1/*	$NetBSD: fenv.h,v 1.6 2021/10/06 05:33:15 skrll Exp $	*/
 2
 3/*
 4 * Based on ieeefp.h written by J.T. Conklin, Apr 28, 1995
 5 * Public domain.
 6 */
 7
 8#ifndef _ARM_FENV_H_
 9#define _ARM_FENV_H_
10
11#include <sys/cdefs.h>
12
13#ifdef __ARM_PCS_AAPCS64
14/* AArch64 split FPSCR into two registers FPCR and FPSR */
15typedef struct {
16	unsigned int __fpcr;
17	unsigned int __fpsr;
18} fenv_t;
19#else
20typedef int fenv_t;		/* FPSCR */
21#endif
22typedef int fexcept_t;
23
24#define	FE_INVALID	0x01	/* invalid operation exception */
25#define	FE_DIVBYZERO	0x02	/* divide-by-zero exception */
26#define	FE_OVERFLOW	0x04	/* overflow exception */
27#define	FE_UNDERFLOW	0x08	/* underflow exception */
28#define	FE_INEXACT	0x10	/* imprecise (loss of precision; "inexact") */
29
30#define	FE_ALL_EXCEPT	0x1f
31
32#define	FE_TONEAREST	0	/* round to nearest representable number */
33#define	FE_UPWARD	1	/* round toward positive infinity */
34#define	FE_DOWNWARD	2	/* round toward negative infinity */
35#define	FE_TOWARDZERO	3	/* round to zero (truncate) */
36
37#ifdef __SOFTFP__
38
39/*
40 * Provide a platform-specific softfloat ABI.
41 */
42
43#include <arm/vfpreg.h>
44
45#define __FENV_GET_FLAGS(__envp)	__SHIFTOUT(*(__envp), VFP_FPSCR_CSUM)
46#define __FENV_GET_MASK(__envp)		__SHIFTOUT(*(__envp), VFP_FPSCR_ESUM)
47#define __FENV_GET_ROUND(__envp)	__SHIFTOUT(*(__envp), VFP_FPSCR_RMODE)
48#define __FENV_SET_FLAGS(__envp, __val) \
49	*(__envp) = __SHIFTIN((__val), VFP_FPSCR_CSUM)
50#define __FENV_SET_MASK(__envp, __val) \
51	*(__envp) = __SHIFTIN((__val), VFP_FPSCR_ESUM)
52#define __FENV_SET_ROUND(__envp, __val) \
53	*(__envp) = __SHIFTIN((__val), VFP_FPSCR_RMODE)
54
55#define __HAVE_FENV_SOFTFLOAT_DEFS
56
57#endif /* __SOFTFP__ */
58
59__BEGIN_DECLS
60
61/* Default floating-point environment */
62extern const fenv_t	__fe_dfl_env;
63#define FE_DFL_ENV	(&__fe_dfl_env)
64
65__END_DECLS
66
67#endif /* _ARM_FENV_H_ */