diff --git a/Cargo.toml b/Cargo.toml
index 5980de7a4b..cd4560406b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -28,7 +28,7 @@ opt-level = 3
 
 [dev-dependencies]
 stdsimd-test = { version = "0.*", path = "stdsimd-test" }
-cupid = "0.4.0"
+cupid = "0.5.0"
 
 [features]
 std = []
diff --git a/src/nvptx/mod.rs b/src/nvptx/mod.rs
index 6f3e3ddfed..21248e3193 100644
--- a/src/nvptx/mod.rs
+++ b/src/nvptx/mod.rs
@@ -3,7 +3,8 @@
 //! These intrinsics form the foundation of the CUDA
 //! programming model.
 //!
-//! The reference is the [CUDA C Programming Guide][cuda_c]. Relevant is also the [LLVM NVPTX Backend documentation][llvm_docs].
+//! The reference is the [CUDA C Programming Guide][cuda_c]. Relevant is also
+//! the [LLVM NVPTX Backend documentation][llvm_docs].
 //!
 //! [cuda_c]:
 //! http://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html
diff --git a/src/runtime/x86.rs b/src/runtime/x86.rs
index ba3f8f8458..a9d88cf8c1 100644
--- a/src/runtime/x86.rs
+++ b/src/runtime/x86.rs
@@ -140,14 +140,6 @@ macro_rules! __unstable_detect_feature {
         $crate::vendor::__unstable_detect_feature(
             $crate::vendor::__Feature::xsaveopt{})
     };
-    ("xsave") => {
-        $crate::vendor::__unstable_detect_feature(
-            $crate::vendor::__Feature::xsave{})
-    };
-    ("xsaveopt") => {
-        $crate::vendor::__unstable_detect_feature(
-            $crate::vendor::__Feature::xsaveopt{})
-    };
     ("xsaves") => {
         $crate::vendor::__unstable_detect_feature(
             $crate::vendor::__Feature::xsaves{})
@@ -265,9 +257,9 @@ pub fn detect_features() -> usize {
     // leaf value for subsequent calls of `cpuinfo` in range [0,
     // 0x8000_0000]. - The vendor ID is stored in 12 u8 ascii chars,
     // returned in EBX, EDX, and   ECX (in that order):
-    let (max_leaf, vendor_id) = unsafe {
+    let (max_basic_leaf, vendor_id) = unsafe {
         let CpuidResult {
-            eax: max_leaf,
+            eax: max_basic_leaf,
             ebx,
             ecx,
             edx,
@@ -278,10 +270,10 @@ pub fn detect_features() -> usize {
             mem::transmute(ecx),
         ];
         let vendor_id: [u8; 12] = mem::transmute(vendor_id);
-        (max_leaf, vendor_id)
+        (max_basic_leaf, vendor_id)
     };
 
-    if max_leaf < 1 {
+    if max_basic_leaf < 1 {
         // Earlier Intel 486, CPUID not implemented
         return value;
     }
@@ -296,7 +288,8 @@ pub fn detect_features() -> usize {
 
     // EAX = 7, ECX = 0: Queries "Extended Features";
     // Contains information about bmi,bmi2, and avx2 support.
-    let (extended_features_ebx, extended_features_ecx) = if max_leaf >= 7 {
+    let (extended_features_ebx, extended_features_ecx) = if max_basic_leaf >= 7
+    {
         let CpuidResult { ebx, ecx, .. } = unsafe { __cpuid(0x0000_0007_u32) };
         (ebx, ecx)
     } else {
@@ -307,13 +300,13 @@ pub fn detect_features() -> usize {
     // - EAX returns the max leaf value for extended information, that is,
     // `cpuid` calls in range [0x8000_0000; u32::MAX]:
     let CpuidResult {
-        eax: extended_max_leaf,
+        eax: extended_max_basic_leaf,
         ..
     } = unsafe { __cpuid(0x8000_0000_u32) };
 
     // EAX = 0x8000_0001, ECX=0: Queries "Extended Processor Info and Feature
     // Bits"
-    let extended_proc_info_ecx = if extended_max_leaf >= 1 {
+    let extended_proc_info_ecx = if extended_max_basic_leaf >= 1 {
         let CpuidResult { ecx, .. } = unsafe { __cpuid(0x8000_0001_u32) };
         ecx
     } else {
@@ -393,7 +386,7 @@ pub fn detect_features() -> usize {
 
             // Processor Extended State Enumeration Sub-leaf (EAX = 0DH, ECX =
             // 1)
-            if max_leaf >= 0xd {
+            if max_basic_leaf >= 0xd {
                 let CpuidResult {
                     eax: proc_extended_state1_eax,
                     ..
diff --git a/tests/cpu-detection.rs b/tests/cpu-detection.rs
index c4b4c9627f..9bbb17500f 100644
--- a/tests/cpu-detection.rs
+++ b/tests/cpu-detection.rs
@@ -20,24 +20,24 @@ fn works() {
     assert_eq!(cfg_feature_enabled!("sse4.2"), information.sse4_2());
     assert_eq!(cfg_feature_enabled!("avx"), information.avx());
     assert_eq!(cfg_feature_enabled!("avx2"), information.avx2());
-    // assert_eq!(cfg_feature_enabled!("avx512f"), information.avx512f());
-    // assert_eq!(cfg_feature_enabled!("avx512cd"), information.avx512cd());
-    // assert_eq!(cfg_feature_enabled!("avx512er"), information.avx512er());
-    // assert_eq!(cfg_feature_enabled!("avx512pf"), information.avx512pf());
-    // assert_eq!(cfg_feature_enabled!("avx512bw"), information.avx512bw());
-    // assert_eq!(cfg_feature_enabled!("avx512dq"), information.avx512dq());
-    // assert_eq!(cfg_feature_enabled!("avx512vl"), information.avx512vl());
-    // assert_eq!(cfg_feature_enabled!("avx512ifma"),
-    // information.avx512_ifma());
-    // assert_eq!(cfg_feature_enabled!("avx512vbmi"),
-    // information.avx512_vbmi());
-    // assert_eq!(cfg_feature_enabled!("avx512vpopcntdq"),
-    // information.avx512_vpopcntdq());
+    assert_eq!(cfg_feature_enabled!("avx512f"), information.avx512f());
+    assert_eq!(cfg_feature_enabled!("avx512cd"), information.avx512cd());
+    assert_eq!(cfg_feature_enabled!("avx512er"), information.avx512er());
+    assert_eq!(cfg_feature_enabled!("avx512pf"), information.avx512pf());
+    assert_eq!(cfg_feature_enabled!("avx512bw"), information.avx512bw());
+    assert_eq!(cfg_feature_enabled!("avx512dq"), information.avx512dq());
+    assert_eq!(cfg_feature_enabled!("avx512vl"), information.avx512vl());
+    assert_eq!(cfg_feature_enabled!("avx512ifma"), information.avx512_ifma());
+    assert_eq!(cfg_feature_enabled!("avx512vbmi"), information.avx512_vbmi());
+    assert_eq!(
+        cfg_feature_enabled!("avx512vpopcntdq"),
+        information.avx512_vpopcntdq()
+    );
     assert_eq!(cfg_feature_enabled!("fma"), information.fma());
     assert_eq!(cfg_feature_enabled!("bmi"), information.bmi1());
     assert_eq!(cfg_feature_enabled!("bmi2"), information.bmi2());
     assert_eq!(cfg_feature_enabled!("popcnt"), information.popcnt());
-    // assert_eq!(cfg_feature_enabled!("sse4a"), information.sse4a());
+    assert_eq!(cfg_feature_enabled!("sse4a"), information.sse4a());
     assert_eq!(cfg_feature_enabled!("abm"), information.lzcnt());
     assert_eq!(cfg_feature_enabled!("tbm"), information.tbm());
     assert_eq!(cfg_feature_enabled!("lzcnt"), information.lzcnt());