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. 32static __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. 49static __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