AArch64: Optimize put_neon function (!1661) · Merge requests · VideoLAN / dav1d

Optimize the put_neon function, details are in the commit messages.

Relative performance of micro benchmarks including all commits (lower is better):

Cortex-A55


w2:   0.991x
w4:   0.992x
w8:   0.999x
w16:  0.875x
w32:  0.775x
w64:  0.914x
w128: 0.998x

Cortex-A510


w2:   0.159x
w4:   0.080x
w8:   0.583x
w16:  0.588x
w32:  0.966x
w64:  1.111x
w128: 0.957x

Cortex-A76


w2:   0.903x
w4:   0.683x
w8:   0.944x
w16:  0.948x
w32:  0.919x
w64:  0.855x
w128: 0.991x

Cortex-A78


w32:  0.867x
w64:  0.820x
w128: 1.011x

Cortex-A715


w32:  0.834x
w64:  0.778x
w128: 1.000x

Cortex-X1


w32:  0.809x
w64:  0.762x
w128: 1.000x

Cortex-X3


w32:  0.733x
w64:  0.720x
w128: 0.999x

AArch64: Optimize put_neon function