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-rw-r--r--lib/raid6/unroll.pl24
1 files changed, 24 insertions, 0 deletions
diff --git a/lib/raid6/unroll.pl b/lib/raid6/unroll.pl
new file mode 100644
index 000000000000..3acc710a20ea
--- /dev/null
+++ b/lib/raid6/unroll.pl
@@ -0,0 +1,24 @@
+#!/usr/bin/perl
+#
+# Take a piece of C code and for each line which contains the sequence $$
+# repeat n times with $ replaced by 0...n-1; the sequence $# is replaced
+# by the unrolling factor, and $* with a single $
+#
+
+($n) = @ARGV;
+$n += 0;
+
+while ( defined($line = <STDIN>) ) {
+ if ( $line =~ /\$\$/ ) {
+ $rep = $n;
+ } else {
+ $rep = 1;
+ }
+ for ( $i = 0 ; $i < $rep ; $i++ ) {
+ $tmp = $line;
+ $tmp =~ s/\$\$/$i/g;
+ $tmp =~ s/\$\#/$n/g;
+ $tmp =~ s/\$\*/\$/g;
+ print $tmp;
+ }
+}