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author | Philipp Tomsich <philipp.tomsich@vrull.eu> | 2023-04-26 14:09:34 -0600 |
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committer | Jeff Law <jlaw@ventanamicro> | 2023-04-26 14:09:34 -0600 |
commit | 1656d3f8ef56a16745689c03269412988ebcaa54 (patch) | |
tree | b329b8cd37a07f85f718ba3fbf1f2a0e8c2c8893 /bfd | |
parent | dcdec68b0b5371c700bc6152de9c20eb1bdfa287 (diff) | |
download | gdb-1656d3f8ef56a16745689c03269412988ebcaa54.zip gdb-1656d3f8ef56a16745689c03269412988ebcaa54.tar.gz gdb-1656d3f8ef56a16745689c03269412988ebcaa54.tar.bz2 |
RISC-V: Support XVentanaCondOps extension
Ventana Micro has published the specification for their
XVentanaCondOps ("conditional ops") extension at
https://github.com/ventanamicro/ventana-custom-extensions/releases/download/v1.0.0/ventana-custom-extensions-v1.0.0.pdf
which contains two new instructions
- vt.maskc
- vt.maskcn
that can be used in constructing branchless sequences for
various conditional-arithmetic, conditional-logical, and
conditional-select operations.
To support such vendor-defined instructions in the mainline binutils,
this change also adds a riscv_supported_vendor_x_ext secondary
dispatch table (but also keeps the behaviour of allowing any unknow
X-extension to be specified in addition to the known ones from this
table).
As discussed, this change already includes the planned/agreed future
requirements for X-extensions (which are likely to be captured in the
riscv-toolchain-conventions repository):
- a public specification document is available (see above) and is
referenced from the gas-documentation
- the naming follows chapter 27 of the RISC-V ISA specification
- instructions are prefixed by a vendor-prefix (vt for Ventana)
to ensure that they neither conflict with future standard
extensions nor clash with other vendors
bfd/ChangeLog:
* elfxx-riscv.c (riscv_get_default_ext_version): Add riscv_supported_vendor_x_ext.
(riscv_multi_subset_supports): Recognize INSN_CLASS_XVENTANACONDOPS.
gas/ChangeLog:
* doc/c-riscv.texi: Add section to list custom extensions and
their documentation URLs.
* testsuite/gas/riscv/x-ventana-condops.d: New test.
* testsuite/gas/riscv/x-ventana-condops.s: New test.
include/ChangeLog:
* opcode/riscv-opc.h Add vt.maskc and vt.maskcn.
* opcode/riscv.h (enum riscv_insn_class): Add INSN_CLASS_XVENTANACONDOPS.
opcodes/ChangeLog:
* riscv-opc.c: Add vt.maskc and vt.maskcn.
Series-version: 1
Series-to: binutils@sourceware.org
Series-cc: Kito Cheng <kito.cheng@sifive.com>
Series-cc: Nelson Chu <nelson.chu@sifive.com>
Series-cc: Greg Favor <gfavor@ventanamicro.com>
Series-cc: Christoph Muellner <cmuellner@gcc.gnu.org>
Diffstat (limited to 'bfd')
-rw-r--r-- | bfd/elfxx-riscv.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/bfd/elfxx-riscv.c b/bfd/elfxx-riscv.c index 19391d9..bd0c7c8 100644 --- a/bfd/elfxx-riscv.c +++ b/bfd/elfxx-riscv.c @@ -1255,6 +1255,8 @@ 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 }, + /* XVentanaCondOps: https://github.com/ventanamicro/ventana-custom-extensions/releases/download/v1.0.0/ventana-custom-extensions-v1.0.0.pdf */ + {"xventanacondops", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {NULL, 0, 0, 0, 0} }; @@ -2383,6 +2385,8 @@ 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_XVENTANACONDOPS: + return riscv_subset_supports (rps, "xventanacondops"); default: rps->error_handler (_("internal: unreachable INSN_CLASS_*")); |