1 /* $NetBSD: ieeefp.h,v 1.10 2016/08/25 07:39:55 christos Exp $ */ 2 3 /* 4 * Written by J.T. Conklin, Apr 28, 1995 5 * Public domain. 6 */ 7 8 #ifndef _ALPHA_IEEEFP_H_ 9 #define _ALPHA_IEEEFP_H_ 10 11 #include <sys/featuretest.h> 12 13 #if defined(_NETBSD_SOURCE) || defined(_ISOC99_SOURCE) 14 15 #include <machine/fenv.h> 16 17 #if !defined(_ISOC99_SOURCE) 18 19 typedef int fp_except; 20 21 #if defined(_KERNEL) 22 23 #include <sys/param.h> 24 #include <sys/proc.h> 25 #include <machine/fpu.h> 26 #include <machine/alpha.h> 27 28 /* FP_X_IOV is intentionally omitted from the architecture flags mask */ 29 30 #define FP_AA_FLAGS (FP_X_INV | FP_X_DZ | FP_X_OFL | FP_X_UFL | FP_X_IMP) 31 32 #define float_raise(f) \ 33 do curlwp->l_md.md_flags |= NETBSD_FLAG_TO_FP_C(f); \ 34 while(0) 35 36 #define float_set_inexact() float_raise(FP_X_IMP) 37 #define float_set_invalid() float_raise(FP_X_INV) 38 #define fpgetround() (alpha_read_fpcr() >> 58 & 3) 39 40 #endif /* _KERNEL */ 41 42 #define FP_X_INV FE_INVALID /* invalid operation exception */ 43 #define FP_X_DZ FE_DIVBYZERO /* divide-by-zero exception */ 44 #define FP_X_OFL FE_OVERFLOW /* overflow exception */ 45 #define FP_X_UFL FE_UNDERFLOW /* underflow exception */ 46 #define FP_X_IMP FE_INEXACT /* imprecise (prec. loss; "inexact") */ 47 #define FP_X_IOV FE_INTOVF /* integer overflow */ 48 49 /* 50 * fp_rnd bits match the fpcr, below, as well as bits 12:11 51 * in fp operate instructions 52 */ 53 typedef enum { 54 FP_RZ = FE_TOWARDZERO, /* round to zero (truncate) */ 55 FP_RM = FE_DOWNWARD, /* round toward negative infinity */ 56 FP_RN = FE_TONEAREST, /* round to nearest representable number */ 57 FP_RP = FE_UPWARD, /* round toward positive infinity */ 58 _FP_DYNAMIC=FP_RP 59 } fp_rnd; 60 61 #endif /* !_ISOC99_SOURCE */ 62 63 #endif /* _NETBSD_SOURCE || _ISOC99_SOURCE */ 64 65 #endif /* _ALPHA_IEEEFP_H_ */ 66