[unix-history] / sys / sys / ieeefp.h

/*-
 * Copyright (c) 1990 Andrew Moore, Talke Studio
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * 	from: @(#) ieeefp.h 	1.0 (Berkeley) 9/23/93
 *	$Id$
 */

/*
 *	IEEE floating point type and constant definitions.
 */

#ifndef _IEEEFP_H_
#define _IEEEFP_H_

#ifdef __i386__

/*
 * FP rounding modes
 */
typedef enum {
	FP_RN=0,	/* round to nearest */
	FP_RM,		/* round down to minus infinity */
	FP_RP,		/* round up to plus infinity */
	FP_RZ		/* truncate */
} fp_rnd_t;

/*
 * FP precison modes
 */
typedef enum {
	FP_PS=0,	/* 24 bit (single-precsion) */
	FP_PRS,		/* reserved */
	FP_PD,		/* 53 bit (double-precision) */
	FP_PE		/* 64 bit (extended-precsion) */
} fp_prec_t;

#define fp_except_t	int

/*
 * FP exception masks
 */
#define FP_X_INV	0x01	/* invalid operation */
#define FP_X_DNML	0x02	/* denormal */
#define FP_X_DZ		0x04	/* zero divide */
#define FP_X_OFL	0x08	/* overflow */
#define FP_X_UFL	0x10	/* underflow */
#define FP_X_IMP	0x20	/* (im)precision */

/*
 * FP registers
 */
#define FP_MSKS_REG	0	/* exception masks */
#define FP_PRC_REG	0	/* precision */
#define FP_RND_REG	0	/* direction */
#define FP_STKY_REG	1	/* sticky flags */

/*
 * FP register bit field masks
 */
#define FP_MSKS_FLD	0x3f	/* exception masks field */
#define FP_PRC_FLD	0x300	/* precision control field */
#define FP_RND_FLD	0xc00	/* round control field */
#define FP_STKY_FLD	0x3f	/* sticky flags field */

/*
 * FP register bit field offsets
 */
#define FP_MSKS_OFF	0	/* exception masks offset */
#define FP_PRC_OFF	8	/* precision control offset */
#define FP_RND_OFF	10	/* round control offset */
#define FP_STKY_OFF	0	/* sticky flags offset */

#endif /* __i386__ */

#endif /* !_IEEEFP_H_ */
Commit	Line	Data
fb95bc90 AM	1	/*-
	2	* Copyright (c) 1990 Andrew Moore, Talke Studio
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*
01e1b05c RG	33	* from: @(#) ieeefp.h 1.0 (Berkeley) 9/23/93
01e1b05c RG	34	* $Id$
fb95bc90 AM	35	*/
	36
	37	/*
	38	* IEEE floating point type and constant definitions.
	39	*/
	40
	41	#ifndef _IEEEFP_H_
	42	#define _IEEEFP_H_
	43
	44	#ifdef __i386__
	45
	46	/*
	47	* FP rounding modes
	48	*/
	49	typedef enum {
	50	FP_RN=0, /* round to nearest */
	51	FP_RM, /* round down to minus infinity */
	52	FP_RP, /* round up to plus infinity */
	53	FP_RZ /* truncate */
	54	} fp_rnd_t;
	55
	56	/*
	57	* FP precison modes
	58	*/
	59	typedef enum {
	60	FP_PS=0, /* 24 bit (single-precsion) */
	61	FP_PRS, /* reserved */
	62	FP_PD, /* 53 bit (double-precision) */
	63	FP_PE /* 64 bit (extended-precsion) */
	64	} fp_prec_t;
	65
	66	#define fp_except_t int
	67
	68	/*
	69	* FP exception masks
	70	*/
	71	#define FP_X_INV 0x01 /* invalid operation */
	72	#define FP_X_DNML 0x02 /* denormal */
	73	#define FP_X_DZ 0x04 /* zero divide */
	74	#define FP_X_OFL 0x08 /* overflow */
	75	#define FP_X_UFL 0x10 /* underflow */
	76	#define FP_X_IMP 0x20 /* (im)precision */
	77
	78	/*
	79	* FP registers
	80	*/
	81	#define FP_MSKS_REG 0 /* exception masks */
	82	#define FP_PRC_REG 0 /* precision */
	83	#define FP_RND_REG 0 /* direction */
	84	#define FP_STKY_REG 1 /* sticky flags */
	85
	86	/*
	87	* FP register bit field masks
	88	*/
	89	#define FP_MSKS_FLD 0x3f /* exception masks field */
	90	#define FP_PRC_FLD 0x300 /* precision control field */
	91	#define FP_RND_FLD 0xc00 /* round control field */
	92	#define FP_STKY_FLD 0x3f /* sticky flags field */
	93
	94	/*
	95	* FP register bit field offsets
	96	*/
	97	#define FP_MSKS_OFF 0 /* exception masks offset */
	98	#define FP_PRC_OFF 8 /* precision control offset */
99	#define FP_RND_OFF 10 /* round control offset */
100	#define FP_STKY_OFF 0 /* sticky flags offset */
101
102	#endif /* __i386__ */
103
104	#endif /* !_IEEEFP_H_ */