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foss-eda-tools / third_party / shuttle / sky130 / mpw-002 / slot-018 / 9259abc73d4c9aadc87a43faa34268130ad9ffbe / . / verilog / rtl / control_mvp.sv
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// Copyright 2018 ETH Zurich and University of Bologna.
// Copyright and related rights are licensed under the Solderpad Hardware
// License, Version 0.51 (the “License”); you may not use this file except in
// compliance with the License. You may obtain a copy of the License at
// http://solderpad.org/licenses/SHL-0.51. Unless required by applicable law
// or agreed to in writing, software, hardware and materials distributed under
// this License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR
// CONDITIONS OF ANY KIND, either express or implied. See the License for the
// specific language governing permissions and limitations under the License.
////////////////////////////////////////////////////////////////////////////////
// Company: IIS @ ETHZ - Federal Institute of Technology //
// //
// Engineers: Lei Li lile@iis.ee.ethz.ch //
// //
// Additional contributions by: //
// //
// //
// //
// Create Date: 04/03/2018 //
// Design Name: FPU //
// Module Name: control_mvp.sv //
// Project Name: Private FPU //
// Language: SystemVerilog //
// //
// Description: the control logic of div and sqrt //
// //
// Revision Date: 12/04/2018 //
// Lei Li //
// To address some requirements by Stefan and add low power //
// control for special cases //
// Revision Date: 13/04/2018 //
// Lei Li //
// To fix some bug found in Control FSM //
// when Iteration_unit_num_S = 2'b10 //
// //
// //
// //
////////////////////////////////////////////////////////////////////////////////
import defs_div_sqrt_mvp::*;
module control_mvp
(//Input
input logic Clk_CI,
input logic Rst_RBI,
input logic Div_start_SI ,
input logic Sqrt_start_SI,
input logic Start_SI,
input logic Kill_SI,
input logic Special_case_SBI,
input logic Special_case_dly_SBI,
input logic [C_PC-1:0] Precision_ctl_SI,
input logic [1:0] Format_sel_SI,
input logic [C_MANT_FP64:0] Numerator_DI,
input logic [C_EXP_FP64:0] Exp_num_DI,
input logic [C_MANT_FP64:0] Denominator_DI,
input logic [C_EXP_FP64:0] Exp_den_DI,
output logic Div_start_dly_SO ,
output logic Sqrt_start_dly_SO,
output logic Div_enable_SO,
output logic Sqrt_enable_SO,
//To next stage
output logic Full_precision_SO,
output logic FP32_SO,
output logic FP64_SO,
output logic FP16_SO,
output logic FP16ALT_SO,
output logic Ready_SO,
output logic Done_SO,
output logic [C_MANT_FP64+4:0] Mant_result_prenorm_DO,
// output logic [3:0] Round_bit_DO,
output logic [C_EXP_FP64+1:0] Exp_result_prenorm_DO
);
logic [C_MANT_FP64+1+4:0] Partial_remainder_DN,Partial_remainder_DP; //58bits,r=q+2
logic [C_MANT_FP64+4:0] Quotient_DP; //57bits
/////////////////////////////////////////////////////////////////////////////
// Assign Inputs //
/////////////////////////////////////////////////////////////////////////////
logic [C_MANT_FP64+1:0] Numerator_se_D; //sign extension and hidden bit
logic [C_MANT_FP64+1:0] Denominator_se_D; //signa extension and hidden bit
logic [C_MANT_FP64+1:0] Denominator_se_DB; //1's complement
assign Numerator_se_D={1'b0,Numerator_DI};
assign Denominator_se_D={1'b0,Denominator_DI};
always_comb
begin
if(FP32_SO)
begin
Denominator_se_DB={~Denominator_se_D[C_MANT_FP64+1:C_MANT_FP64-C_MANT_FP32], {(C_MANT_FP64-C_MANT_FP32){1'b0}} };
end
else if(FP64_SO) begin
Denominator_se_DB=~Denominator_se_D;
end
else if(FP16_SO) begin
Denominator_se_DB={~Denominator_se_D[C_MANT_FP64+1:C_MANT_FP64-C_MANT_FP16], {(C_MANT_FP64-C_MANT_FP16){1'b0}} };
end
else begin
Denominator_se_DB={~Denominator_se_D[C_MANT_FP64+1:C_MANT_FP64-C_MANT_FP16ALT], {(C_MANT_FP64-C_MANT_FP16ALT){1'b0}} };
end
end
logic [C_MANT_FP64+1:0] Mant_D_sqrt_Norm;
assign Mant_D_sqrt_Norm=Exp_num_DI[0]?{1'b0,Numerator_DI}:{Numerator_DI,1'b0}; //for sqrt
/////////////////////////////////////////////////////////////////////////////
// Format Selection //
/////////////////////////////////////////////////////////////////////////////
logic [1:0] Format_sel_S;
always_ff @(posedge Clk_CI, negedge Rst_RBI)
begin
if(~Rst_RBI)
begin
Format_sel_S<='b0;
end
else if(Start_SI&&Ready_SO)
begin
Format_sel_S<=Format_sel_SI;
end
else
begin
Format_sel_S<=Format_sel_S;
end
end
assign FP32_SO = (Format_sel_S==2'b00);
assign FP64_SO = (Format_sel_S==2'b01);
assign FP16_SO = (Format_sel_S==2'b10);
assign FP16ALT_SO = (Format_sel_S==2'b11);
/////////////////////////////////////////////////////////////////////////////
// Precision Control //
/////////////////////////////////////////////////////////////////////////////
logic [C_PC-1:0] Precision_ctl_S;
always_ff @(posedge Clk_CI, negedge Rst_RBI)
begin
if(~Rst_RBI)
begin
Precision_ctl_S<='b0;
end
else if(Start_SI&&Ready_SO)
begin
Precision_ctl_S<=Precision_ctl_SI;
end
else
begin
Precision_ctl_S<=Precision_ctl_S;
end
end
assign Full_precision_SO = (Precision_ctl_S==6'h00);
logic [5:0] State_ctl_S;
logic [5:0] State_Two_iteration_unit_S;
logic [5:0] State_Four_iteration_unit_S;
assign State_Two_iteration_unit_S = Precision_ctl_S[C_PC-1:1]; //Two iteration units
assign State_Four_iteration_unit_S = Precision_ctl_S[C_PC-1:2]; //Four iteration units
always_comb
begin
case(Iteration_unit_num_S)
//////////////////////one iteration unit, start///////////////////////////////////////
2'b00: //one iteration unit
begin
case(Format_sel_S)
2'b00: //FP32
begin
if(Full_precision_SO)
begin
State_ctl_S = 6'h1b; //24+4 more iterations for rounding bits
end
else
begin
State_ctl_S = Precision_ctl_S;
end
end
2'b01: //FP64
begin
if(Full_precision_SO)
begin
State_ctl_S = 6'h38; //53+4 more iterations for rounding bits
end
else
begin
State_ctl_S = Precision_ctl_S;
end
end
2'b10: //FP16
begin
if(Full_precision_SO)
begin
State_ctl_S = 6'h0e; //11+4 more iterations for rounding bits
end
else
begin
State_ctl_S = Precision_ctl_S;
end
end
2'b11: //FP16ALT
begin
if(Full_precision_SO)
begin
State_ctl_S = 6'h0b; //8+4 more iterations for rounding bits
end
else
begin
State_ctl_S = Precision_ctl_S;
end
end
endcase
end
//////////////////////one iteration unit, end///////////////////////////////////////
//////////////////////two iteration units, start///////////////////////////////////////
2'b01: //two iteration units
begin
case(Format_sel_S)
2'b00: //FP32
begin
if(Full_precision_SO)
begin
State_ctl_S = 6'h0d; //24+4 more iterations for rounding bits
end
else
begin
State_ctl_S = State_Two_iteration_unit_S;
end
end
2'b01: //FP64
begin
if(Full_precision_SO)
begin
State_ctl_S = 6'h1b; //53+3 more iterations for rounding bits
end
else
begin
State_ctl_S = State_Two_iteration_unit_S;
end
end
2'b10: //FP16
begin
if(Full_precision_SO)
begin
State_ctl_S = 6'h06; //11+3 more iterations for rounding bits
end
else
begin
State_ctl_S = State_Two_iteration_unit_S;
end
end
2'b11: //FP16ALT
begin
if(Full_precision_SO)
begin
State_ctl_S = 6'h05; //8+4 more iterations for rounding bits
end
else
begin
State_ctl_S = State_Two_iteration_unit_S;
end
end
endcase
end
//////////////////////two iteration units, end///////////////////////////////////////
//////////////////////three iteration units, start///////////////////////////////////////
2'b10: //three iteration units
begin
case(Format_sel_S)
2'b00: //FP32
begin
case(Precision_ctl_S)
6'h00:
begin
State_ctl_S = 6'h08; //24+3 more iterations for rounding bits
end
6'h06,6'h07,6'h08:
begin
State_ctl_S = 6'h02;
end
6'h09,6'h0a,6'h0b:
begin
State_ctl_S = 6'h03;
end
6'h0c,6'h0d,6'h0e:
begin
State_ctl_S = 6'h04;
end
6'h0f,6'h10,6'h11:
begin
State_ctl_S = 6'h05;
end
6'h12,6'h13,6'h14:
begin
State_ctl_S = 6'h06;
end
6'h15,6'h16,6'h17:
begin
State_ctl_S = 6'h07;
end
default:
begin
State_ctl_S = 6'h08; //24+3 more iterations for rounding bits
end
endcase
end
2'b01: //FP64
begin
case(Precision_ctl_S)
6'h00:
begin
State_ctl_S = 6'h12; //53+4 more iterations for rounding bits
end
6'h06,6'h07,6'h08:
begin
State_ctl_S = 6'h02;
end
6'h09,6'h0a,6'h0b:
begin
State_ctl_S = 6'h03;
end
6'h0c,6'h0d,6'h0e:
begin
State_ctl_S = 6'h04;
end
6'h0f,6'h10,6'h11:
begin
State_ctl_S = 6'h05;
end
6'h12,6'h13,6'h14:
begin
State_ctl_S = 6'h06;
end
6'h15,6'h16,6'h17:
begin
State_ctl_S = 6'h07;
end
6'h18,6'h19,6'h1a:
begin
State_ctl_S = 6'h08;
end
6'h1b,6'h1c,6'h1d:
begin
State_ctl_S = 6'h09;
end
6'h1e,6'h1f,6'h20:
begin
State_ctl_S = 6'h0a;
end
6'h21,6'h22,6'h23:
begin
State_ctl_S = 6'h0b;
end
6'h24,6'h25,6'h26:
begin
State_ctl_S = 6'h0c;
end
6'h27,6'h28,6'h29:
begin
State_ctl_S = 6'h0d;
end
6'h2a,6'h2b,6'h2c:
begin
State_ctl_S = 6'h0e;
end
6'h2d,6'h2e,6'h2f:
begin
State_ctl_S = 6'h0f;
end
6'h30,6'h31,6'h32:
begin
State_ctl_S = 6'h10;
end
6'h33,6'h34,6'h35:
begin
State_ctl_S = 6'h11;
end
default:
begin
State_ctl_S = 6'h12; //53+4 more iterations for rounding bits
end
endcase
end
2'b10: //FP16
begin
case(Precision_ctl_S)
6'h00:
begin
State_ctl_S = 6'h04; //12+3 more iterations for rounding bits
end
6'h06,6'h07,6'h08:
begin
State_ctl_S = 6'h02;
end
6'h09,6'h0a,6'h0b:
begin
State_ctl_S = 6'h03;
end
default:
begin
State_ctl_S = 6'h04; //12+3 more iterations for rounding bits
end
endcase
end
2'b11: //FP16ALT
begin
case(Precision_ctl_S)
6'h00:
begin
State_ctl_S = 6'h03; //8+4 more iterations for rounding bits
end
6'h06,6'h07,6'h08:
begin
State_ctl_S = 6'h02;
end
default:
begin
State_ctl_S = 6'h03; //8+4 more iterations for rounding bits
end
endcase
end
endcase
end
//////////////////////three iteration units, end///////////////////////////////////////
//////////////////////four iteration units, start///////////////////////////////////////
2'b11: //four iteration units
begin
case(Format_sel_S)
2'b00: //FP32
begin
if(Full_precision_SO)
begin
State_ctl_S = 6'h06; //24+4 more iterations for rounding bits
end
else
begin
State_ctl_S = State_Four_iteration_unit_S;
end
end
2'b01: //FP64
begin
if(Full_precision_SO)
begin
State_ctl_S = 6'h0d; //53+3 more iterations for rounding bits
end
else
begin
State_ctl_S = State_Four_iteration_unit_S;
end
end
2'b10: //FP16
begin
if(Full_precision_SO)
begin
State_ctl_S = 6'h03; //11+4 more iterations for rounding bits
end
else
begin
State_ctl_S = State_Four_iteration_unit_S;
end
end
2'b11: //FP16ALT
begin
if(Full_precision_SO)
begin
State_ctl_S = 6'h02; //8+4 more iterations for rounding bits
end
else
begin
State_ctl_S = State_Four_iteration_unit_S;
end
end
endcase
end
//////////////////////four iteration units, end///////////////////////////////////////
endcase
end
/////////////////////////////////////////////////////////////////////////////
// control logic //
/////////////////////////////////////////////////////////////////////////////
logic Div_start_dly_S;
always_ff @(posedge Clk_CI, negedge Rst_RBI) // generate Div_start_dly_S signal
begin
if(~Rst_RBI)
begin
Div_start_dly_S<=1'b0;
end
else if(Div_start_SI&&Ready_SO)
begin
Div_start_dly_S<=1'b1;
end
else
begin
Div_start_dly_S<=1'b0;
end
end
assign Div_start_dly_SO=Div_start_dly_S;
always_ff @(posedge Clk_CI, negedge Rst_RBI) begin // generate Div_enable_SO signal
if(~Rst_RBI)
Div_enable_SO<=1'b0;
// Synchronous rst_ni with Flush
else if (Kill_SI)
Div_enable_SO <= 1'b0;
else if(Div_start_SI&&Ready_SO)
Div_enable_SO<=1'b1;
else if(Done_SO)
Div_enable_SO<=1'b0;
else
Div_enable_SO<=Div_enable_SO;
end
logic Sqrt_start_dly_S;
always_ff @(posedge Clk_CI, negedge Rst_RBI) // generate Sqrt_start_dly_SI signal
begin
if(~Rst_RBI)
begin
Sqrt_start_dly_S<=1'b0;
end
else if(Sqrt_start_SI&&Ready_SO)
begin
Sqrt_start_dly_S<=1'b1;
end
else
begin
Sqrt_start_dly_S<=1'b0;
end
end
assign Sqrt_start_dly_SO=Sqrt_start_dly_S;
always_ff @(posedge Clk_CI, negedge Rst_RBI) begin // generate Sqrt_enable_SO signal
if(~Rst_RBI)
Sqrt_enable_SO<=1'b0;
else if (Kill_SI)
Sqrt_enable_SO <= 1'b0;
else if(Sqrt_start_SI&&Ready_SO)
Sqrt_enable_SO<=1'b1;
else if(Done_SO)
Sqrt_enable_SO<=1'b0;
else
Sqrt_enable_SO<=Sqrt_enable_SO;
end
logic [5:0] Crtl_cnt_S;
logic Start_dly_S;
assign Start_dly_S=Div_start_dly_S |Sqrt_start_dly_S;
logic Fsm_enable_S;
assign Fsm_enable_S=( (Start_dly_S | (| Crtl_cnt_S)) && (~Kill_SI) && Special_case_dly_SBI);
logic Final_state_S;
assign Final_state_S= (Crtl_cnt_S==State_ctl_S);
always_ff @(posedge Clk_CI, negedge Rst_RBI) //control_FSM
begin
if (~Rst_RBI)
begin
Crtl_cnt_S <= '0;
end
else if (Final_state_S | Kill_SI)
begin
Crtl_cnt_S <= '0;
end
else if(Fsm_enable_S) // one cycle Start_SI
begin
Crtl_cnt_S <= Crtl_cnt_S+1;
end
else
begin
Crtl_cnt_S <= '0;
end
end // always_ff
always_ff @(posedge Clk_CI, negedge Rst_RBI) //Generate Done_SO, they can share this Done_SO.
begin
if(~Rst_RBI)
begin
Done_SO<=1'b0;
end
else if(Start_SI&&Ready_SO)
begin
if(~Special_case_SBI)
begin
Done_SO<=1'b1;
end
else
begin
Done_SO<=1'b0;
end
end
else if(Final_state_S)
begin
Done_SO<=1'b1;
end
else
begin
Done_SO<=1'b0;
end
end
always_ff @(posedge Clk_CI, negedge Rst_RBI) //Generate Ready_SO
begin
if(~Rst_RBI)
begin
Ready_SO<=1'b1;
end
else if(Start_SI&&Ready_SO)
begin
if(~Special_case_SBI)
begin
Ready_SO<=1'b1;
end
else
begin
Ready_SO<=1'b0;
end
end
else if(Final_state_S | Kill_SI)
begin
Ready_SO<=1'b1;
end
else
begin
Ready_SO<=Ready_SO;
end
end
/////////////////////////////////////////////////////////////////////////////
// Declarations for square root when Iteration_unit_num_S = 2'b00, start //
////////////////////////////////////////////////////////////////////////////
logic Qcnt_one_0;
logic Qcnt_one_1;
logic [1:0] Qcnt_one_2;
logic [2:0] Qcnt_one_3;
logic [3:0] Qcnt_one_4;
logic [4:0] Qcnt_one_5;
logic [5:0] Qcnt_one_6;
logic [6:0] Qcnt_one_7;
logic [7:0] Qcnt_one_8;
logic [8:0] Qcnt_one_9;
logic [9:0] Qcnt_one_10;
logic [10:0] Qcnt_one_11;
logic [11:0] Qcnt_one_12;
logic [12:0] Qcnt_one_13;
logic [13:0] Qcnt_one_14;
logic [14:0] Qcnt_one_15;
logic [15:0] Qcnt_one_16;
logic [16:0] Qcnt_one_17;
logic [17:0] Qcnt_one_18;
logic [18:0] Qcnt_one_19;
logic [19:0] Qcnt_one_20;
logic [20:0] Qcnt_one_21;
logic [21:0] Qcnt_one_22;
logic [22:0] Qcnt_one_23;
logic [23:0] Qcnt_one_24;
logic [24:0] Qcnt_one_25;
logic [25:0] Qcnt_one_26;
logic [26:0] Qcnt_one_27;
logic [27:0] Qcnt_one_28;
logic [28:0] Qcnt_one_29;
logic [29:0] Qcnt_one_30;
logic [30:0] Qcnt_one_31;
logic [31:0] Qcnt_one_32;
logic [32:0] Qcnt_one_33;
logic [33:0] Qcnt_one_34;
logic [34:0] Qcnt_one_35;
logic [35:0] Qcnt_one_36;
logic [36:0] Qcnt_one_37;
logic [37:0] Qcnt_one_38;
logic [38:0] Qcnt_one_39;
logic [39:0] Qcnt_one_40;
logic [40:0] Qcnt_one_41;
logic [41:0] Qcnt_one_42;
logic [42:0] Qcnt_one_43;
logic [43:0] Qcnt_one_44;
logic [44:0] Qcnt_one_45;
logic [45:0] Qcnt_one_46;
logic [46:0] Qcnt_one_47;
logic [47:0] Qcnt_one_48;
logic [48:0] Qcnt_one_49;
logic [49:0] Qcnt_one_50;
logic [50:0] Qcnt_one_51;
logic [51:0] Qcnt_one_52;
logic [52:0] Qcnt_one_53;
logic [53:0] Qcnt_one_54;
logic [54:0] Qcnt_one_55;
logic [55:0] Qcnt_one_56;
logic [56:0] Qcnt_one_57;
logic [57:0] Qcnt_one_58;
logic [58:0] Qcnt_one_59;
logic [59:0] Qcnt_one_60;
/////////////////////////////////////////////////////////////////////////////
// Declarations for square root when Iteration_unit_num_S = 2'b00, end //
////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////
// Declarations for square root when Iteration_unit_num_S = 2'b01, start //
////////////////////////////////////////////////////////////////////////////
logic [1:0] Qcnt_two_0;
logic [2:0] Qcnt_two_1;
logic [4:0] Qcnt_two_2;
logic [6:0] Qcnt_two_3;
logic [8:0] Qcnt_two_4;
logic [10:0] Qcnt_two_5;
logic [12:0] Qcnt_two_6;
logic [14:0] Qcnt_two_7;
logic [16:0] Qcnt_two_8;
logic [18:0] Qcnt_two_9;
logic [20:0] Qcnt_two_10;
logic [22:0] Qcnt_two_11;
logic [24:0] Qcnt_two_12;
logic [26:0] Qcnt_two_13;
logic [28:0] Qcnt_two_14;
logic [30:0] Qcnt_two_15;
logic [32:0] Qcnt_two_16;
logic [34:0] Qcnt_two_17;
logic [36:0] Qcnt_two_18;
logic [38:0] Qcnt_two_19;
logic [40:0] Qcnt_two_20;
logic [42:0] Qcnt_two_21;
logic [44:0] Qcnt_two_22;
logic [46:0] Qcnt_two_23;
logic [48:0] Qcnt_two_24;
logic [50:0] Qcnt_two_25;
logic [52:0] Qcnt_two_26;
logic [54:0] Qcnt_two_27;
logic [56:0] Qcnt_two_28;
/////////////////////////////////////////////////////////////////////////////
// Declarations for square root when Iteration_unit_num_S = 2'b01, end //
////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////
// Declarations for square root when Iteration_unit_num_S = 2'b10, start //
////////////////////////////////////////////////////////////////////////////
logic [2:0] Qcnt_three_0;
logic [4:0] Qcnt_three_1;
logic [7:0] Qcnt_three_2;
logic [10:0] Qcnt_three_3;
logic [13:0] Qcnt_three_4;
logic [16:0] Qcnt_three_5;
logic [19:0] Qcnt_three_6;
logic [22:0] Qcnt_three_7;
logic [25:0] Qcnt_three_8;
logic [28:0] Qcnt_three_9;
logic [31:0] Qcnt_three_10;
logic [34:0] Qcnt_three_11;
logic [37:0] Qcnt_three_12;
logic [40:0] Qcnt_three_13;
logic [43:0] Qcnt_three_14;
logic [46:0] Qcnt_three_15;
logic [49:0] Qcnt_three_16;
logic [52:0] Qcnt_three_17;
logic [55:0] Qcnt_three_18;
logic [58:0] Qcnt_three_19;
logic [61:0] Qcnt_three_20;
/////////////////////////////////////////////////////////////////////////////
// Declarations for square root when Iteration_unit_num_S = 2'b10, end //
////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////
// Declarations for square root when Iteration_unit_num_S = 2'b11, start //
////////////////////////////////////////////////////////////////////////////
logic [3:0] Qcnt_four_0;
logic [6:0] Qcnt_four_1;
logic [10:0] Qcnt_four_2;
logic [14:0] Qcnt_four_3;
logic [18:0] Qcnt_four_4;
logic [22:0] Qcnt_four_5;
logic [26:0] Qcnt_four_6;
logic [30:0] Qcnt_four_7;
logic [34:0] Qcnt_four_8;
logic [38:0] Qcnt_four_9;
logic [42:0] Qcnt_four_10;
logic [46:0] Qcnt_four_11;
logic [50:0] Qcnt_four_12;
logic [54:0] Qcnt_four_13;
logic [58:0] Qcnt_four_14;
/////////////////////////////////////////////////////////////////////////////
// Declarations for square root when Iteration_unit_num_S = 2'b11, end //
////////////////////////////////////////////////////////////////////////////
logic [C_MANT_FP64+1+4:0] Sqrt_R0,Sqrt_Q0,Q_sqrt0,Q_sqrt_com_0;
logic [C_MANT_FP64+1+4:0] Sqrt_R1,Sqrt_Q1,Q_sqrt1,Q_sqrt_com_1;
logic [C_MANT_FP64+1+4:0] Sqrt_R2,Sqrt_Q2,Q_sqrt2,Q_sqrt_com_2;
logic [C_MANT_FP64+1+4:0] Sqrt_R3,Sqrt_Q3,Q_sqrt3,Q_sqrt_com_3,Sqrt_R4; //Sqrt_Q4;
logic [1:0] Sqrt_DI [3:0];
logic [1:0] Sqrt_DO [3:0];
logic Sqrt_carry_DO;
logic [C_MANT_FP64+1+4:0] Iteration_cell_a_D [3:0];
logic [C_MANT_FP64+1+4:0] Iteration_cell_b_D [3:0];
logic [C_MANT_FP64+1+4:0] Iteration_cell_a_BMASK_D [3:0];
logic [C_MANT_FP64+1+4:0] Iteration_cell_b_BMASK_D [3:0];
logic Iteration_cell_carry_D [3:0];
logic [C_MANT_FP64+1+4:0] Iteration_cell_sum_D [3:0];
logic [C_MANT_FP64+1+4:0] Iteration_cell_sum_AMASK_D [3:0];
logic [3:0] Sqrt_quotinent_S;
always_comb
begin //
case (Format_sel_S)
2'b00:
begin
Sqrt_quotinent_S = {(~Iteration_cell_sum_AMASK_D[0][C_MANT_FP32+5]),(~Iteration_cell_sum_AMASK_D[1][C_MANT_FP32+5]),(~Iteration_cell_sum_AMASK_D[2][C_MANT_FP32+5]),(~Iteration_cell_sum_AMASK_D[3][C_MANT_FP32+5])};
Q_sqrt_com_0 ={ {(C_MANT_FP64-C_MANT_FP32){1'b0}},~Q_sqrt0[C_MANT_FP32+5:0] };
Q_sqrt_com_1 ={ {(C_MANT_FP64-C_MANT_FP32){1'b0}},~Q_sqrt1[C_MANT_FP32+5:0] };
Q_sqrt_com_2 ={ {(C_MANT_FP64-C_MANT_FP32){1'b0}},~Q_sqrt2[C_MANT_FP32+5:0] };
Q_sqrt_com_3 ={ {(C_MANT_FP64-C_MANT_FP32){1'b0}},~Q_sqrt3[C_MANT_FP32+5:0] };
end
2'b01:
begin
Sqrt_quotinent_S = {Iteration_cell_carry_D[0],Iteration_cell_carry_D[1],Iteration_cell_carry_D[2],Iteration_cell_carry_D[3]};
Q_sqrt_com_0=~Q_sqrt0;
Q_sqrt_com_1=~Q_sqrt1;
Q_sqrt_com_2=~Q_sqrt2;
Q_sqrt_com_3=~Q_sqrt3;
end
2'b10:
begin
Sqrt_quotinent_S = {(~Iteration_cell_sum_AMASK_D[0][C_MANT_FP16+5]),(~Iteration_cell_sum_AMASK_D[1][C_MANT_FP16+5]),(~Iteration_cell_sum_AMASK_D[2][C_MANT_FP16+5]),(~Iteration_cell_sum_AMASK_D[3][C_MANT_FP16+5])};
Q_sqrt_com_0 ={ {(C_MANT_FP64-C_MANT_FP16){1'b0}},~Q_sqrt0[C_MANT_FP16+5:0] };
Q_sqrt_com_1 ={ {(C_MANT_FP64-C_MANT_FP16){1'b0}},~Q_sqrt1[C_MANT_FP16+5:0] };
Q_sqrt_com_2 ={ {(C_MANT_FP64-C_MANT_FP16){1'b0}},~Q_sqrt2[C_MANT_FP16+5:0] };
Q_sqrt_com_3 ={ {(C_MANT_FP64-C_MANT_FP16){1'b0}},~Q_sqrt3[C_MANT_FP16+5:0] };
end
2'b11:
begin
Sqrt_quotinent_S = {(~Iteration_cell_sum_AMASK_D[0][C_MANT_FP16ALT+5]),(~Iteration_cell_sum_AMASK_D[1][C_MANT_FP16ALT+5]),(~Iteration_cell_sum_AMASK_D[2][C_MANT_FP16ALT+5]),(~Iteration_cell_sum_AMASK_D[3][C_MANT_FP16ALT+5])};
Q_sqrt_com_0 ={ {(C_MANT_FP64-C_MANT_FP16ALT){1'b0}},~Q_sqrt0[C_MANT_FP16ALT+5:0] };
Q_sqrt_com_1 ={ {(C_MANT_FP64-C_MANT_FP16ALT){1'b0}},~Q_sqrt1[C_MANT_FP16ALT+5:0] };
Q_sqrt_com_2 ={ {(C_MANT_FP64-C_MANT_FP16ALT){1'b0}},~Q_sqrt2[C_MANT_FP16ALT+5:0] };
Q_sqrt_com_3 ={ {(C_MANT_FP64-C_MANT_FP16ALT){1'b0}},~Q_sqrt3[C_MANT_FP16ALT+5:0] };
end
endcase
end
assign Qcnt_one_0= {1'b0}; //qk for each feedback
assign Qcnt_one_1= {Quotient_DP[0]};
assign Qcnt_one_2= {Quotient_DP[1:0]};
assign Qcnt_one_3= {Quotient_DP[2:0]};
assign Qcnt_one_4= {Quotient_DP[3:0]};
assign Qcnt_one_5= {Quotient_DP[4:0]};
assign Qcnt_one_6= {Quotient_DP[5:0]};
assign Qcnt_one_7= {Quotient_DP[6:0]};
assign Qcnt_one_8= {Quotient_DP[7:0]};
assign Qcnt_one_9= {Quotient_DP[8:0]};
assign Qcnt_one_10= {Quotient_DP[9:0]};
assign Qcnt_one_11= {Quotient_DP[10:0]};
assign Qcnt_one_12= {Quotient_DP[11:0]};
assign Qcnt_one_13= {Quotient_DP[12:0]};
assign Qcnt_one_14= {Quotient_DP[13:0]};
assign Qcnt_one_15= {Quotient_DP[14:0]};
assign Qcnt_one_16= {Quotient_DP[15:0]};
assign Qcnt_one_17= {Quotient_DP[16:0]};
assign Qcnt_one_18= {Quotient_DP[17:0]};
assign Qcnt_one_19= {Quotient_DP[18:0]};
assign Qcnt_one_20= {Quotient_DP[19:0]};
assign Qcnt_one_21= {Quotient_DP[20:0]};
assign Qcnt_one_22= {Quotient_DP[21:0]};
assign Qcnt_one_23= {Quotient_DP[22:0]};
assign Qcnt_one_24= {Quotient_DP[23:0]};
assign Qcnt_one_25= {Quotient_DP[24:0]};
assign Qcnt_one_26= {Quotient_DP[25:0]};
assign Qcnt_one_27= {Quotient_DP[26:0]};
assign Qcnt_one_28= {Quotient_DP[27:0]};
assign Qcnt_one_29= {Quotient_DP[28:0]};
assign Qcnt_one_30= {Quotient_DP[29:0]};
assign Qcnt_one_31= {Quotient_DP[30:0]};
assign Qcnt_one_32= {Quotient_DP[31:0]};
assign Qcnt_one_33= {Quotient_DP[32:0]};
assign Qcnt_one_34= {Quotient_DP[33:0]};
assign Qcnt_one_35= {Quotient_DP[34:0]};
assign Qcnt_one_36= {Quotient_DP[35:0]};
assign Qcnt_one_37= {Quotient_DP[36:0]};
assign Qcnt_one_38= {Quotient_DP[37:0]};
assign Qcnt_one_39= {Quotient_DP[38:0]};
assign Qcnt_one_40= {Quotient_DP[39:0]};
assign Qcnt_one_41= {Quotient_DP[40:0]};
assign Qcnt_one_42= {Quotient_DP[41:0]};
assign Qcnt_one_43= {Quotient_DP[42:0]};
assign Qcnt_one_44= {Quotient_DP[43:0]};
assign Qcnt_one_45= {Quotient_DP[44:0]};
assign Qcnt_one_46= {Quotient_DP[45:0]};
assign Qcnt_one_47= {Quotient_DP[46:0]};
assign Qcnt_one_48= {Quotient_DP[47:0]};
assign Qcnt_one_49= {Quotient_DP[48:0]};
assign Qcnt_one_50= {Quotient_DP[49:0]};
assign Qcnt_one_51= {Quotient_DP[50:0]};
assign Qcnt_one_52= {Quotient_DP[51:0]};
assign Qcnt_one_53= {Quotient_DP[52:0]};
assign Qcnt_one_54= {Quotient_DP[53:0]};
assign Qcnt_one_55= {Quotient_DP[54:0]};
assign Qcnt_one_56= {Quotient_DP[55:0]};
assign Qcnt_one_57= {Quotient_DP[56:0]};
assign Qcnt_two_0 = {1'b0, Sqrt_quotinent_S[3]}; //qk for each feedback
assign Qcnt_two_1 = {Quotient_DP[1:0],Sqrt_quotinent_S[3]};
assign Qcnt_two_2 = {Quotient_DP[3:0],Sqrt_quotinent_S[3]};
assign Qcnt_two_3 = {Quotient_DP[5:0],Sqrt_quotinent_S[3]};
assign Qcnt_two_4 = {Quotient_DP[7:0],Sqrt_quotinent_S[3]};
assign Qcnt_two_5 = {Quotient_DP[9:0],Sqrt_quotinent_S[3]};
assign Qcnt_two_6 = {Quotient_DP[11:0],Sqrt_quotinent_S[3]};
assign Qcnt_two_7 = {Quotient_DP[13:0],Sqrt_quotinent_S[3]};
assign Qcnt_two_8 = {Quotient_DP[15:0],Sqrt_quotinent_S[3]};
assign Qcnt_two_9 = {Quotient_DP[17:0],Sqrt_quotinent_S[3]};
assign Qcnt_two_10 = {Quotient_DP[19:0],Sqrt_quotinent_S[3]};
assign Qcnt_two_11 = {Quotient_DP[21:0],Sqrt_quotinent_S[3]};
assign Qcnt_two_12 = {Quotient_DP[23:0],Sqrt_quotinent_S[3]};
assign Qcnt_two_13 = {Quotient_DP[25:0],Sqrt_quotinent_S[3]};
assign Qcnt_two_14 = {Quotient_DP[27:0],Sqrt_quotinent_S[3]};
assign Qcnt_two_15 = {Quotient_DP[29:0],Sqrt_quotinent_S[3]};
assign Qcnt_two_16 = {Quotient_DP[31:0],Sqrt_quotinent_S[3]};
assign Qcnt_two_17 = {Quotient_DP[33:0],Sqrt_quotinent_S[3]};
assign Qcnt_two_18 = {Quotient_DP[35:0],Sqrt_quotinent_S[3]};
assign Qcnt_two_19 = {Quotient_DP[37:0],Sqrt_quotinent_S[3]};
assign Qcnt_two_20 = {Quotient_DP[39:0],Sqrt_quotinent_S[3]};
assign Qcnt_two_21 = {Quotient_DP[41:0],Sqrt_quotinent_S[3]};
assign Qcnt_two_22 = {Quotient_DP[43:0],Sqrt_quotinent_S[3]};
assign Qcnt_two_23 = {Quotient_DP[45:0],Sqrt_quotinent_S[3]};
assign Qcnt_two_24 = {Quotient_DP[47:0],Sqrt_quotinent_S[3]};
assign Qcnt_two_25 = {Quotient_DP[49:0],Sqrt_quotinent_S[3]};
assign Qcnt_two_26 = {Quotient_DP[51:0],Sqrt_quotinent_S[3]};
assign Qcnt_two_27 = {Quotient_DP[53:0],Sqrt_quotinent_S[3]};
assign Qcnt_two_28 = {Quotient_DP[55:0],Sqrt_quotinent_S[3]};
assign Qcnt_three_0 = {1'b0, Sqrt_quotinent_S[3],Sqrt_quotinent_S[2]}; //qk for each feedback
assign Qcnt_three_1 = {Quotient_DP[2:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2]};
assign Qcnt_three_2 = {Quotient_DP[5:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2]};
assign Qcnt_three_3 = {Quotient_DP[8:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2]};
assign Qcnt_three_4 = {Quotient_DP[11:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2]};
assign Qcnt_three_5 = {Quotient_DP[14:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2]};
assign Qcnt_three_6 = {Quotient_DP[17:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2]};
assign Qcnt_three_7 = {Quotient_DP[20:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2]};
assign Qcnt_three_8 = {Quotient_DP[23:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2]};
assign Qcnt_three_9 = {Quotient_DP[26:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2]};
assign Qcnt_three_10 = {Quotient_DP[29:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2]};
assign Qcnt_three_11 = {Quotient_DP[32:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2]};
assign Qcnt_three_12 = {Quotient_DP[35:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2]};
assign Qcnt_three_13 = {Quotient_DP[38:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2]};
assign Qcnt_three_14 = {Quotient_DP[41:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2]};
assign Qcnt_three_15 = {Quotient_DP[44:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2]};
assign Qcnt_three_16 = {Quotient_DP[47:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2]};
assign Qcnt_three_17 = {Quotient_DP[50:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2]};
assign Qcnt_three_18 = {Quotient_DP[53:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2]};
assign Qcnt_three_19 = {Quotient_DP[56:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2]};
assign Qcnt_four_0 = {1'b0, Sqrt_quotinent_S[3],Sqrt_quotinent_S[2],Sqrt_quotinent_S[1]};
assign Qcnt_four_1 = {Quotient_DP[3:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2],Sqrt_quotinent_S[1]};
assign Qcnt_four_2 = {Quotient_DP[7:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2],Sqrt_quotinent_S[1]};
assign Qcnt_four_3 = {Quotient_DP[11:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2],Sqrt_quotinent_S[1]};
assign Qcnt_four_4 = {Quotient_DP[15:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2],Sqrt_quotinent_S[1]};
assign Qcnt_four_5 = {Quotient_DP[19:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2],Sqrt_quotinent_S[1]};
assign Qcnt_four_6 = {Quotient_DP[23:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2],Sqrt_quotinent_S[1]};
assign Qcnt_four_7 = {Quotient_DP[27:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2],Sqrt_quotinent_S[1]};
assign Qcnt_four_8 = {Quotient_DP[31:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2],Sqrt_quotinent_S[1]};
assign Qcnt_four_9 = {Quotient_DP[35:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2],Sqrt_quotinent_S[1]};
assign Qcnt_four_10 = {Quotient_DP[39:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2],Sqrt_quotinent_S[1]};
assign Qcnt_four_11 = {Quotient_DP[43:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2],Sqrt_quotinent_S[1]};
assign Qcnt_four_12 = {Quotient_DP[47:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2],Sqrt_quotinent_S[1]};
assign Qcnt_four_13 = {Quotient_DP[51:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2],Sqrt_quotinent_S[1]};
assign Qcnt_four_14 = {Quotient_DP[55:0],Sqrt_quotinent_S[3],Sqrt_quotinent_S[2],Sqrt_quotinent_S[1]};
always_comb begin // the intermediate operands for sqrt
case(Iteration_unit_num_S)
2'b00:
begin
/////////////////////////////////////////////////////////////////////////////
// Operands for square root when Iteration_unit_num_S = 2'b00, start //
/////////////////////////////////////////////////////////////////////////////
case(Crtl_cnt_S)
6'b000000:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64+1:C_MANT_FP64];
Q_sqrt0={{(C_MANT_FP64+5){1'b0}},Qcnt_one_0};
Sqrt_Q0=Q_sqrt_com_0;
end
6'b000001:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-1:C_MANT_FP64-2];
Q_sqrt0={{(C_MANT_FP64+5){1'b0}},Qcnt_one_1};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b000010:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-3:C_MANT_FP64-4];
Q_sqrt0={{(C_MANT_FP64+4){1'b0}},Qcnt_one_2};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b000011:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-5:C_MANT_FP64-6];
Q_sqrt0={{(C_MANT_FP64+3){1'b0}},Qcnt_one_3};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b000100:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-7:C_MANT_FP64-8];
Q_sqrt0={{(C_MANT_FP64+2){1'b0}},Qcnt_one_4};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b000101:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-9:C_MANT_FP64-10];
Q_sqrt0={{(C_MANT_FP64+1){1'b0}},Qcnt_one_5};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b000110:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-11:C_MANT_FP64-12];
Q_sqrt0={{(C_MANT_FP64){1'b0}},Qcnt_one_6};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b000111:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-13:C_MANT_FP64-14];
Q_sqrt0={{(C_MANT_FP64-1){1'b0}},Qcnt_one_7};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b001000:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-15:C_MANT_FP64-16];
Q_sqrt0={{(C_MANT_FP64-2){1'b0}},Qcnt_one_8};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b001001:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-17:C_MANT_FP64-18];
Q_sqrt0={{(C_MANT_FP64-3){1'b0}},Qcnt_one_9};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b001010:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-19:C_MANT_FP64-20];
Q_sqrt0={{(C_MANT_FP64-4){1'b0}},Qcnt_one_10};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b001011:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-21:C_MANT_FP64-22];
Q_sqrt0={{(C_MANT_FP64-5){1'b0}},Qcnt_one_11};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b001100:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-23:C_MANT_FP64-24];
Q_sqrt0={{(C_MANT_FP64-6){1'b0}},Qcnt_one_12};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b001101:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-25:C_MANT_FP64-26];
Q_sqrt0={{(C_MANT_FP64-7){1'b0}},Qcnt_one_13};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b001110:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-27:C_MANT_FP64-28];
Q_sqrt0={{(C_MANT_FP64-8){1'b0}},Qcnt_one_14};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b001111:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-29:C_MANT_FP64-30];
Q_sqrt0={{(C_MANT_FP64-9){1'b0}},Qcnt_one_15};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b010000:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-31:C_MANT_FP64-32];
Q_sqrt0={{(C_MANT_FP64-10){1'b0}},Qcnt_one_16};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b010001:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-33:C_MANT_FP64-34];
Q_sqrt0={{(C_MANT_FP64-11){1'b0}},Qcnt_one_17};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b010010:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-35:C_MANT_FP64-36];
Q_sqrt0={{(C_MANT_FP64-12){1'b0}},Qcnt_one_18};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b010011:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-37:C_MANT_FP64-38];
Q_sqrt0={{(C_MANT_FP64-13){1'b0}},Qcnt_one_19};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b010100:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-39:C_MANT_FP64-40];
Q_sqrt0={{(C_MANT_FP64-14){1'b0}},Qcnt_one_20};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b010101:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-41:C_MANT_FP64-42];
Q_sqrt0={{(C_MANT_FP64-15){1'b0}},Qcnt_one_21};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b010110:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-43:C_MANT_FP64-44];
Q_sqrt0={{(C_MANT_FP64-16){1'b0}},Qcnt_one_22};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b010111:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-45:C_MANT_FP64-46];
Q_sqrt0={{(C_MANT_FP64-17){1'b0}},Qcnt_one_23};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b011000:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-47:C_MANT_FP64-48];
Q_sqrt0={{(C_MANT_FP64-18){1'b0}},Qcnt_one_24};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b011001:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-49:C_MANT_FP64-50];
Q_sqrt0={{(C_MANT_FP64-19){1'b0}},Qcnt_one_25};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b011010:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-51:C_MANT_FP64-52];
Q_sqrt0={{(C_MANT_FP64-20){1'b0}},Qcnt_one_26};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b011011:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-21){1'b0}},Qcnt_one_27};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b011100:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-22){1'b0}},Qcnt_one_28};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b011101:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-23){1'b0}},Qcnt_one_29};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b011110:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-24){1'b0}},Qcnt_one_30};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b011111:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-25){1'b0}},Qcnt_one_31};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b100000:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-26){1'b0}},Qcnt_one_32};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b100001:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-27){1'b0}},Qcnt_one_33};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b100010:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-28){1'b0}},Qcnt_one_34};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b100011:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-29){1'b0}},Qcnt_one_35};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b100100:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-30){1'b0}},Qcnt_one_36};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b100101:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-31){1'b0}},Qcnt_one_37};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b100110:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-32){1'b0}},Qcnt_one_38};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b100111:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-33){1'b0}},Qcnt_one_39};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b101000:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-34){1'b0}},Qcnt_one_40};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b101001:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-35){1'b0}},Qcnt_one_41};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b101010:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-36){1'b0}},Qcnt_one_42};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b101011:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-37){1'b0}},Qcnt_one_43};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b101100:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-38){1'b0}},Qcnt_one_44};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b101101:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-39){1'b0}},Qcnt_one_45};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b101110:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-40){1'b0}},Qcnt_one_46};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b101111:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-41){1'b0}},Qcnt_one_47};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b110000:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-42){1'b0}},Qcnt_one_48};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b110001:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-43){1'b0}},Qcnt_one_49};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b110010:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-44){1'b0}},Qcnt_one_50};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b110011:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-45){1'b0}},Qcnt_one_51};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b110100:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-46){1'b0}},Qcnt_one_52};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b110101:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-47){1'b0}},Qcnt_one_53};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b110110:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-48){1'b0}},Qcnt_one_54};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b110111:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-49){1'b0}},Qcnt_one_55};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
6'b111000:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-50){1'b0}},Qcnt_one_56};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
end
default:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0='0;
Sqrt_Q0='0;
end
endcase
end
/////////////////////////////////////////////////////////////////////////////
// Operands for square root when Iteration_unit_num_S = 2'b00, end //
/////////////////////////////////////////////////////////////////////////////
2'b01:
begin
/////////////////////////////////////////////////////////////////////////////
// Operands for square root when Iteration_unit_num_S = 2'b01, start //
/////////////////////////////////////////////////////////////////////////////
case(Crtl_cnt_S)
6'b000000:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64+1:C_MANT_FP64];
Q_sqrt0={{(C_MANT_FP64+5){1'b0}},Qcnt_two_0[1]};
Sqrt_Q0=Q_sqrt_com_0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-1:C_MANT_FP64-2];
Q_sqrt1={{(C_MANT_FP64+4){1'b0}},Qcnt_two_0[1:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
6'b000001:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-3:C_MANT_FP64-4];
Q_sqrt0={{(C_MANT_FP64+4){1'b0}},Qcnt_two_1[2:1]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-5:C_MANT_FP64-6];
Q_sqrt1={{(C_MANT_FP64+3){1'b0}},Qcnt_two_1[2:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
6'b000010:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-7:C_MANT_FP64-8];
Q_sqrt0={{(C_MANT_FP64+2){1'b0}},Qcnt_two_2[4:1]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-9:C_MANT_FP64-10];
Q_sqrt1={{(C_MANT_FP64+1){1'b0}},Qcnt_two_2[4:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
6'b000011:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-11:C_MANT_FP64-12];
Q_sqrt0={{(C_MANT_FP64){1'b0}},Qcnt_two_3[6:1]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-13:C_MANT_FP64-14];
Q_sqrt1={{(C_MANT_FP64-1){1'b0}},Qcnt_two_3[6:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
6'b000100:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-15:C_MANT_FP64-16];
Q_sqrt0={{(C_MANT_FP64-2){1'b0}},Qcnt_two_4[8:1]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-17:C_MANT_FP64-18];
Q_sqrt1={{(C_MANT_FP64-3){1'b0}},Qcnt_two_4[8:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
6'b000101:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-19:C_MANT_FP64-20];
Q_sqrt0={{(C_MANT_FP64-4){1'b0}},Qcnt_two_5[10:1]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-21:C_MANT_FP64-22];
Q_sqrt1={{(C_MANT_FP64-5){1'b0}},Qcnt_two_5[10:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
6'b000110:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-23:C_MANT_FP64-24];
Q_sqrt0={{(C_MANT_FP64-6){1'b0}},Qcnt_two_6[12:1]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-25:C_MANT_FP64-26];
Q_sqrt1={{(C_MANT_FP64-7){1'b0}},Qcnt_two_6[12:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
6'b000111:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-27:C_MANT_FP64-28];
Q_sqrt0={{(C_MANT_FP64-8){1'b0}},Qcnt_two_7[14:1]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-29:C_MANT_FP64-30];
Q_sqrt1={{(C_MANT_FP64-9){1'b0}},Qcnt_two_7[14:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
6'b001000:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-31:C_MANT_FP64-32];
Q_sqrt0={{(C_MANT_FP64-10){1'b0}},Qcnt_two_8[16:1]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-33:C_MANT_FP64-34];
Q_sqrt1={{(C_MANT_FP64-11){1'b0}},Qcnt_two_8[16:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
6'b001001:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-35:C_MANT_FP64-36];
Q_sqrt0={{(C_MANT_FP64-12){1'b0}},Qcnt_two_9[18:1]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-37:C_MANT_FP64-38];
Q_sqrt1={{(C_MANT_FP64-13){1'b0}},Qcnt_two_9[18:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
6'b001010:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-39:C_MANT_FP64-40];
Q_sqrt0={{(C_MANT_FP64-14){1'b0}},Qcnt_two_10[20:1]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-41:C_MANT_FP64-42];
Q_sqrt1={{(C_MANT_FP64-15){1'b0}},Qcnt_two_10[20:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
6'b001011:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-43:C_MANT_FP64-44];
Q_sqrt0={{(C_MANT_FP64-16){1'b0}},Qcnt_two_11[22:1]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-45:C_MANT_FP64-46];
Q_sqrt1={{(C_MANT_FP64-17){1'b0}},Qcnt_two_11[22:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
6'b001100:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-47:C_MANT_FP64-48];
Q_sqrt0={{(C_MANT_FP64-18){1'b0}},Qcnt_two_12[24:1]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-49:C_MANT_FP64-50];
Q_sqrt1={{(C_MANT_FP64-19){1'b0}},Qcnt_two_12[24:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
6'b001101:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-51:C_MANT_FP64-52];
Q_sqrt0={{(C_MANT_FP64-20){1'b0}},Qcnt_two_13[26:1]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-21){1'b0}},Qcnt_two_13[26:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
6'b001110:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-22){1'b0}},Qcnt_two_14[28:1]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-23){1'b0}},Qcnt_two_14[28:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
6'b001111:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-24){1'b0}},Qcnt_two_15[30:1]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-25){1'b0}},Qcnt_two_15[30:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
6'b010000:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-26){1'b0}},Qcnt_two_16[32:1]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-27){1'b0}},Qcnt_two_16[32:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
6'b010001:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-28){1'b0}},Qcnt_two_17[34:1]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-29){1'b0}},Qcnt_two_17[34:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
6'b010010:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-30){1'b0}},Qcnt_two_18[36:1]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-31){1'b0}},Qcnt_two_18[36:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
6'b010011:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-32){1'b0}},Qcnt_two_19[38:1]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-33){1'b0}},Qcnt_two_19[38:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
6'b010100:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-34){1'b0}},Qcnt_two_20[40:1]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-35){1'b0}},Qcnt_two_20[40:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
6'b010101:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-36){1'b0}},Qcnt_two_21[42:1]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-37){1'b0}},Qcnt_two_21[42:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
6'b010110:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-38){1'b0}},Qcnt_two_22[44:1]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-39){1'b0}},Qcnt_two_22[44:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
6'b010111:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-40){1'b0}},Qcnt_two_23[46:1]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-41){1'b0}},Qcnt_two_23[46:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
6'b011000:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-42){1'b0}},Qcnt_two_24[48:1]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-43){1'b0}},Qcnt_two_24[48:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
6'b011001:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-44){1'b0}},Qcnt_two_25[50:1]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-45){1'b0}},Qcnt_two_25[50:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
6'b011010:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-46){1'b0}},Qcnt_two_26[52:1]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-47){1'b0}},Qcnt_two_26[52:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
6'b011011:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-48){1'b0}},Qcnt_two_27[54:1]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-49){1'b0}},Qcnt_two_27[54:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
6'b011100:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-50){1'b0}},Qcnt_two_28[56:1]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-51){1'b0}},Qcnt_two_28[56:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
default:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64+1:C_MANT_FP64];
Q_sqrt0={{(C_MANT_FP64+5){1'b0}},Qcnt_two_0[1]};
Sqrt_Q0=Q_sqrt_com_0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-1:C_MANT_FP64-2];
Q_sqrt1={{(C_MANT_FP64+4){1'b0}},Qcnt_two_0[1:0]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
end
endcase
end
/////////////////////////////////////////////////////////////////////////////
// Operands for square root when Iteration_unit_num_S = 2'b01, end //
/////////////////////////////////////////////////////////////////////////////
2'b10:
begin
/////////////////////////////////////////////////////////////////////////////
// Operands for square root when Iteration_unit_num_S = 2'b10, start //
/////////////////////////////////////////////////////////////////////////////
case(Crtl_cnt_S)
6'b000000:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64+1:C_MANT_FP64];
Q_sqrt0={{(C_MANT_FP64+5){1'b0}},Qcnt_three_0[2]};
Sqrt_Q0=Q_sqrt_com_0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-1:C_MANT_FP64-2];
Q_sqrt1={{(C_MANT_FP64+4){1'b0}},Qcnt_three_0[2:1]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=Mant_D_sqrt_Norm[C_MANT_FP64-3:C_MANT_FP64-4];
Q_sqrt2={{(C_MANT_FP64+3){1'b0}},Qcnt_three_0[2:0]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
end
6'b000001:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-5:C_MANT_FP64-6];
Q_sqrt0={{(C_MANT_FP64+2){1'b0}},Qcnt_three_1[4:2]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-7:C_MANT_FP64-8];
Q_sqrt1={{(C_MANT_FP64+1){1'b0}},Qcnt_three_1[4:1]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=Mant_D_sqrt_Norm[C_MANT_FP64-9:C_MANT_FP64-10];
Q_sqrt2={{(C_MANT_FP64){1'b0}},Qcnt_three_1[4:0]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
end
6'b000010:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-11:C_MANT_FP64-12];
Q_sqrt0={{(C_MANT_FP64-1){1'b0}},Qcnt_three_2[7:2]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-13:C_MANT_FP64-14];
Q_sqrt1={{(C_MANT_FP64-2){1'b0}},Qcnt_three_2[7:1]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=Mant_D_sqrt_Norm[C_MANT_FP64-15:C_MANT_FP64-16];
Q_sqrt2={{(C_MANT_FP64-3){1'b0}},Qcnt_three_2[7:0]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
end
6'b000011:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-17:C_MANT_FP64-18];
Q_sqrt0={{(C_MANT_FP64-4){1'b0}},Qcnt_three_3[10:2]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-19:C_MANT_FP64-20];
Q_sqrt1={{(C_MANT_FP64-5){1'b0}},Qcnt_three_3[10:1]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=Mant_D_sqrt_Norm[C_MANT_FP64-21:C_MANT_FP64-22];
Q_sqrt2={{(C_MANT_FP64-6){1'b0}},Qcnt_three_3[10:0]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
end
6'b000100:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-23:C_MANT_FP64-24];
Q_sqrt0={{(C_MANT_FP64-7){1'b0}},Qcnt_three_4[13:2]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-25:C_MANT_FP64-26];
Q_sqrt1={{(C_MANT_FP64-8){1'b0}},Qcnt_three_4[13:1]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=Mant_D_sqrt_Norm[C_MANT_FP64-27:C_MANT_FP64-28];
Q_sqrt2={{(C_MANT_FP64-9){1'b0}},Qcnt_three_4[13:0]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
end
6'b000101:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-29:C_MANT_FP64-30];
Q_sqrt0={{(C_MANT_FP64-10){1'b0}},Qcnt_three_5[16:2]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-31:C_MANT_FP64-32];
Q_sqrt1={{(C_MANT_FP64-11){1'b0}},Qcnt_three_5[16:1]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=Mant_D_sqrt_Norm[C_MANT_FP64-33:C_MANT_FP64-34];
Q_sqrt2={{(C_MANT_FP64-12){1'b0}},Qcnt_three_5[16:0]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
end
6'b000110:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-35:C_MANT_FP64-36];
Q_sqrt0={{(C_MANT_FP64-13){1'b0}},Qcnt_three_6[19:2]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-37:C_MANT_FP64-38];
Q_sqrt1={{(C_MANT_FP64-14){1'b0}},Qcnt_three_6[19:1]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=Mant_D_sqrt_Norm[C_MANT_FP64-39:C_MANT_FP64-40];
Q_sqrt2={{(C_MANT_FP64-15){1'b0}},Qcnt_three_6[19:0]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
end
6'b000111:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-41:C_MANT_FP64-42];
Q_sqrt0={{(C_MANT_FP64-16){1'b0}},Qcnt_three_7[22:2]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-43:C_MANT_FP64-44];
Q_sqrt1={{(C_MANT_FP64-17){1'b0}},Qcnt_three_7[22:1]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=Mant_D_sqrt_Norm[C_MANT_FP64-45:C_MANT_FP64-46];
Q_sqrt2={{(C_MANT_FP64-18){1'b0}},Qcnt_three_7[22:0]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
end
6'b001000:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-47:C_MANT_FP64-48];
Q_sqrt0={{(C_MANT_FP64-19){1'b0}},Qcnt_three_8[25:2]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-49:C_MANT_FP64-50];
Q_sqrt1={{(C_MANT_FP64-20){1'b0}},Qcnt_three_8[25:1]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=Mant_D_sqrt_Norm[C_MANT_FP64-51:C_MANT_FP64-52];
Q_sqrt2={{(C_MANT_FP64-21){1'b0}},Qcnt_three_8[25:0]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
end
6'b001001:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-22){1'b0}},Qcnt_three_9[28:2]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-23){1'b0}},Qcnt_three_9[28:1]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=2'b00;
Q_sqrt2={{(C_MANT_FP64-24){1'b0}},Qcnt_three_9[28:0]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
end
6'b001010:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-25){1'b0}},Qcnt_three_10[31:2]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-26){1'b0}},Qcnt_three_10[31:1]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=2'b00;
Q_sqrt2={{(C_MANT_FP64-27){1'b0}},Qcnt_three_10[31:0]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
end
6'b001011:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-28){1'b0}},Qcnt_three_11[34:2]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-29){1'b0}},Qcnt_three_11[34:1]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=2'b00;
Q_sqrt2={{(C_MANT_FP64-30){1'b0}},Qcnt_three_11[34:0]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
end
6'b001100:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-31){1'b0}},Qcnt_three_12[37:2]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-32){1'b0}},Qcnt_three_12[37:1]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=2'b00;
Q_sqrt2={{(C_MANT_FP64-33){1'b0}},Qcnt_three_12[37:0]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
end
6'b001101:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-34){1'b0}},Qcnt_three_13[40:2]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-35){1'b0}},Qcnt_three_13[40:1]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=2'b00;
Q_sqrt2={{(C_MANT_FP64-36){1'b0}},Qcnt_three_13[40:0]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
end
6'b001110:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-37){1'b0}},Qcnt_three_14[43:2]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-38){1'b0}},Qcnt_three_14[43:1]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=2'b00;
Q_sqrt2={{(C_MANT_FP64-39){1'b0}},Qcnt_three_14[43:0]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
end
6'b001111:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-40){1'b0}},Qcnt_three_15[46:2]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-41){1'b0}},Qcnt_three_15[46:1]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=2'b00;
Q_sqrt2={{(C_MANT_FP64-42){1'b0}},Qcnt_three_15[46:0]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
end
6'b010000:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-43){1'b0}},Qcnt_three_16[49:2]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-44){1'b0}},Qcnt_three_16[49:1]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=2'b00;
Q_sqrt2={{(C_MANT_FP64-45){1'b0}},Qcnt_three_16[49:0]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
end
6'b010001:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-46){1'b0}},Qcnt_three_17[52:2]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-47){1'b0}},Qcnt_three_17[52:1]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=2'b00;
Q_sqrt2={{(C_MANT_FP64-48){1'b0}},Qcnt_three_17[52:0]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
end
6'b010010:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-49){1'b0}},Qcnt_three_18[55:2]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-50){1'b0}},Qcnt_three_18[55:1]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=2'b00;
Q_sqrt2={{(C_MANT_FP64-51){1'b0}},Qcnt_three_18[55:0]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
end
default :
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64+1:C_MANT_FP64];
Q_sqrt0={{(C_MANT_FP64+5){1'b0}},Qcnt_three_0[2]};
Sqrt_Q0=Q_sqrt_com_0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-1:C_MANT_FP64-2];
Q_sqrt1={{(C_MANT_FP64+4){1'b0}},Qcnt_three_0[2:1]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=Mant_D_sqrt_Norm[C_MANT_FP64-3:C_MANT_FP64-4];
Q_sqrt2={{(C_MANT_FP64+3){1'b0}},Qcnt_three_0[2:0]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
end
endcase
end
/////////////////////////////////////////////////////////////////////////////
// Operands for square root when Iteration_unit_num_S = 2'b10, end //
/////////////////////////////////////////////////////////////////////////////
2'b11:
begin
/////////////////////////////////////////////////////////////////////////////
// Operands for square root when Iteration_unit_num_S = 2'b11, start //
/////////////////////////////////////////////////////////////////////////////
case(Crtl_cnt_S)
6'b000000:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64+1:C_MANT_FP64];
Q_sqrt0={{(C_MANT_FP64+5){1'b0}},Qcnt_four_0[3]};
Sqrt_Q0=Q_sqrt_com_0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-1:C_MANT_FP64-2];
Q_sqrt1={{(C_MANT_FP64+4){1'b0}},Qcnt_four_0[3:2]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=Mant_D_sqrt_Norm[C_MANT_FP64-3:C_MANT_FP64-4];
Q_sqrt2={{(C_MANT_FP64+3){1'b0}},Qcnt_four_0[3:1]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
Sqrt_DI[3]=Mant_D_sqrt_Norm[C_MANT_FP64-5:C_MANT_FP64-6];
Q_sqrt3={{(C_MANT_FP64+2){1'b0}},Qcnt_four_0[3:0]};
Sqrt_Q3=Sqrt_quotinent_S[1]?Q_sqrt_com_3:Q_sqrt3;
end
6'b000001:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-7:C_MANT_FP64-8];
Q_sqrt0={{(C_MANT_FP64+1){1'b0}},Qcnt_four_1[6:3]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-9:C_MANT_FP64-10];
Q_sqrt1={{(C_MANT_FP64){1'b0}},Qcnt_four_1[6:2]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=Mant_D_sqrt_Norm[C_MANT_FP64-11:C_MANT_FP64-12];
Q_sqrt2={{(C_MANT_FP64-1){1'b0}},Qcnt_four_1[6:1]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
Sqrt_DI[3]=Mant_D_sqrt_Norm[C_MANT_FP64-13:C_MANT_FP64-14];
Q_sqrt3={{(C_MANT_FP64-2){1'b0}},Qcnt_four_1[6:0]};
Sqrt_Q3=Sqrt_quotinent_S[1]?Q_sqrt_com_3:Q_sqrt3;
end
6'b000010:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-15:C_MANT_FP64-16];
Q_sqrt0={{(C_MANT_FP64-3){1'b0}},Qcnt_four_2[10:3]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-17:C_MANT_FP64-18];
Q_sqrt1={{(C_MANT_FP64-4){1'b0}},Qcnt_four_2[10:2]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=Mant_D_sqrt_Norm[C_MANT_FP64-19:C_MANT_FP64-20];
Q_sqrt2={{(C_MANT_FP64-5){1'b0}},Qcnt_four_2[10:1]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
Sqrt_DI[3]=Mant_D_sqrt_Norm[C_MANT_FP64-21:C_MANT_FP64-22];
Q_sqrt3={{(C_MANT_FP64-6){1'b0}},Qcnt_four_2[10:0]};
Sqrt_Q3=Sqrt_quotinent_S[1]?Q_sqrt_com_3:Q_sqrt3;
end
6'b000011:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-23:C_MANT_FP64-24];
Q_sqrt0={{(C_MANT_FP64-7){1'b0}},Qcnt_four_3[14:3]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-25:C_MANT_FP64-26];
Q_sqrt1={{(C_MANT_FP64-8){1'b0}},Qcnt_four_3[14:2]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=Mant_D_sqrt_Norm[C_MANT_FP64-27:C_MANT_FP64-28];
Q_sqrt2={{(C_MANT_FP64-9){1'b0}},Qcnt_four_3[14:1]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
Sqrt_DI[3]=Mant_D_sqrt_Norm[C_MANT_FP64-29:C_MANT_FP64-30];
Q_sqrt3={{(C_MANT_FP64-10){1'b0}},Qcnt_four_3[14:0]};
Sqrt_Q3=Sqrt_quotinent_S[1]?Q_sqrt_com_3:Q_sqrt3;
end
6'b000100:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-31:C_MANT_FP64-32];
Q_sqrt0={{(C_MANT_FP64-11){1'b0}},Qcnt_four_4[18:3]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-33:C_MANT_FP64-34];
Q_sqrt1={{(C_MANT_FP64-12){1'b0}},Qcnt_four_4[18:2]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=Mant_D_sqrt_Norm[C_MANT_FP64-35:C_MANT_FP64-36];
Q_sqrt2={{(C_MANT_FP64-13){1'b0}},Qcnt_four_4[18:1]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
Sqrt_DI[3]=Mant_D_sqrt_Norm[C_MANT_FP64-37:C_MANT_FP64-38];
Q_sqrt3={{(C_MANT_FP64-14){1'b0}},Qcnt_four_4[18:0]};
Sqrt_Q3=Sqrt_quotinent_S[1]?Q_sqrt_com_3:Q_sqrt3;
end
6'b000101:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-39:C_MANT_FP64-40];
Q_sqrt0={{(C_MANT_FP64-15){1'b0}},Qcnt_four_5[22:3]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-41:C_MANT_FP64-42];
Q_sqrt1={{(C_MANT_FP64-16){1'b0}},Qcnt_four_5[22:2]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=Mant_D_sqrt_Norm[C_MANT_FP64-43:C_MANT_FP64-44];
Q_sqrt2={{(C_MANT_FP64-17){1'b0}},Qcnt_four_5[22:1]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
Sqrt_DI[3]=Mant_D_sqrt_Norm[C_MANT_FP64-45:C_MANT_FP64-46];
Q_sqrt3={{(C_MANT_FP64-18){1'b0}},Qcnt_four_5[22:0]};
Sqrt_Q3=Sqrt_quotinent_S[1]?Q_sqrt_com_3:Q_sqrt3;
end
6'b000110:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64-47:C_MANT_FP64-48];
Q_sqrt0={{(C_MANT_FP64-19){1'b0}},Qcnt_four_6[26:3]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-49:C_MANT_FP64-50];
Q_sqrt1={{(C_MANT_FP64-20){1'b0}},Qcnt_four_6[26:2]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=Mant_D_sqrt_Norm[C_MANT_FP64-51:C_MANT_FP64-52];
Q_sqrt2={{(C_MANT_FP64-21){1'b0}},Qcnt_four_6[26:1]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
Sqrt_DI[3]=2'b00;
Q_sqrt3={{(C_MANT_FP64-22){1'b0}},Qcnt_four_6[26:0]};
Sqrt_Q3=Sqrt_quotinent_S[1]?Q_sqrt_com_3:Q_sqrt3;
end
6'b000111:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-23){1'b0}},Qcnt_four_7[30:3]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-24){1'b0}},Qcnt_four_7[30:2]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=2'b00;
Q_sqrt2={{(C_MANT_FP64-25){1'b0}},Qcnt_four_7[30:1]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
Sqrt_DI[3]=2'b00;
Q_sqrt3={{(C_MANT_FP64-26){1'b0}},Qcnt_four_7[30:0]};
Sqrt_Q3=Sqrt_quotinent_S[1]?Q_sqrt_com_3:Q_sqrt3;
end
6'b001000:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-27){1'b0}},Qcnt_four_8[34:3]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-28){1'b0}},Qcnt_four_8[34:2]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=2'b00;
Q_sqrt2={{(C_MANT_FP64-29){1'b0}},Qcnt_four_8[34:1]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
Sqrt_DI[3]=2'b00;
Q_sqrt3={{(C_MANT_FP64-30){1'b0}},Qcnt_four_8[34:0]};
Sqrt_Q3=Sqrt_quotinent_S[1]?Q_sqrt_com_3:Q_sqrt3;
end
6'b001001:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-31){1'b0}},Qcnt_four_9[38:3]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-32){1'b0}},Qcnt_four_9[38:2]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=2'b00;
Q_sqrt2={{(C_MANT_FP64-33){1'b0}},Qcnt_four_9[38:1]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
Sqrt_DI[3]=2'b00;
Q_sqrt3={{(C_MANT_FP64-34){1'b0}},Qcnt_four_9[38:0]};
Sqrt_Q3=Sqrt_quotinent_S[1]?Q_sqrt_com_3:Q_sqrt3;
end
6'b001010:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-35){1'b0}},Qcnt_four_10[42:3]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-36){1'b0}},Qcnt_four_10[42:2]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=2'b00;
Q_sqrt2={{(C_MANT_FP64-37){1'b0}},Qcnt_four_10[42:1]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
Sqrt_DI[3]=2'b00;
Q_sqrt3={{(C_MANT_FP64-38){1'b0}},Qcnt_four_10[42:0]};
Sqrt_Q3=Sqrt_quotinent_S[1]?Q_sqrt_com_3:Q_sqrt3;
end
6'b001011:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-39){1'b0}},Qcnt_four_11[46:3]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-40){1'b0}},Qcnt_four_11[46:2]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=2'b00;
Q_sqrt2={{(C_MANT_FP64-41){1'b0}},Qcnt_four_11[46:1]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
Sqrt_DI[3]=2'b00;
Q_sqrt3={{(C_MANT_FP64-42){1'b0}},Qcnt_four_11[46:0]};
Sqrt_Q3=Sqrt_quotinent_S[1]?Q_sqrt_com_3:Q_sqrt3;
end
6'b001100:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-43){1'b0}},Qcnt_four_12[50:3]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-44){1'b0}},Qcnt_four_12[50:2]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=2'b00;
Q_sqrt2={{(C_MANT_FP64-45){1'b0}},Qcnt_four_12[50:1]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
Sqrt_DI[3]=2'b00;
Q_sqrt3={{(C_MANT_FP64-46){1'b0}},Qcnt_four_12[50:0]};
Sqrt_Q3=Sqrt_quotinent_S[1]?Q_sqrt_com_3:Q_sqrt3;
end
6'b001101:
begin
Sqrt_DI[0]=2'b00;
Q_sqrt0={{(C_MANT_FP64-47){1'b0}},Qcnt_four_13[54:3]};
Sqrt_Q0=Quotient_DP[0]?Q_sqrt_com_0:Q_sqrt0;
Sqrt_DI[1]=2'b00;
Q_sqrt1={{(C_MANT_FP64-48){1'b0}},Qcnt_four_13[54:2]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=2'b00;
Q_sqrt2={{(C_MANT_FP64-49){1'b0}},Qcnt_four_13[54:1]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
Sqrt_DI[3]=2'b00;
Q_sqrt3={{(C_MANT_FP64-50){1'b0}},Qcnt_four_13[54:0]};
Sqrt_Q3=Sqrt_quotinent_S[1]?Q_sqrt_com_3:Q_sqrt3;
end
default:
begin
Sqrt_DI[0]=Mant_D_sqrt_Norm[C_MANT_FP64+1:C_MANT_FP64];
Q_sqrt0={{(C_MANT_FP64+5){1'b0}},Qcnt_four_0[3]};
Sqrt_Q0=Q_sqrt_com_0;
Sqrt_DI[1]=Mant_D_sqrt_Norm[C_MANT_FP64-1:C_MANT_FP64-2];
Q_sqrt1={{(C_MANT_FP64+4){1'b0}},Qcnt_four_0[3:2]};
Sqrt_Q1=Sqrt_quotinent_S[3]?Q_sqrt_com_1:Q_sqrt1;
Sqrt_DI[2]=Mant_D_sqrt_Norm[C_MANT_FP64-3:C_MANT_FP64-4];
Q_sqrt2={{(C_MANT_FP64+3){1'b0}},Qcnt_four_0[3:1]};
Sqrt_Q2=Sqrt_quotinent_S[2]?Q_sqrt_com_2:Q_sqrt2;
Sqrt_DI[3]=Mant_D_sqrt_Norm[C_MANT_FP64-5:C_MANT_FP64-6];
Q_sqrt3={{(C_MANT_FP64+2){1'b0}},Qcnt_four_0[3:0]};
Sqrt_Q3=Sqrt_quotinent_S[1]?Q_sqrt_com_3:Q_sqrt3;
end
endcase
end
endcase
/////////////////////////////////////////////////////////////////////////////
// Operands for square root when Iteration_unit_num_S = 2'b11, end //
/////////////////////////////////////////////////////////////////////////////
end
assign Sqrt_R0= ((Sqrt_start_dly_S)?'0:{Partial_remainder_DP[C_MANT_FP64+5:0]});
assign Sqrt_R1= {Iteration_cell_sum_AMASK_D[0][C_MANT_FP64+5],Iteration_cell_sum_AMASK_D[0][C_MANT_FP64+2:0],Sqrt_DO[0]} ;
assign Sqrt_R2= {Iteration_cell_sum_AMASK_D[1][C_MANT_FP64+5],Iteration_cell_sum_AMASK_D[1][C_MANT_FP64+2:0],Sqrt_DO[1]};
assign Sqrt_R3= {Iteration_cell_sum_AMASK_D[2][C_MANT_FP64+5],Iteration_cell_sum_AMASK_D[2][C_MANT_FP64+2:0],Sqrt_DO[2]};
assign Sqrt_R4= {Iteration_cell_sum_AMASK_D[3][C_MANT_FP64+5],Iteration_cell_sum_AMASK_D[3][C_MANT_FP64+2:0],Sqrt_DO[3]};
logic [C_MANT_FP64+5:0] Denominator_se_format_DB; //
assign Denominator_se_format_DB={Denominator_se_DB[C_MANT_FP64+1:C_MANT_FP64-C_MANT_FP16ALT],{FP16ALT_SO?FP16ALT_SO:Denominator_se_DB[C_MANT_FP64-C_MANT_FP16ALT-1]},
Denominator_se_DB[C_MANT_FP64-C_MANT_FP16ALT-2:C_MANT_FP64-C_MANT_FP16],{FP16_SO?FP16_SO:Denominator_se_DB[C_MANT_FP64-C_MANT_FP16-1]},
Denominator_se_DB[C_MANT_FP64-C_MANT_FP16-2:C_MANT_FP64-C_MANT_FP32],{FP32_SO?FP32_SO:Denominator_se_DB[C_MANT_FP64-C_MANT_FP32-1]},
Denominator_se_DB[C_MANT_FP64-C_MANT_FP32-2:C_MANT_FP64-C_MANT_FP64],FP64_SO,3'b0} ;
// for iteration cell_U0
logic [C_MANT_FP64+5:0] First_iteration_cell_div_a_D,First_iteration_cell_div_b_D;
logic Sel_b_for_first_S;
assign First_iteration_cell_div_a_D=(Div_start_dly_S)?{Numerator_se_D[C_MANT_FP64+1:C_MANT_FP64-C_MANT_FP16ALT],{FP16ALT_SO?FP16ALT_SO:Numerator_se_D[C_MANT_FP64-C_MANT_FP16ALT-1]},
Numerator_se_D[C_MANT_FP64-C_MANT_FP16ALT-2:C_MANT_FP64-C_MANT_FP16],{FP16_SO?FP16_SO:Numerator_se_D[C_MANT_FP64-C_MANT_FP16-1]},
Numerator_se_D[C_MANT_FP64-C_MANT_FP16-2:C_MANT_FP64-C_MANT_FP32],{FP32_SO?FP32_SO:Numerator_se_D[C_MANT_FP64-C_MANT_FP32-1]},
Numerator_se_D[C_MANT_FP64-C_MANT_FP32-2:C_MANT_FP64-C_MANT_FP64],FP64_SO,3'b0}
:{Partial_remainder_DP[C_MANT_FP64+4:C_MANT_FP64-C_MANT_FP16ALT+3],{FP16ALT_SO?Quotient_DP[0]:Partial_remainder_DP[C_MANT_FP64-C_MANT_FP16ALT+2]},
Partial_remainder_DP[C_MANT_FP64-C_MANT_FP16ALT+1:C_MANT_FP64-C_MANT_FP16+3],{FP16_SO?Quotient_DP[0]:Partial_remainder_DP[C_MANT_FP64-C_MANT_FP16+2]},
Partial_remainder_DP[C_MANT_FP64-C_MANT_FP16+1:C_MANT_FP64-C_MANT_FP32+3],{FP32_SO?Quotient_DP[0]:Partial_remainder_DP[C_MANT_FP64-C_MANT_FP32+2]},
Partial_remainder_DP[C_MANT_FP64-C_MANT_FP32+1:C_MANT_FP64-C_MANT_FP64+3],FP64_SO&&Quotient_DP[0],3'b0};
assign Sel_b_for_first_S=(Div_start_dly_S)?1:Quotient_DP[0];
assign First_iteration_cell_div_b_D=Sel_b_for_first_S?Denominator_se_format_DB:{Denominator_se_D,4'b0};
assign Iteration_cell_a_BMASK_D[0]=Sqrt_enable_SO?Sqrt_R0:{First_iteration_cell_div_a_D};
assign Iteration_cell_b_BMASK_D[0]=Sqrt_enable_SO?Sqrt_Q0:{First_iteration_cell_div_b_D};
// for iteration cell_U1
logic [C_MANT_FP64+5:0] Sec_iteration_cell_div_a_D,Sec_iteration_cell_div_b_D;
logic Sel_b_for_sec_S;
generate
if(|Iteration_unit_num_S)
begin
assign Sel_b_for_sec_S=~Iteration_cell_sum_AMASK_D[0][C_MANT_FP64+5];
assign Sec_iteration_cell_div_a_D={Iteration_cell_sum_AMASK_D[0][C_MANT_FP64+4:C_MANT_FP64-C_MANT_FP16ALT+3],{FP16ALT_SO?Sel_b_for_sec_S:Iteration_cell_sum_AMASK_D[0][C_MANT_FP64-C_MANT_FP16ALT+2]},
Iteration_cell_sum_AMASK_D[0][C_MANT_FP64-C_MANT_FP16ALT+1:C_MANT_FP64-C_MANT_FP16+3],{FP16_SO?Sel_b_for_sec_S:Iteration_cell_sum_AMASK_D[0][C_MANT_FP64-C_MANT_FP16+2]},
Iteration_cell_sum_AMASK_D[0][C_MANT_FP64-C_MANT_FP16+1:C_MANT_FP64-C_MANT_FP32+3],{FP32_SO?Sel_b_for_sec_S:Iteration_cell_sum_AMASK_D[0][C_MANT_FP64-C_MANT_FP32+2]},
Iteration_cell_sum_AMASK_D[0][C_MANT_FP64-C_MANT_FP32+1:C_MANT_FP64-C_MANT_FP64+3],FP64_SO&&Sel_b_for_sec_S,3'b0};
assign Sec_iteration_cell_div_b_D=Sel_b_for_sec_S?Denominator_se_format_DB:{Denominator_se_D,4'b0};
assign Iteration_cell_a_BMASK_D[1]=Sqrt_enable_SO?Sqrt_R1:{Sec_iteration_cell_div_a_D};
assign Iteration_cell_b_BMASK_D[1]=Sqrt_enable_SO?Sqrt_Q1:{Sec_iteration_cell_div_b_D};
end
endgenerate
// for iteration cell_U2
logic [C_MANT_FP64+5:0] Thi_iteration_cell_div_a_D,Thi_iteration_cell_div_b_D;
logic Sel_b_for_thi_S;
generate
if((Iteration_unit_num_S==2'b10) | (Iteration_unit_num_S==2'b11))
begin
assign Sel_b_for_thi_S=~Iteration_cell_sum_AMASK_D[1][C_MANT_FP64+5];
assign Thi_iteration_cell_div_a_D={Iteration_cell_sum_AMASK_D[1][C_MANT_FP64+4:C_MANT_FP64-C_MANT_FP16ALT+3],{FP16ALT_SO?Sel_b_for_thi_S:Iteration_cell_sum_AMASK_D[1][C_MANT_FP64-C_MANT_FP16ALT+2]},
Iteration_cell_sum_AMASK_D[1][C_MANT_FP64-C_MANT_FP16ALT+1:C_MANT_FP64-C_MANT_FP16+3],{FP16_SO?Sel_b_for_thi_S:Iteration_cell_sum_AMASK_D[1][C_MANT_FP64-C_MANT_FP16+2]},
Iteration_cell_sum_AMASK_D[1][C_MANT_FP64-C_MANT_FP16+1:C_MANT_FP64-C_MANT_FP32+3],{FP32_SO?Sel_b_for_thi_S:Iteration_cell_sum_AMASK_D[1][C_MANT_FP64-C_MANT_FP32+2]},
Iteration_cell_sum_AMASK_D[1][C_MANT_FP64-C_MANT_FP32+1:C_MANT_FP64-C_MANT_FP64+3],FP64_SO&&Sel_b_for_thi_S,3'b0};
assign Thi_iteration_cell_div_b_D=Sel_b_for_thi_S?Denominator_se_format_DB:{Denominator_se_D,4'b0};
assign Iteration_cell_a_BMASK_D[2]=Sqrt_enable_SO?Sqrt_R2:{Thi_iteration_cell_div_a_D};
assign Iteration_cell_b_BMASK_D[2]=Sqrt_enable_SO?Sqrt_Q2:{Thi_iteration_cell_div_b_D};
end
endgenerate
// for iteration cell_U3
logic [C_MANT_FP64+5:0] Fou_iteration_cell_div_a_D,Fou_iteration_cell_div_b_D;
logic Sel_b_for_fou_S;
generate
if(Iteration_unit_num_S==2'b11)
begin
assign Sel_b_for_fou_S=~Iteration_cell_sum_AMASK_D[2][C_MANT_FP64+5];
assign Fou_iteration_cell_div_a_D={Iteration_cell_sum_AMASK_D[2][C_MANT_FP64+4:C_MANT_FP64-C_MANT_FP16ALT+3],{FP16ALT_SO?Sel_b_for_fou_S:Iteration_cell_sum_AMASK_D[2][C_MANT_FP64-C_MANT_FP16ALT+2]},
Iteration_cell_sum_AMASK_D[2][C_MANT_FP64-C_MANT_FP16ALT+1:C_MANT_FP64-C_MANT_FP16+3],{FP16_SO?Sel_b_for_fou_S:Iteration_cell_sum_AMASK_D[2][C_MANT_FP64-C_MANT_FP16+2]},
Iteration_cell_sum_AMASK_D[2][C_MANT_FP64-C_MANT_FP16+1:C_MANT_FP64-C_MANT_FP32+3],{FP32_SO?Sel_b_for_fou_S:Iteration_cell_sum_AMASK_D[2][C_MANT_FP64-C_MANT_FP32+2]},
Iteration_cell_sum_AMASK_D[2][C_MANT_FP64-C_MANT_FP32+1:C_MANT_FP64-C_MANT_FP64+3],FP64_SO&&Sel_b_for_fou_S,3'b0};
assign Fou_iteration_cell_div_b_D=Sel_b_for_fou_S?Denominator_se_format_DB:{Denominator_se_D,4'b0};
assign Iteration_cell_a_BMASK_D[3]=Sqrt_enable_SO?Sqrt_R3:{Fou_iteration_cell_div_a_D};
assign Iteration_cell_b_BMASK_D[3]=Sqrt_enable_SO?Sqrt_Q3:{Fou_iteration_cell_div_b_D};
end
endgenerate
/////////////////////////////////////////////////////////////////////////////
// Masking Contrl //
/////////////////////////////////////////////////////////////////////////////
logic [C_MANT_FP64+1+4:0] Mask_bits_ctl_S; //For extension
assign Mask_bits_ctl_S =58'h3ff_ffff_ffff_ffff; //It is not needed. The corresponding process is handled the above codes
/////////////////////////////////////////////////////////////////////////////
// Iteration Instances with masking control //
/////////////////////////////////////////////////////////////////////////////
logic Div_enable_SI [3:0];
logic Div_start_dly_SI [3:0];
logic Sqrt_enable_SI [3:0];
generate
genvar i,j;
for (i=0; i <= Iteration_unit_num_S ; i++)
begin
for (j = 0; j <= C_MANT_FP64+5; j++) begin
assign Iteration_cell_a_D[i][j] = Mask_bits_ctl_S[j] && Iteration_cell_a_BMASK_D[i][j];
assign Iteration_cell_b_D[i][j] = Mask_bits_ctl_S[j] && Iteration_cell_b_BMASK_D[i][j];
assign Iteration_cell_sum_AMASK_D[i][j] = Mask_bits_ctl_S[j] && Iteration_cell_sum_D[i][j];
end
assign Div_enable_SI[i] = Div_enable_SO;
assign Div_start_dly_SI[i] = Div_start_dly_S;
assign Sqrt_enable_SI[i] = Sqrt_enable_SO;
iteration_div_sqrt_mvp #(C_MANT_FP64+6) iteration_div_sqrt
(
.A_DI (Iteration_cell_a_D[i] ),
.B_DI (Iteration_cell_b_D[i] ),
.Div_enable_SI (Div_enable_SI[i] ),
.Div_start_dly_SI (Div_start_dly_SI[i] ),
.Sqrt_enable_SI (Sqrt_enable_SI[i] ),
.D_DI (Sqrt_DI[i] ),
.D_DO (Sqrt_DO[i] ),
.Sum_DO (Iteration_cell_sum_D[i] ),
.Carry_out_DO (Iteration_cell_carry_D[i] )
);
end
endgenerate
always_comb
begin
case (Iteration_unit_num_S)
2'b00:
begin
if(Fsm_enable_S)
Partial_remainder_DN = Sqrt_enable_SO?Sqrt_R1:Iteration_cell_sum_AMASK_D[0];
else
Partial_remainder_DN = Partial_remainder_DP;
end
2'b01:
begin
if(Fsm_enable_S)
Partial_remainder_DN = Sqrt_enable_SO?Sqrt_R2:Iteration_cell_sum_AMASK_D[1];
else
Partial_remainder_DN = Partial_remainder_DP;
end
2'b10:
begin
if(Fsm_enable_S)
Partial_remainder_DN = Sqrt_enable_SO?Sqrt_R3:Iteration_cell_sum_AMASK_D[2];
else
Partial_remainder_DN = Partial_remainder_DP;
end
2'b11:
begin
if(Fsm_enable_S)
Partial_remainder_DN = Sqrt_enable_SO?Sqrt_R4:Iteration_cell_sum_AMASK_D[3];
else
Partial_remainder_DN = Partial_remainder_DP;
end
endcase
end
always_ff @(posedge Clk_CI, negedge Rst_RBI) // partial_remainder
begin
if(~Rst_RBI)
begin
Partial_remainder_DP <= '0;
end
else
begin
Partial_remainder_DP <= Partial_remainder_DN;
end
end
logic [C_MANT_FP64+4:0] Quotient_DN;
always_comb // Can choosen the different carry-outs based on different operations
begin
case (Iteration_unit_num_S)
2'b00:
begin
if(Fsm_enable_S)
Quotient_DN= Sqrt_enable_SO ? {Quotient_DP[C_MANT_FP64+3:0],Sqrt_quotinent_S[3]} :{Quotient_DP[C_MANT_FP64+3:0],Iteration_cell_carry_D[0]};
else
Quotient_DN= Quotient_DP;
end
2'b01:
begin
if(Fsm_enable_S)
Quotient_DN= Sqrt_enable_SO ? {Quotient_DP[C_MANT_FP64+2:0],Sqrt_quotinent_S[3:2]} :{Quotient_DP[C_MANT_FP64+2:0],Iteration_cell_carry_D[0],Iteration_cell_carry_D[1]};
else
Quotient_DN= Quotient_DP;
end
2'b10:
begin
if(Fsm_enable_S)
Quotient_DN= Sqrt_enable_SO ? {Quotient_DP[C_MANT_FP64+1:0],Sqrt_quotinent_S[3:1]} : {Quotient_DP[C_MANT_FP64+1:0],Iteration_cell_carry_D[0],Iteration_cell_carry_D[1],Iteration_cell_carry_D[2]};
else
Quotient_DN= Quotient_DP;
end
2'b11:
begin
if(Fsm_enable_S)
Quotient_DN= Sqrt_enable_SO ? {Quotient_DP[C_MANT_FP64:0],Sqrt_quotinent_S } : {Quotient_DP[C_MANT_FP64:0],Iteration_cell_carry_D[0],Iteration_cell_carry_D[1],Iteration_cell_carry_D[2],Iteration_cell_carry_D[3]};
else
Quotient_DN= Quotient_DP;
end
endcase
end
always_ff @(posedge Clk_CI, negedge Rst_RBI) // Quotient
begin
if(~Rst_RBI)
begin
Quotient_DP <= '0;
end
else
Quotient_DP <= Quotient_DN;
end
/////////////////////////////////////////////////////////////////////////////
// Precision Control for outputs //
/////////////////////////////////////////////////////////////////////////////
//////////////////////one iteration unit, start///////////////////////////////////////
generate
if(Iteration_unit_num_S==2'b00)
begin
always_comb
begin
case (Format_sel_S)
2'b00:
begin
case (Precision_ctl_S)
6'h00:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32+4:0],{(C_MANT_FP64-C_MANT_FP32){1'b0}}}; //+4
end
6'h17:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32:0],{(C_MANT_FP64-C_MANT_FP32+4){1'b0}}}; //Precision_ctl_S+1
end
6'h16:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-1:0],{(C_MANT_FP64-C_MANT_FP32+4+1){1'b0}}}; //Precision_ctl_S+1
end
6'h15:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-2:0],{(C_MANT_FP64-C_MANT_FP32+4+2){1'b0}}}; //Precision_ctl_S+1
end
6'h14:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-3:0],{(C_MANT_FP64-C_MANT_FP32+4+3){1'b0}}}; //Precision_ctl_S+1
end
6'h13:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-4:0],{(C_MANT_FP64-C_MANT_FP32+4+4){1'b0}}}; //Precision_ctl_S+1
end
6'h12:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-5:0],{(C_MANT_FP64-C_MANT_FP32+4+5){1'b0}}}; //Precision_ctl_S+1
end
6'h11:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-6:0],{(C_MANT_FP64-C_MANT_FP32+4+6){1'b0}}}; //Precision_ctl_S+1
end
6'h10:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-7:0],{(C_MANT_FP64-C_MANT_FP32+4+7){1'b0}}}; //Precision_ctl_S+1
end
6'h0f:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-8:0],{(C_MANT_FP64-C_MANT_FP32+4+8){1'b0}}}; //Precision_ctl_S+1
end
6'h0e:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-9:0],{(C_MANT_FP64-C_MANT_FP32+4+9){1'b0}}}; //Precision_ctl_S+1
end
6'h0d:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-10:0],{(C_MANT_FP64-C_MANT_FP32+4+10){1'b0}}}; //Precision_ctl_S+1
end
6'h0c:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-11:0],{(C_MANT_FP64-C_MANT_FP32+4+11){1'b0}}}; //Precision_ctl_S+1
end
6'h0b:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-12:0],{(C_MANT_FP64-C_MANT_FP32+4+12){1'b0}}}; //Precision_ctl_S+1
end
6'h0a:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-13:0],{(C_MANT_FP64-C_MANT_FP32+4+13){1'b0}}}; //Precision_ctl_S+1
end
6'h09:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-14:0],{(C_MANT_FP64-C_MANT_FP32+4+14){1'b0}}}; //Precision_ctl_S+1
end
6'h08:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-15:0],{(C_MANT_FP64-C_MANT_FP32+4+15){1'b0}}}; //Precision_ctl_S+1
end
6'h07:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-16:0],{(C_MANT_FP64-C_MANT_FP32+4+16){1'b0}}}; //Precision_ctl_S+1
end
default :
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32+4:0],{(C_MANT_FP64-C_MANT_FP32){1'b0}}}; //+4
end
endcase
end
2'b01:
begin
case (Precision_ctl_S)
6'h00:
begin
Mant_result_prenorm_DO = Quotient_DP[C_MANT_FP64+4:0]; //+4
end
6'h34:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64:0],{(4){1'b0}}}; //Precision_ctl_S+1
end
6'h33:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-1:0],{(4+1){1'b0}}}; //Precision_ctl_S+1
end
6'h32:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-2:0],{(4+2){1'b0}}}; //Precision_ctl_S+1
end
6'h31:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-3:0],{(4+3){1'b0}}}; //Precision_ctl_S+1
end
6'h30:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-4:0],{(4+4){1'b0}}}; //Precision_ctl_S+1
end
6'h2f:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-5:0],{(4+5){1'b0}}}; //Precision_ctl_S+1
end
6'h2e:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-6:0],{(4+6){1'b0}}}; //Precision_ctl_S+1
end
6'h2d:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-7:0],{(4+7){1'b0}}}; //Precision_ctl_S+1
end
6'h2c:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-8:0],{(4+8){1'b0}}}; //Precision_ctl_S+1
end
6'h2b:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-9:0],{(4+9){1'b0}}}; //Precision_ctl_S+1
end
6'h2a:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-10:0],{(4+10){1'b0}}}; //Precision_ctl_S+1
end
6'h29:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-11:0],{(4+11){1'b0}}}; //Precision_ctl_S+1
end
6'h28:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-12:0],{(4+12){1'b0}}}; //Precision_ctl_S+1
end
6'h27:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-13:0],{(4+13){1'b0}}}; //Precision_ctl_S+1
end
6'h26:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-14:0],{(4+14){1'b0}}}; //Precision_ctl_S+1
end
6'h25:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-15:0],{(4+15){1'b0}}}; //Precision_ctl_S+1
end
6'h24:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-16:0],{(4+16){1'b0}}}; //Precision_ctl_S+1
end
6'h23:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-17:0],{(4+17){1'b0}}}; //Precision_ctl_S+1
end
6'h22:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-18:0],{(4+18){1'b0}}}; //Precision_ctl_S+1
end
6'h21:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-19:0],{(4+19){1'b0}}}; //Precision_ctl_S+1
end
6'h20:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-20:0],{(4+20){1'b0}}}; //Precision_ctl_S+1
end
6'h1f:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-21:0],{(4+21){1'b0}}}; //Precision_ctl_S+1
end
6'h1e:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-22:0],{(4+22){1'b0}}}; //Precision_ctl_S+1
end
6'h1d:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-23:0],{(4+23){1'b0}}}; //Precision_ctl_S+1
end
6'h1c:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-24:0],{(4+24){1'b0}}}; //Precision_ctl_S+1
end
6'h1b:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-25:0],{(4+25){1'b0}}}; //Precision_ctl_S+1
end
6'h1a:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-26:0],{(4+26){1'b0}}}; //Precision_ctl_S+1
end
6'h19:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-27:0],{(4+27){1'b0}}}; //Precision_ctl_S+1
end
6'h18:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-28:0],{(4+28){1'b0}}}; //Precision_ctl_S+1
end
6'h17:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-29:0],{(4+29){1'b0}}}; //Precision_ctl_S+1
end
6'h16:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-30:0],{(4+30){1'b0}}}; //Precision_ctl_S+1
end
6'h15:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-31:0],{(4+31){1'b0}}}; //Precision_ctl_S+1
end
6'h14:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-32:0],{(4+32){1'b0}}}; //Precision_ctl_S+1
end
6'h13:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-33:0],{(4+33){1'b0}}}; //Precision_ctl_S+1
end
6'h12:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-34:0],{(4+34){1'b0}}}; //Precision_ctl_S+1
end
6'h11:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-35:0],{(4+35){1'b0}}}; //Precision_ctl_S+1
end
6'h10:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-36:0],{(4+36){1'b0}}}; //Precision_ctl_S+1
end
6'h0f:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-37:0],{(4+37){1'b0}}}; //Precision_ctl_S+1
end
6'h0e:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-38:0],{(4+38){1'b0}}}; //Precision_ctl_S+1
end
6'h0d:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-39:0],{(4+39){1'b0}}}; //Precision_ctl_S+1
end
6'h0c:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-40:0],{(4+40){1'b0}}}; //Precision_ctl_S+1
end
6'h0b:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-41:0],{(4+41){1'b0}}}; //Precision_ctl_S+1
end
6'h0a:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-42:0],{(4+42){1'b0}}}; //Precision_ctl_S+1
end
6'h09:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-43:0],{(4+43){1'b0}}}; //Precision_ctl_S+1
end
6'h08:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-44:0],{(4+44){1'b0}}}; //Precision_ctl_S+1
end
6'h07:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-45:0],{(4+45){1'b0}}}; //Precision_ctl_S+1
end
default:
begin
Mant_result_prenorm_DO = Quotient_DP[C_MANT_FP64+4:0]; //+4
end
endcase
end
2'b10:
begin
case (Precision_ctl_S)
6'b00:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16+4:0],{(C_MANT_FP64-C_MANT_FP16){1'b0}}}; //+4
end
6'h0a:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16:0],{(C_MANT_FP64-C_MANT_FP16+4){1'b0}}}; //Precision_ctl_S+1
end
6'h09:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16-1:0],{(C_MANT_FP64-C_MANT_FP16+4+1){1'b0}}}; //Precision_ctl_S+1
end
6'h08:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16-2:0],{(C_MANT_FP64-C_MANT_FP16+4+2){1'b0}}}; //Precision_ctl_S+1
end
6'h07:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16-3:0],{(C_MANT_FP64-C_MANT_FP16+4+3){1'b0}}}; //Precision_ctl_S+1
end
default :
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16+4:0],{(C_MANT_FP64-C_MANT_FP16){1'b0}}}; //+4
end
endcase
end
2'b11:
begin
case (Precision_ctl_S)
6'b00:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16ALT+4:0],{(C_MANT_FP64-C_MANT_FP16ALT){1'b0}}}; //+4
end
6'h07:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16ALT:0],{(C_MANT_FP64-C_MANT_FP16ALT+4){1'b0}}}; //Precision_ctl_S+1
end
default :
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16ALT+4:0],{(C_MANT_FP64-C_MANT_FP16ALT){1'b0}}}; //+4
end
endcase
end
endcase
end
end
endgenerate
//////////////////////one iteration unit, end//////////////////////////////////////////
//////////////////////two iteration units, start///////////////////////////////////////
generate
if(Iteration_unit_num_S==2'b01)
begin
always_comb
begin
case (Format_sel_S)
2'b00:
begin
case (Precision_ctl_S)
6'h00:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32+4:0],{(C_MANT_FP64-C_MANT_FP32){1'b0}}}; //+4
end
6'h17,6'h16:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32:0],{(C_MANT_FP64-C_MANT_FP32+4){1'b0}}}; //Precision_ctl_S+1
end
6'h15,6'h14:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-2:0],{(C_MANT_FP64-C_MANT_FP32+4+2){1'b0}}}; //Precision_ctl_S+1
end
6'h13,6'h12:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-4:0],{(C_MANT_FP64-C_MANT_FP32+4+4){1'b0}}}; //Precision_ctl_S+1
end
6'h11,6'h10:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-6:0],{(C_MANT_FP64-C_MANT_FP32+4+6){1'b0}}}; //Precision_ctl_S+1
end
6'h0f,6'h0e:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-8:0],{(C_MANT_FP64-C_MANT_FP32+4+8){1'b0}}}; //Precision_ctl_S+1
end
6'h0d,6'h0c:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-10:0],{(C_MANT_FP64-C_MANT_FP32+4+10){1'b0}}}; //Precision_ctl_S+1
end
6'h0b,6'h0a:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-12:0],{(C_MANT_FP64-C_MANT_FP32+4+12){1'b0}}}; //Precision_ctl_S+1
end
6'h09,6'h08:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-14:0],{(C_MANT_FP64-C_MANT_FP32+4+14){1'b0}}}; //Precision_ctl_S+1
end
6'h07,6'h06:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-16:0],{(C_MANT_FP64-C_MANT_FP32+4+16){1'b0}}}; //Precision_ctl_S+1
end
default:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32+4:0],{(C_MANT_FP64-C_MANT_FP32){1'b0}}}; //+4
end
endcase
end
2'b01:
begin
case (Precision_ctl_S)
6'h00:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64+3:0],1'b0}; //+3
end
6'h34:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64+1:1],{(4){1'b0}} }; //Precision_ctl_S+1
end
6'h33,6'h32:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-1:0],{(4+1){1'b0}} }; //Precision_ctl_S+1
end
6'h31,6'h30:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-3:0],{(4+3){1'b0}} }; //Precision_ctl_S+1
end
6'h2f,6'h2e:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-5:0],{(4+5){1'b0}} }; //Precision_ctl_S+1
end
6'h2d,6'h2c:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-7:0],{(4+7){1'b0}} }; //Precision_ctl_S+1
end
6'h2b,6'h2a:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-9:0],{(4+9){1'b0}} }; //Precision_ctl_S+1
end
6'h29,6'h28:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-11:0],{(4+11){1'b0}} }; //Precision_ctl_S+1
end
6'h27,6'h26:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-13:0],{(4+13){1'b0}} }; //Precision_ctl_S+1
end
6'h25,6'h24:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-15:0],{(4+15){1'b0}} }; //Precision_ctl_S+1
end
6'h23,6'h22:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-17:0],{(4+17){1'b0}} }; //Precision_ctl_S+1
end
6'h21,6'h20:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-19:0],{(4+19){1'b0}} }; //Precision_ctl_S+1
end
6'h1f,6'h1e:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-21:0],{(4+21){1'b0}} }; //Precision_ctl_S+1
end
6'h1d,6'h1c:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-23:0],{(4+23){1'b0}} }; //Precision_ctl_S+1
end
6'h1b,6'h1a:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-25:0],{(4+25){1'b0}} }; //Precision_ctl_S+1
end
6'h19,6'h18:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-27:0],{(4+27){1'b0}} }; //Precision_ctl_S+1
end
6'h17,6'h16:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-29:0],{(4+29){1'b0}} }; //Precision_ctl_S+1
end
6'h15,6'h14:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-31:0],{(4+31){1'b0}} }; //Precision_ctl_S+1
end
6'h13,6'h12:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-33:0],{(4+33){1'b0}} }; //Precision_ctl_S+1
end
6'h11,6'h10:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-35:0],{(4+35){1'b0}} }; //Precision_ctl_S+1
end
6'h0f,6'h0e:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-37:0],{(4+37){1'b0}} }; //Precision_ctl_S+1
end
6'h0d,6'h0c:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-39:0],{(4+39){1'b0}} }; //Precision_ctl_S+1
end
6'h0b,6'h0a:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-41:0],{(4+41){1'b0}} }; //Precision_ctl_S+1
end
6'h09,6'h08:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-43:0],{(4+43){1'b0}} }; //Precision_ctl_S+1
end
6'h07:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-45:0],{(4+45){1'b0}} }; //Precision_ctl_S+1
end
default:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64+3:0],1'b0}; //+3
end
endcase
end
2'b10:
begin
case (Precision_ctl_S)
6'b00:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16+3:0],{(C_MANT_FP64-C_MANT_FP16+1){1'b0}} }; //+3
end
6'h0a:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16+1:1],{(C_MANT_FP64-C_MANT_FP16+4){1'b0}} }; //Precision_ctl_S+1
end
6'h09,6'h08:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16-1:0],{(C_MANT_FP64-C_MANT_FP16+4+1){1'b0}} }; //Precision_ctl_S+1
end
6'h07:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16-3:0],{(C_MANT_FP64-C_MANT_FP16+4+3){1'b0}} }; //Precision_ctl_S+1
end
default :
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16+4:0],{(C_MANT_FP64-C_MANT_FP16){1'b0}} }; //+4
end
endcase
end
2'b11:
begin
case (Precision_ctl_S)
6'b00:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16ALT+4:0],{(C_MANT_FP64-C_MANT_FP16ALT){1'b0}} }; //+4
end
6'h07:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16ALT:0],{(C_MANT_FP64-C_MANT_FP16ALT+4){1'b0}} }; //Precision_ctl_S+1
end
default :
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16ALT+4:0],{(C_MANT_FP64-C_MANT_FP16ALT){1'b0}} }; //+4
end
endcase
end
endcase
end
end
endgenerate
//////////////////////two iteration units, end//////////////////////////////////////////
//////////////////////three iteration units, start///////////////////////////////////////
generate
if(Iteration_unit_num_S==2'b10)
begin
always_comb
begin
case (Format_sel_S)
2'b00:
begin
case (Precision_ctl_S)
6'h00:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32+3:0],{(C_MANT_FP64-C_MANT_FP32+1){1'b0}}}; //+3
end
6'h17,6'h16,6'h15:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32:0],{(C_MANT_FP64-C_MANT_FP32+4){1'b0}}}; //Precision_ctl_S+1
end
6'h14,6'h13,6'h12:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-3:0],{(C_MANT_FP64-C_MANT_FP32+4+3){1'b0}}}; //Precision_ctl_S+1
end
6'h11,6'h10,6'h0f:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-6:0],{(C_MANT_FP64-C_MANT_FP32+4+6){1'b0}}}; //Precision_ctl_S+1
end
6'h0e,6'h0d,6'h0c:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-9:0],{(C_MANT_FP64-C_MANT_FP32+4+9){1'b0}}}; //Precision_ctl_S+1
end
6'h0b,6'h0a,6'h09:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-12:0],{(C_MANT_FP64-C_MANT_FP32+4+12){1'b0}}}; //Precision_ctl_S+1
end
6'h08,6'h07,6'h06:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-15:0],{(C_MANT_FP64-C_MANT_FP32+4+15){1'b0}}}; //Precision_ctl_S+1
end
default:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32+3:0],{(C_MANT_FP64-C_MANT_FP32+1){1'b0}}}; //+3
end
endcase
end
2'b01:
begin
case (Precision_ctl_S)
6'h00:
begin
Mant_result_prenorm_DO = Quotient_DP[C_MANT_FP64+4:0]; //+4
end
6'h34,6'h33:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64+1:1],{(4){1'b0}} }; //Precision_ctl_S+1
end
6'h32,6'h31,6'h30:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-2:0],{(4+2){1'b0}} }; //Precision_ctl_S+1
end
6'h2f,6'h2e,6'h2d:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-5:0],{(4+5){1'b0}} }; //Precision_ctl_S+1
end
6'h2c,6'h2b,6'h2a:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-8:0],{(4+8){1'b0}} }; //Precision_ctl_S+1
end
6'h29,6'h28,6'h27:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-11:0],{(4+11){1'b0}} }; //Precision_ctl_S+1
end
6'h26,6'h25,6'h24:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-14:0],{(4+14){1'b0}} }; //Precision_ctl_S+1
end
6'h23,6'h22,6'h21:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-17:0],{(4+17){1'b0}} }; //Precision_ctl_S+1
end
6'h20,6'h1f,6'h1e:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-20:0],{(4+20){1'b0}} }; //Precision_ctl_S+1
end
6'h1d,6'h1c,6'h1b:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-23:0],{(4+23){1'b0}} }; //Precision_ctl_S+1
end
6'h1a,6'h19,6'h18:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-26:0],{(4+26){1'b0}} }; //Precision_ctl_S+1
end
6'h17,6'h16,6'h15:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-29:0],{(4+29){1'b0}} }; //Precision_ctl_S+1
end
6'h14,6'h13,6'h12:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-32:0],{(4+32){1'b0}} }; //Precision_ctl_S+1
end
6'h11,6'h10,6'h0f:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-35:0],{(4+35){1'b0}} }; //Precision_ctl_S+1
end
6'h0e,6'h0d,6'h0c:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-38:0],{(4+38){1'b0}} }; //Precision_ctl_S+1
end
6'h0b,6'h0a,6'h09:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-41:0],{(4+41){1'b0}} }; //Precision_ctl_S+1
end
6'h08,6'h07,6'h06:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-44:0],{(4+44){1'b0}} }; //Precision_ctl_S+1
end
default:
begin
Mant_result_prenorm_DO = Quotient_DP[C_MANT_FP64+4:0]; //+4
end
endcase
end
2'b10:
begin
case (Precision_ctl_S)
6'b00:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16+4:0],{(C_MANT_FP64-C_MANT_FP16){1'b0}} }; //+4
end
6'h0a,6'h09:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16+1:1],{(C_MANT_FP64-C_MANT_FP16+4){1'b0}} }; //Precision_ctl_S+1
end
6'h08,6'h07,6'h06:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16-2:0],{(C_MANT_FP64-C_MANT_FP16+4+2){1'b0}} }; //Precision_ctl_S+1
end
default :
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16+4:0],{(C_MANT_FP64-C_MANT_FP16){1'b0}} }; //+4
end
endcase
end
2'b11:
begin
case (Precision_ctl_S)
6'b00:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16ALT+4:0],{(C_MANT_FP64-C_MANT_FP16ALT){1'b0}} }; //+4
end
6'h07,6'h06:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16ALT+1:1],{(C_MANT_FP64-C_MANT_FP16ALT+4){1'b0}} }; //Precision_ctl_S+1
end
default :
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16ALT+4:0],{(C_MANT_FP64-C_MANT_FP16ALT){1'b0}} }; //+4
end
endcase
end
endcase
end
end
endgenerate
//////////////////////three iteration units, end//////////////////////////////////////////
//////////////////////four iteration units, start///////////////////////////////////////
generate
if(Iteration_unit_num_S==2'b11)
begin
always_comb
begin
case (Format_sel_S)
2'b00:
begin
case (Precision_ctl_S)
6'h00:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32+4:0],{(C_MANT_FP64-C_MANT_FP32){1'b0}}}; //+4
end
6'h17,6'h16,6'h15,6'h14:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32:0],{(C_MANT_FP64-C_MANT_FP32+4){1'b0}}}; //Precision_ctl_S+1
end
6'h13,6'h12,6'h11,6'h10:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-4:0],{(C_MANT_FP64-C_MANT_FP32+4+4){1'b0}}}; //Precision_ctl_S+1
end
6'h0f,6'h0e,6'h0d,6'h0c:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-8:0],{(C_MANT_FP64-C_MANT_FP32+4+8){1'b0}}}; //Precision_ctl_S+1
end
6'h0b,6'h0a,6'h09,6'h08:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-12:0],{(C_MANT_FP64-C_MANT_FP32+4+12){1'b0}}}; //Precision_ctl_S+1
end
6'h07,6'h06:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32-16:0],{(C_MANT_FP64-C_MANT_FP32+4+16){1'b0}}}; //Precision_ctl_S+1
end
default:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP32+4:0],{(C_MANT_FP64-C_MANT_FP32){1'b0}}}; //+4
end
endcase
end
2'b01:
begin
case (Precision_ctl_S)
6'h00:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64+3:0],{(1){1'b0}}}; //+3
end
6'h34:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64+3:0],{(1){1'b0}} }; //Precision_ctl_S+1
end
6'h33,6'h32,6'h31,6'h30:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-1:0],{(5){1'b0}} }; //Precision_ctl_S+1
end
6'h2f,6'h2e,6'h2d,6'h2c:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-5:0],{(9){1'b0}} }; //Precision_ctl_S+1
end
6'h2b,6'h2a,6'h29,6'h28:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-9:0],{(13){1'b0}} }; //Precision_ctl_S+1
end
6'h27,6'h26,6'h25,6'h24:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-13:0],{(17){1'b0}} }; //Precision_ctl_S+1
end
6'h23,6'h22,6'h21,6'h20:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-17:0],{(21){1'b0}} }; //Precision_ctl_S+1
end
6'h1f,6'h1e,6'h1d,6'h1c:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-21:0],{(25){1'b0}} }; //Precision_ctl_S+1
end
6'h1b,6'h1a,6'h19,6'h18:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-25:0],{(29){1'b0}} }; //Precision_ctl_S+1
end
6'h17,6'h16,6'h15,6'h14:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-29:0],{(33){1'b0}} }; //Precision_ctl_S+1
end
6'h13,6'h12,6'h11,6'h10:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-33:0],{(37){1'b0}} }; //Precision_ctl_S+1
end
6'h0f,6'h0e,6'h0d,6'h0c:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-37:0],{(41){1'b0}} }; //Precision_ctl_S+1
end
6'h0b,6'h0a,6'h09,6'h08:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-41:0],{(45){1'b0}} }; //Precision_ctl_S+1
end
6'h07,6'h06:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64-45:0],{(49){1'b0}} }; //Precision_ctl_S+1
end
default:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP64+3:0],{(1){1'b0}}}; //+3
end
endcase
end
2'b10:
begin
case (Precision_ctl_S)
6'b00:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16+5:0],{(C_MANT_FP64-C_MANT_FP16-1){1'b0}} }; //+5
end
6'h0a,6'h09,6'h08:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16+1:1],{(C_MANT_FP64-C_MANT_FP16+4){1'b0}} }; //Precision_ctl_S+1
end
6'h07,6'h06:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16+1-4:0],{(C_MANT_FP64-C_MANT_FP16+4+3){1'b0}} }; //Precision_ctl_S+1
end
default :
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16+5:0],{(C_MANT_FP64-C_MANT_FP16-1){1'b0}} }; //+5
end
endcase
end
2'b11:
begin
case (Precision_ctl_S)
6'b00:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16ALT+4:0],{(C_MANT_FP64-C_MANT_FP16ALT){1'b0}} }; //+4
end
6'h07,6'h06:
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16ALT:0],{(C_MANT_FP64-C_MANT_FP16ALT+4){1'b0}} }; //Precision_ctl_S+1
end
default :
begin
Mant_result_prenorm_DO = {Quotient_DP[C_MANT_FP16ALT+4:0],{(C_MANT_FP64-C_MANT_FP16ALT){1'b0}} }; //+4
end
endcase
end
endcase
end
end
endgenerate
//////////////////////four iteration units, end///////////////////////////////////////
// resultant exponent
logic [C_EXP_FP64+1:0] Exp_result_prenorm_DN,Exp_result_prenorm_DP;
logic [C_EXP_FP64+1:0] Exp_add_a_D;
logic [C_EXP_FP64+1:0] Exp_add_b_D;
logic [C_EXP_FP64+1:0] Exp_add_c_D;
integer C_BIAS_AONE, C_HALF_BIAS;
always_comb
begin //
case (Format_sel_S)
2'b00:
begin
C_BIAS_AONE =C_BIAS_AONE_FP32;
C_HALF_BIAS =C_HALF_BIAS_FP32;
end
2'b01:
begin
C_BIAS_AONE =C_BIAS_AONE_FP64;
C_HALF_BIAS =C_HALF_BIAS_FP64;
end
2'b10:
begin
C_BIAS_AONE =C_BIAS_AONE_FP16;
C_HALF_BIAS =C_HALF_BIAS_FP16;
end
2'b11:
begin
C_BIAS_AONE =C_BIAS_AONE_FP16ALT;
C_HALF_BIAS =C_HALF_BIAS_FP16ALT;
end
endcase
end
//For division, exponent=(Exp_a_D-LZ1)-(Exp_b_D-LZ2)+BIAS
//For square root, exponent=(Exp_a_D-LZ1)/2+(Exp_a_D-LZ1)%2+C_HALF_BIAS
//For exponent, in preprorces module, (Exp_a_D-LZ1) and (Exp_b_D-LZ2) have been processed with the corresponding process for denormal numbers.
assign Exp_add_a_D = {Sqrt_start_dly_S?{Exp_num_DI[C_EXP_FP64],Exp_num_DI[C_EXP_FP64],Exp_num_DI[C_EXP_FP64],Exp_num_DI[C_EXP_FP64:1]}:{Exp_num_DI[C_EXP_FP64],Exp_num_DI[C_EXP_FP64],Exp_num_DI}};
assign Exp_add_b_D = {Sqrt_start_dly_S?{1'b0,{C_EXP_ZERO_FP64},Exp_num_DI[0]}:{~Exp_den_DI[C_EXP_FP64],~Exp_den_DI[C_EXP_FP64],~Exp_den_DI}};
assign Exp_add_c_D = {Div_start_dly_S?{{C_BIAS_AONE}}:{{C_HALF_BIAS}}};
assign Exp_result_prenorm_DN = (Start_dly_S)?{Exp_add_a_D + Exp_add_b_D + Exp_add_c_D}:Exp_result_prenorm_DP;
always_ff @(posedge Clk_CI, negedge Rst_RBI)
begin
if(~Rst_RBI)
begin
Exp_result_prenorm_DP <= '0;
end
else
begin
Exp_result_prenorm_DP<= Exp_result_prenorm_DN;
end
end
assign Exp_result_prenorm_DO = Exp_result_prenorm_DP;
endmodule