[PATCH], Improve vector int/long initialization on PowerPC

[Pat Haugen]

On 08/03/2016 11:33 PM, Michael Meissner wrote:
>  {
> -  if (BYTES_BIG_ENDIAN)
> -    return "xxpermdi %x0,%x1,%x2,0";
> +  if (which_alternative == 0)
> +    return (BYTES_BIG_ENDIAN
> +	    ? "xxpermdi %x0,%x1,%x2,0"
> +	    : "xxpermdi %x0,%x2,%x1,0");
> +
> +  else if (which_alternative == 1)
> +    return (BYTES_BIG_ENDIAN
> +	    ? "mtvsrdd %x0,%1,%2"
> +	    : "mtvsrdd %x0,%2,%1");
> +
>    else
> -    return "xxpermdi %x0,%x2,%x1,0";
> +    gcc_unreachable ();
>  }
> -  [(set_attr "type" "vecperm")])
> +  [(set_attr "type" "vecperm,mftgpr")
> +   (set_attr "length" "4")])

mtvsrdd actually behaves like a permute, so vecperm would be best insn type for it.

-Pat