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+Sat Jul 13 22:58:16 2013 Tanaka Akira <akr@fsij.org>
+
+ * bignum.c (big_shift3): New function.
+ big_lshift and big_rshift are merged.
+ (big_shift2): New function.
+ (big_lshift): Use big_shift3.
+ (big_rshift): Ditto.
+ (check_shiftdown): Removed.
+ (rb_big_lshift): Use big_shift2 and big_shift3.
+ (rb_big_rshift): Ditto.
+ (big_lshift): Removed.
+ (big_rshift): Ditto.
+
Sat Jul 13 15:51:38 2013 Tanaka Akira <akr@fsij.org>
* bignum.c (bary_small_lshift): Use size_t instead of long.