RISC-V: Add integer arithmetic instructions for T-Head VECTOR vendor extension

T-Head has a range of vendor-specific instructions. Therefore
it makes sense to group them into smaller chunks in form of
vendor extensions.

This patch adds integer arithmetic instructions for the
"XTheadVector" extension. The 'th' prefix and the
"XTheadVector" extension are documented in a PR for the
RISC-V toolchain conventions ([1]).

[1] https://github.com/riscv-non-isa/riscv-toolchain-conventions/pull/19

Co-developed-by: Lifang Xia <lifang_xia@linux.alibaba.com>
Co-developed-by: Christoph Müllner <christoph.muellner@vrull.eu>

gas/ChangeLog:

	* testsuite/gas/riscv/x-thead-vector.d: Add tests for
	integer arithmetic instructions.
	* testsuite/gas/riscv/x-thead-vector.s: Likewise.

include/ChangeLog:

	* opcode/riscv-opc.h (MATCH_TH_VADCVVM): New.

opcodes/ChangeLog:

	* riscv-opc.c: Likewise.

0 files changed, 0 insertions, 0 deletions