cvs commit: src/sys/powerpc/fpu fpu_add.c fpu_arith.h fpu_compare.c fpu_div.c fpu_emu.c fpu_emu.h fpu_explode.c fpu_extern.h fpu_implode.c fpu_instr.h fpu_mul.c fpu_sqrt.c fpu_subr.c

[David Schultz]

On Sat, Feb 23, 2008, Marcel Moolenaar wrote:
> marcel      2008-02-23 20:05:27 UTC
> 
>   FreeBSD src repository
> 
>   Added files:
>     sys/powerpc/fpu      fpu_add.c fpu_arith.h fpu_compare.c 
>                          fpu_div.c fpu_emu.c fpu_emu.h 
>                          fpu_explode.c fpu_extern.h fpu_implode.c 
>                          fpu_instr.h fpu_mul.c fpu_sqrt.c 
>                          fpu_subr.c 
>   Log:
>   Add a floating-point emulator so that a single userland or single ABI
>   can run on processors that don't have a FPU. This is typically the
>   case for Book E processors. While a tuned system will probably want
>   to use soft-float (or use a processor that has a FPU if the usage is
>   FP intensive enough), allowing hard-float on FPU-less systems gives
>   great portability and flexibility.
>   
>   Obtained from: NetBSD

It looks like everything except for fpu_emu.? and fpu_instr.h is
pretty generic, and surely there are other architectures (e.g.,
ARM, low-power 486-SX clones) that could use in-kernel FP emulation.
Do you think it's worthwhile to separate the MI bits and put them
somewhere other than sys/powerpc, or is the plan to burn that
bridge when we get to it?