1 /* $NetBSD: mathimpl.h,v 1.6 2002/06/15 09:39:52 wiz Exp $ */ 2 /* 3 * Copyright (c) 1988, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by the University of 17 * California, Berkeley and its contributors. 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)mathimpl.h 8.1 (Berkeley) 6/4/93 35 */ 36 #ifndef _NOIEEE_SRC_MATHIMPL_H_ 37 #define _NOIEEE_SRC_MATHIMPL_H_ 38 39 #include <sys/cdefs.h> 40 #include <math.h> 41 42 #if defined(__vax__)||defined(tahoe) 43 44 /* Deal with different ways to concatenate in cpp */ 45 #define cat3(a,b,c) a ## b ## c 46 47 /* Deal with vax/tahoe byte order issues */ 48 # ifdef __vax__ 49 # define cat3t(a,b,c) cat3(a,b,c) 50 # else 51 # define cat3t(a,b,c) cat3(a,c,b) 52 # endif 53 54 # define vccast(name) (*(const double *)(cat3(__,name,x))) 55 56 /* 57 * Define a constant to high precision on a Vax or Tahoe. 58 * 59 * Args are the name to define, the decimal floating point value, 60 * four 16-bit chunks of the float value in hex 61 * (because the vax and tahoe differ in float format!), the power 62 * of 2 of the hex-float exponent, and the hex-float mantissa. 63 * Most of these arguments are not used at compile time; they are 64 * used in a post-check to make sure the constants were compiled 65 * correctly. 66 * 67 * People who want to use the constant will have to do their own 68 * #define foo vccast(foo) 69 * since CPP cannot do this for them from inside another macro (sigh). 70 * We define "vccast" if this needs doing. 71 */ 72 #ifdef _LIBM_DECLARE 73 # define vc(name, value, x1,x2,x3,x4, bexp, xval) \ 74 const long cat3(__,name,x)[] = {cat3t(0x,x1,x2), cat3t(0x,x3,x4)}; 75 #elif defined(_LIBM_STATIC) 76 # define vc(name, value, x1,x2,x3,x4, bexp, xval) \ 77 static const long cat3(__,name,x)[] = {cat3t(0x,x1,x2), cat3t(0x,x3,x4)}; 78 #else 79 # define vc(name, value, x1,x2,x3,x4, bexp, xval) \ 80 extern const long cat3(__,name,x)[]; 81 #endif 82 # define ic(name, value, bexp, xval) ; 83 84 #else /* __vax__ or tahoe */ 85 86 /* Hooray, we have an IEEE machine */ 87 # undef vccast 88 # define vc(name, value, x1,x2,x3,x4, bexp, xval) ; 89 90 #ifdef _LIBM_DECLARE 91 # define ic(name, value, bexp, xval) \ 92 const double __CONCAT(__,name) = value; 93 #elif _LIBM_STATIC 94 # define ic(name, value, bexp, xval) \ 95 static const double __CONCAT(__,name) = value; 96 #else 97 # define ic(name, value, bexp, xval) \ 98 extern const double __CONCAT(__,name); 99 #endif 100 101 #endif /* defined(__vax__)||defined(tahoe) */ 102 103 104 /* 105 * Functions internal to the math package, yet not static. 106 */ 107 extern double __exp__E(double, double); 108 extern double __log__L(double); 109 extern int infnan(int); 110 111 struct Double {double a, b;}; 112 double __exp__D(double, double); 113 struct Double __log__D(double); 114 115 #endif /* _NOIEEE_SRC_MATHIMPL_H_ */ 116