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x86: lpc: simd av_update_lls

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4x-6x faster on sandybridge

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
This commit is contained in:
Loren Merritt
2013-06-18 21:30:42 +00:00
committed by Luca Barbato
parent 41578f70cf
commit 502ab21af0
6 changed files with 253 additions and 7 deletions
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4
libavcodec/lpc.c
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@@ -200,7 +200,9 @@ int ff_lpc_calc_coefs(LPCContext *s,
ref[i] = fabs(lpc[i][i]);
} else if (lpc_type == FF_LPC_TYPE_CHOLESKY) {
LLSModel m[2];
double var[MAX_LPC_ORDER+1], av_uninit(weight);
LOCAL_ALIGNED(32, double, var, [FFALIGN(MAX_LPC_ORDER+1,4)]);
double av_uninit(weight);
memset(var, 0, FFALIGN(MAX_LPC_ORDER+1,4)*sizeof(*var));
for(pass=0; pass<lpc_passes; pass++){
avpriv_init_lls(&m[pass&1], max_order);