[AVR32] Don't use __builtin_xchg()

Browse source

The implementation of __builtin_xchg() in at least some versions of
avr32 gcc is buggy. Rather than find out exactly which versions that
have this bug, let's just avoid the problem altogether by implementing
xchg() in inline assembly.

Also, in most architectures, xchg() seems to imply a memory barrier,
while the existing avr32 implementation did not. This patch also fixes
that discrepancy.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

...

This commit is contained in:

Haavard Skinnemoen 2007-10-03 15:05:20 +02:00

parent 82c54f864f

commit bb7aa6d47f

1 changed files with 9 additions and 4 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

13

include/asm-avr32/system.h

View file