This patch is addendum to support skip of 2-word instructions as of PR49939 and
the extension made in
http://gcc.gnu.org/viewcvs?view=revision&revision=177049
gas emits a warning if it sees a skip of 2-word instruction for cores that
might have the skip bug. However, only specific devices are affected by this
silicon bug, namely ATmega103 and AT90S8515.
The patch adds -mno-skip-bug option to gas's command line except for the cases
where the core might have the bug, i.e.
o no -mmcu specified at all
o -mmcu=atmega103
o -mmcu=at90s8515
o -mmcu=avr31
o -mmcu=avr2
Ok for the trunk?
Johann
* config/avr/avr.h (ASM_SPEC): Add -mno-skip-bug if we know that
the device does not have the skip-bug.
Index: config/avr/avr.h
===================================================================
--- config/avr/avr.h (revision 184618)
+++ config/avr/avr.h (working copy)
@@ -595,7 +595,9 @@ extern const char *avr_device_to_devicel
pass to `cc1plus'. */
#define ASM_SPEC "%{mmcu=avr25:-mmcu=avr2;mmcu=avr35:-mmcu=avr3;mmcu=avr31:-mmcu=avr3;mmcu=avr51:-mmcu=avr5;\
-mmcu=*:-mmcu=%*}"
+mmcu=*:-mmcu=%*} \
+%{mmcu=*:%{!mmcu=avr2:%{!mmcu=at90s8515:%{!mmcu=avr31:%{!mmcu=atmega103:\
+-mno-skip-bug}}}}}"
#define LINK_SPEC "\
%{mrelax:--relax\
