From 86fbfedd715df8a89d73374d70b1f068f95b450e Mon Sep 17 00:00:00 2001 From: Jin Ma Date: Sat, 18 Nov 2023 14:53:08 +0800 Subject: RISC-V: Add T-Head VECTOR vendor extension. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit T-Head has a range of vendor-specific instructions ([2]). Therefore it makes sense to group them into smaller chunks in form of vendor extensions. This patch adds the "XTheadVector" extension, a collection of T-Head-specific vector instructions. The 'th' prefix and the "XTheadVector" extension are documented in a PR for the RISC-V toolchain conventions ([1]). Here are some things that need to be explained: The "XTheadVector" extension is not a custom-extension, but a non-standard non-conforming extension. The encoding space of the "TheadVector" instructions overlaps with those of the 'V' extension. This encoding space conflict is not on purpose, but the result of issues in the past that have been resolved since. Therefore, the "XTheadVector" extension and the 'V' extension are in conflict. [1] https://github.com/riscv-non-isa/riscv-toolchain-conventions/pull/19 [2] https://github.com/T-head-Semi/thead-extension-spec/releases/download/2.3.0/xthead-2023-11-10-2.3.0.pdf Co-developed-by: Lifang Xia Co-developed-by: Christoph Müllner bfd/ChangeLog: * elfxx-riscv.c (riscv_parse_check_conflicts): The "XTheadVector" extension and the 'V' extension are in conflict. (riscv_multi_subset_supports): Likewise.. (riscv_multi_subset_supports_ext): Likewise. gas/ChangeLog: * doc/c-riscv.texi: * testsuite/gas/riscv/x-thead-vector-fail.d: New test. * testsuite/gas/riscv/x-thead-vector-fail.l: New test. * testsuite/gas/riscv/x-thead-vector.s: New test. include/ChangeLog: * opcode/riscv.h (enum riscv_insn_class): --- bfd/elfxx-riscv.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'bfd/elfxx-riscv.c') diff --git a/bfd/elfxx-riscv.c b/bfd/elfxx-riscv.c index c9acf12..e2c3ffe 100644 --- a/bfd/elfxx-riscv.c +++ b/bfd/elfxx-riscv.c @@ -1373,6 +1373,7 @@ static struct riscv_supported_ext riscv_supported_vendor_x_ext[] = {"xtheadmemidx", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"xtheadmempair", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"xtheadsync", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, + {"xtheadvector", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"xventanacondops", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {NULL, 0, 0, 0, 0} }; @@ -1984,6 +1985,13 @@ riscv_parse_check_conflicts (riscv_parse_subset_t *rps) (_("`zfinx' is conflict with the `f/d/q/zfh/zfhmin' extension")); no_conflict = false; } + if (riscv_lookup_subset (rps->subset_list, "xtheadvector", &subset) + && riscv_lookup_subset (rps->subset_list, "v", &subset)) + { + rps->error_handler + (_("`xtheadvector' is conflict with the `v' extension")); + no_conflict = false; + } bool support_zve = false; bool support_zvl = false; @@ -2580,6 +2588,8 @@ riscv_multi_subset_supports (riscv_parse_subset_t *rps, return riscv_subset_supports (rps, "xtheadmempair"); case INSN_CLASS_XTHEADSYNC: return riscv_subset_supports (rps, "xtheadsync"); + case INSN_CLASS_XTHEADVECTOR: + return riscv_subset_supports (rps, "xtheadvector"); case INSN_CLASS_XVENTANACONDOPS: return riscv_subset_supports (rps, "xventanacondops"); default: @@ -2824,6 +2834,8 @@ riscv_multi_subset_supports_ext (riscv_parse_subset_t *rps, return "xtheadmempair"; case INSN_CLASS_XTHEADSYNC: return "xtheadsync"; + case INSN_CLASS_XTHEADVECTOR: + return "xtheadvector"; default: rps->error_handler (_("internal: unreachable INSN_CLASS_*")); -- cgit v1.1