Hi,
with this patch, the assembler allows use of conditional Thumb-2
instructions without requiring explicit IT instructions.
The patch adds the -mauto-it command-line option to enable this
automatic generation of IT instructions. When not specified, the
original behavior takes place.
I tested this by running the gas testsuite, plus some test cases I added.
Please note that I don't have write access, so please commit this for me
if accepted.
Thanks,
Daniel.
2009-05-07 Daniel Gutson <dgutson@codesourcery.com>
gas/
* config/tc-arm.c (do_automatic_it): New variable.
(it_instruction_type): New enum.
(arm_it): New field.
(it_state): New enum.
(current_it): New struct and global variable.
(current_it_compatible): New function.
(conditional_insn): New function.
(set_it_insn_type): New macro.
(set_it_insn_type_last): New macro.
(do_t_add_sub): Call automatic IT machinery functions.
(do_t_arit3): Likewise.
(do_t_arit3c): Likewise.
(do_t_blx): Likewise.
(do_t_branch): Likewise.
(do_t_bkpt): Likewise.
(do_t_branch23): Likewise.
(do_t_bx): Likewise.
(do_t_bxj): Likewise.
(do_t_cps): Likewise.
(do_t_cpsi): Likewise.
(do_t_cbz): Likewise.
(do_t_it): Likewise.
(encode_thumb2_ldmstm): Likewise.
(do_t_ldst): Likewise.
(do_t_mov_cmp): Likewise.
(do_t_mvn_tst): Likewise.
(do_t_mul): Likewise.
(do_t_neg): Likewise.
(do_t_setend): Likewise.
(do_t_shift): Likewise.
(do_t_tb): Likewise.
(output_it_inst): New function.
(new_automatic_it_block): New function.
(close_automatic_it_block): New function.
(current_it_add_mask): New function.
(it_fsm_pre_encode): New function.
(handle_it_state): New function.
(it_fsm_post_encode): New function.
(force_automatic_it_block_close): New function.
(in_it_block): New function.
(md_assemble): Call automatic IT block machinery functions.
(arm_frob_label): Likewise.
(arm_opts): New element.
* doc/c-arm.texi: New option -mauto-it.
gas/testsuite/
* gas/arm/arm-it-auto.d: New test.
* gas/arm/arm-it-auto.s: New file.
* gas/arm/thumb2_it_auto.d: New test.
* gas/arm/thumb2_it_bad.l: Error message updated.
* gas/arm/thumb2_it_bad_auto.d: New test.
* gas/arm/thumb2_it.d: Comment added.
* gas/arm/thumb2_it_bad.d: Comment added.