/*      $NetBSD: fenv.h,v 1.6 2021/10/06 05:33:15 skrll 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) */

#ifdef __SOFTFP__

/*
 * Provide a platform-specific softfloat ABI.
 */

#include <arm/vfpreg.h>

#define __FENV_GET_FLAGS(__envp)        __SHIFTOUT(*(__envp), VFP_FPSCR_CSUM)
#define __FENV_GET_MASK(__envp)         __SHIFTOUT(*(__envp), VFP_FPSCR_ESUM)
#define __FENV_GET_ROUND(__envp)        __SHIFTOUT(*(__envp), VFP_FPSCR_RMODE)
#define __FENV_SET_FLAGS(__envp, __val) \
        *(__envp) = __SHIFTIN((__val), VFP_FPSCR_CSUM)
#define __FENV_SET_MASK(__envp, __val) \
        *(__envp) = __SHIFTIN((__val), VFP_FPSCR_ESUM)
#define __FENV_SET_ROUND(__envp, __val) \
        *(__envp) = __SHIFTIN((__val), VFP_FPSCR_RMODE)

#define __HAVE_FENV_SOFTFLOAT_DEFS

#endif /* __SOFTFP__ */

__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_ */