128 SUBROUTINE ssytri2( UPLO, N, A, LDA, IPIV, WORK, LWORK, INFO )
137 INTEGER INFO, LDA, LWORK, N
141 REAL A( lda, * ), WORK( * )
147 LOGICAL UPPER, LQUERY
148 INTEGER MINSIZE, NBMAX
153 EXTERNAL lsame, ilaenv
163 upper = lsame( uplo,
'U' )
164 lquery = ( lwork.EQ.-1 )
166 nbmax = ilaenv( 1,
'SSYTRF', uplo, n, -1, -1, -1 )
167 IF ( nbmax .GE. n )
THEN
170 minsize = (n+nbmax+1)*(nbmax+3)
173 IF( .NOT.upper .AND. .NOT.lsame( uplo,
'L' ) )
THEN
175 ELSE IF( n.LT.0 )
THEN
177 ELSE IF( lda.LT.max( 1, n ) )
THEN
179 ELSE IF (lwork .LT. minsize .AND. .NOT.lquery )
THEN
187 CALL
xerbla(
'SSYTRI2', -info )
189 ELSE IF( lquery )
THEN
196 IF( nbmax .GE. n )
THEN
197 CALL
ssytri( uplo, n, a, lda, ipiv, work, info )
199 CALL
ssytri2x( uplo, n, a, lda, ipiv, work, nbmax, info )
subroutine xerbla(SRNAME, INFO)
XERBLA
subroutine ssytri(UPLO, N, A, LDA, IPIV, WORK, INFO)
SSYTRI
subroutine ssytri2x(UPLO, N, A, LDA, IPIV, WORK, NB, INFO)
SSYTRI2X
subroutine ssytri2(UPLO, N, A, LDA, IPIV, WORK, LWORK, INFO)
SSYTRI2