xref: /src/sys/arch/arm/include/fenv.h

/*	$NetBSD: fenv.h,v 1.3 2015/03/17 12:20:02 joerg Exp $	*/

/*
 * Based on ieeefp.h written by J.T. Conklin, Apr 28, 1995
 * Public domain.
 */

#ifndef _ARM_FENV_H_
#define _ARM_FENV_H_

#include <sys/cdefs.h>

#ifdef __ARM_PCS_AAPCS64
/* AArch64 split FPSCR into two registers FPCR and FPSR */
typedef struct {
	unsigned int __fpcr;
	unsigned int __fpsr;
} fenv_t;
#else
typedef int fenv_t;		/* FPSCR */
#endif
typedef int fexcept_t;

#define	FE_INVALID	0x01	/* invalid operation exception */
#define	FE_DIVBYZERO	0x02	/* divide-by-zero exception */
#define	FE_OVERFLOW	0x04	/* overflow exception */
#define	FE_UNDERFLOW	0x08	/* underflow exception */
#define	FE_INEXACT	0x10	/* imprecise (loss of precision; "inexact") */

#define	FE_ALL_EXCEPT	0x1f

#define	FE_TONEAREST	0	/* round to nearest representable number */
#define	FE_UPWARD	1	/* round toward positive infinity */
#define	FE_DOWNWARD	2	/* round toward negative infinity */
#define	FE_TOWARDZERO	3	/* round to zero (truncate) */

__BEGIN_DECLS

/* Default floating-point environment */
extern const fenv_t	__fe_dfl_env;
#define FE_DFL_ENV	(&__fe_dfl_env)

__END_DECLS

#endif /* _ARM_FENV_H_ */