Comment # 26
on bug 10798
from Guy Harris
http://llvm.org/klaus/clang/commit/355130fde923c7284d32cc61fc3a34673bf14852/
says
// FIXME: These builtins are horribly broken; reenable when PR11305 is fixed.
//BUILTIN(__builtin_ia32_pcmpistria128, "iV16cV16cIc","")
...
Bug 11305 is
http://llvm.org/bugs/show_bug.cgi?id=11305
and says
The following intrinsics are supposed to return a certain bit from EFLAGS, but
instead return ECX just like the form of the intrinsics that doesn't specify a
flag bit.
int_x86_sse42_pcmpistria128
int_x86_sse42_pcmpistric128
int_x86_sse42_pcmpistrio128
int_x86_sse42_pcmpistris128
int_x86_sse42_pcmpistriz128
int_x86_sse42_pcmpistrea128
int_x86_sse42_pcmpistrec128
int_x86_sse42_pcmpistreo128
int_x86_sse42_pcmpistres128
int_x86_sse42_pcmpistrez128
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