forked from Imagelibrary/binutils-gdb
2442d8466e
Some SVE instructions count the number of elements in a given vector pattern and allow a scale factor of [1, 16] to be applied to the result. This scale factor is written ", MUL #n", where "MUL" is a new operator. E.g.: UQINCD X0, POW2, MUL #2 This patch adds support for this kind of operand. All existing operators were shifts of some kind, so there was a natural range of [0, 63] regardless of context. This was then narrowered further by later checks (e.g. to [0, 31] when used for 32-bit values). In contrast, MUL doesn't really have a natural context-independent range. Rather than pick one arbitrarily, it seemed better to make the "shift" amount a full 64-bit value and leave the range test to the usual operand-checking code. I've rearranged the fields of aarch64_opnd_info so that this doesn't increase the size of the structure (although I don't think its size is critical anyway). include/ * opcode/aarch64.h (AARCH64_OPND_SVE_PATTERN_SCALED): New aarch64_opnd. (AARCH64_MOD_MUL): New aarch64_modifier_kind. (aarch64_opnd_info): Make shifter.amount an int64_t and rearrange the fields. opcodes/ * aarch64-tbl.h (AARCH64_OPERANDS): Add an entry for AARCH64_OPND_SVE_PATTERN_SCALED. * aarch64-opc.h (FLD_SVE_imm4): New aarch64_field_kind. * aarch64-opc.c (fields): Add a corresponding entry. (set_multiplier_out_of_range_error): New function. (aarch64_operand_modifiers): Add entry for AARCH64_MOD_MUL. (operand_general_constraint_met_p): Handle AARCH64_OPND_SVE_PATTERN_SCALED. (print_register_offset_address): Use PRIi64 to print the shift amount. (aarch64_print_operand): Likewise. Handle AARCH64_OPND_SVE_PATTERN_SCALED. * aarch64-opc-2.c: Regenerate. * aarch64-asm.h (ins_sve_scale): New inserter. * aarch64-asm.c (aarch64_ins_sve_scale): New function. * aarch64-asm-2.c: Regenerate. * aarch64-dis.h (ext_sve_scale): New inserter. * aarch64-dis.c (aarch64_ext_sve_scale): New function. * aarch64-dis-2.c: Regenerate. gas/ * config/tc-aarch64.c (SHIFTED_MUL): New parse_shift_mode. (parse_shift): Handle it. Reject AARCH64_MOD_MUL for all other shift modes. Skip range tests for AARCH64_MOD_MUL. (process_omitted_operand): Handle AARCH64_OPND_SVE_PATTERN_SCALED. (parse_operands): Likewise.