63 lines
1.8 KiB
C
63 lines
1.8 KiB
C
/*
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* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
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*
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* @APPLE_LICENSE_HEADER_START@
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*
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* The contents of this file constitute Original Code as defined in and
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* are subject to the Apple Public Source License Version 1.1 (the
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* "License"). You may not use this file except in compliance with the
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* License. Please obtain a copy of the License at
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* http://www.apple.com/publicsource and read it before using this file.
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*
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* This Original Code and all software distributed under the License are
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* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
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* License for the specific language governing rights and limitations
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* under the License.
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*
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* @APPLE_LICENSE_HEADER_END@
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*/
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/* Copyright (c) 1992, NeXT Computer, Inc. All rights reserved.
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*
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* File: libc/m98k/gen/fp.h
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* Author: Derek B Clegg, NeXT Computer, Inc.
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*
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* HISTORY
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* 11-Nov-92 Derek B Clegg (dclegg@next.com)
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* Created.
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*
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* Common definitions for floating-point numbers.
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*/
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/* The following definitions for for double precision IEEE format numbers. */
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#define EXPONENT_BIAS 1023
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#define SIGN_BITS 1
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#define EXPONENT_BITS 11
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#define FRACTION_BITS 52
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#define HI_FRACTION_BITS 20
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#define LO_FRACTION_BITS 32
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struct double_format {
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unsigned sign: SIGN_BITS;
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unsigned exponent: EXPONENT_BITS;
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unsigned hi_fraction: HI_FRACTION_BITS;
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unsigned lo_fraction: LO_FRACTION_BITS;
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};
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union dbl {
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struct double_format s;
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unsigned int u[2];
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double value;
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};
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#define PlusInfinity (1.0/0.0)
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#define MinusInfinity (-1.0/0.0)
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#define not_a_number(x) ((x) != (x))
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#define positive_infinity(x) ((x) == PlusInfinity)
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#define negative_infinity(x) ((x) == MinusInfinity)
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