tree fca0db0effa07c70ea7f0b64f84b7f6e954c1944
parent 8c523e0f3ffa66eefd70f893e9f863b7d9ea3dc9
author mtklein <mtklein@chromium.org> 1469545279 -0700
committer Commit bot <commit-bot@chromium.org> 1469545280 -0700

Add Sk4h_load4 for loading F16.

Should feel very similar to Sk4h_store4:
NEON uses its native instruction, SSE unpacks manually.

Since we'll have our F16s in 4 Sk4h by the time we're done here,
this also extracts an Sk4h->Sk4f routine from the old uint64_t->Sk4f one.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2184753002
CQ_INCLUDE_TRYBOTS=master.client.skia:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD-Trybot

Review-Url: https://codereview.chromium.org/2184753002