RFR: 8320564: RISC-V: Minimal build failed after JDK-8316592

[Feilong Jiang]

Hi, please review this patch that fix the minimal build failed for riscv.

Error log for minimal build:


ERROR: Build failed for target 'all' in configuration 'linux-riscv64-minimal-fastdebug' (exit code 2)
Stopping javac server

=== Output from failing command(s) repeated here ===
* For target hotspot_variant-minimal_libjvm_objs_macroAssembler_riscv.o:
/home/jiangfeilong/workspace/jdk/src/hotspot/cpu/riscv/macroAssembler_riscv.cpp: In member function 'void MacroAssembler::wide_madd(Register, Register, Register, Register, Register, Register)':
/home/jiangfeilong/workspace/jdk/src/hotspot/cpu/riscv/macroAssembler_riscv.cpp:2064:3: error: 'cad' was not declared in this scope
 2064 | cad(sum_lo, sum_lo, tmp1, tmp1); // Add tmp1 to sum_lo with carry output to tmp1
      | ^~~
/home/jiangfeilong/workspace/jdk/src/hotspot/cpu/riscv/macroAssembler_riscv.cpp:2065:3: error: 'adc' was not declared in this scope; did you mean 'add'?
 2065 | adc(sum_hi, sum_hi, tmp2, tmp1); // Add tmp2 with carry to sum_hi
      | ^~~
      | add

* All command lines available in /home/jiangfeilong/workspace/jdk/build/linux-riscv64-minimal-fastdebug/make-support/failure-logs.
=== End of repeated output ===


The root cause is that `cad` and `adc` are defined under `COMPILER2` macro but new methods `wide_mul` and `wide_madd` are not.

Testing:

- [x] linux-riscv minimal  fastdebug cross-compile

-------------

Commit messages:
 - RISC-V: Minimal build failed after JDK-8316592

Changes: https://git.openjdk.org/jdk/pull/16781/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16781&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8320564
  Stats: 42 lines in 2 files changed: 21 ins; 21 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/16781.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16781/head:pull/16781

PR: https://git.openjdk.org/jdk/pull/16781