Logan Chien | df4f766 | 2019-09-04 16:45:23 -0700 | [diff] [blame] | 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 | |
Sasha Smundak | 4b1f33a | 2021-01-11 15:05:07 -0800 | [diff] [blame] | 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 | |
Logan Chien | df4f766 | 2019-09-04 16:45:23 -0700 | [diff] [blame] | 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. |
Sasha Smundak | 4b1f33a | 2021-01-11 15:05:07 -0800 | [diff] [blame] | 32 | static __inline__ int __DEFAULT_FN_ATTRS_CONSTEXPR |
Logan Chien | df4f766 | 2019-09-04 16:45:23 -0700 | [diff] [blame] | 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. |
Sasha Smundak | 4b1f33a | 2021-01-11 15:05:07 -0800 | [diff] [blame] | 49 | static __inline__ long long __DEFAULT_FN_ATTRS_CONSTEXPR |
Logan Chien | df4f766 | 2019-09-04 16:45:23 -0700 | [diff] [blame] | 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 |
Sasha Smundak | 4b1f33a | 2021-01-11 15:05:07 -0800 | [diff] [blame] | 57 | #undef __DEFAULT_FN_ATTRS_CONSTEXPR |
Logan Chien | df4f766 | 2019-09-04 16:45:23 -0700 | [diff] [blame] | 58 | |
| 59 | #endif /* __POPCNTINTRIN_H */ |