refine Integer#** and Float#**

* complex.c (rb_dbl_complex_polar): utility function, which
  returns more precise value in right angle cases.

* bignum.c (rb_big_pow): use rb_dbl_complex_polar().

* numeric.c (rb_float_pow, fix_pow): create a Complex by polar
  form.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63678 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 2 deletions

diff --git a/numeric.c b/numeric.c
index 30afc581fe..fe867f9fd3 100644
--- a/numeric.c
+++ b/numeric.c
@@ -1276,7 +1276,7 @@ rb_float_pow(VALUE x, VALUE y)
 	dx = RFLOAT_VALUE(x);
 	dy = RFLOAT_VALUE(y);
 	if (dx < 0 && dy != round(dy))
-	    return num_funcall1(rb_complex_raw1(x), idPow, y);
+	    return rb_dbl_complex_polar(pow(-dx, dy), dy);
     }
     else {
 	return rb_num_coerce_bin(x, y, idPow);
@@ -4010,7 +4010,7 @@ fix_pow(VALUE x, VALUE y)
 	if (a == 1) return DBL2NUM(1.0);
 	{
 	    if (a < 0 && dy != round(dy))
-		return num_funcall1(rb_complex_raw1(x), idPow, y);
+		return rb_dbl_complex_polar(pow(-(double)a, dy), dy);
 	    return DBL2NUM(pow((double)a, dy));
 	}
     }