Page Menu
Home
c4science
Search
Configure Global Search
Log In
Files
F76867031
Kokkos_Volatile_Load.hpp
No One
Temporary
Actions
Download File
Edit File
Delete File
View Transforms
Subscribe
Mute Notifications
Award Token
Subscribers
None
File Metadata
Details
File Info
Storage
Attached
Created
Sat, Aug 10, 20:53
Size
6 KB
Mime Type
text/x-c++
Expires
Mon, Aug 12, 20:53 (1 d, 22 h)
Engine
blob
Format
Raw Data
Handle
19780146
Attached To
rLAMMPS lammps
Kokkos_Volatile_Load.hpp
View Options
/*
//@HEADER
// ************************************************************************
//
// Kokkos v. 2.0
// Copyright (2014) Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Questions? Contact H. Carter Edwards (hcedwar@sandia.gov)
//
// ************************************************************************
//@HEADER
*/
#if defined( KOKKOS_ATOMIC_HPP ) && ! defined( KOKKOS_VOLATILE_LOAD_HPP )
#define KOKKOS_VOLATILE_LOAD_HPP
#if defined( __GNUC__ ) /* GNU C */ || \
defined( __GNUG__ ) /* GNU C++ */ || \
defined( __clang__ )
#define KOKKOS_IMPL_MAY_ALIAS __attribute__((__may_alias__))
#else
#define KOKKOS_IMPL_MAY_ALIAS
#endif
namespace Kokkos {
//----------------------------------------------------------------------------
template <typename T>
KOKKOS_FORCEINLINE_FUNCTION
T volatile_load(T const volatile * const src_ptr)
{
typedef uint64_t KOKKOS_IMPL_MAY_ALIAS T64;
typedef uint32_t KOKKOS_IMPL_MAY_ALIAS T32;
typedef uint16_t KOKKOS_IMPL_MAY_ALIAS T16;
typedef uint8_t KOKKOS_IMPL_MAY_ALIAS T8;
enum {
NUM_8 = sizeof(T),
NUM_16 = NUM_8 / 2,
NUM_32 = NUM_8 / 4,
NUM_64 = NUM_8 / 8
};
union {
T const volatile * const ptr;
T64 const volatile * const ptr64;
T32 const volatile * const ptr32;
T16 const volatile * const ptr16;
T8 const volatile * const ptr8;
} src = {src_ptr};
T result;
union {
T * const ptr;
T64 * const ptr64;
T32 * const ptr32;
T16 * const ptr16;
T8 * const ptr8;
} dst = {&result};
for (int i=0; i < NUM_64; ++i) {
dst.ptr64[i] = src.ptr64[i];
}
if ( NUM_64*2 < NUM_32 ) {
dst.ptr32[NUM_64*2] = src.ptr32[NUM_64*2];
}
if ( NUM_32*2 < NUM_16 ) {
dst.ptr16[NUM_32*2] = src.ptr16[NUM_32*2];
}
if ( NUM_16*2 < NUM_8 ) {
dst.ptr8[NUM_16*2] = src.ptr8[NUM_16*2];
}
return result;
}
template <typename T>
KOKKOS_FORCEINLINE_FUNCTION
void volatile_store(T volatile * const dst_ptr, T const volatile * const src_ptr)
{
typedef uint64_t KOKKOS_IMPL_MAY_ALIAS T64;
typedef uint32_t KOKKOS_IMPL_MAY_ALIAS T32;
typedef uint16_t KOKKOS_IMPL_MAY_ALIAS T16;
typedef uint8_t KOKKOS_IMPL_MAY_ALIAS T8;
enum {
NUM_8 = sizeof(T),
NUM_16 = NUM_8 / 2,
NUM_32 = NUM_8 / 4,
NUM_64 = NUM_8 / 8
};
union {
T const volatile * const ptr;
T64 const volatile * const ptr64;
T32 const volatile * const ptr32;
T16 const volatile * const ptr16;
T8 const volatile * const ptr8;
} src = {src_ptr};
union {
T volatile * const ptr;
T64 volatile * const ptr64;
T32 volatile * const ptr32;
T16 volatile * const ptr16;
T8 volatile * const ptr8;
} dst = {dst_ptr};
for (int i=0; i < NUM_64; ++i) {
dst.ptr64[i] = src.ptr64[i];
}
if ( NUM_64*2 < NUM_32 ) {
dst.ptr32[NUM_64*2] = src.ptr32[NUM_64*2];
}
if ( NUM_32*2 < NUM_16 ) {
dst.ptr16[NUM_32*2] = src.ptr16[NUM_32*2];
}
if ( NUM_16*2 < NUM_8 ) {
dst.ptr8[NUM_16*2] = src.ptr8[NUM_16*2];
}
}
template <typename T>
KOKKOS_FORCEINLINE_FUNCTION
void volatile_store(T volatile * const dst_ptr, T const * const src_ptr)
{
typedef uint64_t KOKKOS_IMPL_MAY_ALIAS T64;
typedef uint32_t KOKKOS_IMPL_MAY_ALIAS T32;
typedef uint16_t KOKKOS_IMPL_MAY_ALIAS T16;
typedef uint8_t KOKKOS_IMPL_MAY_ALIAS T8;
enum {
NUM_8 = sizeof(T),
NUM_16 = NUM_8 / 2,
NUM_32 = NUM_8 / 4,
NUM_64 = NUM_8 / 8
};
union {
T const * const ptr;
T64 const * const ptr64;
T32 const * const ptr32;
T16 const * const ptr16;
T8 const * const ptr8;
} src = {src_ptr};
union {
T volatile * const ptr;
T64 volatile * const ptr64;
T32 volatile * const ptr32;
T16 volatile * const ptr16;
T8 volatile * const ptr8;
} dst = {dst_ptr};
for (int i=0; i < NUM_64; ++i) {
dst.ptr64[i] = src.ptr64[i];
}
if ( NUM_64*2 < NUM_32 ) {
dst.ptr32[NUM_64*2] = src.ptr32[NUM_64*2];
}
if ( NUM_32*2 < NUM_16 ) {
dst.ptr16[NUM_32*2] = src.ptr16[NUM_32*2];
}
if ( NUM_16*2 < NUM_8 ) {
dst.ptr8[NUM_16*2] = src.ptr8[NUM_16*2];
}
}
template <typename T>
KOKKOS_FORCEINLINE_FUNCTION
void volatile_store(T volatile * dst_ptr, T const volatile & src)
{ volatile_store(dst_ptr, &src); }
template <typename T>
KOKKOS_FORCEINLINE_FUNCTION
void volatile_store(T volatile * dst_ptr, T const & src)
{ volatile_store(dst_ptr, &src); }
template <typename T>
KOKKOS_FORCEINLINE_FUNCTION
T safe_load(T const * const ptr)
{
#if !defined( __MIC__ )
return *ptr;
#else
return volatile_load(ptr);
#endif
}
} // namespace kokkos
#undef KOKKOS_IMPL_MAY_ALIAS
#endif
Event Timeline
Log In to Comment