1 files changed, 24 insertions, 0 deletions
diff --git a/library/std/src/f128.rs b/library/std/src/f128.rs
index 4710d7c50b4..491235a872e 100644
--- a/library/std/src/f128.rs
+++ b/library/std/src/f128.rs
@@ -7,5 +7,29 @@
 #[cfg(test)]
 mod tests;
 
+#[cfg(not(test))]
+use crate::intrinsics;
+
 #[unstable(feature = "f128", issue = "116909")]
 pub use core::f128::consts;
+
+#[cfg(not(test))]
+impl f128 {
+    /// Raises a number to an integer power.
+    ///
+    /// Using this function is generally faster than using `powf`.
+    /// It might have a different sequence of rounding operations than `powf`,
+    /// so the results are not guaranteed to agree.
+    ///
+    /// # Unspecified precision
+    ///
+    /// The precision of this function is non-deterministic. This means it varies by platform, Rust version, and
+    /// can even differ within the same execution from one invocation to the next.
+    #[inline]
+    #[rustc_allow_incoherent_impl]
+    #[unstable(feature = "f128", issue = "116909")]
+    #[must_use = "method returns a new number and does not mutate the original value"]
+    pub fn powi(self, n: i32) -> f128 {
+        unsafe { intrinsics::powif128(self, n) }
+    }
+}