LAPACK 3.11.0 LAPACK: Linear Algebra PACKage
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icopy.f
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1*> \brief \b ICOPY
2*
3* =========== DOCUMENTATION ===========
4*
5* Online html documentation available at
6* http://www.netlib.org/lapack/explore-html/
7*
8* Definition:
9* ===========
10*
11* SUBROUTINE ICOPY( N, SX, INCX, SY, INCY )
12*
13* .. Scalar Arguments ..
14* INTEGER INCX, INCY, N
15* ..
16* .. Array Arguments ..
17* INTEGER SX( * ), SY( * )
18* ..
19*
20*
21*> \par Purpose:
22* =============
23*>
24*> \verbatim
25*>
26*> ICOPY copies an integer vector x to an integer vector y.
27*> Uses unrolled loops for increments equal to 1.
28*> \endverbatim
29*
30* Arguments:
31* ==========
32*
33*> \param[in] N
34*> \verbatim
35*> N is INTEGER
36*> The length of the vectors SX and SY.
37*> \endverbatim
38*>
39*> \param[in] SX
40*> \verbatim
41*> SX is INTEGER array, dimension (1+(N-1)*abs(INCX))
42*> The vector X.
43*> \endverbatim
44*>
45*> \param[in] INCX
46*> \verbatim
47*> INCX is INTEGER
48*> The spacing between consecutive elements of SX.
49*> \endverbatim
50*>
51*> \param[out] SY
52*> \verbatim
53*> SY is INTEGER array, dimension (1+(N-1)*abs(INCY))
54*> The vector Y.
55*> \endverbatim
56*>
57*> \param[in] INCY
58*> \verbatim
59*> INCY is INTEGER
60*> The spacing between consecutive elements of SY.
61*> \endverbatim
62*
63* Authors:
64* ========
65*
66*> \author Univ. of Tennessee
67*> \author Univ. of California Berkeley
68*> \author Univ. of Colorado Denver
69*> \author NAG Ltd.
70*
71*> \ingroup aux_lin
72*
73* =====================================================================
74 SUBROUTINE icopy( N, SX, INCX, SY, INCY )
75*
76* -- LAPACK test routine --
77* -- LAPACK is a software package provided by Univ. of Tennessee, --
78* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
79*
80* .. Scalar Arguments ..
81 INTEGER INCX, INCY, N
82* ..
83* .. Array Arguments ..
84 INTEGER SX( * ), SY( * )
85* ..
86*
87* =====================================================================
88*
89* .. Local Scalars ..
90 INTEGER I, IX, IY, M, MP1
91* ..
92* .. Intrinsic Functions ..
93 INTRINSIC mod
94* ..
95* .. Executable Statements ..
96*
97 IF( n.LE.0 )
98 \$ RETURN
99 IF( incx.EQ.1 .AND. incy.EQ.1 )
100 \$ GO TO 20
101*
102* Code for unequal increments or equal increments not equal to 1
103*
104 ix = 1
105 iy = 1
106 IF( incx.LT.0 )
107 \$ ix = ( -n+1 )*incx + 1
108 IF( incy.LT.0 )
109 \$ iy = ( -n+1 )*incy + 1
110 DO 10 i = 1, n
111 sy( iy ) = sx( ix )
112 ix = ix + incx
113 iy = iy + incy
114 10 CONTINUE
115 RETURN
116*
117* Code for both increments equal to 1
118*
119* Clean-up loop
120*
121 20 CONTINUE
122 m = mod( n, 7 )
123 IF( m.EQ.0 )
124 \$ GO TO 40
125 DO 30 i = 1, m
126 sy( i ) = sx( i )
127 30 CONTINUE
128 IF( n.LT.7 )
129 \$ RETURN
130 40 CONTINUE
131 mp1 = m + 1
132 DO 50 i = mp1, n, 7
133 sy( i ) = sx( i )
134 sy( i+1 ) = sx( i+1 )
135 sy( i+2 ) = sx( i+2 )
136 sy( i+3 ) = sx( i+3 )
137 sy( i+4 ) = sx( i+4 )
138 sy( i+5 ) = sx( i+5 )
139 sy( i+6 ) = sx( i+6 )
140 50 CONTINUE
141 RETURN
142*
143* End of ICOPY
144*
145 END
subroutine icopy(N, SX, INCX, SY, INCY)
ICOPY
Definition: icopy.f:75