Vector Optimized Library of Kernels 3.2.0
Architecture-tuned implementations of math kernels
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volk_sse3_intrinsics.h
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1/* -*- c++ -*- */
2/*
3 * Copyright 2015 Free Software Foundation, Inc.
4 *
5 * This file is part of VOLK
6 *
7 * SPDX-License-Identifier: LGPL-3.0-or-later
8 */
9
10/*
11 * This file is intended to hold SSE3 intrinsics of intrinsics.
12 * They should be used in VOLK kernels to avoid copy-pasta.
13 */
14
15#ifndef INCLUDE_VOLK_VOLK_SSE3_INTRINSICS_H_
16#define INCLUDE_VOLK_VOLK_SSE3_INTRINSICS_H_
17#include <pmmintrin.h>
18
19static inline __m128 _mm_complexmul_ps(__m128 x, __m128 y)
20{
21 __m128 yl, yh, tmp1, tmp2;
22 yl = _mm_moveldup_ps(y); // Load yl with cr,cr,dr,dr
23 yh = _mm_movehdup_ps(y); // Load yh with ci,ci,di,di
24 tmp1 = _mm_mul_ps(x, yl); // tmp1 = ar*cr,ai*cr,br*dr,bi*dr
25 x = _mm_shuffle_ps(x, x, 0xB1); // Re-arrange x to be ai,ar,bi,br
26 tmp2 = _mm_mul_ps(x, yh); // tmp2 = ai*ci,ar*ci,bi*di,br*di
27 return _mm_addsub_ps(tmp1,
28 tmp2); // ar*cr-ai*ci, ai*cr+ar*ci, br*dr-bi*di, bi*dr+br*di
29}
30
31static inline __m128 _mm_complexconjugatemul_ps(__m128 x, __m128 y)
32{
33 const __m128 conjugator = _mm_setr_ps(0, -0.f, 0, -0.f);
34 y = _mm_xor_ps(y, conjugator); // conjugate y
35 return _mm_complexmul_ps(x, y);
36}
37
38static inline __m128 _mm_magnitudesquared_ps_sse3(__m128 cplxValue1, __m128 cplxValue2)
39{
40 cplxValue1 = _mm_mul_ps(cplxValue1, cplxValue1); // Square the values
41 cplxValue2 = _mm_mul_ps(cplxValue2, cplxValue2); // Square the Values
42 return _mm_hadd_ps(cplxValue1, cplxValue2); // Add the I2 and Q2 values
43}
44
45static inline __m128 _mm_magnitude_ps_sse3(__m128 cplxValue1, __m128 cplxValue2)
46{
47 return _mm_sqrt_ps(_mm_magnitudesquared_ps_sse3(cplxValue1, cplxValue2));
48}
49
50static inline __m128 _mm_scaled_norm_dist_ps_sse3(const __m128 symbols0,
51 const __m128 symbols1,
52 const __m128 points0,
53 const __m128 points1,
54 const __m128 scalar)
55{
56 /*
57 * Calculate: |y - x|^2 * SNR_lin
58 * Consider 'symbolsX' and 'pointsX' to be complex float
59 * 'symbolsX' are 'y' and 'pointsX' are 'x'
60 */
61 const __m128 diff0 = _mm_sub_ps(symbols0, points0);
62 const __m128 diff1 = _mm_sub_ps(symbols1, points1);
63 const __m128 norms = _mm_magnitudesquared_ps_sse3(diff0, diff1);
64 return _mm_mul_ps(norms, scalar);
65}
66
67#endif /* INCLUDE_VOLK_VOLK_SSE3_INTRINSICS_H_ */
static __m128 _mm_complexmul_ps(__m128 x, __m128 y)
Definition volk_sse3_intrinsics.h:19
static __m128 _mm_magnitude_ps_sse3(__m128 cplxValue1, __m128 cplxValue2)
Definition volk_sse3_intrinsics.h:45
static __m128 _mm_magnitudesquared_ps_sse3(__m128 cplxValue1, __m128 cplxValue2)
Definition volk_sse3_intrinsics.h:38
static __m128 _mm_scaled_norm_dist_ps_sse3(const __m128 symbols0, const __m128 symbols1, const __m128 points0, const __m128 points1, const __m128 scalar)
Definition volk_sse3_intrinsics.h:50
static __m128 _mm_complexconjugatemul_ps(__m128 x, __m128 y)
Definition volk_sse3_intrinsics.h:31