1 files changed, 36 insertions, 0 deletions
diff --git a/library/compiler-builtins/libm/src/math/roundeven.rs b/library/compiler-builtins/libm/src/math/roundeven.rs
new file mode 100644
index 00000000000..6e621d7628f
--- /dev/null
+++ b/library/compiler-builtins/libm/src/math/roundeven.rs
@@ -0,0 +1,36 @@
+use super::support::{Float, Round};
+
+/// Round `x` to the nearest integer, breaking ties toward even. This is IEEE 754
+/// `roundToIntegralTiesToEven`.
+#[cfg(f16_enabled)]
+#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)]
+pub fn roundevenf16(x: f16) -> f16 {
+    roundeven_impl(x)
+}
+
+/// Round `x` to the nearest integer, breaking ties toward even. This is IEEE 754
+/// `roundToIntegralTiesToEven`.
+#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)]
+pub fn roundevenf(x: f32) -> f32 {
+    roundeven_impl(x)
+}
+
+/// Round `x` to the nearest integer, breaking ties toward even. This is IEEE 754
+/// `roundToIntegralTiesToEven`.
+#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)]
+pub fn roundeven(x: f64) -> f64 {
+    roundeven_impl(x)
+}
+
+/// Round `x` to the nearest integer, breaking ties toward even. This is IEEE 754
+/// `roundToIntegralTiesToEven`.
+#[cfg(f128_enabled)]
+#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)]
+pub fn roundevenf128(x: f128) -> f128 {
+    roundeven_impl(x)
+}
+
+#[inline]
+pub fn roundeven_impl<F: Float>(x: F) -> F {
+    super::generic::rint_round(x, Round::Nearest).val
+}