[Bug target/49868] Implement named address space to place/access data in flash memory

["gjl at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49868

--- Comment #11 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2012-01-10 09:42:14 UTC ---
Author: gjl
Date: Tue Jan 10 09:42:10 2012
New Revision: 183058

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=183058
Log:
libgcc/
    PR target/49868
    Extend __pgmx semantics to linearize memory.
    * config/avr/t-avr (LIB1ASMFUNCS): Add _xload_1, _movmemx.
    * config/avr/lib1funcs.S (__xload_1): New function.
    (__movmemx_qi, __movmemx_hi): New functions.
    (__xload_2, __xload_3, __xload_4): Rewrite to fit new __pgmx
    semantics.

gcc/
    PR target/49868
    Extend __pgmx semantics to linearize memory.
    * config/avr/avr.md (mov<mode>): Use avr_xload_libgcc_p to
    determine if code comes inline or from libgcc.
    (MOVMEM_r_d:HI): Add "w" to constraint for better preference.
    (movmem_qi, movmem_qi): Set constraint #2 to "n".
    (movmem_qi_elpm, movmem_hi_elpm): Remove insns.
    (movmemx_qi, movmemx_hi): New insns.
    (xload_<mode>_libgcc): Rewrite to new insn condition.
    (xload_<mode>): Remove insns.
    * config/avr/avr.c (avr_out_xload): Rewrite: Only need to handle
    cases that don't satisfy avr_xload_libgcc_p().
    (avr_addr_space_convert): Allow converting in any direction.
    (avr_addr_space_subset_p): Return always true.
    (avr_xload_libgcc_p): Rewrite to fit new __pgmx semantics.
    (avr_emit_movmemhi): Ditto.
    (avr_out_lpm): No need to handle ADDR_SPACE_PGMX any more.
    (avr_out_movmem): Ditto.
    (AVR_SYMBOL_FLAG_PROGMEM): New macro.
    (AVR_SYMBOL_SET_ADDR_SPACE): New macro.
    (AVR_SYMBOL_GET_ADDR_SPACE): New macro.
    (avr_encode_section_info): Encode 'progmem' in symbol flags.
    (output_reload_in_const): Don't zero-extend any 24-bit symbols.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/avr/avr.c
    trunk/gcc/config/avr/avr.md
    trunk/libgcc/ChangeLog
    trunk/libgcc/config/avr/lib1funcs.S
    trunk/libgcc/config/avr/t-avr