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Extension: Zabha #139

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Extension: Zabha #139

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@a4lg a4lg commented Oct 17, 2023

@a4lg a4lg added the enhancement New feature or request label Oct 17, 2023
@a4lg a4lg force-pushed the riscv-zabha branch 2 times, most recently from e62a28d to 5497eb0 Compare October 21, 2023 03:13
@a4lg a4lg force-pushed the riscv-zacas branch 2 times, most recently from 4682912 to d26cfc8 Compare October 21, 2023 03:44
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UNRATIFIED RISC-V: Add support for 'Zabha' subword AMO extension
147a46b 
[DEPENDENCY]
This patch requires my 'Zacas' support patch v2 as in:
<https://sourceware.org/pipermail/binutils/2023-October/130098.html>

[DO NOT MERGE]
Despite that this extension is nearing to be Frozen, the development of
this extension is not yet completed.
Until this extension is frozen/ratified and final version number is
determined, this patch should not be merged upstream. This commit uses
unratified version 0.9 as in the latest release tag:
<https://github.com/riscv/riscv-zabha/releases/tag/v0.9>

This commit adds support for the 'Zabha' extension, adding subword
(byte and half) AMO instructions.

This is based on the latest commit:
<riscv/riscv-zabha@810f0ee>

bfd/ChangeLog:

	* elfxx-riscv.c
	(riscv_implicit_subsets): Make 'Zabha' to imply 'A' extension.
	(riscv_supported_std_z_ext): Add 'Zabha' to the supported list.
	(riscv_multi_subset_supports, riscv_multi_subset_supports_ext):
	Add handling for new instruction classes.

gas/ChangeLog:

	* testsuite/gas/riscv/zabha.s: New test.
	* testsuite/gas/riscv/zabha.d: Likewise.
	* testsuite/gas/riscv/zabha-zacas.s: New test.
	* testsuite/gas/riscv/zabha-zacas.d: Likewise.

include/ChangeLog:

	* opcode/riscv-opc.h (MATCH_AMOADD_B, MASK_AMOADD_B,
	MATCH_AMOADD_H, MASK_AMOADD_H, MATCH_AMOAND_B, MASK_AMOAND_B,
	MATCH_AMOAND_H, MASK_AMOAND_H, MATCH_AMOMAX_B, MASK_AMOMAX_B,
	MATCH_AMOMAX_H, MASK_AMOMAX_H, MATCH_AMOMAXU_B, MASK_AMOMAXU_B,
	MATCH_AMOMAXU_H, MASK_AMOMAXU_H, MATCH_AMOMIN_B, MASK_AMOMIN_B,
	MATCH_AMOMIN_H, MASK_AMOMIN_H, MATCH_AMOMINU_B, MASK_AMOMINU_B,
	MATCH_AMOMINU_H, MASK_AMOMINU_H, MATCH_AMOOR_B, MASK_AMOOR_B,
	MATCH_AMOOR_H, MASK_AMOOR_H, MATCH_AMOSWAP_B, MASK_AMOSWAP_B,
	MATCH_AMOSWAP_H, MASK_AMOSWAP_H, MATCH_AMOXOR_B, MASK_AMOXOR_B,
	MATCH_AMOXOR_H, MASK_AMOXOR_H, MATCH_AMOCAS_B, MASK_AMOCAS_B,
	MATCH_AMOCAS_H, MASK_AMOCAS_H): New.
	* opcode/riscv.h (enum riscv_insn_class): Add new instruction
	classes INSN_CLASS_ZABHA and INSN_CLASS_ZABHA_AND_ZACAS.

opcodes/ChangeLog:

	* riscv-opc.c (riscv_opcodes): Add subword AMO instructions.
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