92 lines
3.1 KiB
C++
92 lines
3.1 KiB
C++
/* Copyright (C) 2009-2013 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 "config.h"
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#include "libitm_i.h"
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#include "dispatch.h"
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extern "C" {
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#ifndef HAVE_AS_AVX
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// If we don't have an AVX capable assembler, we didn't set -mavx on the
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// command-line either, which means that libitm.h defined neither this type
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// nor the functions in this file. Define the type and unconditionally
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// wrap the file in extern "C" to make up for the lack of pre-declaration.
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typedef float _ITM_TYPE_M256 __attribute__((vector_size(32), may_alias));
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#endif
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// Re-define the memcpy implementations so that we can frob the
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// interface to deal with possibly missing AVX instruction set support.
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#ifdef HAVE_AS_AVX
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#define RETURN(X) return X
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#define STORE(X,Y) X = Y
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#define OUTPUT(T) _ITM_TYPE_##T
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#define INPUT(T,X) , _ITM_TYPE_##T X
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#else
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/* Emit vmovaps (%rax),%ymm0. */
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#define RETURN(X) \
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asm volatile(".byte 0xc5,0xfc,0x28,0x00" : "=m"(X) : "a"(&X))
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/* Emit vmovaps %ymm0,(%rax); vzeroupper. */
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#define STORE(X,Y) \
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asm volatile(".byte 0xc5,0xfc,0x29,0x00,0xc5,0xf8,0x77" : "=m"(X) : "a"(&X))
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#define OUTPUT(T) void
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#define INPUT(T,X)
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#endif
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#undef ITM_READ_MEMCPY
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#define ITM_READ_MEMCPY(T, LSMOD, TARGET, M2) \
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OUTPUT(T) ITM_REGPARM _ITM_##LSMOD##T (const _ITM_TYPE_##T *ptr) \
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{ \
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_ITM_TYPE_##T v; \
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TARGET memtransfer##M2(&v, ptr, sizeof(_ITM_TYPE_##T), false, \
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GTM::abi_dispatch::NONTXNAL, \
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GTM::abi_dispatch::LSMOD); \
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RETURN(v); \
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}
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#undef ITM_WRITE_MEMCPY
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#define ITM_WRITE_MEMCPY(T, LSMOD, TARGET, M2) \
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void ITM_REGPARM _ITM_##LSMOD##T (_ITM_TYPE_##T *ptr INPUT(T,in)) \
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{ \
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_ITM_TYPE_##T v; \
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STORE(v, in); \
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TARGET memtransfer##M2(ptr, &v, sizeof(_ITM_TYPE_##T), false, \
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GTM::abi_dispatch::LSMOD, \
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GTM::abi_dispatch::NONTXNAL); \
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}
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// ??? Use memcpy for now, until we have figured out how to best instantiate
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// these loads/stores.
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CREATE_DISPATCH_FUNCTIONS_T_MEMCPY(M256, GTM::abi_disp()->, )
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void ITM_REGPARM
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_ITM_LM256 (const _ITM_TYPE_M256 *ptr)
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{
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GTM::GTM_LB (ptr, sizeof (*ptr));
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}
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} // extern "C"
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