1 /* $NetBSD: mathimpl.h,v 1.7 2003/08/07 16:44:49 agc 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. Neither the name of the University nor the names of its contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * @(#)mathimpl.h 8.1 (Berkeley) 6/4/93 31 */ 32 #ifndef _NOIEEE_SRC_MATHIMPL_H_ 33 #define _NOIEEE_SRC_MATHIMPL_H_ 34 35 #include <sys/cdefs.h> 36 #include <math.h> 37 38 #if defined(__vax__)||defined(tahoe) 39 40 /* Deal with different ways to concatenate in cpp */ 41 #define cat3(a,b,c) a ## b ## c 42 43 /* Deal with vax/tahoe byte order issues */ 44 # ifdef __vax__ 45 # define cat3t(a,b,c) cat3(a,b,c) 46 # else 47 # define cat3t(a,b,c) cat3(a,c,b) 48 # endif 49 50 # define vccast(name) (*(const double *)(cat3(__,name,x))) 51 52 /* 53 * Define a constant to high precision on a Vax or Tahoe. 54 * 55 * Args are the name to define, the decimal floating point value, 56 * four 16-bit chunks of the float value in hex 57 * (because the vax and tahoe differ in float format!), the power 58 * of 2 of the hex-float exponent, and the hex-float mantissa. 59 * Most of these arguments are not used at compile time; they are 60 * used in a post-check to make sure the constants were compiled 61 * correctly. 62 * 63 * People who want to use the constant will have to do their own 64 * #define foo vccast(foo) 65 * since CPP cannot do this for them from inside another macro (sigh). 66 * We define "vccast" if this needs doing. 67 */ 68 #ifdef _LIBM_DECLARE 69 # define vc(name, value, x1,x2,x3,x4, bexp, xval) \ 70 const long cat3(__,name,x)[] = {cat3t(0x,x1,x2), cat3t(0x,x3,x4)}; 71 #elif defined(_LIBM_STATIC) 72 # define vc(name, value, x1,x2,x3,x4, bexp, xval) \ 73 static const long cat3(__,name,x)[] = {cat3t(0x,x1,x2), cat3t(0x,x3,x4)}; 74 #else 75 # define vc(name, value, x1,x2,x3,x4, bexp, xval) \ 76 extern const long cat3(__,name,x)[]; 77 #endif 78 # define ic(name, value, bexp, xval) ; 79 80 #else /* __vax__ or tahoe */ 81 82 /* Hooray, we have an IEEE machine */ 83 # undef vccast 84 # define vc(name, value, x1,x2,x3,x4, bexp, xval) ; 85 86 #ifdef _LIBM_DECLARE 87 # define ic(name, value, bexp, xval) \ 88 const double __CONCAT(__,name) = value; 89 #elif _LIBM_STATIC 90 # define ic(name, value, bexp, xval) \ 91 static const double __CONCAT(__,name) = value; 92 #else 93 # define ic(name, value, bexp, xval) \ 94 extern const double __CONCAT(__,name); 95 #endif 96 97 #endif /* defined(__vax__)||defined(tahoe) */ 98 99 100 /* 101 * Functions internal to the math package, yet not static. 102 */ 103 extern double __exp__E(double, double); 104 extern double __log__L(double); 105 extern int infnan(int); 106 107 struct Double {double a, b;}; 108 double __exp__D(double, double); 109 struct Double __log__D(double); 110 111 #endif /* _NOIEEE_SRC_MATHIMPL_H_ */ 112