glibc/sysdeps/m68k/fpu/e_pow.c
Ulrich Drepper 51702635af Update.
* locale/categories.def: Change type of _NL_CTYPE_CLASS_NAMES and
	_NL_CTYPE_MAP_NAMES field to stringlist.
	Change name of _NL_CTYPE_CODESET_NAME to "charmap".
	* locale/localeinfo.h (enum value_type): Add stringlist.
	* locale/programs/locale.c (show_info): Handle stringlist.

	* locale/programs/charmap.c (charmap_read): If charmap file is not
	using the given name try to find it by looking through all available
	charmap files and compare the code set name.
	* locale/programs/locale.c (write_charmaps): Also print names of
	charset in <code_set_name> fields in the files.

	* elf/ldd.bash.in: Correct translatable strings.

	* posix/TESTS: Add some more tests for character class matching.
	* posix/regex.c: Merge with GNU awk version.
	(regex_compile): Use ISO C/amend 1 functions for character class
	handling.
	* posix/regex.h: Merge with GNU awk version.

	* posix/getopt.c: Declare as master copies.
	* posix/getopt1.c: Likewise.
	* posix/getopt.h: Likewise.

	* sysdeps/unix/sysv/linux/sys/mount.h: Add definitions for option
	value to mount functions.
	Patch by a sun <asun@zoology.washington.edu>.

	* stdio-common/bug4.c (main): Use /tmp/bug4.test for concurrency
	with other tests.
	* sunrpc/svc_run.c (svc_exit): New, defined.
	(svc_run): Test for svc_stop variable.
	* sysdeps/m68k/s_cexp.c: Rewritten.
	* sysdeps/m68k/s_cexpf.c: Likewise.
	* sysdeps/m68k/s_cexpl.c: Likewise.
1997-05-07 15:31:21 +00:00

125 lines
3.0 KiB
C

/* Copyright (C) 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#define __LIBC_M81_MATH_INLINES
#include <math.h>
#include "math_private.h"
#ifndef SUFF
#define SUFF
#endif
#ifndef float_type
#define float_type double
#endif
#define CONCATX(a,b) __CONCAT(a,b)
#define s(name) CONCATX(name,SUFF)
#define m81(func) __m81_u(s(func))
float_type
s(__ieee754_pow) (float_type x, float_type y)
{
float_type z;
float_type ax;
unsigned long x_cond, y_cond;
y_cond = __m81_test (y);
if (y_cond & __M81_COND_ZERO)
return 1.0;
x_cond = __m81_test (x);
if ((x_cond | y_cond) & __M81_COND_NAN)
return x + y;
if (y_cond & __M81_COND_INF)
{
ax = s(fabs) (x);
if (ax == 1)
return y - y;
if (ax > 1)
return y_cond & __M81_COND_NEG ? 0 : y;
else
return y_cond & __M81_COND_NEG ? -y : 0;
}
if (s(fabs) (y) == 1)
return y_cond & __M81_COND_NEG ? 1 / x : x;
if (y == 2)
return x * x;
if (y == 0.5 && !(x_cond & __M81_COND_NEG))
return m81(__ieee754_sqrt) (x);
if (x == 10.0)
{
__asm ("ftentox%.x %1, %0" : "=f" (z) : "f" (y));
return z;
}
if (x == 2.0)
{
__asm ("ftwotox%.x %1, %0" : "=f" (z) : "f" (y));
return z;
}
ax = s(fabs) (x);
if (x_cond & (__M81_COND_INF | __M81_COND_ZERO) || ax == 1)
{
z = ax;
if (y_cond & __M81_COND_NEG)
z = 1 / z;
if (x_cond & __M81_COND_NEG)
{
if (y != m81(__rint) (y))
{
if (x == -1)
z = (z - z) / (z - z);
}
else
goto maybe_negate;
}
return z;
}
if (x_cond & __M81_COND_NEG)
{
if (y == m81(__rint) (y))
{
z = m81(__ieee754_exp) (y * m81(__ieee754_log) (-x));
maybe_negate:
/* We always use the long double format, since y is already in
this format and rounding won't change the result. */
{
int32_t exponent;
u_int32_t i0, i1;
GET_LDOUBLE_WORDS (exponent, i0, i1, y);
exponent = (exponent & 0x7fff) - 0x3fff;
if (exponent <= 31
? i0 & (1 << (31 - exponent))
: (exponent <= 63
&& i1 & (1 << (63 - exponent))))
z = -z;
}
}
else
z = (y - y) / (y - y);
}
else
z = m81(__ieee754_exp) (y * m81(__ieee754_log) (x));
return z;
}