> Actually, from gcc/config/rs6000.h: > > /* 1 for registers that have pervasive standard uses > and are not available for the register allocator.
[snip] > So cr5, which is number 73, is never used by gcc. Not available for RA is not the same thing at all as not used by GCC. For example, GPR1 and XER[CA] are also fixed regs. But, indeed, it does look like GCC doesn't use it. It seems to me that some ABI forbade userland (or non-libraries or whatever) from using it. I'll see what I can find out. Segher _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
