LoongArch: Add Loongson SX base instruction support.

gcc/ChangeLog:

	* config/loongarch/constraints.md (M): Add Loongson LSX base instruction support.
	(N): Ditto.
	(O): Ditto.
	(P): Ditto.
	(R): Ditto.
	(S): Ditto.
	(YG): Ditto.
	(YA): Ditto.
	(YB): Ditto.
	(Yb): Ditto.
	(Yh): Ditto.
	(Yw): Ditto.
	(YI): Ditto.
	(YC): Ditto.
	(YZ): Ditto.
	(Unv5): Ditto.
	(Uuv5): Ditto.
	(Usv5): Ditto.
	(Uuv6): Ditto.
	(Urv8): Ditto.
	* config/loongarch/genopts/loongarch.opt.in: Ditto.
	* config/loongarch/loongarch-builtins.cc (loongarch_gen_const_int_vector): Ditto.
	* config/loongarch/loongarch-modes.def (VECTOR_MODES): Ditto.
	(VECTOR_MODE): Ditto.
	(INT_MODE): Ditto.
	* config/loongarch/loongarch-protos.h (loongarch_split_move_insn_p): Ditto.
	(loongarch_split_move_insn): Ditto.
	(loongarch_split_128bit_move): Ditto.
	(loongarch_split_128bit_move_p): Ditto.
	(loongarch_split_lsx_copy_d): Ditto.
	(loongarch_split_lsx_insert_d): Ditto.
	(loongarch_split_lsx_fill_d): Ditto.
	(loongarch_expand_vec_cmp): Ditto.
	(loongarch_const_vector_same_val_p): Ditto.
	(loongarch_const_vector_same_bytes_p): Ditto.
	(loongarch_const_vector_same_int_p): Ditto.
	(loongarch_const_vector_shuffle_set_p): Ditto.
	(loongarch_const_vector_bitimm_set_p): Ditto.
	(loongarch_const_vector_bitimm_clr_p): Ditto.
	(loongarch_lsx_vec_parallel_const_half): Ditto.
	(loongarch_gen_const_int_vector): Ditto.
	(loongarch_lsx_output_division): Ditto.
	(loongarch_expand_vector_init): Ditto.
	(loongarch_expand_vec_unpack): Ditto.
	(loongarch_expand_vec_perm): Ditto.
	(loongarch_expand_vector_extract): Ditto.
	(loongarch_expand_vector_reduc): Ditto.
	(loongarch_ldst_scaled_shift): Ditto.
	(loongarch_expand_vec_cond_expr): Ditto.
	(loongarch_expand_vec_cond_mask_expr): Ditto.
	(loongarch_builtin_vectorized_function): Ditto.
	(loongarch_gen_const_int_vector_shuffle): Ditto.
	(loongarch_build_signbit_mask): Ditto.
	* config/loongarch/loongarch.cc (loongarch_pass_aggregate_num_fpr): Ditto.
	(loongarch_setup_incoming_varargs): Ditto.
	(loongarch_emit_move): Ditto.
	(loongarch_const_vector_bitimm_set_p): Ditto.
	(loongarch_const_vector_bitimm_clr_p): Ditto.
	(loongarch_const_vector_same_val_p): Ditto.
	(loongarch_const_vector_same_bytes_p): Ditto.
	(loongarch_const_vector_same_int_p): Ditto.
	(loongarch_const_vector_shuffle_set_p): Ditto.
	(loongarch_symbol_insns): Ditto.
	(loongarch_cannot_force_const_mem): Ditto.
	(loongarch_valid_offset_p): Ditto.
	(loongarch_valid_index_p): Ditto.
	(loongarch_classify_address): Ditto.
	(loongarch_address_insns): Ditto.
	(loongarch_ldst_scaled_shift): Ditto.
	(loongarch_const_insns): Ditto.
	(loongarch_split_move_insn_p): Ditto.
	(loongarch_subword_at_byte): Ditto.
	(loongarch_legitimize_move): Ditto.
	(loongarch_builtin_vectorization_cost): Ditto.
	(loongarch_split_move_p): Ditto.
	(loongarch_split_move): Ditto.
	(loongarch_split_move_insn): Ditto.
	(loongarch_output_move_index_float): Ditto.
	(loongarch_split_128bit_move_p): Ditto.
	(loongarch_split_128bit_move): Ditto.
	(loongarch_split_lsx_copy_d): Ditto.
	(loongarch_split_lsx_insert_d): Ditto.
	(loongarch_split_lsx_fill_d): Ditto.
	(loongarch_output_move): Ditto.
	(loongarch_extend_comparands): Ditto.
	(loongarch_print_operand_reloc): Ditto.
	(loongarch_print_operand): Ditto.
	(loongarch_hard_regno_mode_ok_uncached): Ditto.
	(loongarch_hard_regno_call_part_clobbered): Ditto.
	(loongarch_hard_regno_nregs): Ditto.
	(loongarch_class_max_nregs): Ditto.
	(loongarch_can_change_mode_class): Ditto.
	(loongarch_mode_ok_for_mov_fmt_p): Ditto.
	(loongarch_secondary_reload): Ditto.
	(loongarch_vector_mode_supported_p): Ditto.
	(loongarch_preferred_simd_mode): Ditto.
	(loongarch_autovectorize_vector_modes): Ditto.
	(loongarch_lsx_output_division): Ditto.
	(loongarch_option_override_internal): Ditto.
	(loongarch_hard_regno_caller_save_mode): Ditto.
	(MAX_VECT_LEN): Ditto.
	(loongarch_spill_class): Ditto.
	(struct expand_vec_perm_d): Ditto.
	(loongarch_promote_function_mode): Ditto.
	(loongarch_expand_vselect): Ditto.
	(loongarch_starting_frame_offset): Ditto.
	(loongarch_expand_vselect_vconcat): Ditto.
	(TARGET_ASM_ALIGNED_DI_OP): Ditto.
	(TARGET_OPTION_OVERRIDE): Ditto.
	(TARGET_LEGITIMIZE_ADDRESS): Ditto.
	(TARGET_ASM_SELECT_RTX_SECTION): Ditto.
	(TARGET_ASM_FUNCTION_RODATA_SECTION): Ditto.
	(loongarch_expand_lsx_shuffle): Ditto.
	(TARGET_SCHED_INIT): Ditto.
	(TARGET_SCHED_REORDER): Ditto.
	(TARGET_SCHED_REORDER2): Ditto.
	(TARGET_SCHED_VARIABLE_ISSUE): Ditto.
	(TARGET_SCHED_ADJUST_COST): Ditto.
	(TARGET_SCHED_ISSUE_RATE): Ditto.
	(TARGET_SCHED_FIRST_CYCLE_MULTIPASS_DFA_LOOKAHEAD): Ditto.
	(TARGET_FUNCTION_OK_FOR_SIBCALL): Ditto.
	(TARGET_VALID_POINTER_MODE): Ditto.
	(TARGET_REGISTER_MOVE_COST): Ditto.
	(TARGET_MEMORY_MOVE_COST): Ditto.
	(TARGET_RTX_COSTS): Ditto.
	(TARGET_ADDRESS_COST): Ditto.
	(TARGET_IN_SMALL_DATA_P): Ditto.
	(TARGET_PREFERRED_RELOAD_CLASS): Ditto.
	(TARGET_ASM_FILE_START_FILE_DIRECTIVE): Ditto.
	(TARGET_EXPAND_BUILTIN_VA_START): Ditto.
	(loongarch_expand_vec_perm): Ditto.
	(TARGET_PROMOTE_FUNCTION_MODE): Ditto.
	(TARGET_RETURN_IN_MEMORY): Ditto.
	(TARGET_FUNCTION_VALUE): Ditto.
	(TARGET_LIBCALL_VALUE): Ditto.
	(loongarch_try_expand_lsx_vshuf_const): Ditto.
	(TARGET_ASM_OUTPUT_MI_THUNK): Ditto.
	(TARGET_ASM_CAN_OUTPUT_MI_THUNK): Ditto.
	(TARGET_PRINT_OPERAND): Ditto.
	(TARGET_PRINT_OPERAND_ADDRESS): Ditto.
	(TARGET_PRINT_OPERAND_PUNCT_VALID_P): Ditto.
	(TARGET_SETUP_INCOMING_VARARGS): Ditto.
	(TARGET_STRICT_ARGUMENT_NAMING): Ditto.
	(TARGET_MUST_PASS_IN_STACK): Ditto.
	(TARGET_PASS_BY_REFERENCE): Ditto.
	(TARGET_ARG_PARTIAL_BYTES): Ditto.
	(TARGET_FUNCTION_ARG): Ditto.
	(TARGET_FUNCTION_ARG_ADVANCE): Ditto.
	(TARGET_FUNCTION_ARG_BOUNDARY): Ditto.
	(TARGET_SCALAR_MODE_SUPPORTED_P): Ditto.
	(TARGET_INIT_BUILTINS): Ditto.
	(loongarch_expand_vec_perm_const_1): Ditto.
	(loongarch_expand_vec_perm_const_2): Ditto.
	(loongarch_vectorize_vec_perm_const): Ditto.
	(loongarch_cpu_sched_reassociation_width): Ditto.
	(loongarch_sched_reassociation_width): Ditto.
	(loongarch_expand_vector_extract): Ditto.
	(emit_reduc_half): Ditto.
	(loongarch_expand_vector_reduc): Ditto.
	(loongarch_expand_vec_unpack): Ditto.
	(loongarch_lsx_vec_parallel_const_half): Ditto.
	(loongarch_constant_elt_p): Ditto.
	(loongarch_gen_const_int_vector_shuffle): Ditto.
	(loongarch_expand_vector_init): Ditto.
	(loongarch_expand_lsx_cmp): Ditto.
	(loongarch_expand_vec_cond_expr): Ditto.
	(loongarch_expand_vec_cond_mask_expr): Ditto.
	(loongarch_expand_vec_cmp): Ditto.
	(loongarch_case_values_threshold): Ditto.
	(loongarch_build_const_vector): Ditto.
	(loongarch_build_signbit_mask): Ditto.
	(loongarch_builtin_support_vector_misalignment): Ditto.
	(TARGET_ASM_ALIGNED_HI_OP): Ditto.
	(TARGET_ASM_ALIGNED_SI_OP): Ditto.
	(TARGET_VECTORIZE_BUILTIN_VECTORIZATION_COST): Ditto.
	(TARGET_VECTOR_MODE_SUPPORTED_P): Ditto.
	(TARGET_VECTORIZE_PREFERRED_SIMD_MODE): Ditto.
	(TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_MODES): Ditto.
	(TARGET_VECTORIZE_VEC_PERM_CONST): Ditto.
	(TARGET_SCHED_REASSOCIATION_WIDTH): Ditto.
	(TARGET_CASE_VALUES_THRESHOLD): Ditto.
	(TARGET_HARD_REGNO_CALL_PART_CLOBBERED): Ditto.
	(TARGET_VECTORIZE_SUPPORT_VECTOR_MISALIGNMENT): Ditto.
	* config/loongarch/loongarch.h (TARGET_SUPPORTS_WIDE_INT): Ditto.
	(UNITS_PER_LSX_REG): Ditto.
	(BITS_PER_LSX_REG): Ditto.
	(BIGGEST_ALIGNMENT): Ditto.
	(LSX_REG_FIRST): Ditto.
	(LSX_REG_LAST): Ditto.
	(LSX_REG_NUM): Ditto.
	(LSX_REG_P): Ditto.
	(LSX_REG_RTX_P): Ditto.
	(IMM13_OPERAND): Ditto.
	(LSX_SUPPORTED_MODE_P): Ditto.
	* config/loongarch/loongarch.md (unknown,add,sub,not,nor,and,or,xor): Ditto.
	(unknown,add,sub,not,nor,and,or,xor,simd_add): Ditto.
	(unknown,none,QI,HI,SI,DI,TI,SF,DF,TF,FCC): Ditto.
	(mode" ): Ditto.
	(DF): Ditto.
	(SF): Ditto.
	(sf): Ditto.
	(DI): Ditto.
	(SI): Ditto.
	* config/loongarch/loongarch.opt: Ditto.
	* config/loongarch/predicates.md (const_lsx_branch_operand): Ditto.
	(const_uimm3_operand): Ditto.
	(const_8_to_11_operand): Ditto.
	(const_12_to_15_operand): Ditto.
	(const_uimm4_operand): Ditto.
	(const_uimm6_operand): Ditto.
	(const_uimm7_operand): Ditto.
	(const_uimm8_operand): Ditto.
	(const_imm5_operand): Ditto.
	(const_imm10_operand): Ditto.
	(const_imm13_operand): Ditto.
	(reg_imm10_operand): Ditto.
	(aq8b_operand): Ditto.
	(aq8h_operand): Ditto.
	(aq8w_operand): Ditto.
	(aq8d_operand): Ditto.
	(aq10b_operand): Ditto.
	(aq10h_operand): Ditto.
	(aq10w_operand): Ditto.
	(aq10d_operand): Ditto.
	(aq12b_operand): Ditto.
	(aq12h_operand): Ditto.
	(aq12w_operand): Ditto.
	(aq12d_operand): Ditto.
	(const_m1_operand): Ditto.
	(reg_or_m1_operand): Ditto.
	(const_exp_2_operand): Ditto.
	(const_exp_4_operand): Ditto.
	(const_exp_8_operand): Ditto.
	(const_exp_16_operand): Ditto.
	(const_exp_32_operand): Ditto.
	(const_0_or_1_operand): Ditto.
	(const_0_to_3_operand): Ditto.
	(const_0_to_7_operand): Ditto.
	(const_2_or_3_operand): Ditto.
	(const_4_to_7_operand): Ditto.
	(const_8_to_15_operand): Ditto.
	(const_16_to_31_operand): Ditto.
	(qi_mask_operand): Ditto.
	(hi_mask_operand): Ditto.
	(si_mask_operand): Ditto.
	(d_operand): Ditto.
	(db4_operand): Ditto.
	(db7_operand): Ditto.
	(db8_operand): Ditto.
	(ib3_operand): Ditto.
	(sb4_operand): Ditto.
	(sb5_operand): Ditto.
	(sb8_operand): Ditto.
	(sd8_operand): Ditto.
	(ub4_operand): Ditto.
	(ub8_operand): Ditto.
	(uh4_operand): Ditto.
	(uw4_operand): Ditto.
	(uw5_operand): Ditto.
	(uw6_operand): Ditto.
	(uw8_operand): Ditto.
	(addiur2_operand): Ditto.
	(addiusp_operand): Ditto.
	(andi16_operand): Ditto.
	(movep_src_register): Ditto.
	(movep_src_operand): Ditto.
	(fcc_reload_operand): Ditto.
	(muldiv_target_operand): Ditto.
	(const_vector_same_val_operand): Ditto.
	(const_vector_same_simm5_operand): Ditto.
	(const_vector_same_uimm5_operand): Ditto.
	(const_vector_same_ximm5_operand): Ditto.
	(const_vector_same_uimm6_operand): Ditto.
	(par_const_vector_shf_set_operand): Ditto.
	(reg_or_vector_same_val_operand): Ditto.
	(reg_or_vector_same_simm5_operand): Ditto.
	(reg_or_vector_same_uimm5_operand): Ditto.
	(reg_or_vector_same_ximm5_operand): Ditto.
	(reg_or_vector_same_uimm6_operand): Ditto.
	* doc/md.texi: Ditto.
	* config/loongarch/lsx.md: New file.

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