RFR: 8293781: RISC-V: Clarify types of calls [v2]

[Feilong Jiang]

On Fri, 16 Sep 2022 14:11:12 GMT, Yanhong Zhu <yzhu at openjdk.org> wrote:

>> RISCV64 OpenJDK uses different types of calls in generated calls. It should be clarified what they are. And the PR also cleans up some out-of-date comments.
>
> Yanhong Zhu has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains one commit:
> 
>   Clarify types of calls

Looks good, with one comment:

src/hotspot/cpu/riscv/macroAssembler_riscv.hpp line 655:

> 653:   //     of a direct call, which is used if the destination of a call is in range,
> 654:   //     and a register-indirect call. It has the advantages of reaching anywhere in
> 655:   //     the AArch64 address space and being patchable at runtime when the generated

s/AArch64/RISC-V

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Changes requested by fjiang (Author).

PR: https://git.openjdk.org/jdk/pull/10311