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_ */