Vector Optimized Library of Kernels  3.1.2
Architecture-tuned implementations of math kernels
volk_8ic_x2_multiply_conjugate_16ic.h
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1 /* -*- c++ -*- */
2 /*
3  * Copyright 2012, 2014 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 #ifndef INCLUDED_volk_8ic_x2_multiply_conjugate_16ic_a_H
11 #define INCLUDED_volk_8ic_x2_multiply_conjugate_16ic_a_H
12 
13 #include <inttypes.h>
14 #include <limits.h>
15 #include <stdio.h>
16 #include <volk/volk_complex.h>
17 
18 #ifdef LV_HAVE_AVX2
19 #include <immintrin.h>
28 static inline void volk_8ic_x2_multiply_conjugate_16ic_a_avx2(lv_16sc_t* cVector,
29  const lv_8sc_t* aVector,
30  const lv_8sc_t* bVector,
31  unsigned int num_points)
32 {
33  unsigned int number = 0;
34  const unsigned int quarterPoints = num_points / 8;
35 
36  __m256i x, y, realz, imagz;
37  lv_16sc_t* c = cVector;
38  const lv_8sc_t* a = aVector;
39  const lv_8sc_t* b = bVector;
40  __m256i conjugateSign =
41  _mm256_set_epi16(-1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1);
42 
43  for (; number < quarterPoints; number++) {
44  // Convert 8 bit values into 16 bit values
45  x = _mm256_cvtepi8_epi16(_mm_load_si128((__m128i*)a));
46  y = _mm256_cvtepi8_epi16(_mm_load_si128((__m128i*)b));
47 
48  // Calculate the ar*cr - ai*(-ci) portions
49  realz = _mm256_madd_epi16(x, y);
50 
51  // Calculate the complex conjugate of the cr + ci j values
52  y = _mm256_sign_epi16(y, conjugateSign);
53 
54  // Shift the order of the cr and ci values
55  y = _mm256_shufflehi_epi16(_mm256_shufflelo_epi16(y, _MM_SHUFFLE(2, 3, 0, 1)),
56  _MM_SHUFFLE(2, 3, 0, 1));
57 
58  // Calculate the ar*(-ci) + cr*(ai)
59  imagz = _mm256_madd_epi16(x, y);
60 
61  // Perform the addition of products
62 
63  _mm256_store_si256((__m256i*)c,
64  _mm256_packs_epi32(_mm256_unpacklo_epi32(realz, imagz),
65  _mm256_unpackhi_epi32(realz, imagz)));
66 
67  a += 8;
68  b += 8;
69  c += 8;
70  }
71 
72  number = quarterPoints * 8;
73  int16_t* c16Ptr = (int16_t*)&cVector[number];
74  int8_t* a8Ptr = (int8_t*)&aVector[number];
75  int8_t* b8Ptr = (int8_t*)&bVector[number];
76  for (; number < num_points; number++) {
77  float aReal = (float)*a8Ptr++;
78  float aImag = (float)*a8Ptr++;
79  lv_32fc_t aVal = lv_cmake(aReal, aImag);
80  float bReal = (float)*b8Ptr++;
81  float bImag = (float)*b8Ptr++;
82  lv_32fc_t bVal = lv_cmake(bReal, -bImag);
83  lv_32fc_t temp = aVal * bVal;
84 
85  *c16Ptr++ = (int16_t)(lv_creal(temp) > SHRT_MAX ? SHRT_MAX : lv_creal(temp));
86  *c16Ptr++ = (int16_t)lv_cimag(temp);
87  }
88 }
89 #endif /* LV_HAVE_AVX2 */
90 
91 
92 #ifdef LV_HAVE_SSE4_1
93 #include <smmintrin.h>
102 static inline void volk_8ic_x2_multiply_conjugate_16ic_a_sse4_1(lv_16sc_t* cVector,
103  const lv_8sc_t* aVector,
104  const lv_8sc_t* bVector,
105  unsigned int num_points)
106 {
107  unsigned int number = 0;
108  const unsigned int quarterPoints = num_points / 4;
109 
110  __m128i x, y, realz, imagz;
111  lv_16sc_t* c = cVector;
112  const lv_8sc_t* a = aVector;
113  const lv_8sc_t* b = bVector;
114  __m128i conjugateSign = _mm_set_epi16(-1, 1, -1, 1, -1, 1, -1, 1);
115 
116  for (; number < quarterPoints; number++) {
117  // Convert into 8 bit values into 16 bit values
118  x = _mm_cvtepi8_epi16(_mm_loadl_epi64((__m128i*)a));
119  y = _mm_cvtepi8_epi16(_mm_loadl_epi64((__m128i*)b));
120 
121  // Calculate the ar*cr - ai*(-ci) portions
122  realz = _mm_madd_epi16(x, y);
123 
124  // Calculate the complex conjugate of the cr + ci j values
125  y = _mm_sign_epi16(y, conjugateSign);
126 
127  // Shift the order of the cr and ci values
128  y = _mm_shufflehi_epi16(_mm_shufflelo_epi16(y, _MM_SHUFFLE(2, 3, 0, 1)),
129  _MM_SHUFFLE(2, 3, 0, 1));
130 
131  // Calculate the ar*(-ci) + cr*(ai)
132  imagz = _mm_madd_epi16(x, y);
133 
134  _mm_store_si128((__m128i*)c,
135  _mm_packs_epi32(_mm_unpacklo_epi32(realz, imagz),
136  _mm_unpackhi_epi32(realz, imagz)));
137 
138  a += 4;
139  b += 4;
140  c += 4;
141  }
142 
143  number = quarterPoints * 4;
144  int16_t* c16Ptr = (int16_t*)&cVector[number];
145  int8_t* a8Ptr = (int8_t*)&aVector[number];
146  int8_t* b8Ptr = (int8_t*)&bVector[number];
147  for (; number < num_points; number++) {
148  float aReal = (float)*a8Ptr++;
149  float aImag = (float)*a8Ptr++;
150  lv_32fc_t aVal = lv_cmake(aReal, aImag);
151  float bReal = (float)*b8Ptr++;
152  float bImag = (float)*b8Ptr++;
153  lv_32fc_t bVal = lv_cmake(bReal, -bImag);
154  lv_32fc_t temp = aVal * bVal;
155 
156  *c16Ptr++ = (int16_t)(lv_creal(temp) > SHRT_MAX ? SHRT_MAX : lv_creal(temp));
157  *c16Ptr++ = (int16_t)lv_cimag(temp);
158  }
159 }
160 #endif /* LV_HAVE_SSE4_1 */
161 
162 #ifdef LV_HAVE_GENERIC
172  const lv_8sc_t* aVector,
173  const lv_8sc_t* bVector,
174  unsigned int num_points)
175 {
176  unsigned int number = 0;
177  int16_t* c16Ptr = (int16_t*)cVector;
178  int8_t* a8Ptr = (int8_t*)aVector;
179  int8_t* b8Ptr = (int8_t*)bVector;
180  for (number = 0; number < num_points; number++) {
181  float aReal = (float)*a8Ptr++;
182  float aImag = (float)*a8Ptr++;
183  lv_32fc_t aVal = lv_cmake(aReal, aImag);
184  float bReal = (float)*b8Ptr++;
185  float bImag = (float)*b8Ptr++;
186  lv_32fc_t bVal = lv_cmake(bReal, -bImag);
187  lv_32fc_t temp = aVal * bVal;
188 
189  *c16Ptr++ = (int16_t)(lv_creal(temp) > SHRT_MAX ? SHRT_MAX : lv_creal(temp));
190  *c16Ptr++ = (int16_t)lv_cimag(temp);
191  }
192 }
193 #endif /* LV_HAVE_GENERIC */
194 
195 #endif /* INCLUDED_volk_8ic_x2_multiply_conjugate_16ic_a_H */
196 
197 #ifndef INCLUDED_volk_8ic_x2_multiply_conjugate_16ic_u_H
198 #define INCLUDED_volk_8ic_x2_multiply_conjugate_16ic_u_H
199 
200 #include <inttypes.h>
201 #include <stdio.h>
202 #include <volk/volk_complex.h>
203 
204 #ifdef LV_HAVE_AVX2
205 #include <immintrin.h>
214 static inline void volk_8ic_x2_multiply_conjugate_16ic_u_avx2(lv_16sc_t* cVector,
215  const lv_8sc_t* aVector,
216  const lv_8sc_t* bVector,
217  unsigned int num_points)
218 {
219  unsigned int number = 0;
220  const unsigned int oneEigthPoints = num_points / 8;
221 
222  __m256i x, y, realz, imagz;
223  lv_16sc_t* c = cVector;
224  const lv_8sc_t* a = aVector;
225  const lv_8sc_t* b = bVector;
226  __m256i conjugateSign =
227  _mm256_set_epi16(-1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1);
228 
229  for (; number < oneEigthPoints; number++) {
230  // Convert 8 bit values into 16 bit values
231  x = _mm256_cvtepi8_epi16(_mm_loadu_si128((__m128i*)a));
232  y = _mm256_cvtepi8_epi16(_mm_loadu_si128((__m128i*)b));
233 
234  // Calculate the ar*cr - ai*(-ci) portions
235  realz = _mm256_madd_epi16(x, y);
236 
237  // Calculate the complex conjugate of the cr + ci j values
238  y = _mm256_sign_epi16(y, conjugateSign);
239 
240  // Shift the order of the cr and ci values
241  y = _mm256_shufflehi_epi16(_mm256_shufflelo_epi16(y, _MM_SHUFFLE(2, 3, 0, 1)),
242  _MM_SHUFFLE(2, 3, 0, 1));
243 
244  // Calculate the ar*(-ci) + cr*(ai)
245  imagz = _mm256_madd_epi16(x, y);
246 
247  // Perform the addition of products
248 
249  _mm256_storeu_si256((__m256i*)c,
250  _mm256_packs_epi32(_mm256_unpacklo_epi32(realz, imagz),
251  _mm256_unpackhi_epi32(realz, imagz)));
252 
253  a += 8;
254  b += 8;
255  c += 8;
256  }
257 
258  number = oneEigthPoints * 8;
259  int16_t* c16Ptr = (int16_t*)&cVector[number];
260  int8_t* a8Ptr = (int8_t*)&aVector[number];
261  int8_t* b8Ptr = (int8_t*)&bVector[number];
262  for (; number < num_points; number++) {
263  float aReal = (float)*a8Ptr++;
264  float aImag = (float)*a8Ptr++;
265  lv_32fc_t aVal = lv_cmake(aReal, aImag);
266  float bReal = (float)*b8Ptr++;
267  float bImag = (float)*b8Ptr++;
268  lv_32fc_t bVal = lv_cmake(bReal, -bImag);
269  lv_32fc_t temp = aVal * bVal;
270 
271  *c16Ptr++ = (int16_t)(lv_creal(temp) > SHRT_MAX ? SHRT_MAX : lv_creal(temp));
272  *c16Ptr++ = (int16_t)lv_cimag(temp);
273  }
274 }
275 #endif /* LV_HAVE_AVX2 */
276 
277 #endif /* INCLUDED_volk_8ic_x2_multiply_conjugate_16ic_u_H */
static void volk_8ic_x2_multiply_conjugate_16ic_generic(lv_16sc_t *cVector, const lv_8sc_t *aVector, const lv_8sc_t *bVector, unsigned int num_points)
Multiplys the one complex vector with the complex conjugate of the second complex vector and stores t...
Definition: volk_8ic_x2_multiply_conjugate_16ic.h:171
#define lv_cimag(x)
Definition: volk_complex.h:98
#define lv_cmake(r, i)
Definition: volk_complex.h:77
char complex lv_8sc_t
Provide typedefs and operators for all complex types in C and C++.
Definition: volk_complex.h:70
#define lv_creal(x)
Definition: volk_complex.h:96
float complex lv_32fc_t
Definition: volk_complex.h:74
short complex lv_16sc_t
Definition: volk_complex.h:71