RISC-V: Support Zabha extension.

The Zabha extension[1] supports for byte and halfword
atomic memory operations. This patch add all instructions
include in Zabha. Further work is waiting Zacas[2] merge.

[1] https://github.com/riscv/riscv-zabha/tags
[2] https://sourceware.org/pipermail/binutils/2023-May/127700.html

Version log:
Add new imply relation that Zabha extension implies A extension.

bfd/ChangeLog:

        * elfxx-riscv.c (riscv_implicit_subsets): New imply.
        (riscv_multi_subset_supports): New extension.
        (riscv_multi_subset_supports_ext): Ditto.

gas/ChangeLog:

        * testsuite/gas/riscv/zabha-32.d: New test.
        * testsuite/gas/riscv/zabha.d: New test.
        * testsuite/gas/riscv/zabha.s: New test.

include/ChangeLog:

        * opcode/riscv-opc.h (MATCH_AMOADD_B): New opcodes.
        (MASK_AMOADD_B): Ditto.
        (MATCH_AMOXOR_B): Ditto.
        (MASK_AMOXOR_B): Ditto.
        (MATCH_AMOOR_B): Ditto.
        (MASK_AMOOR_B): Ditto.
        (MATCH_AMOAND_B): Ditto.
        (MASK_AMOAND_B): Ditto.
        (MATCH_AMOMIN_B): Ditto.
        (MASK_AMOMIN_B): Ditto.
        (MATCH_AMOMAX_B): Ditto.
        (MASK_AMOMAX_B): Ditto.
        (MATCH_AMOMINU_B): Ditto.
        (MASK_AMOMINU_B): Ditto.
        (MATCH_AMOMAXU_B): Ditto.
        (MASK_AMOMAXU_B): Ditto.
        (MATCH_AMOSWAP_B): Ditto.
        (MASK_AMOSWAP_B): Ditto.
        (MATCH_AMOADD_H): Ditto.
        (MASK_AMOADD_H): Ditto.
        (MATCH_AMOXOR_H): Ditto.
        (MASK_AMOXOR_H): Ditto.
        (MATCH_AMOOR_H): Ditto.
        (MASK_AMOOR_H): Ditto.
        (MATCH_AMOAND_H): Ditto.
        (MASK_AMOAND_H): Ditto.
        (MATCH_AMOMIN_H): Ditto.
        (MASK_AMOMIN_H): Ditto.
        (MATCH_AMOMAX_H): Ditto.
        (MASK_AMOMAX_H): Ditto.
        (MATCH_AMOMINU_H): Ditto.
        (MASK_AMOMINU_H): Ditto.
        (MATCH_AMOMAXU_H): Ditto.
        (MASK_AMOMAXU_H): Ditto.
        (MATCH_AMOSWAP_H): Ditto.
        (MASK_AMOSWAP_H): Ditto.
        (DECLARE_INSN): New declare.
        * opcode/riscv.h (enum riscv_insn_class): New class.

opcodes/ChangeLog:

        * riscv-opc.c: New instructions.

1 files changed, 74 insertions, 0 deletions

diff --git a/opcodes/riscv-opc.c b/opcodes/riscv-opc.c
index dcc592e..daa888d 100644
--- a/opcodes/riscv-opc.c
+++ b/opcodes/riscv-opc.c
@@ -660,6 +660,80 @@ const struct riscv_opcode riscv_opcodes[] =
 {"amomin.d.aqrl",  64, INSN_CLASS_A, "d,t,0(s)", MATCH_AMOMIN_D|MASK_AQRL, MASK_AMOMIN_D|MASK_AQRL, match_opcode, INSN_DREF|INSN_8_BYTE },
 {"amominu.d.aqrl", 64, INSN_CLASS_A, "d,t,0(s)", MATCH_AMOMINU_D|MASK_AQRL, MASK_AMOMINU_D|MASK_AQRL, match_opcode, INSN_DREF|INSN_8_BYTE },
 
+/* Byte and Halfword Atomic Memory Operations instruction subset.  */
+{"amoadd.b",        0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOADD_B, MASK_AMOADD_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoswap.b",       0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOSWAP_B, MASK_AMOSWAP_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoand.b",        0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOAND_B, MASK_AMOAND_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoor.b",         0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOOR_B, MASK_AMOOR_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoxor.b",        0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOXOR_B, MASK_AMOXOR_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amomax.b",        0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAX_B, MASK_AMOMAX_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amomaxu.b",       0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAXU_B, MASK_AMOMAXU_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amomin.b",        0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMIN_B, MASK_AMOMIN_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amominu.b",       0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMINU_B, MASK_AMOMINU_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoadd.b.aq",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOADD_B|MASK_AQ, MASK_AMOADD_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoswap.b.aq",    0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOSWAP_B|MASK_AQ, MASK_AMOSWAP_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoand.b.aq",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOAND_B|MASK_AQ, MASK_AMOAND_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoor.b.aq",      0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOOR_B|MASK_AQ, MASK_AMOOR_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoxor.b.aq",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOXOR_B|MASK_AQ, MASK_AMOXOR_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amomax.b.aq",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAX_B|MASK_AQ, MASK_AMOMAX_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amomaxu.b.aq",    0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAXU_B|MASK_AQ, MASK_AMOMAXU_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amomin.b.aq",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMIN_B|MASK_AQ, MASK_AMOMIN_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amominu.b.aq",    0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMINU_B|MASK_AQ, MASK_AMOMINU_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoadd.b.rl",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOADD_B|MASK_RL, MASK_AMOADD_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoswap.b.rl",    0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOSWAP_B|MASK_RL, MASK_AMOSWAP_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoand.b.rl",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOAND_B|MASK_RL, MASK_AMOAND_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoor.b.rl",      0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOOR_B|MASK_RL, MASK_AMOOR_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoxor.b.rl",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOXOR_B|MASK_RL, MASK_AMOXOR_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amomax.b.rl",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAX_B|MASK_RL, MASK_AMOMAX_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amomaxu.b.rl",    0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAXU_B|MASK_RL, MASK_AMOMAXU_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amomin.b.rl",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMIN_B|MASK_RL, MASK_AMOMIN_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amominu.b.rl",    0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMINU_B|MASK_RL, MASK_AMOMINU_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoadd.b.aqrl",   0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOADD_B|MASK_AQRL, MASK_AMOADD_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoswap.b.aqrl",  0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOSWAP_B|MASK_AQRL, MASK_AMOSWAP_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoand.b.aqrl",   0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOAND_B|MASK_AQRL, MASK_AMOAND_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoor.b.aqrl",    0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOOR_B|MASK_AQRL, MASK_AMOOR_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoxor.b.aqrl",   0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOXOR_B|MASK_AQRL, MASK_AMOXOR_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amomax.b.aqrl",   0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAX_B|MASK_AQRL, MASK_AMOMAX_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amomaxu.b.aqrl",  0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAXU_B|MASK_AQRL, MASK_AMOMAXU_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amomin.b.aqrl",   0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMIN_B|MASK_AQRL, MASK_AMOMIN_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amominu.b.aqrl",  0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMINU_B|MASK_AQRL, MASK_AMOMINU_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoadd.h",        0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOADD_H, MASK_AMOADD_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoswap.h",       0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOSWAP_H, MASK_AMOSWAP_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoand.h",        0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOAND_H, MASK_AMOAND_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoor.h",         0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOOR_H, MASK_AMOOR_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoxor.h",        0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOXOR_H, MASK_AMOXOR_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amomax.h",        0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAX_H, MASK_AMOMAX_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amomaxu.h",       0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAXU_H, MASK_AMOMAXU_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amomin.h",        0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMIN_H, MASK_AMOMIN_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amominu.h",       0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMINU_H, MASK_AMOMINU_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoadd.h.aq",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOADD_H|MASK_AQ, MASK_AMOADD_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoswap.h.aq",    0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOSWAP_H|MASK_AQ, MASK_AMOSWAP_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoand.h.aq",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOAND_H|MASK_AQ, MASK_AMOAND_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoor.h.aq",      0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOOR_H|MASK_AQ, MASK_AMOOR_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoxor.h.aq",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOXOR_H|MASK_AQ, MASK_AMOXOR_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amomax.h.aq",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAX_H|MASK_AQ, MASK_AMOMAX_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amomaxu.h.aq",    0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAXU_H|MASK_AQ, MASK_AMOMAXU_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amomin.h.aq",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMIN_H|MASK_AQ, MASK_AMOMIN_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amominu.h.aq",    0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMINU_H|MASK_AQ, MASK_AMOMINU_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoadd.h.rl",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOADD_H|MASK_RL, MASK_AMOADD_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoswap.h.rl",    0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOSWAP_H|MASK_RL, MASK_AMOSWAP_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoand.h.rl",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOAND_H|MASK_RL, MASK_AMOAND_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoor.h.rl",      0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOOR_H|MASK_RL, MASK_AMOOR_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoxor.h.rl",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOXOR_H|MASK_RL, MASK_AMOXOR_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amomax.h.rl",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAX_H|MASK_RL, MASK_AMOMAX_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amomaxu.h.rl",    0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAXU_H|MASK_RL, MASK_AMOMAXU_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amomin.h.rl",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMIN_H|MASK_RL, MASK_AMOMIN_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amominu.h.rl",    0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMINU_H|MASK_RL, MASK_AMOMINU_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoadd.h.aqrl",   0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOADD_H|MASK_AQRL, MASK_AMOADD_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoswap.h.aqrl",  0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOSWAP_H|MASK_AQRL, MASK_AMOSWAP_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoand.h.aqrl",   0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOAND_H|MASK_AQRL, MASK_AMOAND_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoor.h.aqrl",    0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOOR_H|MASK_AQRL, MASK_AMOOR_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoxor.h.aqrl",   0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOXOR_H|MASK_AQRL, MASK_AMOXOR_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amomax.h.aqrl",   0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAX_H|MASK_AQRL, MASK_AMOMAX_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amomaxu.h.aqrl",  0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAXU_H|MASK_AQRL, MASK_AMOMAXU_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amomin.h.aqrl",   0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMIN_H|MASK_AQRL, MASK_AMOMIN_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amominu.h.aqrl",  0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMINU_H|MASK_AQRL, MASK_AMOMINU_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+
 /* Multiply/Divide instruction subset.  */
 {"mul",        0, INSN_CLASS_ZCB_AND_ZMMUL, "Cs,Cw,Ct",  MATCH_C_MUL, MASK_C_MUL, match_opcode, INSN_ALIAS },
 {"mul",        0, INSN_CLASS_ZMMUL, "d,s,t",     MATCH_MUL, MASK_MUL, match_opcode, 0 },