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author | akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2013-07-07 15:21:26 +0000 |
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committer | akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2013-07-07 15:21:26 +0000 |
commit | 1210743cad827155f4e2d4da9adbb8c1569a93a6 (patch) | |
tree | c06c134abc058bb7add5dd953b5d89d9654d8b06 /test | |
parent | c51615963af25a50e52cf933298d6405eb611d7a (diff) | |
download | ruby-1210743cad827155f4e2d4da9adbb8c1569a93a6.tar.gz |
* bignum.c (bary_mul_karatsuba): Unreachable code removed. Remove
several branches.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41826 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'test')
-rw-r--r-- | test/-ext-/bignum/test_mul.rb | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/test/-ext-/bignum/test_mul.rb b/test/-ext-/bignum/test_mul.rb index ad3b38febd..539b9cf138 100644 --- a/test/-ext-/bignum/test_mul.rb +++ b/test/-ext-/bignum/test_mul.rb @@ -6,6 +6,7 @@ class TestBignum < Test::Unit::TestCase SIZEOF_BDIGITS = Bignum::SIZEOF_BDIGITS BITSPERDIG = Bignum::BITSPERDIG + BDIGMAX = (1 << BITSPERDIG) - 1 def test_mul_normal x = (1 << BITSPERDIG) | 1 @@ -49,5 +50,47 @@ class TestBignum < Test::Unit::TestCase assert_equal(z, x.big_mul_karatsuba(y)) end + def test_mul_karatsuba_odd_y + x = (1 << BITSPERDIG) | 1 + y = (1 << (2*BITSPERDIG)) | 1 + assert_equal(x.big_mul_normal(y), x.big_mul_karatsuba(y)) + end + + def test_mul_karatsuba_odd_xy + x = (1 << (2*BITSPERDIG)) | 1 + y = (1 << (2*BITSPERDIG)) | 1 + assert_equal(x.big_mul_normal(y), x.big_mul_karatsuba(y)) + end + + def test_mul_karatsuba_x1_gt_x0 + x = (2 << BITSPERDIG) | 1 + y = (1 << BITSPERDIG) | 2 + assert_equal(x.big_mul_normal(y), x.big_mul_karatsuba(y)) + end + + def test_mul_karatsuba_y1_gt_y0 + x = (1 << BITSPERDIG) | 2 + y = (2 << BITSPERDIG) | 1 + assert_equal(x.big_mul_normal(y), x.big_mul_karatsuba(y)) + end + + def test_mul_karatsuba_x1_gt_x0_and_y1_gt_y0 + x = (2 << BITSPERDIG) | 1 + y = (2 << BITSPERDIG) | 1 + assert_equal(x.big_mul_normal(y), x.big_mul_karatsuba(y)) + end + + def test_mul_karatsuba_carry2 + x = (1 << BITSPERDIG) | BDIGMAX + y = (1 << BITSPERDIG) | BDIGMAX + assert_equal(x.big_mul_normal(y), x.big_mul_karatsuba(y)) + end + + def test_mul_karatsuba_borrow + x = (BDIGMAX << BITSPERDIG) | 1 + y = (BDIGMAX << BITSPERDIG) | 1 + assert_equal(x.big_mul_normal(y), x.big_mul_karatsuba(y)) + end + end end |