Detect MOVBE (rust-lang#1356)

Author: calebzulawski

crates/std_detect/src/detect/arch/x86.rs

@@ -91,6 +91,7 @@ features! {
     /// * `"cmpxchg16b"`
     /// * `"adx"`
     /// * `"rtm"`
+    /// * `"movbe"`
     ///
     /// [docs]: https://software.intel.com/sites/landingpage/IntrinsicsGuide
     #[stable(feature = "simd_x86", since = "1.27.0")]
@@ -197,4 +198,6 @@ features! {
     /// ADX, Intel ADX (Multi-Precision Add-Carry Instruction Extensions)
     @FEATURE: #[stable(feature = "simd_x86", since = "1.27.0")] rtm: "rtm";
     /// RTM, Intel (Restricted Transactional Memory)
+    @FEATURE: #[stable(feature = "movbe_target_feature", since = "1.67.0")] movbe: "movbe";
+    /// MOVBE (Move Data After Swapping Bytes)
 }

crates/std_detect/src/detect/os/x86.rs

@@ -111,6 +111,7 @@ pub(crate) fn detect_features() -> cache::Initializer {
         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, 22, Feature::movbe);
         enable(proc_info_ecx, 23, Feature::popcnt);
         enable(proc_info_ecx, 25, Feature::aes);
         enable(proc_info_ecx, 29, Feature::f16c);

crates/std_detect/tests/cpu-detection.rs

@@ -152,6 +152,7 @@ fn x86_all() {
     println!("abm: {:?}", is_x86_feature_detected!("abm"));
     println!("lzcnt: {:?}", is_x86_feature_detected!("lzcnt"));
     println!("tbm: {:?}", is_x86_feature_detected!("tbm"));
+    println!("movbe: {:?}", is_x86_feature_detected!("movbe"));
     println!("popcnt: {:?}", is_x86_feature_detected!("popcnt"));
     println!("fxsr: {:?}", is_x86_feature_detected!("fxsr"));
     println!("xsave: {:?}", is_x86_feature_detected!("xsave"));

crates/std_detect/tests/x86-specific.rs

@@ -64,6 +64,7 @@ fn dump() {
     println!("cmpxchg16b: {:?}", is_x86_feature_detected!("cmpxchg16b"));
     println!("adx: {:?}", is_x86_feature_detected!("adx"));
     println!("rtm: {:?}", is_x86_feature_detected!("rtm"));
+    println!("movbe: {:?}", is_x86_feature_detected!("movbe"));
 }
 
 #[cfg(feature = "std_detect_env_override")]
@@ -152,4 +153,5 @@ fn compare_with_cupid() {
     );
     assert_eq!(is_x86_feature_detected!("adx"), information.adx(),);
     assert_eq!(is_x86_feature_detected!("rtm"), information.rtm(),);
+    assert_eq!(is_x86_feature_detected!("movbe"), information.movbe(),);
 }