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Add _lzcnt_u32 and _lzcnt_u64 to lzcntintrin.h to match Intel documentation names for these intrinsics. 

llvm-svn: 221066
This commit is contained in:
Craig Topper 2014-11-01 22:50:57 +00:00
parent a52e0d7cc0
commit e1c664b136
2 changed files with 24 additions and 0 deletions
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12
clang/lib/Headers/lzcntintrin.h
View File

@ -44,12 +44,24 @@ __lzcnt32(unsigned int __X)
return __X ? __builtin_clz(__X) : 32;
}
static __inline__ unsigned int __attribute__((__always_inline__, __nodebug__))
_lzcnt_u32(unsigned int __X)
{
return __X ? __builtin_clz(__X) : 32;
}
#ifdef __x86_64__
static __inline__ unsigned long long __attribute__((__always_inline__, __nodebug__))
__lzcnt64(unsigned long long __X)
{
return __X ? __builtin_clzll(__X) : 64;
}
static __inline__ unsigned long long __attribute__((__always_inline__, __nodebug__))
_lzcnt_u64(unsigned long long __X)
{
return __X ? __builtin_clzll(__X) : 64;
}
#endif
#endif /* __LZCNTINTRIN_H */

12
clang/test/CodeGen/lzcnt-builtins.c
View File

@ -22,3 +22,15 @@ unsigned long long test__lzcnt64(unsigned long long __X)
// CHECK: @llvm.ctlz.i64
return __lzcnt64(__X);
}
unsigned int test_lzcnt_u32(unsigned int __X)
{
// CHECK: @llvm.ctlz.i32
return _lzcnt_u32(__X);
}
unsigned long long test__lzcnt_u64(unsigned long long __X)
{
// CHECK: @llvm.ctlz.i64
return _lzcnt_u64(__X);
}