These were for x86 (32-bit) where the ISA didn't have instructions for these things, but now that we don't support that, and always have SSE2 for x86_64, we never need or use these libcalls anymore.
These were for x86 (32-bit) where the ISA didn't have instructions for these things, but now that we don't support that, and always have SSE2 for x86_64, we never need or use these libcalls anymore.