tree 59649be92fc80a0d471cceb74c5f24cc32c6e68d
parent 0193c3d992bf7b27e2116e504a10f0425d78465c
author George Burgess IV <gbiv@google.com> 1726679055 -0600
committer George Burgess IV <gbiv@google.com> 1727111483 -0600

libc: replace generic memcmp with atom impl

This 'atom' impl is optimized with sse2, whereas the baseline is very
conservative. Since we use SSE-optimized builtins for ... everything
else, do that here, too.

To be clear, the atom impl for this is ssse3, which is required for x86
by the ABI.

Bug: 358360849
Test: mma
Change-Id: I3ba1e89987b75249ca5dc996e0450cff9cdfc8cb