root / testing / matgen / HPL_setran.c
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/*
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* -- High Performance Computing Linpack Benchmark (HPL)
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* HPL - 2.0 - September 10, 2008
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* Antoine P. Petitet
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* University of Tennessee, Knoxville
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* Innovative Computing Laboratory
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* (C) Copyright 2000-2008 All Rights Reserved
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*
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* -- Copyright notice and Licensing terms:
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*
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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
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* are met:
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*
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* 1. 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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*
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* 2. 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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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgement:
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* This product includes software developed at the University of
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* Tennessee, Knoxville, Innovative Computing Laboratory.
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*
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* 4. The name of the University, the name of the Laboratory, or the
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* names of its contributors may not be used to endorse or promote
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* products derived from this software without specific written
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* permission.
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*
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* -- Disclaimer:
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*
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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 UNIVERSITY
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* 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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*/
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/*
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* Include files
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*/
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#include "hpl.h" |
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/*
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* ---------------------------------------------------------------------
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* Static variables
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* ---------------------------------------------------------------------
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*/
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static int ias[2], ics[2], irand[2]; |
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#ifdef STDC_HEADERS
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void HPL_setran
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( |
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const int OPTION, |
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int * IRAN
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) |
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#else
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void HPL_setran
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( OPTION, IRAN ) |
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const int OPTION; |
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int * IRAN;
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#endif
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{
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/*
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* Purpose
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* =======
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*
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* HPL_setran initializes the random generator with the encoding of the
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* first number X(0) in the sequence, and the constants a and c used to
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* compute the next element in the sequence: X(n+1) = a*X(n) + c. X(0),
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* a and c are stored in the static variables irand, ias and ics. When
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* OPTION is 0 (resp. 1 and 2), irand (resp. ia and ic) is set to the
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* values of the input array IRAN. When OPTION is 3, IRAN is set to the
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* current value of irand, and irand is then incremented.
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*
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* Arguments
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* =========
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*
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* OPTION (local input) const int
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* On entry, OPTION is an integer that specifies the operations
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* to be performed on the random generator as specified above.
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*
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* IRAN (local input/output) int *
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* On entry, IRAN is an array of dimension 2, that contains the
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* 16-lower and 15-higher bits of a random number.
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*
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* ---------------------------------------------------------------------
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*/
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/*
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* .. Local Variables ..
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*/
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int j[2]; |
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/* ..
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* .. Executable Statements ..
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*/
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if( OPTION == 3 ) |
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{ /* return current value */
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IRAN[0] = irand[0]; IRAN[1] = irand[1]; |
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HPL_lmul( irand, ias, j ); /* j = irand * ias; */
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HPL_ladd( j, ics, irand ); /* irand = j + ics; */
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} |
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else if( OPTION == 0 ) { irand[0] = IRAN[0]; irand[1] = IRAN[1]; } |
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else if( OPTION == 1 ) { ias [0] = IRAN[0]; ias [1] = IRAN[1]; } |
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else if( OPTION == 2 ) { ics [0] = IRAN[0]; ics [1] = IRAN[1]; } |
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/*
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* End of HPL_setran
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*/
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} |