[GitHub] [arrow] mapleFU commented on a diff in pull request #36073: GH-36036: [C++][Parquet] Implement Float16 logical type

["mapleFU (via GitHub)" <gi...@apache.org>]

mapleFU commented on code in PR #36073:
URL: https://github.com/apache/arrow/pull/36073#discussion_r1230337040


##########
cpp/src/parquet/float_internal.h:
##########
@@ -0,0 +1,61 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+#pragma once
+
+#include <cstdint>
+#include <cstring>
+
+#include "arrow/util/bit_util.h"
+#include "arrow/util/ubsan.h"
+#include "parquet/types.h"
+
+namespace parquet {
+
+struct float16 {
+  constexpr static uint16_t min() { return 0b1111101111111111; }
+  constexpr static uint16_t max() { return 0b0111101111111111; }

Review Comment:
   should it follow the `min` `max` lowest` ?



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