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This patch adds support for addresses of the form:
[<base>, #<offset>, MUL VL]
This involves adding a new AARCH64_MOD_MUL_VL modifier, which is
why I split it out from the other addressing modes.
For LD2, LD3 and LD4, the offset must be a multiple of the structure
size, so for LD3 the possible values are 0, 3, 6, .... The patch
therefore extends value_aligned_p to handle non-power-of-2 alignments.
include/
* opcode/aarch64.h (AARCH64_OPND_SVE_ADDR_RI_S4xVL): New aarch64_opnd.
(AARCH64_OPND_SVE_ADDR_RI_S4x2xVL, AARCH64_OPND_SVE_ADDR_RI_S4x3xVL)
(AARCH64_OPND_SVE_ADDR_RI_S4x4xVL, AARCH64_OPND_SVE_ADDR_RI_S6xVL)
(AARCH64_OPND_SVE_ADDR_RI_S9xVL): Likewise.
(AARCH64_MOD_MUL_VL): New aarch64_modifier_kind.
opcodes/
* aarch64-tbl.h (AARCH64_OPERANDS): Add entries for new MUL VL
operands.
* aarch64-opc.c (aarch64_operand_modifiers): Initialize
the AARCH64_MOD_MUL_VL entry.
(value_aligned_p): Cope with non-power-of-two alignments.
(operand_general_constraint_met_p): Handle the new MUL VL addresses.
(print_immediate_offset_address): Likewise.
(aarch64_print_operand): Likewise.
* aarch64-opc-2.c: Regenerate.
* aarch64-asm.h (ins_sve_addr_ri_s4xvl, ins_sve_addr_ri_s6xvl)
(ins_sve_addr_ri_s9xvl): New inserters.
* aarch64-asm.c (aarch64_ins_sve_addr_ri_s4xvl): New function.
(aarch64_ins_sve_addr_ri_s6xvl): Likewise.
(aarch64_ins_sve_addr_ri_s9xvl): Likewise.
* aarch64-asm-2.c: Regenerate.
* aarch64-dis.h (ext_sve_addr_ri_s4xvl, ext_sve_addr_ri_s6xvl)
(ext_sve_addr_ri_s9xvl): New extractors.
* aarch64-dis.c (aarch64_ext_sve_addr_reg_mul_vl): New function.
(aarch64_ext_sve_addr_ri_s4xvl): Likewise.
(aarch64_ext_sve_addr_ri_s6xvl): Likewise.
(aarch64_ext_sve_addr_ri_s9xvl): Likewise.
* aarch64-dis-2.c: Regenerate.
gas/
* config/tc-aarch64.c (SHIFTED_NONE, SHIFTED_MUL_VL): New
parse_shift_modes.
(parse_shift): Handle SHIFTED_MUL_VL.
(parse_address_main): Add an imm_shift_mode parameter.
(parse_address, parse_sve_address): Update accordingly.
(parse_operands): Handle MUL VL addressing modes.
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