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popcntintrin.h
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1 /*===---- popcntintrin.h - POPCNT intrinsics -------------------------------===
2  *
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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.
40 static __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.
56 static __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.
73 static __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.
89 static __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 */
static __inline__ int __DEFAULT_FN_ATTRS _popcnt32(int __A)
Counts the number of bits in the source operand having a value of 1.
Definition: popcntintrin.h:57
static __inline__ int __DEFAULT_FN_ATTRS _mm_popcnt_u32(unsigned int __A)
Counts the number of bits in the source operand having a value of 1.
Definition: popcntintrin.h:41
#define __DEFAULT_FN_ATTRS
Definition: popcntintrin.h:28