runtime: provide and use a GO_PPC64X_HAS_FUNCDESC define

Rather than implying that all ppc64 GOARCHs use function descriptors,
provide a define for platforms that make use of function descriptors.
Condition on GO_PPC64X_HAS_FUNCDESC when choosing whether or not
to load the entry address from the first slot of the function

Updates #56001.

Change-Id: I9cdc788f2de70a1262c17d8485b555383d1374b5
Reviewed-by: Dmitri Shuralyov <>
Run-TryBot: Joel Sing <>
Reviewed-by: Lynn Boger <>
TryBot-Result: Gopher Robot <>
Reviewed-by: Cherry Mui <>
3 files changed
tree: f53e2c6c72a84ab0eaf4ab5aaee07bd2a17a86fd
  1. .github/
  2. api/
  3. doc/
  4. lib/
  5. misc/
  6. src/
  7. test/
  8. .gitattributes
  9. .gitignore
  10. codereview.cfg
  12. go.env

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