From b3a88ae94be337a1ee46bc2dddea4a04e059bb6f Mon Sep 17 00:00:00 2001 From: Bob Wilson Date: Fri, 8 Oct 2004 00:22:12 +0000 Subject: bfd ChangeLog * elf32-xtensa.c (elf32xtensa_size_opt): New global variable. (xtensa_default_isa): Global variable moved here from xtensa-isa.c. (elf32xtensa_no_literal_movement): New global variable. (elf_howto_table): Add entries for new relocations. (elf_xtensa_reloc_type_lookup): Handle new relocations. (property_table_compare): When addresses are equal, compare sizes and various property flags. (property_table_matches): New. (xtensa_read_table_entries): Extend to read new property tables. Add output_addr parameter to indicate that output addresses should be used. Use bfd_get_section_limit. (elf_xtensa_find_property_entry): New. (elf_xtensa_in_literal_pool): Use elf_xtensa_find_property_entry. (elf_xtensa_check_relocs): Handle new relocations. (elf_xtensa_do_reloc): Use bfd_get_section_limit. Handle new relocations. Use new xtensa-isa.h functions. (build_encoding_error_message): Remove encode_result parameter. Add new target_address parameter used to detect alignment errors. (elf_xtensa_relocate_section): Use bfd_get_section_limit. Clean up error handling. Use new is_operand_relocation function. (elf_xtensa_combine_prop_entries, elf_xtensa_merge_private_bfd_data): Use underbar macro for error messages. Formatting. (get_const16_opcode): New. (get_l32r_opcode): Add a separate flag for initialization. (get_relocation_opnd): Operand number is no longer explicit in the relocation. Change to decode the opcode and analyze its operands. (get_relocation_slot): New. (get_relocation_opcode): Add bfd parameter. Use bfd_get_section_limit. Use new xtensa-isa.h functions to handle multislot instructions. (is_l32r_relocation): Add bfd parameter. Use is_operand_relocation. (get_asm_simplify_size, is_alt_relocation, is_operand_relocation, insn_decode_len, insn_decode_opcode, check_branch_target_aligned, check_loop_aligned, check_branch_target_aligned_address, narrowable, widenable, narrow_instruction, widen_instruction, op_single_fmt_table, get_single_format, init_op_single_format_table): New. (elf_xtensa_do_asm_simplify): Add error_message parameter and use it instead of calling _bfd_error_handler. Use new xtensa-isa.h functions. (contract_asm_expansion): Add error_message parameter and pass it to elf_xtensa_do_asm_simplify. Replace use of R_XTENSA_OP0 relocation with R_XTENSA_SLOT0_OP. (get_expanded_call_opcode): Extend to handle either L32R or CONST16 instructions. Use new xtensa-isa.h functions. (r_reloc struct): Add new virtual_offset field. (r_reloc_init): Add contents and content_length parameters. Set virtual_offset field to zero. Add contents to target_offset field for partial_inplace relocations. (r_reloc_is_defined): Check for null. (print_r_reloc): New debug function. (source_reloc struct): Replace xtensa_operand field with pair of the opcode and the operand position. Add is_abs_literal field. (init_source_reloc): Specify operand by opcode/position pair. Set is_abs_literal field. (source_reloc_compare): When target_offsets are equal, compare other fields to make sorting predictable. (literal_value struct): Add is_abs_literal field. (value_map_hash_table struct): Add has_last_loc and last_loc fields. (init_literal_value): New. (is_same_value): Replace with ... (literal_value_equal): ... this function. Add comparisons of virtual_offset and is_abs_literal fields. (value_map_hash_table_init): Use bfd_zmalloc. Check for allocation failure. Initialize has_last_loc field. (value_map_hash_table_delete): New. (hash_literal_value): Rename to ... (literal_value_hash): ... this. Include is_abs_literal flag and virtual_offset field in the hash value. (get_cached_value): Rename to ... (value_map_get_cached_value): ... this. Update calls to literal_value_hash and literal_value_equal. (add_value_map): Check for allocation failure. Update calls to value_map_get_cached_value and literal_value_hash. (text_action, text_action_list, text_action_t): New types. (find_fill_action, compute_removed_action_diff, adjust_fill_action, text_action_add, text_action_add_literal, offset_with_removed_text, offset_with_removed_text_before_fill, find_insn_action, print_action_list, print_removed_literals): New. (offset_with_removed_literals): Delete. (xtensa_relax_info struct): Add is_relaxable_asm_section, action_list, fix_array, fix_array_count, allocated_relocs, relocs_count, and allocated_relocs_count fields. (init_xtensa_relax_info): Initialize new fields. (reloc_bfd_fix struct): Add new translated field. (reloc_bfd_fix_init): Add translated parameter and use it to set the translated field. (fix_compare, cache_fix_array): New. (get_bfd_fix): Remove fix_list parameter and get all relax_info for the section via get_xtensa_relax_info. Use cache_fix_array to set up sorted fix_array and use bsearch instead of linear search. (section_cache_t): New struct. (init_section_cache, section_cache_section, clear_section_cache): New. (ebb_t, ebb_target_enum, proposed_action, ebb_constraint): New types. (init_ebb_constraint, free_ebb_constraint, init_ebb, extend_ebb_bounds, extend_ebb_bounds_forward, extend_ebb_bounds_backward, insn_block_decodable_len, ebb_propose_action, ebb_add_proposed_action): New. (retrieve_contents): Use bfd_get_section_limit. (elf_xtensa_relax_section): Add relocations_analyzed flag. Update call to compute_removed_literals. Free value_map_hash_table when no longer needed. (analyze_relocations): Check is_relaxable_asm_section flag. Call compute_text_actions for all sections. (find_relaxable_sections): Mark sections as relaxable if they contain ASM_EXPAND relocations that can be optimized. Adjust r_reloc_init call. Increment relax_info src_count field only for appropriate relocation types. Remove is_literal_section check. (collect_source_relocs): Use bfd_get_section_limit. Adjust calls to r_reloc_init and find_associated_l32r_irel. Check is_relaxable_asm_section flag. Handle L32R instructions with absolute literals. Pass is_abs_literal flag to init_source_reloc. (is_resolvable_asm_expansion): Use bfd_get_section_limit. Check for CONST16 instructions. Adjust calls to r_reloc_init and pcrel_reloc_fits. Handle weak symbols conservatively. (find_associated_l32r_irel): Add bfd parameter and pass it to is_l32r_relocation. (compute_text_actions, compute_ebb_proposed_actions, compute_ebb_actions, check_section_ebb_pcrels_fit, check_section_ebb_reduces, text_action_add_proposed, compute_fill_extra_space): New. (remove_literals): Replace with ... (compute_removed_literals): ... this function. Call init_section_cache. Use bfd_get_section_limit. Sort internal_relocs. Call xtensa_read_table_entries to get the property table. Skip relocations other than R_XTENSA_32 and R_XTENSA_PLT. Use new is_removable_literal, remove_dead_literal, and identify_literal_placement functions. (get_irel_at_offset): Rewrite to use bsearch on sorted relocations instead of linear search. (is_removable_literal, remove_dead_literal, identify_literal_placement): New. (relocations_reach): Update check for literal not referenced by any PC-relative relocations. Adjust call to pcrel_reloc_fits. (coalesce_shared_literal, move_shared_literal): New. (relax_section): Use bfd_get_section_limit. Call translate_section_fixes. Update calls to r_reloc_init and offset_with_removed_text. Check new is_relaxable_asm_section flag. Add call to pin_internal_relocs. Add special handling for R_XTENSA_ASM_SIMPLIFY and R_XTENSA_DIFF* relocs. Use virtual_offset info to calculate new addend_displacement variable. Replace code for deleting literals with more general code to perform the actions determined by the action_list for the section. (translate_section_fixes, translate_reloc_bfd_fix): New. (translate_reloc): Check new is_relaxable_asm_section flag. Call find_removed_literal only if is_operand_relocation. Update call to offset_with_removed_text. Use new target_offset and removed_bytes variables. (move_literal): New. (relax_property_section): Use bfd_get_section_limit. Set new is_full_prop_section flag and handle new property tables. Update calls to r_reloc_init and offset_with_removed_text. Check is_relaxable_asm_section flag. Handle expansion of zero-sized unreachable entries, with use of offset_with_removed_text_before_fill. For relocatable links, combine entries only for literal tables. (relax_section_symbols): Check is_relaxable_asm_section flag. Update calls to offset_with_removed_text. Translate st_size field for function symbols. (do_fix_for_relocatable_link): Change to return bfd_boolean to indicate failure. Add contents parameter. Update call to get_bfd_fix. Update call to r_reloc_init. Call _bfd_error_handler and return FALSE for R_XTENSA_ASM_EXPAND relocs. (do_fix_for_final_link): Add input_bfd and contents parameters. Update call to get_bfd_fix. Include offset from contents for partial_inplace relocations. (is_reloc_sym_weak): New. (pcrel_reloc_fits): Use new xtensa-isa.h functions. (prop_sec_len): New. (xtensa_is_property_section): Handle new property sections. (is_literal_section): Delete. (internal_reloc_compare): When r_offset matches, compare r_info and r_addend to make sorting predictable. (internal_reloc_matches): New. (xtensa_get_property_section_name): Handle new property sections. (xtensa_get_property_predef_flags): New. (xtensa_callback_required_dependence): Use bfd_get_section_limit. Update calls to xtensa_isa_init, is_l32r_relocation, and r_reloc_init. * xtensa-isa.c (xtensa_default_isa): Moved to elf32-xtensa.c. (xtisa_errno, xtisa_error_msg): New variables. (xtensa_isa_errno, xtensa_isa_error_msg): New. (xtensa_insnbuf_alloc): Add error handling. (xtensa_insnbuf_to_chars): Add num_chars parameter. Update to use xtensa_format_decode. Add error handling. (xtensa_insnbuf_from_chars): Add num_chars parameter. Decode the instruction length to find the number of bytes to copy. (xtensa_isa_init): Add error handling. Replace calls to xtensa_load_isa and xtensa_extend_isa with code to initialize lookup tables in the xtensa_modules structure. (xtensa_check_isa_config, xtensa_add_isa, xtensa_load_isa, xtensa_extend_isa): Delete. (xtensa_isa_free): Change to only free lookup tables. (opname_lookup_compare): Replace with ... (xtensa_isa_name_compare): ... this function. Use strcasecmp. (xtensa_insn_maxlength): Rename to ... (xtensa_isa_maxlength): ... this. (xtensa_insn_length): Delete. (xtensa_insn_length_from_first_byte): Replace with ... (xtensa_isa_length_from_chars): ... this function. (xtensa_num_opcodes): Rename to ... (xtensa_isa_num_opcodes): ... this. (xtensa_isa_num_pipe_stages, xtensa_isa_num_formats, xtensa_isa_num_regfiles, xtensa_isa_num_stages, xtensa_isa_num_sysregs, xtensa_isa_num_interfaces, xtensa_isa_num_funcUnits, xtensa_format_name, xtensa_format_lookup, xtensa_format_decode, xtensa_format_encode, xtensa_format_length, xtensa_format_num_slots, xtensa_format_slot_nop_opcode, xtensa_format_get_slot, xtensa_format_set_slot): New functions. (xtensa_opcode_lookup): Add error handling. (xtensa_decode_insn): Replace with ... (xtensa_opcode_decode): ... this function, with new format and slot parameters. Add error handling. (xtensa_encode_insn): Replace with ... (xtensa_opcode_encode): ... this function, which does the encoding via one of the entries in the "encode_fns" array. Add error handling. (xtensa_opcode_name): Add error handling. (xtensa_opcode_is_branch, xtensa_opcode_is_jump, xtensa_opcode_is_loop, xtensa_opcode_is_call): New. (xtensa_num_operands): Replace with ... (xtensa_opcode_num_operands): ... this function. Add error handling. (xtensa_opcode_num_stateOperands, xtensa_opcode_num_interfaceOperands, xtensa_opcode_num_funcUnit_uses, xtensa_opcode_funcUnit_use, xtensa_operand_name, xtensa_operand_is_visible): New. (xtensa_get_operand, xtensa_operand_kind): Delete. (xtensa_operand_inout): Add error handling and special-case for "sout" operands. (xtensa_operand_get_field, xtensa_operand_set_field): Rewritten to operate on one slot of an instruction. Added error handling. (xtensa_operand_encode): Handle default operands with no encoding functions. Check for success by comparing against decoded value. Add error handling. (xtensa_operand_decode): Handle default operands. Return decoded value through argument pointer. Add error handling. (xtensa_operand_is_register, xtensa_operand_regfile, xtensa_operand_num_regs, xtensa_operand_is_known_reg): New. (xtensa_operand_isPCRelative): Rename to ... (xtensa_operand_is_PCrelative): ... this. Add error handling. (xtensa_operand_do_reloc, xtensa_operand_undo_reloc): Return value through argument pointer. Add error handling. (xtensa_stateOperand_state, xtensa_stateOperand_inout, xtensa_interfaceOperand_interface, xtensa_regfile_lookup, xtensa_regfile_lookup_shortname, xtensa_regfile_name, xtensa_regfile_shortname, xtensa_regfile_view_parent, xtensa_regfile_num_bits, xtensa_regfile_num_entries, xtensa_state_lookup, xtensa_state_name, xtensa_state_num_bits, xtensa_state_is_exported, xtensa_sysreg_lookup, xtensa_sysreg_lookup_name, xtensa_sysreg_name, xtensa_sysreg_number, xtensa_sysreg_is_user, xtensa_interface_lookup, xtensa_interface_name, xtensa_interface_num_bits, xtensa_interface_inout, xtensa_interface_has_side_effect, xtensa_funcUnit_lookup, xtensa_funcUnit_name, xtensa_funcUnit_num_copies): New. * xtensa-modules.c: Rewrite to use new data structures. * reloc.c (BFD_RELOC_XTENSA_DIFF8, BFD_RELOC_XTENSA_DIFF16, BFD_RELOC_XTENSA_DIFF32, BFD_RELOC_XTENSA_SLOT0_OP, BFD_RELOC_XTENSA_SLOT1_OP, BFD_RELOC_XTENSA_SLOT2_OP, BFD_RELOC_XTENSA_SLOT3_OP, BFD_RELOC_XTENSA_SLOT4_OP, BFD_RELOC_XTENSA_SLOT5_OP, BFD_RELOC_XTENSA_SLOT6_OP, BFD_RELOC_XTENSA_SLOT7_OP, BFD_RELOC_XTENSA_SLOT8_OP, BFD_RELOC_XTENSA_SLOT9_OP, BFD_RELOC_XTENSA_SLOT10_OP, BFD_RELOC_XTENSA_SLOT11_OP, BFD_RELOC_XTENSA_SLOT12_OP, BFD_RELOC_XTENSA_SLOT13_OP, BFD_RELOC_XTENSA_SLOT14_OP, BFD_RELOC_XTENSA_SLOT0_ALT, BFD_RELOC_XTENSA_SLOT1_ALT, BFD_RELOC_XTENSA_SLOT2_ALT, BFD_RELOC_XTENSA_SLOT3_ALT, BFD_RELOC_XTENSA_SLOT4_ALT, BFD_RELOC_XTENSA_SLOT5_ALT, BFD_RELOC_XTENSA_SLOT6_ALT, BFD_RELOC_XTENSA_SLOT7_ALT, BFD_RELOC_XTENSA_SLOT8_ALT, BFD_RELOC_XTENSA_SLOT9_ALT, BFD_RELOC_XTENSA_SLOT10_ALT, BFD_RELOC_XTENSA_SLOT11_ALT, BFD_RELOC_XTENSA_SLOT12_ALT, BFD_RELOC_XTENSA_SLOT13_ALT, BFD_RELOC_XTENSA_SLOT14_ALT): Add new relocations. * Makefile.am (xtensa-isa.lo, xtensa-modules.lo): Update dependencies. * Makefile.in: Regenerate. * bfd-in2.h: Likewise. * libbfd.h: Likewise. gas ChangeLog * config/tc-xtensa.c (absolute_literals_supported): New global flag. (UNREACHABLE_MAX_WIDTH): Define. (XTENSA_FETCH_WIDTH): Delete. (cur_vinsn, xtensa_fetch_width, xt_saved_debug_type, past_xtensa_end, prefer_const16, prefer_l32r): New global variables. (LIT4_SECTION_NAME): Define. (lit4_state struct): Add lit4_seg_name and lit4_seg fields. (XTENSA_PROP_*, GET_XTENSA_PROP_*, SET_XTENSA_PROP_*): Define. (frag_flags struct): New. (xtensa_block_info struct): Move from tc-xtensa.h. Add flags field. (subseg_map struct): Add cur_total_freq and cur_target_freq fields. (bitfield, bit_is_set, set_bit, clear_bit): Define. (MAX_FORMATS): Define. (op_placement_info struct, op_placement_table): New. (O_pltrel, O_hi16, O_lo16): Define. (directiveE enum): Rename directive_generics to directive_transform. Delete directive_relax. Add directive_schedule, directive_absolute_literals, and directive_last_directive. (directive_info): Rename "generics" to "transform". Delete "relax". Add "schedule" and "absolute-literals". (directive_state): Adjust entries to match changes in directive_info. (xtensa_relax_statesE, RELAX_IMMED_MAXSTEPS): Move to tc-xtensa.h. (xtensa_const16_opcode, xtensa_movi_opcode, xtensa_movi_n_opcode, xtensa_l32r_opcode, xtensa_nop_opcode, xtensa_rsr_lcount_opcode): New. (xtensa_j_opcode, xtensa_rsr_opcode): Delete. (align_only_targets, software_a0_b_retw_interlock, software_avoid_b_j_loop_end, maybe_has_b_j_loop_end, software_avoid_short_loop, software_avoid_close_loop_end, software_avoid_all_short_loops, specific_opcode): Delete. (warn_unaligned_branch_targets): New. (workaround_a0_b_retw, workaround_b_j_loop_end, workaround_short_loop, workaround_close_loop_end, workaround_all_short_loops): Default FALSE. (option_[no_]link_relax, option_[no_]transform, option_[no_]absolute_literals, option_warn_unaligned_targets, option_prefer_l32r, option_prefer_const16, option_target_hardware): New enum values. (option_[no_]align_only_targets, option_literal_section_name, option_text_section_name, option_data_section_name, option_bss_section_name, option_eb, option_el): Delete. (md_longopts): Add entries for: [no-]transform, [no-]absolute-literals, warn-unaligned-targets, prefer-l32r, prefer-const16, [no-]link-relax, and target-hardware. Delete entries for [no-]target-align-only, literal-section-name, text-section-name, data-section-name, and bss-section-name. (md_parse_option): Handle new options and remove old ones. Accept but ignore [no-]density options. Warn for [no-]generics and [no-]relax and treat them as [no-]transform. (md_show_usage): Add new options and remove old ones. (xtensa_setup_hw_workarounds): New. (md_pseudo_table): Change "word" entry to use xtensa_elf_cons. Add "long", "short", "loc" and "frequency" entries. (use_generics): Rename to ... (use_transform): ... this function. Add past_xtensa_end check. (use_longcalls): Add past_xtensa_end check. (code_density_available, can_relax): Delete. (do_align_targets): New. (get_directive): Accept dashes in directive names. Warn about [no-]generics and [no-]relax directives and treat them as [no-]transform. (xtensa_begin_directive): Call md_flush_pending_output only for some directives. Check for directives inside instruction bundles. Warn about deprecated ".begin literal" usage. Warn and ignore [no-]density directives. Handle new directives. Check generating_literals flag for literal_prefix. (xtensa_end_directive): Check for directives inside instruction bundles. Warn and ignore [no-]density directives. Handle new directives. Call xtensa_set_frag_assembly_state. (xtensa_loc_directive_seen, xtensa_dwarf2_directive_loc, xtensa_dwarf2_emit_insn): New. (xtensa_literal_position): Call md_flush_pending_output. Do not check use_literal_section flag. (xtensa_literal_pseudo): Call md_flush_pending_output. Handle absolute literals. Use xtensa_elf_cons to parse the expression. (xtensa_literal_prefix): Do not check use_literal_section. Support ".lit4" sections for absolute literals. Change prefix convention to replace ".text" (or ".t" in a linkonce section). No need to call subseg_set. (xtensa_frequency_pseudo, xtensa_elf_cons, xtensa_elf_suffix): New. (expression_end): Handle closing braces and colons. (PLT_SUFFIX, plt_suffix): Delete. (expression_maybe_register): Use new xtensa-isa.h functions. Use xtensa_elf_suffix instead of checking for plt suffix, and handle O_lo16 and O_hi16 expressions as well. (tokenize_arguments): Handle closing braces and colons. (parse_arguments): Use new xtensa-isa.h functions. Handle "invisible" operands and paired register syntax. (get_invisible_operands): New. (xg_translate_sysreg_op): Handle new Xtensa LX RSR/WSR/XSR syntax. Use new xtensa-isa.h functions. (xtensa_translate_old_userreg_ops, xtensa_translate_zero_immed): New. (xg_translate_idioms): Check if inside bundle. Use use_transform. Handle new Xtensa LX RSR/WSR/XSR syntax. Remove code to widen density instructions. Use xtensa_translate_zero_immed. (operand_is_immed, operand_is_pcrel_label): Delete. (get_relaxable_immed): Use new xtensa-isa.h functions. (get_opcode_from_buf): Add slot parameter. Use new xtensa-isa.h functions. (xtensa_print_insn_table, print_vliw_insn): New. (is_direct_call_opcode): Use new xtensa-isa.h functions. (is_call_opcode, is_loop_opcode, is_conditional_branch_opcode, is_branch_or_jump_opcode): Delete. (is_movi_opcode, decode_reloc, encode_reloc, encode_alt_reloc): New. (opnum_to_reloc, reloc_to_opnum): Delete. (xtensa_insnbuf_set_operand, xtensa_insnbuf_get_operand): Use new xtensa-isa.h functions. Operate on one slot of an instruction. (xtensa_insnbuf_set_immediate_field, is_negatable_branch, xg_get_insn_size): Delete. (xg_get_build_instr_size): Use xg_get_single_size. (xg_is_narrow_insn, xg_is_single_relaxable_insn): Update calls to xg_build_widen_table. Use xg_get_single_size. (xg_get_max_narrow_insn_size): Delete. (xg_get_max_insn_widen_size, xg_get_max_insn_widen_literal_size, xg_is_relaxable_insn): Update calls to xg_build_widen_table. Use xg_get_single_size. (xg_build_to_insn): Record the loc field. Handle OP_OPERAND_HI16U and OP_OPERAND_LOW16U. Check xg_valid_literal_expression. (xg_expand_to_stack, xg_expand_narrow): Update calls to xg_build_widen_table. Use xg_get_single_size. (xg_immeds_fit): Use new xtensa-isa.h functions. Update call to xg_check_operand. (xg_symbolic_immeds_fit): Likewise. Also handle O_lo16 and O_hi16, and treat weak symbols conservatively. (xg_check_operand): Use new xtensa-isa.h functions. (is_dnrange): Delete. (xg_assembly_relax): Inline previous calls to tinsn_copy. (xg_finish_frag): Specify separate relax states for the frag and slot0. (is_branch_jmp_to_next, xg_add_branch_and_loop_targets): Use new xtensa-isa.h functions. (xg_instruction_matches_option_term, xg_instruction_matches_or_options, xg_instruction_matches_options): New. (xg_instruction_matches_rule): Handle O_register expressions. Call xg_instruction_matches_options. (transition_rule_cmp): New. (xg_instruction_match): Update call to xg_build_simplify_table. (xg_build_token_insn): Record loc fields. (xg_simplify_insn): Check is_specific_opcode field and density_supported flag. (xg_expand_assembly_insn): Skip checking code_density_available. Use new xtensa-isa.h functions. Call use_transform instead of can_relax. (xg_assemble_literal): Add error handling for O_big. Call record_alignment. Handle O_pltrel. (xg_valid_literal_expression): New. (xg_assemble_literal_space): Add slot parameter. Remove call to set_expr_symbol_offset. Add call to record_alignment. Update call to xg_finish_frag. (xg_emit_insn): Delete. (xg_emit_insn_to_buf): Add format parameter. Update calls to xg_add_opcode_fix and xtensa_insnbuf_to_chars. (xg_add_opcode_fix): Change opcode parameter to tinsn and add format and slot parameters. Handle new "alternate" relocations for absolute literals and CONST16 instructions. Check for bad uses of O_lo16 and O_hi16. Use new xtensa-isa.h functions. (xg_assemble_tokens): Delete. (is_register_writer): Use new xtensa-isa.h functions. (is_bad_loopend_opcode): Check for xtensa_rsr_lcount_opcode instead of old-style RSR from LCOUNT. (next_frag_opcode): Delete. (next_frag_opcode_is_loop, next_frag_format_size, frag_format_size, update_next_frag_state): New. (update_next_frag_nop_state): Delete. (next_frag_pre_opcode_bytes): Use next_frag_opcode_is_loop. (xtensa_mark_literal_pool_location): Check use_literal_section flag and the state of the absolute-literals directive. Add calls to record_alignment and xtensa_set_frag_assembly_state. Call xtensa_switch_to_non_abs_literal_fragment instead of xtensa_switch_to_literal_fragment. (build_nop): New. (assemble_nop): Use build_nop. Update call to xtensa_insnbuf_to_chars. (get_expanded_loop_offset): Change check for undefined opcode to an assertion. (xtensa_set_frag_assembly_state, relaxable_section, xtensa_find_unmarked_state_frags, xtensa_find_unaligned_branch_targets, xtensa_find_unaligned_loops, xg_apply_tentative_value): New. (md_begin): Update call to xtensa_isa_init. Initialize linkrelax to 1. Set lit4_seg_name. Call xg_init_vinsn. Initialize new global opcodes. Call init_op_placement_info_table and xtensa_set_frag_assembly_state. (xtensa_init_fix_data): New. (xtensa_frob_label): Reset label symbol to the current frag. Check do_align_targets and generating_literals flag. Propagate frequency info to new alignment frag. Call xtensa_set_frag_assembly_state. (xtensa_unrecognized_line): New. (xtensa_flush_pending_output): Check if inside a bundle. Add a call to xtensa_set_frag_assembly_state. (error_reset_cur_vinsn): New. (md_assemble): Remove check for literal frag. Remove call to istack_init. Call use_transform instead of use_generics. Parse explicit instruction format specifiers. Move code for a0_b_retw_interlock workaround to xg_assemble_vliw_tokens. Call error_reset_cur_vinsn on errors. Add call to get_invisible_operands. Add dwarf2_where call. Remote automatic alignment for ENTRY instructions. Move call to xtensa_clear_insn_labels to the end. Rearrange to handle bundles. (xtensa_cons_fix_new): Delete. (xtensa_handle_align): New. (xtensa_frag_init): Call xtensa_set_frag_assembly_state. Remove assignment to is_no_density field. (md_pcrel_from): Use new xtensa-isa.h functions. Use decode_reloc instead of reloc_to_opnum. Handle "alternate" relocations. (xtensa_force_relocation, xtensa_check_inside_bundle, xtensa_elf_section_change_hook): New. (xtensa_symbol_new_hook): Delete. (xtensa_fix_adjustable): Check for difference of symbols with an offset. Check for external and weak symbols. (md_apply_fix3): Remove cases for XTENSA_OP{0,1,2} relocs. (md_estimate_size_before_relax): Return expansion for the first slot. (tc_gen_reloc): Handle difference of symbols by producing XTENSA_DIFF{8,16,32} relocs and by writing the value of the difference into the output. Handle new XTENSA_SLOT*_OP relocs by storing the tentative values into the output when linkrelax is set. (XTENSA_PROP_SEC_NAME): Define. (xtensa_post_relax_hook): Call xtensa_find_unmarked_state_frags. Create literal tables only if using literal sections. Create new property tables instead of old instruction tables. Check for unaligned branch targets and loops. (finish_vinsn, find_vinsn_conflicts, check_t1_t2_reads_and_writes, new_resource_table, clear_resource_table, resize_resource_table, resources_available, reserve_resources, release_resources, opcode_funcUnit_use_unit, opcode_funcUnit_use_stage, resources_conflict, xg_find_narrowest_format, relaxation_requirements, bundle_single_op, emit_single_op, xg_assemble_vliw_tokens): New. (xtensa_end): Call xtensa_flush_pending_output. Set past_xtensa_end flag. Update checks for workaround options. Call xtensa_mark_narrow_branches and xtensa_mark_zcl_first_insns. (xtensa_cleanup_align_frags): Add special case for branch targets. Check for and mark unreachable frags. (xtensa_fix_target_frags): Remove use of align_only_targets flag. Use RELAX_LOOP_END_BYTES in special case for negatable branch at the end of a zero-overhead loop body. (frag_can_negate_branch): Handle instructions with multiple slots. Use new xtensa-isa.h functions (xtensa_mark_narrow_branches, is_narrow_branch_guaranteed_in_range, xtensa_mark_zcl_first_insns): New. (xtensa_fix_a0_b_retw_frags, xtensa_fix_b_j_loop_end_frags): Error if transformations are disabled. (next_instrs_are_b_retw): Use new xtensa-isa.h functions. Handle multislot instructions. (xtensa_fix_close_loop_end_frags, xtensa_fix_short_loop_frags): Likewise. Also error if transformations are disabled. (unrelaxed_frag_max_size): New. (unrelaxed_frag_min_insn_count, unrelax_frag_has_b_j): Use new xtensa-isa.h functions. (xtensa_sanity_check, is_empty_loop, is_local_forward_loop): Use xtensa_opcode_is_loop instead of is_loop_opcode. (get_text_align_power): Replace as_fatal with assertion. (get_text_align_fill_size): Iterate instead of using modulus when use_nops is false. (get_noop_aligned_address): Assert that this is for a machine-dependent RELAX_ALIGN_NEXT_OPCODE frag. Use next_frag_opcode_is_loop, xg_get_single_size, and frag_format_size. (get_widen_aligned_address): Rename to ... (get_aligned_diff): ... this function. Add max_diff parameter. Remove handling of rs_align/rs_align_code frags. Use next_frag_format_size, get_text_align_power, get_text_align_fill_size, next_frag_opcode_is_loop, and xg_get_single_size. Compute max_diff and pass it back to caller. (xtensa_relax_frag): Use relax_frag_loop_align. Add code for new RELAX_SLOTS, RELAX_MAYBE_UNREACHABLE, RELAX_MAYBE_DESIRE_ALIGN, RELAX_FILL_NOP, and RELAX_UNREACHABLE frag types. Check relax_seen. (relax_frag_text_align): Rename to ... (relax_frag_loop_align): ... this function. Assume loops can only be in the first slot of an instruction. (relax_frag_add_nop): Use assemble_nop instead of constructing an OR instruction. Remove call to frag_wane. (relax_frag_narrow): Rename to ... (relax_frag_for_align): ... this function. Extend to handle RELAX_FILL_NOP and RELAX_UNREACHABLE, as well as RELAX_SLOTS with RELAX_NARROW for the first slot. (find_address_of_next_align_frag, bytes_to_stretch): New. (future_alignment_required): Use find_address_of_next_align_frag and bytes_to_stretch. Look ahead to subsequent frags to make smarter alignment decisions. (relax_frag_immed): Add format, slot, and estimate_only parameters. Check if transformations are enabled for b_j_loop_end workaround. Use new xtensa-isa.h functions and handle multislot instructions. Update call to xg_assembly_relax. (md_convert_frag): Handle new RELAX_SLOTS, RELAX_UNREACHABLE, RELAX_MAYBE_UNREACHABLE, RELAX_MAYBE_DESIRE_ALIGN, and RELAX_FILL_NOP frag types. (convert_frag_narrow): Add segP, format and slot parameters. Call convert_frag_immed for branch instructions. Adjust calls to tinsn_from_chars, tinsn_immed_from_frag, and xg_emit_insn_to_buf. Use xg_get_single_size and xg_get_single_format. (convert_frag_fill_nop): New. (convert_frag_immed): Add format and slot parameters. Handle multislot instructions and use new xtensa-isa.h functions. Update calls to tinsn_immed_from_frag and xg_assembly_relax. Check if transformations enabled for b_j_loop_end workaround. Use build_nop instead of assemble_nop. Check is_specific_opcode flag. Check for unreachable frags. Use xg_get_single_size. Handle O_pltrel. (fix_new_exp_in_seg): Remove check for old plt flag. (convert_frag_immed_finish_loop): Update calls to tinsn_from_chars and xtensa_insnbuf_to_chars. Call tinsn_immed_from_frag. Change check for loop opcode to an assertion. Mark all frags up to the end of the loop as not transformable. (get_last_insn_flags, set_last_insn_flags): Use get_subseg_info. (get_subseg_info): New. (xtensa_move_literals): Call xtensa_set_frag_assembly_state. Add null check for dest_seg. (xtensa_switch_to_literal_fragment): Rewrite to handle absolute literals and use xtensa_switch_to_non_abs_literal_fragment otherwise. (xtensa_switch_to_non_abs_literal_fragment): New. (cache_literal_section): Add is_code parameter and pass it through to retrieve_literal_seg. (retrieve_literal_seg): Add is_code parameter and use it to set the flags on the literal section. Handle case where head parameter is 0. (get_frag_is_no_transform, set_frag_is_specific_opcode, set_frag_is_no_transform): New. (xtensa_create_property_segments): Add end_property_function parameter and pass it through to add_xt_block_frags. Call bfd_get_section_flags and skip SEC_DEBUGGING and !SEC_ALLOC sections. (xtensa_create_xproperty_segments, section_has_xproperty): New. (add_xt_block_frags): Add end_property_function parameter and call it if it is non-zero. Call xtensa_frag_flags_init. (xtensa_frag_flags_is_empty, xtensa_frag_flags_init, get_frag_property_flags, frag_flags_to_number, xtensa_frag_flags_combinable, xt_block_aligned_size, xtensa_xt_block_combine, add_xt_prop_frags, init_op_placement_info_table, opcode_fits_format_slot, xg_get_single_size, xg_get_single_format): New. (istack_push): Inline call to tinsn_copy. (tinsn_copy): Delete. (tinsn_has_invalid_symbolic_operands): Handle O_hi16 and O_lo16 and CONST16 opcodes. Handle O_big, O_illegal, and O_absent. (tinsn_has_complex_operands): Handle O_hi16 and O_lo16. (tinsn_to_insnbuf): Use xg_get_single_format and new xtensa-isa.h functions. Handle invisible operands. (tinsn_to_slotbuf): New. (tinsn_check_arguments): Use new xtensa-isa.h functions. (tinsn_from_chars): Add slot parameter. Rewrite using xg_init_vinsn, vinsn_from_chars, and xg_free_vinsn. (tinsn_from_insnbuf): New. (tinsn_immed_from_frag): Add slot parameter and handle multislot instructions. Handle symbol differences. (get_num_stack_text_bytes): Use xg_get_single_size. (xg_init_vinsn, xg_clear_vinsn, vinsn_has_specific_opcodes, xg_free_vinsn, vinsn_to_insnbuf, vinsn_from_chars, expr_is_register, get_expr_register, set_expr_symbol_offset_diff): New. * config/tc-xtensa.h (MAX_SLOTS): Define. (xtensa_relax_statesE): Move from tc-xtensa.c. Add RELAX_CHECK_ALIGN_NEXT_OPCODE, RELAX_MAYBE_DESIRE_ALIGN, RELAX_SLOTS, RELAX_FILL_NOP, RELAX_UNREACHABLE, RELAX_MAYBE_UNREACHABLE, and RELAX_NONE types. (RELAX_IMMED_MAXSTEPS): Move from tc-xtensa.c. (xtensa_frag_type struct): Add is_assembly_state_set, use_absolute_literals, relax_seen, is_unreachable, is_specific_opcode, is_align, is_text_align, alignment, and is_first_loop_insn fields. Replace is_generics and is_relax fields by is_no_transform field. Delete is_text and is_longcalls fields. Change text_expansion and literal_expansion to arrays of MAX_SLOTS entries. Add arrays of per-slot information: literal_frags, slot_subtypes, slot_symbols, slot_sub_symbols, and slot_offsets. Add fr_prev field. (xtensa_fix_data struct): New. (xtensa_symfield_type struct): Delete plt field. (xtensa_block_info struct): Move definition to tc-xtensa.h. Add forward declaration here. (xt_section_type enum): Delete xt_insn_sec. Add xt_prop_sec. (XTENSA_SECTION_RENAME): Undefine. (TC_FIX_TYPE, TC_INIT_FIX_DATA, TC_FORCE_RELOCATION, NO_PSEUDO_DOT, tc_unrecognized_line, md_do_align, md_elf_section_change_hook, HANDLE_ALIGN, TC_LINKRELAX_FIXUP, SUB_SEGMENT_ALIGN): Define. (TC_CONS_FIX_NEW, tc_symbol_new_hook): Delete. (unit_num_copies_func, opcode_num_units_func, opcode_funcUnit_use_unit_func, opcode_funcUnit_use_stage_func): New. (resource_table struct): New. * config/xtensa-istack.h (MAX_INSN_ARGS): Increase from 6 to 10. (TInsn struct): Add keep_wide, loc, fixup, record_fix, subtype, literal_space, symbol, sub_symbol, offset, and literal_frag fields. (tinsn_copy): Delete prototype. (vliw_insn struct): New. * config/xtensa-relax.c (insn_pattern_struct): Add options field. (widen_spec_list): Add option conditions for density and boolean instructions. Add expansions using CONST16 and conditions for using CONST16 vs. L32R. Use new Xtensa LX RSR/WSR syntax. Add entries for predicted branches. (simplify_spec_list): Add option conditions for density instructions. Add entry for NOP instruction. (append_transition): Add cmp function pointer parameter and use it to insert the new entry in order. (operand_function_LOW16U, operand_function_HI16U): New. (xg_has_userdef_op_fn, xg_apply_userdef_op_fn): Handle OP_OPERAND_LOW16U and OP_OPERAND_HI16U. (enter_opname, split_string): Use xstrdup instead of strdup. (init_insn_pattern): Initialize new options field. (clear_req_or_option_list, clear_req_option_list, clone_req_or_option_list, clone_req_option_list, parse_option_cond): New. (parse_insn_pattern): Parse option conditions. (transition_applies): New. (build_transition): Use new xtensa-isa.h functions. Fix incorrectly swapped last arguments in calls to append_constant_value_condition. Call clone_req_option_list. Add warning about invalid opcode. Handle LOW16U and HI16U function names. (build_transition_table): Add cmp parameter and use it in calls to append_transition. Use new xtensa-isa.h functions. Check transition_applies before adding entries. (xg_build_widen_table, xg_build_simplify_table): Add cmp parameter and pass it through to build_transition_table. * config/xtensa-relax.h (ReqOrOptionList, ReqOrOption, ReqOptionList, ReqOption, transition_cmp_fn): New types. (OpType enum): Add OP_OPERAND_LOW16U and OP_OPERAND_HI16U. (transition_rule struct): Add options field. * doc/as.texinfo (Overview): Update Xtensa options. * doc/c-xtensa.texi (Xtensa Options): Delete --[no-]density, --[no-]relax, and --[no-]generics options. Update descriptions of --text-section-literals and --[no-]longcalls. Add --[no-]absolute-literals and --[no-]transform. (Xtensa Syntax): Add description of syntax for FLIX instructions. Remove use of "generic" and "specific" terminology for opcodes. (Xtensa Registers): Generalize the syntax description to include user-defined register files. (Xtensa Automatic Alignment): Update. (Xtensa Branch Relaxation): Mention limitation of unconditional jumps. (Xtensa Call Relaxation): Linker can now remove most of the overhead. (Xtensa Directives): Remove confusing rules about precedence. (Density Directive, Relax Directive): Delete. (Schedule Directive): New. (Generics Directive): Rename to ... (Transform Directive): ... this node. (Literal Directive): Update for absolute literals. Missing literal_position directive is now an error. (Literal Position Directive): Update for absolute literals. (Freeregs Directive): Delete. (Absolute Literals Directive): New. (Frame Directive): Minor editing. * Makefile.am (DEPTC_xtensa_elf, DEPOBJ_xtensa_elf, DEP_xtensa_elf): Update dependencies. * Makefile.in: Regenerate. gas/testsuite ChangeLog * gas/xtensa/all.exp: Adjust expected error message for j_too_far. Change entry_align test to expect an error. * gas/xtensa/entry_misalign2.s: Use no-transform instead of no-generics directives. include ChangeLog * xtensa-config.h (XSHAL_USE_ABSOLUTE_LITERALS, XCHAL_HAVE_PREDICTED_BRANCHES, XCHAL_INST_FETCH_WIDTH): New. (XCHAL_EXTRA_SA_SIZE, XCHAL_EXTRA_SA_ALIGN): Delete. * xtensa-isa-internal.h (ISA_INTERFACE_VERSION): Delete. (config_sturct struct): Delete. (XTENSA_OPERAND_IS_REGISTER, XTENSA_OPERAND_IS_PCRELATIVE, XTENSA_OPERAND_IS_INVISIBLE, XTENSA_OPERAND_IS_UNKNOWN, XTENSA_OPCODE_IS_BRANCH, XTENSA_OPCODE_IS_JUMP, XTENSA_OPCODE_IS_LOOP, XTENSA_OPCODE_IS_CALL, XTENSA_STATE_IS_EXPORTED, XTENSA_INTERFACE_HAS_SIDE_EFFECT): Define. (xtensa_format_encode_fn, xtensa_get_slot_fn, xtensa_set_slot_fn): New. (xtensa_insn_decode_fn): Rename to ... (xtensa_opcode_decode_fn): ... this. (xtensa_immed_decode_fn, xtensa_immed_encode_fn, xtensa_do_reloc_fn, xtensa_undo_reloc_fn): Update. (xtensa_encoding_template_fn): Delete. (xtensa_opcode_encode_fn, xtensa_format_decode_fn, xtensa_length_decode_fn): New. (xtensa_format_internal, xtensa_slot_internal): New types. (xtensa_operand_internal): Delete operand_kind, inout, isPCRelative, get_field, and set_field fields. Add name, field_id, regfile, num_regs, and flags fields. (xtensa_arg_internal): New type. (xtensa_iclass_internal): Change operands field to array of xtensa_arg_internal. Add num_stateOperands, stateOperands, num_interfaceOperands, and interfaceOperands fields. (xtensa_opcode_internal): Delete length, template, and iclass fields. Add iclass_id, flags, encode_fns, num_funcUnit_uses, and funcUnit_uses. (opname_lookup_entry): Delete. (xtensa_regfile_internal, xtensa_interface_internal, xtensa_funcUnit_internal, xtensa_state_internal, xtensa_sysreg_internal, xtensa_lookup_entry): New. (xtensa_isa_internal): Replace opcode_table field with opcodes field. Change type of opname_lookup_table. Delete num_modules, module_opcode_base, module_decode_fn, config, and has_density fields. Add num_formats, formats, format_decode_fn, length_decode_fn, num_slots, slots, num_fields, num_operands, operands, num_iclasses, iclasses, num_regfiles, regfiles, num_states, states, state_lookup_table, num_sysregs, sysregs, sysreg_lookup_table, max_sysreg_num, sysreg_table, num_interfaces, interfaces, interface_lookup_table, num_funcUnits, funcUnits and funcUnit_lookup_table fields. (xtensa_isa_module, xtensa_isa_modules): Delete. (xtensa_isa_name_compare): New prototype. (xtisa_errno, xtisa_error_msg): New. * xtensa-isa.h (XTENSA_ISA_VERSION): Define. (xtensa_isa): Change type. (xtensa_operand): Delete. (xtensa_format, xtensa_regfile, xtensa_state, xtensa_sysreg, xtensa_interface, xtensa_funcUnit, xtensa_isa_status, xtensa_funcUnit_use): New types. (libisa_module_specifier): Delete. (xtensa_isa_errno, xtensa_isa_error_msg): New prototypes. (xtensa_insnbuf_free, xtensa_insnbuf_to_chars, xtensa_insnbuf_from_chars): Update prototypes. (xtensa_load_isa, xtensa_extend_isa, xtensa_default_isa, xtensa_insn_maxlength, xtensa_num_opcodes, xtensa_decode_insn, xtensa_encode_insn, xtensa_insn_length, xtensa_insn_length_from_first_byte, xtensa_num_operands, xtensa_operand_kind, xtensa_encode_result, xtensa_operand_isPCRelative): Delete. (xtensa_isa_init, xtensa_operand_inout, xtensa_operand_get_field, xtensa_operand_set_field, xtensa_operand_encode, xtensa_operand_decode, xtensa_operand_do_reloc, xtensa_operand_undo_reloc): Update prototypes. (xtensa_isa_maxlength, xtensa_isa_length_from_chars, xtensa_isa_num_pipe_stages, xtensa_isa_num_formats, xtensa_isa_num_opcodes, xtensa_isa_num_regfiles, xtensa_isa_num_states, xtensa_isa_num_sysregs, xtensa_isa_num_interfaces, xtensa_isa_num_funcUnits, xtensa_format_name, xtensa_format_lookup, xtensa_format_decode, xtensa_format_encode, xtensa_format_length, xtensa_format_num_slots, xtensa_format_slot_nop_opcode, xtensa_format_get_slot, xtensa_format_set_slot, xtensa_opcode_decode, xtensa_opcode_encode, xtensa_opcode_is_branch, xtensa_opcode_is_jump, xtensa_opcode_is_loop, xtensa_opcode_is_call, xtensa_opcode_num_operands, xtensa_opcode_num_stateOperands, xtensa_opcode_num_interfaceOperands, xtensa_opcode_num_funcUnit_uses, xtensa_opcode_funcUnit_use, xtensa_operand_name, xtensa_operand_is_visible, xtensa_operand_is_register, xtensa_operand_regfile, xtensa_operand_num_regs, xtensa_operand_is_known_reg, xtensa_operand_is_PCrelative, xtensa_stateOperand_state, xtensa_stateOperand_inout, xtensa_interfaceOperand_interface, xtensa_regfile_lookup, xtensa_regfile_lookup_shortname, xtensa_regfile_name, xtensa_regfile_shortname, xtensa_regfile_view_parent, xtensa_regfile_num_bits, xtensa_regfile_num_entries, xtensa_state_lookup, xtensa_state_name, xtensa_state_num_bits, xtensa_state_is_exported, xtensa_sysreg_lookup, xtensa_sysreg_lookup_name, xtensa_sysreg_name, xtensa_sysreg_number, xtensa_sysreg_is_user, xtensa_interface_lookup, xtensa_interface_name, xtensa_interface_num_bits, xtensa_interface_inout, xtensa_interface_has_side_effect, xtensa_funcUnit_lookup, xtensa_funcUnit_name, xtensa_funcUnit_num_copies): New prototypes. * elf/xtensa.h (R_XTENSA_DIFF8, R_XTENSA_DIFF16, R_XTENSA_DIFF32, R_XTENSA_SLOT*_OP, R_XTENSA_SLOT*_ALT): New relocations. (XTENSA_PROP_SEC_NAME): Define. (property_table_entry): Add flags field. (XTENSA_PROP_*, GET_XTENSA_PROP_*, SET_XTENSA_PROP_*): Define. ld ChangeLog * ld.texinfo (Xtensa): Describe new linker relaxation to optimize assembler-generated longcall sequences. Describe new --size-opt option. * emulparams/elf32xtensa.sh (OTHER_SECTIONS): Add .xt.prop section. * emultempl/xtensaelf.em (remove_section, replace_insn_sec_with_prop_sec, replace_instruction_table_sections, elf_xtensa_after_open): New. (OPTION_OPT_SIZEOPT, OPTION_LITERAL_MOVEMENT, OPTION_NO_LITERAL_MOVEMENT): Define. (elf32xtensa_size_opt, elf32xtensa_no_literal_movement): New globals. (PARSE_AND_LIST_LONGOPTS): Add size-opt and [no-]literal-movement. (PARSE_AND_LIST_OPTIONS): Add --size-opt. (PARSE_AND_LIST_ARGS_CASES): Handle OPTION_OPT_SIZEOPT, OPTION_LITERAL_MOVEMENT, and OPTION_NO_LITERAL_MOVEMENT. (LDEMUL_AFTER_OPEN): Set to elf_xtensa_after_open. * scripttempl/elfxtensa.sc: Update with changes from elf.sc. * Makefile.am (eelf32xtensa.c): Update dependencies. * Makefile.in: Regenerate. ld/testsuite ChangeLog * ld-xtensa/lcall1.s: Use .literal directive. * ld-xtensa/lcall2.s: Align function entry. * ld-xtensa/coalesce2.s: Likewise. opcodes ChangeLog * xtensa-dis.c (state_names): Delete. (fetch_data): Use xtensa_isa_maxlength. (print_xtensa_operand): Replace operand parameter with opcode/operand pair. Remove print_sr_name parameter. Use new xtensa-isa.h functions. (print_insn_xtensa): Use new xtensa-isa.h functions. Handle multislot instruction bundles. Use xmalloc instead of malloc. --- include/xtensa-isa.h | 822 ++++++++++++++++++++++++++++++++++++++++++--------- 1 file changed, 688 insertions(+), 134 deletions(-) (limited to 'include/xtensa-isa.h') diff --git a/include/xtensa-isa.h b/include/xtensa-isa.h index 54f750c9a..2dc11b924 100644 --- a/include/xtensa-isa.h +++ b/include/xtensa-isa.h @@ -1,5 +1,5 @@ /* Interface definition for configurable Xtensa ISA support. - Copyright 2003 Free Software Foundation, Inc. + Copyright 2003, 2004 Free Software Foundation, Inc. This file is part of BFD, the Binary File Descriptor library. @@ -20,209 +20,763 @@ #ifndef XTENSA_LIBISA_H #define XTENSA_LIBISA_H -/* Use the statically-linked version for the GNU tools. */ -#define STATIC_LIBISA 1 - #ifdef __cplusplus extern "C" { #endif +/* Use the statically-linked version for the GNU tools. */ +#define STATIC_LIBISA 1 + +/* Version number: This is intended to help support code that works with + versions of this library from multiple Xtensa releases. */ + +#define XTENSA_ISA_VERSION 7000 + #ifndef uint32 #define uint32 unsigned int #endif -/* This file defines the interface to the Xtensa ISA library. This library - contains most of the ISA-specific information for a particular Xtensa - processor. For example, the set of valid instructions, their opcode - encodings and operand fields are all included here. To support Xtensa's - configurability and user-defined instruction extensions (i.e., TIE), the - library is initialized by loading one or more dynamic libraries; only a - small set of interface code is present in the statically-linked portion - of the library. +/* This file defines the interface to the Xtensa ISA library. This + library contains most of the ISA-specific information for a + particular Xtensa processor. For example, the set of valid + instructions, their opcode encodings and operand fields are all + included here. - This interface basically defines four abstract data types. + This interface basically defines a number of abstract data types. . an instruction buffer - for holding the raw instruction bits . ISA info - information about the ISA as a whole - . opcode info - information about individual instructions - . operand info - information about specific instruction operands - - It would be nice to implement these as classes in C++, but the library is - implemented in C to match the expectations of the GNU tools. - Instead, the interface defines a set of functions to access each data - type. With the exception of the instruction buffer, the internal - representations of the data structures are hidden. All accesses must be - made through the functions defined here. */ + . instruction formats - instruction size and slot structure + . opcodes - information about individual instructions + . operands - information about register and immediate instruction operands + . stateOperands - information about processor state instruction operands + . interfaceOperands - information about interface instruction operands + . register files - register file information + . processor states - internal processor state information + . system registers - "special registers" and "user registers" + . interfaces - TIE interfaces that are external to the processor + . functional units - TIE shared functions + + The interface defines a set of functions to access each data type. + With the exception of the instruction buffer, the internal + representations of the data structures are hidden. All accesses must + be made through the functions defined here. */ + +typedef struct xtensa_isa_opaque { int unused; } *xtensa_isa; + + +/* Opcodes, formats, regfiles, states, sysregs, ctypes, and protos are + represented here using sequential integers beginning with 0. The + specific values are only fixed for a particular instantiation of an + xtensa_isa structure, so these values should only be used + internally. */ -typedef void* xtensa_isa; -typedef void* xtensa_operand; - - -/* Opcodes are represented here using sequential integers beginning with 0. - The specific value used for a particular opcode is only fixed for a - particular instantiation of an xtensa_isa structure, so these values - should only be used internally. */ typedef int xtensa_opcode; - -/* Define a unique value for undefined opcodes ("static const int" doesn't - seem to work for this because EGCS 1.0.3 on i686-Linux without -O won't - allow it to be used as an initializer). */ -#define XTENSA_UNDEFINED -1 +typedef int xtensa_format; +typedef int xtensa_regfile; +typedef int xtensa_state; +typedef int xtensa_sysreg; +typedef int xtensa_interface; +typedef int xtensa_funcUnit; -typedef int libisa_module_specifier; +/* Define a unique value for undefined items. */ -extern xtensa_isa xtensa_isa_init (void); +#define XTENSA_UNDEFINED -1 +/* Overview of using this interface to decode/encode instructions: + + Each Xtensa instruction is associated with a particular instruction + format, where the format defines a fixed number of slots for + operations. The formats for the core Xtensa ISA have only one slot, + but FLIX instructions may have multiple slots. Within each slot, + there is a single opcode and some number of associated operands. + + The encoding and decoding functions operate on instruction buffers, + not on the raw bytes of the instructions. The same instruction + buffer data structure is used for both entire instructions and + individual slots in those instructions -- the contents of a slot need + to be extracted from or inserted into the buffer for the instruction + as a whole. + + Decoding an instruction involves first finding the format, which + identifies the number of slots, and then decoding each slot + separately. A slot is decoded by finding the opcode and then using + the opcode to determine how many operands there are. For example: + + xtensa_insnbuf_from_chars + xtensa_format_decode + for each slot { + xtensa_format_get_slot + xtensa_opcode_decode + for each operand { + xtensa_operand_get_field + xtensa_operand_decode + } + } + + Encoding an instruction is roughly the same procedure in reverse: + + xtensa_format_encode + for each slot { + xtensa_opcode_encode + for each operand { + xtensa_operand_encode + xtensa_operand_set_field + } + xtensa_format_set_slot + } + xtensa_insnbuf_to_chars +*/ + + +/* Error handling. */ + +/* Error codes. The code for the most recent error condition can be + retrieved with the "errno" function. For any result other than + xtensa_isa_ok, an error message containing additional information + about the problem can be retrieved using the "error_msg" function. + The error messages are stored in an internal buffer, which should not + should be freed and may be overwritten by subsequent operations. */ + +typedef enum xtensa_isa_status_enum +{ + xtensa_isa_ok = 0, + xtensa_isa_bad_format, + xtensa_isa_bad_slot, + xtensa_isa_bad_opcode, + xtensa_isa_bad_operand, + xtensa_isa_bad_field, + xtensa_isa_bad_iclass, + xtensa_isa_bad_regfile, + xtensa_isa_bad_sysreg, + xtensa_isa_bad_state, + xtensa_isa_bad_interface, + xtensa_isa_bad_funcUnit, + xtensa_isa_wrong_slot, + xtensa_isa_no_field, + xtensa_isa_out_of_memory, + xtensa_isa_buffer_overflow, + xtensa_isa_internal_error, + xtensa_isa_bad_value +} xtensa_isa_status; + +extern xtensa_isa_status +xtensa_isa_errno (xtensa_isa isa); + +extern char * +xtensa_isa_error_msg (xtensa_isa isa); + + /* Instruction buffers. */ typedef uint32 xtensa_insnbuf_word; typedef xtensa_insnbuf_word *xtensa_insnbuf; -/* Get the size in words of the xtensa_insnbuf array. */ -extern int xtensa_insnbuf_size (xtensa_isa); -/* Allocate (with malloc) an xtensa_insnbuf of the right size. */ -extern xtensa_insnbuf xtensa_insnbuf_alloc (xtensa_isa); +/* Get the size in "insnbuf_words" of the xtensa_insnbuf array. */ -/* Release (with free) an xtensa_insnbuf of the right size. */ -extern void xtensa_insnbuf_free (xtensa_insnbuf); +extern int +xtensa_insnbuf_size (xtensa_isa isa); -/* Inward and outward conversion from memory images (byte streams) to our - internal instruction representation. */ -extern void xtensa_insnbuf_to_chars (xtensa_isa, const xtensa_insnbuf, - char *); -extern void xtensa_insnbuf_from_chars (xtensa_isa, xtensa_insnbuf, - const char *); +/* Allocate an xtensa_insnbuf of the right size. */ +extern xtensa_insnbuf +xtensa_insnbuf_alloc (xtensa_isa isa); -/* ISA information. */ -/* Load the ISA information from a shared library. If successful, this returns - a value which identifies the ISA for use in subsequent calls to the ISA - library; otherwise, it returns NULL. Multiple ISAs can be loaded to support - heterogeneous multiprocessor systems. */ -extern xtensa_isa xtensa_load_isa (libisa_module_specifier); +/* Release an xtensa_insnbuf. */ + +extern void +xtensa_insnbuf_free (xtensa_isa isa, xtensa_insnbuf buf); + -/* Extend an existing set of ISA information by loading an additional shared - library of ISA information. This is primarily intended for loading TIE - extensions. If successful, the return value is non-zero. */ -extern int xtensa_extend_isa (xtensa_isa, libisa_module_specifier); +/* Conversion between raw memory (char arrays) and our internal + instruction representation. This is complicated by the Xtensa ISA's + variable instruction lengths. When converting to chars, the buffer + must contain a valid instruction so we know how many bytes to copy; + thus, the "to_chars" function returns the number of bytes copied or + XTENSA_UNDEFINED on error. The "from_chars" function first reads the + minimal number of bytes required to decode the instruction length and + then proceeds to copy the entire instruction into the buffer; if the + memory does not contain a valid instruction, it copies the maximum + number of bytes required for the longest Xtensa instruction. The + "num_chars" argument may be used to limit the number of bytes that + can be read or written. Otherwise, if "num_chars" is zero, the + functions may read or write past the end of the code. */ -/* The default ISA. This variable is set automatically to the ISA most - recently loaded and is provided as a convenience. An exception is the GNU - opcodes library, where there is a fixed interface that does not allow - passing the ISA as a parameter and the ISA must be taken from this global - variable. (Note: Since this variable is just a convenience, it is not - exported when libisa is built as a DLL, due to the hassle of dealing with - declspecs.) */ -extern xtensa_isa xtensa_default_isa; +extern int +xtensa_insnbuf_to_chars (xtensa_isa isa, const xtensa_insnbuf insn, + char *cp, int num_chars); + +extern void +xtensa_insnbuf_from_chars (xtensa_isa isa, xtensa_insnbuf insn, + const char *cp, int num_chars); + + +/* ISA information. */ + +/* Initialize the ISA information. */ + +extern xtensa_isa +xtensa_isa_init (xtensa_isa_status *errno_p, char **error_msg_p); /* Deallocate an xtensa_isa structure. */ -extern void xtensa_isa_free (xtensa_isa); + +extern void +xtensa_isa_free (xtensa_isa isa); + /* Get the maximum instruction size in bytes. */ -extern int xtensa_insn_maxlength (xtensa_isa); -/* Get the total number of opcodes for this processor. */ -extern int xtensa_num_opcodes (xtensa_isa); +extern int +xtensa_isa_maxlength (xtensa_isa isa); + + +/* Decode the length in bytes of an instruction in raw memory (not an + insnbuf). This function reads only the minimal number of bytes + required to decode the instruction length. Returns + XTENSA_UNDEFINED on error. */ + +extern int +xtensa_isa_length_from_chars (xtensa_isa isa, const char *cp); + + +/* Get the number of stages in the processor's pipeline. The pipeline + stage values returned by other functions in this library will range + from 0 to N-1, where N is the value returned by this function. + Note that the stage numbers used here may not correspond to the + actual processor hardware, e.g., the hardware may have additional + stages before stage 0. Returns XTENSA_UNDEFINED on error. */ + +extern int +xtensa_isa_num_pipe_stages (xtensa_isa isa); + + +/* Get the number of various entities that are defined for this processor. */ + +extern int +xtensa_isa_num_formats (xtensa_isa isa); + +extern int +xtensa_isa_num_opcodes (xtensa_isa isa); + +extern int +xtensa_isa_num_regfiles (xtensa_isa isa); + +extern int +xtensa_isa_num_states (xtensa_isa isa); + +extern int +xtensa_isa_num_sysregs (xtensa_isa isa); + +extern int +xtensa_isa_num_interfaces (xtensa_isa isa); + +extern int +xtensa_isa_num_funcUnits (xtensa_isa isa); + + +/* Instruction formats. */ + +/* Get the name of a format. Returns null on error. */ + +extern const char * +xtensa_format_name (xtensa_isa isa, xtensa_format fmt); + + +/* Given a format name, return the format number. Returns + XTENSA_UNDEFINED if the name is not a valid format. */ + +extern xtensa_format +xtensa_format_lookup (xtensa_isa isa, const char *fmtname); + + +/* Decode the instruction format from a binary instruction buffer. + Returns XTENSA_UNDEFINED if the format is not recognized. */ + +extern xtensa_format +xtensa_format_decode (xtensa_isa isa, const xtensa_insnbuf insn); + + +/* Set the instruction format field(s) in a binary instruction buffer. + All the other fields are set to zero. Returns non-zero on error. */ + +extern int +xtensa_format_encode (xtensa_isa isa, xtensa_format fmt, xtensa_insnbuf insn); + + +/* Find the length (in bytes) of an instruction. Returns + XTENSA_UNDEFINED on error. */ + +extern int +xtensa_format_length (xtensa_isa isa, xtensa_format fmt); + + +/* Get the number of slots in an instruction. Returns XTENSA_UNDEFINED + on error. */ + +extern int +xtensa_format_num_slots (xtensa_isa isa, xtensa_format fmt); + + +/* Get the opcode for a no-op in a particular slot. + Returns XTENSA_UNDEFINED on error. */ + +extern xtensa_opcode +xtensa_format_slot_nop_opcode (xtensa_isa isa, xtensa_format fmt, int slot); + + +/* Get the bits for a specified slot out of an insnbuf for the + instruction as a whole and put them into an insnbuf for that one + slot, and do the opposite to set a slot. Return non-zero on error. */ + +extern int +xtensa_format_get_slot (xtensa_isa isa, xtensa_format fmt, int slot, + const xtensa_insnbuf insn, xtensa_insnbuf slotbuf); + +extern int +xtensa_format_set_slot (xtensa_isa isa, xtensa_format fmt, int slot, + xtensa_insnbuf insn, const xtensa_insnbuf slotbuf); + + +/* Opcode information. */ /* Translate a mnemonic name to an opcode. Returns XTENSA_UNDEFINED if the name is not a valid opcode mnemonic. */ -extern xtensa_opcode xtensa_opcode_lookup (xtensa_isa, const char *); -/* Decode a binary instruction buffer. Returns the opcode or - XTENSA_UNDEFINED if the instruction is illegal. */ -extern xtensa_opcode xtensa_decode_insn (xtensa_isa, const xtensa_insnbuf); +extern xtensa_opcode +xtensa_opcode_lookup (xtensa_isa isa, const char *opname); -/* Opcode information. */ +/* Decode the opcode for one instruction slot from a binary instruction + buffer. Returns the opcode or XTENSA_UNDEFINED if the opcode is + illegal. */ + +extern xtensa_opcode +xtensa_opcode_decode (xtensa_isa isa, xtensa_format fmt, int slot, + const xtensa_insnbuf slotbuf); + -/* Set the opcode field(s) in a binary instruction buffer. The operand - fields are set to zero. */ -extern void xtensa_encode_insn (xtensa_isa, xtensa_opcode, xtensa_insnbuf); +/* Set the opcode field(s) for an instruction slot. All other fields + in the slot are set to zero. Returns non-zero if the opcode cannot + be encoded. */ -/* Get the mnemonic name for an opcode. */ -extern const char * xtensa_opcode_name (xtensa_isa, xtensa_opcode); +extern int +xtensa_opcode_encode (xtensa_isa isa, xtensa_format fmt, int slot, + xtensa_insnbuf slotbuf, xtensa_opcode opc); -/* Find the length (in bytes) of an instruction. */ -extern int xtensa_insn_length (xtensa_isa, xtensa_opcode); -/* Find the length of an instruction by looking only at the first byte. */ -extern int xtensa_insn_length_from_first_byte (xtensa_isa, char); +/* Get the mnemonic name for an opcode. Returns null on error. */ -/* Find the number of operands for an instruction. */ -extern int xtensa_num_operands (xtensa_isa, xtensa_opcode); +extern const char * +xtensa_opcode_name (xtensa_isa isa, xtensa_opcode opc); -/* Get the information about operand number "opnd" of a particular opcode. */ -extern xtensa_operand xtensa_get_operand (xtensa_isa, xtensa_opcode, int); +/* Check various properties of opcodes. These functions return 0 if + the condition is false, 1 if the condition is true, and + XTENSA_UNDEFINED on error. The instructions are classified as + follows: + + branch: conditional branch; may fall through to next instruction (B*) + jump: unconditional branch (J, JX, RET*, RF*) + loop: zero-overhead loop (LOOP*) + call: unconditional call; control returns to next instruction (CALL*) + + For the opcodes that affect control flow in some way, the branch + target may be specified by an immediate operand or it may be an + address stored in a register. You can distinguish these by + checking if the instruction has a PC-relative immediate + operand. */ + +extern int +xtensa_opcode_is_branch (xtensa_isa isa, xtensa_opcode opc); + +extern int +xtensa_opcode_is_jump (xtensa_isa isa, xtensa_opcode opc); + +extern int +xtensa_opcode_is_loop (xtensa_isa isa, xtensa_opcode opc); + +extern int +xtensa_opcode_is_call (xtensa_isa isa, xtensa_opcode opc); + + +/* Find the number of ordinary operands, state operands, and interface + operands for an instruction. These return XTENSA_UNDEFINED on + error. */ + +extern int +xtensa_opcode_num_operands (xtensa_isa isa, xtensa_opcode opc); + + +extern int +xtensa_opcode_num_stateOperands (xtensa_isa isa, xtensa_opcode opc); + +extern int +xtensa_opcode_num_interfaceOperands (xtensa_isa isa, xtensa_opcode opc); + + +/* Get functional unit usage requirements for an opcode. Each "use" + is identified by a pair. The + "num_funcUnit_uses" function returns the number of these "uses" or + XTENSA_UNDEFINED on error. The "funcUnit_use" function returns + a pointer to a "use" pair or null on error. */ + +typedef struct xtensa_funcUnit_use_struct +{ + xtensa_funcUnit unit; + int stage; +} xtensa_funcUnit_use; + +extern int +xtensa_opcode_num_funcUnit_uses (xtensa_isa isa, xtensa_opcode opc); + +extern xtensa_funcUnit_use * +xtensa_opcode_funcUnit_use (xtensa_isa isa, xtensa_opcode opc, int u); + + /* Operand information. */ -/* Find the kind of operand. There are three possibilities: - 1) PC-relative immediates (e.g., "l", "L"). These can be identified with - the xtensa_operand_isPCRelative function. - 2) non-PC-relative immediates ("i"). - 3) register-file short names (e.g., "a", "b", "m" and others defined - via TIE). */ -extern char * xtensa_operand_kind (xtensa_operand); +/* Get the name of an operand. Returns null on error. */ + +extern const char * +xtensa_operand_name (xtensa_isa isa, xtensa_opcode opc, int opnd); + + +/* Some operands are "invisible", i.e., not explicitly specified in + assembly language. When assembling an instruction, you need not set + the values of invisible operands, since they are either hardwired or + derived from other field values. The values of invisible operands + can be examined in the same way as other operands, but remember that + an invisible operand may get its value from another visible one, so + the entire instruction must be available before examining the + invisible operand values. This function returns 1 if an operand is + visible, 0 if it is invisible, or XTENSA_UNDEFINED on error. Note + that whether an operand is visible is orthogonal to whether it is + "implicit", i.e., whether it is encoded in a field in the + instruction. */ + +extern int +xtensa_operand_is_visible (xtensa_isa isa, xtensa_opcode opc, int opnd); -/* Check if an operand is an input ('<'), output ('>'), or inout ('=') + +/* Check if an operand is an input ('i'), output ('o'), or inout ('m') operand. Note: The output operand of a conditional assignment - (e.g., movnez) appears here as an inout ('=') even if it is declared - in the TIE code as an output ('>'); this allows the compiler to - properly handle register allocation for conditional assignments. */ -extern char xtensa_operand_inout (xtensa_operand); + (e.g., movnez) appears here as an inout ('m') even if it is declared + in the TIE code as an output ('o'); this allows the compiler to + properly handle register allocation for conditional assignments. + Returns 0 on error. */ + +extern char +xtensa_operand_inout (xtensa_isa isa, xtensa_opcode opc, int opnd); + /* Get and set the raw (encoded) value of the field for the specified operand. The "set" function does not check if the value fits in the - field; that is done by the "encode" function below. */ -extern uint32 xtensa_operand_get_field (xtensa_operand, const xtensa_insnbuf); + field; that is done by the "encode" function below. Both of these + functions return non-zero on error, e.g., if the field is not defined + for the specified slot. */ + +extern int +xtensa_operand_get_field (xtensa_isa isa, xtensa_opcode opc, int opnd, + xtensa_format fmt, int slot, + const xtensa_insnbuf slotbuf, uint32 *valp); -extern void xtensa_operand_set_field (xtensa_operand, xtensa_insnbuf, uint32); +extern int +xtensa_operand_set_field (xtensa_isa isa, xtensa_opcode opc, int opnd, + xtensa_format fmt, int slot, + xtensa_insnbuf slotbuf, uint32 val); -/* Encode and decode operands. The raw bits in the operand field - may be encoded in a variety of different ways. These functions hide the - details of that encoding. The encode function has a special return type - (xtensa_encode_result) to indicate success or the reason for failure; the - encoded value is returned through the argument pointer. The decode function - has no possibility of failure and returns the decoded value. */ +/* Encode and decode operands. The raw bits in the operand field may + be encoded in a variety of different ways. These functions hide + the details of that encoding. The result values are returned through + the argument pointer. The return value is non-zero on error. */ -typedef enum -{ - xtensa_encode_result_ok, - xtensa_encode_result_align, - xtensa_encode_result_not_in_table, - xtensa_encode_result_too_low, - xtensa_encode_result_too_high, - xtensa_encode_result_not_ok, - xtensa_encode_result_max = xtensa_encode_result_not_ok -} xtensa_encode_result; +extern int +xtensa_operand_encode (xtensa_isa isa, xtensa_opcode opc, int opnd, + uint32 *valp); + +extern int +xtensa_operand_decode (xtensa_isa isa, xtensa_opcode opc, int opnd, + uint32 *valp); + + +/* An operand may be either a register operand or an immediate of some + sort (e.g., PC-relative or not). The "is_register" function returns + 0 if the operand is an immediate, 1 if it is a register, and + XTENSA_UNDEFINED on error. The "regfile" function returns the + regfile for a register operand, or XTENSA_UNDEFINED on error. */ + +extern int +xtensa_operand_is_register (xtensa_isa isa, xtensa_opcode opc, int opnd); + +extern xtensa_regfile +xtensa_operand_regfile (xtensa_isa isa, xtensa_opcode opc, int opnd); + + +/* Register operands may span multiple consecutive registers, e.g., a + 64-bit data type may occupy two 32-bit registers. Only the first + register is encoded in the operand field. This function specifies + the number of consecutive registers occupied by this operand. For + non-register operands, the return value is undefined. Returns + XTENSA_UNDEFINED on error. */ + +extern int +xtensa_operand_num_regs (xtensa_isa isa, xtensa_opcode opc, int opnd); + + +/* Some register operands do not completely identify the register being + accessed. For example, the operand value may be added to an internal + state value. By definition, this implies that the corresponding + regfile is not allocatable. Unknown registers should generally be + treated with worst-case assumptions. The function returns 0 if the + register value is unknown, 1 if known, and XTENSA_UNDEFINED on + error. */ + +extern int +xtensa_operand_is_known_reg (xtensa_isa isa, xtensa_opcode opc, int opnd); + + +/* Check if an immediate operand is PC-relative. Returns 0 for register + operands and non-PC-relative immediates, 1 for PC-relative + immediates, and XTENSA_UNDEFINED on error. */ + +extern int +xtensa_operand_is_PCrelative (xtensa_isa isa, xtensa_opcode opc, int opnd); + + +/* For PC-relative offset operands, the interpretation of the offset may + vary between opcodes, e.g., is it relative to the current PC or that + of the next instruction? The following functions are defined to + perform PC-relative relocations and to undo them (as in the + disassembler). The "do_reloc" function takes the desired address + value and the PC of the current instruction and sets the value to the + corresponding PC-relative offset (which can then be encoded and + stored into the operand field). The "undo_reloc" function takes the + unencoded offset value and the current PC and sets the value to the + appropriate address. The return values are non-zero on error. Note + that these functions do not replace the encode/decode functions; the + operands must be encoded/decoded separately and the encode functions + are responsible for detecting invalid operand values. */ + +extern int +xtensa_operand_do_reloc (xtensa_isa isa, xtensa_opcode opc, int opnd, + uint32 *valp, uint32 pc); + +extern int +xtensa_operand_undo_reloc (xtensa_isa isa, xtensa_opcode opc, int opnd, + uint32 *valp, uint32 pc); + + +/* State Operands. */ + +/* Get the state accessed by a state operand. Returns XTENSA_UNDEFINED + on error. */ + +extern xtensa_state +xtensa_stateOperand_state (xtensa_isa isa, xtensa_opcode opc, int stOp); + + +/* Check if a state operand is an input ('i'), output ('o'), or inout + ('m') operand. Returns 0 on error. */ + +extern char +xtensa_stateOperand_inout (xtensa_isa isa, xtensa_opcode opc, int stOp); + + +/* Interface Operands. */ + +/* Get the external interface accessed by an interface operand. + Returns XTENSA_UNDEFINED on error. */ + +extern xtensa_interface +xtensa_interfaceOperand_interface (xtensa_isa isa, xtensa_opcode opc, + int ifOp); + + +/* Register Files. */ + +/* Regfiles include both "real" regfiles and "views", where a view + allows a group of adjacent registers in a real "parent" regfile to be + viewed as a single register. A regfile view has all the same + properties as its parent except for its (long) name, bit width, number + of entries, and default ctype. You can use the parent function to + distinguish these two classes. */ + +/* Look up a regfile by either its name or its abbreviated "short name". + Returns XTENSA_UNDEFINED on error. The "lookup_shortname" function + ignores "view" regfiles since they always have the same shortname as + their parents. */ + +extern xtensa_regfile +xtensa_regfile_lookup (xtensa_isa isa, const char *name); + +extern xtensa_regfile +xtensa_regfile_lookup_shortname (xtensa_isa isa, const char *shortname); + + +/* Get the name or abbreviated "short name" of a regfile. + Returns null on error. */ + +extern const char * +xtensa_regfile_name (xtensa_isa isa, xtensa_regfile rf); + +extern const char * +xtensa_regfile_shortname (xtensa_isa isa, xtensa_regfile rf); + + +/* Get the parent regfile of a "view" regfile. If the regfile is not a + view, the result is the same as the input parameter. Returns + XTENSA_UNDEFINED on error. */ + +extern xtensa_regfile +xtensa_regfile_view_parent (xtensa_isa isa, xtensa_regfile rf); + + +/* Get the bit width of a regfile or regfile view. + Returns XTENSA_UNDEFINED on error. */ + +extern int +xtensa_regfile_num_bits (xtensa_isa isa, xtensa_regfile rf); + + +/* Get the number of regfile entries. Returns XTENSA_UNDEFINED on + error. */ + +extern int +xtensa_regfile_num_entries (xtensa_isa isa, xtensa_regfile rf); + + +/* Processor States. */ + +/* Look up a state by name. Returns XTENSA_UNDEFINED on error. */ + +extern xtensa_state +xtensa_state_lookup (xtensa_isa isa, const char *name); + + +/* Get the name for a processor state. Returns null on error. */ + +extern const char * +xtensa_state_name (xtensa_isa isa, xtensa_state st); + + +/* Get the bit width for a processor state. + Returns XTENSA_UNDEFINED on error. */ + +extern int +xtensa_state_num_bits (xtensa_isa isa, xtensa_state st); + + +/* Check if a state is exported from the processor core. Returns 0 if + the condition is false, 1 if the condition is true, and + XTENSA_UNDEFINED on error. */ + +extern int +xtensa_state_is_exported (xtensa_isa isa, xtensa_state st); + + +/* Sysregs ("special registers" and "user registers"). */ + +/* Look up a register by its number and whether it is a "user register" + or a "special register". Returns XTENSA_UNDEFINED if the sysreg does + not exist. */ + +extern xtensa_sysreg +xtensa_sysreg_lookup (xtensa_isa isa, int num, int is_user); + + +/* Check if there exists a sysreg with a given name. + If not, this function returns XTENSA_UNDEFINED. */ + +extern xtensa_sysreg +xtensa_sysreg_lookup_name (xtensa_isa isa, const char *name); + + +/* Get the name of a sysreg. Returns null on error. */ + +extern const char * +xtensa_sysreg_name (xtensa_isa isa, xtensa_sysreg sysreg); + + +/* Get the register number. Returns XTENSA_UNDEFINED on error. */ + +extern int +xtensa_sysreg_number (xtensa_isa isa, xtensa_sysreg sysreg); + + +/* Check if a sysreg is a "special register" or a "user register". + Returns 0 for special registers, 1 for user registers and + XTENSA_UNDEFINED on error. */ + +extern int +xtensa_sysreg_is_user (xtensa_isa isa, xtensa_sysreg sysreg); + + +/* Interfaces. */ + +/* Find an interface by name. The return value is XTENSA_UNDEFINED if + the specified interface is not found. */ + +extern xtensa_interface +xtensa_interface_lookup (xtensa_isa isa, const char *ifname); + + +/* Get the name of an interface. Returns null on error. */ + +extern const char * +xtensa_interface_name (xtensa_isa isa, xtensa_interface intf); + + +/* Get the bit width for an interface. + Returns XTENSA_UNDEFINED on error. */ + +extern int +xtensa_interface_num_bits (xtensa_isa isa, xtensa_interface intf); + + +/* Check if an interface is an input ('i') or output ('o') with respect + to the Xtensa processor core. Returns 0 on error. */ + +extern char +xtensa_interface_inout (xtensa_isa isa, xtensa_interface intf); + + +/* Check if accessing an interface has potential side effects. + Currently "data" interfaces have side effects and "control" + interfaces do not. Returns 1 if there are side effects, 0 if not, + and XTENSA_UNDEFINED on error. */ + +extern int +xtensa_interface_has_side_effect (xtensa_isa isa, xtensa_interface intf); + + +/* Functional Units. */ + +/* Find a functional unit by name. The return value is XTENSA_UNDEFINED if + the specified unit is not found. */ + +extern xtensa_funcUnit +xtensa_funcUnit_lookup (xtensa_isa isa, const char *fname); -extern xtensa_encode_result xtensa_operand_encode (xtensa_operand, uint32 *); -extern uint32 xtensa_operand_decode (xtensa_operand, uint32); +/* Get the name of a functional unit. Returns null on error. */ +extern const char * +xtensa_funcUnit_name (xtensa_isa isa, xtensa_funcUnit fun); -/* For PC-relative offset operands, the interpretation of the offset may vary - between opcodes, e.g., is it relative to the current PC or that of the next - instruction? The following functions are defined to perform PC-relative - relocations and to undo them (as in the disassembler). The first function - takes the desired address and the PC of the current instruction and returns - the unencoded value to be stored in the offset field. The second function - takes the unencoded offset value and the current PC and returns the address. - Note that these functions do not replace the encode/decode functions; the - operands must be encoded/decoded separately. */ -extern int xtensa_operand_isPCRelative (xtensa_operand); +/* Functional units may be replicated. See how many instances of a + particular function unit exist. Returns XTENSA_UNDEFINED on error. */ -extern uint32 xtensa_operand_do_reloc (xtensa_operand, uint32, uint32); +extern int +xtensa_funcUnit_num_copies (xtensa_isa isa, xtensa_funcUnit fun); -extern uint32 xtensa_operand_undo_reloc (xtensa_operand, uint32, uint32); #ifdef __cplusplus } -- cgit v1.2.3