1 /*===---- popcntintrin.h - POPCNT intrinsics -------------------------------===
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21 *===-----------------------------------------------------------------------===
24 #ifndef _POPCNTINTRIN_H
25 #define _POPCNTINTRIN_H
27 /* Define the default attributes for the functions in this file. */
28 #define __DEFAULT_FN_ATTRS __attribute__((__always_inline__, __nodebug__, __target__("popcnt")))
30 /// \brief Counts the number of bits in the source operand having a value of 1.
32 /// \headerfile <x86intrin.h>
34 /// This intrinsic corresponds to the <c> POPCNT </c> instruction.
37 /// An unsigned 32-bit integer operand.
38 /// \returns A 32-bit integer containing the number of bits with value 1 in the
40 static __inline__ int __DEFAULT_FN_ATTRS
41 _mm_popcnt_u32(unsigned int __A)
43 return __builtin_popcount(__A);
46 /// \brief Counts the number of bits in the source operand having a value of 1.
48 /// \headerfile <x86intrin.h>
50 /// This intrinsic corresponds to the <c> POPCNT </c> instruction.
53 /// A signed 32-bit integer operand.
54 /// \returns A 32-bit integer containing the number of bits with value 1 in the
56 static __inline__ int __DEFAULT_FN_ATTRS
59 return __builtin_popcount(__A);
63 /// \brief Counts the number of bits in the source operand having a value of 1.
65 /// \headerfile <x86intrin.h>
67 /// This intrinsic corresponds to the <c> POPCNT </c> instruction.
70 /// An unsigned 64-bit integer operand.
71 /// \returns A 64-bit integer containing the number of bits with value 1 in the
73 static __inline__ long long __DEFAULT_FN_ATTRS
74 _mm_popcnt_u64(unsigned long long __A)
76 return __builtin_popcountll(__A);
79 /// \brief Counts the number of bits in the source operand having a value of 1.
81 /// \headerfile <x86intrin.h>
83 /// This intrinsic corresponds to the <c> POPCNT </c> instruction.
86 /// A signed 64-bit integer operand.
87 /// \returns A 64-bit integer containing the number of bits with value 1 in the
89 static __inline__ long long __DEFAULT_FN_ATTRS
90 _popcnt64(long long __A)
92 return __builtin_popcountll(__A);
94 #endif /* __x86_64__ */
96 #undef __DEFAULT_FN_ATTRS
98 #endif /* _POPCNTINTRIN_H */