xref: /freebsd/sys/arm/include/ieeefp.h (revision c66ec88fed842fbaad62c30d510644ceb7bd2d71)
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 
22 typedef 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 
34 typedef 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  */
44 typedef 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