37.cuBLAS开发指南中文版--cuBLAS中的Level-2函数her()

2.6.20. cublasher()

cublasStatus_t cublasCher(cublasHandle_t handle, cublasFillMode_t uplo,
                          int n, const float  *alpha,
                          const cuComplex       *x, int incx,
                          cuComplex       *A, int lda)
cublasStatus_t cublasZher(cublasHandle_t handle, cublasFillMode_t uplo,
                          int n, const double *alpha,
                          const cuDoubleComplex *x, int incx,
                          cuDoubleComplex *A, int lda)

此函数执行 Hermitian rank-1 更新

$A=\alpha x{x}^H+A$

其中 A 是以列优先格式存储的 NxN Hermitian 矩阵，x 是向量，$\alpha$ 是标量。

Param.	Memory	In/out	Meaning
handle		input	handle to the cuBLAS library context.
uplo		input	Indicates if matrix A lower or upper part is stored, the other Hermitian part is not referenced and is inferred from the stored elements.
n		input	number of columns of matrix A.
alpha	host or device	input	scalar used for multiplication.
A	device	input/output	array of dimensions lda x n, with lda>=max(1,n). The imaginary parts of the diagonal elements are assumed and set to zero.
x	device	input	vector with n elements if transa == CUBLAS_OP_N and m elements otherwise.
incx		input	stride between consecutive elements of x.

该函数可能返回的错误值及其含义如下所列。

ErrorValue	Meaning
CUBLAS_STATUS_SUCCESS	操作成功完成
CUBLAS_STATUS_NOT_INITIALIZED	库未初始化
CUBLAS_STATUS_INVALID_VALUE	If n < 0 or if incx == 0 or if uplo != CUBLAS_FILL_MODE_UPPER ,CUBLAS_FILL_MODE_LOWER or if lda < max(1, n) oralpha == NULL
CUBLAS_STATUS_EXECUTION_FAILED	该功能无法在 GPU 上启动

详细信息, 请参考:

cher, zher