01:       SUBROUTINE ZDSCAL(N,DA,ZX,INCX)
02: *     .. Scalar Arguments ..
03:       DOUBLE PRECISION DA
04:       INTEGER INCX,N
05: *     ..
06: *     .. Array Arguments ..
07:       DOUBLE COMPLEX ZX(*)
08: *     ..
09: *
10: *  Purpose
11: *  =======
12: *
13: *     ZDSCAL scales a vector by a constant.
14: *
15: *  Further Details
16: *  ===============
17: *
18: *     jack dongarra, 3/11/78.
19: *     modified 3/93 to return if incx .le. 0.
20: *     modified 12/3/93, array(1) declarations changed to array(*)
21: *
22: *  =====================================================================
23: *
24: *     .. Local Scalars ..
25:       INTEGER I,IX
26: *     ..
27: *     .. Intrinsic Functions ..
28:       INTRINSIC DCMPLX
29: *     ..
30:       IF (N.LE.0 .OR. INCX.LE.0) RETURN
31:       IF (INCX.EQ.1) GO TO 20
32: *
33: *        code for increment not equal to 1
34: *
35:       IX = 1
36:       DO 10 I = 1,N
37:           ZX(IX) = DCMPLX(DA,0.0d0)*ZX(IX)
38:           IX = IX + INCX
39:    10 CONTINUE
40:       RETURN
41: *
42: *        code for increment equal to 1
43: *
44:    20 DO 30 I = 1,N
45:           ZX(I) = DCMPLX(DA,0.0d0)*ZX(I)
46:    30 CONTINUE
47:       RETURN
48:       END
49: