zpotrs.c 10.6 KB
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/**
 *
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 * @copyright (c) 2009-2014 The University of Tennessee and The University
 *                          of Tennessee Research Foundation.
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 *                          All rights reserved.
 * @copyright (c) 2012-2014 Inria. All rights reserved.
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 * @copyright (c) 2012-2014 Bordeaux INP, CNRS (LaBRI UMR 5800), Inria, Univ. Bordeaux. All rights reserved.
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 *
 **/

/**
 *
 * @file zpotrs.c
 *
 *  MORSE computational routines
 *  MORSE is a software package provided by Univ. of Tennessee,
 *  Univ. of California Berkeley and Univ. of Colorado Denver
 *
 * @version 2.5.0
 * @comment This file has been automatically generated
 *          from Plasma 2.5.0 for MORSE 1.0.0
 * @author Jakub Kurzak
 * @author Mathieu Faverge
 * @author Emmanuel Agullo
 * @author Cedric Castagnede
 * @date 2010-11-15
 * @precisions normal z -> s d c
 *
 **/
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#include "control/common.h"
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/**
 ********************************************************************************
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 *
 * @ingroup MORSE_Complex64_t
 *
 *  MORSE_zpotrs - Solves a system of linear equations A * X = B with a symmetric positive
 *  definite (or Hermitian positive definite in the complex case) matrix A using the Cholesky
 *  factorization A = U**H*U or A = L*L**H computed by MORSE_zpotrf.
 *
 *******************************************************************************
 *
 * @param[in] uplo
 *          = MorseUpper: Upper triangle of A is stored;
 *          = MorseLower: Lower triangle of A is stored.
 *
 * @param[in] N
 *          The order of the matrix A. N >= 0.
 *
 * @param[in] NRHS
 *          The number of right hand sides, i.e., the number of columns of the matrix B. NRHS >= 0.
 *
 * @param[in] A
 *          The triangular factor U or L from the Cholesky factorization A = U**H*U or A = L*L**H,
 *          computed by MORSE_zpotrf.
 *
 * @param[in] LDA
 *          The leading dimension of the array A. LDA >= max(1,N).
 *
 * @param[in,out] B
 *          On entry, the N-by-NRHS right hand side matrix B.
 *          On exit, if return value = 0, the N-by-NRHS solution matrix X.
 *
 * @param[in] LDB
 *          The leading dimension of the array B. LDB >= max(1,N).
 *
 *******************************************************************************
 *
 * @return
 *          \retval MORSE_SUCCESS successful exit
 *          \retval <0 if -i, the i-th argument had an illegal value
 *
 *******************************************************************************
 *
 * @sa MORSE_zpotrs_Tile
 * @sa MORSE_zpotrs_Tile_Async
 * @sa MORSE_cpotrs
 * @sa MORSE_dpotrs
 * @sa MORSE_spotrs
 * @sa MORSE_zpotrf
 *
 ******************************************************************************/
int MORSE_zpotrs(MORSE_enum uplo, int N, int NRHS,
                  MORSE_Complex64_t *A, int LDA,
                  MORSE_Complex64_t *B, int LDB)
{
    int NB;
    int status;
    MORSE_context_t *morse;
    MORSE_sequence_t *sequence = NULL;
    MORSE_request_t request = MORSE_REQUEST_INITIALIZER;
    MORSE_desc_t descA, descB;

    morse = morse_context_self();
    if (morse == NULL) {
        morse_fatal_error("MORSE_zpotrs", "MORSE not initialized");
        return MORSE_ERR_NOT_INITIALIZED;
    }
    /* Check input arguments */
    if (uplo != MorseUpper && uplo != MorseLower) {
        morse_error("MORSE_zpotrs", "illegal value of uplo");
        return -1;
    }
    if (N < 0) {
        morse_error("MORSE_zpotrs", "illegal value of N");
        return -2;
    }
    if (NRHS < 0) {
        morse_error("MORSE_zpotrs", "illegal value of NRHS");
        return -3;
    }
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    if (LDA < chameleon_max(1, N)) {
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        morse_error("MORSE_zpotrs", "illegal value of LDA");
        return -5;
    }
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    if (LDB < chameleon_max(1, N)) {
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        morse_error("MORSE_zpotrs", "illegal value of LDB");
        return -7;
    }
    /* Quick return */
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    if (chameleon_min(N, NRHS) == 0)
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        return MORSE_SUCCESS;

    /* Tune NB depending on M, N & NRHS; Set NBNB */
    status = morse_tune(MORSE_FUNC_ZPOSV, N, N, NRHS);
    if (status != MORSE_SUCCESS) {
        morse_error("MORSE_zpotrs", "morse_tune() failed");
        return status;
    }

    /* Set NT & NTRHS */
    NB    = MORSE_NB;

    morse_sequence_create(morse, &sequence);

/*    if ( MORSE_TRANSLATION == MORSE_OUTOFPLACE ) {*/
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    morse_zlap2tile( morse, &descAl, &descAt, MorseUpperLower,
                     A, NB, NB, LDA, N, N, N, sequence, &request );
    morse_zlap2tile( morse, &descBl, &descBt, MorseUpperLower,
                     B, NB, NB, LDB, NRHS, N, NRHS, sequence, &request );
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/*    } else {*/
/*        morse_ziplap2tile( descA, A, NB, NB, LDA, N,    0, 0, N, N,   */
/*                            sequence, &request);*/
/*        morse_ziplap2tile( descB, B, NB, NB, LDB, NRHS, 0, 0, N, NRHS,*/
/*                            sequence, &request);*/
/*    }*/

    /* Call the tile interface */
    MORSE_zpotrs_Tile_Async(uplo, &descA, &descB, sequence, &request);

/*    if ( MORSE_TRANSLATION == MORSE_OUTOFPLACE ) {*/
        morse_zooptile2lap(descB, B, NB, NB, LDB, NRHS,  sequence, &request);
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        morse_sequence_wait(morse, sequence);
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        morse_desc_mat_free(&descA);
        morse_desc_mat_free(&descB);
/*    } else {*/
/*        morse_ziptile2lap( descA, A, NB, NB, LDA, N,     sequence, &request);*/
/*        morse_ziptile2lap( descB, B, NB, NB, LDB, NRHS,  sequence, &request);*/
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/*        morse_sequence_wait(morse, sequence);*/
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/*    }*/
    
    status = sequence->status;
    morse_sequence_destroy(morse, sequence);
    return status;
}

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/**
 ********************************************************************************
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 *
 * @ingroup MORSE_Complex64_t_Tile
 *
 *  MORSE_zpotrs_Tile - Solves a system of linear equations using previously
 *  computed Cholesky factorization.
 *  Tile equivalent of MORSE_zpotrs().
 *  Operates on matrices stored by tiles.
 *  All matrices are passed through descriptors.
 *  All dimensions are taken from the descriptors.
 *
 *******************************************************************************
 *
 * @param[in] uplo
 *          = MorseUpper: Upper triangle of A is stored;
 *          = MorseLower: Lower triangle of A is stored.
 *
 * @param[in] A
 *          The triangular factor U or L from the Cholesky factorization A = U**H*U or A = L*L**H,
 *          computed by MORSE_zpotrf.
 *
 * @param[in,out] B
 *          On entry, the N-by-NRHS right hand side matrix B.
 *          On exit, if return value = 0, the N-by-NRHS solution matrix X.
 *
 *******************************************************************************
 *
 * @return
 *          \retval MORSE_SUCCESS successful exit
 *
 *******************************************************************************
 *
 * @sa MORSE_zpotrs
 * @sa MORSE_zpotrs_Tile_Async
 * @sa MORSE_cpotrs_Tile
 * @sa MORSE_dpotrs_Tile
 * @sa MORSE_spotrs_Tile
 * @sa MORSE_zpotrf_Tile
 *
 ******************************************************************************/
int MORSE_zpotrs_Tile(MORSE_enum uplo, MORSE_desc_t *A, MORSE_desc_t *B)
{
    MORSE_context_t *morse;
    MORSE_sequence_t *sequence = NULL;
    MORSE_request_t request = MORSE_REQUEST_INITIALIZER;
    int status;

    morse = morse_context_self();
    if (morse == NULL) {
        morse_fatal_error("MORSE_zpotrs_Tile", "MORSE not initialized");
        return MORSE_ERR_NOT_INITIALIZED;
    }
    morse_sequence_create(morse, &sequence);
    MORSE_zpotrs_Tile_Async(uplo, A, B, sequence, &request);
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    RUNTIME_desc_flush( A, sequence );
    RUNTIME_desc_flush( B, sequence );
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    morse_sequence_wait(morse, sequence);
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    status = sequence->status;
    morse_sequence_destroy(morse, sequence);
    return status;
}

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/**
 ********************************************************************************
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 *
 * @ingroup MORSE_Complex64_t_Tile_Async
 *
 *  MORSE_zpotrs_Tile_Async - Solves a system of linear equations using previously
 *  computed Cholesky factorization.
 *  Non-blocking equivalent of MORSE_zpotrs_Tile().
 *  May return before the computation is finished.
 *  Allows for pipelining of operations at runtime.
 *
 *******************************************************************************
 *
 * @param[in] sequence
 *          Identifies the sequence of function calls that this call belongs to
 *          (for completion checks and exception handling purposes).
 *
 * @param[out] request
 *          Identifies this function call (for exception handling purposes).
 *
 *******************************************************************************
 *
 * @sa MORSE_zpotrs
 * @sa MORSE_zpotrs_Tile
 * @sa MORSE_cpotrs_Tile_Async
 * @sa MORSE_dpotrs_Tile_Async
 * @sa MORSE_spotrs_Tile_Async
 * @sa MORSE_zpotrf_Tile_Async
 *
 ******************************************************************************/
int MORSE_zpotrs_Tile_Async(MORSE_enum uplo, MORSE_desc_t *A, MORSE_desc_t *B,
                             MORSE_sequence_t *sequence, MORSE_request_t *request)
{
    MORSE_context_t *morse;

    morse = morse_context_self();
    if (morse == NULL) {
        morse_fatal_error("MORSE_zpotrs_Tile", "MORSE not initialized");
        return MORSE_ERR_NOT_INITIALIZED;
    }
    if (sequence == NULL) {
        morse_fatal_error("MORSE_zpotrs_Tile", "NULL sequence");
        return MORSE_ERR_UNALLOCATED;
    }
    if (request == NULL) {
        morse_fatal_error("MORSE_zpotrs_Tile", "NULL request");
        return MORSE_ERR_UNALLOCATED;
    }
    /* Check sequence status */
    if (sequence->status == MORSE_SUCCESS)
        request->status = MORSE_SUCCESS;
    else
        return morse_request_fail(sequence, request, MORSE_ERR_SEQUENCE_FLUSHED);

    /* Check descriptors for correctness */
    if (morse_desc_check(A) != MORSE_SUCCESS) {
        morse_error("MORSE_zpotrs_Tile", "invalid first descriptor");
        return morse_request_fail(sequence, request, MORSE_ERR_ILLEGAL_VALUE);
    }
    if (morse_desc_check(B) != MORSE_SUCCESS) {
        morse_error("MORSE_zpotrs_Tile", "invalid second descriptor");
        return morse_request_fail(sequence, request, MORSE_ERR_ILLEGAL_VALUE);
    }
    /* Check input arguments */
    if (A->nb != A->mb || B->nb != B->mb) {
        morse_error("MORSE_zpotrs_Tile", "only square tiles supported");
        return morse_request_fail(sequence, request, MORSE_ERR_ILLEGAL_VALUE);
    }
    if (uplo != MorseUpper && uplo != MorseLower) {
        morse_error("MORSE_zpotrs_Tile", "illegal value of uplo");
        return morse_request_fail(sequence, request, -1);
    }
    /* Quick return */
/*
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    if (chameleon_min(N, NRHS) == 0)
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        return MORSE_SUCCESS;
*/
    morse_pztrsm(MorseLeft, uplo, uplo == MorseUpper ? MorseConjTrans : MorseNoTrans, MorseNonUnit, 1.0, A, B, sequence, request);

    morse_pztrsm(MorseLeft, uplo, uplo == MorseUpper ? MorseNoTrans : MorseConjTrans, MorseNonUnit, 1.0, A, B, sequence, request);

    return MORSE_SUCCESS;
}