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rtl/DW_mult_pipe.v
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////////////////////////////////////////////////////////////////////////////////
//
// This confidential and proprietary software may be used only
// as authorized by a licensing agreement from Synopsys Inc.
// In the event of publication, the following notice is applicable:
//
// (C) COPYRIGHT 2002 - 2018 SYNOPSYS INC.
// ALL RIGHTS RESERVED
//
// The entire notice above must be reproduced on all authorized
// copies.
//
// AUTHOR: Rajeev Huralikoppi Feb 15, 2002
//
// VERSION: Verilog Simulation Architecture
//
// DesignWare_version: 4e25d03d
// DesignWare_release: O-2018.06-DWBB_201806.3
//
////////////////////////////////////////////////////////////////////////////////
//-----------------------------------------------------------------------------
// ABSTRACT: An n stage pipelined multipler simulation model
//
// Parameters Valid Values Description
// ========== ========= ===========
// a_width >= 1 default: none
// Word length of a
//
// b_width >= 1 default: none
// Word length of b
//
// num_stages >= 2 default: 2
// Number of pipelined stages
//
// stall_mode 0 or 1 default: 1
// Stall mode
// 0 => non-stallable
// 1 => stallable
//
// rst_mode 0 to 2 default: 1
// Reset mode
// 0 => no reset
// 1 => asynchronous reset
// 2 => synchronous reset
//
// op_iso_mode 0 to 4 default: 0
// Type of operand isolation
// If 'stall_mode' is '0', this parameter is ignored and no isolation is applied
// 0 => Follow intent defined by Power Compiler user setting
// 1 => no operand isolation
// 2 => 'and' gate operand isolaton
// 3 => 'or' gate operand isolation
// 4 => preferred isolation style: 'and'
//
//
// Input Ports Size Description
// =========== ==== ============
// clk 1 Clock
// rst_n 1 Reset, active low
// en 1 Register enable, active high
// tc 1 2's complement control
// a a_width Multiplier
// b b_width Multiplicand
//
// product a_width+b_width Product (a*b)
//
// MODIFIED:
// RJK 05/14/15 Updated model to work with less propagated 'X's
// so as to be more friendly with VCS-NLP
//
// RJK 05/28/13 Updated documentation in comments to properly
// describe the "en" input (STAR 9000627580)
//
// DLL 02/01/08 Enhanced abstract and added "op_iso_mode" parameter
// and related code.
//
// DLL 11/14/05 Changed legality checking of 'num_stages'
// parameter along with its abstract "Valid Values"
//
//
//-----------------------------------------------------------------------------
module DW_mult_pipe (clk,rst_n,en,tc,a,b,product);
parameter integer a_width = 2;
parameter integer b_width = 2;
parameter integer num_stages = 2;
parameter integer stall_mode = 1;
parameter integer rst_mode = 1;
parameter integer op_iso_mode = 0;
input clk;
input rst_n;
input [a_width-1 : 0] a;
input [b_width-1 : 0] b;
input tc;
input en;
output [a_width+b_width-1: 0] product;
reg [a_width-1 : 0] a_reg [0 : num_stages-2];
reg [b_width-1 : 0] b_reg [0 : num_stages-2];
reg tc_reg [0 : num_stages-2];
// synopsys translate_off
//---------------------------------------------------------------------------
// Behavioral model
//---------------------------------------------------------------------------
generate
if (rst_mode == 0) begin : GEN_RSM_EQ_0
if (stall_mode == 0) begin : GEN_RM0_SM0
always @(posedge clk) begin: rm0_sm0_pipe_reg_PROC
integer i;
for(i= 0; i < num_stages-1; i=i+1) begin
if (i == 0) begin
a_reg[0] <= a;
b_reg[0] <= b;
tc_reg[0] <= tc;
end else begin
a_reg[i] <= a_reg[i-1];
b_reg[i] <= b_reg[i-1];
tc_reg[i] <= tc_reg[i-1];
end
end // for (i= 0; i < num_stages-1; i++)
end // block: rm0_pipe_reg_PROC
end else begin : GEN_RM0_SM1
always @(posedge clk) begin: rm0_sm1_pipe_reg_PROC
integer i;
for(i= 0; i < num_stages-1; i=i+1) begin
if (i == 0) begin
a_reg[0] <= (en == 1'b0)? a_reg[0] : ((en == 1'b1)? a : {a_width{1'bx}});
b_reg[0] <= (en == 1'b0)? b_reg[0] : ((en == 1'b1)? b : {b_width{1'bx}});
tc_reg[0] <= (en == 1'b0)? tc_reg[0]: ((en == 1'b1)? tc: 1'bx);
end else begin
a_reg[i] <= (en == 1'b0)? a_reg[i] : ((en == 1'b1)? a_reg[i-1] : {a_width{1'bx}});
b_reg[i] <= (en == 1'b0)? b_reg[i] : ((en == 1'b1)? b_reg[i-1] : {b_width{1'bx}});
tc_reg[i] <= (en == 1'b0)? tc_reg[i]: ((en == 1'b1)? tc_reg[i-1]: 1'bx);
end
end
end
end
end else if (rst_mode == 1) begin : GEN_RM_EQ_1
if (stall_mode == 0) begin : GEN_RM1_SM0
always @(posedge clk or negedge rst_n) begin: rm1_pipe_reg_PROC
integer i;
if (rst_n == 1'b0) begin
for (i= 0; i < num_stages-1; i=i+1) begin
a_reg[i] <= {a_width{1'b0}};
b_reg[i] <= {b_width{1'b0}};
tc_reg[i] <= 1'b0;
end // for (i= 0; i < num_stages-1; i++)
end else if (rst_n == 1'b1) begin
for(i= 0; i < num_stages-1; i=i+1) begin
if (i == 0) begin
a_reg[0] <= a;
b_reg[0] <= b;
tc_reg[0] <= tc;
end else begin
a_reg[i] <= a_reg[i-1];
b_reg[i] <= b_reg[i-1];
tc_reg[i] <= tc_reg[i-1];
end
end // for (i= 0; i < num_stages-1; i++)
end else begin // rst_n not 1'b0 and not 1'b1
for (i= 0; i < num_stages-1; i=i+1) begin
a_reg[i] <= {a_width{1'bx}};
b_reg[i] <= {b_width{1'bx}};
tc_reg[i] <= 1'bx;
end // for (i= 0; i < num_stages-1; i++)
end
end // block: rm1_pipe_reg_PROC
end else begin : GEN_RM1_SM1
always @(posedge clk or negedge rst_n) begin: rm1_pipe_reg_PROC
integer i;
if (rst_n == 1'b0) begin
for (i= 0; i < num_stages-1; i=i+1) begin
a_reg[i] <= {a_width{1'b0}};
b_reg[i] <= {b_width{1'b0}};
tc_reg[i] <= 1'b0;
end // for (i= 0; i < num_stages-1; i++)
end else if (rst_n == 1'b1) begin
for(i= 0; i < num_stages-1; i=i+1) begin
if (i == 0) begin
a_reg[0] <= (en == 1'b0)? a_reg[0] : ((en == 1'b1)? a : {a_width{1'bx}});
b_reg[0] <= (en == 1'b0)? b_reg[0] : ((en == 1'b1)? b : {b_width{1'bx}});
tc_reg[0] <= (en == 1'b0)? tc_reg[0]: ((en == 1'b1)? tc: 1'bx);
end else begin
a_reg[i] <= (en == 1'b0)? a_reg[i] : ((en == 1'b1)? a_reg[i-1] : {a_width{1'bx}});
b_reg[i] <= (en == 1'b0)? b_reg[i] : ((en == 1'b1)? b_reg[i-1] : {b_width{1'bx}});
tc_reg[i] <= (en == 1'b0)? tc_reg[i]: ((en == 1'b1)? tc_reg[i-1]: 1'bx);
end
end // for (i= 0; i < num_stages-1; i++)
end else begin // rst_n not 1'b0 and not 1'b1
for (i= 0; i < num_stages-1; i=i+1) begin
a_reg[i] <= {a_width{1'bx}};
b_reg[i] <= {b_width{1'bx}};
tc_reg[i] <= 1'bx;
end // for (i= 0; i < num_stages-1; i++)
end
end // block: rm1_pipe_reg_PROC
end
end else begin : GEN_RM_GT_1
if (stall_mode == 0) begin : GEN_RM2_SM0
always @(posedge clk) begin: rm2_pipe_reg_PROC
integer i;
if (rst_n == 1'b0) begin
for (i= 0; i < num_stages-1; i=i+1) begin
a_reg[i] <= {a_width{1'b0}};
b_reg[i] <= {b_width{1'b0}};
tc_reg[i] <= 1'b0;
end // for (i= 0; i < num_stages-1; i++)
end else if (rst_n == 1'b1) begin
for(i= 0; i < num_stages-1; i=i+1) begin
if (i == 0) begin
a_reg[0] <= a;
b_reg[0] <= b;
tc_reg[0] <= tc;
end else begin
a_reg[i] <= a_reg[i-1];
b_reg[i] <= b_reg[i-1];
tc_reg[i] <= tc_reg[i-1];
end
end // for (i= 0; i < num_stages-1; i++)
end else begin // rst_n not 1'b0 and not 1'b1
for (i= 0; i < num_stages-1; i=i+1) begin
a_reg[i] <= {a_width{1'bx}};
b_reg[i] <= {b_width{1'bx}};
tc_reg[i] <= 1'bx;
end // for (i= 0; i < num_stages-1; i++)
end
end // block: rm2_pipe_reg_PROC
end else begin : GEN_RM2_SM1
always @(posedge clk) begin: rm2_pipe_reg_PROC
integer i;
if (rst_n == 1'b0) begin
for (i= 0; i < num_stages-1; i=i+1) begin
a_reg[i] <= {a_width{1'b0}};
b_reg[i] <= {b_width{1'b0}};
tc_reg[i] <= 1'b0;
end // for (i= 0; i < num_stages-1; i++)
end else if (rst_n == 1'b1) begin
for(i= 0; i < num_stages-1; i=i+1) begin
if (i == 0) begin
a_reg[0] <= (en == 1'b0)? a_reg[0] : ((en == 1'b1)? a : {a_width{1'bx}});
b_reg[0] <= (en == 1'b0)? b_reg[0] : ((en == 1'b1)? b : {b_width{1'bx}});
tc_reg[0] <= (en == 1'b0)? tc_reg[0]: ((en == 1'b1)? tc: 1'bx);
end else begin
a_reg[i] <= (en == 1'b0)? a_reg[i] : ((en == 1'b1)? a_reg[i-1] : {a_width{1'bx}});
b_reg[i] <= (en == 1'b0)? b_reg[i] : ((en == 1'b1)? b_reg[i-1] : {b_width{1'bx}});
tc_reg[i] <= (en == 1'b0)? tc_reg[i]: ((en == 1'b1)? tc_reg[i-1]: 1'bx);
end
end // for (i= 0; i < num_stages-1; i++)
end else begin // rst_n not 1'b0 and not 1'b1
for (i= 0; i < num_stages-1; i=i+1) begin
a_reg[i] <= {a_width{1'bx}};
b_reg[i] <= {b_width{1'bx}};
tc_reg[i] <= 1'bx;
end // for (i= 0; i < num_stages-1; i++)
end
end // block: rm2_pipe_reg_PROC
end
end
endgenerate
DW02_mult #(a_width, b_width)
U1 (.A(a_reg[num_stages-2]),
.B(b_reg[num_stages-2]),
.TC(tc_reg[num_stages-2]),
.PRODUCT(product));
//---------------------------------------------------------------------------
// Parameter legality check and initializations
//---------------------------------------------------------------------------
initial begin : parameter_check
integer param_err_flg;
param_err_flg = 0;
if (a_width < 1) begin
param_err_flg = 1;
$display(
"ERROR: %m :\n Invalid value (%d) for parameter a_width (lower bound: 1)",
a_width );
end
if (b_width < 1) begin
param_err_flg = 1;
$display(
"ERROR: %m :\n Invalid value (%d) for parameter b_width (lower bound: 1)",
b_width );
end
if (num_stages < 2) begin
param_err_flg = 1;
$display(
"ERROR: %m :\n Invalid value (%d) for parameter num_stages (lower bound: 2)",
num_stages );
end
if ( (stall_mode < 0) || (stall_mode > 1) ) begin
param_err_flg = 1;
$display(
"ERROR: %m :\n Invalid value (%d) for parameter stall_mode (legal range: 0 to 1)",
stall_mode );
end
if ( (rst_mode < 0) || (rst_mode > 2) ) begin
param_err_flg = 1;
$display(
"ERROR: %m :\n Invalid value (%d) for parameter rst_mode (legal range: 0 to 2)",
rst_mode );
end
if ( (op_iso_mode < 0) || (op_iso_mode > 4) ) begin
param_err_flg = 1;
$display(
"ERROR: %m :\n Invalid value (%d) for parameter op_iso_mode (legal range: 0 to 4)",
op_iso_mode );
end
if ( param_err_flg == 1) begin
$display(
"%m :\n Simulation aborted due to invalid parameter value(s)");
$finish;
end
end // parameter_check
//---------------------------------------------------------------------------
// Report unknown clock inputs
//---------------------------------------------------------------------------
always @ (clk) begin : clk_monitor
if ( (clk !== 1'b0) && (clk !== 1'b1) && ($time > 0) )
$display( "WARNING: %m :\n at time = %t, detected unknown value, %b, on clk input.",
$time, clk );
end // clk_monitor
// synopsys translate_on
endmodule //

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rtl/z_data_mux.v → rtl/OtherFile/z_data_mux.v
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