popcntintrin.h revision 314564 
1/*===---- popcntintrin.h - POPCNT intrinsics -------------------------------===
2 *
3 * Permission is hereby granted, free of charge, to any person obtaining a copy
4 * of this software and associated documentation files (the "Software"), to deal
5 * in the Software without restriction, including without limitation the rights
6 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
7 * copies of the Software, and to permit persons to whom the Software is
8 * furnished to do so, subject to the following conditions:
9 *
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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19 * THE SOFTWARE.
20 *
21 *===-----------------------------------------------------------------------===
22 */
23
24#ifndef _POPCNTINTRIN_H
25#define _POPCNTINTRIN_H
26
27/* Define the default attributes for the functions in this file. */
28#define __DEFAULT_FN_ATTRS __attribute__((__always_inline__, __nodebug__, __target__("popcnt")))
29
30/// \brief Counts the number of bits in the source operand having a value of 1.
31///
32/// \headerfile <x86intrin.h>
33///
34/// This intrinsic corresponds to the <c> POPCNT </c> instruction.
35///
36/// \param __A
37///    An unsigned 32-bit integer operand.
38/// \returns A 32-bit integer containing the number of bits with value 1 in the
39///    source operand.
40static __inline__ int __DEFAULT_FN_ATTRS
41_mm_popcnt_u32(unsigned int __A)
42{
43  return __builtin_popcount(__A);
44}
45
46/// \brief Counts the number of bits in the source operand having a value of 1.
47///
48/// \headerfile <x86intrin.h>
49///
50/// This intrinsic corresponds to the <c> POPCNT </c> instruction.
51///
52/// \param __A
53///    A signed 32-bit integer operand.
54/// \returns A 32-bit integer containing the number of bits with value 1 in the
55///    source operand.
56static __inline__ int __DEFAULT_FN_ATTRS
57_popcnt32(int __A)
58{
59  return __builtin_popcount(__A);
60}
61
62#ifdef __x86_64__
63/// \brief Counts the number of bits in the source operand having a value of 1.
64///
65/// \headerfile <x86intrin.h>
66///
67/// This intrinsic corresponds to the <c> POPCNT </c> instruction.
68///
69/// \param __A
70///    An unsigned 64-bit integer operand.
71/// \returns A 64-bit integer containing the number of bits with value 1 in the
72///    source operand.
73static __inline__ long long __DEFAULT_FN_ATTRS
74_mm_popcnt_u64(unsigned long long __A)
75{
76  return __builtin_popcountll(__A);
77}
78
79/// \brief Counts the number of bits in the source operand having a value of 1.
80///
81/// \headerfile <x86intrin.h>
82///
83/// This intrinsic corresponds to the <c> POPCNT </c> instruction.
84///
85/// \param __A
86///    A signed 64-bit integer operand.
87/// \returns A 64-bit integer containing the number of bits with value 1 in the
88///    source operand.
89static __inline__ long long __DEFAULT_FN_ATTRS
90_popcnt64(long long __A)
91{
92  return __builtin_popcountll(__A);
93}
94#endif /* __x86_64__ */
95
96#undef __DEFAULT_FN_ATTRS
97
98#endif /* _POPCNTINTRIN_H */
99