| // 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. |
| |
| // This file is the central location for defining the int128 type |
| // used by Kudu. Though this file is small it ensures flexibility |
| // as choices and standards around int128 change. |
| #pragma once |
| |
| // __int128 is not supported before gcc 4.6 |
| #if defined(__clang__) || \ |
| (defined(__GNUC__) && \ |
| (__GNUC__ * 10000 + __GNUC_MINOR__ * 100) >= 40600) |
| #define KUDU_INT128_SUPPORTED 1 |
| #else |
| #define KUDU_INT128_SUPPORTED 0 |
| #endif |
| |
| #if KUDU_INT128_SUPPORTED |
| namespace kudu { |
| |
| typedef unsigned __int128 uint128_t; |
| typedef signed __int128 int128_t; |
| |
| // Note: We don't use numeric_limits because it can give incorrect |
| // values for __int128 and unsigned __int128. |
| static const uint128_t UINT128_MIN = (uint128_t) 0; |
| static const uint128_t UINT128_MAX = ((uint128_t) -1); |
| static const int128_t INT128_MAX = ((int128_t)(UINT128_MAX >> 1)); |
| static const int128_t INT128_MIN = (-INT128_MAX - 1); |
| |
| } // namespace kudu |
| #endif |
