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 _mm_popcnt_u32(unsigned int __A)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 _mm_popcnt_u64(unsigned long long __A)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