/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 1987 by Sun Microsystems, Inc.
 *      All rights reserved.
 */

#ifndef _SYS_FPU_IEEE_H
#define _SYS_FPU_IEEE_H

#pragma ident   "%Z%%M% %I%     %E% SMI"        /* SunOS-4.0 1.4 */

#ifdef  __cplusplus
extern "C" {
#endif

/*
 * Sparc IEEE floating-point support PUBLIC include file.
 */

/*      PUBLIC TYPES    */

/*
 * IEEE Arithmetic types... numbered to correspond to fsr fields.
 */

/*
 * rounding direction
 */
enum fp_rounding_direction {
        fp_rd_nearest   = 0,
        fp_rd_zero      = 1,
        fp_rd_plus      = 2,
        fp_rd_minus     = 3
};

/*
 * extended rounding precision
 */
enum fp_rounding_precision {
        fp_rp_extended  = 0,
        fp_rp_single    = 1,
        fp_rp_double    = 2,
        fp_rp_3         = 3
};

/*
 * exceptions according to cexc bit number
 */
enum fp_exception_type {
        fp_inexact      = 0,
        fp_divide       = 1,
        fp_underflow    = 2,
        fp_overflow     = 3,
        fp_invalid      = 4
};

/*
 * floating-point classes according to fclass
 */
enum fp_class_type {
        fp_zero         = 0,
        fp_normal       = 1,            /* Includes subnormal. */
        fp_infinity     = 2,
        fp_nan          = 3,            /* Includes quiet and signaling NaN. */
};


/* PUBLIC GLOBAL VARIABLES */

unsigned fp_accrued_exceptions; /* Sticky accumulated exceptions. */


/* PUBLIC FUNCTIONS */

#ifdef  __STDC__

extern enum
fp_rounding_direction swap_rounding_direction(enum fp_rounding_direction);

/* Change rounding mode; return previous. */

extern int swap_accrued_exceptions(int);

/* Change accrued exceptions; return previous. */

#else   /* __STDC__ */

extern enum fp_rounding_direction swap_rounding_direction(/* rd */);
/*      extern enum fp_rounding_direction rd;  */

/* Change rounding mode; return previous. */

extern int swap_accrued_exceptions(/* x */);
/*      int x; */

/* Change accrued exceptions; return previous. */

#endif  /* ! __STDC__ */

#ifdef  __cplusplus
}
#endif

#endif  /* _SYS_FPU_IEEE_H */