[FFmpeg-devel] [PATCH] Altivec-optimized MP3 windowing

[Luca Barbato]

On 07/01/2010 09:44 PM, Vitor Sessak wrote:
> $subj, I know very little about altivec, so comments are very welcome.
> 
> -Vitor

+    const vector float *win1a = (const vector float *) win1;
+    const vector float *win2a = (const vector float *) win2;
+    const vector float *bufa  = (const vector float *) buf;
+    vector float *sum1a = (vector float *) sum1;
+    vector float *sum2a = (vector float *) sum2;

There are guarantees about alignment?

vec_ld takes any pointer as argument iirc.

+        v0 = vec_xor(v0, v0);
+        v4 = vec_xor(v4, v4);

altivec has 32 registers, use them =)

Beside that nothing seems particularly wrong after a quick glance =)

lu

-- 

Luca Barbato
Gentoo/linux
http://dev.gentoo.org/~lu_zero