On Mon, Sep 03, 2018 at 08:49:33PM +0530, Sandipan Das wrote:
> +#ifdef __powerpc64__
> + case 4:
> + if (!cpu_has_feature(CPU_FTR_ARCH_300))
> + return -1;
> +
> + switch (instr & 0x3f) {
> + case 48: /* maddhd */
> + asm("maddhd %0,%1,%2,%3" : "=r" (op->val) :
> + "r" (regs->gpr[ra]), "r" (regs->gpr[rb]),
> + "r" (regs->gpr[rc]));
> + goto compute_done;
If running maddhd does not work, will running it in kernel mode work?
I think you should *actually* emulate it.
(Same for the next patch, "darn", but emulation of that is much more
interesting).
Segher
