1 files changed, 30 insertions, 0 deletions
diff --git a/vendor/compiler_builtins/libm/src/math/roundf.rs b/vendor/compiler_builtins/libm/src/math/roundf.rs
new file mode 100644
index 000000000..becdb5620
--- /dev/null
+++ b/vendor/compiler_builtins/libm/src/math/roundf.rs
@@ -0,0 +1,30 @@
+use super::copysignf;
+use super::truncf;
+use core::f32;
+
+#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)]
+pub fn roundf(x: f32) -> f32 {
+    truncf(x + copysignf(0.5 - 0.25 * f32::EPSILON, x))
+}
+
+// PowerPC tests are failing on LLVM 13: https://github.com/rust-lang/rust/issues/88520
+#[cfg(not(target_arch = "powerpc64"))]
+#[cfg(test)]
+mod tests {
+    use super::roundf;
+
+    #[test]
+    fn negative_zero() {
+        assert_eq!(roundf(-0.0_f32).to_bits(), (-0.0_f32).to_bits());
+    }
+
+    #[test]
+    fn sanity_check() {
+        assert_eq!(roundf(-1.0), -1.0);
+        assert_eq!(roundf(2.8), 3.0);
+        assert_eq!(roundf(-0.5), -1.0);
+        assert_eq!(roundf(0.5), 1.0);
+        assert_eq!(roundf(-1.5), -2.0);
+        assert_eq!(roundf(1.5), 2.0);
+    }
+}