Dave Fick <dfick@xxxxxxxxx> writes: > I implemented a small alpha processor and am now trying to use it. It > has only a very small subset of the alpha instructions. Is there a way > to tell GCC to use or not use individual instructions? Right now I use > a script to find and replace unsupported assembly instructions before > calling the assembler - but there many I haven't done yet.It would be > nice to avoid this so that I can turn on optimizations. Look in gcc/config/alpha. Add a new option. Test for that option in alpha.md. This will only work if you provide enough instructions for gcc to operate. Ian