https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118001
--- Comment #1 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Georg-Johann Lay <g...@gcc.gnu.org>: https://gcc.gnu.org/g:f8a602ce5394ef7e0c56b48e3bd89f97f0411c45 commit r15-6171-gf8a602ce5394ef7e0c56b48e3bd89f97f0411c45 Author: Georg-Johann Lay <a...@gjlay.de> Date: Wed Dec 11 13:28:47 2024 +0100 AVR: target/118001 - Add __flashx as 24-bit named address space. This patch adds __flashx as a new named address space that allocates objects in .progmemx.data. The handling is mostly the same or similar to that of 24-bit space __memx, except that the asm routines are simpler and more efficient. Loads are emit inline when ELPMX or LPMX is available. The address space uses a 24-bit addresses even on devices with a program memory size of 64 KiB or less. PR target/118001 gcc/ * doc/extend.texi (AVR Named Address Spaces): Document __flashx. * config/avr/avr.h (ADDR_SPACE_FLASHX): New enum value. * config/avr/avr-protos.h (avr_out_fload, avr_mem_flashx_p) (avr_fload_libgcc_p, avr_load_libgcc_mem_p) (avr_load_libgcc_insn_p): New. * config/avr/avr.cc (avr_addrspace): Add ADDR_SPACE_FLASHX. (avr_decl_flashx_p, avr_mem_flashx_p, avr_fload_libgcc_p) (avr_load_libgcc_mem_p, avr_load_libgcc_insn_p, avr_out_fload): New functions. (avr_adjust_insn_length) [ADJUST_LEN_FLOAD]: Handle case. (avr_progmem_p) [avr_decl_flashx_p]: return 2. (avr_addr_space_legitimate_address_p) [ADDR_SPACE_FLASHX]: Has same behavior like ADDR_SPACE_MEMX. (avr_addr_space_convert): Use pointer sizes rather then ASes. (avr_addr_space_contains): New function. (avr_convert_to_type): Use it. (avr_emit_cpymemhi): Handle ADDR_SPACE_FLASHX. * config/avr/avr.md (adjust_len) <fload>: New attr value. (gen_load<mode>_libgcc): Renamed from load<mode>_libgcc. (xload8<mode>_A): Iterate over MOVMODE rather than over ALL1. (fxmov<mode>_A): New from xloadv<mode>_A. (xmov<mode>_8): New from xload<mode>_A. (fmov<mode>): New insns. (fxload<mode>_A): New from xload<mode>_A. (fxload_<mode>_libgcc): New from xload_<mode>_libgcc. (*fxload_<mode>_libgcc): New from *xload_<mode>_libgcc. (mov<mode>) [avr_mem_flashx_p]: Hande ADDR_SPACE_FLASHX. (cpymemx_<mode>): Make sure the address space is not lost when splitting. (*cpymemx_<mode>) [ADDR_SPACE_FLASHX]: Use __movmemf_<mode> for asm. (*ashlqi.1.zextpsi_split): New combine pattern. * config/avr/predicates.md (nox_general_operand): Don't match when avr_mem_flashx_p is true. * config/avr/avr-passes.cc (AVR_LdSt_Props): ADDR_SPACE_FLASHX has no post_inc. gcc/testsuite/ * gcc.target/avr/torture/addr-space-1.h [AVR_HAVE_ELPM]: Use a function to bump .progmemx.data to a high address. * gcc.target/avr/torture/addr-space-2.h: Same. * gcc.target/avr/torture/addr-space-1-fx.c: New test. * gcc.target/avr/torture/addr-space-2-fx.c: New test. libgcc/ * config/avr/t-avr (LIB1ASMFUNCS): Add _fload_1, _fload_2, _fload_3, _fload_4, _movmemf. * config/avr/lib1funcs.S (.branch_plus): New .macro. (__xload_1, __xload_2, __xload_3, __xload_4): When the address is located in flash, then forward to... (__fload_1, __fload_2, __fload_3, __fload_4): ...these new functions, respectively. (__movmemx_hi): When the address is located in flash, forward to... (__movmemf_hi): ...this new function.
