Contents
chemm - perform one of the matrix-matrix operations C :=
alpha*A*B + beta*C or C := alpha*B*A + beta*C
SUBROUTINE CHEMM(SIDE, UPLO, M, N, ALPHA, A, LDA, B, LDB, BETA, C,
LDC)
CHARACTER * 1 SIDE, UPLO
COMPLEX ALPHA, BETA
COMPLEX A(LDA,*), B(LDB,*), C(LDC,*)
INTEGER M, N, LDA, LDB, LDC
SUBROUTINE CHEMM_64(SIDE, UPLO, M, N, ALPHA, A, LDA, B, LDB, BETA, C,
LDC)
CHARACTER * 1 SIDE, UPLO
COMPLEX ALPHA, BETA
COMPLEX A(LDA,*), B(LDB,*), C(LDC,*)
INTEGER*8 M, N, LDA, LDB, LDC
F95 INTERFACE
SUBROUTINE HEMM(SIDE, UPLO, [M], [N], ALPHA, A, [LDA], B, [LDB],
BETA, C, [LDC])
CHARACTER(LEN=1) :: SIDE, UPLO
COMPLEX :: ALPHA, BETA
COMPLEX, DIMENSION(:,:) :: A, B, C
INTEGER :: M, N, LDA, LDB, LDC
SUBROUTINE HEMM_64(SIDE, UPLO, [M], [N], ALPHA, A, [LDA], B, [LDB],
BETA, C, [LDC])
CHARACTER(LEN=1) :: SIDE, UPLO
COMPLEX :: ALPHA, BETA
COMPLEX, DIMENSION(:,:) :: A, B, C
INTEGER(8) :: M, N, LDA, LDB, LDC
C INTERFACE
#include <sunperf.h>
void chemm(char side, char uplo, int m, int n, complex
*alpha, complex *a, int lda, complex *b, int ldb,
complex *beta, complex *c, int ldc);
void chemm_64(char side, char uplo, long m, long n, complex
*alpha, complex *a, long lda, complex *b, long
ldb, complex *beta, complex *c, long ldc);
chemm performs one of the matrix-matrix operations C :=
alpha*A*B + beta*C or C := alpha*B*A + beta*C where alpha
and beta are scalars, A is an hermitian matrix and B and C
are m by n matrices.
SIDE (input)
On entry, SIDE specifies whether the hermitian
matrix A appears on the left or right in the
operation as follows:
SIDE = 'L' or 'l' C := alpha*A*B + beta*C,
SIDE = 'R' or 'r' C := alpha*B*A + beta*C,
Unchanged on exit.
UPLO (input)
On entry, UPLO specifies whether the upper
or lower triangular part of the hermitian
matrix A is to be referenced as follows:
UPLO = 'U' or 'u' Only the upper triangular part
of the hermitian matrix is to be referenced.
UPLO = 'L' or 'l' Only the lower triangular part
of the hermitian matrix is to be referenced.
Unchanged on exit.
M (input)
On entry, M specifies the number of rows of the
matrix C. M >= 0. Unchanged on exit.
N (input)
On entry, N specifies the number of columns of the
matrix C. N >= 0. Unchanged on exit.
ALPHA (input)
On entry, ALPHA specifies the scalar alpha.
Unchanged on exit.
A (input)
COMPLEX array of DIMENSION ( LDA, ka ), where ka
is m when SIDE = 'L' or 'l' and is n other-
wise.
Before entry with SIDE = 'L' or 'l', the m by
m part of the array A must contain the hermi-
tian matrix, such that when UPLO = 'U' or 'u',
the leading m by m upper triangular part of the
array A must contain the upper triangular part
of the hermitian matrix and the strictly lower
triangular part of A is not referenced, and
when UPLO = 'L' or 'l', the leading m by m
lower triangular part of the array A must con-
tain the lower triangular part of the hermi-
tian matrix and the strictly upper triangular
part of A is not referenced.
Before entry with SIDE = 'R' or 'r', the n by
n part of the array A must contain the hermi-
tian matrix, such that when UPLO = 'U' or 'u',
the leading n by n upper triangular part of the
array A must contain the upper triangular part
of the hermitian matrix and the strictly lower
triangular part of A is not referenced, and
when UPLO = 'L' or 'l', the leading n by n
lower triangular part of the array A must con-
tain the lower triangular part of the hermi-
tian matrix and the strictly upper triangular
part of A is not referenced.
Note that the imaginary parts of the diagonal
elements need not be set, they are assumed to be
zero. Unchanged on exit.
LDA (input)
On entry, LDA specifies the first dimension of A
as declared in the calling (sub) program. When
SIDE = 'L' or 'l' then LDA >= max( 1, m ), other-
wise LDA >= max( 1, n ). Unchanged on exit.
B (input)
COMPLEX array of DIMENSION ( LDB, n ). Before
entry, the leading m by n part of the array B
must contain the matrix B. Unchanged on exit.
LDB (input)
On entry, LDB specifies the first dimension of B
as declared in the calling (sub) program.
LDB must be at least max( 1, m ). Unchanged
on exit.
BETA (input)
On entry, BETA specifies the scalar beta. When
BETA is supplied as zero then C need not be set
on input. Unchanged on exit.
C (input/output)
COMPLEX array of DIMENSION ( LDC, n ).
Before entry, the leading m by n part of the
array C must contain the matrix C, except when
beta is zero, in which case C need not be set on
entry.
On exit, the array C is overwritten by the m by
n updated matrix.
LDC (input)
On entry, LDC specifies the first dimension of C
as declared in the calling (sub) program.
LDC must be at least max( 1, m ). Unchanged
on exit.