sysdeps/generic/mathimpl.h

   1 /* This part here added by roland@prep.ai.mit.edu for the GNU C library.  */
   2
   3 #include <math.h>               /* Done first so we can #undef.  */
   4 #include <endian.h>
   5 #if     __BYTE_ORDER == __LITTLE_ENDIAN
   6 #undef national
   7 #define national
   8 #endif
   9
  10 #undef  isinf
  11 #define isinf   __isinf
  12 #undef  isnan
  13 #define isnan   __isnan
  14 #undef  infnan
  15 #define infnan  __infnan
  16 #undef  copysign
  17 #define copysign        __copysign
  18 #undef  scalb
  19 #define scalb   __scalb
  20 #undef  drem
  21 #define drem    __drem
  22 #undef  logb
  23 #define logb    __logb
  24 #undef  __finite
  25 #undef  finite
  26 #define finite  __finite
  27 #undef  expm1
  28 #define expm1   __expm1
  29
  30 /*
  31  * Copyright (c) 1988, 1993
  32  *      The Regents of the University of California.  All rights reserved.
  33  *
  34  * Redistribution and use in source and binary forms, with or without
  35  * modification, are permitted provided that the following conditions
  36  * are met:
  37  * 1. Redistributions of source code must retain the above copyright
  38  *    notice, this list of conditions and the following disclaimer.
  39  * 2. Redistributions in binary form must reproduce the above copyright
  40  *    notice, this list of conditions and the following disclaimer in the
  41  *    documentation and/or other materials provided with the distribution.
  42  * 3. All advertising materials mentioning features or use of this software
  43  *    must display the following acknowledgement:
  44  *      This product includes software developed by the University of
  45  *      California, Berkeley and its contributors.
  46  * 4. Neither the name of the University nor the names of its contributors
  47  *    may be used to endorse or promote products derived from this software
  48  *    without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  51  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  52  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  53  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  54  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  55  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  56  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  57  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  58  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  59  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  60  * SUCH DAMAGE.
  61  *
  62  *      @(#)mathimpl.h  8.1 (Berkeley) 6/4/93
  63  */
  64
  65 #include <sys/cdefs.h>
  66 #include <math.h>
  67
  68 #if defined(vax)||defined(tahoe)
  69
  70 /* Deal with different ways to concatenate in cpp */
  71 #  ifdef __STDC__
  72 #    define     cat3(a,b,c) a ## b ## c
  73 #  else
  74 #    define     cat3(a,b,c) a/**/b/**/c
  75 #  endif
  76
  77 /* Deal with vax/tahoe byte order issues */
  78 #  ifdef vax
  79 #    define     cat3t(a,b,c) cat3(a,b,c)
  80 #  else
  81 #    define     cat3t(a,b,c) cat3(a,c,b)
  82 #  endif
  83
  84 #  define vccast(name) (*(const double *)(cat3(name,,x)))
  85
  86    /*
  87     * Define a constant to high precision on a Vax or Tahoe.
  88     *
  89     * Args are the name to define, the decimal floating point value,
  90     * four 16-bit chunks of the float value in hex
  91     * (because the vax and tahoe differ in float format!), the power
  92     * of 2 of the hex-float exponent, and the hex-float mantissa.
  93     * Most of these arguments are not used at compile time; they are
  94     * used in a post-check to make sure the constants were compiled
  95     * correctly.
  96     *
  97     * People who want to use the constant will have to do their own
  98     *     #define foo vccast(foo)
  99     * since CPP cannot do this for them from inside another macro (sigh).
 100     * We define "vccast" if this needs doing.
 101     */
 102 #  define vc(name, value, x1,x2,x3,x4, bexp, xval) \
 103         const static long cat3(name,,x)[] = {cat3t(0x,x1,x2), cat3t(0x,x3,x4)};
 104
 105 #  define ic(name, value, bexp, xval) ;
 106
 107 #else   /* vax or tahoe */
 108
 109    /* Hooray, we have an IEEE machine */
 110 #  undef vccast
 111 #  define vc(name, value, x1,x2,x3,x4, bexp, xval) ;
 112
 113 #  define ic(name, value, bexp, xval) \
 114         const static double name = value;
 115
 116 #endif  /* defined(vax)||defined(tahoe) */
 117
 118
 119 /*
 120  * Functions internal to the math package, yet not static.
 121  */
 122 extern double   __exp__E();
 123 extern double   __log__L();
 124
 125 struct Double {double a, b;};
 126 double __exp__D __P((double, double));
 127 struct Double __log__D __P((double));