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https://github.com/amd/blis.git
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83316485ce
Details:
- Fixed a race condition in self-initialization whereby the bli_is_init
static variable could be erroneously read as TRUE by thread 1 while
thread 0 is still executing bli_init_apis(), thus allowing thread 1 to
use the library before it is actually ready. Thanks to to Minh Quan Ho
and Devin Matthews for pointing out this issue.
- Part of the solution to the aforementioned race condition was involved
replacing the runtime initialization of the global scalar constants
(e.g., BLIS_ONE, BLIS_ZERO, etc.) in bli_const.c with a static
initialization of those same constants. This eliminates the need for
bli_const_init() altogether. (The static initialization is made concise
via preprocess macros.)
- Defined bli_gks_query_cntx_noinit(), which behaves just like
bli_gks_query_cntx(), except that it does not call bli_init_once(). This
function is called in lieu of bli_gks_query_cntx() in bli_ind_init() and
bli_memsys_init() so as to not result in any recursion into
bli_init_once().
- Removed BLIS_ONE_HALF, BLIS_MINUS_ONE_HALF global scalar constants.
They have no use in BLIS or its test products, and we have little reason
to believe they are used by others.
- Removed testsuite/out file, which was accidentally committed as part
of 70640a3.
83 lines
3.3 KiB
C
83 lines
3.3 KiB
C
/*
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BLIS
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An object-based framework for developing high-performance BLAS-like
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libraries.
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Copyright (C) 2014, The University of Texas at Austin
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of The University of Texas at Austin nor the names
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of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "blis.h"
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// Statically initialize structs containing representations of various
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// constants for each datatype supported in BLIS.
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static constdata_t bli_two_buffer = bli_obj_init_constdata( 2.0 );
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static constdata_t bli_one_buffer = bli_obj_init_constdata( 1.0 );
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static constdata_t bli_zero_buffer = bli_obj_init_constdata( 0.0 );
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static constdata_t bli_mone_buffer = bli_obj_init_constdata( -1.0 );
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static constdata_t bli_mtwo_buffer = bli_obj_init_constdata( -2.0 );
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// Statically initialize global scalar constants, attaching the addresses
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// of the corresponding structs above.
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obj_t BLIS_TWO = bli_obj_init_const( &bli_two_buffer );
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obj_t BLIS_ONE = bli_obj_init_const( &bli_one_buffer );
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obj_t BLIS_ZERO = bli_obj_init_const( &bli_zero_buffer );
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obj_t BLIS_MINUS_ONE = bli_obj_init_const( &bli_mone_buffer );
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obj_t BLIS_MINUS_TWO = bli_obj_init_const( &bli_mtwo_buffer );
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#if 0
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obj_t BLIS_TWO = {};
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obj_t BLIS_ONE = {};
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obj_t BLIS_ZERO = {};
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obj_t BLIS_MINUS_ONE = {};
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obj_t BLIS_MINUS_TWO = {};
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void bli_const_init( void )
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{
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bli_obj_create_const( 2.0, &BLIS_TWO );
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bli_obj_create_const( 1.0, &BLIS_ONE );
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bli_obj_create_const( 0.5, &BLIS_ONE_HALF );
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bli_obj_create_const( 0.0, &BLIS_ZERO );
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bli_obj_create_const( -0.5, &BLIS_MINUS_ONE_HALF );
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bli_obj_create_const( -1.0, &BLIS_MINUS_ONE );
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bli_obj_create_const( -2.0, &BLIS_MINUS_TWO );
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}
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void bli_const_finalize( void )
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{
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bli_obj_free( &BLIS_TWO );
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bli_obj_free( &BLIS_ONE );
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bli_obj_free( &BLIS_ONE_HALF );
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bli_obj_free( &BLIS_ZERO );
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bli_obj_free( &BLIS_MINUS_ONE_HALF );
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bli_obj_free( &BLIS_MINUS_ONE );
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bli_obj_free( &BLIS_MINUS_TWO );
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}
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#endif
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