On Wed, May 11, 2005 at 11:31:51AM -0700, Greg McGary wrote: > I have a port for a multi-processor with high-latency memory accesses, > even for cache hits. Each CPU core has a small private scratchpad RAM > with 1 cycle access. I'd like to persuade GCC to use the scratchpad > (I'll probably allocate somewhere between 8 and 32 words) for reload, > rather than stack slots which have much higher latency. I have some > ill-formed ideas about how to do this, which could involve describing > these as another class of register, only movable in/out of general > registers. I'm still trying to understand secondary-reload well > enough to determine if that's the mechanism I want.
Yes, that's one way to do it. Or you could try telling the entire compiler to treat them as registers, instead of just reload. That's likely to work as well or better. -- Daniel Jacobowitz CodeSourcery, LLC
