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      LOGICAL          FUNCTION LSAME( CA, CB )
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*
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*  -- LAPACK auxiliary routine (version 2.0) --
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*     Univ. of Tennessee, Univ. of California Berkeley, NAG Ltd.,
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*     Courant Institute, Argonne National Lab, and Rice University
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*     January 31, 1994
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*
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*     .. Scalar Arguments ..
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      CHARACTER          CA, CB
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*     ..
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*
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*  Purpose
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*  =======
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*
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*  LSAME returns .TRUE. if CA is the same letter as CB regardless of
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*  case.
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*
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*  Arguments
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*  =========
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*
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*  CA      (input) CHARACTER*1
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*  CB      (input) CHARACTER*1
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*          CA and CB specify the single characters to be compared.
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*
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* =====================================================================
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*
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*     .. Intrinsic Functions ..
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      INTRINSIC          ICHAR
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*     ..
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*     .. Local Scalars ..
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      INTEGER            INTA, INTB, ZCODE
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*     ..
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*     .. Executable Statements ..
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*
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*     Test if the characters are equal
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*
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      LSAME = CA.EQ.CB
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      IF( LSAME )
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     $   RETURN
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*
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*     Now test for equivalence if both characters are alphabetic.
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*
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      ZCODE = ICHAR( 'Z' )
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*
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*     Use 'Z' rather than 'A' so that ASCII can be detected on Prime
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*     machines, on which ICHAR returns a value with bit 8 set.
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*     ICHAR('A') on Prime machines returns 193 which is the same as
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*     ICHAR('A') on an EBCDIC machine.
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*
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      INTA = ICHAR( CA )
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      INTB = ICHAR( CB )
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*
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      IF( ZCODE.EQ.90 .OR. ZCODE.EQ.122 ) THEN
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*
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*        ASCII is assumed - ZCODE is the ASCII code of either lower or
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*        upper case 'Z'.
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*
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         IF( INTA.GE.97 .AND. INTA.LE.122 ) INTA = INTA - 32
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         IF( INTB.GE.97 .AND. INTB.LE.122 ) INTB = INTB - 32
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*
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      ELSE IF( ZCODE.EQ.233 .OR. ZCODE.EQ.169 ) THEN
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*
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*        EBCDIC is assumed - ZCODE is the EBCDIC code of either lower or
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*        upper case 'Z'.
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*
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         IF( INTA.GE.129 .AND. INTA.LE.137 .OR.
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     $       INTA.GE.145 .AND. INTA.LE.153 .OR.
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     $       INTA.GE.162 .AND. INTA.LE.169 ) INTA = INTA + 64
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         IF( INTB.GE.129 .AND. INTB.LE.137 .OR.
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     $       INTB.GE.145 .AND. INTB.LE.153 .OR.
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     $       INTB.GE.162 .AND. INTB.LE.169 ) INTB = INTB + 64
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*
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      ELSE IF( ZCODE.EQ.218 .OR. ZCODE.EQ.250 ) THEN
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*
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*        ASCII is assumed, on Prime machines - ZCODE is the ASCII code
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*        plus 128 of either lower or upper case 'Z'.
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*
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         IF( INTA.GE.225 .AND. INTA.LE.250 ) INTA = INTA - 32
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         IF( INTB.GE.225 .AND. INTB.LE.250 ) INTB = INTB - 32
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      END IF
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      LSAME = INTA.EQ.INTB
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*
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*     RETURN
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*
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*     End of LSAME
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*
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      END