llvm/libc/src/__support/HashTable/generic/bitmask_impl.inc

//===-- HashTable BitMasks Generic Implementation ---------------*- 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/__support/common.h"
#include "src/__support/endian.h"
#include "src/__support/macros/config.h"

namespace LIBC_NAMESPACE_DECL {
namespace internal {

// GPU architectures are 64-bit but use 32-bit general purpose registers.
#ifdef LIBC_TARGET_ARCH_IS_GPU
using bitmask_t = uint32_t;
#else
bitmask_t;
#endif

// Helper function to spread a byte across the whole word.
// Accumutively, the procedure looks like:
//    byte                  = 0x00000000000000ff
//    byte | (byte << 8)    = 0x000000000000ffff
//    byte | (byte << 16)   = 0x00000000ffffffff
//    byte | (byte << 32)   = 0xffffffffffffffff
LIBC_INLINE constexpr bitmask_t repeat_byte(bitmask_t byte) { … }

BitMask;
IteratableBitMask;

struct Group { … };
} // namespace internal
} // namespace LIBC_NAMESPACE_DECL