1 files changed, 9 insertions, 0 deletions
diff --git a/library/std_detect/src/detect/bit.rs b/library/std_detect/src/detect/bit.rs
new file mode 100644
index 00000000000..6f06c5523e4
--- /dev/null
+++ b/library/std_detect/src/detect/bit.rs
@@ -0,0 +1,9 @@
+//! Bit manipulation utilities.
+
+/// Tests the `bit` of `x`.
+#[allow(dead_code)]
+#[inline]
+pub(crate) fn test(x: usize, bit: u32) -> bool {
+    debug_assert!(bit < usize::BITS, "bit index out-of-bounds");
+    x & (1 << bit) != 0
+}