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libgcc.S (__RAMPZ__): Define.

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* config/avr/libgcc.S (__RAMPZ__): Define.
	(__do_copy_data): Add for devices with 128KB code memory.

From-SVN: r132555
This commit is contained in:
Anatoly Sokolov 2008-02-22 23:16:50 +03:00 • committed by Anatoly Sokolov
parent a4899c0123
commit 34d02d17ac
2 changed files with 48 additions and 7 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2008-02-22 Anatoly Sokolov <aesok@post.ru>
* config/avr/libgcc.S (__RAMPZ__): Define.
(__do_copy_data): Add for devices with 128KB code memory.
2008-02-22 Nathan Froyd <froydnj@codesourcery.com>
* config/rs6000/linuxspe.h (SUBSUBTARGET_OVERRIDE_OPTIONS):

50
gcc/config/avr/libgcc.S
View file

@ -32,6 +32,7 @@ Boston, MA 02110-1301, USA. */
#define __SREG__ 0x3f
#define __SP_H__ 0x3e
#define __SP_L__ 0x3d
#define __RAMPZ__ 0x3B
/* Most of the functions here are called directly from avr.md
patterns, instead of using the standard libcall mechanisms.
@ -686,20 +687,54 @@ __tablejump__:
.endfunc
#endif /* defined (L_tablejump) */
/* __do_copy_data is only necessary if there is anything in .data section.
Does not use RAMPZ - crt*.o provides a replacement for >64K devices. */
#ifdef L_copy_data
.section .init4,"ax",@progbits
.global __do_copy_data
__do_copy_data:
#if defined(__AVR_HAVE_ELPMX__)
ldi r17, hi8(__data_end)
ldi r26, lo8(__data_start)
ldi r27, hi8(__data_start)
ldi r30, lo8(__data_load_start)
ldi r31, hi8(__data_load_start)
rjmp .do_copy_data_start
.do_copy_data_loop:
ldi r16, hh8(__data_load_start)
out __RAMPZ__, r16
rjmp .L__do_copy_data_start
.L__do_copy_data_loop:
elpm r0, Z+
st X+, r0
.L__do_copy_data_start:
cpi r26, lo8(__data_end)
cpc r27, r17
brne .L__do_copy_data_loop
#elif !defined(__AVR_HAVE_ELPMX__) && defined(__AVR_HAVE_ELPM__)
ldi r17, hi8(__data_end)
ldi r26, lo8(__data_start)
ldi r27, hi8(__data_start)
ldi r30, lo8(__data_load_start)
ldi r31, hi8(__data_load_start)
ldi r16, hh8(__data_load_start - 0x10000)
.L__do_copy_data_carry:
inc r16
out __RAMPZ__, r16
rjmp .L__do_copy_data_start
.L__do_copy_data_loop:
elpm
st X+, r0
adiw r30, 1
brcs .L__do_copy_data_carry
.L__do_copy_data_start:
cpi r26, lo8(__data_end)
cpc r27, r17
brne .L__do_copy_data_loop
#elif !defined(__AVR_HAVE_ELPMX__) && !defined(__AVR_HAVE_ELPM__)
ldi r17, hi8(__data_end)
ldi r26, lo8(__data_start)
ldi r27, hi8(__data_start)
ldi r30, lo8(__data_load_start)
ldi r31, hi8(__data_load_start)
rjmp .L__do_copy_data_start
.L__do_copy_data_loop:
#if defined (__AVR_HAVE_LPMX__)
lpm r0, Z+
#else
@ -707,10 +742,11 @@ __do_copy_data:
adiw r30, 1
#endif
st X+, r0
.do_copy_data_start:
.L__do_copy_data_start:
cpi r26, lo8(__data_end)
cpc r27, r17
brne .do_copy_data_loop
brne .L__do_copy_data_loop
#endif /* !defined(__AVR_HAVE_ELPMX__) && !defined(__AVR_HAVE_ELPM__) */
#endif /* L_copy_data */
/* __do_clear_bss is only necessary if there is anything in .bss section. */