01:       SUBROUTINE DLARTV( N, X, INCX, Y, INCY, C, S, INCC )
02: *
03: *  -- LAPACK auxiliary routine (version 3.2) --
04: *  -- LAPACK is a software package provided by Univ. of Tennessee,    --
05: *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
06: *     November 2006
07: *
08: *     .. Scalar Arguments ..
09:       INTEGER            INCC, INCX, INCY, N
10: *     ..
11: *     .. Array Arguments ..
12:       DOUBLE PRECISION   C( * ), S( * ), X( * ), Y( * )
13: *     ..
14: *
15: *  Purpose
16: *  =======
17: *
18: *  DLARTV applies a vector of real plane rotations to elements of the
19: *  real vectors x and y. For i = 1,2,...,n
20: *
21: *     ( x(i) ) := (  c(i)  s(i) ) ( x(i) )
22: *     ( y(i) )    ( -s(i)  c(i) ) ( y(i) )
23: *
24: *  Arguments
25: *  =========
26: *
27: *  N       (input) INTEGER
28: *          The number of plane rotations to be applied.
29: *
30: *  X       (input/output) DOUBLE PRECISION array,
31: *                         dimension (1+(N-1)*INCX)
32: *          The vector x.
33: *
34: *  INCX    (input) INTEGER
35: *          The increment between elements of X. INCX > 0.
36: *
37: *  Y       (input/output) DOUBLE PRECISION array,
38: *                         dimension (1+(N-1)*INCY)
39: *          The vector y.
40: *
41: *  INCY    (input) INTEGER
42: *          The increment between elements of Y. INCY > 0.
43: *
44: *  C       (input) DOUBLE PRECISION array, dimension (1+(N-1)*INCC)
45: *          The cosines of the plane rotations.
46: *
47: *  S       (input) DOUBLE PRECISION array, dimension (1+(N-1)*INCC)
48: *          The sines of the plane rotations.
49: *
50: *  INCC    (input) INTEGER
51: *          The increment between elements of C and S. INCC > 0.
52: *
53: *  =====================================================================
54: *
55: *     .. Local Scalars ..
56:       INTEGER            I, IC, IX, IY
57:       DOUBLE PRECISION   XI, YI
58: *     ..
59: *     .. Executable Statements ..
60: *
61:       IX = 1
62:       IY = 1
63:       IC = 1
64:       DO 10 I = 1, N
65:          XI = X( IX )
66:          YI = Y( IY )
67:          X( IX ) = C( IC )*XI + S( IC )*YI
68:          Y( IY ) = C( IC )*YI - S( IC )*XI
69:          IX = IX + INCX
70:          IY = IY + INCY
71:          IC = IC + INCC
72:    10 CONTINUE
73:       RETURN
74: *
75: *     End of DLARTV
76: *
77:       END
78: