: 0] op_rom_dbl_data;
- wire [19: 0] op_rom_add_data;
- wire [19: 0] op_rom_conv_data;
- reg [19: 0] op_rom_mux_data;
-
- (* EQUIVALENT_REGISTER_REMOVAL="NO" *)
- uop_init_rom op_rom_init
- (
- .clk (clk),
- .addr (op_rom_addr),
- .data (op_rom_init_data)
- );
- (* EQUIVALENT_REGISTER_REMOVAL="NO" *)
- uop_dbl_rom op_rom_dbl
- (
- .clk (clk),
- .addr (op_rom_addr),
- .data (op_rom_dbl_data)
- );
-
- (* EQUIVALENT_REGISTER_REMOVAL="NO" *)
- uop_add_rom op_rom_add
- (
- .clk (clk),
- .addr (op_rom_addr),
- .data (op_rom_add_data)
- );
-
- (* EQUIVALENT_REGISTER_REMOVAL="NO" *)
- uop_conv_rom op_rom_conv
- (
- .clk (clk),
- .addr (op_rom_addr),
- .data (op_rom_conv_data)
- );
-
- always @(*)
- //
- case (fsm_state)
- FSM_STATE_PREPARE_WAIT: op_rom_mux_data = op_rom_init_data;
- FSM_STATE_DOUBLE_WAIT: op_rom_mux_data = op_rom_dbl_data;
- FSM_STATE_ADD_WAIT: op_rom_mux_data = op_rom_add_data;
- FSM_STATE_CONVERT_WAIT: op_rom_mux_data = op_rom_conv_data;
- default: op_rom_mux_data = {20{1'bX}};
- endcase
-
-
-
- //
- // Modulus
- //
- reg [ 2: 0] rom_q_addr;
- wire [31: 0] rom_q_data;
-
- brom_p256_q rom_q
- (
- .clk (clk),
- .b_addr (rom_q_addr),
- .b_out (rom_q_data)
- );
-
-
- //
- // Worker
- //
- wire [ 2: 0] worker_addr_px;
- wire [ 2: 0] worker_addr_py;
- wire [ 2: 0] worker_addr_pz;
-
- wire [ 2: 0] worker_addr_rx;
- wire [ 2: 0] worker_addr_ry;
- wire [ 2: 0] worker_addr_rz;
-
- wire [ 2: 0] worker_addr_q;
-
- wire worker_wren_rx;
- wire worker_wren_ry;
- wire worker_wren_rz;
-
- reg [31: 0] worker_din_px;
- reg [31: 0] worker_din_py;
- reg [31: 0] worker_din_pz;
-
- reg [31: 0] worker_din_rx;
- reg [31: 0] worker_din_ry;
- reg [31: 0] worker_din_rz;
-
- wire [31: 0] worker_dout_rx;
- wire [31: 0] worker_dout_ry;
- wire [31: 0] worker_dout_rz;
-
- curve_dbl_add_256 worker
- (
- .clk (clk),
- .rst_n (rst_n),
-
- .ena (op_trig),
- .rdy (op_done),
-
- .uop_addr (op_rom_addr),
- .uop (op_rom_mux_data),
-
- .px_addr (worker_addr_px),
- .py_addr (worker_addr_py),
- .pz_addr (worker_addr_pz),
-
- .rx_addr (worker_addr_rx),
- .ry_addr (worker_addr_ry),
- .rz_addr (worker_addr_rz),
-
- .q_addr (worker_addr_q),
-
- .v_addr (bram_rz1_rd_addr),
-
- .rx_wren (worker_wren_rx),
- .ry_wren (worker_wren_ry),
- .rz_wren (worker_wren_rz),
-
- .px_din (worker_din_px),
- .py_din (worker_din_py),
- .pz_din (worker_din_pz),
-
- .rx_din (worker_din_rx),
- .ry_din (worker_din_ry),
- .rz_din (worker_din_rz),
-
- .rx_dout (worker_dout_rx),
- .ry_dout (worker_dout_ry),
- .rz_dout (worker_dout_rz),
-
- .q_din (rom_q_data),
-
- .v_din (bram_rz1_rd_data)
- );
-
-
- //
- // Mover
- //
- reg move_trig;
- wire move_done;
-
- wire [ 2: 0] mover_addr_x;
- wire [ 2: 0] mover_addr_y;
-
- wire mover_wren_y;
-
- always @(posedge clk or negedge rst_n)
- //
- if (rst_n == 1'b0) move_trig <= 1'b0;
- else move_trig <= (fsm_state == FSM_STATE_COPY_TRIG);
-
- mw_mover #
- (
- .WORD_COUNTER_WIDTH (3),
- .OPERAND_NUM_WORDS (8)
- )
- mover
- (
- .clk (clk),
- .rst_n (rst_n),
-
- .ena (move_trig),
- .rdy (move_done),
-
- .x_addr (mover_addr_x),
- .y_addr (mover_addr_y),
- .y_wren (mover_wren_y),
-
- .x_din ({32{1'bX}}),
- .y_dout ()
- );
-
-
- //
- // Invertor
- //
- reg invert_trig;
- wire invert_done;
-
- wire [ 2: 0] invertor_addr_a;
- wire [ 2: 0] invertor_addr_q;
-
- always @(posedge clk or negedge rst_n)
- //
- if (rst_n == 1'b0) invert_trig <= 1'b0;
- else invert_trig <= (fsm_state == FSM_STATE_INVERT_TRIG);
-
- modular_invertor #
- (
- .MAX_OPERAND_WIDTH(256)
- )
- invertor
- (
- .clk (clk),
- .rst_n (rst_n),
-
- .ena (invert_trig),
- .rdy (invert_done),
-
- .a_addr (invertor_addr_a),
- .q_addr (invertor_addr_q),
- .a1_addr (bram_rz1_wr_addr),
- .a1_wren (bram_rz1_wr_en),
-
- .a_din (bram_rz_rd_data),
- .q_din (rom_q_data),
- .a1_dout (bram_rz1_wr_data_in)
- );
-
-
- //
- // FSM Transition Logic
- //
- always @(posedge clk or negedge rst_n)
- //
- if (rst_n == 1'b0) fsm_state <= FSM_STATE_IDLE;
- else case (fsm_state)
-
- FSM_STATE_IDLE: fsm_state <= ena ? FSM_STATE_PREPARE_TRIG : FSM_STATE_IDLE;
-
- FSM_STATE_PREPARE_TRIG: fsm_state <= FSM_STATE_PREPARE_WAIT;
- FSM_STATE_PREPARE_WAIT: fsm_state <= (!op_trig && op_done) ? FSM_STATE_DOUBLE_TRIG : FSM_STATE_PREPARE_WAIT;
-
- FSM_STATE_DOUBLE_TRIG: fsm_state <= FSM_STATE_DOUBLE_WAIT;
- FSM_STATE_DOUBLE_WAIT: fsm_state <= (!op_trig && op_done) ? FSM_STATE_ADD_TRIG : FSM_STATE_DOUBLE_WAIT;
-
- FSM_STATE_ADD_TRIG: fsm_state <= FSM_STATE_ADD_WAIT;
- FSM_STATE_ADD_WAIT: fsm_state <= (!op_trig && op_done) ? FSM_STATE_COPY_TRIG : FSM_STATE_ADD_WAIT;
-
- FSM_STATE_COPY_TRIG: fsm_state <= FSM_STATE_COPY_WAIT;
- FSM_STATE_COPY_WAIT: fsm_state <= (!move_trig && move_done) ? fsm_state_round_next : FSM_STATE_COPY_WAIT;
-
- FSM_STATE_INVERT_TRIG: fsm_state <= FSM_STATE_INVERT_WAIT;
- FSM_STATE_INVERT_WAIT: fsm_state <= (!invert_trig && invert_done) ? FSM_STATE_CONVERT_TRIG : FSM_STATE_INVERT_WAIT;
-
- FSM_STATE_CONVERT_TRIG: fsm_state <= FSM_STATE_CONVERT_WAIT;
- FSM_STATE_CONVERT_WAIT: fsm_state <= (!op_trig && op_done) ? FSM_STATE_DONE : FSM_STATE_CONVERT_WAIT;
-
- FSM_STATE_DONE: fsm_state <= FSM_STATE_IDLE;
-
- default: fsm_state <= FSM_STATE_IDLE;
-
- endcase
-
-
- //
- // Bit Counter Increment
- //
- always @(posedge clk) begin
- //
- if ((fsm_state == FSM_STATE_PREPARE_WAIT) && !op_trig && op_done)
- bit_counter <= bit_counter_zero;
- //
- if ((fsm_state == FSM_STATE_COPY_WAIT) && !move_trig && move_done)
- bit_counter <= bit_counter_next;
- //
- end
-
-
- //
- // K Latch Logic
- //
- reg [ 2: 0] k_addr_reg;
- reg [31: 0] k_din_reg;
-
- assign k_addr = k_addr_reg;
-
- always @(posedge clk) begin
- //
- if (fsm_state == FSM_STATE_DOUBLE_TRIG)
- k_addr_reg <= 3'd7 - bit_counter[7:5];
- //
- if (fsm_state == FSM_STATE_ADD_TRIG)
- k_din_reg <= (bit_counter[4:0] == 5'd0) ? k_din : {k_din_reg[30:0], 1'bX};
- //
- end
-
-
-
- //
- // Copy Inhibit Logic
- //
- wire move_inhibit = k_din_reg[31];
-
- wire copy_t2r_int = mover_wren_y & ~move_inhibit;
-
-
- always @(*) begin
- //
- // Q
- //
- case (fsm_state)
- FSM_STATE_DOUBLE_WAIT: rom_q_addr = worker_addr_q;
- FSM_STATE_ADD_WAIT: rom_q_addr = worker_addr_q;
- FSM_STATE_INVERT_WAIT: rom_q_addr = invertor_addr_q;
- FSM_STATE_CONVERT_WAIT: rom_q_addr = worker_addr_q;
- default: rom_q_addr = worker_addr_q;
- endcase
-
- //
- // R(X,Y,Z)
- //
- case (fsm_state)
- //
- FSM_STATE_PREPARE_WAIT: begin
- //
- bram_rx_rd_addr <= {3{1'bX}}; bram_ry_rd_addr <= {3{1'bX}}; bram_rz_rd_addr <= {3{1'bX}};
- bram_rx_wr_addr <= worker_addr_rx; bram_ry_wr_addr <= worker_addr_ry; bram_rz_wr_addr <= worker_addr_rz;
- bram_rx_wr_en <= worker_wren_rx; bram_ry_wr_en <= worker_wren_ry; bram_rz_wr_en <= worker_wren_rz;
- bram_rx_wr_data_in <= worker_dout_rx; bram_ry_wr_data_in <= worker_dout_ry; bram_rz_wr_data_in <= worker_dout_rz;
- //
- end
- //
- FSM_STATE_DOUBLE_WAIT: begin
- //
- bram_rx_rd_addr <= worker_addr_px; bram_ry_rd_addr <= worker_addr_py; bram_rz_rd_addr <= worker_addr_pz;
- bram_rx_wr_addr <= {3{1'bX}}; bram_ry_wr_addr <= {3{1'bX}}; bram_rz_wr_addr <= {3{1'bX}};
- bram_rx_wr_en <= 1'b0; bram_ry_wr_en <= 1'b0; bram_rz_wr_en <= 1'b0;
- bram_rx_wr_data_in <= {32{1'bX}}; bram_ry_wr_data_in <= {32{1'bX}}; bram_rz_wr_data_in <= {32{1'bX}};
- //
- end
- //
- FSM_STATE_ADD_WAIT: begin
- //
- bram_rx_rd_addr <= {3{1'bX}}; bram_ry_rd_addr <= {3{1'bX}}; bram_rz_rd_addr <= {3{1'bX}};
- bram_rx_wr_addr <= worker_addr_rx; bram_ry_wr_addr <= worker_addr_ry; bram_rz_wr_addr <= worker_addr_rz;
- bram_rx_wr_en <= worker_wren_rx; bram_ry_wr_en <= worker_wren_ry; bram_rz_wr_en <= worker_wren_rz;
- bram_rx_wr_data_in <= worker_dout_rx; bram_ry_wr_data_in <= worker_dout_ry; bram_rz_wr_data_in <= worker_dout_rz;
- //
- end
- //
- FSM_STATE_COPY_WAIT: begin
- //
- bram_rx_rd_addr <= {3{1'bX}}; bram_ry_rd_addr <= {3{1'bX}}; bram_rz_rd_addr <= {3{1'bX}};
- bram_rx_wr_addr <= mover_addr_y; bram_ry_wr_addr <= mover_addr_y; bram_rz_wr_addr <= mover_addr_y;
- bram_rx_wr_en <= copy_t2r_int; bram_ry_wr_en <= copy_t2r_int; bram_rz_wr_en <= copy_t2r_int;
- bram_rx_wr_data_in <= bram_tx_rd_data; bram_ry_wr_data_in <= bram_ty_rd_data; bram_rz_wr_data_in <= bram_tz_rd_data;
- //
- end
- //
- FSM_STATE_INVERT_WAIT: begin
- //
- bram_rx_rd_addr <= {3{1'bX}}; bram_ry_rd_addr <= {3{1'bX}}; bram_rz_rd_addr <= invertor_addr_a;
- bram_rx_wr_addr <= {3{1'bX}}; bram_ry_wr_addr <= {3{1'bX}}; bram_rz_wr_addr <= {3{1'bX}};
- bram_rx_wr_en <= 1'b0; bram_ry_wr_en <= 1'b0; bram_rz_wr_en <= 1'b0;
- bram_rx_wr_data_in <= {32{1'bX}}; bram_ry_wr_data_in <= {32{1'bX}}; bram_rz_wr_data_in <= {32{1'bX}};
- //
- end
- //
- FSM_STATE_CONVERT_WAIT: begin
- //
- bram_rx_rd_addr <= worker_addr_px; bram_ry_rd_addr <= worker_addr_py; bram_rz_rd_addr <= worker_addr_pz;
- bram_rx_wr_addr <= {3{1'bX}}; bram_ry_wr_addr <= {3{1'bX}}; bram_rz_wr_addr <= {3{1'bX}};
- bram_rx_wr_en <= 1'b0; bram_ry_wr_en <= 1'b0; bram_rz_wr_en <= 1'b0;
- bram_rx_wr_data_in <= {32{1'bX}}; bram_ry_wr_data_in <= {32{1'bX}}; bram_rz_wr_data_in <= {32{1'bX}};
- //
- end
-
- //
- default: begin
- //
- bram_rx_rd_addr <= {3{1'bX}}; bram_ry_rd_addr <= {3{1'bX}}; bram_rz_rd_addr <= {3{1'bX}};
- bram_rx_wr_addr <= {3{1'bX}}; bram_ry_wr_addr <= {3{1'bX}}; bram_rz_wr_addr <= {3{1'bX}};
- bram_rx_wr_en <= 1'b0; bram_ry_wr_en <= 1'b0; bram_rz_wr_en <= 1'b0;
- bram_rx_wr_data_in <= {32{1'bX}}; bram_ry_wr_data_in <= {32{1'bX}}; bram_rz_wr_data_in <= {32{1'bX}};
- //
- end
- //
- endcase
- //
- // T(X,Y,Z)
- //
- case (fsm_state)
- //
- FSM_STATE_DOUBLE_WAIT: begin
- //
- bram_tx_rd_addr <= {3{1'bX}}; bram_ty_rd_addr <= {3{1'bX}}; bram_tz_rd_addr <= {3{1'bX}};
- bram_tx_wr_addr <= worker_addr_rx; bram_ty_wr_addr <= worker_addr_ry; bram_tz_wr_addr <= worker_addr_rz;
- bram_tx_wr_en <= worker_wren_rx; bram_ty_wr_en <= worker_wren_ry; bram_tz_wr_en <= worker_wren_rz;
- bram_tx_wr_data_in <= worker_dout_rx; bram_ty_wr_data_in <= worker_dout_ry; bram_tz_wr_data_in <= worker_dout_rz;
- //
- end
- //
- FSM_STATE_ADD_WAIT: begin
- //
- bram_tx_rd_addr <= worker_addr_px; bram_ty_rd_addr <= worker_addr_py; bram_tz_rd_addr <= worker_addr_pz;
- bram_tx_wr_addr <= {3{1'bX}}; bram_ty_wr_addr <= {3{1'bX}}; bram_tz_wr_addr <= {3{1'bX}};
- bram_tx_wr_en <= 1'b0; bram_ty_wr_en <= 1'b0; bram_tz_wr_en <= 1'b0;
- bram_tx_wr_data_in <= {32{1'bX}}; bram_ty_wr_data_in <= {32{1'bX}}; bram_tz_wr_data_in <= {32{1'bX}};
- //
- end
- //
- FSM_STATE_COPY_WAIT: begin
- //
- bram_tx_rd_addr <= mover_addr_x; bram_ty_rd_addr <= mover_addr_x; bram_tz_rd_addr <= mover_addr_x;
- bram_tx_wr_addr <= {3{1'bX}}; bram_ty_wr_addr <= {3{1'bX}}; bram_tz_wr_addr <= {3{1'bX}};
- bram_tx_wr_en <= 1'b0; bram_ty_wr_en <= 1'b0; bram_tz_wr_en <= 1'b0;
- bram_tx_wr_data_in <= {32{1'bX}}; bram_ty_wr_data_in <= {32{1'bX}}; bram_tz_wr_data_in <= {32{1'bX}};
- //
- end
-
- //
- default: begin
- //
- bram_tx_rd_addr <= {3{1'bX}}; bram_ty_rd_addr <= {3{1'bX}}; bram_tz_rd_addr <= {3{1'bX}};
- bram_tx_wr_addr <= {3{1'bX}}; bram_ty_wr_addr <= {3{1'bX}}; bram_tz_wr_addr <= {3{1'bX}};
- bram_tx_wr_en <= 1'b0; bram_ty_wr_en <= 1'b0; bram_tz_wr_en <= 1'b0;
- bram_tx_wr_data_in <= {32{1'bX}}; bram_ty_wr_data_in <= {32{1'bX}}; bram_tz_wr_data_in <= {32{1'bX}};
- //
- end
- //
- endcase
- //
- // Worker
- //
- case (fsm_state)
- //
- FSM_STATE_DOUBLE_WAIT: begin
- //
- worker_din_px <= bram_rx_rd_data; worker_din_py <= bram_ry_rd_data; worker_din_pz <= bram_rz_rd_data;
- worker_din_rx <= bram_tx_wr_data_out; worker_din_ry <= bram_ty_wr_data_out; worker_din_rz <= bram_tz_wr_data_out;
- //
- end
- //
- FSM_STATE_ADD_WAIT: begin
- //
- worker_din_px <= bram_tx_rd_data; worker_din_py <= bram_ty_rd_data; worker_din_pz <= bram_tz_rd_data;
- worker_din_rx <= bram_rx_wr_data_out; worker_din_ry <= bram_ry_wr_data_out; worker_din_rz <= bram_rz_wr_data_out;
- //
- end
- //
- FSM_STATE_CONVERT_WAIT: begin
- //
- worker_din_px <= bram_rx_rd_data; worker_din_py <= bram_ry_rd_data; worker_din_pz <= bram_rz_rd_data;
- worker_din_rx <= {32{1'bX}}; worker_din_ry <= {32{1'bX}}; worker_din_rz <= {32{1'bX}};
- //
- end
- //
- default: begin
- //
- worker_din_px <= {32{1'bX}}; worker_din_py <= {32{1'bX}}; worker_din_pz <= {32{1'bX}};
- worker_din_rx <= {32{1'bX}}; worker_din_ry <= {32{1'bX}}; worker_din_rz <= {32{1'bX}};
- //
- end
- //
- endcase
- //
- end
-
-
- //
- // Output Mapping
- //
- assign rx_wren = worker_wren_rx && (fsm_state == FSM_STATE_CONVERT_WAIT);
- assign ry_wren = worker_wren_ry && (fsm_state == FSM_STATE_CONVERT_WAIT);
-
- assign rx_dout = worker_dout_rx;
- assign ry_dout = worker_dout_ry;
-
- assign rx_addr = worker_addr_rx;
- assign ry_addr = worker_addr_ry;
-
-
- //
- // Ready Flag Logic
- //
- reg rdy_reg = 1'b1;
- assign rdy = rdy_reg;
-
- always @(posedge clk or negedge rst_n)
-
- if (rst_n == 1'b0) rdy_reg <= 1'b1;
- else begin
-
- /* clear flag */
- if ((fsm_state == FSM_STATE_IDLE) && ena)
- rdy_reg <= 1'b0;
-
- /* set flag */
- if (fsm_state == FSM_STATE_DONE)
- rdy_reg <= 1'b1;
-
- end
-
-
-endmodule
-
-
-//------------------------------------------------------------------------------
-// End-of-File
-//------------------------------------------------------------------------------