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-rw-r--r--test/-ext-/bignum/test_mul.rb12
1 files changed, 12 insertions, 0 deletions
diff --git a/test/-ext-/bignum/test_mul.rb b/test/-ext-/bignum/test_mul.rb
index 539b9cf138..e125401664 100644
--- a/test/-ext-/bignum/test_mul.rb
+++ b/test/-ext-/bignum/test_mul.rb
@@ -43,6 +43,18 @@ class TestBignum < Test::Unit::TestCase
assert_equal(z, x.big_mul_balance(y))
end
+ def test_mul_balance_2x16
+ x = (1 << Bignum::BITSPERDIG) | 1
+ y = (1 << Bignum::BITSPERDIG*16) | 1
+ assert_equal(x.big_mul_normal(y), x.big_mul_balance(y))
+ end
+
+ def test_mul_balance_2x17
+ x = (1 << Bignum::BITSPERDIG) | 1
+ y = (1 << Bignum::BITSPERDIG*17) | 1
+ assert_equal(x.big_mul_normal(y), x.big_mul_balance(y))
+ end
+
def test_mul_karatsuba
x = (1 << BITSPERDIG) | 1
y = (1 << BITSPERDIG) | 1