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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 */ |
60 |
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