1 /* $NetBSD: ieeefp.h,v 1.1 2001/01/10 19:02:06 bjh21 Exp $ */ 2 /* $FreeBSD$ */ 3 /*- 4 * Based on ieeefp.h written by J.T. Conklin, Apr 28, 1995 5 * Public domain. 6 */ 7 8 #ifndef _MACHINE_IEEEFP_H_ 9 #define _MACHINE_IEEEFP_H_ 10 11 /* Deprecated historical FPU control interface */ 12 13 /* FP exception codes */ 14 #define FP_EXCEPT_INV 0 15 #define FP_EXCEPT_DZ 1 16 #define FP_EXCEPT_OFL 2 17 #define FP_EXCEPT_UFL 3 18 #define FP_EXCEPT_IMP 4 19 20 /* Exception type (used by fpsetmask() et al.) */ 21 22 typedef int fp_except; 23 24 /* Bit defines for fp_except */ 25 26 #define FP_X_INV (1 << FP_EXCEPT_INV) /* invalid operation exception */ 27 #define FP_X_DZ (1 << FP_EXCEPT_DZ) /* divide-by-zero exception */ 28 #define FP_X_OFL (1 << FP_EXCEPT_OFL) /* overflow exception */ 29 #define FP_X_UFL (1 << FP_EXCEPT_UFL) /* underflow exception */ 30 #define FP_X_IMP (1 << FP_EXCEPT_IMP) /* imprecise (loss of precision; "inexact") */ 31 32 /* Rounding modes */ 33 34 typedef enum { 35 FP_RN=0, /* round to nearest representable number */ 36 FP_RP=1, /* round toward positive infinity */ 37 FP_RM=2, /* round toward negative infinity */ 38 FP_RZ=3 /* round to zero (truncate) */ 39 } fp_rnd_t; 40 41 /* 42 * FP precision modes 43 */ 44 typedef enum { 45 FP_PS=0, /* 24 bit (single-precision) */ 46 FP_PRS, /* reserved */ 47 FP_PD, /* 53 bit (double-precision) */ 48 FP_PE /* 64 bit (extended-precision) */ 49 } fp_prec_t; 50 51 #define fp_except_t int 52 53 #endif /* _MACHINE_IEEEFP_H_ */ 54