re PR target/49868 (Implement named address space to place/access data in flash memory)

gcc/
	PR target/49868
	* config/avr/avr.h (base_arch_s): Add field n_segments.
	(ADDR_SPACE_PGM1, ADDR_SPACE_PGM2, ADDR_SPACE_PGM3,
	ADDR_SPACE_PGM4, ADDR_SPACE_PGM5, ADDR_SPACE_PGMX): New address spaces.
	(AVR_HAVE_ELPM, AVR_HAVE_ELPMX): New defines.
	(INIT_EXPANDERS): New define.
	* config/avr/avr-protos.h (avr_mem_pgmx_p): New.
	(avr_init_expanders): New.
	(avr_emit_movmemhi, avr_out_movmem): New.
	(avr_xload_libgcc_p): New.
	* config/avr/avr-c.c (avr_register_target_pragmas): Register
	address spaces __pgm1, __pgm2,  __pgm3,  __pgm4  __pgm5,  __pgmx.
	(avr_cpu_cpp_builtins): Add built-in defines __PGM1,
	__PGM2, __PGM3, __PGM4, __PGM5, __PGMX.
	* config/avr/avr-devices.c (avr_arch_types): Set field n_segments.

	* config/avr/avr.c (AVR_SECTION_PROGMEM): Change define to cover
	3 bits instead of just 1.
	(xstring_empty, xstring_e, rampz_rtx): New static GTYed variables.
	(progmem_section): Change from section to array of sections.
	(progmem_section_prefix): New static variable.
	(avr_file_start): Print set for __RAMPZ__
	(avr_option_override): Move initialization of RTXes from here...
	(avr_init_expanders): ...to this new function.
	(avr_pgm_segment): New static function.
	(avr_decl_pgm_p): Handle error_mark_node.
	(avr_mem_pgmx_p, avr_decl_pgmx_p): New static functions.
	(avr_out_xload,	avr_find_unused_d_reg): New static functions.
	(expand_prologue, expand_epilogue): Use rampz_rtx.
	(print_operand): Hande CONST_STRING.
	(avr_xload_libgcc_p): New static function.
	(avr_out_lpm_no_lpmx, avr_out_lpm): Handle ELPM.
	(avr_progmem_p): Return 2 for 24-bit flash address space.
	(avr_out_sbxx_branch): Clean-up code from ASn macros.
	(out_movqi_r_mr, out_movqi_mr_r): Ditto. And recognize RAMPZ's
	address and print symbolically.
	(avr_asm_named_section, avr_section_type_flags,
	avr_encode_section_info, avr_asm_select_section,
	avr_addr_space_address_mode, avr_addr_space_pointer_mode,
	avr_addr_space_legitimate_address_p, avr_addr_space_convert,
	avr_addr_space_legitimize_address): Handle new address spaces.
	(avr_output_progmem_section_asm_op): New static function.
	(avr_asm_init_sections): Initialize progmem_section[].
	(adjust_insn_length): Handle ADJUST_LEN_XLOAD, ADJUST_LEN_MOVMEM.
	(avr_const_address_lo16): New static function.
	(avr_assemble_integer): Use it to handle 3-byte integers.
	(avr_emit_movmemhi, avr_out_movmem): New functions.
	
	* config/avr/predicates.md (nox_general_operand): Handle new
	address spaces.
	* config/avr/avr.md (unspec): Add UNSPEC_MOVMEM.
	(adjust_len): Add xload, movmem.
	(SP_ADDR): New define_constants.
	(isa): Add "lpm", "lpmx", "elpm", "elpmx".
	(enabled): Handle them.
	(load<mode>_libgcc): New expander.
	(*load.<mode>.libgcc): Rename to load_<mode>_libgcc.
	(xload8_A, xload<mode>_A): New insn-and-splits.
	(xload_8, xload_<mode>_libgcc, xload_<mode>, loadmem_elpm): New insns.
	(mov<mode>): Handle new address spaces.
	(movmemhi): Rewrite using avr_emit_movmemhi.
	(MOVMEM_r_d): New mode attribute.
	(movmem_<mode>, movmem_qi_elpm): New insns.
	(setmemhi, *clrmemqi, *clrmemhi, strlenhi, *strlenhi): Unquote
	C-code.  Use label instead of hard-coded instrunction lengths.
	
libgcc/
	PR target/49868
	* config/avr/t-avr (LIB1ASMFUNCS): Add _xload_2 _xload_3 _xload_4.
	* config/avr/lib1funcs.S (__xload_2, __xload_3, __xload_4):
	New functions.

From-SVN: r181482

3 files changed, 75 insertions, 0 deletions

diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog
index 57fcc54..86b482f 100644
--- a/libgcc/ChangeLog
+++ b/libgcc/ChangeLog
@@ -1,3 +1,10 @@
+2011-11-18  Georg-Johann Lay  <avr@gjlay.de>
+
+	PR target/49868
+	* config/avr/t-avr (LIB1ASMFUNCS): Add _xload_2 _xload_3 _xload_4.
+	* config/avr/lib1funcs.S (__xload_2, __xload_3, __xload_4):
+	New functions.
+
 2011-11-16  Matthew Gretton-Dann  <matthew.gretton-dann@arm.com>
 
 	* config/arm/lib1funcs.asm (udivsi3): Add support for divide
diff --git a/libgcc/config/avr/lib1funcs.S b/libgcc/config/avr/lib1funcs.S
index 573761b..aee69e5 100644
--- a/libgcc/config/avr/lib1funcs.S
+++ b/libgcc/config/avr/lib1funcs.S
@@ -1227,6 +1227,73 @@ ENDF __load_4
 
 #endif /* L_load_3 || L_load_3 */
 
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Loading n bytes from Flash; n = 2,3,4
+;; R22... = Flash[R21:Z]
+;; Clobbers: __tmp_reg__, R21, R30, R31
+
+#if (defined (L_xload_2)            \
+     || defined (L_xload_3)         \
+     || defined (L_xload_4))        \
+    && defined (__AVR_HAVE_ELPM__)  \
+    && !defined (__AVR_HAVE_ELPMX__)
+
+#if !defined (__AVR_HAVE_RAMPZ__)
+#error Need RAMPZ
+#endif /* have RAMPZ */
+
+;; Destination
+#define D0  22
+#define D1  D0+1
+#define D2  D0+2
+#define D3  D0+3
+
+;; Register containing bits 16+ of the address
+
+#define HHI8  21
+
+.macro  .xload dest, n
+    elpm
+    mov     \dest, r0
+.if \dest != D0+\n-1
+    adiw    r30, 1
+    adc     HHI8, __zero_reg__
+    out     __RAMPZ__, HHI8
+.endif
+.endm
+
+#if defined (L_xload_2)
+DEFUN __xload_2
+    out     __RAMPZ__, HHI8
+    .xload D0, 2
+    .xload D1, 2
+    ret
+ENDF __xload_2
+#endif /* L_xload_2 */
+
+#if defined (L_xload_3)
+DEFUN __xload_3
+    out     __RAMPZ__, HHI8
+    .xload D0, 3
+    .xload D1, 3
+    .xload D2, 3
+    ret
+ENDF __xload_3
+#endif /* L_xload_3 */
+
+#if defined (L_xload_4)
+DEFUN __xload_4
+    out     __RAMPZ__, HHI8
+    .xload D0, 4
+    .xload D1, 4
+    .xload D2, 4
+    .xload D3, 4
+    ret
+ENDF __xload_4
+#endif /* L_xload_4 */
+
+#endif /* L_xload_{2|3|4} && ELPM */
+
 
 .section .text.libgcc.builtins, "ax", @progbits
 
diff --git a/libgcc/config/avr/t-avr b/libgcc/config/avr/t-avr
index 486214c..5ebb17e 100644
--- a/libgcc/config/avr/t-avr
+++ b/libgcc/config/avr/t-avr
@@ -22,6 +22,7 @@ LIB1ASMFUNCS = \
 	_tablejump \
 	_tablejump_elpm \
 	_load_3 _load_4 \
+	_xload_2 _xload_3 _xload_4 \
 	_copy_data \
 	_clear_bss \
 	_ctors \