diff --git a/crates/runtime/src/libcalls.rs b/crates/runtime/src/libcalls.rs
index 4dcb0963de..a7dfe0a723 100644
--- a/crates/runtime/src/libcalls.rs
+++ b/crates/runtime/src/libcalls.rs
@@ -67,6 +67,9 @@ use wasmtime_environ::wasm::{
     TableIndex,
 };
 
+const TOINT_32: f32 = 1.0 / f32::EPSILON;
+const TOINT_64: f64 = 1.0 / f64::EPSILON;
+
 /// Implementation of f32.ceil
 pub extern "C" fn wasmtime_f32_ceil(x: f32) -> f32 {
     x.ceil()
@@ -86,25 +89,14 @@ pub extern "C" fn wasmtime_f32_trunc(x: f32) -> f32 {
 #[allow(clippy::float_arithmetic, clippy::float_cmp)]
 pub extern "C" fn wasmtime_f32_nearest(x: f32) -> f32 {
     // Rust doesn't have a nearest function, so do it manually.
-    if x == 0.0 {
-        // Preserve the sign of zero.
+    // Nearest is either ceil or floor depending on which is nearest or even.
+    // This approach exploited round half to even default mode.
+    let i = x.to_bits();
+    let e = i >> 23 & 0xff;
+    if e >= 0x7f_u32 + 23 {
         x
     } else {
-        // Nearest is either ceil or floor depending on which is nearest or even.
-        let u = x.ceil();
-        let d = x.floor();
-        let um = (x - u).abs();
-        let dm = (x - d).abs();
-        if um < dm
-            || (um == dm && {
-                let h = u / 2.;
-                h.floor() == h
-            })
-        {
-            u
-        } else {
-            d
-        }
+        (x.abs() + TOINT_32 - TOINT_32).copysign(x)
     }
 }
 
@@ -162,25 +154,14 @@ pub extern "C" fn wasmtime_f64_trunc(x: f64) -> f64 {
 #[allow(clippy::float_arithmetic, clippy::float_cmp)]
 pub extern "C" fn wasmtime_f64_nearest(x: f64) -> f64 {
     // Rust doesn't have a nearest function, so do it manually.
-    if x == 0.0 {
-        // Preserve the sign of zero.
+    // Nearest is either ceil or floor depending on which is nearest or even.
+    // This approach exploited round half to even default mode.
+    let i = x.to_bits();
+    let e = i >> 52 & 0x7ff;
+    if e >= 0x3ff_u64 + 52 {
         x
     } else {
-        // Nearest is either ceil or floor depending on which is nearest or even.
-        let u = x.ceil();
-        let d = x.floor();
-        let um = (x - u).abs();
-        let dm = (x - d).abs();
-        if um < dm
-            || (um == dm && {
-                let h = u / 2.;
-                h.floor() == h
-            })
-        {
-            u
-        } else {
-            d
-        }
+        (x.abs() + TOINT_64 - TOINT_64).copysign(x)
     }
 }