* bignum.c (bigmul0): disable big_mul_toom3_temporalily.

  [ruby-core:48552] [Bug #7242]

* test/ruby/test_bignum.rb (test_mul_large_numbers):
  add a test for bigmul1_toom3 suggested in [Bug #7242].

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37565 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 7 deletions

diff --git a/bignum.c b/bignum.c
index d30f89eff4..d2e5f944ac 100644
--- a/bignum.c
+++ b/bignum.c
@@ -2617,13 +2617,8 @@ bigmul0(VALUE x, VALUE y)
     /* balance multiplication by slicing y when x is much smaller than y */
     if (2 * xn <= yn) return bigmul1_balance(x, y);
 
-    if (xn < TOOM3_MUL_DIGITS) {
-	/* multiplication by karatsuba method */
-	return bigmul1_karatsuba(x, y);
-    }
-    else if (3*xn <= 2*(yn + 2))
-	return bigmul1_balance(x, y);
-    return bigmul1_toom3(x, y);
+    /* multiplication by karatsuba method */
+    return bigmul1_karatsuba(x, y);
 }
 
 /*