Oleg Kravchenko <oleg@xxxxxxxxxx> writes: >>asusp535 ~ # gcc -march=armv5te -mtune=iwmmxt test2.c -o /dev/null >>/tmp/cc3tFpwv.s: Assembler messages: >>/tmp/cc3tFpwv.s:24: Error: selected processor does not support `wunpckelub >>wr6,wr4' I should have said that another approach is simply the compiler option -march=iwmmxt. Ian