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