Vector Optimized Library of Kernels  2.3
Architecture-tuned implementations of math kernels
volk_32f_sqrt_32f.h
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22 
65 #ifndef INCLUDED_volk_32f_sqrt_32f_a_H
66 #define INCLUDED_volk_32f_sqrt_32f_a_H
67 
68 #include <inttypes.h>
69 #include <math.h>
70 #include <stdio.h>
71 
72 #ifdef LV_HAVE_SSE
73 #include <xmmintrin.h>
74 
75 static inline void
76 volk_32f_sqrt_32f_a_sse(float* cVector, const float* aVector, unsigned int num_points)
77 {
78  unsigned int number = 0;
79  const unsigned int quarterPoints = num_points / 4;
80 
81  float* cPtr = cVector;
82  const float* aPtr = aVector;
83 
84  __m128 aVal, cVal;
85  for (; number < quarterPoints; number++) {
86  aVal = _mm_load_ps(aPtr);
87 
88  cVal = _mm_sqrt_ps(aVal);
89 
90  _mm_store_ps(cPtr, cVal); // Store the results back into the C container
91 
92  aPtr += 4;
93  cPtr += 4;
94  }
95 
96  number = quarterPoints * 4;
97  for (; number < num_points; number++) {
98  *cPtr++ = sqrtf(*aPtr++);
99  }
100 }
101 
102 #endif /* LV_HAVE_SSE */
103 
104 #ifdef LV_HAVE_AVX
105 #include <immintrin.h>
106 
107 static inline void
108 volk_32f_sqrt_32f_a_avx(float* cVector, const float* aVector, unsigned int num_points)
109 {
110  unsigned int number = 0;
111  const unsigned int eighthPoints = num_points / 8;
112 
113  float* cPtr = cVector;
114  const float* aPtr = aVector;
115 
116  __m256 aVal, cVal;
117  for (; number < eighthPoints; number++) {
118  aVal = _mm256_load_ps(aPtr);
119 
120  cVal = _mm256_sqrt_ps(aVal);
121 
122  _mm256_store_ps(cPtr, cVal); // Store the results back into the C container
123 
124  aPtr += 8;
125  cPtr += 8;
126  }
127 
128  number = eighthPoints * 8;
129  for (; number < num_points; number++) {
130  *cPtr++ = sqrtf(*aPtr++);
131  }
132 }
133 
134 #endif /* LV_HAVE_AVX */
135 
136 
137 #ifdef LV_HAVE_NEON
138 #include <arm_neon.h>
139 
140 static inline void
141 volk_32f_sqrt_32f_neon(float* cVector, const float* aVector, unsigned int num_points)
142 {
143  float* cPtr = cVector;
144  const float* aPtr = aVector;
145  unsigned int number = 0;
146  unsigned int quarter_points = num_points / 4;
147  float32x4_t in_vec, out_vec;
148 
149  for (number = 0; number < quarter_points; number++) {
150  in_vec = vld1q_f32(aPtr);
151  // note that armv8 has vsqrt_f32 which will be much better
152  out_vec = vrecpeq_f32(vrsqrteq_f32(in_vec));
153  vst1q_f32(cPtr, out_vec);
154  aPtr += 4;
155  cPtr += 4;
156  }
157 
158  for (number = quarter_points * 4; number < num_points; number++) {
159  *cPtr++ = sqrtf(*aPtr++);
160  }
161 }
162 
163 #endif /* LV_HAVE_NEON */
164 
165 
166 #ifdef LV_HAVE_GENERIC
167 
168 static inline void
169 volk_32f_sqrt_32f_generic(float* cVector, const float* aVector, unsigned int num_points)
170 {
171  float* cPtr = cVector;
172  const float* aPtr = aVector;
173  unsigned int number = 0;
174 
175  for (number = 0; number < num_points; number++) {
176  *cPtr++ = sqrtf(*aPtr++);
177  }
178 }
179 
180 #endif /* LV_HAVE_GENERIC */
181 
182 
183 #ifdef LV_HAVE_ORC
184 
185 extern void volk_32f_sqrt_32f_a_orc_impl(float*, const float*, unsigned int);
186 
187 static inline void
188 volk_32f_sqrt_32f_u_orc(float* cVector, const float* aVector, unsigned int num_points)
189 {
190  volk_32f_sqrt_32f_a_orc_impl(cVector, aVector, num_points);
191 }
192 
193 #endif /* LV_HAVE_ORC */
194 
195 #endif /* INCLUDED_volk_32f_sqrt_32f_a_H */
196 
197 #ifndef INCLUDED_volk_32f_sqrt_32f_u_H
198 #define INCLUDED_volk_32f_sqrt_32f_u_H
199 
200 #include <inttypes.h>
201 #include <math.h>
202 #include <stdio.h>
203 #ifdef LV_HAVE_AVX
204 #include <immintrin.h>
205 
206 static inline void
207 volk_32f_sqrt_32f_u_avx(float* cVector, const float* aVector, unsigned int num_points)
208 {
209  unsigned int number = 0;
210  const unsigned int eighthPoints = num_points / 8;
211 
212  float* cPtr = cVector;
213  const float* aPtr = aVector;
214 
215  __m256 aVal, cVal;
216  for (; number < eighthPoints; number++) {
217  aVal = _mm256_loadu_ps(aPtr);
218 
219  cVal = _mm256_sqrt_ps(aVal);
220 
221  _mm256_storeu_ps(cPtr, cVal); // Store the results back into the C container
222 
223  aPtr += 8;
224  cPtr += 8;
225  }
226 
227  number = eighthPoints * 8;
228  for (; number < num_points; number++) {
229  *cPtr++ = sqrtf(*aPtr++);
230  }
231 }
232 
233 #endif /* LV_HAVE_AVX */
234 #endif /* INCLUDED_volk_32f_sqrt_32f_u_H */
volk_32f_sqrt_32f_a_avx
static void volk_32f_sqrt_32f_a_avx(float *cVector, const float *aVector, unsigned int num_points)
Definition: volk_32f_sqrt_32f.h:108
volk_32f_sqrt_32f_u_avx
static void volk_32f_sqrt_32f_u_avx(float *cVector, const float *aVector, unsigned int num_points)
Definition: volk_32f_sqrt_32f.h:207
volk_32f_sqrt_32f_a_sse
static void volk_32f_sqrt_32f_a_sse(float *cVector, const float *aVector, unsigned int num_points)
Definition: volk_32f_sqrt_32f.h:76
volk_32f_sqrt_32f_neon
static void volk_32f_sqrt_32f_neon(float *cVector, const float *aVector, unsigned int num_points)
Definition: volk_32f_sqrt_32f.h:141
volk_32f_sqrt_32f_generic
static void volk_32f_sqrt_32f_generic(float *cVector, const float *aVector, unsigned int num_points)
Definition: volk_32f_sqrt_32f.h:169