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volk_sse3_intrinsics.h
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/* -*- c++ -*- */
/*
* Copyright 2015 Free Software Foundation, Inc.
*
* This file is part of VOLK
*
* SPDX-License-Identifier: LGPL-3.0-or-later
*/
/*
* This file is intended to hold SSE3 intrinsics of intrinsics.
* They should be used in VOLK kernels to avoid copy-pasta.
*/
#ifndef INCLUDE_VOLK_VOLK_SSE3_INTRINSICS_H_
#define INCLUDE_VOLK_VOLK_SSE3_INTRINSICS_H_
#include <pmmintrin.h>
static inline __m128 _mm_complexmul_ps(__m128 x, __m128 y)
{
__m128 yl, yh, tmp1, tmp2;
yl = _mm_moveldup_ps(y); // Load yl with cr,cr,dr,dr
yh = _mm_movehdup_ps(y); // Load yh with ci,ci,di,di
tmp1 = _mm_mul_ps(x, yl); // tmp1 = ar*cr,ai*cr,br*dr,bi*dr
x = _mm_shuffle_ps(x, x, 0xB1); // Re-arrange x to be ai,ar,bi,br
tmp2 = _mm_mul_ps(x, yh); // tmp2 = ai*ci,ar*ci,bi*di,br*di
return _mm_addsub_ps(tmp1,
tmp2); // ar*cr-ai*ci, ai*cr+ar*ci, br*dr-bi*di, bi*dr+br*di
}
static inline __m128 _mm_complexconjugatemul_ps(__m128 x, __m128 y)
{
const __m128 conjugator = _mm_setr_ps(0, -0.f, 0, -0.f);
y = _mm_xor_ps(y, conjugator); // conjugate y
return _mm_complexmul_ps(x, y);
}
static inline __m128 _mm_magnitudesquared_ps_sse3(__m128 cplxValue1, __m128 cplxValue2)
{
cplxValue1 = _mm_mul_ps(cplxValue1, cplxValue1); // Square the values
cplxValue2 = _mm_mul_ps(cplxValue2, cplxValue2); // Square the Values
return _mm_hadd_ps(cplxValue1, cplxValue2); // Add the I2 and Q2 values
}
static inline __m128 _mm_magnitude_ps_sse3(__m128 cplxValue1, __m128 cplxValue2)
{
return _mm_sqrt_ps(_mm_magnitudesquared_ps_sse3(cplxValue1, cplxValue2));
}
static inline __m128 _mm_scaled_norm_dist_ps_sse3(const __m128 symbols0,
const __m128 symbols1,
const __m128 points0,
const __m128 points1,
const __m128 scalar)
{
/*
* Calculate: |y - x|^2 * SNR_lin
* Consider 'symbolsX' and 'pointsX' to be complex float
* 'symbolsX' are 'y' and 'pointsX' are 'x'
*/
const __m128 diff0 = _mm_sub_ps(symbols0, points0);
const __m128 diff1 = _mm_sub_ps(symbols1, points1);
const __m128 norms = _mm_magnitudesquared_ps_sse3(diff0, diff1);
return _mm_mul_ps(norms, scalar);
}
#endif /* INCLUDE_VOLK_VOLK_SSE3_INTRINSICS_H_ */