File Coverage

/root/.cpan/build/PDL-CCS-1.23.11-0/blib/lib/PDL/CCS/Ops.pm
Criterion Covered Total %
statement 12 12 100.0
branch n/a
condition n/a
subroutine 4 4 100.0
pod n/a
total 16 16 100.0


line stmt bran cond sub pod time code
1              
2             #
3             # GENERATED WITH PDL::PP! Don't modify!
4             #
5             package PDL::CCS::Ops;
6              
7             @EXPORT_OK = qw( PDL::PP ccs_binop_align_block_mia );
8             %EXPORT_TAGS = (Func=>[@EXPORT_OK]);
9              
10 4     4   29 use PDL::Core;
  4         12  
  4         27  
11 4     4   1016 use PDL::Exporter;
  4         9  
  4         27  
12 4     4   122 use DynaLoader;
  4         9  
  4         325  
13              
14              
15              
16             $PDL::CCS::Ops::VERSION = 1.23.11;
17             @ISA = ( 'PDL::Exporter','DynaLoader' );
18             push @PDL::Core::PP, __PACKAGE__;
19             bootstrap PDL::CCS::Ops $VERSION;
20              
21              
22              
23              
24              
25             #use PDL::CCS::Version;
26 4     4   27 use strict;
  4         16  
  4         326  
27              
28             =pod
29              
30             =head1 NAME
31              
32             PDL::CCS::Ops - Low-level binary operations for compressed storage sparse PDLs
33              
34             =head1 SYNOPSIS
35              
36             use PDL;
37             use PDL::CCS::Utils;
38              
39             ##---------------------------------------------------------------------
40             ## ... stuff happens
41              
42             =cut
43              
44              
45              
46              
47              
48              
49              
50             =head1 FUNCTIONS
51              
52              
53              
54             =cut
55              
56              
57              
58              
59             *ccs_indx = \&PDL::indx; ##-- typecasting for CCS indices
60              
61              
62              
63              
64             =head2 ccs_binop_align_block_mia
65              
66             =for sig
67              
68             Signature: (
69             indx ixa(Ndims,NnzA); indx ixb(Ndims,NnzB); indx istate(State);
70             indx [o]nzai(NnzC); indx [o]nzbi(NnzC); indx [o]ostate(State);
71             )
72              
73              
74             Partially aligns a pair of lexicographically sorted index-vector lists C<$ixa()> and C<$ixb()>,
75             e.g. for block-wise incremental computation of binary operations over sparse index-encoded PDLs,
76             assuming missing indices correspond to annihilators.
77              
78             On return, the vectors C<$nzai> and C<$nzbi> hold indices into C and C
79             respectively, and are constructed such that:
80              
81             ($ixa(,$nzai->slice("0:$nzci_max")) == $ixb(,$nzbi->slice("0:$nzci_max"))
82              
83             At most C alignments are performed, and alignment ceases
84             as soon as any of the PDLs C<$ixa()>, C<$ixb()>, C<$nzai()>, or C<$nzbi()>
85             has been exhausted.
86              
87             The parameters C<$istate()> and C<$ostate()> hold the state of the algorithm,
88             for incremental block-wise computation at the perl level. Each state PDL
89             is a 7-element PDL containing the following values:
90              
91             INDEX LABEL DESCRIPTION
92             -----------------------------------------------------------------------
93             0 nnzai minimum offset in NnzA of current $ixa() value
94             1 nnzai_nxt minimum offset in NnzA of next $ixa() value
95             2 nnzbi minimum offset in NnzB of current $ixb() value
96             3 nnzbi_nxt minimum offset in NnzB of next $ixb() value
97             4 nnzci minimum offset in NnzC of current ($ixa(),$ixb()) value pair
98             5 nnzci_nxt minimum offset in NnzC of next ($ixa(),$ixb()) value pair
99             6 cmpval 3-way comparison value for current ($ixa(),$ixb()) value pair
100              
101             For computation of the first block, $istate() can be safely set to C.
102              
103             Repetitions may occur in input index PDLs C<$ixa()> and C<$ixb()>.
104             If an index-match occurs on such a "run", I of matching values are
105             added to the output PDLs.
106              
107             All alignments have been performed if:
108              
109             $ostate(0)==$NnzA && $ostate(1)==$NnzB
110              
111             B this alignment method ignores index-vectors which are not present
112             in I C<$ixa()> and C<$ixb()>, which is a Good Thing if your are feeding
113             the aligned values into an operation for which missing values are annihilators:
114              
115             $missinga * $bval == ($missinga * $missingb) for each $bval \in $b, and
116             $aval * $missingb == ($missinga * $missingb) for each $aval \in $a
117              
118             This ought to be the case for all operations if missing values are C (see L),
119             but might cause unexpected results if e.g. missing values are zero and the operation
120             in question is addition.
121              
122              
123              
124             =for bad
125              
126             ccs_binop_align_block_mia does not process bad values.
127             It will set the bad-value flag of all output piddles if the flag is set for any of the input piddles.
128              
129              
130             =cut
131              
132              
133              
134              
135              
136              
137             *ccs_binop_align_block_mia = \&PDL::ccs_binop_align_block_mia;
138              
139              
140              
141              
142             ##---------------------------------------------------------------------
143             =pod
144              
145             =head1 ACKNOWLEDGEMENTS
146              
147             Perl by Larry Wall.
148              
149             PDL by Karl Glazebrook, Tuomas J. Lukka, Christian Soeller, and others.
150              
151             =cut
152              
153             ##----------------------------------------------------------------------
154             =pod
155              
156             =head1 KNOWN BUGS
157              
158             No support for (pseudo)-threading.
159              
160             =cut
161              
162              
163             ##---------------------------------------------------------------------
164             =pod
165              
166             =head1 AUTHOR
167              
168             Bryan Jurish Emoocow@cpan.orgE
169              
170             =head2 Copyright Policy
171              
172             All other parts Copyright (C) 2007-2013, Bryan Jurish. All rights reserved.
173              
174             This package is free software, and entirely without warranty.
175             You may redistribute it and/or modify it under the same terms
176             as Perl itself.
177              
178             =head1 SEE ALSO
179              
180             perl(1), PDL(3perl)
181              
182             =cut
183              
184              
185              
186             ;
187              
188              
189              
190             # Exit with OK status
191              
192             1;
193              
194