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/* Copyright (C) 2009, 2011 Free Software Foundation, Inc.
Contributed by Richard Henderson <rth@redhat.com>.
This file is part of the GNU Transactional Memory Library (libitm).
Libitm 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 3 of the License, or
(at your option) any later version.
Libitm 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#include "libitm_i.h"
namespace GTM HIDDEN {
uint32_t const gtm_bit_to_byte_mask[16] =
{
0x00000000,
0x000000ff,
0x0000ff00,
0x0000ffff,
0x00ff0000,
0x00ff00ff,
0x00ffff00,
0x00ffffff,
0xff000000,
0xff0000ff,
0xff00ff00,
0xff00ffff,
0xffff0000,
0xffff00ff,
0xffffff00,
0xffffffff
};
#ifdef __SSE2__
# define MEMBER m128i
#else
# define MEMBER w
#endif
void
gtm_cacheline::copy_mask (gtm_cacheline * __restrict d,
const gtm_cacheline * __restrict s,
gtm_cacheline_mask m)
{
if (m == (gtm_cacheline_mask)-1)
{
*d = *s;
return;
}
if (__builtin_expect (m == 0, 0))
return;
size_t n = sizeof(d->MEMBER[0]);
for (size_t i = 0; i < CACHELINE_SIZE / n; ++i, m >>= n)
store_mask (&d->MEMBER[i], s->MEMBER[i], m);
}
} // namespace GTM
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