tree 0525e34cecae843ba3712e2ad1455b0e4517cec3
parent 0c2ab6fb8551577564985271586ce7ef77a42081
author Jerome Jiang <jianj@google.com> 1592005665 -0700
committer Jerome Jiang <jianj@google.com> 1592947922 +0000

Add special C func to do 2 to 1 scale

used by svc
optimizations neon/ssse3 following

Change-Id: I0afef5553b840ead10124910650ce1fa7382c19d