diff options
Diffstat (limited to 'rtl/modular/modular_invertor/helper/modinv_helper_invert_precalc.v')
-rw-r--r-- | rtl/modular/modular_invertor/helper/modinv_helper_invert_precalc.v | 408 |
1 files changed, 0 insertions, 408 deletions
diff --git a/rtl/modular/modular_invertor/helper/modinv_helper_invert_precalc.v b/rtl/modular/modular_invertor/helper/modinv_helper_invert_precalc.v deleted file mode 100644 index 3ebea00..0000000 --- a/rtl/modular/modular_invertor/helper/modinv_helper_invert_precalc.v +++ /dev/null @@ -1,408 +0,0 @@ -`timescale 1ns / 1ps - -module modinv_helper_invert_precalc - ( - clk, rst_n, - ena, rdy, - - r_addr, r_din, - s_addr, s_din, - u_addr, u_din, - v_addr, v_din, - - r_dbl_addr, r_dbl_wren, r_dbl_dout, - s_dbl_addr, s_dbl_wren, s_dbl_dout, - r_plus_s_addr, r_plus_s_wren, r_plus_s_dout, - u_half_addr, u_half_wren, u_half_dout, - v_half_addr, v_half_wren, v_half_dout, - u_minus_v_addr, u_minus_v_wren, u_minus_v_dout, u_minus_v_din, - v_minus_u_addr, v_minus_u_wren, v_minus_u_dout, v_minus_u_din, - u_minus_v_half_addr, u_minus_v_half_wren, u_minus_v_half_dout, - v_minus_u_half_addr, v_minus_u_half_wren, v_minus_u_half_dout - ); - - - // - // Parameters - // - parameter BUFFER_NUM_WORDS = 9; - parameter BUFFER_ADDR_BITS = 4; - - - // - // clog2 - // -`include "../modinv_clog2.v" - - - // - // Constants - // - localparam PROC_NUM_CYCLES = 2 * BUFFER_NUM_WORDS + 4; - localparam PROC_CNT_BITS = clog2(PROC_NUM_CYCLES); - - - // - // Ports - // - input wire clk; - input wire rst_n; - input wire ena; - output wire rdy; - - output wire [BUFFER_ADDR_BITS-1:0] r_addr; - output wire [BUFFER_ADDR_BITS-1:0] s_addr; - output wire [BUFFER_ADDR_BITS-1:0] u_addr; - output wire [BUFFER_ADDR_BITS-1:0] v_addr; - - input wire [ 32-1:0] r_din; - input wire [ 32-1:0] s_din; - input wire [ 32-1:0] u_din; - input wire [ 32-1:0] v_din; - - output wire [BUFFER_ADDR_BITS-1:0] r_dbl_addr; - output wire [BUFFER_ADDR_BITS-1:0] s_dbl_addr; - output wire [BUFFER_ADDR_BITS-1:0] r_plus_s_addr; - output wire [BUFFER_ADDR_BITS-1:0] u_half_addr; - output wire [BUFFER_ADDR_BITS-1:0] v_half_addr; - output wire [BUFFER_ADDR_BITS-1:0] u_minus_v_addr; - output wire [BUFFER_ADDR_BITS-1:0] v_minus_u_addr; - output wire [BUFFER_ADDR_BITS-1:0] u_minus_v_half_addr; - output wire [BUFFER_ADDR_BITS-1:0] v_minus_u_half_addr; - - output wire [ 32-1:0] r_dbl_dout; - output wire [ 32-1:0] s_dbl_dout; - output wire [ 32-1:0] r_plus_s_dout; - output wire [ 32-1:0] u_half_dout; - output wire [ 32-1:0] v_half_dout; - output wire [ 32-1:0] u_minus_v_dout; - output wire [ 32-1:0] v_minus_u_dout; - output wire [ 32-1:0] u_minus_v_half_dout; - output wire [ 32-1:0] v_minus_u_half_dout; - - output wire r_dbl_wren; - output wire s_dbl_wren; - output wire r_plus_s_wren; - output wire u_half_wren; - output wire v_half_wren; - output wire u_minus_v_wren; - output wire v_minus_u_wren; - output wire u_minus_v_half_wren; - output wire v_minus_u_half_wren; - - input wire [ 32-1:0] u_minus_v_din; - input wire [ 32-1:0] v_minus_u_din; - - - - // - // Counter - // - reg [PROC_CNT_BITS-1:0] proc_cnt; - - wire [PROC_CNT_BITS-1:0] proc_cnt_max = PROC_NUM_CYCLES - 1; - wire [PROC_CNT_BITS-1:0] proc_cnt_zero = {PROC_CNT_BITS{1'b0}}; - wire [PROC_CNT_BITS-1:0] proc_cnt_next = (proc_cnt < proc_cnt_max) ? - proc_cnt + 1'b1 : proc_cnt_zero; - - // - // Addresses - // - reg [BUFFER_ADDR_BITS-1:0] addr_in; - - wire [BUFFER_ADDR_BITS-1:0] addr_in_last = BUFFER_NUM_WORDS - 1; - wire [BUFFER_ADDR_BITS-1:0] addr_in_zero = {BUFFER_ADDR_BITS{1'b0}}; - wire [BUFFER_ADDR_BITS-1:0] addr_in_next = (addr_in < addr_in_last) ? - addr_in + 1'b1 : addr_in_zero; - wire [BUFFER_ADDR_BITS-1:0] addr_in_prev = (addr_in > addr_in_zero) ? - addr_in - 1'b1 : addr_in_zero; - - reg [BUFFER_ADDR_BITS-1:0] addr_out1; - - wire [BUFFER_ADDR_BITS-1:0] addr_out1_last = BUFFER_NUM_WORDS - 1; - wire [BUFFER_ADDR_BITS-1:0] addr_out1_zero = {BUFFER_ADDR_BITS{1'b0}}; - wire [BUFFER_ADDR_BITS-1:0] addr_out1_next = (addr_out1 < addr_out1_last) ? - addr_out1 + 1'b1 : addr_out1_zero; - - reg [BUFFER_ADDR_BITS-1:0] addr_out2; - - wire [BUFFER_ADDR_BITS-1:0] addr_out2_last = BUFFER_NUM_WORDS - 1; - wire [BUFFER_ADDR_BITS-1:0] addr_out2_zero = {BUFFER_ADDR_BITS{1'b0}}; - wire [BUFFER_ADDR_BITS-1:0] addr_out2_next = (addr_out2 < addr_out2_last) ? - addr_out2 + 1'b1 : addr_out2_zero; - wire [BUFFER_ADDR_BITS-1:0] addr_out2_prev = (addr_out2 > addr_out2_zero) ? - addr_out2 - 1'b1 : addr_out2_zero; - - reg [BUFFER_ADDR_BITS-1:0] addr_out3; - - wire [BUFFER_ADDR_BITS-1:0] addr_out3_last = BUFFER_NUM_WORDS - 1; - wire [BUFFER_ADDR_BITS-1:0] addr_out3_zero = {BUFFER_ADDR_BITS{1'b0}}; - wire [BUFFER_ADDR_BITS-1:0] addr_out3_prev = (addr_out3 > addr_out3_zero) ? - addr_out3 - 1'b1 : addr_out3_last; - - reg [BUFFER_ADDR_BITS-1:0] addr_out4; - - wire [BUFFER_ADDR_BITS-1:0] addr_out4_last = BUFFER_NUM_WORDS - 1; - wire [BUFFER_ADDR_BITS-1:0] addr_out4_zero = {BUFFER_ADDR_BITS{1'b0}}; - wire [BUFFER_ADDR_BITS-1:0] addr_out4_prev = (addr_out4 > addr_out4_zero) ? - addr_out4 - 1'b1 : addr_out4_last; - - - assign r_addr = addr_in; - assign s_addr = addr_in; - assign u_addr = addr_in; - assign v_addr = addr_in; - - assign r_dbl_addr = addr_out1; - assign s_dbl_addr = addr_out1; - assign r_plus_s_addr = addr_out2; - assign u_half_addr = addr_out3; - assign v_half_addr = addr_out3; - assign u_minus_v_addr = addr_out2; - assign v_minus_u_addr = addr_out2; - assign u_minus_v_half_addr = addr_out4; - assign v_minus_u_half_addr = addr_out4; - - - // - // Ready Flag - // - assign rdy = (proc_cnt == proc_cnt_zero); - - - // - // Address Increment/Decrement Logic - // - wire inc_addr_in; - wire dec_addr_in; - wire inc_addr_out1; - wire inc_addr_out2; - wire dec_addr_out2; - wire dec_addr_out3; - wire dec_addr_out4; - - wire [PROC_CNT_BITS-1:0] cnt_inc_addr_in_start = 0 * BUFFER_NUM_WORDS + 1; - wire [PROC_CNT_BITS-1:0] cnt_inc_addr_in_stop = 1 * BUFFER_NUM_WORDS - 1; - - wire [PROC_CNT_BITS-1:0] cnt_inc_addr_out1_start = 0 * BUFFER_NUM_WORDS + 2; - wire [PROC_CNT_BITS-1:0] cnt_inc_addr_out1_stop = 1 * BUFFER_NUM_WORDS + 1; - - wire [PROC_CNT_BITS-1:0] cnt_inc_addr_out2_start = 0 * BUFFER_NUM_WORDS + 3; - wire [PROC_CNT_BITS-1:0] cnt_inc_addr_out2_stop = 1 * BUFFER_NUM_WORDS + 1; - - wire [PROC_CNT_BITS-1:0] cnt_dec_addr_out2_start = 1 * BUFFER_NUM_WORDS + 3; - wire [PROC_CNT_BITS-1:0] cnt_dec_addr_out2_stop = 2 * BUFFER_NUM_WORDS + 1; - - wire [PROC_CNT_BITS-1:0] cnt_dec_addr_in_start = 1 * BUFFER_NUM_WORDS + 0; - wire [PROC_CNT_BITS-1:0] cnt_dec_addr_in_stop = 2 * BUFFER_NUM_WORDS - 2; - - wire [PROC_CNT_BITS-1:0] cnt_dec_addr_out3_start = 1 * BUFFER_NUM_WORDS + 1; - wire [PROC_CNT_BITS-1:0] cnt_dec_addr_out3_stop = 2 * BUFFER_NUM_WORDS + 0; - - wire [PROC_CNT_BITS-1:0] cnt_dec_addr_out4_start = 1 * BUFFER_NUM_WORDS + 4; - wire [PROC_CNT_BITS-1:0] cnt_dec_addr_out4_stop = 2 * BUFFER_NUM_WORDS + 3; - - assign inc_addr_in = (proc_cnt >= cnt_inc_addr_in_start) && (proc_cnt <= cnt_inc_addr_in_stop); - assign dec_addr_in = (proc_cnt >= cnt_dec_addr_in_start) && (proc_cnt <= cnt_dec_addr_in_stop); - assign inc_addr_out1 = (proc_cnt >= cnt_inc_addr_out1_start) && (proc_cnt <= cnt_inc_addr_out1_stop); - assign inc_addr_out2 = (proc_cnt >= cnt_inc_addr_out2_start) && (proc_cnt <= cnt_inc_addr_out2_stop); - assign dec_addr_out2 = (proc_cnt >= cnt_dec_addr_out2_start) && (proc_cnt <= cnt_dec_addr_out2_stop); - assign dec_addr_out3 = (proc_cnt >= cnt_dec_addr_out3_start) && (proc_cnt <= cnt_dec_addr_out3_stop); - assign dec_addr_out4 = (proc_cnt >= cnt_dec_addr_out4_start) && (proc_cnt <= cnt_dec_addr_out4_stop); - - - always @(posedge clk) begin - // - if (rdy) begin - // - addr_in <= addr_in_zero; - addr_out1 <= addr_out1_zero; - addr_out2 <= addr_out2_zero; - addr_out3 <= addr_out3_last; - addr_out4 <= addr_out4_last; - // - end else begin - // - if (inc_addr_in) addr_in <= addr_in_next; - else if (dec_addr_in) addr_in <= addr_in_prev; - // - if (inc_addr_out1) addr_out1 <= addr_out1_next; - else addr_out1 <= addr_out1_zero; - // - if (inc_addr_out2) addr_out2 <= addr_out2_next; - else if (dec_addr_out2) addr_out2 <= addr_out2_prev; - // - if (dec_addr_out3) addr_out3 <= addr_out3_prev; - else addr_out3 <= addr_out3_last; - // - if (dec_addr_out4) addr_out4 <= addr_out4_prev; - else addr_out4 <= addr_out4_last; - // - end - // - end - - - // - // Write Enable Logic - // - wire wren_out1; - wire wren_out2; - wire wren_out3; - wire wren_out4; - - wire [PROC_CNT_BITS-1:0] cnt_wren_out1_start = 0 * BUFFER_NUM_WORDS + 2; - wire [PROC_CNT_BITS-1:0] cnt_wren_out1_stop = 1 * BUFFER_NUM_WORDS + 1; - - wire [PROC_CNT_BITS-1:0] cnt_wren_out2_start = 0 * BUFFER_NUM_WORDS + 3; - wire [PROC_CNT_BITS-1:0] cnt_wren_out2_stop = 1 * BUFFER_NUM_WORDS + 2; - - wire [PROC_CNT_BITS-1:0] cnt_wren_out3_start = 1 * BUFFER_NUM_WORDS + 1; - wire [PROC_CNT_BITS-1:0] cnt_wren_out3_stop = 2 * BUFFER_NUM_WORDS + 0; - - wire [PROC_CNT_BITS-1:0] cnt_wren_out4_start = 1 * BUFFER_NUM_WORDS + 4; - wire [PROC_CNT_BITS-1:0] cnt_wren_out4_stop = 2 * BUFFER_NUM_WORDS + 3; - - assign wren_out1 = (proc_cnt >= cnt_wren_out1_start) && (proc_cnt <= cnt_wren_out1_stop); - assign wren_out2 = (proc_cnt >= cnt_wren_out2_start) && (proc_cnt <= cnt_wren_out2_stop); - assign wren_out3 = (proc_cnt >= cnt_wren_out3_start) && (proc_cnt <= cnt_wren_out3_stop); - assign wren_out4 = (proc_cnt >= cnt_wren_out4_start) && (proc_cnt <= cnt_wren_out4_stop); - - assign r_dbl_wren = wren_out1; - assign s_dbl_wren = wren_out1; - assign r_plus_s_wren = wren_out2; - assign u_half_wren = wren_out3; - assign v_half_wren = wren_out3; - assign u_minus_v_wren = wren_out2; - assign v_minus_u_wren = wren_out2; - assign u_minus_v_half_wren = wren_out4; - assign v_minus_u_half_wren = wren_out4; - - - // - // Adder (r + s) - // - wire [31: 0] add32_r_plus_s_sum_out; - wire add32_r_plus_s_carry_in; - wire add32_r_plus_s_carry_out; - - adder32_wrapper add32_r_plus_s - ( - .clk (clk), - .a (r_din), - .b (s_din), - .s (add32_r_plus_s_sum_out), - .c_in (add32_r_plus_s_carry_in), - .c_out (add32_r_plus_s_carry_out) - ); - - // - // Subtractor (u - v) - // - wire [31: 0] sub32_u_minus_v_difference_out; - wire sub32_u_minus_v_borrow_in; - wire sub32_u_minus_v_borrow_out; - - subtractor32_wrapper sub32_u_minus_v - ( - .clk (clk), - .a (u_din), - .b (v_din), - .d (sub32_u_minus_v_difference_out), - .b_in (sub32_u_minus_v_borrow_in), - .b_out (sub32_u_minus_v_borrow_out) - ); - - // - // Subtractor (v - u) - // - wire [31: 0] sub32_v_minus_u_difference_out; - wire sub32_v_minus_u_borrow_in; - wire sub32_v_minus_u_borrow_out; - - subtractor32_wrapper sub32_v_minus_u - ( - .clk (clk), - .a (v_din), - .b (u_din), - .d (sub32_v_minus_u_difference_out), - .b_in (sub32_v_minus_u_borrow_in), - .b_out (sub32_v_minus_u_borrow_out) - ); - - - // - // Carry & Borrow Masking Logic - // - reg mask_carry_borrow; - - always @(posedge clk) - // - mask_carry_borrow <= ((proc_cnt >= cnt_wren_out1_start) && (proc_cnt < cnt_wren_out1_stop)) ? - 1'b0 : 1'b1; - - assign add32_r_plus_s_carry_in = add32_r_plus_s_carry_out & ~mask_carry_borrow; - assign sub32_u_minus_v_borrow_in = sub32_u_minus_v_borrow_out & ~mask_carry_borrow; - assign sub32_v_minus_u_borrow_in = sub32_v_minus_u_borrow_out & ~mask_carry_borrow; - - - // - // Carry Bits - // - reg r_dbl_carry; - reg s_dbl_carry; - reg u_half_carry; - reg v_half_carry; - reg u_minus_v_half_carry; - reg v_minus_u_half_carry; - - always @(posedge clk) begin - - r_dbl_carry <= ((proc_cnt >= cnt_wren_out1_start) && (proc_cnt < cnt_wren_out1_stop)) ? - r_din[31] : 1'b0; - - s_dbl_carry <= ((proc_cnt >= cnt_wren_out1_start) && (proc_cnt < cnt_wren_out1_stop)) ? - s_din[31] : 1'b0; - - u_half_carry <= ((proc_cnt >= cnt_wren_out3_start) && (proc_cnt < cnt_wren_out3_stop)) ? - u_din[0] : 1'b0; - - v_half_carry <= ((proc_cnt >= cnt_wren_out3_start) && (proc_cnt < cnt_wren_out3_stop)) ? - v_din[0] : 1'b0; - - u_minus_v_half_carry <= ((proc_cnt >= cnt_wren_out4_start) && (proc_cnt < cnt_wren_out4_stop)) ? - u_minus_v_din[0] : 1'b0; - - v_minus_u_half_carry <= ((proc_cnt >= cnt_wren_out4_start) && (proc_cnt < cnt_wren_out4_stop)) ? - v_minus_u_din[0] : 1'b0; - - end - - - // - // Data Mapper - // - assign r_dbl_dout = {r_din[30:0], r_dbl_carry}; - assign s_dbl_dout = {s_din[30:0], s_dbl_carry}; - assign r_plus_s_dout = add32_r_plus_s_sum_out; - assign u_half_dout = {u_half_carry, u_din[31:1]}; - assign v_half_dout = {v_half_carry, v_din[31:1]}; - assign u_minus_v_dout = sub32_u_minus_v_difference_out; - assign v_minus_u_dout = sub32_v_minus_u_difference_out; - assign u_minus_v_half_dout = {u_minus_v_half_carry, u_minus_v_din[31:1]}; - assign v_minus_u_half_dout = {v_minus_u_half_carry, v_minus_u_din[31:1]}; - - - // - // Primary Counter Logic - // - always @(posedge clk or negedge rst_n) - // - if (rst_n == 1'b0) proc_cnt <= proc_cnt_zero; - else begin - if (!rdy) proc_cnt <= proc_cnt_next; - else if (ena) proc_cnt <= proc_cnt_next; - end - - -endmodule |