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