1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
---
:name: dlarfx
:md5sum: 108ce4a0efb7326ffa867e146ae4ee94
:category: :subroutine
:arguments:
- side:
:type: char
:intent: input
- m:
:type: integer
:intent: input
- n:
:type: integer
:intent: input
- v:
:type: doublereal
:intent: input
:dims:
- m
- tau:
:type: doublereal
:intent: input
- c:
:type: doublereal
:intent: input/output
:dims:
- ldc
- n
- ldc:
:type: integer
:intent: input
- work:
:type: doublereal
:intent: workspace
:dims:
- "lsame_(&side,\"L\") ? n : lsame_(&side,\"R\") ? m : 0"
:substitutions: {}
:fortran_help: " SUBROUTINE DLARFX( SIDE, M, N, V, TAU, C, LDC, WORK )\n\n\
* Purpose\n\
* =======\n\
*\n\
* DLARFX applies a real elementary reflector H to a real m by n\n\
* matrix C, from either the left or the right. H is represented in the\n\
* form\n\
*\n\
* H = I - tau * v * v'\n\
*\n\
* where tau is a real scalar and v is a real vector.\n\
*\n\
* If tau = 0, then H is taken to be the unit matrix\n\
*\n\
* This version uses inline code if H has order < 11.\n\
*\n\n\
* Arguments\n\
* =========\n\
*\n\
* SIDE (input) CHARACTER*1\n\
* = 'L': form H * C\n\
* = 'R': form C * H\n\
*\n\
* M (input) INTEGER\n\
* The number of rows of the matrix C.\n\
*\n\
* N (input) INTEGER\n\
* The number of columns of the matrix C.\n\
*\n\
* V (input) DOUBLE PRECISION array, dimension (M) if SIDE = 'L'\n\
* or (N) if SIDE = 'R'\n\
* The vector v in the representation of H.\n\
*\n\
* TAU (input) DOUBLE PRECISION\n\
* The value tau in the representation of H.\n\
*\n\
* C (input/output) DOUBLE PRECISION array, dimension (LDC,N)\n\
* On entry, the m by n matrix C.\n\
* On exit, C is overwritten by the matrix H * C if SIDE = 'L',\n\
* or C * H if SIDE = 'R'.\n\
*\n\
* LDC (input) INTEGER\n\
* The leading dimension of the array C. LDA >= (1,M).\n\
*\n\
* WORK (workspace) DOUBLE PRECISION array, dimension\n\
* (N) if SIDE = 'L'\n\
* or (M) if SIDE = 'R'\n\
* WORK is not referenced if H has order < 11.\n\
*\n\n\
* =====================================================================\n\
*\n"
|
