zgemm - perform one of the matrix-matrix operations C := alpha*op( A )*op( B ) + beta*C
SUBROUTINE ZGEMM( TRANSA, TRANSB, M, N, K, ALPHA, A, LDA, B, LDB,
* BETA, C, LDC)
CHARACTER * 1 TRANSA, TRANSB
DOUBLE COMPLEX ALPHA, BETA
DOUBLE COMPLEX A(LDA,*), B(LDB,*), C(LDC,*)
INTEGER M, N, K, LDA, LDB, LDC
SUBROUTINE ZGEMM_64( TRANSA, TRANSB, M, N, K, ALPHA, A, LDA, B, LDB,
* BETA, C, LDC)
CHARACTER * 1 TRANSA, TRANSB
DOUBLE COMPLEX ALPHA, BETA
DOUBLE COMPLEX A(LDA,*), B(LDB,*), C(LDC,*)
INTEGER*8 M, N, K, LDA, LDB, LDC
SUBROUTINE GEMM( [TRANSA], [TRANSB], [M], [N], [K], ALPHA, A, [LDA],
* B, [LDB], BETA, C, [LDC])
CHARACTER(LEN=1) :: TRANSA, TRANSB
COMPLEX(8) :: ALPHA, BETA
COMPLEX(8), DIMENSION(:,:) :: A, B, C
INTEGER :: M, N, K, LDA, LDB, LDC
SUBROUTINE GEMM_64( [TRANSA], [TRANSB], [M], [N], [K], ALPHA, A,
* [LDA], B, [LDB], BETA, C, [LDC])
CHARACTER(LEN=1) :: TRANSA, TRANSB
COMPLEX(8) :: ALPHA, BETA
COMPLEX(8), DIMENSION(:,:) :: A, B, C
INTEGER(8) :: M, N, K, LDA, LDB, LDC
#include <sunperf.h>
void zgemm(char transa, char transb, int m, int n, int k, doublecomplex alpha, doublecomplex *a, int lda, doublecomplex *b, int ldb, doublecomplex beta, doublecomplex *c, int ldc);
void zgemm_64(char transa, char transb, long m, long n, long k, doublecomplex alpha, doublecomplex *a, long lda, doublecomplex *b, long ldb, doublecomplex beta, doublecomplex *c, long ldc);
zgemm 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' or op(X)
= conjg(X'),
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.
- TRANSA (input)
On entry, TRANSA specifies the form of op( A ) to be used in
the matrix multiplication as follows:
TRANSA = 'N' or 'n', op( A ) = A.
TRANSA = 'T' or 't', op( A ) = A'.
TRANSA = 'C' or 'c', op( A ) = conjg( A' ).
Unchanged on exit.
- TRANSB (input)
On entry, TRANSB specifies the form of op( B ) to be used in
the matrix multiplication as follows:
TRANSB = 'N' or 'n', op( B ) = B.
TRANSB = 'T' or 't', op( B ) = B'.
TRANSB = 'C' or 'c', op( B ) = conjg( B' ).
Unchanged on exit.
- M (input)
On entry, M specifies the number of rows of the matrix
op( A ) and of the matrix C. M > = 0.
Unchanged on exit.
- N (input)
On entry, N specifies the number of columns of the matrix
op( B ) and the number of columns of the matrix C. N > = 0.
Unchanged on exit.
- K (input)
On entry, K specifies the number of columns of the matrix
op( A ) and the number of rows of the matrix op( B ). K > = 0.
Unchanged on exit.
- ALPHA (input)
On entry, ALPHA specifies the scalar alpha.
Unchanged on exit.
- A (input)
K when TRANSA = 'N' or 'n', and is M otherwise.
Before entry with TRANSA = 'N' or 'n', the leading M by K
part of the array A must contain the matrix A, otherwise
the leading K by M part of the array A must contain the
matrix A.
Unchanged on exit.
- LDA (input)
On entry, LDA specifies the first dimension of A as declared
in the calling (sub) program. When TRANSA = 'N' or 'n' then
LDA > = max(1, M), otherwise LDA > = max(1, K).
Unchanged on exit.
- B (input)
n when TRANSB = 'N' or 'n', and is k otherwise.
Before entry with TRANSB = 'N' or 'n', the leading k by n
part of the array B must contain the matrix B, otherwise
the leading n by k 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. When TRANSB = 'N' or 'n' then
LDB > = max( 1, k ), otherwise LDB > = max( 1, n ).
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)
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 matrix
( alpha*op( A )*op( B ) + beta*C ).
- LDC (input)
On entry, LDC specifies the first dimension of C as declared
in the calling (sub) program. LDC > = max( 1, m ).
Unchanged on exit.