SUBROUTINE ZTRMV(UPLO,TRANS,DIAG,N,A,LDA,X,INCX)
INTEGER INCX,LDA,N
CHARACTER DIAG,TRANS,UPLO
DOUBLE COMPLEX A(LDA,*),X(*)
DOUBLE COMPLEX ZERO
PARAMETER (ZERO= (0.0D+0,0.0D+0))
DOUBLE COMPLEX TEMP
INTEGER I,INFO,IX,J,JX,KX
LOGICAL NOCONJ,NOUNIT
LOGICAL LSAME
EXTERNAL LSAME
EXTERNAL XERBLA
INTRINSIC DCONJG,MAX
INFO = 0
IF (.NOT.LSAME(UPLO,'U') .AND. .NOT.LSAME(UPLO,'L')) THEN
INFO = 1
ELSE IF (.NOT.LSAME(TRANS,'N') .AND. .NOT.LSAME(TRANS,'T') .AND.
+ .NOT.LSAME(TRANS,'C')) THEN
INFO = 2
ELSE IF (.NOT.LSAME(DIAG,'U') .AND. .NOT.LSAME(DIAG,'N')) THEN
INFO = 3
ELSE IF (N.LT.0) THEN
INFO = 4
ELSE IF (LDA.LT.MAX(1,N)) THEN
INFO = 6
ELSE IF (INCX.EQ.0) THEN
INFO = 8
END IF
IF (INFO.NE.0) THEN
CALL XERBLA('ZTRMV ',INFO)
RETURN
END IF
IF (N.EQ.0) RETURN
NOCONJ = LSAME(TRANS,'T')
NOUNIT = LSAME(DIAG,'N')
IF (INCX.LE.0) THEN
KX = 1 - (N-1)*INCX
ELSE IF (INCX.NE.1) THEN
KX = 1
END IF
IF (LSAME(TRANS,'N')) THEN
IF (LSAME(UPLO,'U')) THEN
IF (INCX.EQ.1) THEN
DO 20 J = 1,N
IF (X(J).NE.ZERO) THEN
TEMP = X(J)
DO 10 I = 1,J - 1
X(I) = X(I) + TEMP*A(I,J)
10 CONTINUE
IF (NOUNIT) X(J) = X(J)*A(J,J)
END IF
20 CONTINUE
ELSE
JX = KX
DO 40 J = 1,N
IF (X(JX).NE.ZERO) THEN
TEMP = X(JX)
IX = KX
DO 30 I = 1,J - 1
X(IX) = X(IX) + TEMP*A(I,J)
IX = IX + INCX
30 CONTINUE
IF (NOUNIT) X(JX) = X(JX)*A(J,J)
END IF
JX = JX + INCX
40 CONTINUE
END IF
ELSE
IF (INCX.EQ.1) THEN
DO 60 J = N,1,-1
IF (X(J).NE.ZERO) THEN
TEMP = X(J)
DO 50 I = N,J + 1,-1
X(I) = X(I) + TEMP*A(I,J)
50 CONTINUE
IF (NOUNIT) X(J) = X(J)*A(J,J)
END IF
60 CONTINUE
ELSE
KX = KX + (N-1)*INCX
JX = KX
DO 80 J = N,1,-1
IF (X(JX).NE.ZERO) THEN
TEMP = X(JX)
IX = KX
DO 70 I = N,J + 1,-1
X(IX) = X(IX) + TEMP*A(I,J)
IX = IX - INCX
70 CONTINUE
IF (NOUNIT) X(JX) = X(JX)*A(J,J)
END IF
JX = JX - INCX
80 CONTINUE
END IF
END IF
ELSE
IF (LSAME(UPLO,'U')) THEN
IF (INCX.EQ.1) THEN
DO 110 J = N,1,-1
TEMP = X(J)
IF (NOCONJ) THEN
IF (NOUNIT) TEMP = TEMP*A(J,J)
DO 90 I = J - 1,1,-1
TEMP = TEMP + A(I,J)*X(I)
90 CONTINUE
ELSE
IF (NOUNIT) TEMP = TEMP*DCONJG(A(J,J))
DO 100 I = J - 1,1,-1
TEMP = TEMP + DCONJG(A(I,J))*X(I)
100 CONTINUE
END IF
X(J) = TEMP
110 CONTINUE
ELSE
JX = KX + (N-1)*INCX
DO 140 J = N,1,-1
TEMP = X(JX)
IX = JX
IF (NOCONJ) THEN
IF (NOUNIT) TEMP = TEMP*A(J,J)
DO 120 I = J - 1,1,-1
IX = IX - INCX
TEMP = TEMP + A(I,J)*X(IX)
120 CONTINUE
ELSE
IF (NOUNIT) TEMP = TEMP*DCONJG(A(J,J))
DO 130 I = J - 1,1,-1
IX = IX - INCX
TEMP = TEMP + DCONJG(A(I,J))*X(IX)
130 CONTINUE
END IF
X(JX) = TEMP
JX = JX - INCX
140 CONTINUE
END IF
ELSE
IF (INCX.EQ.1) THEN
DO 170 J = 1,N
TEMP = X(J)
IF (NOCONJ) THEN
IF (NOUNIT) TEMP = TEMP*A(J,J)
DO 150 I = J + 1,N
TEMP = TEMP + A(I,J)*X(I)
150 CONTINUE
ELSE
IF (NOUNIT) TEMP = TEMP*DCONJG(A(J,J))
DO 160 I = J + 1,N
TEMP = TEMP + DCONJG(A(I,J))*X(I)
160 CONTINUE
END IF
X(J) = TEMP
170 CONTINUE
ELSE
JX = KX
DO 200 J = 1,N
TEMP = X(JX)
IX = JX
IF (NOCONJ) THEN
IF (NOUNIT) TEMP = TEMP*A(J,J)
DO 180 I = J + 1,N
IX = IX + INCX
TEMP = TEMP + A(I,J)*X(IX)
180 CONTINUE
ELSE
IF (NOUNIT) TEMP = TEMP*DCONJG(A(J,J))
DO 190 I = J + 1,N
IX = IX + INCX
TEMP = TEMP + DCONJG(A(I,J))*X(IX)
190 CONTINUE
END IF
X(JX) = TEMP
JX = JX + INCX
200 CONTINUE
END IF
END IF
END IF
RETURN
END