01:       SUBROUTINE CAXPY(N,CA,CX,INCX,CY,INCY)
02: *     .. Scalar Arguments ..
03:       COMPLEX CA
04:       INTEGER INCX,INCY,N
05: *     ..
06: *     .. Array Arguments ..
07:       COMPLEX CX(*),CY(*)
08: *     ..
09: *
10: *  Purpose
11: *  =======
12: *
13: *     CAXPY constant times a vector plus a vector.
14: *
15: *  Further Details
16: *  ===============
17: *
18: *     jack dongarra, linpack, 3/11/78.
19: *     modified 12/3/93, array(1) declarations changed to array(*)
20: *
21: *  =====================================================================
22: *
23: *     .. Local Scalars ..
24:       INTEGER I,IX,IY
25: *     ..
26: *     .. External Functions ..
27:       REAL SCABS1
28:       EXTERNAL SCABS1
29: *     ..
30:       IF (N.LE.0) RETURN
31:       IF (SCABS1(CA).EQ.0.0E+0) RETURN
32:       IF (INCX.EQ.1 .AND. INCY.EQ.1) GO TO 20
33: *
34: *        code for unequal increments or equal increments
35: *          not equal to 1
36: *
37:       IX = 1
38:       IY = 1
39:       IF (INCX.LT.0) IX = (-N+1)*INCX + 1
40:       IF (INCY.LT.0) IY = (-N+1)*INCY + 1
41:       DO 10 I = 1,N
42:           CY(IY) = CY(IY) + CA*CX(IX)
43:           IX = IX + INCX
44:           IY = IY + INCY
45:    10 CONTINUE
46:       RETURN
47: *
48: *        code for both increments equal to 1
49: *
50:    20 DO 30 I = 1,N
51:           CY(I) = CY(I) + CA*CX(I)
52:    30 CONTINUE
53:       RETURN
54:       END
55: