tree 6d582217c2b79aa2d3b7875113f7dd05c2ac6a7f
parent ed88a99c654618c467d6312a411f086cfc328da4
author Yaowu Xu <yaowu.google.com> 1586534295 -0700
committer Yaowu Xu <yaowu.google.com> 1586535381 -0700

Add a new AOMSIGN macro

This commit adds a new macro AOMSIGN, which can be used to get the
sign of an integer. The commit changes to use the macro to replace
"shifting signed 32 bit integer by 31", which is now an undefined
behavior in latest C/C++ standards. The replacement also makes code
easier to understand.

Change-Id: I335135c68fc6583d4e4ab2efa7454a12a782d02b