Hi ! There seem to be a problem with gcc 4.0 and implicit generation of altivec instructions when -mcpu=970.
The problem is that the kernel cannot afford to use altivec instructions (nor FPU) except in controlled environment. Specifically, things like the RAID6 code has altivec (and SSE/2, which I think has a similar problem) implementation which runs in the proper environment. In order to build that, we have -mcpu=970. Unfortunately, with 4.0, that causes gcc to implicitely generate altivec code, which breaks it all. So what is the proper way or set of options for me to: 1) optionally have POWER4 optimisations (that must be independant on the rest below) 2) be able to use altivec instructions in assembly 3) be able to use altivec in a few selected bits of C code 4) never have altivec code implicitely generated by the compiler Regards, Ben.
