diff --git a/crates/core_arch/src/x86/f16c.rs b/crates/core_arch/src/x86/f16c.rs
index 8b25fd65e8..e213c3d647 100644
--- a/crates/core_arch/src/x86/f16c.rs
+++ b/crates/core_arch/src/x86/f16c.rs
@@ -29,6 +29,7 @@ extern "unadjusted" {
 #[inline]
 #[target_feature(enable = "f16c")]
 #[cfg_attr(test, assert_instr("vcvtph2ps"))]
+#[stable(feature = "x86_f16c_intrinsics", since = "1.68.0")]
 pub unsafe fn _mm_cvtph_ps(a: __m128i) -> __m128 {
     transmute(llvm_vcvtph2ps_128(transmute(a)))
 }
@@ -38,6 +39,7 @@ pub unsafe fn _mm_cvtph_ps(a: __m128i) -> __m128 {
 #[inline]
 #[target_feature(enable = "f16c")]
 #[cfg_attr(test, assert_instr("vcvtph2ps"))]
+#[stable(feature = "x86_f16c_intrinsics", since = "1.68.0")]
 pub unsafe fn _mm256_cvtph_ps(a: __m128i) -> __m256 {
     transmute(llvm_vcvtph2ps_256(transmute(a)))
 }
@@ -57,6 +59,7 @@ pub unsafe fn _mm256_cvtph_ps(a: __m128i) -> __m256 {
 #[target_feature(enable = "f16c")]
 #[cfg_attr(test, assert_instr("vcvtps2ph", IMM_ROUNDING = 0))]
 #[rustc_legacy_const_generics(1)]
+#[stable(feature = "x86_f16c_intrinsics", since = "1.68.0")]
 pub unsafe fn _mm_cvtps_ph<const IMM_ROUNDING: i32>(a: __m128) -> __m128i {
     static_assert_imm3!(IMM_ROUNDING);
     let a = a.as_f32x4();
@@ -78,6 +81,7 @@ pub unsafe fn _mm_cvtps_ph<const IMM_ROUNDING: i32>(a: __m128) -> __m128i {
 #[target_feature(enable = "f16c")]
 #[cfg_attr(test, assert_instr("vcvtps2ph", IMM_ROUNDING = 0))]
 #[rustc_legacy_const_generics(1)]
+#[stable(feature = "x86_f16c_intrinsics", since = "1.68.0")]
 pub unsafe fn _mm256_cvtps_ph<const IMM_ROUNDING: i32>(a: __m256) -> __m128i {
     static_assert_imm3!(IMM_ROUNDING);
     let a = a.as_f32x8();
diff --git a/crates/std_detect/tests/x86-specific.rs b/crates/std_detect/tests/x86-specific.rs
index e481620c7c..6526278747 100644
--- a/crates/std_detect/tests/x86-specific.rs
+++ b/crates/std_detect/tests/x86-specific.rs
@@ -20,6 +20,7 @@ fn dump() {
     println!("sse4.2: {:?}", is_x86_feature_detected!("sse4.2"));
     println!("sse4a: {:?}", is_x86_feature_detected!("sse4a"));
     println!("sha: {:?}", is_x86_feature_detected!("sha"));
+    println!("f16c: {:?}", is_x86_feature_detected!("f16c"));
     println!("avx: {:?}", is_x86_feature_detected!("avx"));
     println!("avx2: {:?}", is_x86_feature_detected!("avx2"));
     println!("avx512f {:?}", is_x86_feature_detected!("avx512f"));
@@ -108,6 +109,7 @@ fn compare_with_cupid() {
     assert_eq!(is_x86_feature_detected!("sse4.2"), information.sse4_2());
     assert_eq!(is_x86_feature_detected!("sse4a"), information.sse4a());
     assert_eq!(is_x86_feature_detected!("sha"), information.sha());
+    assert_eq!(is_x86_feature_detected!("f16c"), information.f16c());
     assert_eq!(is_x86_feature_detected!("avx"), information.avx());
     assert_eq!(is_x86_feature_detected!("avx2"), information.avx2());
     assert_eq!(is_x86_feature_detected!("avx512f"), information.avx512f());