Add a fixup pass for cpuid values when validating XML.

Author: hdevalence

crates/stdsimd-verify/tests/x86-intel.rs

@@ -273,15 +273,25 @@ fn matches(rust: &Function, intel: &Intrinsic) -> Result<(), String> {
             .flat_map(|c| c.to_lowercase())
             .collect::<String>();
 
+        // The XML file names IFMA as "avx512ifma52", while Rust calls
+        // it "avx512ifma".  Fix this mismatch by replacing the Intel
+        // name with the Rust name.
+        let fixup_cpuid = |cpuid: String| match cpuid.as_ref() {
+            "avx512ifma52" => String::from("avx512ifma"),
+            _ => cpuid,
+        };
+        let fixed_cpuid = fixup_cpuid(cpuid);
+
         let rust_feature = rust
             .target_feature
             .expect(&format!("no target feature listed for {}", rust.name));
-        if rust_feature.contains(&cpuid) {
+
+        if rust_feature.contains(&fixed_cpuid) {
             continue;
         }
         bail!(
             "intel cpuid `{}` not in `{}` for {}",
-            cpuid,
+            fixed_cpuid,
             rust_feature,
             rust.name
         )