https://bugs.llvm.org/show_bug.cgi?id=35869
Bug ID: 35869
Summary: _mm_setzero_si64 violates the spec by generating xorps
instead of pxor
Product: clang
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: C++
Assignee: unassignedclangb...@nondot.org
Reporter: gonzalob...@gmail.com
CC: dgre...@apple.com, llvm-bugs@lists.llvm.org
In the `<mmintrin.h>` header, the intrinsic `__mm_setzero_si64` [0] implemented
as follows:
static __inline__ __m64 __DEFAULT_FN_ATTRS
_mm_setzero_si64(void)
{
return (__m64){ 0LL };
}
generates `xorps` [1] violating the spec [2] which says that it should generate
the instruction sequence `pxor mm, mm`.
[0]:
https://github.com/llvm-mirror/clang/blob/master/lib/Headers/mmintrin.h#L1296
[1]: https://godbolt.org/g/FnQYkf
[2]:
https://software.intel.com/sites/landingpage/IntrinsicsGuide/#text=_mm_setzero_si64&expand=4727,4727
--
You are receiving this mail because:
You are on the CC list for the bug._______________________________________________
llvm-bugs mailing list
llvm-bugs@lists.llvm.org
http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
