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
17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
18 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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 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.
40 static __inline__ int __DEFAULT_FN_ATTRS
_mm_popcnt_u32(unsigned int __A)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 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.
56 static __inline__ int __DEFAULT_FN_ATTRS
_popcnt32(int __A)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 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.
73 static __inline__ long long __DEFAULT_FN_ATTRS
_mm_popcnt_u64(unsigned long long __A)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 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.
89 static __inline__ long long __DEFAULT_FN_ATTRS
_popcnt64(long long __A)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