spotf2 - tive definite matrix A
SUBROUTINE SPOTF2(UPLO, N, A, LDA, INFO) CHARACTER*1 UPLO INTEGER N, LDA, INFO REAL A(LDA,*) SUBROUTINE SPOTF2_64(UPLO, N, A, LDA, INFO) CHARACTER*1 UPLO INTEGER*8 N, LDA, INFO REAL A(LDA,*) F95 INTERFACE SUBROUTINE POTF2(UPLO, N, A, LDA, INFO) CHARACTER(LEN=1) :: UPLO INTEGER :: N, LDA, INFO REAL, DIMENSION(:,:) :: A SUBROUTINE POTF2_64(UPLO, N, A, LDA, INFO) CHARACTER(LEN=1) :: UPLO INTEGER(8) :: N, LDA, INFO REAL, DIMENSION(:,:) :: A C INTERFACE #include <sunperf.h> void spotf2(char uplo, int n, float *a, int lda, int *info); void spotf2_64(char uplo, long n, float *a, long lda, long *info);
Oracle Solaris Studio Performance Library spotf2(3P) NAME spotf2 - compute the Cholesky factorization of a real symmetric posi- tive definite matrix A SYNOPSIS SUBROUTINE SPOTF2(UPLO, N, A, LDA, INFO) CHARACTER*1 UPLO INTEGER N, LDA, INFO REAL A(LDA,*) SUBROUTINE SPOTF2_64(UPLO, N, A, LDA, INFO) CHARACTER*1 UPLO INTEGER*8 N, LDA, INFO REAL A(LDA,*) F95 INTERFACE SUBROUTINE POTF2(UPLO, N, A, LDA, INFO) CHARACTER(LEN=1) :: UPLO INTEGER :: N, LDA, INFO REAL, DIMENSION(:,:) :: A SUBROUTINE POTF2_64(UPLO, N, A, LDA, INFO) CHARACTER(LEN=1) :: UPLO INTEGER(8) :: N, LDA, INFO REAL, DIMENSION(:,:) :: A C INTERFACE #include <sunperf.h> void spotf2(char uplo, int n, float *a, int lda, int *info); void spotf2_64(char uplo, long n, float *a, long lda, long *info); PURPOSE spotf2 computes the Cholesky factorization of a real symmetric positive definite matrix A. The factorization has the form A = U' * U , if UPLO = 'U', or A = L * L', if UPLO = 'L', where U is an upper triangular matrix and L is lower triangular. This is the unblocked version of the algorithm, calling Level 2 BLAS. ARGUMENTS UPLO (input) Specifies whether the upper or lower triangular part of the symmetric matrix A is stored. = 'U': Upper triangular = 'L': Lower triangular N (input) The order of the matrix A. N >= 0. A (input/output) On entry, the symmetric matrix A. If UPLO = 'U', the leading n by n upper triangular part of A contains the upper triangu- lar part of the matrix A, and the strictly lower triangular part of A is not referenced. If UPLO = 'L', the leading n by n lower triangular part of A contains the lower triangular part of the matrix A, and the strictly upper triangular part of A is not referenced. On exit, if INFO = 0, the factor U or L from the Cholesky factorization A = U'*U or A = L*L'. LDA (input) The leading dimension of the array A. LDA >= max(1,N). INFO (output) = 0: successful exit < 0: if INFO = -k, the k-th argument had an illegal value > 0: if INFO = k, the leading minor of order k is not posi- tive definite, and the factorization could not be completed. 7 Nov 2015 spotf2(3P)