rocblas_drotmg_batched Interface Reference

rocblas_drotmg_batched Interface Reference#

HIPFORT API Reference: hipfort_rocblas::rocblas_drotmg_batched Interface Reference

BLAS Level 1 API. More...

Public Member Functions
integer(kind(rocblas_status_success)) function	rocblas_drotmg_batched_ (handle, d1, d2, x1, y1, param, batch_count)

Detailed Description

BLAS Level 1 API.

rotmg_batched creates the modified Givens rotation matrix for the batched vectors (d1_i * x1_i, d2_i * y1_i), for i = 1, ..., batch_count. Parameters may be stored in either host or device memory, location is specified by calling rocblas_set_pointer_mode. If the pointer mode is set to rocblas_pointer_mode_host, this function blocks the CPU until the GPU has finished and the results are available in host memory. If the pointer mode is set to rocblas_pointer_mode_device, this function returns immediately and synchronization is required to read the results.

Parameters

[in]	handle	[rocblas_handle] handle to the rocblas library context queue.
[in,out]	d1	device batched array or host batched array of input scalars that is overwritten.
[in,out]	d2	device batched array or host batched array of input scalars that is overwritten.
[in,out]	x1	device batched array or host batched array of input scalars that is overwritten.
[in]	y1	device batched array or host batched array of input scalars.
[out]	param	device batched array or host batched array of vectors of 5 elements defining the rotation. param[0] = flag param[1] = H11 param[2] = H21 param[3] = H12 param[4] = H22 The flag parameter defines the form of H: flag = -1 => H = ( H11 H12 H21 H22 ) flag = 0 => H = ( 1.0 H12 H21 1.0 ) flag = 1 => H = ( H11 1.0 -1.0 H22 ) flag = -2 => H = ( 1.0 0.0 0.0 1.0 ) param may be stored in either host or device memory, location is specified by calling rocblas_set_pointer_mode.
[in]	batch_count	[rocblas_int] the number of instances in the batch.

Member Function/Subroutine Documentation