| /* byteorder.h - Byte order helpers */ |
| |
| /* |
| * Copyright (c) 2015, Intel Corporation. |
| * |
| * Licensed 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. |
| */ |
| |
| #define bswap_16(x) ((uint16_t) ((((x) >> 8) & 0xff) | (((x) & 0xff) << 8))) |
| |
| #define bswap_32(x) ((uint32_t) ((((x) >> 24) & 0xff) | (((x) >> 8) & 0xff00) \ |
| | (((x) & 0xff00) << 8) | (((x) & 0xff) << 24))) |
| |
| #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ |
| #define sys_le16_to_cpu(val) (val) |
| #define sys_cpu_to_le16(val) (val) |
| #define sys_be16_to_cpu(val) bswap_16(val) |
| #define sys_cpu_to_be16(val) bswap_16(val) |
| #define sys_le32_to_cpu(val) (val) |
| #define sys_cpu_to_le32(val) (val) |
| #define sys_be32_to_cpu(val) bswap_32(val) |
| #define sys_cpu_to_be32(val) bswap_32(val) |
| #elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ |
| #define sys_le16_to_cpu(val) bswap_16(val) |
| #define sys_cpu_to_le16(val) bswap_16(val) |
| #define sys_be16_to_cpu(val) (val) |
| #define sys_cpu_to_be16(val) (val) |
| #define sys_le32_to_cpu(val) bswap_32(val) |
| #define sys_cpu_to_le32(val) bswap_32(val) |
| #define sys_be32_to_cpu(val) (val) |
| #define sys_cpu_to_be32(val) (val) |
| #else |
| #error "Unknown byte order" |
| #endif |