git: openjdk/jdk: 8308915: RISC-V: Improve temporary vector register usage avoiding the use of v0

[Fei Yang]

Changeset: e21f865d
Author:    Dingli Zhang <dzhang at openjdk.org>
Committer: Fei Yang <fyang at openjdk.org>
Date:      2023-05-29 01:03:01 +0000
URL:       https://git.openjdk.org/jdk/commit/e21f865d84c7c861843ff568019e1ad11d280a50

8308915: RISC-V: Improve temporary vector register usage avoiding the use of v0

Reviewed-by: yzhu, fyang

! src/hotspot/cpu/riscv/c2_MacroAssembler_riscv.cpp
! src/hotspot/cpu/riscv/riscv.ad
! src/hotspot/cpu/riscv/riscv_v.ad