diff options
Diffstat (limited to 'rtl/multiword/mw_mover.v')
| -rw-r--r-- | rtl/multiword/mw_mover.v | 350 |
1 files changed, 175 insertions, 175 deletions
diff --git a/rtl/multiword/mw_mover.v b/rtl/multiword/mw_mover.v index 5db95a7..d6e025f 100644 --- a/rtl/multiword/mw_mover.v +++ b/rtl/multiword/mw_mover.v @@ -1,175 +1,175 @@ -//------------------------------------------------------------------------------
-//
-// mw_mover.v
-// -----------------------------------------------------------------------------
-// Multi-word data mover.
-//
-// Authors: Pavel Shatov
-//
-// Copyright (c) 2015-2016, 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 mw_mover
- (
- clk, rst_n,
- ena, rdy,
- x_addr, y_addr, y_wren,
- x_din, y_dout
- );
-
-
- //
- // Parameters
- //
- parameter WORD_COUNTER_WIDTH = 3;
- parameter OPERAND_NUM_WORDS = 8;
-
-
- // - // Handy Numbers - // - localparam [WORD_COUNTER_WIDTH-1:0] WORD_INDEX_ZERO = 0; - localparam [WORD_COUNTER_WIDTH-1:0] WORD_INDEX_LAST = OPERAND_NUM_WORDS - 1;
-
-
- // - // Handy Functions - // - function [WORD_COUNTER_WIDTH-1:0] WORD_INDEX_NEXT_OR_ZERO; - input [WORD_COUNTER_WIDTH-1:0] WORD_INDEX_CURRENT; - begin - WORD_INDEX_NEXT_OR_ZERO = (WORD_INDEX_CURRENT < WORD_INDEX_LAST) ? - WORD_INDEX_CURRENT + 1'b1 : WORD_INDEX_ZERO; - end - endfunction
-
-
- //
- // 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 [WORD_COUNTER_WIDTH-1:0] x_addr; // address of current X word
- output wire [WORD_COUNTER_WIDTH-1:0] y_addr; // address of current Y word
- output wire y_wren; // store current Y word
-
- input wire [ 32-1:0] x_din; // current X word
- output wire [ 32-1:0] y_dout; // current Y word
-
-
- // - // Word Indices - // - reg [WORD_COUNTER_WIDTH-1:0] index_x;
- reg [WORD_COUNTER_WIDTH-1:0] index_y;
-
-
- // - // Output Mapping
- // - assign x_addr = index_x;
- assign y_addr = index_y;
-
-
- // - // FSM - // - localparam FSM_SHREG_WIDTH = 1 * OPERAND_NUM_WORDS + 2; - - reg [FSM_SHREG_WIDTH-1:0] fsm_shreg; - - assign rdy = fsm_shreg[0]; - - wire [OPERAND_NUM_WORDS-1:0] fsm_shreg_inc_index_x = fsm_shreg[FSM_SHREG_WIDTH - (0 * OPERAND_NUM_WORDS + 1) : FSM_SHREG_WIDTH - (1 * OPERAND_NUM_WORDS + 0)]; - wire [OPERAND_NUM_WORDS-1:0] fsm_shreg_inc_index_y = fsm_shreg[FSM_SHREG_WIDTH - (0 * OPERAND_NUM_WORDS + 2) : FSM_SHREG_WIDTH - (1 * OPERAND_NUM_WORDS + 1)];
- - wire inc_index_x = |fsm_shreg_inc_index_x;
- wire inc_index_y = |fsm_shreg_inc_index_y;
- wire store_word_y = |fsm_shreg_inc_index_x; - - - always @(posedge clk or negedge rst_n) - // - if (rst_n == 1'b0) - // - fsm_shreg <= {{FSM_SHREG_WIDTH-1{1'b0}}, 1'b1}; - // - else begin - // - if (rdy) fsm_shreg <= {ena, {FSM_SHREG_WIDTH-2{1'b0}}, ~ena}; - // - else fsm_shreg <= {1'b0, fsm_shreg[FSM_SHREG_WIDTH-1:1]}; - // - end
-
-
- // - // Word Index Increment Logic - // - always @(posedge clk) - // - if (rdy) begin
- index_x <= WORD_INDEX_ZERO;
- index_y <= WORD_INDEX_ZERO;
- end else begin
- if (inc_index_x) index_x <= WORD_INDEX_NEXT_OR_ZERO(index_x);
- if (inc_index_y) index_y <= WORD_INDEX_NEXT_OR_ZERO(index_y);
- end
-
-
- //
- // Write Enable Logic
- //
- reg y_wren_reg;
-
- assign y_wren = y_wren_reg;
-
- always @(posedge clk) - // - if (rdy) y_wren_reg <= 1'b0; - else y_wren_reg <= store_word_y;
-
-
- //
- // Output Logic
- //
- assign y_dout = x_din;
-
-
-endmodule
-
-
-//------------------------------------------------------------------------------
-// End-of-File
-//------------------------------------------------------------------------------
+//------------------------------------------------------------------------------ +// +// mw_mover.v +// ----------------------------------------------------------------------------- +// Multi-word data mover. +// +// Authors: Pavel Shatov +// +// Copyright (c) 2015-2016, 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 mw_mover + ( + clk, rst_n, + ena, rdy, + x_addr, y_addr, y_wren, + x_din, y_dout + ); + + + // + // Parameters + // + parameter WORD_COUNTER_WIDTH = 3; + parameter OPERAND_NUM_WORDS = 8; + + + // + // Handy Numbers + // + localparam [WORD_COUNTER_WIDTH-1:0] WORD_INDEX_ZERO = 0; + localparam [WORD_COUNTER_WIDTH-1:0] WORD_INDEX_LAST = OPERAND_NUM_WORDS - 1; + + + // + // Handy Functions + // + function [WORD_COUNTER_WIDTH-1:0] WORD_INDEX_NEXT_OR_ZERO; + input [WORD_COUNTER_WIDTH-1:0] WORD_INDEX_CURRENT; + begin + WORD_INDEX_NEXT_OR_ZERO = (WORD_INDEX_CURRENT < WORD_INDEX_LAST) ? + WORD_INDEX_CURRENT + 1'b1 : WORD_INDEX_ZERO; + end + endfunction + + + // + // 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 [WORD_COUNTER_WIDTH-1:0] x_addr; // address of current X word + output wire [WORD_COUNTER_WIDTH-1:0] y_addr; // address of current Y word + output wire y_wren; // store current Y word + + input wire [ 32-1:0] x_din; // current X word + output wire [ 32-1:0] y_dout; // current Y word + + + // + // Word Indices + // + reg [WORD_COUNTER_WIDTH-1:0] index_x; + reg [WORD_COUNTER_WIDTH-1:0] index_y; + + + // + // Output Mapping + // + assign x_addr = index_x; + assign y_addr = index_y; + + + // + // FSM + // + localparam FSM_SHREG_WIDTH = 1 * OPERAND_NUM_WORDS + 2; + + reg [FSM_SHREG_WIDTH-1:0] fsm_shreg; + + assign rdy = fsm_shreg[0]; + + wire [OPERAND_NUM_WORDS-1:0] fsm_shreg_inc_index_x = fsm_shreg[FSM_SHREG_WIDTH - (0 * OPERAND_NUM_WORDS + 1) : FSM_SHREG_WIDTH - (1 * OPERAND_NUM_WORDS + 0)]; + wire [OPERAND_NUM_WORDS-1:0] fsm_shreg_inc_index_y = fsm_shreg[FSM_SHREG_WIDTH - (0 * OPERAND_NUM_WORDS + 2) : FSM_SHREG_WIDTH - (1 * OPERAND_NUM_WORDS + 1)]; + + wire inc_index_x = |fsm_shreg_inc_index_x; + wire inc_index_y = |fsm_shreg_inc_index_y; + wire store_word_y = |fsm_shreg_inc_index_x; + + + always @(posedge clk or negedge rst_n) + // + if (rst_n == 1'b0) + // + fsm_shreg <= {{FSM_SHREG_WIDTH-1{1'b0}}, 1'b1}; + // + else begin + // + if (rdy) fsm_shreg <= {ena, {FSM_SHREG_WIDTH-2{1'b0}}, ~ena}; + // + else fsm_shreg <= {1'b0, fsm_shreg[FSM_SHREG_WIDTH-1:1]}; + // + end + + + // + // Word Index Increment Logic + // + always @(posedge clk) + // + if (rdy) begin + index_x <= WORD_INDEX_ZERO; + index_y <= WORD_INDEX_ZERO; + end else begin + if (inc_index_x) index_x <= WORD_INDEX_NEXT_OR_ZERO(index_x); + if (inc_index_y) index_y <= WORD_INDEX_NEXT_OR_ZERO(index_y); + end + + + // + // Write Enable Logic + // + reg y_wren_reg; + + assign y_wren = y_wren_reg; + + always @(posedge clk) + // + if (rdy) y_wren_reg <= 1'b0; + else y_wren_reg <= store_word_y; + + + // + // Output Logic + // + assign y_dout = x_din; + + +endmodule + + +//------------------------------------------------------------------------------ +// End-of-File +//------------------------------------------------------------------------------ |