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| author | Jean-Marc Valin <jmvalin@jmvalin.ca> | 2014-01-21 16:23:24 -0500 |
|---|---|---|
| committer | Jean-Marc Valin <jmvalin@jmvalin.ca> | 2014-01-21 16:23:24 -0500 |
| commit | 9b3a3ad7ff3db7f43640be02faa0f869ecff5b99 (patch) | |
| tree | 2764559f32d6618e8edd11315b368957973adff7 | |
| parent | 6218cba258ae3e29af08253bebe46cfea3c3d39b (diff) | |
| download | opus-9b3a3ad7ff3db7f43640be02faa0f869ecff5b99.tar.gz | |
Unrolled version of the comb filter for ARM (eliminates MOVs)
| -rw-r--r-- | celt/celt.c | 34 |
1 files changed, 32 insertions, 2 deletions
diff --git a/celt/celt.c b/celt/celt.c index 5741b6b5..b67c2d3d 100644 --- a/celt/celt.c +++ b/celt/celt.c @@ -97,7 +97,37 @@ static void comb_filter_const(opus_val32 *y, opus_val32 *x, int T, int N, x3 = SHL32(x[-T-1], 1); x2 = SHL32(x[-T], 1); x1 = SHL32(x[-T+1], 1); - for (i=0;i<N;i++) + for (i=0;i<N-4;i+=5) + { + opus_val32 t; + x0=SHL32(x[i-T+2],1); + t = MAC16_32_Q16(x[i], g10, x2); + t = MAC16_32_Q16(t, g11, ADD32(x1,x3)); + t = MAC16_32_Q16(t, g12, ADD32(x0,x4)); + y[i] = t; + x4=SHL32(x[i-T+3],1); + t = MAC16_32_Q16(x[i+1], g10, x1); + t = MAC16_32_Q16(t, g11, ADD32(x0,x2)); + t = MAC16_32_Q16(t, g12, ADD32(x4,x3)); + y[i+1] = t; + x3=SHL32(x[i-T+4],1); + t = MAC16_32_Q16(x[i+2], g10, x0); + t = MAC16_32_Q16(t, g11, ADD32(x4,x1)); + t = MAC16_32_Q16(t, g12, ADD32(x3,x2)); + y[i+2] = t; + x2=SHL32(x[i-T+5],1); + t = MAC16_32_Q16(x[i+3], g10, x4); + t = MAC16_32_Q16(t, g11, ADD32(x3,x0)); + t = MAC16_32_Q16(t, g12, ADD32(x2,x1)); + y[i+3] = t; + x1=SHL32(x[i-T+6],1); + t = MAC16_32_Q16(x[i+4], g10, x3); + t = MAC16_32_Q16(t, g11, ADD32(x2,x4)); + t = MAC16_32_Q16(t, g12, ADD32(x1,x0)); + y[i+4] = t; + } +#ifdef CUSTOM_MODES + for (;i<N;i++) { opus_val32 t; x0=SHL32(x[i-T+2],1); @@ -110,7 +140,7 @@ static void comb_filter_const(opus_val32 *y, opus_val32 *x, int T, int N, x2=x1; x1=x0; } - +#endif } #else static void comb_filter_const(opus_val32 *y, opus_val32 *x, int T, int N, |