| // Copyright 2020 The Fuchsia Authors |
| // |
| // Use of this source code is governed by a MIT-style |
| // license that can be found in the LICENSE file or at |
| // https://opensource.org/licenses/MIT |
| |
| #ifndef ZIRCON_KERNEL_LIB_ACPI_LITE_INCLUDE_LIB_ACPI_LITE_INTERNAL_H_ |
| #define ZIRCON_KERNEL_LIB_ACPI_LITE_INCLUDE_LIB_ACPI_LITE_INTERNAL_H_ |
| |
| #include <zircon/compiler.h> |
| #include <zircon/types.h> |
| |
| namespace acpi_lite { |
| |
| // Endian conversion macros. |
| // |
| // Convert between host and big-endian formats. |
| #ifndef __BYTE_ORDER__ |
| #error "Compiler does not provide __BYTE_ORDER__" |
| #endif |
| #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ |
| inline constexpr uint32_t HostToBe32(uint32_t x) { return x; } |
| inline constexpr uint32_t BeToHost32(uint32_t x) { return x; } |
| #else |
| inline constexpr uint32_t HostToBe32(uint32_t x) { return __builtin_bswap32(x); } |
| inline constexpr uint32_t BeToHost32(uint32_t x) { return __builtin_bswap32(x); } |
| #endif |
| |
| } // namespace acpi_lite |
| |
| #endif // ZIRCON_KERNEL_LIB_ACPI_LITE_INCLUDE_LIB_ACPI_LITE_INTERNAL_H_ |
