diff --git a/testcrate/build.rs b/testcrate/build.rs
index 171c1d52..868d8700 100644
--- a/testcrate/build.rs
+++ b/testcrate/build.rs
@@ -75,6 +75,7 @@ fn main() {
         || target.arch == "powerpc"
         || target.arch == "powerpc64"
         || target.arch == "powerpc64le"
+        || target.arch == "loongarch64"
         || (target.arch == "x86" && !target.has_feature("sse"))
         || target.os == "windows"
         // Linking says "error: function signature mismatch: __extendhfsf2" and seems to
diff --git a/testcrate/tests/conv.rs b/testcrate/tests/conv.rs
index f94aaf17..d7066354 100644
--- a/testcrate/tests/conv.rs
+++ b/testcrate/tests/conv.rs
@@ -306,7 +306,11 @@ mod extend {
     }
 
     #[cfg(all(f16_enabled, f128_enabled))]
-    #[cfg(not(any(target_arch = "powerpc", target_arch = "powerpc64")))]
+    #[cfg(not(any(
+        target_arch = "powerpc",
+        target_arch = "powerpc64",
+        target_arch = "loongarch64"
+    )))]
     f_to_f! {
         extend,
         f16 => f32, Half => Single, __extendhfsf2, not(feature = "no-sys-f16");
@@ -336,7 +340,11 @@ mod trunc {
     }
 
     #[cfg(all(f16_enabled, f128_enabled))]
-    #[cfg(not(any(target_arch = "powerpc", target_arch = "powerpc64")))]
+    #[cfg(not(any(
+        target_arch = "powerpc",
+        target_arch = "powerpc64",
+        target_arch = "loongarch64"
+    )))]
     f_to_f! {
         trunc,
         f32 => f16, Single => Half, __truncsfhf2, not(feature = "no-sys-f16");