------- Comment #2 from justin at mattair dot net 2010-04-29 02:38 ------- Created an attachment (id=20511) --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20511&action=view) patch for patch-xmega
It looks like possibly a copy-paste error was made in the patch-xmega file. The following starting on line 573 of patch-xmega (from the build-avr-gcc-4.3.4-binutils-2.20-libc-1.6.8-insight6.8-dude-5.10-insight-patch script available on AVRFreaks.net): + return *l = 4, (AS2 (sbiw,%r0,1) CR_TAB + AS2 (st,%p0+,%A1) CR_TAB + AS2 (st,%p0,%B1) CR_TAB + AS2 (sbiw,%r0,2)); I think should be: + return *l = 4, (AS2 (sbiw,%r0,2) CR_TAB + AS2 (st,%p0+,%A1) CR_TAB + AS2 (st,%p0,%B1) CR_TAB + AS2 (sbiw,%r0,1)); This may have been caused by copying code from one of the post-increment sections utilizing adiw, then converting it to pre-decrement utilizing sbiw, then forgetting to swap the 2 and 1. I assume that the second sbiw instruction is needed to put the pointer back at the location it was at after the first sbiw. Someone more knowledgeable about GCC's innards should check this. Attached is a patch for the patch-xmega, um, patch. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43876
