1129198Scognet/*	$NetBSD: ieeefp.h,v 1.1 2001/01/10 19:02:06 bjh21 Exp $	*/
2129198Scognet/* $FreeBSD$ */
3139735Simp/*-
4129198Scognet * Based on ieeefp.h written by J.T. Conklin, Apr 28, 1995
5129198Scognet * Public domain.
6129198Scognet */
7129198Scognet
8129198Scognet#ifndef _MACHINE_IEEEFP_H_
9129198Scognet#define _MACHINE_IEEEFP_H_
10129198Scognet
11226607Sdas/* Deprecated historical FPU control interface */
12226607Sdas
13129198Scognet/* FP exception codes */
14129198Scognet#define FP_EXCEPT_INV	0
15129198Scognet#define FP_EXCEPT_DZ	1
16129198Scognet#define FP_EXCEPT_OFL	2
17129198Scognet#define FP_EXCEPT_UFL	3
18129198Scognet#define FP_EXCEPT_IMP	4
19129198Scognet
20129198Scognet/* Exception type (used by fpsetmask() et al.) */
21129198Scognet
22129198Scognettypedef int fp_except;
23129198Scognet
24129198Scognet/* Bit defines for fp_except */
25129198Scognet
26129198Scognet#define	FP_X_INV	(1 << FP_EXCEPT_INV)	/* invalid operation exception */
27129198Scognet#define	FP_X_DZ		(1 << FP_EXCEPT_DZ)	/* divide-by-zero exception */
28129198Scognet#define	FP_X_OFL	(1 << FP_EXCEPT_OFL)	/* overflow exception */
29129198Scognet#define	FP_X_UFL	(1 << FP_EXCEPT_UFL)	/* underflow exception */
30129198Scognet#define	FP_X_IMP	(1 << FP_EXCEPT_IMP)	/* imprecise (loss of precision; "inexact") */
31129198Scognet
32129198Scognet/* Rounding modes */
33129198Scognet
34129198Scognettypedef enum {
35129198Scognet    FP_RN=0,			/* round to nearest representable number */
36129198Scognet    FP_RP=1,			/* round toward positive infinity */
37129198Scognet    FP_RM=2,			/* round toward negative infinity */
38129198Scognet    FP_RZ=3			/* round to zero (truncate) */
39129198Scognet} fp_rnd_t;
40129198Scognet
41129198Scognet/*
42129198Scognet * FP precision modes
43129198Scognet */
44129198Scognettypedef enum {
45129198Scognet	FP_PS=0,	/* 24 bit (single-precision) */
46129198Scognet	FP_PRS,		/* reserved */
47129198Scognet	FP_PD,		/* 53 bit (double-precision) */
48129198Scognet	FP_PE		/* 64 bit (extended-precision) */
49129198Scognet} fp_prec_t;
50129198Scognet
51129198Scognet#define fp_except_t	int
52129198Scognet
53129198Scognet#endif /* _MACHINE_IEEEFP_H_ */
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