LOGICAL FUNCTION LSAME(CA,CB)
!
!  -- LAPACK auxiliary routine (version 3.1) --
!     Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd..
!     November 2006
!
!     .. Scalar Arguments ..
      CHARACTER CA,CB
!     ..
!
!  Purpose
!  =======
!
!  LSAME returns .TRUE. if CA is the same letter as CB regardless of
!  case.
!
!  Arguments
!  =========
!
!  CA      (input) CHARACTER*1
!
!  CB      (input) CHARACTER*1
!          CA and CB specify the single characters to be compared.
!
! =====================================================================
!
!     .. Intrinsic Functions ..
      INTRINSIC ICHAR
!     ..
!     .. Local Scalars ..
      INTEGER INTA,INTB,ZCODE
!     ..
!
!     Test if the characters are equal
!
      LSAME = CA .EQ. CB
      IF (LSAME) RETURN
!
!     Now test for equivalence if both characters are alphabetic.
!
      ZCODE = ICHAR('Z')
!
!     Use 'Z' rather than 'A' so that ASCII can be detected on Prime
!     machines, on which ICHAR returns a value with bit 8 set.
!     ICHAR('A') on Prime machines returns 193 which is the same as
!     ICHAR('A') on an EBCDIC machine.
!
      INTA = ICHAR(CA)
      INTB = ICHAR(CB)
!
      IF (ZCODE.EQ.90 .OR. ZCODE.EQ.122) THEN
!
!        ASCII is assumed - ZCODE is the ASCII code of either lower or
!        upper case 'Z'.
!
          IF (INTA.GE.97 .AND. INTA.LE.122) INTA = INTA - 32
          IF (INTB.GE.97 .AND. INTB.LE.122) INTB = INTB - 32
!
      ELSE IF (ZCODE.EQ.233 .OR. ZCODE.EQ.169) THEN
!
!        EBCDIC is assumed - ZCODE is the EBCDIC code of either lower or
!        upper case 'Z'.
!
          IF (INTA.GE.129 .AND. INTA.LE.137 .OR. &
              INTA.GE.145 .AND. INTA.LE.153 .OR. &
              INTA.GE.162 .AND. INTA.LE.169) INTA = INTA + 64
          IF (INTB.GE.129 .AND. INTB.LE.137 .OR. &
              INTB.GE.145 .AND. INTB.LE.153 .OR. &
              INTB.GE.162 .AND. INTB.LE.169) INTB = INTB + 64
!
      ELSE IF (ZCODE.EQ.218 .OR. ZCODE.EQ.250) THEN
!
!        ASCII is assumed, on Prime machines - ZCODE is the ASCII code
!        plus 128 of either lower or upper case 'Z'.
!
          IF (INTA.GE.225 .AND. INTA.LE.250) INTA = INTA - 32
          IF (INTB.GE.225 .AND. INTB.LE.250) INTB = INTB - 32
      END IF
      LSAME = INTA .EQ. INTB
!
!     RETURN
!
!     End of LSAME
!
      END FUNCTION LSAME