SVIncCompil/Testcases/UtdSV/sparc_ffu_part_add32.v

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// 
// OpenSPARC T1 Processor File: sparc_ffu_part_add32.v
// Copyright (c) 2006 Sun Microsystems, Inc.  All Rights Reserved.
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// 
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// License version 2 as published by the Free Software Foundation.
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// useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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// General Public License for more details.
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///////////////////////////////////////////////////////////////////////
/*
//  Module Name: sparc_ffu_part_add32
//      Description: This is the ffu VIS adder.  It can do either 
//				2 16 bit adds or 1 32 bit add.
*/
module sparc_ffu_part_add32 (/*AUTOARG*/
   // Outputs
   z, 
   // Inputs
   a, b, cin, add32
   ) ;
   input [31:0] a;
   input [31:0] b;
   input        cin;
   input        add32;

   output [31:0] z;

   wire          cout15; // carry out from lower 16 bit add
   wire          cin16; // carry in to the upper 16 bit add

   assign        cin16 = (add32)? cout15: cin;

   assign      {cout15, z[15:0]} = a[15:0]+b[15:0]+{15'b0,cin};   
   assign      z[31:16] = a[31:16]+b[31:16]+{15'b0,cin16};   
   
endmodule // sparc_ffu_part_add32