Add SSSE3 implementation for ipred_cfl_ac_420 and ipred_cfl_ac_422

cfl_ac_420_w4_8bpc_c: 1621.0
cfl_ac_420_w4_8bpc_ssse3: 92.5
cfl_ac_420_w8_8bpc_c: 3344.1
cfl_ac_420_w8_8bpc_ssse3: 115.4
cfl_ac_420_w16_8bpc_c: 6024.9
cfl_ac_420_w16_8bpc_ssse3: 187.8
cfl_ac_422_w4_8bpc_c: 1762.5
cfl_ac_422_w4_8bpc_ssse3: 81.4
cfl_ac_422_w8_8bpc_c: 4941.2
cfl_ac_422_w8_8bpc_ssse3: 166.5
cfl_ac_422_w16_8bpc_c: 8261.8
cfl_ac_422_w16_8bpc_ssse3: 272.3
21 jobs for master in 6 minutes and 56 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Style
passed #265318
debian amd64
style-check

00:00:24

 
  Build
passed #265319
debian amd64
build-debian

00:00:41

passed #265327
debian aarch64
build-debian-aarch64

00:01:30

passed #265328
debian aarch64
build-debian-aarch64-clang-5

00:01:03

passed #265331
debian armv7
build-debian-armv7

00:02:58

passed #265332
debian armv7
build-debian-armv7-clang-5

00:01:12

passed #265320
debian amd64
build-debian-static

00:00:40

passed #265330
debian aarch64
build-debian-werror

00:00:34

passed #265321
debian amd64
build-debian32

00:00:32

passed #265329
macos
build-macos

00:00:32

passed #265333
debian amd64 allowed to fail
build-ubuntu-snap

00:01:11

passed #265325
debian amd64
build-win-arm32

00:00:32

passed #265326
debian amd64
build-win-arm64

00:00:33

passed #265322
debian amd64
build-win32

00:00:45

passed #265323
debian amd64
build-win32-unaligned-stack

00:00:40

passed #265324
debian amd64
build-win64

00:00:44

 
  Test
passed #265334
debian amd64
test-debian

00:00:49

passed #265335
debian amd64
test-debian-asan

00:02:18

passed #265336
debian amd64
test-debian-msan

00:01:14

passed #265337
debian amd64
test-debian-ubsan

00:01:33

passed #265338
debian amd64
test-win64

00:00:47