On 11/12/19 11:29 AM, m wrote: > Hello gcc developers! > > I am working on a new back end for my MRISC32 ISA [1], and I'm still very > new to gcc internals. I suspect that I will have more questions further > down the road, but let's start with this topic... > > The MRISC32 ISA has instructions for setting a register based on the > outcome of a comparison. For instance: > > slt s1, s2, s3 > > ...which is equal to (in C): > > int s1 = s2 < s3 ? -1 : 0; Look at STORE_FLAG_VALUE. m68k for example works like this.
jeff
