Three-part patch set from Tsukasa OI to support zmmul in assembler.
The 'Zmmul' is a RISC-V extension consisting of only multiply instructions
(a subset of 'M' which has multiply and divide instructions).
bfd/
* elfxx-riscv.c (riscv_implicit_subsets): Add 'Zmmul' implied by 'M'.
(riscv_supported_std_z_ext): Add 'Zmmul' extension.
(riscv_multi_subset_supports): Add handling for new instruction class.
gas/
* testsuite/gas/riscv/attribute-09.d: Updated implicit 'Zmmul' by 'M'.
* testsuite/gas/riscv/option-arch-02.d: Likewise.
* testsuite/gas/riscv/m-ext.s: New test.
* testsuite/gas/riscv/m-ext-32.d: New test (RV32).
* testsuite/gas/riscv/m-ext-64.d: New test (RV64).
* testsuite/gas/riscv/zmmul-32.d: New expected output.
* testsuite/gas/riscv/zmmul-64.d: Likewise.
* testsuite/gas/riscv/m-ext-fail-xlen-32.d: New test (failure
by using RV64-only instructions in RV32).
* testsuite/gas/riscv/m-ext-fail-xlen-32.l: Likewise.
* testsuite/gas/riscv/m-ext-fail-zmmul-32.d: New failure test
(RV32 + Zmmul but with no M).
* testsuite/gas/riscv/m-ext-fail-zmmul-32.l: Likewise.
* testsuite/gas/riscv/m-ext-fail-zmmul-64.d: New failure test
(RV64 + Zmmul but with no M).
* testsuite/gas/riscv/m-ext-fail-zmmul-64.l: Likewise.
* testsuite/gas/riscv/m-ext-fail-noarch-64.d: New failure test
(no Zmmul or M).
* testsuite/gas/riscv/m-ext-fail-noarch-64.l: Likewise.
include/
* opcode/riscv.h (enum riscv_insn_class): Added INSN_CLASS_ZMMUL.
ld/
* testsuite/ld-riscv-elf/attr-merge-arch-01.d: We don't care zmmul in
these testcases, so just replaced m by a.
* testsuite/ld-riscv-elf/attr-merge-arch-01a.s: Likewise.
* testsuite/ld-riscv-elf/attr-merge-arch-01b.s: Likewise.
* testsuite/ld-riscv-elf/attr-merge-arch-02.d: Likewise.
* testsuite/ld-riscv-elf/attr-merge-arch-02a.s: Likewise.
* testsuite/ld-riscv-elf/attr-merge-arch-03.d: Likewise.
* testsuite/ld-riscv-elf/attr-merge-arch-03a.s: Likewise.
* testsuite/ld-riscv-elf/attr-merge-user-ext-01.d: Likewise.
* testsuite/ld-riscv-elf/attr-merge-user-ext-rv32i2p1_a2p0.s: Renamed.
* testsuite/ld-riscv-elf/attr-merge-user-ext-rv32i2p1_a2p1.s: Renamed.
opcodes/
* riscv-opc.c (riscv_opcodes): Updated multiply instructions to zmmul.
The extension version checking logic is really just too complicated to
encode into the linker, trying to do so causes more harm than good.
This removes the checks and the associated tests, leaving the logic to
keep the largest version of each extension linked into the target.
bfd/
* elfnn-riscv.c (riscv_version_mismatch): Rename to
riscv_update_subset_version, and stop reporting warnings on
version mismatches.
(riscv_merge_std_ext): Adjust calls to riscv_version_mismatch.
(riscv_merge_multi_letter_ext): Likewise.
ld/
* testsuite/ld-riscv-elf/attr-merge-arch-failed-01.d: Remove
* testsuite/ld-riscv-elf/attr-merge-arch-failed-01a.s: Likewise
* testsuite/ld-riscv-elf/attr-merge-arch-failed-01b.s: Likewise
* testsuite/ld-riscv-elf/attr-merge-arch-failed-02.d: Likewise
* testsuite/ld-riscv-elf/attr-merge-arch-failed-02a.s: Likewise
* testsuite/ld-riscv-elf/attr-merge-arch-failed-02b.s: Likewise
* testsuite/ld-riscv-elf/attr-merge-arch-failed-02c.s: Likewise
* testsuite/ld-riscv-elf/attr-merge-arch-failed-02d.s: Likewise
* testsuite/ld-riscv-elf/attr-merge-user-ext-01.d: New test.
* testsuite/ld-riscv-elf/attr-merge-user-ext-rv32i21_m2p0.s:
Likewise.
* testsuite/ld-riscv-elf/attr-merge-user-ext-rv32i21_m2p1.s:
Likewise.
* testsuite/ld-riscv-elf/ld-riscv-elf.exp: Remove obselete
attr-merge-arch-failed-{01,02}, replace with
attr-merge-user-ext-01.
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
