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| author | Gianluca Guida <gianluca@rivosinc.com> | 2023-05-31 17:28:56 +0100 |
|---|---|---|
| committer | Nelson Chu <nelson@rivosinc.com> | 2024-06-18 14:35:50 +0800 |
| commit | 88729e96162f0293177d2324fc8dc6cd78aac793 (patch) | |
| tree | 9bb7bbe7394dbc46add1801b711f30d2a7680c7d /gas/NEWS | |
| parent | 0915235d341841ac7f13bd3136991c19b4a6746b (diff) | |
| download | binutils-88729e96162f0293177d2324fc8dc6cd78aac793.zip binutils-88729e96162f0293177d2324fc8dc6cd78aac793.tar.gz binutils-88729e96162f0293177d2324fc8dc6cd78aac793.tar.bz2 | |
RISC-V: Support Zacas extension.
https://github.com/riscvarchive/riscv-zacas/releases/tag/v1.0
The Zacas extension introduce compare-and-swap instructions to operate
on 32-bit, 64-bit and 128-bit (RV64 only) data values.
It introduces three new instructions:
- amocas.w (32-bit CAS)
- amocas.d (64-bit CAS)
- amocas.q (128-bit CAS, RV64 only)
Like other AMOs in the A extension, Zacas instructions have '.aq',
'.rl' and '.aqrl' variations.
bfd/ChangeLog:
* elfxx-riscv.c (riscv_implicit_subsets): 'A' implied by 'Zacas'.
(riscv_supported_std_z_ext): Add 'Zacas' extension.
(riscv_multi_subset_supports, riscv_multi_subset_supports_ext):
Handle INSN_CLASS_ZACAS case.
gas/ChangeLog:
* NEWS: Updated.
* testsuite/gas/riscv/march-help.l: Updated.
* testsuite/gas/riscv/zacas-32.d: New test (RV32).
* testsuite/gas/riscv/zacas-fail-32.d: Likewise.
* testsuite/gas/riscv/zacas-64.d: New test (RV64).
* testsuite/gas/riscv/zacas-fail-64.d: Likewise.
* testsuite/gas/riscv/zacas.s: New test source.
* testsuite/gas/riscv/zacas-fail.s: Likewise.
* testsuite/gas/riscv/zacas-fail-32.l: New file.
* testsuite/gas/riscv/zacas-fail-64.l: Likewise.
include/ChangeLog:
* include/opcode/riscv.h (INSN_CLASS_ZACAS): New definition.
* include/opcode/riscv-opc.h (MATCH_AMOCAS_W, MASK_AMOCAS_W)
(MATCH_AMOCAS_D, MASK_AMOCAS_D, MATCH_AMOCAS_Q, MASK_AMOCAS_Q):
Likewise.
(amocas_w, amocas_d, amocas_q): Declare instructions.
opcodes/ChangeLog:
* riscv-opc.c (match_rs2_rd_even): New function.
(amocas_w, amocas_d, amocas_q, amocas_w.aq)
(amocas_d.aq, amocas_q.aq, amocas_w.rl, amocas_d.rl, amocas_q.rl)
(amocas_w.aqrl, amocas_d.aqrl, amocas_q.aqrl): Add instructions.
Diffstat (limited to 'gas/NEWS')
| -rw-r--r-- | gas/NEWS | 2 |
1 files changed, 2 insertions, 0 deletions
@@ -19,6 +19,8 @@ * Remove support for RISC-V privileged spec 1.9.1, but linker can still recognize it in case of linking old objects. +* Add support for RISC-V Zacas extension with version 1.0. + * Add support for RISC-V Zcmp extension with version 1.0. * Add support for RISC-V Zfbfmin extension with version 1.0. |