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| Rev | Author | Line No. | Line |
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| 14 | pmbaty | 1 | /*===---- popcntintrin.h - POPCNT intrinsics -------------------------------=== |
| 2 | * |
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| 3 | * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | * See https://llvm.org/LICENSE.txt for license information. |
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| 5 | * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | * |
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| 7 | *===-----------------------------------------------------------------------=== |
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| 8 | */ |
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| 9 | |||
| 10 | #ifndef __POPCNTINTRIN_H |
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| 11 | #define __POPCNTINTRIN_H |
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| 12 | |||
| 13 | /* Define the default attributes for the functions in this file. */ |
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| 14 | #define __DEFAULT_FN_ATTRS __attribute__((__always_inline__, __nodebug__, __target__("popcnt"))) |
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| 15 | |||
| 16 | #if defined(__cplusplus) && (__cplusplus >= 201103L) |
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| 17 | #define __DEFAULT_FN_ATTRS_CONSTEXPR __DEFAULT_FN_ATTRS constexpr |
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| 18 | #else |
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| 19 | #define __DEFAULT_FN_ATTRS_CONSTEXPR __DEFAULT_FN_ATTRS |
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| 20 | #endif |
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| 21 | |||
| 22 | /// Counts the number of bits in the source operand having a value of 1. |
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| 23 | /// |
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| 24 | /// \headerfile <x86intrin.h> |
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| 25 | /// |
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| 26 | /// This intrinsic corresponds to the <c> POPCNT </c> instruction. |
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| 27 | /// |
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| 28 | /// \param __A |
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| 29 | /// An unsigned 32-bit integer operand. |
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| 30 | /// \returns A 32-bit integer containing the number of bits with value 1 in the |
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| 31 | /// source operand. |
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| 32 | static __inline__ int __DEFAULT_FN_ATTRS_CONSTEXPR |
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| 33 | _mm_popcnt_u32(unsigned int __A) |
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| 34 | { |
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| 35 | return __builtin_popcount(__A); |
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| 36 | } |
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| 37 | |||
| 38 | #ifdef __x86_64__ |
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| 39 | /// Counts the number of bits in the source operand having a value of 1. |
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| 40 | /// |
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| 41 | /// \headerfile <x86intrin.h> |
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| 42 | /// |
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| 43 | /// This intrinsic corresponds to the <c> POPCNT </c> instruction. |
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| 44 | /// |
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| 45 | /// \param __A |
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| 46 | /// An unsigned 64-bit integer operand. |
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| 47 | /// \returns A 64-bit integer containing the number of bits with value 1 in the |
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| 48 | /// source operand. |
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| 49 | static __inline__ long long __DEFAULT_FN_ATTRS_CONSTEXPR |
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| 50 | _mm_popcnt_u64(unsigned long long __A) |
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| 51 | { |
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| 52 | return __builtin_popcountll(__A); |
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| 53 | } |
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| 54 | #endif /* __x86_64__ */ |
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| 55 | |||
| 56 | #undef __DEFAULT_FN_ATTRS |
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| 57 | #undef __DEFAULT_FN_ATTRS_CONSTEXPR |
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| 58 | |||
| 59 | #endif /* __POPCNTINTRIN_H */ |