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