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popcntintrin.h
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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 #define __DEFAULT_FN_ATTRS __attribute__((__always_inline__, __nodebug__, __target__("popcnt")))
15 
16 /// Counts the number of bits in the source operand having a value of 1.
17 ///
18 /// \headerfile <x86intrin.h>
19 ///
20 /// This intrinsic corresponds to the <c> POPCNT </c> instruction.
21 ///
22 /// \param __A
23 /// An unsigned 32-bit integer operand.
24 /// \returns A 32-bit integer containing the number of bits with value 1 in the
25 /// source operand.
26 static __inline__ int __DEFAULT_FN_ATTRS
27 _mm_popcnt_u32(unsigned int __A)
28 {
29  return __builtin_popcount(__A);
30 }
31 
32 #ifdef __x86_64__
33 /// Counts the number of bits in the source operand having a value of 1.
34 ///
35 /// \headerfile <x86intrin.h>
36 ///
37 /// This intrinsic corresponds to the <c> POPCNT </c> instruction.
38 ///
39 /// \param __A
40 /// An unsigned 64-bit integer operand.
41 /// \returns A 64-bit integer containing the number of bits with value 1 in the
42 /// source operand.
43 static __inline__ long long __DEFAULT_FN_ATTRS
44 _mm_popcnt_u64(unsigned long long __A)
45 {
46  return __builtin_popcountll(__A);
47 }
48 #endif /* __x86_64__ */
49 
50 #undef __DEFAULT_FN_ATTRS
51 
52 #endif /* __POPCNTINTRIN_H */
__inline void __m128d __A
Definition: emmintrin.h:169
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:27
#define __DEFAULT_FN_ATTRS
Definition: popcntintrin.h:14