popcntintrin.h revision 1.1.1.1
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/// Counts the number of bits in the source operand having a value of 1. 17/// 18/// \headerfile <x86intrin.h> 19/// 20/// This intrinsic corresponds to the <c> POPCNT </c> instruction. 21/// 22/// \param __A 23/// An unsigned 32-bit integer operand. 24/// \returns A 32-bit integer containing the number of bits with value 1 in the 25/// source operand. 26static __inline__ int __DEFAULT_FN_ATTRS 27_mm_popcnt_u32(unsigned int __A) 28{ 29 return __builtin_popcount(__A); 30} 31 32#ifdef __x86_64__ 33/// Counts the number of bits in the source operand having a value of 1. 34/// 35/// \headerfile <x86intrin.h> 36/// 37/// This intrinsic corresponds to the <c> POPCNT </c> instruction. 38/// 39/// \param __A 40/// An unsigned 64-bit integer operand. 41/// \returns A 64-bit integer containing the number of bits with value 1 in the 42/// source operand. 43static __inline__ long long __DEFAULT_FN_ATTRS 44_mm_popcnt_u64(unsigned long long __A) 45{ 46 return __builtin_popcountll(__A); 47} 48#endif /* __x86_64__ */ 49 50#undef __DEFAULT_FN_ATTRS 51 52#endif /* __POPCNTINTRIN_H */ 53