b3a88ae94b
* 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.
785 lines
25 KiB
C
785 lines
25 KiB
C
/* Interface definition for configurable Xtensa ISA support.
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Copyright 2003, 2004 Free Software Foundation, Inc.
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This file is part of BFD, the Binary File Descriptor library.
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||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 2 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program; if not, write to the Free Software
|
||
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
||
|
||
#ifndef XTENSA_LIBISA_H
|
||
#define XTENSA_LIBISA_H
|
||
|
||
#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.
|
||
|
||
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
|
||
. 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 int xtensa_opcode;
|
||
typedef int xtensa_format;
|
||
typedef int xtensa_regfile;
|
||
typedef int xtensa_state;
|
||
typedef int xtensa_sysreg;
|
||
typedef int xtensa_interface;
|
||
typedef int xtensa_funcUnit;
|
||
|
||
|
||
/* Define a unique value for undefined items. */
|
||
|
||
#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 "insnbuf_words" of the xtensa_insnbuf array. */
|
||
|
||
extern int
|
||
xtensa_insnbuf_size (xtensa_isa isa);
|
||
|
||
|
||
/* Allocate an xtensa_insnbuf of the right size. */
|
||
|
||
extern xtensa_insnbuf
|
||
xtensa_insnbuf_alloc (xtensa_isa isa);
|
||
|
||
|
||
/* Release an xtensa_insnbuf. */
|
||
|
||
extern void
|
||
xtensa_insnbuf_free (xtensa_isa isa, xtensa_insnbuf buf);
|
||
|
||
|
||
/* 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. */
|
||
|
||
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 isa);
|
||
|
||
|
||
/* Get the maximum instruction size in bytes. */
|
||
|
||
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 isa, const char *opname);
|
||
|
||
|
||
/* 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) for an instruction slot. All other fields
|
||
in the slot are set to zero. Returns non-zero if the opcode cannot
|
||
be encoded. */
|
||
|
||
extern int
|
||
xtensa_opcode_encode (xtensa_isa isa, xtensa_format fmt, int slot,
|
||
xtensa_insnbuf slotbuf, xtensa_opcode opc);
|
||
|
||
|
||
/* Get the mnemonic name for an opcode. Returns null on error. */
|
||
|
||
extern const char *
|
||
xtensa_opcode_name (xtensa_isa isa, xtensa_opcode opc);
|
||
|
||
|
||
/* 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 <functional unit, pipeline stage> 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. */
|
||
|
||
/* 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 ('i'), output ('o'), or inout ('m')
|
||
operand. Note: The output operand of a conditional assignment
|
||
(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. 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 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 result values are returned through
|
||
the argument pointer. The return value is non-zero on error. */
|
||
|
||
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);
|
||
|
||
|
||
/* Get the name of a functional unit. Returns null on error. */
|
||
|
||
extern const char *
|
||
xtensa_funcUnit_name (xtensa_isa isa, xtensa_funcUnit fun);
|
||
|
||
|
||
/* Functional units may be replicated. See how many instances of a
|
||
particular function unit exist. Returns XTENSA_UNDEFINED on error. */
|
||
|
||
extern int
|
||
xtensa_funcUnit_num_copies (xtensa_isa isa, xtensa_funcUnit fun);
|
||
|
||
|
||
#ifdef __cplusplus
|
||
}
|
||
#endif
|
||
#endif /* XTENSA_LIBISA_H */
|