sgetri.c

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#include "common.h"

/***************************************************************************/
int PLASMA_sgetri(int N,
                  float *A, int LDA,
                  int *IPIV)
{
    int NB;
    int status;
    plasma_context_t *plasma;
    PLASMA_sequence *sequence = NULL;
    PLASMA_request request = PLASMA_REQUEST_INITIALIZER;
    PLASMA_desc descA;
    PLASMA_desc descW;

    plasma = plasma_context_self();
    if (plasma == NULL) {
        plasma_fatal_error("PLASMA_sgetri", "PLASMA not initialized");
        return PLASMA_ERR_NOT_INITIALIZED;
    }
    /* Check input arguments */
    if (N < 0) {
        plasma_error("PLASMA_sgetri", "illegal value of N");
        return -1;
    }
    if (LDA < max(1, N)) {
        plasma_error("PLASMA_sgetri", "illegal value of LDA");
        return -3;
    }
    /* Quick return */
    if (max(N, 0) == 0)
        return PLASMA_SUCCESS;

    /* Tune NB depending on M, N & NRHS; Set NBNB */
    status = plasma_tune(PLASMA_FUNC_SGESV, N, N, 0);
    if (status != PLASMA_SUCCESS) {
        plasma_error("PLASMA_sgetri", "plasma_tune() failed");
        return status;
    }

    /* Set NT */
    NB   = PLASMA_NB;

    plasma_sequence_create(plasma, &sequence);

    if ( PLASMA_TRANSLATION == PLASMA_OUTOFPLACE ) {
        plasma_sooplap2tile( descA, A, NB, NB, LDA, N, 0, 0, N, N, plasma_desc_mat_free(&(descA)) );
    } else {
        plasma_siplap2tile(  descA, A, NB, NB, LDA, N, 0, 0, N, N);
    }

    /* Allocate workspace */
    PLASMA_Alloc_Workspace_sgetri_Tile_Async(&descA, &descW);

    /* Call the tile interface */
    PLASMA_sgetri_Tile_Async(&descA, IPIV, &descW, sequence, &request);

    if ( PLASMA_TRANSLATION == PLASMA_OUTOFPLACE ) {
        plasma_sooptile2lap( descA, A, NB, NB, LDA, N );
        plasma_dynamic_sync();
        plasma_desc_mat_free(&descA);
    } else {
        plasma_siptile2lap( descA, A, NB, NB, LDA, N );
        plasma_dynamic_sync();
    }
    plasma_desc_mat_free(&(descW));

    status = sequence->status;
    plasma_sequence_destroy(plasma, sequence);
    return status;
}

/***************************************************************************/
int PLASMA_sgetri_Tile(PLASMA_desc *A, int *IPIV)
{
    plasma_context_t *plasma;
    PLASMA_sequence *sequence = NULL;
    PLASMA_request request = PLASMA_REQUEST_INITIALIZER;
    PLASMA_desc descW;
    int status;

    plasma = plasma_context_self();
    if (plasma == NULL) {
        plasma_fatal_error("PLASMA_sgetri_Tile", "PLASMA not initialized");
        return PLASMA_ERR_NOT_INITIALIZED;
    }
    plasma_sequence_create(plasma, &sequence);

    /* Allocate workspace */
    PLASMA_Alloc_Workspace_sgetri_Tile_Async(A, &descW);

    PLASMA_sgetri_Tile_Async(A, IPIV, &descW, sequence, &request);
    plasma_dynamic_sync();
    plasma_desc_mat_free(&(descW));

    status = sequence->status;
    plasma_sequence_destroy(plasma, sequence);
    return status;
}

/***************************************************************************/
int PLASMA_sgetri_Tile_Async(PLASMA_desc *A, int *IPIV, PLASMA_desc *W, 
                             PLASMA_sequence *sequence, PLASMA_request *request)
{
    PLASMA_desc descA = *A;
    PLASMA_desc descW = *W;
    plasma_context_t *plasma;

    plasma = plasma_context_self();
    if (plasma == NULL) {
        plasma_fatal_error("PLASMA_sgetri_Tile_Async", "PLASMA not initialized");
        return PLASMA_ERR_NOT_INITIALIZED;
    }
    if (sequence == NULL) {
        plasma_fatal_error("PLASMA_sgetri_Tile_Async", "NULL sequence");
        return PLASMA_ERR_UNALLOCATED;
    }
    if (request == NULL) {
        plasma_fatal_error("PLASMA_sgetri_Tile_Async", "NULL request");
        return PLASMA_ERR_UNALLOCATED;
    }
    /* Check sequence status */
    if (sequence->status == PLASMA_SUCCESS)
        request->status = PLASMA_SUCCESS;
    else
        return plasma_request_fail(sequence, request, PLASMA_ERR_SEQUENCE_FLUSHED);

    /* Check descriptors for correctness */
    if (plasma_desc_check(&descA) != PLASMA_SUCCESS) {
        plasma_error("PLASMA_sgetri_Tile_Async", "invalid descriptor");
        return plasma_request_fail(sequence, request, PLASMA_ERR_ILLEGAL_VALUE);
    }
    /* Check input arguments */
    if (descA.nb != descA.mb) {
        plasma_error("PLASMA_sgetri_Tile_Async", "only square tiles supported");
        return plasma_request_fail(sequence, request, PLASMA_ERR_ILLEGAL_VALUE);
    }
    /* Quick return */
    if (max(descA.m, 0) == 0)
        return PLASMA_SUCCESS;

    plasma_dynamic_call_5(plasma_pstrtri,
        PLASMA_enum, PlasmaUpper,
        PLASMA_enum, PlasmaNonUnit,
        PLASMA_desc, descA,
        PLASMA_sequence*, sequence,
        PLASMA_request*, request);

    plasma_dynamic_call_9(plasma_pstrsmrv,
        PLASMA_enum, PlasmaRight,
        PLASMA_enum, PlasmaLower,
        PLASMA_enum, PlasmaNoTrans,
        PLASMA_enum, PlasmaUnit,
        float, (float) 1.0,
        PLASMA_desc, descA,
        PLASMA_desc, descW,
        PLASMA_sequence*, sequence,
        PLASMA_request*, request);

    /* No need for barrier tile2row because of previous dependencies */

    /* swap */
    plasma_dynamic_call_5(
        plasma_pslaswpc,
        PLASMA_desc, descA,
        int *,       IPIV,
        int,         -1,
        PLASMA_sequence*, sequence,
        PLASMA_request*,  request);

    plasma_dynamic_call_3(
        plasma_psbarrier_row2tl,
        PLASMA_desc, descA,
        PLASMA_sequence*, sequence,
        PLASMA_request*,  request);

    return PLASMA_SUCCESS;
}

int PLASMA_Alloc_Workspace_sgetri_Tile_Async(PLASMA_desc *A, PLASMA_desc *W)
{
  plasma_sdesc_alloc( *W, A->mb, A->nb, A->m, A->nb, 0, 0, A->m, A->nb, 
                      plasma_desc_mat_free( W ));
  return PLASMA_SUCCESS;
}