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| author | Philipp Tomsich <philipp.tomsich@vrull.eu> | 2023-06-27 07:22:49 -0600 |
|---|---|---|
| committer | Jeff Law <jlaw@ventanamicro> | 2023-06-27 07:24:43 -0600 |
| commit | b625eff8a2346fe1107aa4ab7bbf4302f2c2136e (patch) | |
| tree | 9e11fce586187e074473ba6d38ea3e2be64c8697 /bfd/elfxx-riscv.c | |
| parent | 15d842846d1fd79e141b1eddc9f648a8200223da (diff) | |
| download | gdb-b625eff8a2346fe1107aa4ab7bbf4302f2c2136e.zip gdb-b625eff8a2346fe1107aa4ab7bbf4302f2c2136e.tar.gz gdb-b625eff8a2346fe1107aa4ab7bbf4302f2c2136e.tar.bz2 | |
RISC-V: Support Zicond extension
This implements the Zicond (conditional integer operations) extension,
as of version 1.0-rc2.
The Zicond extension acts as a building block for branchless sequences
including conditional-arithmetic, conditional-logic and
conditional-select/move.
The following instructions constitute Zicond:
- czero.eqz rd, rs1, rs2 => rd = (rs2 == 0) ? 0 : rs1
- czero.nez rd, rs1, rs2 => rd = (rs2 != 0) ? 0 : rs1
See
https://github.com/riscv/riscv-zicond/releases/download/v1.0-rc2/riscv-zicond-v1.0-rc2.pdf
for the proposed specification and usage details.
bfd/ChangeLog:
* elfxx-riscv.c (riscv_multi_subset_supports): Recognize
INSN_CLASS_ZICOND.
(riscv_multi_subset_supports_ext): Recognize INSN_CLASS_ZICOND.
gas/ChangeLog:
* testsuite/gas/riscv/zicond.d: New test.
* testsuite/gas/riscv/zicond.s: New test.
include/ChangeLog:
* opcode/riscv-opc.h (MATCH_CZERO_EQZ): Define.
(MASK_CZERO_EQZ): Define.
(MATCH_CZERO_NEZ): Define,
(MASK_CZERO_NEZ): Define.
(DECLARE_INSN): Add czero.eqz and czero.nez.
* opcode/riscv.h (enum riscv_insn_class): Add
INSN_CLASS_ZICOND.
opcodes/ChangeLog:
* riscv-opc.c: Add czero.eqz and czero.nez.
Signed-off-by: Philipp Tomsich <philipp.tomsich@vrull.eu>
Diffstat (limited to 'bfd/elfxx-riscv.c')
| -rw-r--r-- | bfd/elfxx-riscv.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/bfd/elfxx-riscv.c b/bfd/elfxx-riscv.c index 7f45324..1407c55 100644 --- a/bfd/elfxx-riscv.c +++ b/bfd/elfxx-riscv.c @@ -1222,6 +1222,7 @@ static struct riscv_supported_ext riscv_supported_std_z_ext[] = {"zicbom", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"zicbop", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"zicboz", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, + {"zicond", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 }, {"zicsr", ISA_SPEC_CLASS_20191213, 2, 0, 0 }, {"zicsr", ISA_SPEC_CLASS_20190608, 2, 0, 0 }, {"zifencei", ISA_SPEC_CLASS_20191213, 2, 0, 0 }, @@ -2314,6 +2315,8 @@ riscv_multi_subset_supports (riscv_parse_subset_t *rps, return riscv_subset_supports (rps, "zicbop"); case INSN_CLASS_ZICBOZ: return riscv_subset_supports (rps, "zicboz"); + case INSN_CLASS_ZICOND: + return riscv_subset_supports (rps, "zicond"); case INSN_CLASS_ZICSR: return riscv_subset_supports (rps, "zicsr"); case INSN_CLASS_ZIFENCEI: @@ -2465,6 +2468,8 @@ riscv_multi_subset_supports_ext (riscv_parse_subset_t *rps, return "zicbop"; case INSN_CLASS_ZICBOZ: return "zicboz"; + case INSN_CLASS_ZICOND: + return "zicond"; case INSN_CLASS_ZICSR: return "zicsr"; case INSN_CLASS_ZIFENCEI: |