maddu $31, $0
sync
+ # Enable sc/ll instructions by changing ISA level:
+ .set push
+ .set mips2
+ ll $5, 0($6)
+ sc $5, 0($6)
+ .set pop
+
+ # Enable scd/lld instructions by changing ISA level:
+ .set push
+ .set mips3
+ lld $5, 0($6)
+ scd $5, 0($6)
+ .set pop
+
.space 8
.end stuff