[arm64][turbofan] Fix implementation of Float64Min.

src/compiler/machine-operator.h

Index: src/compiler/machine-operator.h
diff --git a/src/compiler/machine-operator.h b/src/compiler/machine-operator.h
index 40a68b3df68d45442ff9d1f903a44f06d6d65683..7d4e9430ae8ae4e39718b98aa67e1aa31137db1c 100644
--- a/src/compiler/machine-operator.h
+++ b/src/compiler/machine-operator.h
@@ -74,6 +74,8 @@ class MachineOperatorBuilder final : public ZoneObject {
   // for operations that are unsupported by some back-ends.
   enum Flag {
     kNoFlags = 0u,
+    // Note that Float*Max behaves like `(a < b) ? b : a`, not like Math.max().
+    // Note that Float*Min behaves like `(a < b) ? a : b`, not like Math.min().
     kFloat32Max = 1u << 0,
     kFloat32Min = 1u << 1,
     kFloat64Max = 1u << 2,