cmd/internal: Add 6 args to ppc64 optab

This is a preparatory patch to support 6 arg opcodes on POWER10,
and simplify 5 arg opcode processing (e.g RLWNM and similar).

This expands the optab structure, and renames a4 arguments to a6.
No actual change in functionality is made.

Change-Id: I785e4177778e4bf1326cf8e46e8aeaaa0e4d406b
Reviewed-on: https://go-review.googlesource.com/c/go/+/295031
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
Run-TryBot: Carlos Eduardo Seo <carlos.seo@linaro.org>
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Trust: Keith Randall <khr@golang.org>
1 file changed
tree: aa0780bca59c35b5496c2b5cf6086a594445034e
  1. .github/
  2. api/
  3. doc/
  4. lib/
  5. misc/
  6. src/
  7. test/
  8. .gitattributes
  9. .gitignore
  10. AUTHORS
  11. codereview.cfg
  12. CONTRIBUTING.md
  13. CONTRIBUTORS
  14. favicon.ico
  15. LICENSE
  16. PATENTS
  17. README.md
  18. robots.txt
  19. SECURITY.md
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