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popcntintrin.h
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/*===---- popcntintrin.h - POPCNT intrinsics -------------------------------=== * * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. * See https://llvm.org/LICENSE.txt for license information. * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception * *===-----------------------------------------------------------------------=== */ #ifndef __POPCNTINTRIN_H #define __POPCNTINTRIN_H /* Define the default attributes for the functions in this file. */ #if defined(__cplusplus) && (__cplusplus >= 201103L) #define __DEFAULT_FN_ATTRS \ __attribute__((__always_inline__, __nodebug__, \ __target__("popcnt"))) constexpr #else #define __DEFAULT_FN_ATTRS \ __attribute__((__always_inline__, __nodebug__, __target__("popcnt"))) #endif /// Counts the number of bits in the source operand having a value of 1. /// /// \headerfile <x86intrin.h> /// /// This intrinsic corresponds to the <c> POPCNT </c> instruction. /// /// \param __A /// An unsigned 32-bit integer operand. /// \returns A 32-bit integer containing the number of bits with value 1 in the /// source operand. static __inline__ int __DEFAULT_FN_ATTRS _mm_popcnt_u32(unsigned int __A) { return __builtin_popcount(__A); } #ifdef __x86_64__ /// Counts the number of bits in the source operand having a value of 1. /// /// \headerfile <x86intrin.h> /// /// This intrinsic corresponds to the <c> POPCNT </c> instruction. /// /// \param __A /// An unsigned 64-bit integer operand. /// \returns A 64-bit integer containing the number of bits with value 1 in the /// source operand. static __inline__ long long __DEFAULT_FN_ATTRS _mm_popcnt_u64(unsigned long long __A) { return __builtin_popcountll(__A); } #endif /* __x86_64__ */ #undef __DEFAULT_FN_ATTRS #endif /* __POPCNTINTRIN_H */