Re: [Qemu-devel] [PATCH 02/42] target-ppc: add helper macros for later patches.

[Aurelien Jarno <aurelien@aurel32.net>]

On Sun, Dec 14, 2008 at 06:14:35PM -0800, Nathan Froyd wrote:
> 
> Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
> ---
>  target-ppc/op_helper.c |   33 +++++++++++++++++++++++++++++++++
>  1 files changed, 33 insertions(+), 0 deletions(-)
> 
> diff --git a/target-ppc/op_helper.c b/target-ppc/op_helper.c
> index 2d665e8..c597632 100644
> --- a/target-ppc/op_helper.c
> +++ b/target-ppc/op_helper.c
> @@ -2007,6 +2007,39 @@ target_ulong helper_dlmzb (target_ulong high, target_ulong low, uint32_t update_
>  }
>  
>  /*****************************************************************************/
> +/* Altivec extension helpers */
> +#if defined(WORDS_BIGENDIAN)
> +#define HI_IDX 0
> +#define LO_IDX 1
> +#else
> +#define HI_IDX 1
> +#define LO_IDX 0
> +#endif
> +
> +#define N_ELEMS(element) (sizeof (r->element) / sizeof (r->element[0]))
> +
> +#define VECTOR_FOR(element)                     \
> +  int i;                                        \
> +  VECTOR_FOR_I(i, element)
> +
> +#define VECTOR_FOR_I(index, element)                                    \
> +  for (index = 0; index < N_ELEMS(element); index++)
> +
> +#if defined(WORDS_BIGENDIAN)
> +#define VECTOR_FOR_INORDER_I(index, element) VECTOR_FOR_I(index, element)
> +#else
> +#define VECTOR_FOR_INORDER_I(index, element)            \
> +  for (index = N_ELEMS(element)-1; index >= 0; index--)
> +#endif
> +
> +#undef VECTOR_FOR
> +#undef VECTOR_FOR_I
> +#undef VECTOR_FOR_INORDER_I
> +#undef N_ELEMS
> +#undef HI_IDX
> +#undef LO_IDX
> +
> +/*****************************************************************************/
>  /* SPE extension helpers */
>  /* Use a table to make this quicker */
>  static uint8_t hbrev[16] = {

While I have nothing against those macros, I know some code like that
has already been rejected in the past.

If someone disagrees with this code, please shout *now* before I apply it
to the SVN.

-- 
  .''`.  Aurelien Jarno	            | GPG: 1024D/F1BCDB73
 : :' :  Debian developer           | Electrical Engineer
 `. `'   aurel32@debian.org         | aurelien@aurel32.net
   `-    people.debian.org/~aurel32 | www.aurel32.net