fixup

HertzDevil · Sep 6, 2024 · f0167f1 · f0167f1
1 parent af7046d
commit f0167f1
Show file tree

Hide file tree

Showing 2 changed files with 7 additions and 5 deletions.
diff --git a/spec/std/big/big_float_spec.cr b/spec/std/big/big_float_spec.cr
@@ -346,10 +346,12 @@ describe "BigFloat" do
     it { assert_prints Float64::MAX.to_big_f.to_s, "1.79769313486231570815e+308" }
     it { assert_prints Float64::MIN_POSITIVE.to_big_f.to_s, "2.22507385850720138309e-308" }
 
-    # least power of two with a base-10 exponent greater than Int32::MAX
-    (2.to_big_f ** 7133786264).to_s.should end_with("e+2147483648")
-    # least power of two with a base-10 exponent less than Int32::MIN
-    (2.to_big_f ** -7133786264).to_s.should end_with("e-2147483649")
+    it { (2.to_big_f ** 7133786264).to_s.should end_with("e+2147483648") }  # least power of two with a base-10 exponent greater than Int32::MAX
+    it { (2.to_big_f ** -7133786264).to_s.should end_with("e-2147483649") } # least power of two with a base-10 exponent less than Int32::MIN
+    it { (10.to_big_f ** 3000000000 * 1.5).to_s.should end_with("e+3000000000") }
+    it { (10.to_big_f ** -3000000000 * 1.5).to_s.should end_with("e-3000000000") }
+    it { (10.to_big_f ** 10000000000 * 1.5).to_s.should end_with("e+10000000000") }
+    it { (10.to_big_f ** -10000000000 * 1.5).to_s.should end_with("e-10000000000") }
   end
 
   describe "#inspect" do

diff --git a/src/big/big_float.cr b/src/big/big_float.cr
@@ -462,7 +462,7 @@ struct BigFloat < Float
       # This value will be very close to an integer, which we then obtain with
       # `#round`.
       overflow_n = ((@mpf.@_mp_exp * Math.log10(256.0 ** sizeof(LibGMP::MpLimb)) - exponent10) / 256.0 ** sizeof(LibGMP::MpExp))
-      exponent10.to_i64 + overflow_n.to_i64 * (256_i64 ** sizeof(LibGMP::MpExp))
+      exponent10.to_i64 + overflow_n.round.to_i64 * (256_i64 ** sizeof(LibGMP::MpExp))
     {% end %}
   end