usr/src/lib/libbc/libc/gen/common/_Q_utoq.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 1988 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #include "_Qquad.h"
  30 #include "_Qglobals.h"
  31
  32 QUAD
  33 _Q_utoq(unsigned x)
  34 {
  35         unpacked        px;
  36         QUAD            q,c;
  37         int             *pc =(int*)&c;
  38         pc[0] = 0x401e0000; pc[1]=pc[2]=pc[3]=0;        /* pc = 2^31 */
  39         if((x&0x80000000)!=0) {
  40                 x ^= 0x80000000;
  41                 _fp_unpack(&px, (int *)&x,fp_op_integer);
  42                 _fp_pack(&px, (int *)&q,fp_op_extended);
  43                 q = _Q_add(q,c);
  44         } else {
  45                 _fp_unpack(&px, (int *)&x,fp_op_integer);
  46                 _fp_pack(&px, (int *)&q,fp_op_extended);
  47         }
  48         return (q);
  49 }