Enable some ilog2 tests as well

library/core/tests/num/int_log.rs

@@ -1,7 +1,4 @@
-//! This tests the `Integer::{ilog,log2,log10}` methods. These tests are in a
-//! separate file because there's both a large number of them, and not all tests
-//! can be run on Android. This is because in Android `ilog2` uses an imprecise
-//! approximation:https://github.com/rust-lang/rust/blob/4825e12fc9c79954aa0fe18f5521efa6c19c7539/src/libstd/sys/unix/android.rs#L27-L53
+//! Tests for the `Integer::{ilog,log2,log10}` methods.
 
 #[test]
 fn checked_ilog() {
@@ -48,6 +45,10 @@ fn checked_ilog2() {
     assert_eq!(0i8.checked_ilog2(), None);
     assert_eq!(0i16.checked_ilog2(), None);
 
+    assert_eq!(8192u16.checked_ilog2(), Some((8192f32).log2() as u32));
+    assert_eq!(32768u16.checked_ilog2(), Some((32768f32).log2() as u32));
+    assert_eq!(8192i16.checked_ilog2(), Some((8192f32).log2() as u32));
+
     for i in 1..=u8::MAX {
         assert_eq!(i.checked_ilog2(), Some((i as f32).log2() as u32), "checking {i}");
     }
@@ -77,15 +78,6 @@ fn checked_ilog2() {
     }
 }
 
-// Validate cases that fail on Android's imprecise float ilog2 implementation.
-#[test]
-#[cfg(not(target_os = "android"))]
-fn checked_ilog2_not_android() {
-    assert_eq!(8192u16.checked_ilog2(), Some((8192f32).log2() as u32));
-    assert_eq!(32768u16.checked_ilog2(), Some((32768f32).log2() as u32));
-    assert_eq!(8192i16.checked_ilog2(), Some((8192f32).log2() as u32));
-}
-
 #[test]
 fn checked_ilog10() {
     assert_eq!(0u8.checked_ilog10(), None);