1: DOUBLE PRECISION FUNCTION DZASUM(N,ZX,INCX)
2: * .. Scalar Arguments ..
3: INTEGER INCX,N
4: * ..
5: * .. Array Arguments ..
6: DOUBLE COMPLEX ZX(*)
7: * ..
8: *
9: * Purpose
10: * =======
11: *
12: * DZASUM takes the sum of the absolute values.
13: *
14: * Further Details
15: * ===============
16: *
17: * jack dongarra, 3/11/78.
18: * modified 3/93 to return if incx .le. 0.
19: * modified 12/3/93, array(1) declarations changed to array(*)
20: *
21: * =====================================================================
22: *
23: * .. Local Scalars ..
24: DOUBLE PRECISION STEMP
25: INTEGER I,IX
26: * ..
27: * .. External Functions ..
28: DOUBLE PRECISION DCABS1
29: EXTERNAL DCABS1
30: * ..
31: DZASUM = 0.0d0
32: STEMP = 0.0d0
33: IF (N.LE.0 .OR. INCX.LE.0) RETURN
34: IF (INCX.EQ.1) GO TO 20
35: *
36: * code for increment not equal to 1
37: *
38: IX = 1
39: DO 10 I = 1,N
40: STEMP = STEMP + DCABS1(ZX(IX))
41: IX = IX + INCX
42: 10 CONTINUE
43: DZASUM = STEMP
44: RETURN
45: *
46: * code for increment equal to 1
47: *
48: 20 DO 30 I = 1,N
49: STEMP = STEMP + DCABS1(ZX(I))
50: 30 CONTINUE
51: DZASUM = STEMP
52: RETURN
53: END
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