codelet_zttqrt.c 5.43 KB
Newer Older
1 2
/**
 *
3 4
 * @copyright (c) 2009-2014 The University of Tennessee and The University
 *                          of Tennessee Research Foundation.
5 6
 *                          All rights reserved.
 * @copyright (c) 2012-2014 Inria. All rights reserved.
7
 * @copyright (c) 2012-2014 Bordeaux INP, CNRS (LaBRI UMR 5800), Inria, Univ. Bordeaux. All rights reserved.
8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172
 *
 **/

/**
 *
 * @file codelet_zttqrt.c
 *
 *  MORSE codelets kernel
 *  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 Hatem Ltaief
 * @author Dulceneia Becker
 * @author Mathieu Faverge
 * @author Emmanuel Agullo
 * @author Cedric Castagnede
 * @date 2010-11-15
 * @precisions normal z -> c d s
 *
 **/
#include <lapacke.h>
#include "morse_starpu.h"
#include "codelet_z.h"

/**
 *
 * @ingroup CORE_MORSE_Complex64_t
 *
 *  CORE_zttqrt computes a QR factorization of a rectangular matrix
 *  formed by coupling a complex N-by-N upper triangular tile A1
 *  on top of a complex M-by-N upper trapezoidal tile A2:
 *
 *    | A1 | = Q * R
 *    | A2 |
 *
 *  The tile Q is represented as a product of elementary reflectors
 *
 *    Q = H(1) H(2) . . . H(k), where k = min(M,N).
 *
 *  Each H(i) has the form
 *
 *    H(i) = I - tau * v * v'
 *
 *  where tau is a complex scalar, and v is a complex vector with
 *  v(1:i-1) = 0 and v(i) = 1; v(i+1:m) is stored on exit in A2(1:m,i),
 *  and tau in TAU(i).
 *
 *******************************************************************************
 *
 * @param[in] M
 *         The number of rows of the tile A2.  M >= 0.
 *
 * @param[in] N
 *         The number of columns of the tile A1 and A2.  N >= 0.
 *
 * @param[in] IB
 *         The inner-blocking size.  IB >= 0.
 *
 * @param[in,out] A1
 *         On entry, the N-by-N tile A1.
 *         On exit, the elements on and above the diagonal of the array
 *         contain the N-by-N upper trapezoidal tile R;
 *         the elements below the diagonal are not referenced.
 *
 * @param[in] LDA1
 *         The leading dimension of the array A1.  LDA1 >= max(1,N).
 *
 * @param[in,out] A2
 *         On entry, the M-by-N upper triangular tile A2.
 *         On exit, the elements on and above the diagonal of the array
 *         with the array TAU, represent
 *         the unitary tile Q as a product of elementary reflectors
 *         (see Further Details).
 *
 * @param[in] LDA2
 *         The leading dimension of the array A2.  LDA2 >= max(1,M).
 *
 * @param[out] T
 *         The IB-by-N triangular factor T of the block reflector.
 *         T is upper triangular by block (economic storage);
 *         The rest of the array is not referenced.
 *
 * @param[in] LDT
 *         The leading dimension of the array T. LDT >= IB.
 *
 * @param[out] TAU
 *         The scalar factors of the elementary reflectors (see Further
 *         Details).
 *
 * @param[in,out] WORK
 *
 *******************************************************************************
 *
 * @return
 *          \retval MORSE_SUCCESS successful exit
 *          \retval <0 if -i, the i-th argument had an illegal value
 *
 ******************************************************************************/

void MORSE_TASK_zttqrt(MORSE_option_t *options,
                       int m, int n, int ib, int nb,
                       MORSE_desc_t *A1, int A1m, int A1n, int lda1,
                       MORSE_desc_t *A2, int A2m, int A2n, int lda2,
                       MORSE_desc_t *T, int Tm, int Tn, int ldt)
{
    (void)nb;
    struct starpu_codelet *codelet = &cl_zttqrt;
    void (*callback)(void*) = options->profiling ? cl_zttqrt_callback : NULL;

    if ( morse_desc_islocal( A1, A1m, A1n ) ||
         morse_desc_islocal( A2, A2m, A2n ) ||
         morse_desc_islocal( T,  Tm,  Tn  ) )
    {
        starpu_insert_task(
            codelet,
            STARPU_VALUE,    &m,                 sizeof(int),
            STARPU_VALUE,    &n,                 sizeof(int),
            STARPU_VALUE,    &ib,                sizeof(int),
            STARPU_RW,        RTBLKADDR(A1, MORSE_Complex64_t, A1m, A1n),
            STARPU_VALUE,    &lda1,              sizeof(int),
            STARPU_RW,        RTBLKADDR(A2, MORSE_Complex64_t, A2m, A2n),
            STARPU_VALUE,    &lda2,              sizeof(int),
            STARPU_W,         RTBLKADDR(T, MORSE_Complex64_t, Tm, Tn),
            STARPU_VALUE,    &ldt,               sizeof(int),
             /* nb * (ib+1) */
            STARPU_SCRATCH,   options->ws_worker,
            STARPU_PRIORITY,  options->priority,
            STARPU_CALLBACK,  callback,
            0);
    }
}


static void cl_zttqrt_cpu_func(void *descr[], void *cl_arg)
{
    int m;
    int n;
    int ib;
    MORSE_Complex64_t *A1;
    int lda1;
    MORSE_Complex64_t *A2;
    int lda2;
    MORSE_Complex64_t *T;
    int ldt;
    MORSE_Complex64_t *TAU;
    MORSE_Complex64_t *WORK;

    A1  = (MORSE_Complex64_t *)STARPU_MATRIX_GET_PTR(descr[0]);
    A2  = (MORSE_Complex64_t *)STARPU_MATRIX_GET_PTR(descr[1]);
    T   = (MORSE_Complex64_t *)STARPU_MATRIX_GET_PTR(descr[2]);
    TAU = (MORSE_Complex64_t *)STARPU_MATRIX_GET_PTR(descr[3]); /* nb * (ib+1) */

    starpu_codelet_unpack_args(cl_arg, &m, &n, &ib, &lda1, &lda2, &ldt);

    WORK = TAU + max( m, n );

    CORE_zttqrt(m, n, ib, A1, lda1, A2, lda2, T, ldt, TAU, WORK);
}
/*
 * Codelet definition
 */
CODELETS_CPU(zttqrt, 4, cl_zttqrt_cpu_func)