1f51a89d39
These were ignored by git accidentally. We want ALL OF THEM since they all came in the llvm/clang source distribution.
56 lines
2.0 KiB
C
56 lines
2.0 KiB
C
/*===---- lzcntintrin.h - LZCNT intrinsics ---------------------------------===
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*
|
|
*===-----------------------------------------------------------------------===
|
|
*/
|
|
|
|
#if !defined __X86INTRIN_H && !defined __IMMINTRIN_H
|
|
#error "Never use <lzcntintrin.h> directly; include <x86intrin.h> instead."
|
|
#endif
|
|
|
|
#ifndef __LZCNT__
|
|
# error "LZCNT instruction is not enabled"
|
|
#endif /* __LZCNT__ */
|
|
|
|
#ifndef __LZCNTINTRIN_H
|
|
#define __LZCNTINTRIN_H
|
|
|
|
static __inline__ unsigned short __attribute__((__always_inline__, __nodebug__))
|
|
__lzcnt16(unsigned short __X)
|
|
{
|
|
return __builtin_clzs(__X);
|
|
}
|
|
|
|
static __inline__ unsigned int __attribute__((__always_inline__, __nodebug__))
|
|
__lzcnt32(unsigned int __X)
|
|
{
|
|
return __builtin_clz(__X);
|
|
}
|
|
|
|
#ifdef __x86_64__
|
|
static __inline__ unsigned long long __attribute__((__always_inline__, __nodebug__))
|
|
__lzcnt64(unsigned long long __X)
|
|
{
|
|
return __builtin_clzll(__X);
|
|
}
|
|
#endif
|
|
|
|
#endif /* __LZCNTINTRIN_H */
|