RFR: 8293524: RISC-V: Use macro-assembler functions as appropriate

[Aleksey Shipilev]

On Thu, 8 Sep 2022 03:20:41 GMT, Fei Yang <fyang at openjdk.org> wrote:

> Use of assember functions on riscv can be improved. For example, we use 'fence(0xf, 0xf)' in function TemplateInterpreterGenerator::generate_safept_entry_for to emit a full memory fence instruction. Here we should use 'membar(MacroAssembler::AnyAny)' instead, which would make the code more readable. This also replace some calls to 'li' with 'mv' so that it will be more consistent when moving integer constant.
> 
> Testing: Tier1 tested on Linux-riscv64 SiFive Unmatched board.

Marked as reviewed by shade (Reviewer).

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PR: https://git.openjdk.org/jdk/pull/10210