1/*	$NetBSD: ieeefp.h,v 1.1 2001/01/10 19:02:06 bjh21 Exp $	*/
2/* $FreeBSD$ */
3/*-
4 * Based on ieeefp.h written by J.T. Conklin, Apr 28, 1995
5 * Public domain.
6 */
7
8#ifndef _MACHINE_IEEEFP_H_
9#define _MACHINE_IEEEFP_H_
10
11/* Deprecated historical FPU control interface */
12
13/* FP exception codes */
14#define FP_EXCEPT_INV	0
15#define FP_EXCEPT_DZ	1
16#define FP_EXCEPT_OFL	2
17#define FP_EXCEPT_UFL	3
18#define FP_EXCEPT_IMP	4
19
20/* Exception type (used by fpsetmask() et al.) */
21
22typedef int fp_except;
23
24/* Bit defines for fp_except */
25
26#define	FP_X_INV	(1 << FP_EXCEPT_INV)	/* invalid operation exception */
27#define	FP_X_DZ		(1 << FP_EXCEPT_DZ)	/* divide-by-zero exception */
28#define	FP_X_OFL	(1 << FP_EXCEPT_OFL)	/* overflow exception */
29#define	FP_X_UFL	(1 << FP_EXCEPT_UFL)	/* underflow exception */
30#define	FP_X_IMP	(1 << FP_EXCEPT_IMP)	/* imprecise (loss of precision; "inexact") */
31
32/* Rounding modes */
33
34typedef enum {
35    FP_RN=0,			/* round to nearest representable number */
36    FP_RP=1,			/* round toward positive infinity */
37    FP_RM=2,			/* round toward negative infinity */
38    FP_RZ=3			/* round to zero (truncate) */
39} fp_rnd_t;
40
41/*
42 * FP precision modes
43 */
44typedef enum {
45	FP_PS=0,	/* 24 bit (single-precision) */
46	FP_PRS,		/* reserved */
47	FP_PD,		/* 53 bit (double-precision) */
48	FP_PE		/* 64 bit (extended-precision) */
49} fp_prec_t;
50
51#define fp_except_t	int
52
53#endif /* _MACHINE_IEEEFP_H_ */
54