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 */ 15 typedef struct { 16 unsigned int __fpcr; 17 unsigned int __fpsr; 18 } fenv_t; 19 #else 20 typedef int fenv_t; /* FPSCR */ 21 #endif 22 typedef 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 */ 62 extern const fenv_t __fe_dfl_env; 63 #define FE_DFL_ENV (&__fe_dfl_env) 64 65 __END_DECLS 66 67 #endif /* _ARM_FENV_H_ */ 68