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author | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
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committer | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
commit | 5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 (patch) | |
tree | 4470480d904b65cf14ca524f96f79eca818c3eaf /sysdeps/ieee754/ldbl-96/s_cbrtl.c | |
parent | 199fc19d3aaaf57944ef036e15904febe877fc93 (diff) | |
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Prepare for radical source tree reorganization.zack/build-layout-experiment
All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).
Diffstat (limited to 'sysdeps/ieee754/ldbl-96/s_cbrtl.c')
-rw-r--r-- | sysdeps/ieee754/ldbl-96/s_cbrtl.c | 70 |
1 files changed, 0 insertions, 70 deletions
diff --git a/sysdeps/ieee754/ldbl-96/s_cbrtl.c b/sysdeps/ieee754/ldbl-96/s_cbrtl.c deleted file mode 100644 index 5712fce2e9..0000000000 --- a/sysdeps/ieee754/ldbl-96/s_cbrtl.c +++ /dev/null @@ -1,70 +0,0 @@ -/* Compute cubic root of double value. - Copyright (C) 1997-2017 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 Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -#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 -}; - -static const long double third = 0.3333333333333333333333333L; - -long double -__cbrtl (long double x) -{ - long double xm, u; - int xe; - - /* Reduce X. XM now is an range 1.0 to 0.5. */ - xm = __frexpl (fabsl (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 = (((-1.34661104733595206551E-1 * xm - + 5.46646013663955245034E-1) * xm - - 9.54382247715094465250E-1) * xm - + 1.13999833547172932737E0) * xm - + 4.02389795645447521269E-1; - - u *= factor[2 + xe % 3]; - u = __ldexpl (x > 0.0 ? u : -u, xe / 3); - - u -= (u - (x / (u * u))) * third; - u -= (u - (x / (u * u))) * third; - return u; -} -weak_alias (__cbrtl, cbrtl) |