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/* Copyright (C) 2008, 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"
using namespace GTM;
static void
do_memset(uintptr_t idst, int c, size_t size, abi_dispatch::lock_type W)
{
abi_dispatch *disp = abi_disp();
uintptr_t dofs = idst & (CACHELINE_SIZE - 1);
abi_dispatch::mask_pair dpair;
gtm_cacheline *dst
= reinterpret_cast<gtm_cacheline *>(idst & -CACHELINE_SIZE);
if (size == 0)
return;
if (dofs != 0)
{
size_t dleft = CACHELINE_SIZE - dofs;
size_t min = (size <= dleft ? size : dleft);
dpair = disp->write_lock(dst, W);
*dpair.mask |= (((gtm_cacheline_mask)1 << min) - 1) << dofs;
memset (&dpair.line->b[dofs], c, min);
dst++;
size -= min;
}
while (size >= CACHELINE_SIZE)
{
dpair = disp->write_lock(dst, W);
*dpair.mask = -1;
memset (dpair.line, c, CACHELINE_SIZE);
dst++;
size -= CACHELINE_SIZE;
}
if (size != 0)
{
dpair = disp->write_lock(dst, W);
*dpair.mask |= ((gtm_cacheline_mask)1 << size) - 1;
memset (dpair.line, c, size);
}
}
#define ITM_MEM_DEF(WRITE) \
void ITM_REGPARM _ITM_memset##WRITE(void *dst, int c, size_t size) \
{ \
do_memset ((uintptr_t)dst, c, size, abi_dispatch::WRITE); \
}
ITM_MEM_DEF(W)
ITM_MEM_DEF(WaR)
ITM_MEM_DEF(WaW)
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