/* mpihelp-mul_3.c  -  MPI helper functions
 * Copyright (C) 1994, 1996, 1997, 1998, 2001 Free Software Foundation, Inc.
 *
 * This file is part of GnuPG.
 *
 * GnuPG is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * GnuPG 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
 *
 * Note: This code is heavily based on the GNU MP Library.
 *	 Actually it's the same code with only minor changes in the
 *	 way the data is stored; this is to support the abstraction
 *	 of an optional secure memory allocation which may be used
 *	 to avoid revealing of sensitive data due to paging etc.
 *	 The GNU MP Library itself is published under the LGPL;
 *	 however I decided to publish this code under the plain GPL.
 */

#include "mpi-internal.h"
#include "longlong.h"

mpi_limb_t
mpihelp_submul_1(mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
		 mpi_size_t s1_size, mpi_limb_t s2_limb)
{
	mpi_limb_t cy_limb;
	mpi_size_t j;
	mpi_limb_t prod_high, prod_low;
	mpi_limb_t x;

	/* The loop counter and index J goes from -SIZE to -1.  This way
	 * the loop becomes faster.  */
	j = -s1_size;
	res_ptr -= j;
	s1_ptr -= j;

	cy_limb = 0;
	do {
		umul_ppmm(prod_high, prod_low, s1_ptr[j], s2_limb);

		prod_low += cy_limb;
		cy_limb = (prod_low < cy_limb ? 1 : 0) + prod_high;

		x = res_ptr[j];
		prod_low = x - prod_low;
		cy_limb += prod_low > x ? 1 : 0;
		res_ptr[j] = prod_low;
	} while (++j);

	return cy_limb;
}
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&amp;id=4d1ceea8516cd6adf21f6b75995e2a7d4f376f9b'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/include?h=nds-private-remove&amp;id=4d1ceea8516cd6adf21f6b75995e2a7d4f376f9b'>include</a>/<a href='/cgit.cgi/linux/net-next.git/log/include/sound?h=nds-private-remove&amp;id=4d1ceea8516cd6adf21f6b75995e2a7d4f376f9b'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/log/include/sound/asequencer.h?h=nds-private-remove&amp;id=4d1ceea8516cd6adf21f6b75995e2a7d4f376f9b'>asequencer.h</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/include/sound/asequencer.h?h=nds-private-remove&amp;id=4d1ceea8516cd6adf21f6b75995e2a7d4f376f9b&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
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<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-30 13:18:12 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-30 13:18:12 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/soc/tegra/ahb.h?h=nds-private-remove&amp;id=751321b3dd5040dc5be19bd23f985e80c914621a'>751321b3dd5040dc5be19bd23f985e80c914621a</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/soc/tegra/ahb.h?id=751321b3dd5040dc5be19bd23f985e80c914621a'>patch</a>)</td></tr>
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<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/soc/tegra/ahb.h?h=nds-private-remove&amp;id=566cf877a1fcb6d6dc0126b076aad062054c2637'>566cf877a1fcb6d6dc0126b076aad062054c2637</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/soc/tegra/ahb.h?h=nds-private-remove&amp;id=751321b3dd5040dc5be19bd23f985e80c914621a&amp;id2=566cf877a1fcb6d6dc0126b076aad062054c2637'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/soc/tegra/ahb.h?h=nds-private-remove&amp;id=586655d278ba08af7b198b93217746f9a506ee8a'>586655d278ba08af7b198b93217746f9a506ee8a</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/soc/tegra/ahb.h?h=nds-private-remove&amp;id=751321b3dd5040dc5be19bd23f985e80c914621a&amp;id2=586655d278ba08af7b198b93217746f9a506ee8a'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge tag 'rtc-4.10-2' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux</div><div class='commit-msg'>Pull RTC fix from Alexandre Belloni:
 "A single fix for this cycle. It is worth taking it for 4.10 so that
  distributions will not have CONFIG_RTC_DRV_JZ4740 switching from m to
  y in their config.

  Summary:
   - Allow jz4740 to build as a module again by using kernel_halt()"

* tag 'rtc-4.10-2' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux:
  rtc: jz4740: make the driver buildable as a module again
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=751321b3dd5040dc5be19bd23f985e80c914621a'>Diffstat</a> (limited to 'include/soc/tegra/ahb.h')</div><table summary='diffstat' class='diffstat'>