"Mark B" <javadlux@xxxxxxxxx> writes: > I have a virtual CPU architecture set up that is rather strange. It > has similar commands to the x86 architecture, but every registry > memory location is 1 'byte' each byte is really a 32 bit floating > point number. So if you go > > mov [345], 1 > mov [346], 2e99 > > this moves the floating point number 1.0 into memory location 345, and > floating point number 2e99 into memory location 346, even though these > are 32 bit floats and each address is only 1 'byte'. Get it? I was > wondering if it would be possible to write a gcc backend for this kind > of cpu. I was under the impression that the backend had to have RTLs > for at least mov instructions for QImode and SFmode... is it possible > to have everything run in a single mode that is floating point? Your only hope of making this work is to #define BITS_PER_UNIT 32. This assumes that you can always store a 32-bit value in each memory location. Such processors are rare, and there are occasionally problems working with them. Ian
