1/*===---- popcntintrin.h - POPCNT intrinsics -------------------------------===
 2 *
 3 * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 4 * See https://llvm.org/LICENSE.txt for license information.
 5 * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 6 *
 7 *===-----------------------------------------------------------------------===
 8 */
 9
10#ifndef __POPCNTINTRIN_H
11#define __POPCNTINTRIN_H
12
13/* Define the default attributes for the functions in this file. */
14#if defined(__cplusplus) && (__cplusplus >= 201103L)
15#define __DEFAULT_FN_ATTRS                                                     \
16  __attribute__((__always_inline__, __nodebug__,                               \
17                 __target__("popcnt"))) constexpr
18#else
19#define __DEFAULT_FN_ATTRS                                                     \
20  __attribute__((__always_inline__, __nodebug__, __target__("popcnt")))
21#endif
22
23/// Counts the number of bits in the source operand having a value of 1.
24///
25/// \headerfile <x86intrin.h>
26///
27/// This intrinsic corresponds to the <c> POPCNT </c> instruction.
28///
29/// \param __A
30///    An unsigned 32-bit integer operand.
31/// \returns A 32-bit integer containing the number of bits with value 1 in the
32///    source operand.
33static __inline__ int __DEFAULT_FN_ATTRS
34_mm_popcnt_u32(unsigned int __A)
35{
36  return __builtin_popcount(__A);
37}
38
39#ifdef __x86_64__
40/// Counts the number of bits in the source operand having a value of 1.
41///
42/// \headerfile <x86intrin.h>
43///
44/// This intrinsic corresponds to the <c> POPCNT </c> instruction.
45///
46/// \param __A
47///    An unsigned 64-bit integer operand.
48/// \returns A 64-bit integer containing the number of bits with value 1 in the
49///    source operand.
50static __inline__ long long __DEFAULT_FN_ATTRS
51_mm_popcnt_u64(unsigned long long __A)
52{
53  return __builtin_popcountll(__A);
54}
55#endif /* __x86_64__ */
56
57#undef __DEFAULT_FN_ATTRS
58
59#endif /* __POPCNTINTRIN_H */