clang  14.0.0git
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 #if defined(__cplusplus) && (__cplusplus >= 201103L)
17 #define __DEFAULT_FN_ATTRS_CONSTEXPR __DEFAULT_FN_ATTRS constexpr
18 #else
19 #define __DEFAULT_FN_ATTRS_CONSTEXPR __DEFAULT_FN_ATTRS
20 #endif
21 
22 /// Counts the number of bits in the source operand having a value of 1.
23 ///
24 /// \headerfile <x86intrin.h>
25 ///
26 /// This intrinsic corresponds to the <c> POPCNT </c> instruction.
27 ///
28 /// \param __A
29 /// An unsigned 32-bit integer operand.
30 /// \returns A 32-bit integer containing the number of bits with value 1 in the
31 /// source operand.
32 static __inline__ int __DEFAULT_FN_ATTRS_CONSTEXPR
33 _mm_popcnt_u32(unsigned int __A)
34 {
35  return __builtin_popcount(__A);
36 }
37 
38 #ifdef __x86_64__
39 /// Counts the number of bits in the source operand having a value of 1.
40 ///
41 /// \headerfile <x86intrin.h>
42 ///
43 /// This intrinsic corresponds to the <c> POPCNT </c> instruction.
44 ///
45 /// \param __A
46 /// An unsigned 64-bit integer operand.
47 /// \returns A 64-bit integer containing the number of bits with value 1 in the
48 /// source operand.
49 static __inline__ long long __DEFAULT_FN_ATTRS_CONSTEXPR
50 _mm_popcnt_u64(unsigned long long __A)
51 {
52  return __builtin_popcountll(__A);
53 }
54 #endif /* __x86_64__ */
55 
56 #undef __DEFAULT_FN_ATTRS
57 #undef __DEFAULT_FN_ATTRS_CONSTEXPR
58 
59 #endif /* __POPCNTINTRIN_H */
_mm_popcnt_u32
static __inline__ int __DEFAULT_FN_ATTRS_CONSTEXPR _mm_popcnt_u32(unsigned int __A)
Counts the number of bits in the source operand having a value of 1.
Definition: popcntintrin.h:33
__DEFAULT_FN_ATTRS_CONSTEXPR
#define __DEFAULT_FN_ATTRS_CONSTEXPR
Definition: popcntintrin.h:19