rocBLAS Level-3 functions

rocBLAS Level-3 functions perform matix-matrix operations. [Level3]

rocblas_Xgemm + batched, strided_batched

rocblas_status rocblas_sgemm(rocblas_handle handle, rocblas_operation transA, rocblas_operation transB, rocblas_int m, rocblas_int n, rocblas_int k, const float *alpha, const float *A, rocblas_int lda, const float *B, rocblas_int ldb, const float *beta, float *C, rocblas_int ldc)

rocblas_status rocblas_dgemm(rocblas_handle handle, rocblas_operation transA, rocblas_operation transB, rocblas_int m, rocblas_int n, rocblas_int k, const double *alpha, const double *A, rocblas_int lda, const double *B, rocblas_int ldb, const double *beta, double *C, rocblas_int ldc)

rocblas_status rocblas_hgemm(rocblas_handle handle, rocblas_operation transA, rocblas_operation transB, rocblas_int m, rocblas_int n, rocblas_int k, const rocblas_half *alpha, const rocblas_half *A, rocblas_int lda, const rocblas_half *B, rocblas_int ldb, const rocblas_half *beta, rocblas_half *C, rocblas_int ldc)

rocblas_status rocblas_cgemm(rocblas_handle handle, rocblas_operation transA, rocblas_operation transB, rocblas_int m, rocblas_int n, rocblas_int k, const rocblas_float_complex *alpha, const rocblas_float_complex *A, rocblas_int lda, const rocblas_float_complex *B, rocblas_int ldb, const rocblas_float_complex *beta, rocblas_float_complex *C, rocblas_int ldc)

rocblas_status rocblas_zgemm(rocblas_handle handle, rocblas_operation transA, rocblas_operation transB, rocblas_int m, rocblas_int n, rocblas_int k, const rocblas_double_complex *alpha, const rocblas_double_complex *A, rocblas_int lda, const rocblas_double_complex *B, rocblas_int ldb, const rocblas_double_complex *beta, rocblas_double_complex *C, rocblas_int ldc)

BLAS Level 3 API

gemm performs one of the matrix-matrix operations:

C = alpha*op( A )*op( B ) + beta*C,

where op( X ) is one of

op( X ) = X      or
op( X ) = X**T   or
op( X ) = X**H,

alpha and beta are scalars, and A, B and C are matrices, with
op( A ) an m by k matrix, op( B ) a k by n matrix and C an m by n matrix.

Although not widespread, some gemm kernels may use atomic operations. See Atomic Operations in the API Reference Guide for more information.

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• transA – [in] [rocblas_operation] specifies the form of op( A ).

• transB – [in] [rocblas_operation] specifies the form of op( B ).

• m – [in] [rocblas_int] number or rows of matrices op( A ) and C.

• n – [in] [rocblas_int] number of columns of matrices op( B ) and C.

• k – [in] [rocblas_int] number of columns of matrix op( A ) and number of rows of matrix op( B ).

• alpha – [in] device pointer or host pointer specifying the scalar alpha.

• A – [in] device pointer storing matrix A.

• lda – [in] [rocblas_int] specifies the leading dimension of A.

• B – [in] device pointer storing matrix B.

• ldb – [in] [rocblas_int] specifies the leading dimension of B.

• beta – [in] device pointer or host pointer specifying the scalar beta.

• C – [inout] device pointer storing matrix C on the GPU.

• ldc – [in] [rocblas_int] specifies the leading dimension of C.

rocblas_status rocblas_sgemm_batched(rocblas_handle handle, rocblas_operation transA, rocblas_operation transB, rocblas_int m, rocblas_int n, rocblas_int k, const float *alpha, const float *const A[], rocblas_int lda, const float *const B[], rocblas_int ldb, const float *beta, float *const C[], rocblas_int ldc, rocblas_int batch_count)

rocblas_status rocblas_dgemm_batched(rocblas_handle handle, rocblas_operation transA, rocblas_operation transB, rocblas_int m, rocblas_int n, rocblas_int k, const double *alpha, const double *const A[], rocblas_int lda, const double *const B[], rocblas_int ldb, const double *beta, double *const C[], rocblas_int ldc, rocblas_int batch_count)

rocblas_status rocblas_hgemm_batched(rocblas_handle handle, rocblas_operation transA, rocblas_operation transB, rocblas_int m, rocblas_int n, rocblas_int k, const rocblas_half *alpha, const rocblas_half *const A[], rocblas_int lda, const rocblas_half *const B[], rocblas_int ldb, const rocblas_half *beta, rocblas_half *const C[], rocblas_int ldc, rocblas_int batch_count)

rocblas_status rocblas_cgemm_batched(rocblas_handle handle, rocblas_operation transA, rocblas_operation transB, rocblas_int m, rocblas_int n, rocblas_int k, const rocblas_float_complex *alpha, const rocblas_float_complex *const A[], rocblas_int lda, const rocblas_float_complex *const B[], rocblas_int ldb, const rocblas_float_complex *beta, rocblas_float_complex *const C[], rocblas_int ldc, rocblas_int batch_count)

rocblas_status rocblas_zgemm_batched(rocblas_handle handle, rocblas_operation transA, rocblas_operation transB, rocblas_int m, rocblas_int n, rocblas_int k, const rocblas_double_complex *alpha, const rocblas_double_complex *const A[], rocblas_int lda, const rocblas_double_complex *const B[], rocblas_int ldb, const rocblas_double_complex *beta, rocblas_double_complex *const C[], rocblas_int ldc, rocblas_int batch_count)

BLAS Level 3 API

gemm_batched performs one of the batched matrix-matrix operations:

C_i = alpha*op( A_i )*op( B_i ) + beta*C_i, for i = 1, ..., batch_count,

where op( X ) is one of

op( X ) = X      or
op( X ) = X**T   or
op( X ) = X**H,

alpha and beta are scalars, and A, B and C are strided batched matrices, with

op( A ) an m by k by batch_count matrices,
op( B ) an k by n by batch_count matrices and
C an m by n by batch_count matrices.

Parameters:

• handle – [in] [rocblas_handle handle to the rocblas library context queue.

• transA – [in] [rocblas_operation] specifies the form of op( A ).

• transB – [in] [rocblas_operation] specifies the form of op( B ).

• m – [in] [rocblas_int] matrix dimention m.

• n – [in] [rocblas_int] matrix dimention n.

• k – [in] [rocblas_int] matrix dimention k.

• alpha – [in] device pointer or host pointer specifying the scalar alpha.

• A – [in] device array of device pointers storing each matrix A_i.

• lda – [in] [rocblas_int] specifies the leading dimension of each A_i.

• B – [in] device array of device pointers storing each matrix B_i.

• ldb – [in] [rocblas_int] specifies the leading dimension of each B_i.

• beta – [in] device pointer or host pointer specifying the scalar beta.

• C – [inout] device array of device pointers storing each matrix C_i.

• ldc – [in] [rocblas_int] specifies the leading dimension of each C_i.

• batch_count – [in] [rocblas_int] number of gemm operations in the batch.

rocblas_status rocblas_sgemm_strided_batched(rocblas_handle handle, rocblas_operation transA, rocblas_operation transB, rocblas_int m, rocblas_int n, rocblas_int k, const float *alpha, const float *A, rocblas_int lda, rocblas_stride stride_a, const float *B, rocblas_int ldb, rocblas_stride stride_b, const float *beta, float *C, rocblas_int ldc, rocblas_stride stride_c, rocblas_int batch_count)

rocblas_status rocblas_dgemm_strided_batched(rocblas_handle handle, rocblas_operation transA, rocblas_operation transB, rocblas_int m, rocblas_int n, rocblas_int k, const double *alpha, const double *A, rocblas_int lda, rocblas_stride stride_a, const double *B, rocblas_int ldb, rocblas_stride stride_b, const double *beta, double *C, rocblas_int ldc, rocblas_stride stride_c, rocblas_int batch_count)

rocblas_status rocblas_hgemm_strided_batched(rocblas_handle handle, rocblas_operation transA, rocblas_operation transB, rocblas_int m, rocblas_int n, rocblas_int k, const rocblas_half *alpha, const rocblas_half *A, rocblas_int lda, rocblas_stride stride_a, const rocblas_half *B, rocblas_int ldb, rocblas_stride stride_b, const rocblas_half *beta, rocblas_half *C, rocblas_int ldc, rocblas_stride stride_c, rocblas_int batch_count)

rocblas_status rocblas_cgemm_strided_batched(rocblas_handle handle, rocblas_operation transA, rocblas_operation transB, rocblas_int m, rocblas_int n, rocblas_int k, const rocblas_float_complex *alpha, const rocblas_float_complex *A, rocblas_int lda, rocblas_stride stride_a, const rocblas_float_complex *B, rocblas_int ldb, rocblas_stride stride_b, const rocblas_float_complex *beta, rocblas_float_complex *C, rocblas_int ldc, rocblas_stride stride_c, rocblas_int batch_count)

rocblas_status rocblas_zgemm_strided_batched(rocblas_handle handle, rocblas_operation transA, rocblas_operation transB, rocblas_int m, rocblas_int n, rocblas_int k, const rocblas_double_complex *alpha, const rocblas_double_complex *A, rocblas_int lda, rocblas_stride stride_a, const rocblas_double_complex *B, rocblas_int ldb, rocblas_stride stride_b, const rocblas_double_complex *beta, rocblas_double_complex *C, rocblas_int ldc, rocblas_stride stride_c, rocblas_int batch_count)

BLAS Level 3 API

gemm_strided_batched performs one of the strided batched matrix-matrix operations:

C_i = alpha*op( A_i )*op( B_i ) + beta*C_i, for i = 1, ..., batch_count,

where op( X ) is one of

op( X ) = X      or
op( X ) = X**T   or
op( X ) = X**H,

alpha and beta are scalars, and A, B and C are strided batched matrices, with
op( A ) an m by k by batch_count strided_batched matrix,
op( B ) an k by n by batch_count strided_batched matrix and
C an m by n by batch_count strided_batched matrix.

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• transA – [in] [rocblas_operation] specifies the form of op( A ).

• transB – [in] [rocblas_operation] specifies the form of op( B ).

• m – [in] [rocblas_int] matrix dimention m.

• n – [in] [rocblas_int] matrix dimention n.

• k – [in] [rocblas_int] matrix dimention k.

• alpha – [in] device pointer or host pointer specifying the scalar alpha.

• A – [in] device pointer pointing to the first matrix A_1.

• lda – [in] [rocblas_int] specifies the leading dimension of each A_i.

• stride_a – [in] [rocblas_stride] stride from the start of one A_i matrix to the next A_(i + 1).

• B – [in] device pointer pointing to the first matrix B_1.

• ldb – [in] [rocblas_int] specifies the leading dimension of each B_i.

• stride_b – [in] [rocblas_stride] stride from the start of one B_i matrix to the next B_(i + 1).

• beta – [in] device pointer or host pointer specifying the scalar beta.

• C – [inout] device pointer pointing to the first matrix C_1.

• ldc – [in] [rocblas_int] specifies the leading dimension of each C_i.

• stride_c – [in] [rocblas_stride] stride from the start of one C_i matrix to the next C_(i + 1).

• batch_count – [in] [rocblas_int] number of gemm operatons in the batch.

rocblas_Xsymm + batched, strided_batched

rocblas_status rocblas_ssymm(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_int m, rocblas_int n, const float *alpha, const float *A, rocblas_int lda, const float *B, rocblas_int ldb, const float *beta, float *C, rocblas_int ldc)

rocblas_status rocblas_dsymm(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_int m, rocblas_int n, const double *alpha, const double *A, rocblas_int lda, const double *B, rocblas_int ldb, const double *beta, double *C, rocblas_int ldc)

rocblas_status rocblas_csymm(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_int m, rocblas_int n, const rocblas_float_complex *alpha, const rocblas_float_complex *A, rocblas_int lda, const rocblas_float_complex *B, rocblas_int ldb, const rocblas_float_complex *beta, rocblas_float_complex *C, rocblas_int ldc)

rocblas_status rocblas_zsymm(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_int m, rocblas_int n, const rocblas_double_complex *alpha, const rocblas_double_complex *A, rocblas_int lda, const rocblas_double_complex *B, rocblas_int ldb, const rocblas_double_complex *beta, rocblas_double_complex *C, rocblas_int ldc)

BLAS Level 3 API

symm performs one of the matrix-matrix operations:

C := alpha*A*B + beta*C if side == rocblas_side_left,
C := alpha*B*A + beta*C if side == rocblas_side_right,

where alpha and beta are scalars, B and C are m by n matrices, and
A is a symmetric matrix stored as either upper or lower.

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• side – [in] [rocblas_side]

  • rocblas_side_left: C := alpha*A*B + beta*C

  • rocblas_side_right: C := alpha*B*A + beta*C

• uplo – [in] [rocblas_fill]

  • rocblas_fill_upper: A is an upper triangular matrix

  • rocblas_fill_lower: A is a lower triangular matrix

• m – [in] [rocblas_int] m specifies the number of rows of B and C. m >= 0.

• n – [in] [rocblas_int] n specifies the number of columns of B and C. n >= 0.

• alpha – [in] alpha specifies the scalar alpha. When alpha is zero then A and B are not referenced.

• A – [in] pointer storing matrix A on the GPU.

  • A is m by m if side == rocblas_side_left

  • A is n by n if side == rocblas_side_right only the upper/lower triangular part is accessed.

• lda – [in] [rocblas_int] lda specifies the first dimension of A.

  if side = rocblas_side_left,  lda >= max( 1, m ),
  otherwise lda >= max( 1, n ).
  

• B – [in] pointer storing matrix B on the GPU. Matrix dimension is m by n

• ldb – [in] [rocblas_int] ldb specifies the first dimension of B. ldb >= max( 1, m ).

• beta – [in] beta specifies the scalar beta. When beta is zero then C need not be set before entry.

• C – [in] pointer storing matrix C on the GPU. Matrix dimension is m by n

• ldc – [in] [rocblas_int] ldc specifies the first dimension of C. ldc >= max( 1, m ).

rocblas_status rocblas_ssymm_batched(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_int m, rocblas_int n, const float *alpha, const float *const A[], rocblas_int lda, const float *const B[], rocblas_int ldb, const float *beta, float *const C[], rocblas_int ldc, rocblas_int batch_count)

rocblas_status rocblas_dsymm_batched(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_int m, rocblas_int n, const double *alpha, const double *const A[], rocblas_int lda, const double *const B[], rocblas_int ldb, const double *beta, double *const C[], rocblas_int ldc, rocblas_int batch_count)

rocblas_status rocblas_csymm_batched(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_int m, rocblas_int n, const rocblas_float_complex *alpha, const rocblas_float_complex *const A[], rocblas_int lda, const rocblas_float_complex *const B[], rocblas_int ldb, const rocblas_float_complex *beta, rocblas_float_complex *const C[], rocblas_int ldc, rocblas_int batch_count)

rocblas_status rocblas_zsymm_batched(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_int m, rocblas_int n, const rocblas_double_complex *alpha, const rocblas_double_complex *const A[], rocblas_int lda, const rocblas_double_complex *const B[], rocblas_int ldb, const rocblas_double_complex *beta, rocblas_double_complex *const C[], rocblas_int ldc, rocblas_int batch_count)

BLAS Level 3 API

symm_batched performs a batch of the matrix-matrix operations:

C_i := alpha*A_i*B_i + beta*C_i if side == rocblas_side_left,
C_i := alpha*B_i*A_i + beta*C_i if side == rocblas_side_right,

where alpha and beta are scalars, B_i and C_i are m by n matrices, and
A_i is a symmetric matrix stored as either upper or lower.

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• side – [in] [rocblas_side]

  • rocblas_side_left: C_i := alpha*A_i*B_i + beta*C_i

  • rocblas_side_right: C_i := alpha*B_i*A_i + beta*C_i

• uplo – [in] [rocblas_fill]

  • rocblas_fill_upper: A_i is an upper triangular matrix

  • rocblas_fill_lower: A_i is a lower triangular matrix

• m – [in] [rocblas_int] m specifies the number of rows of B_i and C_i. m >= 0.

• n – [in] [rocblas_int] n specifies the number of columns of B_i and C_i. n >= 0.

• alpha – [in] alpha specifies the scalar alpha. When alpha is zero then A_i and B_i are not referenced.

• A – [in] device array of device pointers storing each matrix A_i on the GPU.

  • A_i is m by m if side == rocblas_side_left

  • A_i is n by n if side == rocblas_side_right only the upper/lower triangular part is accessed.

• lda – [in] [rocblas_int] lda specifies the first dimension of A_i.

  if side = rocblas_side_left,  lda >= max( 1, m ),
  otherwise lda >= max( 1, n ).
  

• B – [in] device array of device pointers storing each matrix B_i on the GPU. Matrix dimension is m by n

• ldb – [in] [rocblas_int] ldb specifies the first dimension of B_i. ldb >= max( 1, m ).

• beta – [in] beta specifies the scalar beta. When beta is zero then C_i need not be set before entry.

• C – [in] device array of device pointers storing each matrix C_i on the GPU. Matrix dimension is m by n.

• ldc – [in] [rocblas_int] ldc specifies the first dimension of C_i. ldc >= max( 1, m ).

• batch_count – [in] [rocblas_int] number of instances in the batch.

rocblas_status rocblas_ssymm_strided_batched(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_int m, rocblas_int n, const float *alpha, const float *A, rocblas_int lda, rocblas_stride stride_A, const float *B, rocblas_int ldb, rocblas_stride stride_B, const float *beta, float *C, rocblas_int ldc, rocblas_stride stride_C, rocblas_int batch_count)

rocblas_status rocblas_dsymm_strided_batched(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_int m, rocblas_int n, const double *alpha, const double *A, rocblas_int lda, rocblas_stride stride_A, const double *B, rocblas_int ldb, rocblas_stride stride_B, const double *beta, double *C, rocblas_int ldc, rocblas_stride stride_C, rocblas_int batch_count)

rocblas_status rocblas_csymm_strided_batched(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_int m, rocblas_int n, const rocblas_float_complex *alpha, const rocblas_float_complex *A, rocblas_int lda, rocblas_stride stride_A, const rocblas_float_complex *B, rocblas_int ldb, rocblas_stride stride_B, const rocblas_float_complex *beta, rocblas_float_complex *C, rocblas_int ldc, rocblas_stride stride_C, rocblas_int batch_count)

rocblas_status rocblas_zsymm_strided_batched(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_int m, rocblas_int n, const rocblas_double_complex *alpha, const rocblas_double_complex *A, rocblas_int lda, rocblas_stride stride_A, const rocblas_double_complex *B, rocblas_int ldb, rocblas_stride stride_B, const rocblas_double_complex *beta, rocblas_double_complex *C, rocblas_int ldc, rocblas_stride stride_C, rocblas_int batch_count)

BLAS Level 3 API

symm_strided_batched performs a batch of the matrix-matrix operations:

C_i := alpha*A_i*B_i + beta*C_i if side == rocblas_side_left,
C_i := alpha*B_i*A_i + beta*C_i if side == rocblas_side_right,

where alpha and beta are scalars, B_i and C_i are m by n matrices, and
A_i is a symmetric matrix stored as either upper or lower.

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• side – [in] [rocblas_side]

  • rocblas_side_left: C_i := alpha*A_i*B_i + beta*C_i

  • rocblas_side_right: C_i := alpha*B_i*A_i + beta*C_i

• uplo – [in] [rocblas_fill]

  • rocblas_fill_upper: A_i is an upper triangular matrix

  • rocblas_fill_lower: A_i is a lower triangular matrix

• m – [in] [rocblas_int] m specifies the number of rows of B_i and C_i. m >= 0.

• n – [in] [rocblas_int] n specifies the number of columns of B_i and C_i. n >= 0.

• alpha – [in] alpha specifies the scalar alpha. When alpha is zero then A_i and B_i are not referenced.

• A – [in] device pointer to first matrix A_1

  • A_i is m by m if side == rocblas_side_left

  • A_i is n by n if side == rocblas_side_right only the upper/lower triangular part is accessed.

• lda – [in] [rocblas_int] lda specifies the first dimension of A_i.

  if side = rocblas_side_left,  lda >= max( 1, m ),
  otherwise lda >= max( 1, n ).
  

• stride_A – [in] [rocblas_stride] stride from the start of one matrix (A_i) and the next one (A_i+1).

• B – [in] device pointer to first matrix B_1 of dimension (ldb, n) on the GPU.

• ldb – [in] [rocblas_int] ldb specifies the first dimension of B_i. ldb >= max( 1, m ).

• stride_B – [in] [rocblas_stride] stride from the start of one matrix (B_i) and the next one (B_i+1).

• beta – [in] beta specifies the scalar beta. When beta is zero then C need not be set before entry.

• C – [in] device pointer to first matrix C_1 of dimension (ldc, n) on the GPU.

• ldc – [in] [rocblas_int] ldc specifies the first dimension of C. ldc >= max( 1, m ).

• stride_C – [inout] [rocblas_stride] stride from the start of one matrix (C_i) and the next one (C_i+1).

• batch_count – [in] [rocblas_int] number of instances in the batch.

rocblas_Xsyrk + batched, strided_batched

rocblas_status rocblas_ssyrk(rocblas_handle handle, rocblas_fill uplo, rocblas_operation transA, rocblas_int n, rocblas_int k, const float *alpha, const float *A, rocblas_int lda, const float *beta, float *C, rocblas_int ldc)

rocblas_status rocblas_dsyrk(rocblas_handle handle, rocblas_fill uplo, rocblas_operation transA, rocblas_int n, rocblas_int k, const double *alpha, const double *A, rocblas_int lda, const double *beta, double *C, rocblas_int ldc)

rocblas_status rocblas_csyrk(rocblas_handle handle, rocblas_fill uplo, rocblas_operation transA, rocblas_int n, rocblas_int k, const rocblas_float_complex *alpha, const rocblas_float_complex *A, rocblas_int lda, const rocblas_float_complex *beta, rocblas_float_complex *C, rocblas_int ldc)

rocblas_status rocblas_zsyrk(rocblas_handle handle, rocblas_fill uplo, rocblas_operation transA, rocblas_int n, rocblas_int k, const rocblas_double_complex *alpha, const rocblas_double_complex *A, rocblas_int lda, const rocblas_double_complex *beta, rocblas_double_complex *C, rocblas_int ldc)

BLAS Level 3 API

syrk performs one of the matrix-matrix operations for a symmetric rank-k update:

C := alpha*op( A )*op( A )^T + beta*C,

where  alpha and beta are scalars, op(A) is an n by k matrix, and
C is a symmetric n x n matrix stored as either upper or lower.

op( A ) = A, and A is n by k if transA == rocblas_operation_none
op( A ) = A^T and A is k by n if transA == rocblas_operation_transpose

rocblas_operation_conjugate_transpose is not supported for complex types. See cherk and zherk.

if transA = rocblas_operation_none, lda >= max( 1, n ), otherwise lda >= max( 1, k ).

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• uplo – [in] [rocblas_fill]

  • rocblas_fill_upper: C is an upper triangular matrix

  • rocblas_fill_lower: C is a lower triangular matrix

• transA – [in] [rocblas_operation]

  • rocblas_operation_transpose: op(A) = A^T

  • rocblas_operation_none: op(A) = A

  • rocblas_operation_conjugate_transpose: op(A) = A^T

• n – [in] [rocblas_int] n specifies the number of rows and columns of C. n >= 0.

• k – [in] [rocblas_int] k specifies the number of columns of op(A). k >= 0.

• alpha – [in] alpha specifies the scalar alpha. When alpha is zero then A is not referenced and A need not be set before entry.

• A – [in] pointer storing matrix A on the GPU. Matrix dimension is ( lda, k ) when if transA = rocblas_operation_none, otherwise (lda, n)

• lda – [in] [rocblas_int] lda specifies the first dimension of A.

• beta – [in] beta specifies the scalar beta. When beta is zero then C need not be set before entry.

• C – [in] pointer storing matrix C on the GPU. only the upper/lower triangular part is accessed.

• ldc – [in] [rocblas_int] ldc specifies the first dimension of C. ldc >= max( 1, n ).

rocblas_status rocblas_ssyrk_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation transA, rocblas_int n, rocblas_int k, const float *alpha, const float *const A[], rocblas_int lda, const float *beta, float *const C[], rocblas_int ldc, rocblas_int batch_count)

rocblas_status rocblas_dsyrk_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation transA, rocblas_int n, rocblas_int k, const double *alpha, const double *const A[], rocblas_int lda, const double *beta, double *const C[], rocblas_int ldc, rocblas_int batch_count)

rocblas_status rocblas_csyrk_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation transA, rocblas_int n, rocblas_int k, const rocblas_float_complex *alpha, const rocblas_float_complex *const A[], rocblas_int lda, const rocblas_float_complex *beta, rocblas_float_complex *const C[], rocblas_int ldc, rocblas_int batch_count)

rocblas_status rocblas_zsyrk_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation transA, rocblas_int n, rocblas_int k, const rocblas_double_complex *alpha, const rocblas_double_complex *const A[], rocblas_int lda, const rocblas_double_complex *beta, rocblas_double_complex *const C[], rocblas_int ldc, rocblas_int batch_count)

BLAS Level 3 API

syrk_batched performs a batch of the matrix-matrix operations for a symmetric rank-k update:

C_i := alpha*op( A_i )*op( A_i )^T + beta*C_i,

where  alpha and beta are scalars, op(A_i) is an n by k matrix, and
C_i is a symmetric n x n matrix stored as either upper or lower.

op( A_i ) = A_i, and A_i is n by k if transA == rocblas_operation_none
op( A_i ) = A_i^T and A_i is k by n if transA == rocblas_operation_transpose

rocblas_operation_conjugate_transpose is not supported for complex types. See cherk and zherk.

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• uplo – [in] [rocblas_fill]

  • rocblas_fill_upper: C_i is an upper triangular matrix

  • rocblas_fill_lower: C_i is a lower triangular matrix

• transA – [in] [rocblas_operation]

  • rocblas_operation_transpose: op(A) = A^T

  • rocblas_operation_none: op(A) = A

  • rocblas_operation_conjugate_transpose: op(A) = A^T

• n – [in] [rocblas_int] n specifies the number of rows and columns of C_i. n >= 0.

• k – [in] [rocblas_int] k specifies the number of columns of op(A). k >= 0.

• alpha – [in] alpha specifies the scalar alpha. When alpha is zero then A is not referenced and A need not be set before entry.

• A – [in] device array of device pointers storing each matrix_i A of dimension (lda, k) when transA is rocblas_operation_none, otherwise of dimension (lda, n).

• lda – [in] [rocblas_int] lda specifies the first dimension of A_i.

  if transA = rocblas_operation_none,  lda >= max( 1, n ),
  otherwise lda >= max( 1, k ).
  

• beta – [in] beta specifies the scalar beta. When beta is zero then C need not be set before entry.

• C – [in] device array of device pointers storing each matrix C_i on the GPU. only the upper/lower triangular part of each C_i is accessed.

• ldc – [in] [rocblas_int] ldc specifies the first dimension of C. ldc >= max( 1, n ).

• batch_count – [in] [rocblas_int] number of instances in the batch.

rocblas_status rocblas_ssyrk_strided_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation transA, rocblas_int n, rocblas_int k, const float *alpha, const float *A, rocblas_int lda, rocblas_stride stride_A, const float *beta, float *C, rocblas_int ldc, rocblas_stride stride_C, rocblas_int batch_count)

rocblas_status rocblas_dsyrk_strided_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation transA, rocblas_int n, rocblas_int k, const double *alpha, const double *A, rocblas_int lda, rocblas_stride stride_A, const double *beta, double *C, rocblas_int ldc, rocblas_stride stride_C, rocblas_int batch_count)

rocblas_status rocblas_csyrk_strided_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation transA, rocblas_int n, rocblas_int k, const rocblas_float_complex *alpha, const rocblas_float_complex *A, rocblas_int lda, rocblas_stride stride_A, const rocblas_float_complex *beta, rocblas_float_complex *C, rocblas_int ldc, rocblas_stride stride_C, rocblas_int batch_count)

rocblas_status rocblas_zsyrk_strided_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation transA, rocblas_int n, rocblas_int k, const rocblas_double_complex *alpha, const rocblas_double_complex *A, rocblas_int lda, rocblas_stride stride_A, const rocblas_double_complex *beta, rocblas_double_complex *C, rocblas_int ldc, rocblas_stride stride_C, rocblas_int batch_count)

BLAS Level 3 API

syrk_strided_batched performs a batch of the matrix-matrix operations for a symmetric rank-k update:

C_i := alpha*op( A_i )*op( A_i )^T + beta*C_i,

where  alpha and beta are scalars, op(A_i) is an n by k matrix, and
C_i is a symmetric n x n matrix stored as either upper or lower.

op( A_i ) = A_i, and A_i is n by k if transA == rocblas_operation_none
op( A_i ) = A_i^T and A_i is k by n if transA == rocblas_operation_transpose

rocblas_operation_conjugate_transpose is not supported for complex types. See cherk and zherk.

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• uplo – [in] [rocblas_fill]

  • rocblas_fill_upper: C_i is an upper triangular matrix

  • rocblas_fill_lower: C_i is a lower triangular matrix

• transA – [in] [rocblas_operation]

  • rocblas_operation_transpose: op(A) = A^T

  • rocblas_operation_none: op(A) = A

  • rocblas_operation_conjugate_transpose: op(A) = A^T

• n – [in] [rocblas_int] n specifies the number of rows and columns of C_i. n >= 0.

• k – [in] [rocblas_int] k specifies the number of columns of op(A). k >= 0.

• alpha – [in] alpha specifies the scalar alpha. When alpha is zero then A is not referenced and A need not be set before entry.

• A – [in] Device pointer to the first matrix A_1 on the GPU of dimension (lda, k) when transA is rocblas_operation_none, otherwise of dimension (lda, n).

• lda – [in] [rocblas_int] lda specifies the first dimension of A_i.

  if transA = rocblas_operation_none,  lda >= max( 1, n ),
  otherwise lda >= max( 1, k ).
  

• stride_A – [in] [rocblas_stride] stride from the start of one matrix (A_i) and the next one (A_i+1).

• beta – [in] beta specifies the scalar beta. When beta is zero then C need not be set before entry.

• C – [in] Device pointer to the first matrix C_1 on the GPU. on the GPU. only the upper/lower triangular part of each C_i is accessed.

• ldc – [in] [rocblas_int] ldc specifies the first dimension of C. ldc >= max( 1, n ).

• stride_C – [inout] [rocblas_stride] stride from the start of one matrix (C_i) and the next one (C_i+1)

• batch_count – [in] [rocblas_int] number of instances in the batch.

rocblas_Xsyr2k + batched, strided_batched

rocblas_status rocblas_ssyr2k(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const float *alpha, const float *A, rocblas_int lda, const float *B, rocblas_int ldb, const float *beta, float *C, rocblas_int ldc)

rocblas_status rocblas_dsyr2k(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const double *alpha, const double *A, rocblas_int lda, const double *B, rocblas_int ldb, const double *beta, double *C, rocblas_int ldc)

rocblas_status rocblas_csyr2k(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const rocblas_float_complex *alpha, const rocblas_float_complex *A, rocblas_int lda, const rocblas_float_complex *B, rocblas_int ldb, const rocblas_float_complex *beta, rocblas_float_complex *C, rocblas_int ldc)

rocblas_status rocblas_zsyr2k(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const rocblas_double_complex *alpha, const rocblas_double_complex *A, rocblas_int lda, const rocblas_double_complex *B, rocblas_int ldb, const rocblas_double_complex *beta, rocblas_double_complex *C, rocblas_int ldc)

BLAS Level 3 API

syr2k performs one of the matrix-matrix operations for a symmetric rank-2k update:

C := alpha*(op( A )*op( B )^T + op( B )*op( A )^T) + beta*C,

where  alpha and beta are scalars, op(A) and op(B) are n by k matrix, and
C is a symmetric n x n matrix stored as either upper or lower.

op( A ) = A, op( B ) = B, and A and B are n by k if trans == rocblas_operation_none
op( A ) = A^T, op( B ) = B^T, and A and B are k by n if trans == rocblas_operation_transpose
or for ssyr2k and dsyr2k when trans == rocblas_operation_conjugate_transpose

rocblas_operation_conjugate_transpose is not supported for complex types in csyr2k and zsyr2k.

if trans = rocblas_operation_none, lda >= max( 1, n ), otherwise lda >= max( 1, k ).

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• uplo – [in] [rocblas_fill]

  • rocblas_fill_upper: C is an upper triangular matrix

  • rocblas_fill_lower: C is a lower triangular matrix

• trans – [in] [rocblas_operation]

  • rocblas_operation_transpose: op( A ) = A^T, op( B ) = B^T

  • rocblas_operation_none: op( A ) = A, op( B ) = B

  • rocblas_operation_conjugate_transpose: op( A ) = A^T, op( B ) = B^T

• n – [in] [rocblas_int] n specifies the number of rows and columns of C. n >= 0.

• k – [in] [rocblas_int] k specifies the number of columns of op(A) and op(B). k >= 0.

• alpha – [in] alpha specifies the scalar alpha. When alpha is zero then A is not referenced and A need not be set before entry.

• A – [in] pointer storing matrix A on the GPU. Matrix dimension is ( lda, k ) when if trans = rocblas_operation_none, otherwise (lda, n) only the upper/lower triangular part is accessed.

• lda – [in] [rocblas_int] lda specifies the first dimension of A.

• B – [in] pointer storing matrix B on the GPU. Matrix dimension is ( ldb, k ) when if trans = rocblas_operation_none, otherwise (ldb, n) only the upper/lower triangular part is accessed.

• ldb – [in] [rocblas_int] ldb specifies the first dimension of B. if trans = rocblas_operation_none, ldb >= max( 1, n ), otherwise ldb >= max( 1, k ).

• beta – [in] beta specifies the scalar beta. When beta is zero then C need not be set before entry.

• C – [in] pointer storing matrix C on the GPU.

• ldc – [in] [rocblas_int] ldc specifies the first dimension of C. ldc >= max( 1, n ).

rocblas_status rocblas_ssyr2k_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const float *alpha, const float *const A[], rocblas_int lda, const float *const B[], rocblas_int ldb, const float *beta, float *const C[], rocblas_int ldc, rocblas_int batch_count)

rocblas_status rocblas_dsyr2k_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const double *alpha, const double *const A[], rocblas_int lda, const double *const B[], rocblas_int ldb, const double *beta, double *const C[], rocblas_int ldc, rocblas_int batch_count)

rocblas_status rocblas_csyr2k_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const rocblas_float_complex *alpha, const rocblas_float_complex *const A[], rocblas_int lda, const rocblas_float_complex *const B[], rocblas_int ldb, const rocblas_float_complex *beta, rocblas_float_complex *const C[], rocblas_int ldc, rocblas_int batch_count)

rocblas_status rocblas_zsyr2k_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const rocblas_double_complex *alpha, const rocblas_double_complex *const A[], rocblas_int lda, const rocblas_double_complex *const B[], rocblas_int ldb, const rocblas_double_complex *beta, rocblas_double_complex *const C[], rocblas_int ldc, rocblas_int batch_count)

BLAS Level 3 API

syr2k_batched performs a batch of the matrix-matrix operations for a symmetric rank-2k update:

C_i := alpha*(op( A_i )*op( B_i )^T + op( B_i )*op( A_i )^T) + beta*C_i,

where  alpha and beta are scalars, op(A_i) and op(B_i) are n by k matrix, and
C_i is a symmetric n x n matrix stored as either upper or lower.

op( A_i ) = A_i, op( B_i ) = B_i, and A_i and B_i are n by k if trans == rocblas_operation_none
op( A_i ) = A_i^T, op( B_i ) = B_i^T, and A_i and B_i are k by n if trans == rocblas_operation_transpose
or for ssyr2k_batched and dsyr2k_batched when trans == rocblas_operation_conjugate_transpose

rocblas_operation_conjugate_transpose is not supported for complex types in csyr2k_batched and zsyr2k_batched.

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• uplo – [in] [rocblas_fill]

  • rocblas_fill_upper: C_i is an upper triangular matrix

  • rocblas_fill_lower: C_i is a lower triangular matrix

• trans – [in] [rocblas_operation]

  • rocblas_operation_transpose: op( A_i ) = A_i^T, op( B_i ) = B_i^T

  • rocblas_operation_none: op( A_i ) = A_i, op( B_i ) = B_i

  • rocblas_operation_conjugate_transpose: op( A_i ) = A_i^T, op( B_i ) = B_i^T

• n – [in] [rocblas_int] n specifies the number of rows and columns of C_i. n >= 0.

• k – [in] [rocblas_int] k specifies the number of columns of op(A). k >= 0.

• alpha – [in] alpha specifies the scalar alpha. When alpha is zero then A is not referenced and A need not be set before entry.

• A – [in] device array of device pointers storing each matrix_i A of dimension (lda, k) when trans is rocblas_operation_none, otherwise of dimension (lda, n).

• lda – [in] [rocblas_int] lda specifies the first dimension of A_i. if trans = rocblas_operation_none, lda >= max( 1, n ), otherwise lda >= max( 1, k ).

• B – [in] device array of device pointers storing each matrix_i B of dimension (ldb, k) when trans is rocblas_operation_none, otherwise of dimension (ldb, n).

• ldb – [in] [rocblas_int] ldb specifies the first dimension of B.

  if trans = rocblas_operation_none,  ldb >= max( 1, n ),
  otherwise ldb >= max( 1, k ).
  

• beta – [in] beta specifies the scalar beta. When beta is zero then C need not be set before entry.

• C – [in] device array of device pointers storing each matrix C_i on the GPU.

• ldc – [in] [rocblas_int] ldc specifies the first dimension of C. ldc >= max( 1, n ).

• batch_count – [in] [rocblas_int] number of instances in the batch.

rocblas_status rocblas_ssyr2k_strided_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const float *alpha, const float *A, rocblas_int lda, rocblas_stride stride_A, const float *B, rocblas_int ldb, rocblas_stride stride_B, const float *beta, float *C, rocblas_int ldc, rocblas_stride stride_C, rocblas_int batch_count)

rocblas_status rocblas_dsyr2k_strided_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const double *alpha, const double *A, rocblas_int lda, rocblas_stride stride_A, const double *B, rocblas_int ldb, rocblas_stride stride_B, const double *beta, double *C, rocblas_int ldc, rocblas_stride stride_C, rocblas_int batch_count)

rocblas_status rocblas_csyr2k_strided_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const rocblas_float_complex *alpha, const rocblas_float_complex *A, rocblas_int lda, rocblas_stride stride_A, const rocblas_float_complex *B, rocblas_int ldb, rocblas_stride stride_B, const rocblas_float_complex *beta, rocblas_float_complex *C, rocblas_int ldc, rocblas_stride stride_C, rocblas_int batch_count)

rocblas_status rocblas_zsyr2k_strided_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const rocblas_double_complex *alpha, const rocblas_double_complex *A, rocblas_int lda, rocblas_stride stride_A, const rocblas_double_complex *B, rocblas_int ldb, rocblas_stride stride_B, const rocblas_double_complex *beta, rocblas_double_complex *C, rocblas_int ldc, rocblas_stride stride_C, rocblas_int batch_count)

BLAS Level 3 API

syr2k_strided_batched performs a batch of the matrix-matrix operations for a symmetric rank-2k update:

C_i := alpha*(op( A_i )*op( B_i )^T + op( B_i )*op( A_i )^T) + beta*C_i,

where  alpha and beta are scalars, op(A_i) and op(B_i) are n by k matrix, and
C_i is a symmetric n x n matrix stored as either upper or lower.

op( A_i ) = A_i, op( B_i ) = B_i, and A_i and B_i are n by k if trans == rocblas_operation_none
op( A_i ) = A_i^T, op( B_i ) = B_i^T, and A_i and B_i are k by n if trans == rocblas_operation_transpose
or for ssyr2k_strided_batched and dsyr2k_strided_batched when trans == rocblas_operation_conjugate_transpose

rocblas_operation_conjugate_transpose is not supported for complex types in csyr2k_strided_batched and zsyr2k_strided_batched.

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• uplo – [in] [rocblas_fill]

  • rocblas_fill_upper: C_i is an upper triangular matrix

  • rocblas_fill_lower: C_i is a lower triangular matrix

• trans – [in] [rocblas_operation]

  • rocblas_operation_transpose: op( A_i ) = A_i^T, op( B_i ) = B_i^T

  • rocblas_operation_none: op( A_i ) = A_i, op( B_i ) = B_i

  • rocblas_operation_conjugate_transpose: op( A_i ) = A_i^T, op( B_i ) = B_i^T

• n – [in] [rocblas_int] n specifies the number of rows and columns of C_i. n >= 0.

• k – [in] [rocblas_int] k specifies the number of columns of op(A). k >= 0.

• alpha – [in] alpha specifies the scalar alpha. When alpha is zero then A is not referenced and A need not be set before entry.

• A – [in] Device pointer to the first matrix A_1 on the GPU of dimension (lda, k) when trans is rocblas_operation_none, otherwise of dimension (lda, n).

• lda – [in] [rocblas_int] lda specifies the first dimension of A_i.

  if trans = rocblas_operation_none,  lda >= max( 1, n ),
  otherwise lda >= max( 1, k ).
  

• stride_A – [in] [rocblas_stride] stride from the start of one matrix (A_i) and the next one (A_i+1)

• B – [in] Device pointer to the first matrix B_1 on the GPU of dimension (ldb, k) when trans is rocblas_operation_none, otherwise of dimension (ldb, n)

• ldb – [in] [rocblas_int] ldb specifies the first dimension of B_i.

  if trans = rocblas_operation_none,  ldb >= max( 1, n ),
  otherwise ldb >= max( 1, k ).
  

• stride_B – [in] [rocblas_stride] stride from the start of one matrix (B_i) and the next one (B_i+1)

• beta – [in] beta specifies the scalar beta. When beta is zero then C need not be set before entry.

• C – [in] Device pointer to the first matrix C_1 on the GPU.

• ldc – [in] [rocblas_int] ldc specifies the first dimension of C. ldc >= max( 1, n ).

• stride_C – [inout] [rocblas_stride] stride from the start of one matrix (C_i) and the next one (C_i+1).

• batch_count – [in] [rocblas_int] number of instances in the batch.

rocblas_Xsyrkx + batched, strided_batched

rocblas_status rocblas_ssyrkx(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const float *alpha, const float *A, rocblas_int lda, const float *B, rocblas_int ldb, const float *beta, float *C, rocblas_int ldc)

rocblas_status rocblas_dsyrkx(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const double *alpha, const double *A, rocblas_int lda, const double *B, rocblas_int ldb, const double *beta, double *C, rocblas_int ldc)

rocblas_status rocblas_csyrkx(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const rocblas_float_complex *alpha, const rocblas_float_complex *A, rocblas_int lda, const rocblas_float_complex *B, rocblas_int ldb, const rocblas_float_complex *beta, rocblas_float_complex *C, rocblas_int ldc)

rocblas_status rocblas_zsyrkx(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const rocblas_double_complex *alpha, const rocblas_double_complex *A, rocblas_int lda, const rocblas_double_complex *B, rocblas_int ldb, const rocblas_double_complex *beta, rocblas_double_complex *C, rocblas_int ldc)

BLAS Level 3 API

syrkx performs one of the matrix-matrix operations for a symmetric rank-k update:

C := alpha*op( A )*op( B )^T + beta*C,

where  alpha and beta are scalars, op(A) and op(B) are n by k matrix, and
C is a symmetric n x n matrix stored as either upper or lower.

This routine should only be used when the caller can guarantee that the result of op( A )*op( B )^T will be symmetric.

op( A ) = A, op( B ) = B, and A and B are n by k if trans == rocblas_operation_none
op( A ) = A^T, op( B ) = B^T,  and A and B are k by n if trans == rocblas_operation_transpose
or for ssyrkx and dsyrkx when trans == rocblas_operation_conjugate_transpose

rocblas_operation_conjugate_transpose is not supported for complex types in csyrkx and zsyrkx.

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• uplo – [in] [rocblas_fill]

  • rocblas_fill_upper: C is an upper triangular matrix

  • rocblas_fill_lower: C is a lower triangular matrix

• trans – [in] [rocblas_operation]

  • rocblas_operation_transpose: op( A ) = A^T, op( B ) = B^T

  • rocblas_operation_none: op( A ) = A, op( B ) = B

  • rocblas_operation_conjugate_transpose: op( A ) = A^T, op( B ) = B^T

• n – [in] [rocblas_int] n specifies the number of rows and columns of C. n >= 0.

• k – [in] [rocblas_int] k specifies the number of columns of op(A) and op(B). k >= 0.

• alpha – [in] alpha specifies the scalar alpha. When alpha is zero then A is not referenced and A need not be set before entry.

• A – [in] pointer storing matrix A on the GPU. Matrix dimension is ( lda, k ) when if trans = rocblas_operation_none, otherwise (lda, n)

• lda – [in] [rocblas_int] lda specifies the first dimension of A.

  if trans = rocblas_operation_none,  lda >= max( 1, n ),
  otherwise lda >= max( 1, k ).
  

• B – [in] pointer storing matrix B on the GPU. Matrix dimension is ( ldb, k ) when if trans = rocblas_operation_none, otherwise (ldb, n)

• ldb – [in] [rocblas_int] ldb specifies the first dimension of B.

  if trans = rocblas_operation_none,  ldb >= max( 1, n ),
  otherwise ldb >= max( 1, k ).
  

• beta – [in] beta specifies the scalar beta. When beta is zero then C need not be set before entry.

• C – [in] pointer storing matrix C on the GPU. only the upper/lower triangular part is accessed.

• ldc – [in] [rocblas_int] ldc specifies the first dimension of C. ldc >= max( 1, n ).

rocblas_status rocblas_ssyrkx_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const float *alpha, const float *const A[], rocblas_int lda, const float *const B[], rocblas_int ldb, const float *beta, float *const C[], rocblas_int ldc, rocblas_int batch_count)

rocblas_status rocblas_dsyrkx_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const double *alpha, const double *const A[], rocblas_int lda, const double *const B[], rocblas_int ldb, const double *beta, double *const C[], rocblas_int ldc, rocblas_int batch_count)

rocblas_status rocblas_csyrkx_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const rocblas_float_complex *alpha, const rocblas_float_complex *const A[], rocblas_int lda, const rocblas_float_complex *const B[], rocblas_int ldb, const rocblas_float_complex *beta, rocblas_float_complex *const C[], rocblas_int ldc, rocblas_int batch_count)

rocblas_status rocblas_zsyrkx_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const rocblas_double_complex *alpha, const rocblas_double_complex *const A[], rocblas_int lda, const rocblas_double_complex *const B[], rocblas_int ldb, const rocblas_double_complex *beta, rocblas_double_complex *const C[], rocblas_int ldc, rocblas_int batch_count)

BLAS Level 3 API

syrkx_batched performs a batch of the matrix-matrix operations for a symmetric rank-k update:

C_i := alpha*op( A_i )*op( B_i )^T + beta*C_i,

where  alpha and beta are scalars, op(A_i) and op(B_i) are n by k matrix, and
C_i is a symmetric n x n matrix stored as either upper or lower.

This routine should only be used when the caller can guarantee that the result of op( A_i )*op( B_i )^T will be symmetric.

op( A_i ) = A_i, op( B_i ) = B_i, and A_i and B_i are n by k if trans == rocblas_operation_none
op( A_i ) = A_i^T, op( B_i ) = B_i^T,  and A_i and B_i are k by n if trans == rocblas_operation_transpose
or for ssyrkx_batched and dsyrkx_batched when trans == rocblas_operation_conjugate_transpose

rocblas_operation_conjugate_transpose is not supported for complex types in csyrkx_batched and zsyrkx_batched.

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• uplo – [in] [rocblas_fill]

  • rocblas_fill_upper: C_i is an upper triangular matrix

  • rocblas_fill_lower: C_i is a lower triangular matrix

• trans – [in] [rocblas_operation]

  • rocblas_operation_transpose: op( A_i ) = A_i^T, op( B_i ) = B_i^T

  • rocblas_operation_none: op( A_i ) = A_i, op( B_i ) = B_i

  • rocblas_operation_conjugate_transpose: op( A_i ) = A_i^T, op( B_i ) = B_i^T

• n – [in] [rocblas_int] n specifies the number of rows and columns of C_i. n >= 0.

• k – [in] [rocblas_int] k specifies the number of columns of op(A). k >= 0.

• alpha – [in] alpha specifies the scalar alpha. When alpha is zero then A is not referenced and A need not be set before entry.

• A – [in] device array of device pointers storing each matrix_i A of dimension (lda, k) when trans is rocblas_operation_none, otherwise of dimension (lda, n)

• lda – [in] [rocblas_int] lda specifies the first dimension of A_i.

  if trans = rocblas_operation_none,  lda >= max( 1, n ),
  otherwise lda >= max( 1, k ).
  

• B – [in] device array of device pointers storing each matrix_i B of dimension (ldb, k) when trans is rocblas_operation_none, otherwise of dimension (ldb, n)

• ldb – [in] [rocblas_int] ldb specifies the first dimension of B.

  if trans = rocblas_operation_none,  ldb >= max( 1, n ),
  otherwise ldb >= max( 1, k ).
  

• beta – [in] beta specifies the scalar beta. When beta is zero then C need not be set before entry.

• C – [in] device array of device pointers storing each matrix C_i on the GPU. only the upper/lower triangular part of each C_i is accessed.

• ldc – [in] [rocblas_int] ldc specifies the first dimension of C. ldc >= max( 1, n ).

• batch_count – [in] [rocblas_int] number of instances in the batch.

rocblas_status rocblas_ssyrkx_strided_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const float *alpha, const float *A, rocblas_int lda, rocblas_stride stride_A, const float *B, rocblas_int ldb, rocblas_stride stride_B, const float *beta, float *C, rocblas_int ldc, rocblas_stride stride_C, rocblas_int batch_count)

rocblas_status rocblas_dsyrkx_strided_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const double *alpha, const double *A, rocblas_int lda, rocblas_stride stride_A, const double *B, rocblas_int ldb, rocblas_stride stride_B, const double *beta, double *C, rocblas_int ldc, rocblas_stride stride_C, rocblas_int batch_count)

rocblas_status rocblas_csyrkx_strided_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const rocblas_float_complex *alpha, const rocblas_float_complex *A, rocblas_int lda, rocblas_stride stride_A, const rocblas_float_complex *B, rocblas_int ldb, rocblas_stride stride_B, const rocblas_float_complex *beta, rocblas_float_complex *C, rocblas_int ldc, rocblas_stride stride_C, rocblas_int batch_count)

rocblas_status rocblas_zsyrkx_strided_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const rocblas_double_complex *alpha, const rocblas_double_complex *A, rocblas_int lda, rocblas_stride stride_A, const rocblas_double_complex *B, rocblas_int ldb, rocblas_stride stride_B, const rocblas_double_complex *beta, rocblas_double_complex *C, rocblas_int ldc, rocblas_stride stride_C, rocblas_int batch_count)

BLAS Level 3 API

syrkx_strided_batched performs a batch of the matrix-matrix operations for a symmetric rank-k update:

C_i := alpha*op( A_i )*op( B_i )^T + beta*C_i,

where  alpha and beta are scalars, op(A_i) and op(B_i) are n by k matrix, and
C_i is a symmetric n x n matrix stored as either upper or lower.

This routine should only be used when the caller can guarantee that the result of op( A_i )*op( B_i )^T will be symmetric.

op( A_i ) = A_i, op( B_i ) = B_i, and A_i and B_i are n by k if trans == rocblas_operation_none
op( A_i ) = A_i^T, op( B_i ) = B_i^T,  and A_i and B_i are k by n if trans == rocblas_operation_transpose
or for ssyrkx_strided_batched and dsyrkx_strided_batched when trans == rocblas_operation_conjugate_transpose

rocblas_operation_conjugate_transpose is not supported for complex types in csyrkx_strided_batched and zsyrkx_strided_batched.

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• uplo – [in] [rocblas_fill]

  • rocblas_fill_upper: C_i is an upper triangular matrix

  • rocblas_fill_lower: C_i is a lower triangular matrix

• trans – [in] [rocblas_operation]

  • rocblas_operation_transpose: op( A_i ) = A_i^T, op( B_i ) = B_i^T

  • rocblas_operation_none: op( A_i ) = A_i, op( B_i ) = B_i

  • rocblas_operation_conjugate_transpose: op( A_i ) = A_i^T, op( B_i ) = B_i^T

• n – [in] [rocblas_int] n specifies the number of rows and columns of C_i. n >= 0.

• k – [in] [rocblas_int] k specifies the number of columns of op(A). k >= 0.

• alpha – [in] alpha specifies the scalar alpha. When alpha is zero then A is not referenced and A need not be set before entry.

• A – [in] Device pointer to the first matrix A_1 on the GPU of dimension (lda, k) when trans is rocblas_operation_none, otherwise of dimension (lda, n)

• lda – [in] [rocblas_int] lda specifies the first dimension of A_i.

  if trans = rocblas_operation_none,  lda >= max( 1, n ),
  otherwise lda >= max( 1, k ).
  

• stride_A – [in] [rocblas_stride] stride from the start of one matrix (A_i) and the next one (A_i+1).

• B – [in] Device pointer to the first matrix B_1 on the GPU of dimension (ldb, k) when trans is rocblas_operation_none, otherwise of dimension (ldb, n).

• ldb – [in] [rocblas_int] ldb specifies the first dimension of B_i.

  if trans = rocblas_operation_none,  ldb >= max( 1, n ),
  otherwise ldb >= max( 1, k ).
  

• stride_B – [in] [rocblas_stride] stride from the start of one matrix (B_i) and the next one (B_i+1).

• beta – [in] beta specifies the scalar beta. When beta is zero then C need not be set before entry.

• C – [in] Device pointer to the first matrix C_1 on the GPU. only the upper/lower triangular part of each C_i is accessed.

• ldc – [in] [rocblas_int] ldc specifies the first dimension of C. ldc >= max( 1, n ).

• stride_C – [inout] [rocblas_stride] stride from the start of one matrix (C_i) and the next one (C_i+1).

• batch_count – [in] [rocblas_int] number of instances in the batch.

rocblas_Xtrmm + batched, strided_batched

rocblas_status rocblas_strmm(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_operation transA, rocblas_diagonal diag, rocblas_int m, rocblas_int n, const float *alpha, const float *A, rocblas_int lda, const float *B, rocblas_int ldb, float *C, rocblas_int ldc)

rocblas_status rocblas_dtrmm(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_operation transA, rocblas_diagonal diag, rocblas_int m, rocblas_int n, const double *alpha, const double *A, rocblas_int lda, const double *B, rocblas_int ldb, double *C, rocblas_int ldc)

rocblas_status rocblas_ctrmm(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_operation transA, rocblas_diagonal diag, rocblas_int m, rocblas_int n, const rocblas_float_complex *alpha, const rocblas_float_complex *A, rocblas_int lda, const rocblas_float_complex *B, rocblas_int ldb, rocblas_float_complex *C, rocblas_int ldc)

rocblas_status rocblas_ztrmm(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_operation transA, rocblas_diagonal diag, rocblas_int m, rocblas_int n, const rocblas_double_complex *alpha, const rocblas_double_complex *A, rocblas_int lda, const rocblas_double_complex *B, rocblas_int ldb, rocblas_double_complex *C, rocblas_int ldc)

BLAS Level 3 API

trmm performs one of the matrix-matrix operations:

C := alpha*op( A )*B,   or
C := alpha*B*op( A ),

The Legacy BLAS in-place trmm functionality,

B := alpha*op( A )*B,   or
B := alpha*B*op( A ),

is available by setting pointer C equal to pointer B, and ldc equal to ldb.

alpha  is a scalar,  B  is an m by n matrix, C  is an m by n matrix,  A  is a unit, or
non-unit,  upper or lower triangular matrix  and  op( A )  is one  of

op( A ) = A     or
op( A ) = A^T   or
op( A ) = A^H.

When uplo == rocblas_fill_upper the  leading  k by k
upper triangular part of the array  A must contain the upper
triangular matrix and the strictly lower triangular part of
A is not referenced. Here k is m when side == rocblas_side_left
and is n when side == rocblas_side_right.

When uplo == rocblas_fill_lower the  leading  k by k
lower triangular part of the array  A must contain the lower
triangular matrix  and the strictly upper triangular part of
A is not referenced. Here k is m when  side == rocblas_side_left
and is n when side == rocblas_side_right.

Note that when  diag == rocblas_diagonal_unit  the diagonal elements of
A  are not referenced either,  but are assumed to be  unity.

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• side – [in] [rocblas_side] Specifies whether op(A) multiplies B from the left or right as follows:

  • rocblas_side_left: C := alpha*op( A )*B

  • rocblas_side_right: C := alpha*B*op( A )

• uplo – [in] [rocblas_fill] Specifies whether the matrix A is an upper or lower triangular matrix as follows:

  • rocblas_fill_upper: A is an upper triangular matrix.

  • rocblas_fill_lower: A is a lower triangular matrix.

• transA – [in] [rocblas_operation] Specifies the form of op(A) to be used in the matrix multiplication as follows:

  • rocblas_operation_none: op(A) = A

  • rocblas_operation_transpose: op(A) = A^T

  • rocblas_operation_conjugate_transpose: op(A) = A^H

• diag – [in] [rocblas_diagonal] Specifies whether or not A is unit triangular as follows:

  • rocblas_diagonal_unit: A is assumed to be unit triangular.

  • rocblas_diagonal_non_unit: A is not assumed to be unit triangular.

• m – [in] [rocblas_int] m specifies the number of rows of B. m >= 0.

• n – [in] [rocblas_int] n specifies the number of columns of B. n >= 0.

• alpha – [in] alpha specifies the scalar alpha. When alpha is zero then A is not referenced and B need not be set before entry.

• A – [in] Device pointer to matrix A on the GPU. A has dimension ( lda, k ), where k is m when side == rocblas_side_left and is n when side == rocblas_side_right.

  When uplo == rocblas_fill_upper the  leading  k by k
  upper triangular part of the array  A must contain the upper
  triangular matrix  and the strictly lower triangular part of
  A is not referenced.
  
  When uplo == rocblas_fill_lower the  leading  k by k
  lower triangular part of the array  A must contain the lower
  triangular matrix  and the strictly upper triangular part of
  A is not referenced.
  

  Note that when diag == rocblas_diagonal_unit the diagonal elements of A are not referenced either, but are assumed to be unity.

• lda – [in] [rocblas_int] lda specifies the first dimension of A.

  if side == rocblas_side_left,  lda >= max( 1, m ),
  if side == rocblas_side_right, lda >= max( 1, n ).
  

• B – [in] Device pointer to the matrix B on the GPU.

• ldb – [in] [rocblas_int] ldb specifies the first dimension of B. ldb >= max( 1, m ).

• C – [out] Device pointer to the matrix C on the GPU.

• ldc – [in] [rocblas_int] ldc specifies the first dimension of C. ldc >= max( 1, m). If B and C are pointers to the same matrix then ldc must equal ldb or rocblas_status_invalid_value will be returned.

rocblas_status rocblas_strmm_batched(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_operation transA, rocblas_diagonal diag, rocblas_int m, rocblas_int n, const float *alpha, const float *const A[], rocblas_int lda, const float *const B[], rocblas_int ldb, float *const C[], rocblas_int ldc, rocblas_int batch_count)

rocblas_status rocblas_dtrmm_batched(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_operation transA, rocblas_diagonal diag, rocblas_int m, rocblas_int n, const double *alpha, const double *const A[], rocblas_int lda, const double *const B[], rocblas_int ldb, double *const C[], rocblas_int ldc, rocblas_int batch_count)

rocblas_status rocblas_ctrmm_batched(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_operation transA, rocblas_diagonal diag, rocblas_int m, rocblas_int n, const rocblas_float_complex *alpha, const rocblas_float_complex *const A[], rocblas_int lda, const rocblas_float_complex *const B[], rocblas_int ldb, rocblas_float_complex *const C[], rocblas_int ldc, rocblas_int batch_count)

rocblas_status rocblas_ztrmm_batched(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_operation transA, rocblas_diagonal diag, rocblas_int m, rocblas_int n, const rocblas_double_complex *alpha, const rocblas_double_complex *const A[], rocblas_int lda, const rocblas_double_complex *const B[], rocblas_int ldb, rocblas_double_complex *const C[], rocblas_int ldc, rocblas_int batch_count)

BLAS Level 3 API

trmm_batched performs one of the matrix-matrix operations:

C_i := alpha*op( A_i )*B_i,   or
C_i := alpha*B_i*op( A_i )  for i = 0, 1, ... batch_count -1,

The Legacy BLAS in-place trmm_batched functionality,

B_i := alpha*op( A_i )*B_i,   or
B_i := alpha*B_i*op( A_i )  for i = 0, 1, ... batch_count -1,

is available by setting pointer C equal to pointer B and ldc equal to ldb.

alpha  is a scalar,  B_i  is an m by n matrix, C_i  is an m by n matrix,  A_i  is a unit, or
non-unit,  upper or lower triangular matrix  and  op( A_i )  is one  of

op( A_i ) = A_i     or
op( A_i ) = A_i^T   or
op( A_i ) = A_i^H.

When uplo == rocblas_fill_upper the  leading  k by k
upper triangular part of the array  A must contain the upper
triangular matrix and the strictly lower triangular part of
A is not referenced. Here k is m when side == rocblas_side_left
and is n when side == rocblas_side_right.

When uplo == rocblas_fill_lower the  leading  k by k
lower triangular part of the array  A must contain the lower
triangular matrix  and the strictly upper triangular part of
A is not referenced. Here k is m when  side == rocblas_side_left
and is n when side == rocblas_side_right.

Note that when  diag == rocblas_diagonal_unit  the diagonal elements of
A  are not referenced either,  but are assumed to be  unity.

When uplo == rocblas_fill_upper the leading k by k upper triangular part of the array A must contain the upper triangular matrix and the strictly lower triangular part of A is not referenced.

When uplo == rocblas_fill_lower the leading k by k lower triangular part of the array A must contain the lower triangular matrix and the strictly upper triangular part of A is not referenced.

Note that when diag == rocblas_diagonal_unit the diagonal elements of A_i are not referenced either, but are assumed to be unity.

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• side – [in] [rocblas_side] Specifies whether op(A_i) multiplies B_i from the left or right as follows:

  • rocblas_side_left: C_i := alpha*op( A_i )*B_i

  • rocblas_side_right: C_i := alpha*B_i*op( A_i )

• uplo – [in] [rocblas_fill] Specifies whether the matrix A is an upper or lower triangular matrix as follows:

  • rocblas_fill_upper: A is an upper triangular matrix.

  • rocblas_fill_lower: A is a lower triangular matrix.

• transA – [in] [rocblas_operation] Specifies the form of op(A_i) to be used in the matrix multiplication as follows:

  • rocblas_operation_none: op(A_i) = A_i

  • rocblas_operation_transpose: op(A_i) = A_i^T

  • rocblas_operation_conjugate_transpose: op(A_i) = A_i^H

• diag – [in] [rocblas_diagonal] Specifies whether or not A_i is unit triangular as follows:

  • rocblas_diagonal_unit: A_i is assumed to be unit triangular.

  • rocblas_diagonal_non_unit: A_i is not assumed to be unit triangular.

• m – [in] [rocblas_int] m specifies the number of rows of B_i. m >= 0.

• n – [in] [rocblas_int] n specifies the number of columns of B_i. n >= 0.

• alpha – [in] alpha specifies the scalar alpha. When alpha is zero then A_i is not referenced and B_i need not be set before entry.

• A – [in] Device array of device pointers storing each matrix A_i on the GPU. Each A_i is of dimension ( lda, k ), where k is m when side == rocblas_side_left and is n when side == rocblas_side_right.

• lda – [in] [rocblas_int] lda specifies the first dimension of A.

  if side == rocblas_side_left,  lda >= max( 1, m ),
  if side == rocblas_side_right, lda >= max( 1, n ).
  

• B – [in] device array of device pointers storing each matrix B_i on the GPU.

• ldb – [in] [rocblas_int] ldb specifies the first dimension of B_i. ldb >= max( 1, m ).

• C – [out] device array of device pointers storing each matrix C_i on the GPU.

• ldc – [in] [rocblas_int] ldc specifies the first dimension of C. ldc >= max( 1, m). If B and C are pointers to the same array of pointers then ldc must equal ldb or rocblas_status_invalid_value will be returned.

• batch_count – [in] [rocblas_int] number of instances i in the batch.

rocblas_status rocblas_strmm_strided_batched(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_operation transA, rocblas_diagonal diag, rocblas_int m, rocblas_int n, const float *alpha, const float *A, rocblas_int lda, rocblas_stride stride_A, const float *B, rocblas_int ldb, rocblas_stride stride_B, float *C, rocblas_int ldc, rocblas_stride stride_C, rocblas_int batch_count)

rocblas_status rocblas_dtrmm_strided_batched(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_operation transA, rocblas_diagonal diag, rocblas_int m, rocblas_int n, const double *alpha, const double *A, rocblas_int lda, rocblas_stride stride_A, const double *B, rocblas_int ldb, rocblas_stride stride_B, double *C, rocblas_int ldc, rocblas_stride stride_C, rocblas_int batch_count)

rocblas_status rocblas_ctrmm_strided_batched(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_operation transA, rocblas_diagonal diag, rocblas_int m, rocblas_int n, const rocblas_float_complex *alpha, const rocblas_float_complex *A, rocblas_int lda, rocblas_stride stride_A, const rocblas_float_complex *B, rocblas_int ldb, rocblas_stride stride_B, rocblas_float_complex *C, rocblas_int ldc, rocblas_stride stride_C, rocblas_int batch_count)

rocblas_status rocblas_ztrmm_strided_batched(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_operation transA, rocblas_diagonal diag, rocblas_int m, rocblas_int n, const rocblas_double_complex *alpha, const rocblas_double_complex *A, rocblas_int lda, rocblas_stride stride_A, const rocblas_double_complex *B, rocblas_int ldb, rocblas_stride stride_B, rocblas_double_complex *C, rocblas_int ldc, rocblas_stride stride_C, rocblas_int batch_count)

BLAS Level 3 API

trmm_strided_batched performs one of the matrix-matrix operations:

C_i := alpha*op( A_i )*B_i,   or
C_i := alpha*B_i*op( A_i )  for i = 0, 1, ... batch_count -1,

The Legacy BLAS in-place trmm_strided_batched functionality,

B_i := alpha*op( A_i )*B_i,   or
B_i := alpha*B_i*op( A_i )  for i = 0, 1, ... batch_count -1,

is available by setting pointer C equal to pointer B, ldc equal to ldb, and stride_C equal to stride_B.

alpha  is a scalar,  B_i  is an m by n matrix, C_i  is an m by n matrix,  A_i  is a unit, or
non-unit,  upper or lower triangular matrix  and  op( A_i )  is one  of

op( A_i ) = A_i   or
op( A_i ) = A_i^T   or
op( A_i ) = A_i^H.

When uplo == rocblas_fill_upper the  leading  k by k
upper triangular part of the array  A must contain the upper
triangular matrix and the strictly lower triangular part of
A is not referenced. Here k is m when side == rocblas_side_left
and is n when side == rocblas_side_right.

When uplo == rocblas_fill_lower the  leading  k by k
lower triangular part of the array  A must contain the lower
triangular matrix  and the strictly upper triangular part of
A is not referenced. Here k is m when  side == rocblas_side_left
and is n when side == rocblas_side_right.

Note that when  diag == rocblas_diagonal_unit  the diagonal elements of
A  are not referenced either,  but are assumed to be  unity.

When uplo == rocblas_fill_upper the leading k by k upper triangular part of the array A must contain the upper triangular matrix and the strictly lower triangular part of A is not referenced.

When uplo == rocblas_fill_lower the leading k by k lower triangular part of the array A must contain the lower triangular matrix and the strictly upper triangular part of A is not referenced.

Note that when diag == rocblas_diagonal_unit the diagonal elements of A_i are not referenced either, but are assumed to be unity.

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• side – [in] [rocblas_side] Specifies whether op(A_i) multiplies B_i from the left or right as follows:

  • rocblas_side_left: C_i := alpha*op( A_i )*B_i

  • rocblas_side_right: C_i := alpha*B_i*op( A_i )

• uplo – [in] [rocblas_fill] Specifies whether the matrix A is an upper or lower triangular matrix as follows:

  • rocblas_fill_upper: A is an upper triangular matrix.

  • rocblas_fill_lower: A is a lower triangular matrix.

• transA – [in] [rocblas_operation] Specifies the form of op(A_i) to be used in the matrix multiplication as follows:

  • rocblas_operation_none: op(A_i) = A_i

  • rocblas_operation_transpose: op(A_i) = A_i^T

  • rocblas_operation_conjugate_transpose: op(A_i) = A_i^H

• diag – [in] [rocblas_diagonal] Specifies whether or not A_i is unit triangular as follows:

  • rocblas_diagonal_unit: A_i is assumed to be unit triangular.

  • rocblas_diagonal_non_unit: A_i is not assumed to be unit triangular.

• m – [in] [rocblas_int] m specifies the number of rows of B_i. m >= 0.

• n – [in] [rocblas_int] n specifies the number of columns of B_i. n >= 0.

• alpha – [in] alpha specifies the scalar alpha. When alpha is zero then A_i is not referenced and B_i need not be set before entry.

• A – [in] Device pointer to the first matrix A_0 on the GPU. Each A_i is of dimension ( lda, k ), where k is m when side == rocblas_side_left and is n when side == rocblas_side_right.

• lda – [in] [rocblas_int] lda specifies the first dimension of A.

  if side == rocblas_side_left,  lda >= max( 1, m ),
  if side == rocblas_side_right, lda >= max( 1, n ).
  

• stride_A – [in] [rocblas_stride] stride from the start of one matrix (A_i) and the next one (A_i+1).

• B – [in] Device pointer to the first matrix B_0 on the GPU.

• ldb – [in] [rocblas_int] ldb specifies the first dimension of B_i. ldb >= max( 1, m ).

• stride_B – [in] [rocblas_stride] stride from the start of one matrix (B_i) and the next one (B_i+1).

• C – [out] Device pointer to the first matrix C_0 on the GPU.

• ldc – [in] [rocblas_int] ldc specifies the first dimension of C_i. ldc >= max( 1, m). If B and C pointers are to the same matrix then ldc must equal ldb or rocblas_status_invalid_size will be returned.

• stride_C – [in] [rocblas_stride] stride from the start of one matrix (C_i) and the next one (C_i+1). If B == C and ldb == ldc then stride_C should equal stride_B or behavior is undefined.

• batch_count – [in] [rocblas_int] number of instances i in the batch.

rocblas_Xtrsm + batched, strided_batched

rocblas_status rocblas_strsm(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_operation transA, rocblas_diagonal diag, rocblas_int m, rocblas_int n, const float *alpha, const float *A, rocblas_int lda, float *B, rocblas_int ldb)

rocblas_status rocblas_dtrsm(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_operation transA, rocblas_diagonal diag, rocblas_int m, rocblas_int n, const double *alpha, const double *A, rocblas_int lda, double *B, rocblas_int ldb)

rocblas_status rocblas_ctrsm(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_operation transA, rocblas_diagonal diag, rocblas_int m, rocblas_int n, const rocblas_float_complex *alpha, const rocblas_float_complex *A, rocblas_int lda, rocblas_float_complex *B, rocblas_int ldb)

rocblas_status rocblas_ztrsm(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_operation transA, rocblas_diagonal diag, rocblas_int m, rocblas_int n, const rocblas_double_complex *alpha, const rocblas_double_complex *A, rocblas_int lda, rocblas_double_complex *B, rocblas_int ldb)

BLAS Level 3 API

trsm solves:

op(A)*X = alpha*B or  X*op(A) = alpha*B,

where alpha is a scalar, X and B are m by n matrices,

A is triangular matrix and op(A) is one of

op( A ) = A   or   op( A ) = A^T   or   op( A ) = A^H.

The matrix X is overwritten on B.

Note about memory allocation: When trsm is launched with a k evenly divisible by the internal block size of 128, and is no larger than 10 of these blocks, the API takes advantage of utilizing pre-allocated memory found in the handle to increase overall performance. This memory can be managed by using the environment variable WORKBUF_TRSM_B_CHNK. When this variable is not set the device memory used for temporary storage will default to 1 MB and may result in chunking, which in turn may reduce performance. Under these circumstances it is recommended that WORKBUF_TRSM_B_CHNK be set to the desired chunk of right hand sides to be used at a time (where k is m when rocblas_side_left and is n when rocblas_side_right).

Although not widespread, some gemm kernels used by trsm may use atomic operations. See Atomic Operations in the API Reference Guide for more information.

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• side – [in] [rocblas_side]

  • rocblas_side_left: op(A)*X = alpha*B

  • rocblas_side_right: X*op(A) = alpha*B

• uplo – [in] [rocblas_fill]

  • rocblas_fill_upper: A is an upper triangular matrix.

  • rocblas_fill_lower: A is a lower triangular matrix.

• transA – [in] [rocblas_operation]

  • transB: op(A) = A.

  • rocblas_operation_transpose: op(A) = A^T

  • rocblas_operation_conjugate_transpose: op(A) = A^H

• diag – [in] [rocblas_diagonal]

  • rocblas_diagonal_unit: A is assumed to be unit triangular.

  • rocblas_diagonal_non_unit: A is not assumed to be unit triangular.

• m – [in] [rocblas_int] m specifies the number of rows of B. m >= 0.

• n – [in] [rocblas_int] n specifies the number of columns of B. n >= 0.

• alpha – [in] device pointer or host pointer specifying the scalar alpha. When alpha is &zero then A is not referenced and B need not be set before entry.

• A – [in] device pointer storing matrix A. of dimension ( lda, k ), where k is m when rocblas_side_left and is n when rocblas_side_right only the upper/lower triangular part is accessed.

• lda – [in] [rocblas_int] lda specifies the first dimension of A.

  if side = rocblas_side_left,  lda >= max( 1, m ),
  if side = rocblas_side_right, lda >= max( 1, n ).
  

• B – [inout] device pointer storing matrix B.

• ldb – [in] [rocblas_int] ldb specifies the first dimension of B. ldb >= max( 1, m ).

rocblas_status rocblas_strsm_batched(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_operation transA, rocblas_diagonal diag, rocblas_int m, rocblas_int n, const float *alpha, const float *const A[], rocblas_int lda, float *const B[], rocblas_int ldb, rocblas_int batch_count)

rocblas_status rocblas_dtrsm_batched(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_operation transA, rocblas_diagonal diag, rocblas_int m, rocblas_int n, const double *alpha, const double *const A[], rocblas_int lda, double *const B[], rocblas_int ldb, rocblas_int batch_count)

rocblas_status rocblas_ctrsm_batched(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_operation transA, rocblas_diagonal diag, rocblas_int m, rocblas_int n, const rocblas_float_complex *alpha, const rocblas_float_complex *const A[], rocblas_int lda, rocblas_float_complex *const B[], rocblas_int ldb, rocblas_int batch_count)

rocblas_status rocblas_ztrsm_batched(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_operation transA, rocblas_diagonal diag, rocblas_int m, rocblas_int n, const rocblas_double_complex *alpha, const rocblas_double_complex *const A[], rocblas_int lda, rocblas_double_complex *const B[], rocblas_int ldb, rocblas_int batch_count)

BLAS Level 3 API

trsm_batched performs the following batched operation:

op(A_i)*X_i = alpha*B_i or
X_i*op(A_i) = alpha*B_i, for i = 1, ..., batch_count,

where alpha is a scalar, X and B are batched m by n matrices,

A is triangular batched matrix and op(A) is one of

op( A ) = A   or
op( A ) = A^T   or
op( A ) = A^H.

Each matrix X_i is overwritten on B_i for i = 1, ..., batch_count.

Note about memory allocation: When trsm is launched with a k evenly divisible by the internal block size of 128, and is no larger than 10 of these blocks, the API takes advantage of utilizing pre-allocated memory found in the handle to increase overall performance. This memory can be managed by using the environment variable WORKBUF_TRSM_B_CHNK. When this variable is not set the device memory used for temporary storage will default to 1 MB and may result in chunking, which in turn may reduce performance. Under these circumstances it is recommended that WORKBUF_TRSM_B_CHNK be set to the desired chunk of right hand sides to be used at a time (where k is m when rocblas_side_left and is n when rocblas_side_right).

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• side – [in] [rocblas_side]

  • rocblas_side_left: op(A)*X = alpha*B

  • rocblas_side_right: X*op(A) = alpha*B

• uplo – [in] [rocblas_fill]

  • rocblas_fill_upper: each A_i is an upper triangular matrix.

  • rocblas_fill_lower: each A_i is a lower triangular matrix.

• transA – [in] [rocblas_operation]

  • transB: op(A) = A

  • rocblas_operation_transpose: op(A) = A^T

  • rocblas_operation_conjugate_transpose: op(A) = A^H

• diag – [in] [rocblas_diagonal]

  • rocblas_diagonal_unit: each A_i is assumed to be unit triangular.

  • rocblas_diagonal_non_unit: each A_i is not assumed to be unit triangular.

• m – [in] [rocblas_int] m specifies the number of rows of each B_i. m >= 0.

• n – [in] [rocblas_int] n specifies the number of columns of each B_i. n >= 0.

• alpha – [in] device pointer or host pointer specifying the scalar alpha. When alpha is &zero then A is not referenced and B need not be set before entry.

• A – [in] device array of device pointers storing each matrix A_i on the GPU. Matricies are of dimension ( lda, k ), where k is m when rocblas_side_left and is n when rocblas_side_right only the upper/lower triangular part is accessed.

• lda – [in] [rocblas_int] lda specifies the first dimension of each A_i.

  if side = rocblas_side_left,  lda >= max( 1, m ),
  if side = rocblas_side_right, lda >= max( 1, n ).
  

• B – [inout] device array of device pointers storing each matrix B_i on the GPU.

• ldb – [in] [rocblas_int] ldb specifies the first dimension of each B_i. ldb >= max( 1, m ).

• batch_count – [in] [rocblas_int] number of trsm operatons in the batch.

rocblas_status rocblas_strsm_strided_batched(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_operation transA, rocblas_diagonal diag, rocblas_int m, rocblas_int n, const float *alpha, const float *A, rocblas_int lda, rocblas_stride stride_a, float *B, rocblas_int ldb, rocblas_stride stride_b, rocblas_int batch_count)

rocblas_status rocblas_dtrsm_strided_batched(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_operation transA, rocblas_diagonal diag, rocblas_int m, rocblas_int n, const double *alpha, const double *A, rocblas_int lda, rocblas_stride stride_a, double *B, rocblas_int ldb, rocblas_stride stride_b, rocblas_int batch_count)

rocblas_status rocblas_ctrsm_strided_batched(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_operation transA, rocblas_diagonal diag, rocblas_int m, rocblas_int n, const rocblas_float_complex *alpha, const rocblas_float_complex *A, rocblas_int lda, rocblas_stride stride_a, rocblas_float_complex *B, rocblas_int ldb, rocblas_stride stride_b, rocblas_int batch_count)

rocblas_status rocblas_ztrsm_strided_batched(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_operation transA, rocblas_diagonal diag, rocblas_int m, rocblas_int n, const rocblas_double_complex *alpha, const rocblas_double_complex *A, rocblas_int lda, rocblas_stride stride_a, rocblas_double_complex *B, rocblas_int ldb, rocblas_stride stride_b, rocblas_int batch_count)

BLAS Level 3 API

trsm_srided_batched performs the following strided batched operation:

op(A_i)*X_i = alpha*B_i or
X_i*op(A_i) = alpha*B_i, for i = 1, ..., batch_count,

where alpha is a scalar, X and B are strided batched m by n matrices,

A is triangular strided batched matrix and op(A) is one of

op( A ) = A   or
op( A ) = A^T   or
op( A ) = A^H.

Each matrix X_i is overwritten on B_i for i = 1, ..., batch_count.

Note about memory allocation: When trsm is launched with a k evenly divisible by the internal block size of 128, and is no larger than 10 of these blocks, the API takes advantage of utilizing pre-allocated memory found in the handle to increase overall performance. This memory can be managed by using the environment variable WORKBUF_TRSM_B_CHNK. When this variable is not set the device memory used for temporary storage will default to 1 MB and may result in chunking, which in turn may reduce performance. Under these circumstances it is recommended that WORKBUF_TRSM_B_CHNK be set to the desired chunk of right hand sides to be used at a time (where k is m when rocblas_side_left and is n when rocblas_side_right).

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• side – [in] [rocblas_side]

  • rocblas_side_left: op(A)*X = alpha*B.

  • rocblas_side_right: X*op(A) = alpha*B.

• uplo – [in] [rocblas_fill]

  • rocblas_fill_upper: each A_i is an upper triangular matrix.

  • rocblas_fill_lower: each A_i is a lower triangular matrix.

• transA – [in] [rocblas_operation]

  • transB: op(A) = A.

  • rocblas_operation_transpose: op(A) = A^T.

  • rocblas_operation_conjugate_transpose: op(A) = A^H.

• diag – [in] [rocblas_diagonal]

  • rocblas_diagonal_unit: each A_i is assumed to be unit triangular.

  • rocblas_diagonal_non_unit: each A_i is not assumed to be unit triangular.

• m – [in] [rocblas_int] m specifies the number of rows of each B_i. m >= 0.

• n – [in] [rocblas_int] n specifies the number of columns of each B_i. n >= 0.

• alpha – [in] device pointer or host pointer specifying the scalar alpha. When alpha is &zero then A is not referenced and B need not be set before entry.

• A – [in] device pointer pointing to the first matrix A_1. of dimension ( lda, k ), where k is m when rocblas_side_left and is n when rocblas_side_right only the upper/lower triangular part is accessed.

• lda – [in] [rocblas_int] lda specifies the first dimension of each A_i.

  if side = rocblas_side_left,  lda >= max( 1, m ).
  if side = rocblas_side_right, lda >= max( 1, n ).
  

• stride_a – [in] [rocblas_stride] stride from the start of one A_i matrix to the next A_(i + 1).

• B – [inout] device pointer pointing to the first matrix B_1.

• ldb – [in] [rocblas_int] ldb specifies the first dimension of each B_i. ldb >= max( 1, m ).

• stride_b – [in] [rocblas_stride] stride from the start of one B_i matrix to the next B_(i + 1).

• batch_count – [in] [rocblas_int] number of trsm operatons in the batch.

rocblas_Xhemm + batched, strided_batched

rocblas_status rocblas_chemm(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_int m, rocblas_int n, const rocblas_float_complex *alpha, const rocblas_float_complex *A, rocblas_int lda, const rocblas_float_complex *B, rocblas_int ldb, const rocblas_float_complex *beta, rocblas_float_complex *C, rocblas_int ldc)

rocblas_status rocblas_zhemm(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_int m, rocblas_int n, const rocblas_double_complex *alpha, const rocblas_double_complex *A, rocblas_int lda, const rocblas_double_complex *B, rocblas_int ldb, const rocblas_double_complex *beta, rocblas_double_complex *C, rocblas_int ldc)

BLAS Level 3 API

hemm performs one of the matrix-matrix operations:

C := alpha*A*B + beta*C if side == rocblas_side_left,
C := alpha*B*A + beta*C if side == rocblas_side_right,

where alpha and beta are scalars, B and C are m by n matrices, and
A is a Hermitian matrix stored as either upper or lower.

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• side – [in] [rocblas_side]

  • rocblas_side_left: C := alpha*A*B + beta*C

  • rocblas_side_right: C := alpha*B*A + beta*C

• uplo – [in] [rocblas_fill]

  • rocblas_fill_upper: A is an upper triangular matrix

  • rocblas_fill_lower: A is a lower triangular matrix

• m – [in] [rocblas_int] m specifies the number of rows of B and C. m >= 0.

• n – [in] [rocblas_int] n specifies the number of columns of B and C. n >= 0.

• alpha – [in] alpha specifies the scalar alpha. When alpha is zero then A and B are not referenced.

• A – [in] pointer storing matrix A on the GPU.

  • A is m by m if side == rocblas_side_left

  • A is n by n if side == rocblas_side_right Only the upper/lower triangular part is accessed. The imaginary component of the diagonal elements is not used.

• lda – [in] [rocblas_int] lda specifies the first dimension of A.

  if side = rocblas_side_left,  lda >= max( 1, m ),
  otherwise lda >= max( 1, n ).
  

• B – [in] pointer storing matrix B on the GPU. Matrix dimension is m by n

• ldb – [in] [rocblas_int] ldb specifies the first dimension of B. ldb >= max( 1, m ).

• beta – [in] beta specifies the scalar beta. When beta is zero then C need not be set before entry.

• C – [in] pointer storing matrix C on the GPU. Matrix dimension is m by n

• ldc – [in] [rocblas_int] ldc specifies the first dimension of C. ldc >= max( 1, m ).

rocblas_status rocblas_chemm_batched(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_int m, rocblas_int n, const rocblas_float_complex *alpha, const rocblas_float_complex *const A[], rocblas_int lda, const rocblas_float_complex *const B[], rocblas_int ldb, const rocblas_float_complex *beta, rocblas_float_complex *const C[], rocblas_int ldc, rocblas_int batch_count)

rocblas_status rocblas_zhemm_batched(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_int m, rocblas_int n, const rocblas_double_complex *alpha, const rocblas_double_complex *const A[], rocblas_int lda, const rocblas_double_complex *const B[], rocblas_int ldb, const rocblas_double_complex *beta, rocblas_double_complex *const C[], rocblas_int ldc, rocblas_int batch_count)

BLAS Level 3 API

hemm_batched performs a batch of the matrix-matrix operations:

C_i := alpha*A_i*B_i + beta*C_i if side == rocblas_side_left,
C_i := alpha*B_i*A_i + beta*C_i if side == rocblas_side_right,

where alpha and beta are scalars, B_i and C_i are m by n matrices, and
A_i is a Hermitian matrix stored as either upper or lower.

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• side – [in] [rocblas_side]

  • rocblas_side_left: C_i := alpha*A_i*B_i + beta*C_i

  • rocblas_side_right: C_i := alpha*B_i*A_i + beta*C_i

• uplo – [in] [rocblas_fill]

  • rocblas_fill_upper: A_i is an upper triangular matrix

  • rocblas_fill_lower: A_i is a lower triangular matrix

• m – [in] [rocblas_int] m specifies the number of rows of B_i and C_i. m >= 0.

• n – [in] [rocblas_int] n specifies the number of columns of B_i and C_i. n >= 0.

• alpha – [in] alpha specifies the scalar alpha. When alpha is zero then A_i and B_i are not referenced.

• A – [in] device array of device pointers storing each matrix A_i on the GPU.

  • A_i is m by m if side == rocblas_side_left

  • A_i is n by n if side == rocblas_side_right Only the upper/lower triangular part is accessed. The imaginary component of the diagonal elements is not used.

• lda – [in] [rocblas_int] lda specifies the first dimension of A_i.

  if side = rocblas_side_left,  lda >= max( 1, m ),
  otherwise lda >= max( 1, n ).
  

• B – [in] device array of device pointers storing each matrix B_i on the GPU. Matrix dimension is m by n

• ldb – [in] [rocblas_int] ldb specifies the first dimension of B_i. ldb >= max( 1, m ).

• beta – [in] beta specifies the scalar beta. When beta is zero then C_i need not be set before entry.

• C – [in] device array of device pointers storing each matrix C_i on the GPU. Matrix dimension is m by n

• ldc – [in] [rocblas_int] ldc specifies the first dimension of C_i. ldc >= max( 1, m ).

• batch_count – [in] [rocblas_int] number of instances in the batch.

rocblas_status rocblas_chemm_strided_batched(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_int m, rocblas_int n, const rocblas_float_complex *alpha, const rocblas_float_complex *A, rocblas_int lda, rocblas_stride stride_A, const rocblas_float_complex *B, rocblas_int ldb, rocblas_stride stride_B, const rocblas_float_complex *beta, rocblas_float_complex *C, rocblas_int ldc, rocblas_stride stride_C, rocblas_int batch_count)

rocblas_status rocblas_zhemm_strided_batched(rocblas_handle handle, rocblas_side side, rocblas_fill uplo, rocblas_int m, rocblas_int n, const rocblas_double_complex *alpha, const rocblas_double_complex *A, rocblas_int lda, rocblas_stride stride_A, const rocblas_double_complex *B, rocblas_int ldb, rocblas_stride stride_B, const rocblas_double_complex *beta, rocblas_double_complex *C, rocblas_int ldc, rocblas_stride stride_C, rocblas_int batch_count)

BLAS Level 3 API

hemm_strided_batched performs a batch of the matrix-matrix operations:

C_i := alpha*A_i*B_i + beta*C_i if side == rocblas_side_left,
C_i := alpha*B_i*A_i + beta*C_i if side == rocblas_side_right,

where alpha and beta are scalars, B_i and C_i are m by n matrices, and
A_i is a Hermitian matrix stored as either upper or lower.

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• side – [in] [rocblas_side]

  • rocblas_side_left: C_i := alpha*A_i*B_i + beta*C_i

  • rocblas_side_right: C_i := alpha*B_i*A_i + beta*C_i

• uplo – [in] [rocblas_fill]

  • rocblas_fill_upper: A_i is an upper triangular matrix

  • rocblas_fill_lower: A_i is a lower triangular matrix

• m – [in] [rocblas_int] m specifies the number of rows of B_i and C_i. m >= 0.

• n – [in] [rocblas_int] n specifies the number of columns of B_i and C_i. n >= 0.

• alpha – [in] alpha specifies the scalar alpha. When alpha is zero then A_i and B_i are not referenced.

• A – [in] device pointer to first matrix A_1

  • A_i is m by m if side == rocblas_side_left

  • A_i is n by n if side == rocblas_side_right Only the upper/lower triangular part is accessed. The imaginary component of the diagonal elements is not used.

• lda – [in] [rocblas_int] lda specifies the first dimension of A_i.

  if side = rocblas_side_left,  lda >= max( 1, m ),
  otherwise lda >= max( 1, n ).
  

• stride_A – [in] [rocblas_stride] stride from the start of one matrix (A_i) and the next one (A_i+1).

• B – [in] device pointer to first matrix B_1 of dimension (ldb, n) on the GPU

• ldb – [in] [rocblas_int] ldb specifies the first dimension of B_i.

  if side = rocblas_operation_none,  ldb >= max( 1, m ),
  otherwise ldb >= max( 1, n ).
  

• stride_B – [in] [rocblas_stride] stride from the start of one matrix (B_i) and the next one (B_i+1).

• beta – [in] beta specifies the scalar beta. When beta is zero then C need not be set before entry.

• C – [in] device pointer to first matrix C_1 of dimension (ldc, n) on the GPU.

• ldc – [in] [rocblas_int] ldc specifies the first dimension of C. ldc >= max( 1, m ).

• stride_C – [inout] [rocblas_stride] stride from the start of one matrix (C_i) and the next one (C_i+1).

• batch_count – [in] [rocblas_int] number of instances in the batch.

rocblas_Xherk + batched, strided_batched

rocblas_status rocblas_cherk(rocblas_handle handle, rocblas_fill uplo, rocblas_operation transA, rocblas_int n, rocblas_int k, const float *alpha, const rocblas_float_complex *A, rocblas_int lda, const float *beta, rocblas_float_complex *C, rocblas_int ldc)

rocblas_status rocblas_zherk(rocblas_handle handle, rocblas_fill uplo, rocblas_operation transA, rocblas_int n, rocblas_int k, const double *alpha, const rocblas_double_complex *A, rocblas_int lda, const double *beta, rocblas_double_complex *C, rocblas_int ldc)

BLAS Level 3 API

herk performs one of the matrix-matrix operations for a Hermitian rank-k update:

C := alpha*op( A )*op( A )^H + beta*C,

where  alpha and beta are scalars, op(A) is an n by k matrix, and
C is a n x n Hermitian matrix stored as either upper or lower.

op( A ) = A, and A is n by k if transA == rocblas_operation_none
op( A ) = A^H and A is k by n if transA == rocblas_operation_conjugate_transpose

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• uplo – [in] [rocblas_fill]

  • rocblas_fill_upper: C is an upper triangular matrix

  • rocblas_fill_lower: C is a lower triangular matrix

• transA – [in] [rocblas_operation]

  • rocblas_operation_conjugate_transpose: op(A) = A^H

  • rocblas_operation_none: op(A) = A

• n – [in] [rocblas_int] n specifies the number of rows and columns of C. n >= 0.

• k – [in] [rocblas_int] k specifies the number of columns of op(A). k >= 0.

• alpha – [in] alpha specifies the scalar alpha. When alpha is zero then A is not referenced and A need not be set before entry.

• A – [in] pointer storing matrix A on the GPU. Matrix dimension is ( lda, k ) when if transA = rocblas_operation_none, otherwise (lda, n)

• lda – [in] [rocblas_int] lda specifies the first dimension of A.

  if transA = rocblas_operation_none,  lda >= max( 1, n ),
  otherwise lda >= max( 1, k ).
  

• beta – [in] beta specifies the scalar beta. When beta is zero then C need not be set before entry.

• C – [in] pointer storing matrix C on the GPU. The imaginary component of the diagonal elements are not used but are set to zero unless quick return. only the upper/lower triangular part is accessed.

• ldc – [in] [rocblas_int] ldc specifies the first dimension of C. ldc >= max( 1, n ).

rocblas_status rocblas_cherk_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation transA, rocblas_int n, rocblas_int k, const float *alpha, const rocblas_float_complex *const A[], rocblas_int lda, const float *beta, rocblas_float_complex *const C[], rocblas_int ldc, rocblas_int batch_count)

rocblas_status rocblas_zherk_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation transA, rocblas_int n, rocblas_int k, const double *alpha, const rocblas_double_complex *const A[], rocblas_int lda, const double *beta, rocblas_double_complex *const C[], rocblas_int ldc, rocblas_int batch_count)

BLAS Level 3 API

herk_batched performs a batch of the matrix-matrix operations for a Hermitian rank-k update:

C_i := alpha*op( A_i )*op( A_i )^H + beta*C_i,

where  alpha and beta are scalars, op(A) is an n by k matrix, and
C_i is a n x n Hermitian matrix stored as either upper or lower.

op( A_i ) = A_i, and A_i is n by k if transA == rocblas_operation_none
op( A_i ) = A_i^H and A_i is k by n if transA == rocblas_operation_conjugate_transpose

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• uplo – [in] [rocblas_fill]

  • rocblas_fill_upper: C_i is an upper triangular matrix

  • rocblas_fill_lower: C_i is a lower triangular matrix

• transA – [in] [rocblas_operation]

  • rocblas_operation_conjugate_transpose: op(A) = A^H

  • rocblas_operation_none: op(A) = A

• n – [in] [rocblas_int] n specifies the number of rows and columns of C_i. n >= 0.

• k – [in] [rocblas_int] k specifies the number of columns of op(A). k >= 0.

• alpha – [in] alpha specifies the scalar alpha. When alpha is zero then A is not referenced and A need not be set before entry.

• A – [in] device array of device pointers storing each matrix_i A of dimension (lda, k) when transA is rocblas_operation_none, otherwise of dimension (lda, n).

• lda – [in] [rocblas_int] lda specifies the first dimension of A_i.

  if transA = rocblas_operation_none,  lda >= max( 1, n ),
  otherwise lda >= max( 1, k ).
  

• beta – [in] beta specifies the scalar beta. When beta is zero then C need not be set before entry.

• C – [in] device array of device pointers storing each matrix C_i on the GPU. The imaginary component of the diagonal elements are not used but are set to zero unless quick return. only the upper/lower triangular part of each C_i is accessed.

• ldc – [in] [rocblas_int] ldc specifies the first dimension of C. ldc >= max( 1, n ).

• batch_count – [in] [rocblas_int] number of instances in the batch.

rocblas_status rocblas_cherk_strided_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation transA, rocblas_int n, rocblas_int k, const float *alpha, const rocblas_float_complex *A, rocblas_int lda, rocblas_stride stride_A, const float *beta, rocblas_float_complex *C, rocblas_int ldc, rocblas_stride stride_C, rocblas_int batch_count)

rocblas_status rocblas_zherk_strided_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation transA, rocblas_int n, rocblas_int k, const double *alpha, const rocblas_double_complex *A, rocblas_int lda, rocblas_stride stride_A, const double *beta, rocblas_double_complex *C, rocblas_int ldc, rocblas_stride stride_C, rocblas_int batch_count)

BLAS Level 3 API

herk_strided_batched performs a batch of the matrix-matrix operations for a Hermitian rank-k update:

C_i := alpha*op( A_i )*op( A_i )^H + beta*C_i,

where  alpha and beta are scalars, op(A) is an n by k matrix, and
C_i is a n x n Hermitian matrix stored as either upper or lower.

op( A_i ) = A_i, and A_i is n by k if transA == rocblas_operation_none
op( A_i ) = A_i^H and A_i is k by n if transA == rocblas_operation_conjugate_transpose

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• uplo – [in] [rocblas_fill]

  • rocblas_fill_upper: C_i is an upper triangular matrix

  • rocblas_fill_lower: C_i is a lower triangular matrix

• transA – [in] [rocblas_operation]

  • rocblas_operation_conjugate_transpose: op(A) = A^H

  • rocblas_operation_none: op(A) = A

• n – [in] [rocblas_int] n specifies the number of rows and columns of C_i. n >= 0.

• k – [in] [rocblas_int] k specifies the number of columns of op(A). k >= 0.

• alpha – [in] alpha specifies the scalar alpha. When alpha is zero then A is not referenced and A need not be set before entry.

• A – [in] Device pointer to the first matrix A_1 on the GPU of dimension (lda, k) when transA is rocblas_operation_none, otherwise of dimension (lda, n)

• lda – [in] [rocblas_int] lda specifies the first dimension of A_i.

  if transA = rocblas_operation_none,  lda >= max( 1, n ),
  otherwise lda >= max( 1, k ).
  

• stride_A – [in] [rocblas_stride] stride from the start of one matrix (A_i) and the next one (A_i+1).

• beta – [in] beta specifies the scalar beta. When beta is zero then C need not be set before entry.

• C – [in] Device pointer to the first matrix C_1 on the GPU. The imaginary component of the diagonal elements are not used but are set to zero unless quick return. only the upper/lower triangular part of each C_i is accessed.

• ldc – [in] [rocblas_int] ldc specifies the first dimension of C. ldc >= max( 1, n ).

• stride_C – [inout] [rocblas_stride] stride from the start of one matrix (C_i) and the next one (C_i+1).

• batch_count – [in] [rocblas_int] number of instances in the batch.

rocblas_Xher2k + batched, strided_batched

rocblas_status rocblas_cher2k(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const rocblas_float_complex *alpha, const rocblas_float_complex *A, rocblas_int lda, const rocblas_float_complex *B, rocblas_int ldb, const float *beta, rocblas_float_complex *C, rocblas_int ldc)

rocblas_status rocblas_zher2k(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const rocblas_double_complex *alpha, const rocblas_double_complex *A, rocblas_int lda, const rocblas_double_complex *B, rocblas_int ldb, const double *beta, rocblas_double_complex *C, rocblas_int ldc)

BLAS Level 3 API

her2k performs one of the matrix-matrix operations for a Hermitian rank-2k update:

C := alpha*op( A )*op( B )^H + conj(alpha)*op( B )*op( A )^H + beta*C,

where  alpha and beta are scalars, op(A) and op(B) are n by k matrices, and
C is a n x n Hermitian matrix stored as either upper or lower.

op( A ) = A, op( B ) = B, and A and B are n by k if trans == rocblas_operation_none
op( A ) = A^H, op( B ) = B^H,  and A and B are k by n if trans == rocblas_operation_conjugate_transpose

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• uplo – [in] [rocblas_fill]

  • rocblas_fill_upper: C is an upper triangular matrix

  • rocblas_fill_lower: C is a lower triangular matrix

• trans – [in] [rocblas_operation]

  • rocblas_operation_conjugate_transpose: op( A ) = A^H, op( B ) = B^H

  • rocblas_operation_none: op( A ) = A, op( B ) = B

• n – [in] [rocblas_int] n specifies the number of rows and columns of C. n >= 0.

• k – [in] [rocblas_int] k specifies the number of columns of op(A). k >= 0.

• alpha – [in] alpha specifies the scalar alpha. When alpha is zero then A is not referenced and A need not be set before entry.

• A – [in] pointer storing matrix A on the GPU. Matrix dimension is ( lda, k ) when if trans = rocblas_operation_none, otherwise (lda, n)

• lda – [in] [rocblas_int] lda specifies the first dimension of A.

  if trans = rocblas_operation_none,  lda >= max( 1, n ),
  otherwise lda >= max( 1, k ).
  

• B – [in] pointer storing matrix B on the GPU. Matrix dimension is ( ldb, k ) when if trans = rocblas_operation_none, otherwise (ldb, n)

• ldb – [in] [rocblas_int] ldb specifies the first dimension of B.

  if trans = rocblas_operation_none,  ldb >= max( 1, n ),
  otherwise ldb >= max( 1, k ).
  

• beta – [in] beta specifies the scalar beta. When beta is zero then C need not be set before entry.

• C – [in] pointer storing matrix C on the GPU. The imaginary component of the diagonal elements are not used but are set to zero unless quick return. only the upper/lower triangular part is accessed.

• ldc – [in] [rocblas_int] ldc specifies the first dimension of C. ldc >= max( 1, n ).

rocblas_status rocblas_cher2k_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const rocblas_float_complex *alpha, const rocblas_float_complex *const A[], rocblas_int lda, const rocblas_float_complex *const B[], rocblas_int ldb, const float *beta, rocblas_float_complex *const C[], rocblas_int ldc, rocblas_int batch_count)

rocblas_status rocblas_zher2k_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const rocblas_double_complex *alpha, const rocblas_double_complex *const A[], rocblas_int lda, const rocblas_double_complex *const B[], rocblas_int ldb, const double *beta, rocblas_double_complex *const C[], rocblas_int ldc, rocblas_int batch_count)

BLAS Level 3 API

her2k_batched performs a batch of the matrix-matrix operations for a Hermitian rank-2k update:

C_i := alpha*op( A_i )*op( B_i )^H + conj(alpha)*op( B_i )*op( A_i )^H + beta*C_i,

where  alpha and beta are scalars, op(A_i) and op(B_i) are n by k matrices, and
C_i is a n x n Hermitian matrix stored as either upper or lower.

op( A_i ) = A_i, op( B_i ) = B_i, and A_i and B_i are n by k if trans == rocblas_operation_none
op( A_i ) = A_i^H, op( B_i ) = B_i^H,  and A_i and B_i are k by n if trans == rocblas_operation_conjugate_transpose

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• uplo – [in] [rocblas_fill]

  • rocblas_fill_upper: C_i is an upper triangular matrix

  • rocblas_fill_lower: C_i is a lower triangular matrix

• trans – [in] [rocblas_operation]

  • rocblas_operation_conjugate_transpose: op(A) = A^H

  • rocblas_operation_none: op(A) = A

• n – [in] [rocblas_int] n specifies the number of rows and columns of C_i. n >= 0.

• k – [in] [rocblas_int] k specifies the number of columns of op(A). k >= 0.

• alpha – [in] alpha specifies the scalar alpha. When alpha is zero then A is not referenced and A need not be set before entry.

• A – [in] device array of device pointers storing each matrix_i A of dimension (lda, k) when trans is rocblas_operation_none, otherwise of dimension (lda, n).

• lda – [in] [rocblas_int] lda specifies the first dimension of A_i.

  if trans = rocblas_operation_none,  lda >= max( 1, n ),
  otherwise lda >= max( 1, k ).
  

• B – [in] device array of device pointers storing each matrix_i B of dimension (ldb, k) when trans is rocblas_operation_none, otherwise of dimension (ldb, n).

• ldb – [in] [rocblas_int] ldb specifies the first dimension of B_i.

  if trans = rocblas_operation_none,  ldb >= max( 1, n ),
  otherwise ldb >= max( 1, k ).
  

• beta – [in] beta specifies the scalar beta. When beta is zero then C need not be set before entry.

• C – [in] device array of device pointers storing each matrix C_i on the GPU. The imaginary component of the diagonal elements are not used but are set to zero unless quick return. only the upper/lower triangular part of each C_i is accessed.

• ldc – [in] [rocblas_int] ldc specifies the first dimension of C. ldc >= max( 1, n ).

• batch_count – [in] [rocblas_int] number of instances in the batch.

rocblas_status rocblas_cher2k_strided_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const rocblas_float_complex *alpha, const rocblas_float_complex *A, rocblas_int lda, rocblas_stride stride_A, const rocblas_float_complex *B, rocblas_int ldb, rocblas_stride stride_B, const float *beta, rocblas_float_complex *C, rocblas_int ldc, rocblas_stride stride_C, rocblas_int batch_count)

rocblas_status rocblas_zher2k_strided_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const rocblas_double_complex *alpha, const rocblas_double_complex *A, rocblas_int lda, rocblas_stride stride_A, const rocblas_double_complex *B, rocblas_int ldb, rocblas_stride stride_B, const double *beta, rocblas_double_complex *C, rocblas_int ldc, rocblas_stride stride_C, rocblas_int batch_count)

BLAS Level 3 API

her2k_strided_batched performs a batch of the matrix-matrix operations for a Hermitian rank-2k update:

C_i := alpha*op( A_i )*op( B_i )^H + conj(alpha)*op( B_i )*op( A_i )^H + beta*C_i,

where  alpha and beta are scalars, op(A_i) and op(B_i) are n by k matrices, and
C_i is a n x n Hermitian matrix stored as either upper or lower.

op( A_i ) = A_i, op( B_i ) = B_i, and A_i and B_i are n by k if trans == rocblas_operation_none
op( A_i ) = A_i^H, op( B_i ) = B_i^H,  and A_i and B_i are k by n if trans == rocblas_operation_conjugate_transpose

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• uplo – [in] [rocblas_fill]

  • rocblas_fill_upper: C_i is an upper triangular matrix

  • rocblas_fill_lower: C_i is a lower triangular matrix

• trans – [in] [rocblas_operation]

  • rocblas_operation_conjugate_transpose: op( A_i ) = A_i^H, op( B_i ) = B_i^H

  • rocblas_operation_none: op( A_i ) = A_i, op( B_i ) = B_i

• n – [in] [rocblas_int] n specifies the number of rows and columns of C_i. n >= 0.

• k – [in] [rocblas_int] k specifies the number of columns of op(A). k >= 0.

• alpha – [in] alpha specifies the scalar alpha. When alpha is zero then A is not referenced and A need not be set before entry.

• A – [in] Device pointer to the first matrix A_1 on the GPU of dimension (lda, k) when trans is rocblas_operation_none, otherwise of dimension (lda, n).

• lda – [in] [rocblas_int] lda specifies the first dimension of A_i.

  if trans = rocblas_operation_none,  lda >= max( 1, n ),
  otherwise lda >= max( 1, k ).
  

• stride_A – [in] [rocblas_stride] stride from the start of one matrix (A_i) and the next one (A_i+1).

• B – [in] Device pointer to the first matrix B_1 on the GPU of dimension (ldb, k) when trans is rocblas_operation_none, otherwise of dimension (ldb, n).

• ldb – [in] [rocblas_int] ldb specifies the first dimension of B_i.

  if trans = rocblas_operation_none,  ldb >= max( 1, n ),
  otherwise ldb >= max( 1, k ).
  

• stride_B – [in] [rocblas_stride] stride from the start of one matrix (B_i) and the next one (B_i+1).

• beta – [in] beta specifies the scalar beta. When beta is zero then C need not be set before entry.

• C – [in] Device pointer to the first matrix C_1 on the GPU. The imaginary component of the diagonal elements are not used but are set to zero unless quick return. only the upper/lower triangular part of each C_i is accessed.

• ldc – [in] [rocblas_int] ldc specifies the first dimension of C. ldc >= max( 1, n ).

• stride_C – [inout] [rocblas_stride] stride from the start of one matrix (C_i) and the next one (C_i+1).

• batch_count – [in] [rocblas_int] number of instances in the batch.

rocblas_Xherkx + batched, strided_batched

rocblas_status rocblas_cherkx(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const rocblas_float_complex *alpha, const rocblas_float_complex *A, rocblas_int lda, const rocblas_float_complex *B, rocblas_int ldb, const float *beta, rocblas_float_complex *C, rocblas_int ldc)

rocblas_status rocblas_zherkx(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const rocblas_double_complex *alpha, const rocblas_double_complex *A, rocblas_int lda, const rocblas_double_complex *B, rocblas_int ldb, const double *beta, rocblas_double_complex *C, rocblas_int ldc)

BLAS Level 3 API

herkx performs one of the matrix-matrix operations for a Hermitian rank-k update:

C := alpha*op( A )*op( B )^H + beta*C,

where  alpha and beta are scalars, op(A) and op(B) are n by k matrices, and
C is a n x n Hermitian matrix stored as either upper or lower.

This routine should only be used when the caller can guarantee that the result of op( A )*op( B )^T will be Hermitian.

op( A ) = A, op( B ) = B, and A and B are n by k if trans == rocblas_operation_none
op( A ) = A^H, op( B ) = B^H,  and A and B are k by n if trans == rocblas_operation_conjugate_transpose

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• uplo – [in] [rocblas_fill]

  • rocblas_fill_upper: C is an upper triangular matrix

  • rocblas_fill_lower: C is a lower triangular matrix

• trans – [in] [rocblas_operation]

  • rocblas_operation_conjugate_transpose: op( A ) = A^H, op( B ) = B^H

  • rocblas_operation_none: op( A ) = A, op( B ) = B

• n – [in] [rocblas_int] n specifies the number of rows and columns of C. n >= 0.

• k – [in] [rocblas_int] k specifies the number of columns of op(A). k >= 0.

• alpha – [in] alpha specifies the scalar alpha. When alpha is zero then A is not referenced and A need not be set before entry.

• A – [in] pointer storing matrix A on the GPU. Matrix dimension is ( lda, k ) when if trans = rocblas_operation_none, otherwise (lda, n)

• lda – [in] [rocblas_int] lda specifies the first dimension of A.

  if trans = rocblas_operation_none,  lda >= max( 1, n ),
  otherwise lda >= max( 1, k ).
  

• B – [in] pointer storing matrix B on the GPU. Matrix dimension is ( ldb, k ) when if trans = rocblas_operation_none, otherwise (ldb, n)

• ldb – [in] [rocblas_int] ldb specifies the first dimension of B.

  if trans = rocblas_operation_none,  ldb >= max( 1, n ),
  otherwise ldb >= max( 1, k ).
  

• beta – [in] beta specifies the scalar beta. When beta is zero then C need not be set before entry.

• C – [in] pointer storing matrix C on the GPU. The imaginary component of the diagonal elements are not used but are set to zero unless quick return. only the upper/lower triangular part is accessed.

• ldc – [in] [rocblas_int] ldc specifies the first dimension of C. ldc >= max( 1, n ).

rocblas_status rocblas_cherkx_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const rocblas_float_complex *alpha, const rocblas_float_complex *const A[], rocblas_int lda, const rocblas_float_complex *const B[], rocblas_int ldb, const float *beta, rocblas_float_complex *const C[], rocblas_int ldc, rocblas_int batch_count)

rocblas_status rocblas_zherkx_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const rocblas_double_complex *alpha, const rocblas_double_complex *const A[], rocblas_int lda, const rocblas_double_complex *const B[], rocblas_int ldb, const double *beta, rocblas_double_complex *const C[], rocblas_int ldc, rocblas_int batch_count)

BLAS Level 3 API

herkx_batched performs a batch of the matrix-matrix operations for a Hermitian rank-k update:

C_i := alpha*op( A_i )*op( B_i )^H + beta*C_i,

where  alpha and beta are scalars, op(A_i) and op(B_i) are n by k matrices, and
C_i is a n x n Hermitian matrix stored as either upper or lower.

This routine should only be used when the caller can guarantee that the result of op( A )*op( B )^T will be Hermitian.

op( A_i ) = A_i, op( B_i ) = B_i, and A_i and B_i are n by k if trans == rocblas_operation_none
op( A_i ) = A_i^H, op( B_i ) = B_i^H,  and A_i and B_i are k by n if trans == rocblas_operation_conjugate_transpose

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• uplo – [in] [rocblas_fill]

  • rocblas_fill_upper: C_i is an upper triangular matrix

  • rocblas_fill_lower: C_i is a lower triangular matrix

• trans – [in] [rocblas_operation]

  • rocblas_operation_conjugate_transpose: op(A) = A^H

  • rocblas_operation_none: op(A) = A

• n – [in] [rocblas_int] n specifies the number of rows and columns of C_i. n >= 0.

• k – [in] [rocblas_int] k specifies the number of columns of op(A). k >= 0.

• alpha – [in] alpha specifies the scalar alpha. When alpha is zero then A is not referenced and A need not be set before entry.

• A – [in] device array of device pointers storing each matrix_i A of dimension (lda, k) when trans is rocblas_operation_none, otherwise of dimension (lda, n)

• lda – [in] [rocblas_int] lda specifies the first dimension of A_i.

  if trans = rocblas_operation_none,  lda >= max( 1, n ),
  otherwise lda >= max( 1, k ).
  

• B – [in] device array of device pointers storing each matrix_i B of dimension (ldb, k) when trans is rocblas_operation_none, otherwise of dimension (ldb, n)

• ldb – [in] [rocblas_int] ldb specifies the first dimension of B_i.

  if trans = rocblas_operation_none,  ldb >= max( 1, n ),
  otherwise ldb >= max( 1, k ).
  

• beta – [in] beta specifies the scalar beta. When beta is zero then C need not be set before entry.

• C – [in] device array of device pointers storing each matrix C_i on the GPU. The imaginary component of the diagonal elements are not used but are set to zero unless quick return. only the upper/lower triangular part of each C_i is accessed.

• ldc – [in] [rocblas_int] ldc specifies the first dimension of C. ldc >= max( 1, n ).

• batch_count – [in] [rocblas_int] number of instances in the batch.

rocblas_status rocblas_cherkx_strided_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const rocblas_float_complex *alpha, const rocblas_float_complex *A, rocblas_int lda, rocblas_stride stride_A, const rocblas_float_complex *B, rocblas_int ldb, rocblas_stride stride_B, const float *beta, rocblas_float_complex *C, rocblas_int ldc, rocblas_stride stride_C, rocblas_int batch_count)

rocblas_status rocblas_zherkx_strided_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_operation trans, rocblas_int n, rocblas_int k, const rocblas_double_complex *alpha, const rocblas_double_complex *A, rocblas_int lda, rocblas_stride stride_A, const rocblas_double_complex *B, rocblas_int ldb, rocblas_stride stride_B, const double *beta, rocblas_double_complex *C, rocblas_int ldc, rocblas_stride stride_C, rocblas_int batch_count)

BLAS Level 3 API

herkx_strided_batched performs a batch of the matrix-matrix operations for a Hermitian rank-k update:

C_i := alpha*op( A_i )*op( B_i )^H + beta*C_i,

where  alpha and beta are scalars, op(A_i) and op(B_i) are n by k matrices, and
C_i is a n x n Hermitian matrix stored as either upper or lower.

This routine should only be used when the caller can guarantee that the result of op( A )*op( B )^T will be Hermitian.

op( A_i ) = A_i, op( B_i ) = B_i, and A_i and B_i are n by k if trans == rocblas_operation_none
op( A_i ) = A_i^H, op( B_i ) = B_i^H,  and A_i and B_i are k by n if trans == rocblas_operation_conjugate_transpose

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• uplo – [in] [rocblas_fill]

  • rocblas_fill_upper: C_i is an upper triangular matrix

  • rocblas_fill_lower: C_i is a lower triangular matrix

• trans – [in] [rocblas_operation]

  • rocblas_operation_conjugate_transpose: op( A_i ) = A_i^H, op( B_i ) = B_i^H

  • rocblas_operation_none: op( A_i ) = A_i, op( B_i ) = B_i

• n – [in] [rocblas_int] n specifies the number of rows and columns of C_i. n >= 0.

• k – [in] [rocblas_int] k specifies the number of columns of op(A). k >= 0.

• alpha – [in] alpha specifies the scalar alpha. When alpha is zero then A is not referenced and A need not be set before entry.

• A – [in] Device pointer to the first matrix A_1 on the GPU of dimension (lda, k) when trans is rocblas_operation_none, otherwise of dimension (lda, n).

• lda – [in] [rocblas_int] lda specifies the first dimension of A_i.

  if trans = rocblas_operation_none,  lda >= max( 1, n ),
  otherwise lda >= max( 1, k ).
  

• stride_A – [in] [rocblas_stride] stride from the start of one matrix (A_i) and the next one (A_i+1)

• B – [in] Device pointer to the first matrix B_1 on the GPU of dimension (ldb, k) when trans is rocblas_operation_none, otherwise of dimension (ldb, n).

• ldb – [in] [rocblas_int] ldb specifies the first dimension of B_i.

  if trans = rocblas_operation_none,  ldb >= max( 1, n ),
  otherwise ldb >= max( 1, k ).
  

• stride_B – [in] [rocblas_stride] stride from the start of one matrix (B_i) and the next one (B_i+1)

• beta – [in] beta specifies the scalar beta. When beta is zero then C need not be set before entry.

• C – [in] Device pointer to the first matrix C_1 on the GPU. The imaginary component of the diagonal elements are not used but are set to zero unless quick return. only the upper/lower triangular part of each C_i is accessed.

• ldc – [in] [rocblas_int] ldc specifies the first dimension of C. ldc >= max( 1, n ).

• stride_C – [inout] [rocblas_stride] stride from the start of one matrix (C_i) and the next one (C_i+1).

• batch_count – [in] [rocblas_int] number of instances in the batch.

rocblas_Xtrtri + batched, strided_batched

rocblas_status rocblas_strtri(rocblas_handle handle, rocblas_fill uplo, rocblas_diagonal diag, rocblas_int n, const float *A, rocblas_int lda, float *invA, rocblas_int ldinvA)

rocblas_status rocblas_dtrtri(rocblas_handle handle, rocblas_fill uplo, rocblas_diagonal diag, rocblas_int n, const double *A, rocblas_int lda, double *invA, rocblas_int ldinvA)

BLAS Level 3 API

trtri compute the inverse of a matrix A, namely, invA and write the result into invA;

if rocblas_fill_upper, the lower part of A is not referenced if rocblas_fill_lower, the upper part of A is not referenced

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• uplo – [in] [rocblas_fill] specifies whether the upper ‘rocblas_fill_upper’ or lower ‘rocblas_fill_lower’

• diag – [in] [rocblas_diagonal]

  • ’rocblas_diagonal_non_unit’, A is non-unit triangular;

  • ’rocblas_diagonal_unit’, A is unit triangular;

• n – [in] [rocblas_int] size of matrix A and invA.

• A – [in] device pointer storing matrix A.

• lda – [in] [rocblas_int] specifies the leading dimension of A.

• invA – [out] device pointer storing matrix invA. Partial inplace operation is supported. See below: -If UPLO = ‘U’, the leading N-by-N upper triangular part of the invA will store the inverse of the upper triangular matrix, and the strictly lower triangular part of invA may be cleared.

  • If UPLO = ‘L’, the leading N-by-N lower triangular part of the invA will store the inverse of the lower triangular matrix, and the strictly upper triangular part of invA may be cleared.

• ldinvA – [in] [rocblas_int] specifies the leading dimension of invA.

rocblas_status rocblas_strtri_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_diagonal diag, rocblas_int n, const float *const A[], rocblas_int lda, float *const invA[], rocblas_int ldinvA, rocblas_int batch_count)

rocblas_status rocblas_dtrtri_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_diagonal diag, rocblas_int n, const double *const A[], rocblas_int lda, double *const invA[], rocblas_int ldinvA, rocblas_int batch_count)

BLAS Level 3 API

trtri_batched compute the inverse of A_i and write into invA_i where A_i and invA_i are the i-th matrices in the batch, for i = 1, …, batch_count.

Parameters:

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• uplo – [in] [rocblas_fill] specifies whether the upper ‘rocblas_fill_upper’ or lower ‘rocblas_fill_lower’

• diag – [in] [rocblas_diagonal]

  • ’rocblas_diagonal_non_unit’, A is non-unit triangular;

  • ’rocblas_diagonal_unit’, A is unit triangular;

• n – [in] [rocblas_int]

• A – [in] device array of device pointers storing each matrix A_i.

• lda – [in] [rocblas_int] specifies the leading dimension of each A_i.

• invA – [out] device array of device pointers storing the inverse of each matrix A_i. Partial inplace operation is supported. See below: -If UPLO = ‘U’, the leading N-by-N upper triangular part of the invA will store the inverse of the upper triangular matrix, and the strictly lower triangular part of invA may be cleared.

  • If UPLO = ‘L’, the leading N-by-N lower triangular part of the invA will store the inverse of the lower triangular matrix, and the strictly upper triangular part of invA may be cleared.

• ldinvA – [in] [rocblas_int] specifies the leading dimension of each invA_i.

• batch_count – [in] [rocblas_int] numbers of matrices in the batch.

rocblas_status rocblas_strtri_strided_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_diagonal diag, rocblas_int n, const float *A, rocblas_int lda, rocblas_stride stride_a, float *invA, rocblas_int ldinvA, rocblas_stride stride_invA, rocblas_int batch_count)

rocblas_status rocblas_dtrtri_strided_batched(rocblas_handle handle, rocblas_fill uplo, rocblas_diagonal diag, rocblas_int n, const double *A, rocblas_int lda, rocblas_stride stride_a, double *invA, rocblas_int ldinvA, rocblas_stride stride_invA, rocblas_int batch_count)

BLAS Level 3 API

trtri_strided_batched compute the inverse of A_i and write into invA_i where A_i and invA_i are the i-th matrices in the batch, for i = 1, …, batch_count.

• If UPLO = ‘U’, the leading N-by-N upper triangular part of the invA will store the inverse of the upper triangular matrix, and the strictly lower triangular part of invA may be cleared.

• If UPLO = ‘L’, the leading N-by-N lower triangular part of the invA will store the inverse of the lower triangular matrix, and the strictly upper triangular part of invA may be cleared.

Parameters:

• ldinvA – [in] [rocblas_int] specifies the leading dimension of each invA_i.

• stride_invA – [in] [rocblas_stride] “batch stride invA”: stride from the start of one invA_i matrix to the next invA_(i + 1).

• batch_count – [in] [rocblas_int] numbers of matrices in the batch.

• handle – [in] [rocblas_handle] handle to the rocblas library context queue.

• uplo – [in] [rocblas_fill] specifies whether the upper ‘rocblas_fill_upper’ or lower ‘rocblas_fill_lower’

• diag – [in] [rocblas_diagonal]

  • ’rocblas_diagonal_non_unit’, A is non-unit triangular;

  • ’rocblas_diagonal_unit’, A is unit triangular;

• n – [in] [rocblas_int]

• A – [in] device pointer pointing to address of first matrix A_1.

• lda – [in] [rocblas_int] specifies the leading dimension of each A.

• stride_a – [in] [rocblas_stride] “batch stride a”: stride from the start of one A_i matrix to the next A_(i + 1).

• invA – [out] device pointer storing the inverses of each matrix A_i. Partial inplace operation is supported. See below: