1 /* $NetBSD: ieeefp.h,v 1.7 2008/08/06 03:54:50 matt 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 typedef int 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 #define FE_IOVERFLOW 0x20 /* integer overflow */ 24 25 #define FE_ALL_EXCEPT 0x3f 26 27 /* 28 * These bits match the fpcr as well as bits 12:11 29 * in fp operate instructions 30 */ 31 #define FE_TOWARDZERO 0 /* round to zero (truncate) */ 32 #define FE_DOWNWARD 1 /* round toward negative infinity */ 33 #define FE_TONEAREST 2 /* round to nearest representable number */ 34 #define FE_UPWARD 3 /* round toward positive infinity */ 35 36 #if !defined(_ISOC99_SOURCE) 37 38 typedef int fp_except; 39 40 #if defined(_KERNEL) 41 42 #include <sys/param.h> 43 #include <sys/proc.h> 44 #include <machine/fpu.h> 45 #include <machine/alpha.h> 46 47 /* FP_X_IOV is intentionally omitted from the architecture flags mask */ 48 49 #define FP_AA_FLAGS (FP_X_INV | FP_X_DZ | FP_X_OFL | FP_X_UFL | FP_X_IMP) 50 51 #define float_raise(f) \ 52 do curlwp->l_md.md_flags |= NETBSD_FLAG_TO_FP_C(f); \ 53 while(0) 54 55 #define float_set_inexact() float_raise(FP_X_IMP) 56 #define float_set_invalid() float_raise(FP_X_INV) 57 #define fpgetround() (alpha_read_fpcr() >> 58 & 3) 58 59 #endif /* _KERNEL */ 60 61 #define FP_X_INV FE_INVALID /* invalid operation exception */ 62 #define FP_X_DZ FE_DIVBYZERO /* divide-by-zero exception */ 63 #define FP_X_OFL FE_OVERFLOW /* overflow exception */ 64 #define FP_X_UFL FE_UNDERFLOW /* underflow exception */ 65 #define FP_X_IMP FE_INEXACT /* imprecise (prec. loss; "inexact") */ 66 #define FP_X_IOV FE_IOVERFLOW /* integer overflow */ 67 68 /* 69 * fp_rnd bits match the fpcr, below, as well as bits 12:11 70 * in fp operate instructions 71 */ 72 typedef enum { 73 FP_RZ = FE_TOWARDZERO, /* round to zero (truncate) */ 74 FP_RM = FE_DOWNWARD, /* round toward negative infinity */ 75 FP_RN = FE_TONEAREST, /* round to nearest representable number */ 76 FP_RP = FE_UPWARD, /* round toward positive infinity */ 77 _FP_DYNAMIC=FP_RP 78 } fp_rnd; 79 80 #endif /* !_ISOC99_SOURCE */ 81 82 #endif /* _NETBSD_SOURCE || _ISOC99_SOURCE */ 83 84 #endif /* _ALPHA_IEEEFP_H_ */ 85