Add runtime feature detection for F16C

2 files changed, 9 insertions, 1 deletions

diff --git a/library/stdarch/crates/std_detect/src/detect/arch/x86.rs b/library/stdarch/crates/std_detect/src/detect/arch/x86.rs
index 45f2d5bfc87..da14ce5cf0f 100644
--- a/library/stdarch/crates/std_detect/src/detect/arch/x86.rs
+++ b/library/stdarch/crates/std_detect/src/detect/arch/x86.rs
@@ -62,6 +62,7 @@
 /// * `"avx512ifma"`
 /// * `"avx512vbmi"`
 /// * `"avx512vpopcntdq"`
+/// * `"f16c"`
 /// * `"fma"`
 /// * `"bmi1"`
 /// * `"bmi2"`
@@ -179,6 +180,10 @@ macro_rules! is_x86_feature_detected {
         cfg!(target_feature = "avx512vpopcntdq") || $crate::detect::check_for(
             $crate::detect::Feature::avx512_vpopcntdq)
     };
+    ("f16c") => {
+        cfg!(target_feature = "avx512f") || $crate::detect::check_for(
+            $crate::detect::Feature::f16c)
+    };
     ("fma") => {
         cfg!(target_feature = "fma") || $crate::detect::check_for(
             $crate::detect::Feature::fma)
@@ -309,6 +314,8 @@ pub enum Feature {
     /// AVX-512 VPOPCNTDQ (Vector Population Count Doubleword and
     /// Quadword)
     avx512_vpopcntdq,
+    /// F16C (Conversions between IEEE-754 `binary16` and `binary32` formats)
+    f16c,
     /// FMA (Fused Multiply Add)
     fma,
     /// BMI1 (Bit Manipulation Instructions 1)
diff --git a/library/stdarch/crates/std_detect/src/detect/os/x86.rs b/library/stdarch/crates/std_detect/src/detect/os/x86.rs
index ab0622106c8..e543d301c79 100644
--- a/library/stdarch/crates/std_detect/src/detect/os/x86.rs
+++ b/library/stdarch/crates/std_detect/src/detect/os/x86.rs
@@ -113,13 +113,14 @@ fn detect_features() -> cache::Initializer {
         };
 
         enable(proc_info_ecx, 0, Feature::sse3);
+        enable(proc_info_ecx, 1, Feature::pclmulqdq);
         enable(proc_info_ecx, 9, Feature::ssse3);
         enable(proc_info_ecx, 13, Feature::cmpxchg16b);
         enable(proc_info_ecx, 19, Feature::sse4_1);
         enable(proc_info_ecx, 20, Feature::sse4_2);
         enable(proc_info_ecx, 23, Feature::popcnt);
         enable(proc_info_ecx, 25, Feature::aes);
-        enable(proc_info_ecx, 1, Feature::pclmulqdq);
+        enable(proc_info_ecx, 29, Feature::f16c);
         enable(proc_info_ecx, 30, Feature::rdrand);
         enable(extended_features_ebx, 18, Feature::rdseed);
         enable(extended_features_ebx, 19, Feature::adx);