      SUBROUTINE CTFSM( TRANSR, SIDE, UPLO, TRANS, DIAG, M, N, ALPHA, A,
     +                  B, LDB )
*
*  -- LAPACK routine (version 3.3.0)                                    --
*
*  -- Contributed by Fred Gustavson of the IBM Watson Research Center --
*     November 2010
*
*  -- LAPACK is a software package provided by Univ. of Tennessee,    --
*  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
*
*     ..
*     .. Scalar Arguments ..
      CHARACTER          TRANSR, DIAG, SIDE, TRANS, UPLO
      INTEGER            LDB, M, N
      COMPLEX            ALPHA
*     ..
*     .. Array Arguments ..
      COMPLEX            A( 0: * ), B( 0: LDB-1, 0: * )
*     ..
*
*  Purpose
*  =======
*
*  Level 3 BLAS like routine for A in RFP Format.
*
*  CTFSM solves the matrix equation
*
*     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 a unit, or
*  non-unit,  upper or lower triangular matrix  and  op( A )  is one  of
*
*     op( A ) = A   or   op( A ) = conjg( A' ).
*
*  A is in Rectangular Full Packed (RFP) Format.
*
*  The matrix X is overwritten on B.
*
*  Arguments
*  ==========
*
*  TRANSR  (input) CHARACTER*1
*          = 'N':  The Normal Form of RFP A is stored;
*          = 'C':  The Conjugate-transpose Form of RFP A is stored.
*
*  SIDE    (input) CHARACTER*1
*           On entry, SIDE specifies whether op( A ) appears on the left
*           or right of X as follows:
*
*              SIDE = 'L' or 'l'   op( A )*X = alpha*B.
*
*              SIDE = 'R' or 'r'   X*op( A ) = alpha*B.
*
*           Unchanged on exit.
*
*  UPLO    (input) CHARACTER*1
*           On entry, UPLO specifies whether the RFP matrix A came from
*           an upper or lower triangular matrix as follows:
*           UPLO = 'U' or 'u' RFP A came from an upper triangular matrix
*           UPLO = 'L' or 'l' RFP A came from a  lower triangular matrix
*
*           Unchanged on exit.
*
*  TRANS   (input) CHARACTER*1
*           On entry, TRANS  specifies the form of op( A ) to be used
*           in the matrix multiplication as follows:
*
*              TRANS  = 'N' or 'n'   op( A ) = A.
*
*              TRANS  = 'C' or 'c'   op( A ) = conjg( A' ).
*
*           Unchanged on exit.
*
*  DIAG    (input) CHARACTER*1
*           On entry, DIAG specifies whether or not RFP A is unit
*           triangular as follows:
*
*              DIAG = 'U' or 'u'   A is assumed to be unit triangular.
*
*              DIAG = 'N' or 'n'   A is not assumed to be unit
*                                  triangular.
*
*           Unchanged on exit.
*
*  M       (input) INTEGER
*           On entry, M specifies the number of rows of B. M must be at
*           least zero.
*           Unchanged on exit.
*
*  N       (input) INTEGER
*           On entry, N specifies the number of columns of B.  N must be
*           at least zero.
*           Unchanged on exit.
*
*  ALPHA   (input) COMPLEX
*           On entry,  ALPHA specifies the scalar  alpha. When  alpha is
*           zero then  A is not referenced and  B need not be set before
*           entry.
*           Unchanged on exit.
*
*  A       (input) COMPLEX array, dimension (N*(N+1)/2)
*           NT = N*(N+1)/2. On entry, the matrix A in RFP Format.
*           RFP Format is described by TRANSR, UPLO and N as follows:
*           If TRANSR='N' then RFP A is (0:N,0:K-1) when N is even;
*           K=N/2. RFP A is (0:N-1,0:K) when N is odd; K=N/2. If
*           TRANSR = 'C' then RFP is the Conjugate-transpose of RFP A as
*           defined when TRANSR = 'N'. The contents of RFP A are defined
*           by UPLO as follows: If UPLO = 'U' the RFP A contains the NT
*           elements of upper packed A either in normal or
*           conjugate-transpose Format. If UPLO = 'L' the RFP A contains
*           the NT elements of lower packed A either in normal or
*           conjugate-transpose Format. The LDA of RFP A is (N+1)/2 when
*           TRANSR = 'C'. When TRANSR is 'N' the LDA is N+1 when N is
*           even and is N when is odd.
*           See the Note below for more details. Unchanged on exit.
*
*  B       (input/output) COMPLEX array,  dimension (LDB,N)
*           Before entry,  the leading  m by n part of the array  B must
*           contain  the  right-hand  side  matrix  B,  and  on exit  is
*           overwritten by the solution matrix  X.
*
*  LDB     (input) INTEGER
*           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.
*
*  Further Details
*  ===============
*
*  We first consider Standard Packed Format when N is even.
*  We give an example where N = 6.
*
*      AP is Upper             AP is Lower
*
*   00 01 02 03 04 05       00
*      11 12 13 14 15       10 11
*         22 23 24 25       20 21 22
*            33 34 35       30 31 32 33
*               44 45       40 41 42 43 44
*                  55       50 51 52 53 54 55
*
*
*  Let TRANSR = 'N'. RFP holds AP as follows:
*  For UPLO = 'U' the upper trapezoid A(0:5,0:2) consists of the last
*  three columns of AP upper. The lower triangle A(4:6,0:2) consists of
*  conjugate-transpose of the first three columns of AP upper.
*  For UPLO = 'L' the lower trapezoid A(1:6,0:2) consists of the first
*  three columns of AP lower. The upper triangle A(0:2,0:2) consists of
*  conjugate-transpose of the last three columns of AP lower.
*  To denote conjugate we place -- above the element. This covers the
*  case N even and TRANSR = 'N'.
*
*         RFP A                   RFP A
*
*                                -- -- --
*        03 04 05                33 43 53
*                                   -- --
*        13 14 15                00 44 54
*                                      --
*        23 24 25                10 11 55
*
*        33 34 35                20 21 22
*        --
*        00 44 45                30 31 32
*        -- --
*        01 11 55                40 41 42
*        -- -- --
*        02 12 22                50 51 52
*
*  Now let TRANSR = 'C'. RFP A in both UPLO cases is just the conjugate-
*  transpose of RFP A above. One therefore gets:
*
*
*           RFP A                   RFP A
*
*     -- -- -- --                -- -- -- -- -- --
*     03 13 23 33 00 01 02    33 00 10 20 30 40 50
*     -- -- -- -- --                -- -- -- -- --
*     04 14 24 34 44 11 12    43 44 11 21 31 41 51
*     -- -- -- -- -- --                -- -- -- --
*     05 15 25 35 45 55 22    53 54 55 22 32 42 52
*
*
*  We next  consider Standard Packed Format when N is odd.
*  We give an example where N = 5.
*
*     AP is Upper                 AP is Lower
*
*   00 01 02 03 04              00
*      11 12 13 14              10 11
*         22 23 24              20 21 22
*            33 34              30 31 32 33
*               44              40 41 42 43 44
*
*
*  Let TRANSR = 'N'. RFP holds AP as follows:
*  For UPLO = 'U' the upper trapezoid A(0:4,0:2) consists of the last
*  three columns of AP upper. The lower triangle A(3:4,0:1) consists of
*  conjugate-transpose of the first two   columns of AP upper.
*  For UPLO = 'L' the lower trapezoid A(0:4,0:2) consists of the first
*  three columns of AP lower. The upper triangle A(0:1,1:2) consists of
*  conjugate-transpose of the last two   columns of AP lower.
*  To denote conjugate we place -- above the element. This covers the
*  case N odd  and TRANSR = 'N'.
*
*         RFP A                   RFP A
*
*                                   -- --
*        02 03 04                00 33 43
*                                      --
*        12 13 14                10 11 44
*
*        22 23 24                20 21 22
*        --
*        00 33 34                30 31 32
*        -- --
*        01 11 44                40 41 42
*
*  Now let TRANSR = 'C'. RFP A in both UPLO cases is just the conjugate-
*  transpose of RFP A above. One therefore gets:
*
*
*           RFP A                   RFP A
*
*     -- -- --                   -- -- -- -- -- --
*     02 12 22 00 01             00 10 20 30 40 50
*     -- -- -- --                   -- -- -- -- --
*     03 13 23 33 11             33 11 21 31 41 51
*     -- -- -- -- --                   -- -- -- --
*     04 14 24 34 44             43 44 22 32 42 52
*
*     ..
*     .. Parameters ..
      COMPLEX            CONE, CZERO
      PARAMETER          ( CONE = ( 1.0E+0, 0.0E+0 ),
     +                   CZERO = ( 0.0E+0, 0.0E+0 ) )
*     ..
*     .. Local Scalars ..
      LOGICAL            LOWER, LSIDE, MISODD, NISODD, NORMALTRANSR,
     +                   NOTRANS
      INTEGER            M1, M2, N1, N2, K, INFO, I, J
*     ..
*     .. External Functions ..
      LOGICAL            LSAME
      EXTERNAL           LSAME
*     ..
*     .. External Subroutines ..
      EXTERNAL           XERBLA, CGEMM, CTRSM
*     ..
*     .. Intrinsic Functions ..
      INTRINSIC          MAX, MOD
*     ..
*     .. Executable Statements ..
*
*     Test the input parameters.
*
      INFO = 0
      NORMALTRANSR = LSAME( TRANSR, 'N' )
      LSIDE = LSAME( SIDE, 'L' )
      LOWER = LSAME( UPLO, 'L' )
      NOTRANS = LSAME( TRANS, 'N' )
      IF( .NOT.NORMALTRANSR .AND. .NOT.LSAME( TRANSR, 'C' ) ) THEN
         INFO = -1
      ELSE IF( .NOT.LSIDE .AND. .NOT.LSAME( SIDE, 'R' ) ) THEN
         INFO = -2
      ELSE IF( .NOT.LOWER .AND. .NOT.LSAME( UPLO, 'U' ) ) THEN
         INFO = -3
      ELSE IF( .NOT.NOTRANS .AND. .NOT.LSAME( TRANS, 'C' ) ) THEN
         INFO = -4
      ELSE IF( .NOT.LSAME( DIAG, 'N' ) .AND. .NOT.LSAME( DIAG, 'U' ) )
     +         THEN
         INFO = -5
      ELSE IF( M.LT.0 ) THEN
         INFO = -6
      ELSE IF( N.LT.0 ) THEN
         INFO = -7
      ELSE IF( LDB.LT.MAX( 1, M ) ) THEN
         INFO = -11
      END IF
      IF( INFO.NE.0 ) THEN
         CALL XERBLA( 'CTFSM ', -INFO )
         RETURN
      END IF
*
*     Quick return when ( (N.EQ.0).OR.(M.EQ.0) )
*
      IF( ( M.EQ.0 ) .OR. ( N.EQ.0 ) )
     +   RETURN
*
*     Quick return when ALPHA.EQ.(0E+0,0E+0)
*
      IF( ALPHA.EQ.CZERO ) THEN
         DO 20 J = 0, N - 1
            DO 10 I = 0, M - 1
               B( I, J ) = CZERO
   10       CONTINUE
   20    CONTINUE
         RETURN
      END IF
*
      IF( LSIDE ) THEN
*
*        SIDE = 'L'
*
*        A is M-by-M.
*        If M is odd, set NISODD = .TRUE., and M1 and M2.
*        If M is even, NISODD = .FALSE., and M.
*
         IF( MOD( M, 2 ).EQ.0 ) THEN
            MISODD = .FALSE.
            K = M / 2
         ELSE
            MISODD = .TRUE.
            IF( LOWER ) THEN
               M2 = M / 2
               M1 = M - M2
            ELSE
               M1 = M / 2
               M2 = M - M1
            END IF
         END IF
*
         IF( MISODD ) THEN
*
*           SIDE = 'L' and N is odd
*
            IF( NORMALTRANSR ) THEN
*
*              SIDE = 'L', N is odd, and TRANSR = 'N'
*
               IF( LOWER ) THEN
*
*                 SIDE  ='L', N is odd, TRANSR = 'N', and UPLO = 'L'
*
                  IF( NOTRANS ) THEN
*
*                    SIDE  ='L', N is odd, TRANSR = 'N', UPLO = 'L', and
*                    TRANS = 'N'
*
                     IF( M.EQ.1 ) THEN
                        CALL CTRSM( 'L', 'L', 'N', DIAG, M1, N, ALPHA,
     +                              A, M, B, LDB )
                     ELSE
                        CALL CTRSM( 'L', 'L', 'N', DIAG, M1, N, ALPHA,
     +                              A( 0 ), M, B, LDB )
                        CALL CGEMM( 'N', 'N', M2, N, M1, -CONE, A( M1 ),
     +                              M, B, LDB, ALPHA, B( M1, 0 ), LDB )
                        CALL CTRSM( 'L', 'U', 'C', DIAG, M2, N, CONE,
     +                              A( M ), M, B( M1, 0 ), LDB )
                     END IF
*
                  ELSE
*
*                    SIDE  ='L', N is odd, TRANSR = 'N', UPLO = 'L', and
*                    TRANS = 'C'
*
                     IF( M.EQ.1 ) THEN
                        CALL CTRSM( 'L', 'L', 'C', DIAG, M1, N, ALPHA,
     +                              A( 0 ), M, B, LDB )
                     ELSE
                        CALL CTRSM( 'L', 'U', 'N', DIAG, M2, N, ALPHA,
     +                              A( M ), M, B( M1, 0 ), LDB )
                        CALL CGEMM( 'C', 'N', M1, N, M2, -CONE, A( M1 ),
     +                              M, B( M1, 0 ), LDB, ALPHA, B, LDB )
                        CALL CTRSM( 'L', 'L', 'C', DIAG, M1, N, CONE,
     +                              A( 0 ), M, B, LDB )
                     END IF
*
                  END IF
*
               ELSE
*
*                 SIDE  ='L', N is odd, TRANSR = 'N', and UPLO = 'U'
*
                  IF( .NOT.NOTRANS ) THEN
*
*                    SIDE  ='L', N is odd, TRANSR = 'N', UPLO = 'U', and
*                    TRANS = 'N'
*
                     CALL CTRSM( 'L', 'L', 'N', DIAG, M1, N, ALPHA,
     +                           A( M2 ), M, B, LDB )
                     CALL CGEMM( 'C', 'N', M2, N, M1, -CONE, A( 0 ), M,
     +                           B, LDB, ALPHA, B( M1, 0 ), LDB )
                     CALL CTRSM( 'L', 'U', 'C', DIAG, M2, N, CONE,
     +                           A( M1 ), M, B( M1, 0 ), LDB )
*
                  ELSE
*
*                    SIDE  ='L', N is odd, TRANSR = 'N', UPLO = 'U', and
*                    TRANS = 'C'
*
                     CALL CTRSM( 'L', 'U', 'N', DIAG, M2, N, ALPHA,
     +                           A( M1 ), M, B( M1, 0 ), LDB )
                     CALL CGEMM( 'N', 'N', M1, N, M2, -CONE, A( 0 ), M,
     +                           B( M1, 0 ), LDB, ALPHA, B, LDB )
                     CALL CTRSM( 'L', 'L', 'C', DIAG, M1, N, CONE,
     +                           A( M2 ), M, B, LDB )
*
                  END IF
*
               END IF
*
            ELSE
*
*              SIDE = 'L', N is odd, and TRANSR = 'C'
*
               IF( LOWER ) THEN
*
*                 SIDE  ='L', N is odd, TRANSR = 'C', and UPLO = 'L'
*
                  IF( NOTRANS ) THEN
*
*                    SIDE  ='L', N is odd, TRANSR = 'C', UPLO = 'L', and
*                    TRANS = 'N'
*
                     IF( M.EQ.1 ) THEN
                        CALL CTRSM( 'L', 'U', 'C', DIAG, M1, N, ALPHA,
     +                              A( 0 ), M1, B, LDB )
                     ELSE
                        CALL CTRSM( 'L', 'U', 'C', DIAG, M1, N, ALPHA,
     +                              A( 0 ), M1, B, LDB )
                        CALL CGEMM( 'C', 'N', M2, N, M1, -CONE,
     +                              A( M1*M1 ), M1, B, LDB, ALPHA,
     +                              B( M1, 0 ), LDB )
                        CALL CTRSM( 'L', 'L', 'N', DIAG, M2, N, CONE,
     +                              A( 1 ), M1, B( M1, 0 ), LDB )
                     END IF
*
                  ELSE
*
*                    SIDE  ='L', N is odd, TRANSR = 'C', UPLO = 'L', and
*                    TRANS = 'C'
*
                     IF( M.EQ.1 ) THEN
                        CALL CTRSM( 'L', 'U', 'N', DIAG, M1, N, ALPHA,
     +                              A( 0 ), M1, B, LDB )
                     ELSE
                        CALL CTRSM( 'L', 'L', 'C', DIAG, M2, N, ALPHA,
     +                              A( 1 ), M1, B( M1, 0 ), LDB )
                        CALL CGEMM( 'N', 'N', M1, N, M2, -CONE,
     +                              A( M1*M1 ), M1, B( M1, 0 ), LDB,
     +                              ALPHA, B, LDB )
                        CALL CTRSM( 'L', 'U', 'N', DIAG, M1, N, CONE,
     +                              A( 0 ), M1, B, LDB )
                     END IF
*
                  END IF
*
               ELSE
*
*                 SIDE  ='L', N is odd, TRANSR = 'C', and UPLO = 'U'
*
                  IF( .NOT.NOTRANS ) THEN
*
*                    SIDE  ='L', N is odd, TRANSR = 'C', UPLO = 'U', and
*                    TRANS = 'N'
*
                     CALL CTRSM( 'L', 'U', 'C', DIAG, M1, N, ALPHA,
     +                           A( M2*M2 ), M2, B, LDB )
                     CALL CGEMM( 'N', 'N', M2, N, M1, -CONE, A( 0 ), M2,
     +                           B, LDB, ALPHA, B( M1, 0 ), LDB )
                     CALL CTRSM( 'L', 'L', 'N', DIAG, M2, N, CONE,
     +                           A( M1*M2 ), M2, B( M1, 0 ), LDB )
*
                  ELSE
*
*                    SIDE  ='L', N is odd, TRANSR = 'C', UPLO = 'U', and
*                    TRANS = 'C'
*
                     CALL CTRSM( 'L', 'L', 'C', DIAG, M2, N, ALPHA,
     +                           A( M1*M2 ), M2, B( M1, 0 ), LDB )
                     CALL CGEMM( 'C', 'N', M1, N, M2, -CONE, A( 0 ), M2,
     +                           B( M1, 0 ), LDB, ALPHA, B, LDB )
                     CALL CTRSM( 'L', 'U', 'N', DIAG, M1, N, CONE,
     +                           A( M2*M2 ), M2, B, LDB )
*
                  END IF
*
               END IF
*
            END IF
*
         ELSE
*
*           SIDE = 'L' and N is even
*
            IF( NORMALTRANSR ) THEN
*
*              SIDE = 'L', N is even, and TRANSR = 'N'
*
               IF( LOWER ) THEN
*
*                 SIDE  ='L', N is even, TRANSR = 'N', and UPLO = 'L'
*
                  IF( NOTRANS ) THEN
*
*                    SIDE  ='L', N is even, TRANSR = 'N', UPLO = 'L',
*                    and TRANS = 'N'
*
                     CALL CTRSM( 'L', 'L', 'N', DIAG, K, N, ALPHA,
     +                           A( 1 ), M+1, B, LDB )
                     CALL CGEMM( 'N', 'N', K, N, K, -CONE, A( K+1 ),
     +                           M+1, B, LDB, ALPHA, B( K, 0 ), LDB )
                     CALL CTRSM( 'L', 'U', 'C', DIAG, K, N, CONE,
     +                           A( 0 ), M+1, B( K, 0 ), LDB )
*
                  ELSE
*
*                    SIDE  ='L', N is even, TRANSR = 'N', UPLO = 'L',
*                    and TRANS = 'C'
*
                     CALL CTRSM( 'L', 'U', 'N', DIAG, K, N, ALPHA,
     +                           A( 0 ), M+1, B( K, 0 ), LDB )
                     CALL CGEMM( 'C', 'N', K, N, K, -CONE, A( K+1 ),
     +                           M+1, B( K, 0 ), LDB, ALPHA, B, LDB )
                     CALL CTRSM( 'L', 'L', 'C', DIAG, K, N, CONE,
     +                           A( 1 ), M+1, B, LDB )
*
                  END IF
*
               ELSE
*
*                 SIDE  ='L', N is even, TRANSR = 'N', and UPLO = 'U'
*
                  IF( .NOT.NOTRANS ) THEN
*
*                    SIDE  ='L', N is even, TRANSR = 'N', UPLO = 'U',
*                    and TRANS = 'N'
*
                     CALL CTRSM( 'L', 'L', 'N', DIAG, K, N, ALPHA,
     +                           A( K+1 ), M+1, B, LDB )
                     CALL CGEMM( 'C', 'N', K, N, K, -CONE, A( 0 ), M+1,
     +                           B, LDB, ALPHA, B( K, 0 ), LDB )
                     CALL CTRSM( 'L', 'U', 'C', DIAG, K, N, CONE,
     +                           A( K ), M+1, B( K, 0 ), LDB )
*
                  ELSE
*
*                    SIDE  ='L', N is even, TRANSR = 'N', UPLO = 'U',
*                    and TRANS = 'C'
                     CALL CTRSM( 'L', 'U', 'N', DIAG, K, N, ALPHA,
     +                           A( K ), M+1, B( K, 0 ), LDB )
                     CALL CGEMM( 'N', 'N', K, N, K, -CONE, A( 0 ), M+1,
     +                           B( K, 0 ), LDB, ALPHA, B, LDB )
                     CALL CTRSM( 'L', 'L', 'C', DIAG, K, N, CONE,
     +                           A( K+1 ), M+1, B, LDB )
*
                  END IF
*
               END IF
*
            ELSE
*
*              SIDE = 'L', N is even, and TRANSR = 'C'
*
               IF( LOWER ) THEN
*
*                 SIDE  ='L', N is even, TRANSR = 'C', and UPLO = 'L'
*
                  IF( NOTRANS ) THEN
*
*                    SIDE  ='L', N is even, TRANSR = 'C', UPLO = 'L',
*                    and TRANS = 'N'
*
                     CALL CTRSM( 'L', 'U', 'C', DIAG, K, N, ALPHA,
     +                           A( K ), K, B, LDB )
                     CALL CGEMM( 'C', 'N', K, N, K, -CONE,
     +                           A( K*( K+1 ) ), K, B, LDB, ALPHA,
     +                           B( K, 0 ), LDB )
                     CALL CTRSM( 'L', 'L', 'N', DIAG, K, N, CONE,
     +                           A( 0 ), K, B( K, 0 ), LDB )
*
                  ELSE
*
*                    SIDE  ='L', N is even, TRANSR = 'C', UPLO = 'L',
*                    and TRANS = 'C'
*
                     CALL CTRSM( 'L', 'L', 'C', DIAG, K, N, ALPHA,
     +                           A( 0 ), K, B( K, 0 ), LDB )
                     CALL CGEMM( 'N', 'N', K, N, K, -CONE,
     +                           A( K*( K+1 ) ), K, B( K, 0 ), LDB,
     +                           ALPHA, B, LDB )
                     CALL CTRSM( 'L', 'U', 'N', DIAG, K, N, CONE,
     +                           A( K ), K, B, LDB )
*
                  END IF
*
               ELSE
*
*                 SIDE  ='L', N is even, TRANSR = 'C', and UPLO = 'U'
*
                  IF( .NOT.NOTRANS ) THEN
*
*                    SIDE  ='L', N is even, TRANSR = 'C', UPLO = 'U',
*                    and TRANS = 'N'
*
                     CALL CTRSM( 'L', 'U', 'C', DIAG, K, N, ALPHA,
     +                           A( K*( K+1 ) ), K, B, LDB )
                     CALL CGEMM( 'N', 'N', K, N, K, -CONE, A( 0 ), K, B,
     +                           LDB, ALPHA, B( K, 0 ), LDB )
                     CALL CTRSM( 'L', 'L', 'N', DIAG, K, N, CONE,
     +                           A( K*K ), K, B( K, 0 ), LDB )
*
                  ELSE
*
*                    SIDE  ='L', N is even, TRANSR = 'C', UPLO = 'U',
*                    and TRANS = 'C'
*
                     CALL CTRSM( 'L', 'L', 'C', DIAG, K, N, ALPHA,
     +                           A( K*K ), K, B( K, 0 ), LDB )
                     CALL CGEMM( 'C', 'N', K, N, K, -CONE, A( 0 ), K,
     +                           B( K, 0 ), LDB, ALPHA, B, LDB )
                     CALL CTRSM( 'L', 'U', 'N', DIAG, K, N, CONE,
     +                           A( K*( K+1 ) ), K, B, LDB )
*
                  END IF
*
               END IF
*
            END IF
*
         END IF
*
      ELSE
*
*        SIDE = 'R'
*
*        A is N-by-N.
*        If N is odd, set NISODD = .TRUE., and N1 and N2.
*        If N is even, NISODD = .FALSE., and K.
*
         IF( MOD( N, 2 ).EQ.0 ) THEN
            NISODD = .FALSE.
            K = N / 2
         ELSE
            NISODD = .TRUE.
            IF( LOWER ) THEN
               N2 = N / 2
               N1 = N - N2
            ELSE
               N1 = N / 2
               N2 = N - N1
            END IF
         END IF
*
         IF( NISODD ) THEN
*
*           SIDE = 'R' and N is odd
*
            IF( NORMALTRANSR ) THEN
*
*              SIDE = 'R', N is odd, and TRANSR = 'N'
*
               IF( LOWER ) THEN
*
*                 SIDE  ='R', N is odd, TRANSR = 'N', and UPLO = 'L'
*
                  IF( NOTRANS ) THEN
*
*                    SIDE  ='R', N is odd, TRANSR = 'N', UPLO = 'L', and
*                    TRANS = 'N'
*
                     CALL CTRSM( 'R', 'U', 'C', DIAG, M, N2, ALPHA,
     +                           A( N ), N, B( 0, N1 ), LDB )
                     CALL CGEMM( 'N', 'N', M, N1, N2, -CONE, B( 0, N1 ),
     +                           LDB, A( N1 ), N, ALPHA, B( 0, 0 ),
     +                           LDB )
                     CALL CTRSM( 'R', 'L', 'N', DIAG, M, N1, CONE,
     +                           A( 0 ), N, B( 0, 0 ), LDB )
*
                  ELSE
*
*                    SIDE  ='R', N is odd, TRANSR = 'N', UPLO = 'L', and
*                    TRANS = 'C'
*
                     CALL CTRSM( 'R', 'L', 'C', DIAG, M, N1, ALPHA,
     +                           A( 0 ), N, B( 0, 0 ), LDB )
                     CALL CGEMM( 'N', 'C', M, N2, N1, -CONE, B( 0, 0 ),
     +                           LDB, A( N1 ), N, ALPHA, B( 0, N1 ),
     +                           LDB )
                     CALL CTRSM( 'R', 'U', 'N', DIAG, M, N2, CONE,
     +                           A( N ), N, B( 0, N1 ), LDB )
*
                  END IF
*
               ELSE
*
*                 SIDE  ='R', N is odd, TRANSR = 'N', and UPLO = 'U'
*
                  IF( NOTRANS ) THEN
*
*                    SIDE  ='R', N is odd, TRANSR = 'N', UPLO = 'U', and
*                    TRANS = 'N'
*
                     CALL CTRSM( 'R', 'L', 'C', DIAG, M, N1, ALPHA,
     +                           A( N2 ), N, B( 0, 0 ), LDB )
                     CALL CGEMM( 'N', 'N', M, N2, N1, -CONE, B( 0, 0 ),
     +                           LDB, A( 0 ), N, ALPHA, B( 0, N1 ),
     +                           LDB )
                     CALL CTRSM( 'R', 'U', 'N', DIAG, M, N2, CONE,
     +                           A( N1 ), N, B( 0, N1 ), LDB )
*
                  ELSE
*
*                    SIDE  ='R', N is odd, TRANSR = 'N', UPLO = 'U', and
*                    TRANS = 'C'
*
                     CALL CTRSM( 'R', 'U', 'C', DIAG, M, N2, ALPHA,
     +                           A( N1 ), N, B( 0, N1 ), LDB )
                     CALL CGEMM( 'N', 'C', M, N1, N2, -CONE, B( 0, N1 ),
     +                           LDB, A( 0 ), N, ALPHA, B( 0, 0 ), LDB )
                     CALL CTRSM( 'R', 'L', 'N', DIAG, M, N1, CONE,
     +                           A( N2 ), N, B( 0, 0 ), LDB )
*
                  END IF
*
               END IF
*
            ELSE
*
*              SIDE = 'R', N is odd, and TRANSR = 'C'
*
               IF( LOWER ) THEN
*
*                 SIDE  ='R', N is odd, TRANSR = 'C', and UPLO = 'L'
*
                  IF( NOTRANS ) THEN
*
*                    SIDE  ='R', N is odd, TRANSR = 'C', UPLO = 'L', and
*                    TRANS = 'N'
*
                     CALL CTRSM( 'R', 'L', 'N', DIAG, M, N2, ALPHA,
     +                           A( 1 ), N1, B( 0, N1 ), LDB )
                     CALL CGEMM( 'N', 'C', M, N1, N2, -CONE, B( 0, N1 ),
     +                           LDB, A( N1*N1 ), N1, ALPHA, B( 0, 0 ),
     +                           LDB )
                     CALL CTRSM( 'R', 'U', 'C', DIAG, M, N1, CONE,
     +                           A( 0 ), N1, B( 0, 0 ), LDB )
*
                  ELSE
*
*                    SIDE  ='R', N is odd, TRANSR = 'C', UPLO = 'L', and
*                    TRANS = 'C'
*
                     CALL CTRSM( 'R', 'U', 'N', DIAG, M, N1, ALPHA,
     +                           A( 0 ), N1, B( 0, 0 ), LDB )
                     CALL CGEMM( 'N', 'N', M, N2, N1, -CONE, B( 0, 0 ),
     +                           LDB, A( N1*N1 ), N1, ALPHA, B( 0, N1 ),
     +                           LDB )
                     CALL CTRSM( 'R', 'L', 'C', DIAG, M, N2, CONE,
     +                           A( 1 ), N1, B( 0, N1 ), LDB )
*
                  END IF
*
               ELSE
*
*                 SIDE  ='R', N is odd, TRANSR = 'C', and UPLO = 'U'
*
                  IF( NOTRANS ) THEN
*
*                    SIDE  ='R', N is odd, TRANSR = 'C', UPLO = 'U', and
*                    TRANS = 'N'
*
                     CALL CTRSM( 'R', 'U', 'N', DIAG, M, N1, ALPHA,
     +                           A( N2*N2 ), N2, B( 0, 0 ), LDB )
                     CALL CGEMM( 'N', 'C', M, N2, N1, -CONE, B( 0, 0 ),
     +                           LDB, A( 0 ), N2, ALPHA, B( 0, N1 ),
     +                           LDB )
                     CALL CTRSM( 'R', 'L', 'C', DIAG, M, N2, CONE,
     +                           A( N1*N2 ), N2, B( 0, N1 ), LDB )
*
                  ELSE
*
*                    SIDE  ='R', N is odd, TRANSR = 'C', UPLO = 'U', and
*                    TRANS = 'C'
*
                     CALL CTRSM( 'R', 'L', 'N', DIAG, M, N2, ALPHA,
     +                           A( N1*N2 ), N2, B( 0, N1 ), LDB )
                     CALL CGEMM( 'N', 'N', M, N1, N2, -CONE, B( 0, N1 ),
     +                           LDB, A( 0 ), N2, ALPHA, B( 0, 0 ),
     +                           LDB )
                     CALL CTRSM( 'R', 'U', 'C', DIAG, M, N1, CONE,
     +                           A( N2*N2 ), N2, B( 0, 0 ), LDB )
*
                  END IF
*
               END IF
*
            END IF
*
         ELSE
*
*           SIDE = 'R' and N is even
*
            IF( NORMALTRANSR ) THEN
*
*              SIDE = 'R', N is even, and TRANSR = 'N'
*
               IF( LOWER ) THEN
*
*                 SIDE  ='R', N is even, TRANSR = 'N', and UPLO = 'L'
*
                  IF( NOTRANS ) THEN
*
*                    SIDE  ='R', N is even, TRANSR = 'N', UPLO = 'L',
*                    and TRANS = 'N'
*
                     CALL CTRSM( 'R', 'U', 'C', DIAG, M, K, ALPHA,
     +                           A( 0 ), N+1, B( 0, K ), LDB )
                     CALL CGEMM( 'N', 'N', M, K, K, -CONE, B( 0, K ),
     +                           LDB, A( K+1 ), N+1, ALPHA, B( 0, 0 ),
     +                           LDB )
                     CALL CTRSM( 'R', 'L', 'N', DIAG, M, K, CONE,
     +                           A( 1 ), N+1, B( 0, 0 ), LDB )
*
                  ELSE
*
*                    SIDE  ='R', N is even, TRANSR = 'N', UPLO = 'L',
*                    and TRANS = 'C'
*
                     CALL CTRSM( 'R', 'L', 'C', DIAG, M, K, ALPHA,
     +                           A( 1 ), N+1, B( 0, 0 ), LDB )
                     CALL CGEMM( 'N', 'C', M, K, K, -CONE, B( 0, 0 ),
     +                           LDB, A( K+1 ), N+1, ALPHA, B( 0, K ),
     +                           LDB )
                     CALL CTRSM( 'R', 'U', 'N', DIAG, M, K, CONE,
     +                           A( 0 ), N+1, B( 0, K ), LDB )
*
                  END IF
*
               ELSE
*
*                 SIDE  ='R', N is even, TRANSR = 'N', and UPLO = 'U'
*
                  IF( NOTRANS ) THEN
*
*                    SIDE  ='R', N is even, TRANSR = 'N', UPLO = 'U',
*                    and TRANS = 'N'
*
                     CALL CTRSM( 'R', 'L', 'C', DIAG, M, K, ALPHA,
     +                           A( K+1 ), N+1, B( 0, 0 ), LDB )
                     CALL CGEMM( 'N', 'N', M, K, K, -CONE, B( 0, 0 ),
     +                           LDB, A( 0 ), N+1, ALPHA, B( 0, K ),
     +                           LDB )
                     CALL CTRSM( 'R', 'U', 'N', DIAG, M, K, CONE,
     +                           A( K ), N+1, B( 0, K ), LDB )
*
                  ELSE
*
*                    SIDE  ='R', N is even, TRANSR = 'N', UPLO = 'U',
*                    and TRANS = 'C'
*
                     CALL CTRSM( 'R', 'U', 'C', DIAG, M, K, ALPHA,
     +                           A( K ), N+1, B( 0, K ), LDB )
                     CALL CGEMM( 'N', 'C', M, K, K, -CONE, B( 0, K ),
     +                           LDB, A( 0 ), N+1, ALPHA, B( 0, 0 ),
     +                           LDB )
                     CALL CTRSM( 'R', 'L', 'N', DIAG, M, K, CONE,
     +                           A( K+1 ), N+1, B( 0, 0 ), LDB )
*
                  END IF
*
               END IF
*
            ELSE
*
*              SIDE = 'R', N is even, and TRANSR = 'C'
*
               IF( LOWER ) THEN
*
*                 SIDE  ='R', N is even, TRANSR = 'C', and UPLO = 'L'
*
                  IF( NOTRANS ) THEN
*
*                    SIDE  ='R', N is even, TRANSR = 'C', UPLO = 'L',
*                    and TRANS = 'N'
*
                     CALL CTRSM( 'R', 'L', 'N', DIAG, M, K, ALPHA,
     +                           A( 0 ), K, B( 0, K ), LDB )
                     CALL CGEMM( 'N', 'C', M, K, K, -CONE, B( 0, K ),
     +                           LDB, A( ( K+1 )*K ), K, ALPHA,
     +                           B( 0, 0 ), LDB )
                     CALL CTRSM( 'R', 'U', 'C', DIAG, M, K, CONE,
     +                           A( K ), K, B( 0, 0 ), LDB )
*
                  ELSE
*
*                    SIDE  ='R', N is even, TRANSR = 'C', UPLO = 'L',
*                    and TRANS = 'C'
*
                     CALL CTRSM( 'R', 'U', 'N', DIAG, M, K, ALPHA,
     +                           A( K ), K, B( 0, 0 ), LDB )
                     CALL CGEMM( 'N', 'N', M, K, K, -CONE, B( 0, 0 ),
     +                           LDB, A( ( K+1 )*K ), K, ALPHA,
     +                           B( 0, K ), LDB )
                     CALL CTRSM( 'R', 'L', 'C', DIAG, M, K, CONE,
     +                           A( 0 ), K, B( 0, K ), LDB )
*
                  END IF
*
               ELSE
*
*                 SIDE  ='R', N is even, TRANSR = 'C', and UPLO = 'U'
*
                  IF( NOTRANS ) THEN
*
*                    SIDE  ='R', N is even, TRANSR = 'C', UPLO = 'U',
*                    and TRANS = 'N'
*
                     CALL CTRSM( 'R', 'U', 'N', DIAG, M, K, ALPHA,
     +                           A( ( K+1 )*K ), K, B( 0, 0 ), LDB )
                     CALL CGEMM( 'N', 'C', M, K, K, -CONE, B( 0, 0 ),
     +                           LDB, A( 0 ), K, ALPHA, B( 0, K ), LDB )
                     CALL CTRSM( 'R', 'L', 'C', DIAG, M, K, CONE,
     +                           A( K*K ), K, B( 0, K ), LDB )
*
                  ELSE
*
*                    SIDE  ='R', N is even, TRANSR = 'C', UPLO = 'U',
*                    and TRANS = 'C'
*
                     CALL CTRSM( 'R', 'L', 'N', DIAG, M, K, ALPHA,
     +                           A( K*K ), K, B( 0, K ), LDB )
                     CALL CGEMM( 'N', 'N', M, K, K, -CONE, B( 0, K ),
     +                           LDB, A( 0 ), K, ALPHA, B( 0, 0 ), LDB )
                     CALL CTRSM( 'R', 'U', 'C', DIAG, M, K, CONE,
     +                           A( ( K+1 )*K ), K, B( 0, 0 ), LDB )
*
                  END IF
*
               END IF
*
            END IF
*
         END IF
      END IF
*
      RETURN
*
*     End of CTFSM
*
      END
