[FFmpeg-devel] [PATCH] x86: hevc_mc: better register allocation

[Michael Niedermayer]

On Sun, May 18, 2014 at 04:57:15PM +0200, Christophe Gisquet wrote:
> Hi,
> 
> 2014-05-18 15:31 GMT+02:00 Michael Niedermayer <michaelni at gmx.at>:
> > did you intend to attach a patch to this mail ? because i dont see
> > an attachment
> 
> woops.
> 
> -- 
> Christophe

>  hevc_mc.asm |   79 ++++++++++++++++++++++++++++++++++++------------------------
>  1 file changed, 48 insertions(+), 31 deletions(-)
> 410e0e7a2a7ec3cdf400dd7ed879c49fab832d49  0001-x86-hevc_mc-better-register-allocation.patch
> From ce3488687be0dcd5a07a40831910ccfa63097754 Mon Sep 17 00:00:00 2001
> From: Christophe Gisquet <christophe.gisquet at gmail.com>
> Date: Sat, 17 May 2014 12:22:39 +0200
> Subject: [PATCH 1/2] x86: hevc_mc: better register allocation
> 
> The xmm reg count was incorrect, and manual loading of the gprs
> furthermore allows to noticeable reduce the number needed.
> 
> The modified functions are used in weighted prediction, so only a
> few samples like WP_* exhibit a change. For this one and Win64
> (some widths removed because of too few occurrences):
> 
> WP_A_Toshiba_3.bit, ff_hevc_put_hevc_uni_w
>          16    32
> before: 2194  3872
> after:  2119  3767
> 
> WP_B_Toshiba_3.bit, ff_hevc_put_hevc_bi_w
>          16    32    64
> before: 2819  4960  9396
> after:  2617  4788  9150
> ---
>  libavcodec/x86/hevc_mc.asm | 79 ++++++++++++++++++++++++++++------------------
>  1 file changed, 48 insertions(+), 31 deletions(-)

hmm, its a bit ugly with the platform ABI ifs but noone else
commenting ...

so applied

thanks

[...]

-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Its not that you shouldnt use gotos but rather that you should write
readable code and code with gotos often but not always is less readable
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