This is the mail archive of the gcc-patches@gcc.gnu.org mailing list for the GCC project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: [PATCH] Use GET_MODE_BITSIZE to get vector natural alignment


On Fri, Oct 16, 2015 at 7:42 PM, H.J. Lu <hongjiu.lu@intel.com> wrote:
> Since GET_MODE_ALIGNMENT is defined by psABI and the biggest alignment
> is 4 byte for IA MCU psABI, we should use GET_MODE_BITSIZE to get
> vector natural alignment to check misaligned vector move.
>
> OK for trunk?
>
> Thanks.
>
> H.J.
> ---
>         * config/i386/i386.c (ix86_expand_vector_move): Use
>         GET_MODE_BITSIZE to get vector natural alignment.
> ---
>  gcc/config/i386/i386.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
> index ebe2b0a..d0e1f4c 100644
> --- a/gcc/config/i386/i386.c
> +++ b/gcc/config/i386/i386.c
> @@ -18650,7 +18650,9 @@ void
>  ix86_expand_vector_move (machine_mode mode, rtx operands[])
>  {
>    rtx op0 = operands[0], op1 = operands[1];
> -  unsigned int align = GET_MODE_ALIGNMENT (mode);
> +  /* Use GET_MODE_BITSIZE instead of GET_MODE_ALIGNMENT since the
> +     biggest alignment is 4 byte for IA MCU psABI.  */
> +  unsigned int align = GET_MODE_BITSIZE (mode);

How about using TARGET_IAMCU condition here and using bitsize only for
TARGET_IAMCU?

Uros.

>    if (push_operand (op0, VOIDmode))
>      op0 = emit_move_resolve_push (mode, op0);
> --
> 2.4.3
>


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]