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1 | 13 | up20180614 | /* $NetBSD: ieeefp.h,v 1.4 2011/03/26 19:52:20 christos Exp $ */
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2 | |||
3 | /*
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4 | * Written by J.T. Conklin, Apr 6, 1995
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5 | * Public domain.
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6 | */
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7 | |||
8 | #ifndef _X86_IEEEFP_H_
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9 | #define _X86_IEEEFP_H_
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10 | |||
11 | #include <sys/featuretest.h> |
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12 | #include <machine/fenv.h> |
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13 | |||
14 | typedef int fp_except; |
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15 | #define FP_X_INV FE_INVALID /* invalid operation exception */ |
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16 | #define FP_X_DNML FE_DENORMAL /* denormalization exception */ |
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17 | #define FP_X_DZ FE_DIVBYZERO /* divide-by-zero exception */ |
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18 | #define FP_X_OFL FE_OVERFLOW /* overflow exception */ |
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19 | #define FP_X_UFL FE_UNDERFLOW /* underflow exception */ |
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20 | #define FP_X_IMP FE_INEXACT /* imprecise (loss of precision) */ |
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21 | |||
22 | typedef enum { |
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23 | FP_RN=FE_TONEAREST, /* round to nearest representable num */
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24 | FP_RM=FE_DOWNWARD, /* round toward negative infinity */
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25 | FP_RP=FE_UPWARD, /* round toward positive infinity */
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26 | FP_RZ=FE_TOWARDZERO /* round to zero (truncate) */
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27 | } fp_rnd; |
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28 | |||
29 | typedef enum { |
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30 | FP_PS = 0, /* 24 bit (single-precision) */ |
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31 | FP_PRS, /* reserved */
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32 | FP_PD, /* 53 bit (double-precision) */
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33 | FP_PE /* 64 bit (extended-precision) */
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34 | } fp_prec; |
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35 | |||
36 | |||
37 | #endif /* _X86_IEEEFP_H_ */ |