mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-29 14:01:20 +00:00
2b778ceb40
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 6694 files FOO. I then removed trailing white space from benchtests/bench-pthread-locks.c and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this diagnostic from Savannah: remote: *** pre-commit check failed ... remote: *** error: lines with trailing whitespace found remote: error: hook declined to update refs/heads/master
54 lines
1.6 KiB
C
54 lines
1.6 KiB
C
/* mpn_sub_n -- Subtract two limb vectors of equal, non-zero length.
|
|
|
|
Copyright (C) 1992-2021 Free Software Foundation, Inc.
|
|
|
|
This file is part of the GNU MP Library.
|
|
|
|
The GNU MP 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 MP 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 MP Library; see the file COPYING.LIB. If not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <gmp.h>
|
|
#include "gmp-impl.h"
|
|
|
|
mp_limb_t
|
|
mpn_sub_n (mp_ptr res_ptr, mp_srcptr s1_ptr, mp_srcptr s2_ptr, mp_size_t size)
|
|
{
|
|
register mp_limb_t x, y, cy;
|
|
register mp_size_t j;
|
|
|
|
/* The loop counter and index J goes from -SIZE to -1. This way
|
|
the loop becomes faster. */
|
|
j = -size;
|
|
|
|
/* Offset the base pointers to compensate for the negative indices. */
|
|
s1_ptr -= j;
|
|
s2_ptr -= j;
|
|
res_ptr -= j;
|
|
|
|
cy = 0;
|
|
do
|
|
{
|
|
y = s2_ptr[j];
|
|
x = s1_ptr[j];
|
|
y += cy; /* add previous carry to subtrahend */
|
|
cy = (y < cy); /* get out carry from that addition */
|
|
y = x - y; /* main subtract */
|
|
cy = (y > x) + cy; /* get out carry from the subtract, combine */
|
|
res_ptr[j] = y;
|
|
}
|
|
while (++j != 0);
|
|
|
|
return cy;
|
|
}
|