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+Sun May 1 00:03:30 2016 NARUSE, Yui <naruse@ruby-lang.org>
+
+ * configure.in (__builtin_ctz): check.
+
+ * configure.in (__builtin_ctzll): check.
+
+ * internal.h (rb_popcount32): defined for ntz_int32.
+ it can use __builtin_popcount but this function is not used on
+ GCC environment because it uses __builtin_ctz.
+ When another function uses this, using __builtin_popcount
+ should be re-considered.
+
+ * internal.h (rb_popcount64): ditto.
+
+ * internal.h (ntz_int32): defined for ntz_intptr.
+
+ * internal.h (ntz_int64): defined for ntz_intptr.
+
+ * internal.h (ntz_intptr): defined as ntz for uintptr_t.
+
+ * string.c (search_nonascii): unroll and use ntz.
+
Sat Apr 30 21:54:13 2016 Tanaka Akira <akr@fsij.org>
* numeric.c (Init_Numeric): Gather Fixnum method definitions.