x86: add AVX2 SIMD for ipred.cfl_ac[444]

cfl_ac_444_w4_8bpc_c: 499.1
cfl_ac_444_w4_8bpc_ssse3: 24.3
cfl_ac_444_w4_8bpc_avx2: 28.9
cfl_ac_444_w8_8bpc_c: 1240.2
cfl_ac_444_w8_8bpc_ssse3: 47.4
cfl_ac_444_w8_8bpc_avx2: 34.9
cfl_ac_444_w16_8bpc_c: 1785.7
cfl_ac_444_w16_8bpc_ssse3: 86.7
cfl_ac_444_w16_8bpc_avx2: 54.6
cfl_ac_444_w32_8bpc_c: 4343.5
cfl_ac_444_w32_8bpc_ssse3: 236.5
cfl_ac_444_w32_8bpc_avx2: 113.6

mentioned in issue #78

resolved all threads

added 1 commit

• 4e9b3272 - x86: add AVX2 SIMD for ipred.cfl_ac[444]

Compare with previous version

resolved all threads

resolved all threads

added 13 commits

• 4e9b3272...6b85daf0 - 11 commits from branch videolan:master
• a02ed9c6 - checkasm: add proper restrictions for h/w_pad in ipred.cfl_ac[444/422]
• 7f2833a9 - x86: add AVX2 SIMD for ipred.cfl_ac[444]

Compare with previous version

enabled an automatic merge when the pipeline for 7f2833a9 succeeds

merged

added performance label

changed milestone to %0.7.0

added x86 label