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authorUlrich Drepper <drepper@redhat.com>1999-07-14 00:54:57 +0000
committerUlrich Drepper <drepper@redhat.com>1999-07-14 00:54:57 +0000
commitabfbdde177c3a7155070dda1b2cdc8292054cc26 (patch)
treee021306b596381fbf8311d2b7eb294e918ff17c8 /sysdeps/libm-ieee754/s_cbrtl.c
parent86421aa57ecfd70963ae66848bd6a6dd3b8e0fe6 (diff)
Update.
Diffstat (limited to 'sysdeps/libm-ieee754/s_cbrtl.c')
-rw-r--r--sysdeps/libm-ieee754/s_cbrtl.c78
1 files changed, 0 insertions, 78 deletions
diff --git a/sysdeps/libm-ieee754/s_cbrtl.c b/sysdeps/libm-ieee754/s_cbrtl.c
deleted file mode 100644
index 1d021b7c3c..0000000000
--- a/sysdeps/libm-ieee754/s_cbrtl.c
+++ /dev/null
@@ -1,78 +0,0 @@
-/* Compute cubic root of double value.
- Copyright (C) 1997 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Dirk Alboth <dirka@uni-paderborn.de> and
- Ulrich Drepper <drepper@cygnus.com>, 1997.
-
- 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. */
-
-#include "math.h"
-#include "math_private.h"
-
-
-#define CBRT2 1.2599210498948731648 /* 2^(1/3) */
-#define SQR_CBRT2 1.5874010519681994748 /* 2^(2/3) */
-
-/* We don't use long double values here since U need not be computed
- with full precision. */
-static const double factor[5] =
-{
- 1.0 / SQR_CBRT2,
- 1.0 / CBRT2,
- 1.0,
- CBRT2,
- SQR_CBRT2
-};
-
-
-long double
-__cbrtl (long double x)
-{
- long double xm, ym, u, t2;
- int xe;
-
- /* Reduce X. XM now is an range 1.0 to 0.5. */
- xm = __frexpl (fabs (x), &xe);
-
- /* If X is not finite or is null return it (with raising exceptions
- if necessary.
- Note: *Our* version of `frexp' sets XE to zero if the argument is
- Inf or NaN. This is not portable but faster. */
- if (xe == 0 && fpclassify (x) <= FP_ZERO)
- return x + x;
-
- u = (0.338058687610520237
- + (1.67595307700780102
- + (-2.82414939754975962
- + (4.09559907378707839 +
- (-4.11151425200350531
- + (2.65298938441952296 +
- (-0.988553671195413709
- + 0.161617097923756032 * xm)
- * xm)
- * xm)
- * xm)
- * xm)
- * xm)
- *xm);
-
- t2 = u * u * u;
-
- ym = u * (t2 + 2.0 * xm) / (2.0 * t2 + xm) * factor[2 + xe % 3];
-
- return __ldexpl (x > 0.0 ? ym : -ym, xe / 3);
-}
-weak_alias (__cbrtl, cbrtl)