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581c785bf3
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
47 lines
1.7 KiB
C
47 lines
1.7 KiB
C
/* Compute a product of X, X+1, ..., with an error estimate.
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Copyright (C) 2013-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <math.h>
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#include <math_private.h>
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#include <fenv_private.h>
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#include <mul_splitl.h>
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/* Compute the product of X + X_EPS, X + X_EPS + 1, ..., X + X_EPS + N
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- 1, in the form R * (1 + *EPS) where the return value R is an
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approximation to the product and *EPS is set to indicate the
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approximate error in the return value. X is such that all the
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values X + 1, ..., X + N - 1 are exactly representable, and X_EPS /
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X is small enough that factors quadratic in it can be
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neglected. */
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long double
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__gamma_productl (long double x, long double x_eps, int n, long double *eps)
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{
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SET_RESTORE_ROUNDL (FE_TONEAREST);
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long double ret = x;
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*eps = x_eps / x;
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for (int i = 1; i < n; i++)
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{
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*eps += x_eps / (x + i);
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long double lo;
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mul_splitl (&ret, &lo, ret, x + i);
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*eps += lo / ret;
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}
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return ret;
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}
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