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/*===---- lzcntintrin.h - LZCNT 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
*
*===-----------------------------------------------------------------------===
*/
#if !defined __X86INTRIN_H && !defined __IMMINTRIN_H
#error "Never use <lzcntintrin.h> directly; include <x86intrin.h> instead."
#endif
#ifndef __LZCNTINTRIN_H
#define __LZCNTINTRIN_H
/* Define the default attributes for the functions in this file. */
#define __DEFAULT_FN_ATTRS __attribute__((__always_inline__, __nodebug__, __target__("lzcnt")))
#ifndef _MSC_VER
/// Counts the number of leading zero bits in the operand.
///
/// \headerfile <x86intrin.h>
///
/// This intrinsic corresponds to the \c LZCNT instruction.
///
/// \param __X
/// An unsigned 16-bit integer whose leading zeros are to be counted.
/// \returns An unsigned 16-bit integer containing the number of leading zero
/// bits in the operand.
#define __lzcnt16(X) __builtin_ia32_lzcnt_u16((unsigned short)(X))
#endif // _MSC_VER
/// Counts the number of leading zero bits in the operand.
///
/// \headerfile <x86intrin.h>
///
/// This intrinsic corresponds to the \c LZCNT instruction.
///
/// \param __X
/// An unsigned 32-bit integer whose leading zeros are to be counted.
/// \returns An unsigned 32-bit integer containing the number of leading zero
/// bits in the operand.
/// \see _lzcnt_u32
static __inline__ unsigned int __DEFAULT_FN_ATTRS
__lzcnt32(unsigned int __X)
{
return __builtin_ia32_lzcnt_u32(__X);
}
/// Counts the number of leading zero bits in the operand.
///
/// \headerfile <x86intrin.h>
///
/// This intrinsic corresponds to the \c LZCNT instruction.
///
/// \param __X
/// An unsigned 32-bit integer whose leading zeros are to be counted.
/// \returns An unsigned 32-bit integer containing the number of leading zero
/// bits in the operand.
/// \see __lzcnt32
static __inline__ unsigned int __DEFAULT_FN_ATTRS
_lzcnt_u32(unsigned int __X)
{
return __builtin_ia32_lzcnt_u32(__X);
}
#ifdef __x86_64__
#ifndef _MSC_VER
/// Counts the number of leading zero bits in the operand.
///
/// \headerfile <x86intrin.h>
///
/// This intrinsic corresponds to the \c LZCNT instruction.
///
/// \param __X
/// An unsigned 64-bit integer whose leading zeros are to be counted.
/// \returns An unsigned 64-bit integer containing the number of leading zero
/// bits in the operand.
/// \see _lzcnt_u64
#define __lzcnt64(X) __builtin_ia32_lzcnt_u64((unsigned long long)(X))
#endif // _MSC_VER
/// Counts the number of leading zero bits in the operand.
///
/// \headerfile <x86intrin.h>
///
/// This intrinsic corresponds to the \c LZCNT instruction.
///
/// \param __X
/// An unsigned 64-bit integer whose leading zeros are to be counted.
/// \returns An unsigned 64-bit integer containing the number of leading zero
/// bits in the operand.
/// \see __lzcnt64
static __inline__ unsigned long long __DEFAULT_FN_ATTRS
_lzcnt_u64(unsigned long long __X)
{
return __builtin_ia32_lzcnt_u64(__X);
}
#endif
#undef __DEFAULT_FN_ATTRS
#endif /* __LZCNTINTRIN_H */
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