LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
Loading...
Searching...
No Matches
slag2d.f
Go to the documentation of this file.
1*> \brief \b SLAG2D converts a single precision matrix to a double precision matrix.
2*
3* =========== DOCUMENTATION ===========
4*
5* Online html documentation available at
6* http://www.netlib.org/lapack/explore-html/
7*
8*> \htmlonly
9*> Download SLAG2D + dependencies
10*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/slag2d.f">
11*> [TGZ]</a>
12*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/slag2d.f">
13*> [ZIP]</a>
14*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/slag2d.f">
15*> [TXT]</a>
16*> \endhtmlonly
17*
18* Definition:
19* ===========
20*
21* SUBROUTINE SLAG2D( M, N, SA, LDSA, A, LDA, INFO )
22*
23* .. Scalar Arguments ..
24* INTEGER INFO, LDA, LDSA, M, N
25* ..
26* .. Array Arguments ..
27* REAL SA( LDSA, * )
28* DOUBLE PRECISION A( LDA, * )
29* ..
30*
31*
32*> \par Purpose:
33* =============
34*>
35*> \verbatim
36*>
37*> SLAG2D converts a SINGLE PRECISION matrix, SA, to a DOUBLE
38*> PRECISION matrix, A.
39*>
40*> Note that while it is possible to overflow while converting
41*> from double to single, it is not possible to overflow when
42*> converting from single to double.
43*>
44*> This is an auxiliary routine so there is no argument checking.
45*> \endverbatim
46*
47* Arguments:
48* ==========
49*
50*> \param[in] M
51*> \verbatim
52*> M is INTEGER
53*> The number of lines of the matrix A. M >= 0.
54*> \endverbatim
55*>
56*> \param[in] N
57*> \verbatim
58*> N is INTEGER
59*> The number of columns of the matrix A. N >= 0.
60*> \endverbatim
61*>
62*> \param[in] SA
63*> \verbatim
64*> SA is REAL array, dimension (LDSA,N)
65*> On entry, the M-by-N coefficient matrix SA.
66*> \endverbatim
67*>
68*> \param[in] LDSA
69*> \verbatim
70*> LDSA is INTEGER
71*> The leading dimension of the array SA. LDSA >= max(1,M).
72*> \endverbatim
73*>
74*> \param[out] A
75*> \verbatim
76*> A is DOUBLE PRECISION array, dimension (LDA,N)
77*> On exit, the M-by-N coefficient matrix A.
78*> \endverbatim
79*>
80*> \param[in] LDA
81*> \verbatim
82*> LDA is INTEGER
83*> The leading dimension of the array A. LDA >= max(1,M).
84*> \endverbatim
85*>
86*> \param[out] INFO
87*> \verbatim
88*> INFO is INTEGER
89*> = 0: successful exit
90*> \endverbatim
91*
92* Authors:
93* ========
94*
95*> \author Univ. of Tennessee
96*> \author Univ. of California Berkeley
97*> \author Univ. of Colorado Denver
98*> \author NAG Ltd.
99*
100*> \ingroup OTHERauxiliary
101*
102* =====================================================================
103 SUBROUTINE slag2d( M, N, SA, LDSA, A, LDA, INFO )
104*
105* -- LAPACK auxiliary routine --
106* -- LAPACK is a software package provided by Univ. of Tennessee, --
107* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
108*
109* .. Scalar Arguments ..
110 INTEGER INFO, LDA, LDSA, M, N
111* ..
112* .. Array Arguments ..
113 REAL SA( LDSA, * )
114 DOUBLE PRECISION A( LDA, * )
115* ..
116*
117* =====================================================================
118*
119* .. Local Scalars ..
120 INTEGER I, J
121* ..
122* .. Executable Statements ..
123*
124 info = 0
125 DO 20 j = 1, n
126 DO 10 i = 1, m
127 a( i, j ) = sa( i, j )
128 10 CONTINUE
129 20 CONTINUE
130 RETURN
131*
132* End of SLAG2D
133*
134 END
subroutine slag2d(M, N, SA, LDSA, A, LDA, INFO)
SLAG2D converts a single precision matrix to a double precision matrix.
Definition: slag2d.f:104