RFR: 8296916: RISC-V: Move some small macro-assembler functions to header file [v2]

[Fei Yang]

> Witnessed that there are some small macro-assembler functions located in file macroAssembler_riscv.cpp.
> These are small functions which mostly contain only a single line of code. We should move them to the
> corresponding header file so that they have a chance to be inlined.
> 
> Testing: Tier1 on linux-riscv64 HiFive unmatched board.

Fei Yang has updated the pull request incrementally with one additional commit since the last revision:

  Review

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Changes:
  - all: https://git.openjdk.org/jdk/pull/11130/files
  - new: https://git.openjdk.org/jdk/pull/11130/files/47365eb2..363966e2

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=11130&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=11130&range=00-01

  Stats: 12 lines in 2 files changed: 6 ins; 6 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/11130.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11130/head:pull/11130

PR: https://git.openjdk.org/jdk/pull/11130