ScaLAPACK 2.1  2.1
ScaLAPACK: Scalable Linear Algebra PACKage
dlatcpy.f
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1  SUBROUTINE dlatcpy( UPLO, M, N, A, LDA, B, LDB )
2 *
3 *
4 * .. Scalar Arguments ..
5  CHARACTER UPLO
6  INTEGER LDA, LDB, M, N
7 * ..
8 * .. Array Arguments ..
9  DOUBLE PRECISION A( LDA, * ), B( LDB, * )
10 * ..
11 *
12 * Purpose
13 * =======
14 *
15 * DLATCPY copies all or part of a two-dimensional matrix A to another
16 * matrix B in transpose form.
17 *
18 * Arguments
19 * =========
20 *
21 * UPLO (input) CHARACTER*1
22 * Specifies the part of the matrix A to be copied to B.
23 * = 'U': Upper triangular part
24 * = 'L': Lower triangular part
25 * Otherwise: All of the matrix A
26 *
27 * M (input) INTEGER
28 * The number of rows of the matrix A. M >= 0.
29 *
30 * N (input) INTEGER
31 * The number of columns of the matrix A. N >= 0.
32 *
33 * A (input) DOUBLE PRECISION array, dimension (LDA,N)
34 * The m by n matrix A. If UPLO = 'U', only the upper triangle
35 * or trapezoid is accessed; if UPLO = 'L', only the lower
36 * triangle or trapezoid is accessed.
37 *
38 * LDA (input) INTEGER
39 * The leading dimension of the array A. LDA >= max(1,M).
40 *
41 * B (output) DOUBLE PRECISION array, dimension (LDB,M)
42 * On exit, B = A^T in the locations specified by UPLO.
43 *
44 * LDB (input) INTEGER
45 * The leading dimension of the array B. LDB >= max(1,N).
46 *
47 * =====================================================================
48 *
49 * .. Local Scalars ..
50  INTEGER I, J
51 * ..
52 * .. External Functions ..
53  LOGICAL LSAME
54  EXTERNAL lsame
55 * ..
56 * .. Intrinsic Functions ..
57  INTRINSIC min
58 *
59 * ..
60 * .. Executable Statements ..
61 *
62  IF( lsame( uplo, 'U' ) ) THEN
63  DO 20 j = 1, n
64  DO 10 i = 1, min( j, m )
65  b( j, i ) = a( i, j )
66  10 CONTINUE
67  20 CONTINUE
68  ELSE IF( lsame( uplo, 'L' ) ) THEN
69  DO 40 j = 1, n
70  DO 30 i = j, m
71  b( j, i ) = a( i, j )
72  30 CONTINUE
73  40 CONTINUE
74  ELSE
75  DO 60 j = 1, n
76  DO 50 i = 1, m
77  b( j, i ) = a( i, j )
78  50 CONTINUE
79  60 CONTINUE
80  END IF
81  RETURN
82 *
83 * End of DLATCPY
84 *
85  END
dlatcpy
subroutine dlatcpy(UPLO, M, N, A, LDA, B, LDB)
Definition: dlatcpy.f:2
min
#define min(A, B)
Definition: pcgemr.c:181