Merge pull request #2061 from phire/make-things-better
Cleanup DotProduct function to make it more readable.
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commit
0148deb78c
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@ -39,21 +39,25 @@ static float *filter_coefs_lfe;
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static unsigned int len125;
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template<class T, class _ftype_t>
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static _ftype_t DotProduct(int count,const T *buf,const _ftype_t *coefficients)
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static _ftype_t DotProduct(int count, const T *buf, const _ftype_t *coefficients)
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{
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float sum0=0,sum1=0,sum2=0,sum3=0;
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for (;count>=4;buf+=4,coefficients+=4,count-=4)
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int i;
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float sum0 = 0.0f, sum1 = 0.0f, sum2 = 0.0f, sum3 = 0.0f;
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// Unrolled loop
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for (i = 0; (i + 3) < count; i += 4)
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{
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sum0+=buf[0]*coefficients[0];
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sum1+=buf[1]*coefficients[1];
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sum2+=buf[2]*coefficients[2];
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sum3+=buf[3]*coefficients[3];
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sum0 += buf[i + 0] * coefficients[i + 0];
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sum1 += buf[i + 1] * coefficients[i + 1];
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sum2 += buf[i + 2] * coefficients[i + 2];
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sum3 += buf[i + 3] * coefficients[i + 3];
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}
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while (count--)
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sum0+= *buf++ * *coefficients++;
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// Epilogue of unrolled loop
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for (; i < count; i++)
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sum0 += buf[i] * coefficients[i];
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return sum0+sum1+sum2+sum3;
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return sum0 + sum1 + sum2 + sum3;
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}
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template<class T>
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