================
@@ -48,6 +48,19 @@ std::optional<AArch64::ArchInfo>
AArch64::ArchInfo::findBySubArch(StringRef SubA
return {};
}
+unsigned AArch64::getFMVPriority(ArrayRef<StringRef> Features) {
+ constexpr unsigned MaxFMVPriority = 1000;
+ unsigned Priority = 0;
+ unsigned NumFeatures = 0;
+ for (StringRef Feature : Features) {
+ if (auto Ext = parseFMVExtension(Feature)) {
+ Priority = std::max(Priority, Ext->Priority);
+ NumFeatures++;
+ }
+ }
+ return Priority + MaxFMVPriority * NumFeatures;
----------------
labrinea wrote:
> I'm not sure it does that correctly: I think simd+dotprod is weighted higher
> than sme with this algorithm purely because it has more features.
Exactly. `Priority(simd+dotprod) > Priority(sme) > Priority(simd) +
Priority(dotprod)`. That's intentional according to the current spec.
https://github.com/llvm/llvm-project/pull/116257
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