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. 26 static __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. 43 static __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