tree 36a9e657bf1eda93427d6ce1827a97db321f17e1
parent ad8f72656b1c9ec4278b00f16bb5701de357df47
author Jan Voung <jvoung@chromium.org> 1405471959 -0700
committer Jan Voung <jvoung@chromium.org> 1405471959 -0700

Lower bitmanip intrinsics, assuming absence of BMI/SSE4.2 for now.

We'll need the fallbacks in any case. However, once we've
decided on how to specify the CPU features of the user
machine we can use the nicer LZCNT/TZCNT/POPCNT as well.

Adds cmov, bsf, and bsr instructions.

Calls a popcount helper function for machines without SSE4.2.

Not handling bswap yet (which can also take i16 params).

BUG= https://code.google.com/p/nativeclient/issues/detail?id=3882
R=stichnot@chromium.org, wala@chromium.org

Review URL: https://codereview.chromium.org/390443005