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Diffstat (limited to 'sysdeps/generic/mathimpl.h')
| -rw-r--r-- | sysdeps/generic/mathimpl.h | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/sysdeps/generic/mathimpl.h b/sysdeps/generic/mathimpl.h new file mode 100644 index 0000000000..a2c963d288 --- /dev/null +++ b/sysdeps/generic/mathimpl.h @@ -0,0 +1,127 @@ +/* This part here added by roland@prep.ai.mit.edu for the GNU C library. */ + +#include <math.h> /* Done first so we can #undef. */ +#include <endian.h> +#if __BYTE_ORDER == __LITTLE_ENDIAN +#undef national +#define national +#endif + +#undef isinf +#define isinf __isinf +#undef isnan +#define isnan __isnan +#undef infnan +#define infnan __infnan +#undef copysign +#define copysign __copysign +#undef scalb +#define scalb __scalb +#undef drem +#define drem __drem +#undef logb +#define logb __logb +#undef __finite +#undef finite +#define finite __finite +#undef expm1 +#define expm1 __expm1 + +/* + * Copyright (c) 1988, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)mathimpl.h 8.1 (Berkeley) 6/4/93 + */ + +#include <sys/cdefs.h> +#include <math.h> + +#if defined(vax)||defined(tahoe) + +/* Deal with different ways to concatenate in cpp */ +# ifdef __STDC__ +# define cat3(a,b,c) a ## b ## c +# else +# define cat3(a,b,c) a/**/b/**/c +# endif + +/* Deal with vax/tahoe byte order issues */ +# ifdef vax +# define cat3t(a,b,c) cat3(a,b,c) +# else +# define cat3t(a,b,c) cat3(a,c,b) +# endif + +# define vccast(name) (*(const double *)(cat3(name,,x))) + + /* + * Define a constant to high precision on a Vax or Tahoe. + * + * Args are the name to define, the decimal floating point value, + * four 16-bit chunks of the float value in hex + * (because the vax and tahoe differ in float format!), the power + * of 2 of the hex-float exponent, and the hex-float mantissa. + * Most of these arguments are not used at compile time; they are + * used in a post-check to make sure the constants were compiled + * correctly. + * + * People who want to use the constant will have to do their own + * #define foo vccast(foo) + * since CPP cannot do this for them from inside another macro (sigh). + * We define "vccast" if this needs doing. + */ +# define vc(name, value, x1,x2,x3,x4, bexp, xval) \ + const static long cat3(name,,x)[] = {cat3t(0x,x1,x2), cat3t(0x,x3,x4)}; + +# define ic(name, value, bexp, xval) ; + +#else /* vax or tahoe */ + + /* Hooray, we have an IEEE machine */ +# undef vccast +# define vc(name, value, x1,x2,x3,x4, bexp, xval) ; + +# define ic(name, value, bexp, xval) \ + const static double name = value; + +#endif /* defined(vax)||defined(tahoe) */ + + +/* + * Functions internal to the math package, yet not static. + */ +extern double __exp__E(); +extern double __log__L(); + +struct Double {double a, b;}; +double __exp__D __P((double, double)); +struct Double __log__D __P((double)); |