commit 7cf575c421865b23b898e7a1b9cbcd3f6ecc63da
author John Stiles <johnstiles@google.com> Sat Nov 18 18:26:11 2023 -0500
committer SkCQ <skcq-be@skia-corp.google.com.iam.gserviceaccount.com> Wed Nov 22 13:54:57 2023 +0000
tree 3b9e11d31b603b25f2865fe941da72a48fbf6d2b
parent 111d4246b3570e291ba6894984ef7b79fe07ffbf

Use tailcall recursion to process skcms ops.

This is dramatically faster on M1 processors (and likely other ARMs)
compared to a giant switch. It is also 25% faster on AMD EPYC (hsw).
The MSVS + clang-cl configuration fails tests when SKCMS_MUSTTAIL is
used, so SKCMS_MUSTTAIL is disabled in this configuration; I don't
have access to a Windows machine to check the difference in actual
code generation, but hopefully this is a negligible difference.

Change-Id: Ie2f9569d19f3804fcf3ba77b6148fe8f5c8e13f9
Bug: b/305974160
Reviewed-on: https://skia-review.googlesource.com/c/skcms/+/771479
Commit-Queue: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>