[Bug target/103571] ABI: V2HF, V4HF and V8HFmode argument passing issues

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103571

--- Comment #4 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Hongyu Wang from comment #3)

> So we may need to support V8HFmode in VALID_SSE2_REG_MODE if we don't want
> to modify those function_args and function_value stuff.

We have V8HFmode moves for TARGET_SSE, So I guress we can enable it for
VALID_SSE2_REG_MODE.