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-rw-r--r--n/asserv/src/dsp_check.pl53
1 files changed, 53 insertions, 0 deletions
diff --git a/n/asserv/src/dsp_check.pl b/n/asserv/src/dsp_check.pl
new file mode 100644
index 0000000..69384e2
--- /dev/null
+++ b/n/asserv/src/dsp_check.pl
@@ -0,0 +1,53 @@
+#!/usr/bin/perl -w
+use strict;
+use POSIX qw(floor);
+
+my $fail = 0;
+
+sub check_mul
+{
+ my ($a, $b, $r) = @_;
+ $b = $b / 256;
+ my $m = floor ($a * $b);
+ if ($m > (1 << 15) - 1 || $m < -(1 << 15))
+ {
+ print "overflow $a * $b = $r ($m)\n";
+ }
+ elsif ($m == $r)
+ {
+ print "pass $a * $b = $r\n";
+ }
+ else
+ {
+ print "fail $a * $b = $r ($m)\n";
+ $fail = 1;
+ }
+}
+
+while (<>)
+{
+ chomp;
+ if (/^m (-?\d+) (\d+)$/)
+ {
+ my ($a, $b) = ($1, $2);
+ $_ = <>; chomp;
+ next unless (/^r (-?\d+)$/);
+ my $r = $1;
+ $_ = <>; chomp;
+ next unless (/^R (-?\d+)$/);
+ my $R = $1;
+ check_mul $a, $b, $r;
+ check_mul -$a, $b, $R;
+ }
+}
+
+if ($fail)
+{
+ print "test failled\n";
+ exit 1;
+}
+else
+{
+ print "test passed\n";
+ exit 0;
+}