1 /* $NetBSD: fenv.h,v 1.2 2014/01/29 00:22:09 matt Exp $ */ 2 3 /* 4 * Based on ieeefp.h written by J.T. Conklin, Apr 28, 1995 5 * Public domain. 6 */ 7 8 #ifndef _AARCH64_FENV_H_ 9 #define _AARCH64_FENV_H_ 10 11 /* AArch64 split FPSCR into two registers FPCR and FPSR */ 12 typedef struct { 13 unsigned int __fpcr; 14 unsigned int __fpsr; 15 } fenv_t; 16 typedef int fexcept_t; 17 18 #define FE_INVALID 0x01 /* invalid operation exception */ 19 #define FE_DIVBYZERO 0x02 /* divide-by-zero exception */ 20 #define FE_OVERFLOW 0x04 /* overflow exception */ 21 #define FE_UNDERFLOW 0x08 /* underflow exception */ 22 #define FE_INEXACT 0x10 /* imprecise (loss of precision; "inexact") */ 23 24 #define FE_ALL_EXCEPT 0x1f 25 26 #define FE_TONEAREST 0 /* round to nearest representable number */ 27 #define FE_UPWARD 1 /* round toward positive infinity */ 28 #define FE_DOWNWARD 2 /* round toward negative infinity */ 29 #define FE_TOWARDZERO 3 /* round to zero (truncate) */ 30 31 __BEGIN_DECLS 32 33 /* Default floating-point environment */ 34 extern const fenv_t __fe_dfl_env; 35 #define FE_DFL_ENV (&__fe_dfl_env) 36 37 __END_DECLS 38 39 #endif /* _AARCH64_FENV_H_ */ 40