| //===-- Implementation for memalignment -------------------------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "src/stdlib/memalignment.h" |
| #include "src/__support/CPP/bit.h" |
| #include "src/__support/common.h" |
| #include "src/__support/macros/config.h" |
| |
| namespace LIBC_NAMESPACE_DECL { |
| |
| LLVM_LIBC_FUNCTION(size_t, memalignment, (const void *p)) { |
| if (p == nullptr) |
| return 0; |
| |
| uintptr_t addr = reinterpret_cast<uintptr_t>(p); |
| |
| return size_t(1) << cpp::countr_zero(addr); |
| } |
| |
| } // namespace LIBC_NAMESPACE_DECL |
