[TRY] Completely refactor std_detect tests

+ Add `avx512pf` and `avx512er` to `cpuid.def`

Author: sayantn

.github/workflows/main.yml

@@ -40,6 +40,7 @@ jobs:
     name: Test
     runs-on: ${{ matrix.target.os }}
     strategy:
+      fail-fast: false
       matrix:
         profile:
         - dev

ci/docker/x86_64-unknown-linux-gnu-emulated/cpuid.def

@@ -29,7 +29,7 @@
 00000004 00000004 => 00000000 00000000 00000000 00000000
 00000005 ******** => 00000040 00000040 00000003 00042120 #MONITOR/MWAIT
 00000006 ******** => 00000077 00000002 00000001 00000000 #Thermal and Power
-00000007 00000000 => 00000001 f3bfbfbf bbc05ffe 03d55130 #Extended Features
+00000007 00000000 => 00000001 ffbfbfbf bbc05ffe 03d55130 #Extended Features
 00000007 00000001 => 88ee00bf 00000002 00000000 1d29cd3e
 00000008 ******** => 00000000 00000000 00000000 00000000
 00000009 ******** => 00000000 00000000 00000000 00000000 #Direct Cache

crates/std_detect/Cargo.toml

@@ -40,3 +40,6 @@ rustc-dep-of-std = [
     "compiler_builtins",
     "alloc",
 ]
+
+[lints.rust]
+unexpected_cfgs = {level = "warn", check-cfg = ['cfg(stdarch_test_everything)'] }

crates/std_detect/src/detect/macros.rs

@@ -140,6 +140,15 @@ macro_rules! features {
             )*
         }
 
+        #[test]
+        #[cfg($cfg)]
+        #[cfg(stdarch_test_everything)]
+        fn everything_present() {
+            $(
+                $crate::detect::check_for($crate::detect::Feature::$feature);
+            )*
+        }
+
         /// Each variant denotes a position in a bitset for a particular feature.
         ///
         /// PLEASE: do not use this, it is an implementation detail subject