53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
/* $NetBSD: ieeefp.h,v 1.1 2001/01/10 19:02:06 bjh21 Exp $ */
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/*-
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* Based on ieeefp.h written by J.T. Conklin, Apr 28, 1995
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* Public domain.
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*/
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#ifndef _MACHINE_IEEEFP_H_
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#define _MACHINE_IEEEFP_H_
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/* Deprecated historical FPU control interface */
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/* FP exception codes */
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#define FP_EXCEPT_INV 0
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#define FP_EXCEPT_DZ 1
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#define FP_EXCEPT_OFL 2
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#define FP_EXCEPT_UFL 3
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#define FP_EXCEPT_IMP 4
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/* Exception type (used by fpsetmask() et al.) */
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typedef int fp_except;
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/* Bit defines for fp_except */
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#define FP_X_INV (1 << FP_EXCEPT_INV) /* invalid operation exception */
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#define FP_X_DZ (1 << FP_EXCEPT_DZ) /* divide-by-zero exception */
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#define FP_X_OFL (1 << FP_EXCEPT_OFL) /* overflow exception */
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#define FP_X_UFL (1 << FP_EXCEPT_UFL) /* underflow exception */
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#define FP_X_IMP (1 << FP_EXCEPT_IMP) /* imprecise (loss of precision; "inexact") */
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/* Rounding modes */
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typedef enum {
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FP_RN=0, /* round to nearest representable number */
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FP_RP=1, /* round toward positive infinity */
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FP_RM=2, /* round toward negative infinity */
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FP_RZ=3 /* round to zero (truncate) */
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} fp_rnd_t;
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/*
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* FP precision modes
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*/
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typedef enum {
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FP_PS=0, /* 24 bit (single-precision) */
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FP_PRS, /* reserved */
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FP_PD, /* 53 bit (double-precision) */
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FP_PE /* 64 bit (extended-precision) */
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} fp_prec_t;
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#define fp_except_t int
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#endif /* _MACHINE_IEEEFP_H_ */
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