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setovfl.c revision 1.4.20.1 
      1 /*	$NetBSD: setovfl.c,v 1.4.20.1 2007/01/12 01:00:49 ad Exp $	*/
      2 
      3 /*	$OpenBSD: setovfl.c,v 1.4 2001/03/29 03:58:19 mickey Exp $	*/
      4 
      5 /*
      6  * Copyright 1996 1995 by Open Software Foundation, Inc.
      7  *              All Rights Reserved
      8  *
      9  * Permission to use, copy, modify, and distribute this software and
     10  * its documentation for any purpose and without fee is hereby granted,
     11  * provided that the above copyright notice appears in all copies and
     12  * that both the copyright notice and this permission notice appear in
     13  * supporting documentation.
     14  *
     15  * OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
     16  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
     17  * FOR A PARTICULAR PURPOSE.
     18  *
     19  * IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
     20  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
     21  * LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
     22  * NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
     23  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     24  *
     25  */
     26 /*
     27  * pmk1.1
     28  */
     29 /*
     30  * (c) Copyright 1986 HEWLETT-PACKARD COMPANY
     31  *
     32  * To anyone who acknowledges that this file is provided "AS IS"
     33  * without any express or implied warranty:
     34  *     permission to use, copy, modify, and distribute this file
     35  * for any purpose is hereby granted without fee, provided that
     36  * the above copyright notice and this notice appears in all
     37  * copies, and that the name of Hewlett-Packard Company not be
     38  * used in advertising or publicity pertaining to distribution
     39  * of the software without specific, written prior permission.
     40  * Hewlett-Packard Company makes no representations about the
     41  * suitability of this software for any purpose.
     42  */
     43 
     44 #include <sys/cdefs.h>
     45 __KERNEL_RCSID(0, "$NetBSD: setovfl.c,v 1.4.20.1 2007/01/12 01:00:49 ad Exp $");
     46 
     47 #include "../spmath/float.h"
     48 #include "../spmath/sgl_float.h"
     49 #include "../spmath/dbl_float.h"
     50 
     51 sgl_floating_point
     52 sgl_setoverflow(sign)
     53 	unsigned int sign;
     54 {
     55 	sgl_floating_point result;
     56 
     57 	/* set result to infinity or largest number */
     58 #if 0
     59 	switch (Rounding_mode()) {
     60 		case ROUNDPLUS:
     61 			if (sign) {
     62 				Sgl_setlargestnegative(result);
     63 			} else {
     64 				Sgl_setinfinitypositive(result);
     65 			}
     66 			break;
     67 		case ROUNDMINUS:
     68 			if (sign==0) {
     69 				Sgl_setlargestpositive(result);
     70 			} else {
     71 				Sgl_setinfinitynegative(result);
     72 			}
     73 			break;
     74 		case ROUNDNEAREST:
     75 			Sgl_setinfinity(result,sign);
     76 			break;
     77 		default:
     78 		case ROUNDZERO:
     79 			Sgl_setlargest(result,sign);
     80 			break;
     81 	}
     82 #endif
     83 	Sgl_setinfinity(result,sign);
     84 	return(result);
     85 }
     86 
     87 dbl_floating_point dbl_setoverflow(sign)
     88 
     89 unsigned int sign;
     90 {
     91 	dbl_floating_point result;
     92 
     93 	/* set result to infinity or largest number */
     94 	/* ignore for now
     95 	switch (Rounding_mode()) {
     96 		case ROUNDPLUS:
     97 			if (sign) {
     98 				Dbl_setlargestnegative(result);
     99 			}
    100 			else {
    101 				Dbl_setinfinitypositive(result);
    102 			}
    103 			break;
    104 		case ROUNDMINUS:
    105 			if (sign==0) {
    106 				Dbl_setlargestpositive(result);
    107 			}
    108 			else {
    109 				Dbl_setinfinitynegative(result);
    110 			}
    111 			break;
    112 		case ROUNDNEAREST:
    113 			Dbl_setinfinity(result,sign);
    114 			break;
    115 		case ROUNDZERO:
    116 			Dbl_setlargest(result,sign);
    117 	}
    118 	*/
    119 	Dbl_setinfinity(result.wd0,result.wd1,sign);
    120 	return(result);
    121 }
    122