79 lines
2.3 KiB
C++
79 lines
2.3 KiB
C++
/* Copyright (C) 2008, 2009, 2011 Free Software Foundation, Inc.
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Contributed by Richard Henderson <rth@redhat.com>.
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This file is part of the GNU Transactional Memory Library (libitm).
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Libitm is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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Libitm is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include "libitm_i.h"
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using namespace GTM;
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static void
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do_memset(uintptr_t idst, int c, size_t size, abi_dispatch::lock_type W)
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{
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abi_dispatch *disp = abi_disp();
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uintptr_t dofs = idst & (CACHELINE_SIZE - 1);
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abi_dispatch::mask_pair dpair;
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gtm_cacheline *dst
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= reinterpret_cast<gtm_cacheline *>(idst & -CACHELINE_SIZE);
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if (size == 0)
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return;
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if (dofs != 0)
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{
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size_t dleft = CACHELINE_SIZE - dofs;
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size_t min = (size <= dleft ? size : dleft);
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dpair = disp->write_lock(dst, W);
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*dpair.mask |= (((gtm_cacheline_mask)1 << min) - 1) << dofs;
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memset (&dpair.line->b[dofs], c, min);
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dst++;
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size -= min;
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}
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while (size >= CACHELINE_SIZE)
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{
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dpair = disp->write_lock(dst, W);
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*dpair.mask = -1;
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memset (dpair.line, c, CACHELINE_SIZE);
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dst++;
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size -= CACHELINE_SIZE;
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}
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if (size != 0)
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{
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dpair = disp->write_lock(dst, W);
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*dpair.mask |= ((gtm_cacheline_mask)1 << size) - 1;
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memset (dpair.line, c, size);
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}
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}
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#define ITM_MEM_DEF(WRITE) \
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void ITM_REGPARM _ITM_memset##WRITE(void *dst, int c, size_t size) \
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{ \
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do_memset ((uintptr_t)dst, c, size, abi_dispatch::WRITE); \
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}
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ITM_MEM_DEF(W)
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ITM_MEM_DEF(WaR)
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ITM_MEM_DEF(WaW)
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