rocblas_dspr2 Interface Reference#
hipfort_rocblas::rocblas_dspr2 Interface Reference
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Public Member Functions | |
| integer(kind(rocblas_status_success)) function | rocblas_dspr2_ (handle, uplo, n, alpha, x, incx, y, incy, AP) |
| integer(kind(rocblas_status_success)) function | rocblas_dspr2_rank_0 (handle, uplo, n, alpha, x, incx, y, incy, AP) |
| integer(kind(rocblas_status_success)) function | rocblas_dspr2_rank_1 (handle, uplo, n, alpha, x, incx, y, incy, AP) |
Detailed Description
!
BLAS Level 2 API
\details
xSPR2 performs the matrix-vector operation
A := A + alphaxyT + alphayxT
where alpha is a scalar, x and y are vectors, and A is an
n by n symmetric matrix, supplied in packed form.
@param[in]
handle [rocblas_handle]
handle to the rocblas library context queue.
@param[in]
uplo [rocblas_fill]
specifies whether the upper 'rocblas_fill_upper' or lower 'rocblas_fill_lower'
rocblas_fill_upper: The upper triangular part of A is supplied in AP.
rocblas_fill_lower: The lower triangular part of A is supplied in AP.
@param[in]
n [rocblas_int]
the number of rows and columns of matrix A, must be at least 0.
@param[in]
alpha
device pointer or host pointer to scalar alpha.
@param[in]
x device pointer storing vector x.
@param[in]
incx [rocblas_int]
specifies the increment for the elements of x.
@param[in]
y device pointer storing vector y.
@param[in]
incy [rocblas_int]
specifies the increment for the elements of y.
@param[inout]
AP device pointer storing the packed version of the specified triangular portion of
the symmetric matrix A. Of at least size ((n (n + 1)) 2).
if uplo == rocblas_fill_upper:
The upper triangular portion of the symmetric matrix A is supplied.
The matrix is compacted so that AP contains the triangular portion column-by-column
so that:
AP(0) = A(0,0)
AP(1) = A(0,1)
AP(2) = A(1,1), etc.
Ex: (rocblas_fill_upper; n = 4)
1 2 4 7
2 3 5 8 -----> [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]
4 5 6 9
7 8 9 0
if uplo == rocblas_fill_lower:
The lower triangular portion of the symmetric matrix A is supplied.
The matrix is compacted so that AP contains the triangular portion column-by-column
so that:
AP(0) = A(0,0)
AP(1) = A(1,0)
AP(n) = A(2,1), etc.
Ex: (rocblas_fill_lower; n = 4)
1 2 3 4
2 5 6 7 -----> [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]
3 6 8 9
4 7 9 0
Member Function/Subroutine Documentation
◆ rocblas_dspr2_()
| integer(kind(rocblas_status_success)) function hipfort_rocblas::rocblas_dspr2::rocblas_dspr2_ | ( | type(c_ptr), value | handle, |
| integer(kind(rocblas_fill_upper)), value | uplo, | ||
| integer(c_int), value | n, | ||
| real(c_double) | alpha, | ||
| type(c_ptr), value | x, | ||
| integer(c_int), value | incx, | ||
| type(c_ptr), value | y, | ||
| integer(c_int), value | incy, | ||
| type(c_ptr), value | AP | ||
| ) |
◆ rocblas_dspr2_rank_0()
| integer(kind(rocblas_status_success)) function hipfort_rocblas::rocblas_dspr2::rocblas_dspr2_rank_0 | ( | type(c_ptr) | handle, |
| integer(kind(rocblas_fill_upper)) | uplo, | ||
| integer(c_int) | n, | ||
| real(c_double) | alpha, | ||
| real(c_double), target | x, | ||
| integer(c_int) | incx, | ||
| real(c_double), target | y, | ||
| integer(c_int) | incy, | ||
| type(c_ptr) | AP | ||
| ) |
◆ rocblas_dspr2_rank_1()
| integer(kind(rocblas_status_success)) function hipfort_rocblas::rocblas_dspr2::rocblas_dspr2_rank_1 | ( | type(c_ptr) | handle, |
| integer(kind(rocblas_fill_upper)) | uplo, | ||
| integer(c_int) | n, | ||
| real(c_double) | alpha, | ||
| real(c_double), dimension(:), target | x, | ||
| integer(c_int) | incx, | ||
| real(c_double), dimension(:), target | y, | ||
| integer(c_int) | incy, | ||
| type(c_ptr) | AP | ||
| ) |
The documentation for this interface was generated from the following file: