Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2017 ARM Limited. |
| 3 | * |
| 4 | * SPDX-License-Identifier: MIT |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 7 | * of this software and associated documentation files (the "Software"), to |
| 8 | * deal in the Software without restriction, including without limitation the |
| 9 | * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
| 10 | * sell copies of the Software, and to permit persons to whom the Software is |
| 11 | * furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in all |
| 14 | * copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 19 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 22 | * SOFTWARE. |
| 23 | */ |
Georgios Pinitas | 00394ae | 2017-06-22 18:13:55 +0100 | [diff] [blame] | 24 | #include <limits> |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 25 | |
| 26 | namespace arm_compute |
| 27 | { |
Michalis Spyrou | bbd9fb9 | 2017-06-22 12:57:51 +0100 | [diff] [blame] | 28 | /** Exponent polynomial coefficients for 8 bit fixed point (8 elements) |
| 29 | * Format is in Q0.7 for all elements |
| 30 | */ |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 31 | static const std::array<qint8x8_t, 4> exp_tab_qs8 = |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 32 | { |
| 33 | { |
| 34 | vdup_n_s8(0x7F), // 0.9978546 |
| 35 | vdup_n_s8(0x3F), // 0.4994721 |
| 36 | vdup_n_s8(0x16), // 0.1763723 |
| 37 | vdup_n_s8(0x05), // 0.0435108 |
| 38 | } |
| 39 | }; |
| 40 | |
Michalis Spyrou | bbd9fb9 | 2017-06-22 12:57:51 +0100 | [diff] [blame] | 41 | /** Exponent polynomial coefficients for 16 bit fixed point (4 elements) |
| 42 | * Format is in Q0.15 for all elements |
| 43 | */ |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 44 | static const std::array<qint16x4_t, 4> exp_tab_qs16 = |
| 45 | { |
| 46 | { |
| 47 | vdup_n_s16(0x7FBA), // 0.9978546 |
| 48 | vdup_n_s16(0x3FE9), // 0.4994721 |
| 49 | vdup_n_s16(0x1693), // 0.1763723 |
| 50 | vdup_n_s16(0x0592), // 0.0435108 |
| 51 | } |
| 52 | }; |
| 53 | |
Michalis Spyrou | bbd9fb9 | 2017-06-22 12:57:51 +0100 | [diff] [blame] | 54 | /** Exponent polynomial coefficients for 8 bit fixed point (16 elements) |
| 55 | * Format is in Q0.7 for all elements |
| 56 | */ |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 57 | static const std::array<qint8x16_t, 4> exp_tabq_qs8 = |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 58 | { |
| 59 | { |
| 60 | vdupq_n_s8(0x7F), // 0.9978546 |
| 61 | vdupq_n_s8(0x3F), // 0.4994721 |
| 62 | vdupq_n_s8(0x16), // 0.1763723 |
| 63 | vdupq_n_s8(0x05), // 0.0435108 |
| 64 | } |
| 65 | }; |
| 66 | |
Michalis Spyrou | bbd9fb9 | 2017-06-22 12:57:51 +0100 | [diff] [blame] | 67 | /** Exponent polynomial coefficients for 16 bit fixed point (8 elements) |
| 68 | * Format is in Q0.15 for all elements |
| 69 | */ |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 70 | static const std::array<qint16x8_t, 4> exp_tabq_qs16 = |
| 71 | { |
| 72 | { |
| 73 | vdupq_n_s16(0x7FBA), // 0.9978546 |
| 74 | vdupq_n_s16(0x3FE9), // 0.4994721 |
| 75 | vdupq_n_s16(0x1693), // 0.1763723 |
| 76 | vdupq_n_s16(0x0592), // 0.0435108 |
| 77 | } |
| 78 | }; |
| 79 | |
Michalis Spyrou | bbd9fb9 | 2017-06-22 12:57:51 +0100 | [diff] [blame] | 80 | /** Logarithm polynomial coefficients for 8 bit fixed point (8 elements) |
| 81 | * Format is in Q0.7 for all elements except the first one which is in Q1.6 |
| 82 | */ |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 83 | static const std::array<qint8x8_t, 4> log_tab_qs8 = |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 84 | { |
| 85 | { |
| 86 | vdup_n_s8(0x5C), // 1.4384189 |
| 87 | vdup_n_s8(-0x56), // -0.6771900 |
| 88 | vdup_n_s8(0x29), // 0.3218538 |
| 89 | vdup_n_s8(-0x0A), // -0.0832229 |
| 90 | } |
| 91 | }; |
| 92 | |
Michalis Spyrou | bbd9fb9 | 2017-06-22 12:57:51 +0100 | [diff] [blame] | 93 | /** Logarithm polynomial coefficients for 16 bit fixed point (8 elements) |
| 94 | * Format is in Q0.15 for all elements except the first one which is in Q1.14 |
| 95 | */ |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 96 | static const std::array<qint16x4_t, 4> log_tab_qs16 = |
| 97 | { |
| 98 | { |
| 99 | vdup_n_s16(0x5C0F), // 1.4384189 |
| 100 | vdup_n_s16(-0x56AE), // -0.6771900 |
| 101 | vdup_n_s16(0x2933), // 0.3218538 |
| 102 | vdup_n_s16(-0x0AA7), // -0.0832229 |
| 103 | } |
| 104 | }; |
| 105 | |
Michalis Spyrou | bbd9fb9 | 2017-06-22 12:57:51 +0100 | [diff] [blame] | 106 | /** Logarithm polynomial coefficients for 8 bit fixed point (16 elements) |
| 107 | * Format is in Q0.7 for all elements except the first one which is in Q1.6 |
| 108 | */ |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 109 | static const std::array<qint8x16_t, 4> log_tabq_qs8 = |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 110 | { |
| 111 | { |
| 112 | vdupq_n_s8(0x5C), // 1.4384189 |
| 113 | vdupq_n_s8(-0x56), // -0.6771900 |
| 114 | vdupq_n_s8(0x29), // 0.3218538 |
| 115 | vdupq_n_s8(-0x0A), // -0.0832229 |
| 116 | } |
| 117 | }; |
| 118 | |
Michalis Spyrou | bbd9fb9 | 2017-06-22 12:57:51 +0100 | [diff] [blame] | 119 | /** Logarithm polynomial coefficients for 16 bit fixed point (8 elements) |
| 120 | * Format is in Q0.15 for all elements except the first one which is in Q1.14 |
| 121 | */ |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 122 | static const std::array<qint16x8_t, 4> log_tabq_qs16 = |
| 123 | { |
| 124 | { |
| 125 | vdupq_n_s16(0x5C0F), // 1.4384189 |
| 126 | vdupq_n_s16(-0x56AE), // -0.6771900 |
| 127 | vdupq_n_s16(0x2933), // 0.3218538 |
| 128 | vdupq_n_s16(-0x0AA7), // -0.0832229 |
| 129 | } |
| 130 | }; |
| 131 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 132 | inline qint8x8_t vget_low_qs8(qint8x16_t a) |
| 133 | { |
| 134 | return vget_low_s8(a); |
| 135 | } |
| 136 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 137 | inline qint16x4_t vget_low_qs16(qint16x8_t a) |
| 138 | { |
| 139 | return vget_low_s16(a); |
| 140 | } |
| 141 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 142 | inline qint8x8_t vget_high_qs8(qint8x16_t a) |
| 143 | { |
| 144 | return vget_high_s8(a); |
| 145 | } |
| 146 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 147 | inline qint16x4_t vget_high_qs16(qint16x8_t a) |
| 148 | { |
| 149 | return vget_high_s16(a); |
| 150 | } |
| 151 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 152 | inline qint8x8_t vld1_qs8(const qint8_t *addr) |
| 153 | { |
| 154 | return vld1_s8(addr); |
| 155 | } |
| 156 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 157 | inline qint16x4_t vld1_qs16(const qint16_t *addr) |
| 158 | { |
| 159 | return vld1_s16(addr); |
| 160 | } |
| 161 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 162 | inline qint8x16_t vld1q_qs8(const qint8_t *addr) |
| 163 | { |
| 164 | return vld1q_s8(addr); |
| 165 | } |
| 166 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 167 | inline qint16x8_t vld1q_qs16(const qint16_t *addr) |
| 168 | { |
| 169 | return vld1q_s16(addr); |
| 170 | } |
| 171 | |
| 172 | inline qint8x8_t vld1_dup_qs8(const qint8_t *addr) |
| 173 | { |
| 174 | return vld1_dup_s8(addr); |
| 175 | } |
| 176 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 177 | inline qint16x4_t vld1_dup_qs16(const qint16_t *addr) |
| 178 | { |
| 179 | return vld1_dup_s16(addr); |
| 180 | } |
| 181 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 182 | inline qint8x16_t vld1q_dup_qs8(const qint8_t *addr) |
| 183 | { |
| 184 | return vld1q_dup_s8(addr); |
| 185 | } |
| 186 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 187 | inline qint16x8_t vld1q_dup_qs16(const qint16_t *addr) |
| 188 | { |
| 189 | return vld1q_dup_s16(addr); |
| 190 | } |
| 191 | |
Michele Di Giorgio | 81f0d15 | 2017-07-11 15:00:52 +0100 | [diff] [blame] | 192 | inline qint16x8x2_t vld2q_qs16(const qint16_t *addr) |
| 193 | { |
| 194 | return vld2q_s16(addr); |
| 195 | } |
| 196 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 197 | inline void vst1_qs8(qint8_t *addr, qint8x8_t b) |
| 198 | { |
| 199 | vst1_s8(addr, b); |
| 200 | } |
| 201 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 202 | inline void vst1_qs16(qint16_t *addr, qint16x4_t b) |
| 203 | { |
| 204 | vst1_s16(addr, b); |
| 205 | } |
| 206 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 207 | inline void vst1q_qs8(qint8_t *addr, qint8x16_t b) |
| 208 | { |
| 209 | vst1q_s8(addr, b); |
| 210 | } |
| 211 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 212 | inline void vst1q_qs16(qint16_t *addr, qint16x8_t b) |
| 213 | { |
| 214 | vst1q_s16(addr, b); |
| 215 | } |
| 216 | |
Georgios Pinitas | ccc65d4 | 2017-06-27 17:39:11 +0100 | [diff] [blame] | 217 | inline void vst2q_qs16(qint16_t *addr, qint16x8x2_t b) |
| 218 | { |
| 219 | vst2q_s16(addr, b); |
| 220 | } |
| 221 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 222 | inline qint8x8_t vqmovn_qs16(qint16x8_t a) |
| 223 | { |
| 224 | return vqmovn_s16(a); |
| 225 | } |
| 226 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 227 | inline qint16x4_t vqmovn_qs32(qint32x4_t a) |
| 228 | { |
| 229 | return vqmovn_s32(a); |
| 230 | } |
| 231 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 232 | inline qint8x8_t vdup_n_qs8(qint8_t a) |
| 233 | { |
| 234 | return vdup_n_s8(a); |
| 235 | } |
| 236 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 237 | inline qint16x4_t vdup_n_qs16(qint16_t a) |
| 238 | { |
| 239 | return vdup_n_s16(a); |
| 240 | } |
| 241 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 242 | inline qint8x16_t vdupq_n_qs8(qint8_t a) |
| 243 | { |
| 244 | return vdupq_n_s8(a); |
| 245 | } |
| 246 | |
| 247 | inline qint8x16_t vdupq_n_qs8_f32(float a, int fixed_point_position) |
| 248 | { |
| 249 | float32x4x4_t res = |
| 250 | { |
| 251 | { |
| 252 | vdupq_n_f32(a), |
| 253 | vdupq_n_f32(a), |
| 254 | vdupq_n_f32(a), |
| 255 | vdupq_n_f32(a), |
| 256 | } |
| 257 | }; |
Georgios Pinitas | 21efeb4 | 2017-07-04 12:47:17 +0100 | [diff] [blame] | 258 | return vqcvtq_qs8_f32(res, fixed_point_position); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 259 | } |
| 260 | |
Michele Di Giorgio | d5e65c7 | 2017-07-26 17:09:17 +0100 | [diff] [blame] | 261 | inline qint16x8_t vdupq_n_qs16_f32(float a, int fixed_point_position) |
| 262 | { |
| 263 | float32x4x2_t res = |
| 264 | { |
| 265 | { |
| 266 | vdupq_n_f32(a), |
| 267 | vdupq_n_f32(a), |
| 268 | } |
| 269 | }; |
| 270 | return vqcvtq_qs16_f32(res, fixed_point_position); |
| 271 | } |
| 272 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 273 | inline qint16x8_t vdupq_n_qs16(qint16_t a) |
| 274 | { |
| 275 | return vdupq_n_s16(a); |
| 276 | } |
| 277 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 278 | inline qint32x4_t vdupq_n_qs32(qint32_t a) |
| 279 | { |
| 280 | return vdupq_n_s32(a); |
| 281 | } |
| 282 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 283 | inline qint8x8_t vabs_qs8(qint8x8_t a) |
| 284 | { |
| 285 | return vabs_s8(a); |
| 286 | } |
| 287 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 288 | inline qint16x4_t vabs_qs16(qint16x4_t a) |
| 289 | { |
| 290 | return vabs_s16(a); |
| 291 | } |
| 292 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 293 | inline qint8x16_t vabsq_qs8(qint8x16_t a) |
| 294 | { |
| 295 | return vabsq_s8(a); |
| 296 | } |
| 297 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 298 | inline qint16x8_t vabsq_qs16(qint16x8_t a) |
| 299 | { |
| 300 | return vabsq_s16(a); |
| 301 | } |
| 302 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 303 | inline qint8x8_t vqabs_qs8(qint8x8_t a) |
| 304 | { |
| 305 | return vqabs_s8(a); |
| 306 | } |
| 307 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 308 | inline qint16x4_t vqabs_qs16(qint16x4_t a) |
| 309 | { |
| 310 | return vqabs_s16(a); |
| 311 | } |
| 312 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 313 | inline qint8x16_t vqabsq_qs8(qint8x16_t a) |
| 314 | { |
| 315 | return vqabsq_s8(a); |
| 316 | } |
| 317 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 318 | inline qint16x8_t vqabsq_qs16(qint16x8_t a) |
| 319 | { |
| 320 | return vqabsq_s16(a); |
| 321 | } |
| 322 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 323 | inline qint8x8_t vmax_qs8(qint8x8_t a, qint8x8_t b) |
| 324 | { |
| 325 | return vmax_s8(a, b); |
| 326 | } |
| 327 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 328 | inline qint16x4_t vmax_qs16(qint16x4_t a, qint16x4_t b) |
| 329 | { |
| 330 | return vmax_s16(a, b); |
| 331 | } |
| 332 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 333 | inline qint8x16_t vmaxq_qs8(qint8x16_t a, qint8x16_t b) |
| 334 | { |
| 335 | return vmaxq_s8(a, b); |
| 336 | } |
| 337 | |
| 338 | inline qint8x8_t vpmax_qs8(qint8x8_t a, qint8x8_t b) |
| 339 | { |
| 340 | return vpmax_s8(a, b); |
| 341 | } |
| 342 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 343 | inline qint16x4_t vpmax_qs16(qint16x4_t a, qint16x4_t b) |
| 344 | { |
| 345 | return vpmax_s16(a, b); |
| 346 | } |
| 347 | |
| 348 | inline qint16x8_t vmaxq_qs16(qint16x8_t a, qint16x8_t b) |
| 349 | { |
| 350 | return vmaxq_s16(a, b); |
| 351 | } |
| 352 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 353 | inline qint8x8_t vmin_qs8(qint8x8_t a, qint8x8_t b) |
| 354 | { |
| 355 | return vmin_s8(a, b); |
| 356 | } |
| 357 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 358 | inline qint16x4_t vmin_qs16(qint16x4_t a, qint16x4_t b) |
| 359 | { |
| 360 | return vmin_s16(a, b); |
| 361 | } |
| 362 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 363 | inline qint8x16_t vminq_qs8(qint8x16_t a, qint8x16_t b) |
| 364 | { |
| 365 | return vminq_s8(a, b); |
| 366 | } |
| 367 | |
| 368 | inline qint8x8_t vpmin_qs8(qint8x8_t a, qint8x8_t b) |
| 369 | { |
| 370 | return vpmin_s8(a, b); |
| 371 | } |
| 372 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 373 | inline qint16x4_t vpmin_qs16(qint16x4_t a, qint16x4_t b) |
| 374 | { |
| 375 | return vpmin_s16(a, b); |
| 376 | } |
| 377 | |
| 378 | inline qint16x8_t vminq_qs16(qint16x8_t a, qint16x8_t b) |
| 379 | { |
| 380 | return vminq_s16(a, b); |
| 381 | } |
| 382 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 383 | inline qint8x8_t vadd_qs8(qint8x8_t a, qint8x8_t b) |
| 384 | { |
| 385 | return vadd_s8(a, b); |
| 386 | } |
| 387 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 388 | inline qint16x4_t vadd_qs16(qint16x4_t a, qint16x4_t b) |
| 389 | { |
| 390 | return vadd_s16(a, b); |
| 391 | } |
| 392 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 393 | inline qint8x16_t vaddq_qs8(qint8x16_t a, qint8x16_t b) |
| 394 | { |
| 395 | return vaddq_s8(a, b); |
| 396 | } |
| 397 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 398 | inline qint16x8_t vaddq_qs16(qint16x8_t a, qint16x8_t b) |
| 399 | { |
| 400 | return vaddq_s16(a, b); |
| 401 | } |
| 402 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 403 | inline qint8x8_t vqadd_qs8(qint8x8_t a, qint8x8_t b) |
| 404 | { |
| 405 | return vqadd_s8(a, b); |
| 406 | } |
| 407 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 408 | inline qint16x4_t vqadd_qs16(qint16x4_t a, qint16x4_t b) |
| 409 | { |
| 410 | return vqadd_s16(a, b); |
| 411 | } |
| 412 | |
Georgios Pinitas | 9247c92 | 2017-06-28 18:29:47 +0100 | [diff] [blame] | 413 | inline qint32x2_t vqadd_qs32(qint32x2_t a, qint32x2_t b) |
| 414 | { |
| 415 | return vqadd_s32(a, b); |
| 416 | } |
| 417 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 418 | inline qint8x16_t vqaddq_qs8(qint8x16_t a, qint8x16_t b) |
| 419 | { |
| 420 | return vqaddq_s8(a, b); |
| 421 | } |
| 422 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 423 | inline qint16x8_t vqaddq_qs16(qint16x8_t a, qint16x8_t b) |
| 424 | { |
| 425 | return vqaddq_s16(a, b); |
| 426 | } |
| 427 | |
Georgios Pinitas | 9247c92 | 2017-06-28 18:29:47 +0100 | [diff] [blame] | 428 | inline qint32x4_t vqaddq_qs32(qint32x4_t a, qint32x4_t b) |
| 429 | { |
| 430 | return vqaddq_s32(a, b); |
| 431 | } |
| 432 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 433 | inline int16x4_t vpaddl_qs8(qint8x8_t a) |
| 434 | { |
| 435 | return vpaddl_s8(a); |
| 436 | } |
| 437 | |
| 438 | inline qint8x8_t vsub_qs8(qint8x8_t a, qint8x8_t b) |
| 439 | { |
| 440 | return vsub_s8(a, b); |
| 441 | } |
| 442 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 443 | inline qint16x4_t vsub_qs16(qint16x4_t a, qint16x4_t b) |
| 444 | { |
| 445 | return vsub_s16(a, b); |
| 446 | } |
| 447 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 448 | inline qint8x16_t vsubq_qs8(qint8x16_t a, qint8x16_t b) |
| 449 | { |
| 450 | return vsubq_s8(a, b); |
| 451 | } |
| 452 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 453 | inline qint16x8_t vsubq_qs16(qint16x8_t a, qint16x8_t b) |
| 454 | { |
| 455 | return vsubq_s16(a, b); |
| 456 | } |
| 457 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 458 | inline qint8x8_t vqsub_qs8(qint8x8_t a, qint8x8_t b) |
| 459 | { |
| 460 | return vqsub_s8(a, b); |
| 461 | } |
| 462 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 463 | inline qint16x4_t vqsub_qs16(qint16x4_t a, qint16x4_t b) |
| 464 | { |
| 465 | return vqsub_s16(a, b); |
| 466 | } |
| 467 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 468 | inline qint8x16_t vqsubq_qs8(qint8x16_t a, qint8x16_t b) |
| 469 | { |
| 470 | return vqsubq_s8(a, b); |
| 471 | } |
| 472 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 473 | inline qint16x8_t vqsubq_qs16(qint16x8_t a, qint16x8_t b) |
| 474 | { |
| 475 | return vqsubq_s16(a, b); |
| 476 | } |
| 477 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 478 | inline qint8x8_t vmul_qs8(qint8x8_t a, qint8x8_t b, int fixed_point_position) |
| 479 | { |
| 480 | const int16x8_t fixed_point_position_s16 = vdupq_n_s16(-fixed_point_position); |
| 481 | |
| 482 | // Initialize the temporary result with a constant used to round up the result |
| 483 | qint16x8_t res = vdupq_n_s16(1 << (fixed_point_position - 1)); |
| 484 | |
| 485 | // Vector multiply-accumulate long |
| 486 | res = vmlal_s8(res, a, b); |
| 487 | |
| 488 | // Shift right by fixed_point_position |
| 489 | res = vshlq_s16(res, fixed_point_position_s16); |
| 490 | |
| 491 | // Convert back to qint8 |
| 492 | return vmovn_s16(res); |
| 493 | } |
| 494 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 495 | inline qint16x4_t vmul_qs16(qint16x4_t a, qint16x4_t b, int fixed_point_position) |
| 496 | { |
| 497 | const int32x4_t fixed_point_position_s32 = vdupq_n_s32(-fixed_point_position); |
| 498 | |
| 499 | // Initialize the temporary result with a constant used to round up the result |
| 500 | qint32x4_t res = vdupq_n_s32(1 << (fixed_point_position - 1)); |
| 501 | |
| 502 | // Vector multiply-accumulate long |
| 503 | res = vmlal_s16(res, a, b); |
| 504 | |
| 505 | // Shift right by fixed_point_position |
| 506 | res = vshlq_s32(res, fixed_point_position_s32); |
| 507 | |
| 508 | // Convert back to qint16 |
| 509 | return vmovn_s32(res); |
| 510 | } |
| 511 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 512 | inline qint8x16_t vmulq_qs8(qint8x16_t a, qint8x16_t b, int fixed_point_position) |
| 513 | { |
| 514 | const int16x8_t fixed_point_position_s16 = vdupq_n_s16(-fixed_point_position); |
| 515 | |
| 516 | // Initialize the temporary results with a constant used to round up the result |
| 517 | qint16x8_t res0 = vdupq_n_s16(1 << (fixed_point_position - 1)); |
| 518 | qint16x8_t res1 = res0; |
| 519 | |
| 520 | // Vector multiply-accumulate long |
| 521 | res0 = vmlal_s8(res0, vget_low_s8(a), vget_low_s8(b)); |
| 522 | res1 = vmlal_s8(res1, vget_high_s8(a), vget_high_s8(b)); |
| 523 | |
| 524 | // Shift right by fixed_point_position |
| 525 | res0 = vshlq_s16(res0, fixed_point_position_s16); |
| 526 | res1 = vshlq_s16(res1, fixed_point_position_s16); |
| 527 | |
| 528 | // Convert back to qint8 |
| 529 | return vcombine_s8(vmovn_s16(res0), vmovn_s16(res1)); |
| 530 | } |
| 531 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 532 | inline qint16x8_t vmulq_qs16(qint16x8_t a, qint16x8_t b, int fixed_point_position) |
| 533 | { |
| 534 | const int32x4_t fixed_point_position_s32 = vdupq_n_s32(-fixed_point_position); |
| 535 | |
| 536 | // Initialize the temporary results with a constant used to round up the result |
| 537 | qint32x4_t res0 = vdupq_n_s32(1 << (fixed_point_position - 1)); |
| 538 | qint32x4_t res1 = res0; |
| 539 | |
| 540 | // Vector multiply-accumulate long |
| 541 | res0 = vmlal_s16(res0, vget_low_qs16(a), vget_low_qs16(b)); |
| 542 | res1 = vmlal_s16(res1, vget_high_qs16(a), vget_high_qs16(b)); |
| 543 | |
| 544 | // Shift right by fixed_point_position |
| 545 | res0 = vshlq_s32(res0, fixed_point_position_s32); |
| 546 | res1 = vshlq_s32(res1, fixed_point_position_s32); |
| 547 | |
| 548 | // Convert back to qint16 |
| 549 | return vcombine_s16(vmovn_s32(res0), vmovn_s32(res1)); |
| 550 | } |
| 551 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 552 | inline qint8x8_t vqmul_qs8(qint8x8_t a, qint8x8_t b, int fixed_point_position) |
| 553 | { |
| 554 | const int16x8_t fixed_point_position_s16 = vdupq_n_s16(-fixed_point_position); |
| 555 | |
| 556 | // Initialize the temporary result with a constant used to round up the result |
| 557 | qint16x8_t res = vdupq_n_s16(1 << (fixed_point_position - 1)); |
| 558 | |
| 559 | // Vector multiply-accumulate long |
| 560 | res = vmlal_s8(res, a, b); |
| 561 | |
| 562 | // Shift right by fixed_point_position |
| 563 | res = vqshlq_s16(res, fixed_point_position_s16); |
| 564 | |
| 565 | // Convert back to qint8 and saturate |
| 566 | return vqmovn_s16(res); |
| 567 | } |
| 568 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 569 | inline qint16x4_t vqmul_qs16(qint16x4_t a, qint16x4_t b, int fixed_point_position) |
| 570 | { |
| 571 | const int32x4_t fixed_point_position_s32 = vdupq_n_s32(-fixed_point_position); |
| 572 | |
| 573 | // Initialize the temporary result with a constant used to round up the result |
| 574 | qint32x4_t res = vdupq_n_s32(1 << (fixed_point_position - 1)); |
| 575 | |
| 576 | // Vector multiply-accumulate long |
| 577 | res = vmlal_s16(res, a, b); |
| 578 | |
| 579 | // Shift right by fixed_point_position |
| 580 | res = vqshlq_s32(res, fixed_point_position_s32); |
| 581 | |
| 582 | // Convert back to qint16 and saturate |
| 583 | return vqmovn_s32(res); |
| 584 | } |
| 585 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 586 | inline qint8x16_t vqmulq_qs8(qint8x16_t a, qint8x16_t b, int fixed_point_position) |
| 587 | { |
| 588 | const int16x8_t fixed_point_position_s16 = vdupq_n_s16(-fixed_point_position); |
| 589 | |
| 590 | // Initialize the temporary results with a constant used to round up the result |
| 591 | qint16x8_t res0 = vdupq_n_s16(1 << (fixed_point_position - 1)); |
| 592 | qint16x8_t res1 = res0; |
| 593 | |
| 594 | // Vector multiply-accumulate long |
| 595 | res0 = vmlal_s8(res0, vget_low_s8(a), vget_low_s8(b)); |
| 596 | res1 = vmlal_s8(res1, vget_high_s8(a), vget_high_s8(b)); |
| 597 | |
| 598 | // Shift right by fixed_point_position |
| 599 | res0 = vqshlq_s16(res0, fixed_point_position_s16); |
| 600 | res1 = vqshlq_s16(res1, fixed_point_position_s16); |
| 601 | |
| 602 | // Convert back to qint8 and saturate |
| 603 | return vcombine_s8(vqmovn_s16(res0), vqmovn_s16(res1)); |
| 604 | } |
| 605 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 606 | inline qint16x8_t vqmulq_qs16(qint16x8_t a, qint16x8_t b, int fixed_point_position) |
| 607 | { |
| 608 | const int32x4_t fixed_point_position_s32 = vdupq_n_s32(-fixed_point_position); |
| 609 | |
| 610 | // Initialize the temporary results with a constant used to round up the result |
| 611 | qint32x4_t res0 = vdupq_n_s32(1 << (fixed_point_position - 1)); |
| 612 | qint32x4_t res1 = res0; |
| 613 | |
| 614 | // Vector multiply-accumulate long |
| 615 | res0 = vmlal_s16(res0, vget_low_qs16(a), vget_low_qs16(b)); |
| 616 | res1 = vmlal_s16(res1, vget_high_qs16(a), vget_high_qs16(b)); |
| 617 | |
| 618 | // Shift right by fixed_point_position |
| 619 | res0 = vqshlq_s32(res0, fixed_point_position_s32); |
| 620 | res1 = vqshlq_s32(res1, fixed_point_position_s32); |
| 621 | |
| 622 | // Convert back to qint16 and saturate |
| 623 | return vcombine_s16(vqmovn_s32(res0), vqmovn_s32(res1)); |
| 624 | } |
| 625 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 626 | inline qint16x8_t vmull_qs8(qint8x8_t a, qint8x8_t b, int fixed_point_position) |
| 627 | { |
| 628 | const int16x8_t fixed_point_position_s16 = vdupq_n_s16(-fixed_point_position); |
| 629 | |
| 630 | qint16x8_t res = vmull_s8(a, b); |
| 631 | |
| 632 | return vqrshlq_s16(res, fixed_point_position_s16); |
| 633 | } |
| 634 | |
Pablo Tello | f87cc7f | 2017-07-26 10:28:40 +0100 | [diff] [blame] | 635 | inline qint32x4_t vmull_qs16(qint16x4_t a, qint16x4_t b, int fixed_point_position) |
| 636 | { |
| 637 | const int32x4_t fixed_point_position_s32 = vdupq_n_s32(-fixed_point_position); |
| 638 | |
| 639 | // Initialize the temporary results with a constant used to round up the result |
| 640 | qint32x4_t tmp = vdupq_n_s32(1 << (fixed_point_position - 1)); |
| 641 | |
| 642 | // Vector multiply-accumulate long |
| 643 | tmp = vmull_s16(a, b); |
| 644 | |
| 645 | // Shift right by fixed_point_position |
| 646 | return vqshlq_s32(tmp, fixed_point_position_s32); |
| 647 | } |
| 648 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 649 | inline qint8x8_t vmla_qs8(qint8x8_t a, qint8x8_t b, qint8x8_t c, int fixed_point_position) |
| 650 | { |
| 651 | const int16x8_t fixed_point_position_s16 = vdupq_n_s16(-fixed_point_position); |
| 652 | |
| 653 | // Initialize the temporary results with a constant used to round up the result |
| 654 | qint16x8_t tmp = vdupq_n_s16(1 << (fixed_point_position - 1)); |
| 655 | |
| 656 | // Vector multiply-accumulate long |
| 657 | tmp = vmlal_s8(tmp, b, c); |
| 658 | |
| 659 | // Shift right by fixed_point_position |
| 660 | tmp = vshlq_s16(tmp, fixed_point_position_s16); |
| 661 | |
| 662 | // Convert back to qint8 and accumulate |
| 663 | return vadd_s8(a, vmovn_s16(tmp)); |
| 664 | } |
| 665 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 666 | inline qint16x4_t vmla_qs16(qint16x4_t a, qint16x4_t b, qint16x4_t c, int fixed_point_position) |
| 667 | { |
| 668 | const int32x4_t fixed_point_position_s32 = vdupq_n_s32(-fixed_point_position); |
| 669 | |
| 670 | // Initialize the temporary results with a constant used to round up the result |
| 671 | qint32x4_t tmp = vdupq_n_s32(1 << (fixed_point_position - 1)); |
| 672 | |
| 673 | // Vector multiply-accumulate long |
| 674 | tmp = vmlal_s16(tmp, b, c); |
| 675 | |
| 676 | // Shift right by fixed_point_position |
| 677 | tmp = vshlq_s32(tmp, fixed_point_position_s32); |
| 678 | |
| 679 | // Convert back to qint16 and accumulate |
| 680 | return vadd_s16(a, vmovn_s32(tmp)); |
| 681 | } |
| 682 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 683 | inline qint8x16_t vmlaq_qs8(qint8x16_t a, qint8x16_t b, qint8x16_t c, int fixed_point_position) |
| 684 | { |
| 685 | const int16x8_t fixed_point_position_s16 = vdupq_n_s16(-fixed_point_position); |
| 686 | |
| 687 | // Initialize the temporary results with a constant used to round up the result |
| 688 | qint16x8_t tmp0 = vdupq_n_s16(1 << (fixed_point_position - 1)); |
| 689 | qint16x8_t tmp1 = tmp0; |
| 690 | |
| 691 | // Vector multiply-accumulate long |
| 692 | tmp0 = vmlal_s8(tmp0, vget_low_s8(b), vget_low_s8(c)); |
| 693 | tmp1 = vmlal_s8(tmp1, vget_high_s8(b), vget_high_s8(c)); |
| 694 | |
| 695 | // Shift right by fixed_point_position |
| 696 | tmp0 = vshlq_s16(tmp0, fixed_point_position_s16); |
| 697 | tmp1 = vshlq_s16(tmp1, fixed_point_position_s16); |
| 698 | |
| 699 | // Convert back to qint8 and accumulate |
| 700 | return vcombine_s8(vadd_s8(vget_low_s8(a), vmovn_s16(tmp0)), vadd_s8(vget_high_s8(a), vmovn_s16(tmp1))); |
| 701 | } |
| 702 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 703 | inline qint16x8_t vmlaq_qs16(qint16x8_t a, qint16x8_t b, qint16x8_t c, int fixed_point_position) |
| 704 | { |
| 705 | const int32x4_t fixed_point_position_s32 = vdupq_n_s32(-fixed_point_position); |
| 706 | |
| 707 | // Initialize the temporary results with a constant used to round up the result |
| 708 | qint32x4_t tmp0 = vdupq_n_s32(1 << (fixed_point_position - 1)); |
| 709 | qint32x4_t tmp1 = tmp0; |
| 710 | |
| 711 | // Vector multiply-accumulate long |
| 712 | tmp0 = vmlal_s16(tmp0, vget_low_qs16(b), vget_low_qs16(c)); |
| 713 | tmp1 = vmlal_s16(tmp1, vget_high_qs16(b), vget_high_qs16(c)); |
| 714 | |
| 715 | // Shift right by fixed_point_position |
| 716 | tmp0 = vshlq_s32(tmp0, fixed_point_position_s32); |
| 717 | tmp1 = vshlq_s32(tmp1, fixed_point_position_s32); |
| 718 | |
| 719 | // Convert back to qint16 and accumulate |
| 720 | return vcombine_s16(vadd_s16(vget_low_qs16(a), vmovn_s32(tmp0)), vadd_s16(vget_high_qs16(a), vmovn_s32(tmp1))); |
| 721 | } |
| 722 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 723 | inline qint8x8_t vqmla_qs8(qint8x8_t a, qint8x8_t b, qint8x8_t c, int fixed_point_position) |
| 724 | { |
| 725 | const int16x8_t fixed_point_position_s16 = vdupq_n_s16(-fixed_point_position); |
| 726 | |
| 727 | // Initialize the temporary results with a constant used to round up the result |
| 728 | qint16x8_t tmp = vdupq_n_s16(1 << (fixed_point_position - 1)); |
| 729 | |
| 730 | // Vector multiply-accumulate long |
| 731 | tmp = vmlal_s8(tmp, b, c); |
| 732 | |
| 733 | // Shift right by fixed_point_position |
| 734 | tmp = vqshlq_s16(tmp, fixed_point_position_s16); |
| 735 | |
| 736 | // Convert back to qint8 and accumulate |
| 737 | return vqadd_s8(a, vqmovn_s16(tmp)); |
| 738 | } |
| 739 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 740 | inline qint16x4_t vqmla_qs16(qint16x4_t a, qint16x4_t b, qint16x4_t c, int fixed_point_position) |
| 741 | { |
| 742 | const int32x4_t fixed_point_position_s32 = vdupq_n_s32(-fixed_point_position); |
| 743 | |
| 744 | // Initialize the temporary results with a constant used to round up the result |
| 745 | qint32x4_t tmp = vdupq_n_s32(1 << (fixed_point_position - 1)); |
| 746 | |
| 747 | // Vector multiply-accumulate long |
| 748 | tmp = vmlal_s16(tmp, b, c); |
| 749 | |
| 750 | // Shift right by fixed_point_position |
| 751 | tmp = vqshlq_s32(tmp, fixed_point_position_s32); |
| 752 | |
| 753 | // Convert back to qint8 and accumulate |
| 754 | return vqadd_s16(a, vqmovn_s32(tmp)); |
| 755 | } |
| 756 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 757 | inline qint8x16_t vqmlaq_qs8(qint8x16_t a, qint8x16_t b, qint8x16_t c, int fixed_point_position) |
| 758 | { |
| 759 | const int16x8_t fixed_point_position_s16 = vdupq_n_s16(-fixed_point_position); |
| 760 | |
| 761 | // Initialize the temporary results with a constant used to round up the result |
| 762 | qint16x8_t tmp0 = vdupq_n_s16(1 << (fixed_point_position - 1)); |
| 763 | qint16x8_t tmp1 = tmp0; |
| 764 | |
| 765 | // Vector multiply-accumulate long |
| 766 | tmp0 = vmlal_s8(tmp0, vget_low_s8(b), vget_low_s8(c)); |
| 767 | tmp1 = vmlal_s8(tmp1, vget_high_s8(b), vget_high_s8(c)); |
| 768 | |
| 769 | // Shift right by fixed_point_position |
| 770 | tmp0 = vqshlq_s16(tmp0, fixed_point_position_s16); |
| 771 | tmp1 = vqshlq_s16(tmp1, fixed_point_position_s16); |
| 772 | |
| 773 | // Convert back to qint8 and accumulate |
| 774 | qint8x16_t res = vcombine_s8(vqmovn_s16(tmp0), vqmovn_s16(tmp1)); |
| 775 | return vqaddq_s8(a, res); |
| 776 | } |
| 777 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 778 | inline qint16x8_t vqmlaq_qs16(qint16x8_t a, qint16x8_t b, qint16x8_t c, int fixed_point_position) |
| 779 | { |
| 780 | const int32x4_t fixed_point_position_s32 = vdupq_n_s32(-fixed_point_position); |
| 781 | |
| 782 | // Initialize the temporary results with a constant used to round up the result |
| 783 | qint32x4_t tmp0 = vdupq_n_s32(1 << (fixed_point_position - 1)); |
| 784 | qint32x4_t tmp1 = tmp0; |
| 785 | |
| 786 | // Vector multiply-accumulate long |
| 787 | tmp0 = vmlal_s16(tmp0, vget_low_qs16(b), vget_low_qs16(c)); |
| 788 | tmp1 = vmlal_s16(tmp1, vget_high_qs16(b), vget_high_qs16(c)); |
| 789 | |
| 790 | // Shift right by fixed_point_position |
| 791 | tmp0 = vqshlq_s32(tmp0, fixed_point_position_s32); |
| 792 | tmp1 = vqshlq_s32(tmp1, fixed_point_position_s32); |
| 793 | |
| 794 | // Convert back to qint16 and accumulate |
| 795 | qint16x8_t res = vcombine_s16(vqmovn_s32(tmp0), vqmovn_s32(tmp1)); |
| 796 | return vqaddq_s16(a, res); |
| 797 | } |
| 798 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 799 | inline qint16x8_t vmlal_qs8(qint16x8_t a, qint8x8_t b, qint8x8_t c, int fixed_point_position) |
| 800 | { |
| 801 | const int16x8_t fixed_point_position_s16 = vdupq_n_s16(-fixed_point_position); |
| 802 | |
| 803 | // Initialize the temporary results with a constant used to round up the result |
| 804 | qint16x8_t tmp = vdupq_n_s16(1 << (fixed_point_position - 1)); |
| 805 | |
| 806 | // Vector multiply-accumulate long |
| 807 | tmp = vmlal_s8(tmp, b, c); |
| 808 | |
| 809 | // Shift right by fixed_point_position |
| 810 | tmp = vshlq_s16(tmp, fixed_point_position_s16); |
| 811 | |
| 812 | // Accumulate |
| 813 | return vaddq_s16(a, tmp); |
| 814 | } |
| 815 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 816 | inline qint32x4_t vmlal_qs16(qint32x4_t a, qint16x4_t b, qint16x4_t c, int fixed_point_position) |
| 817 | { |
| 818 | const int32x4_t fixed_point_position_s32 = vdupq_n_s32(-fixed_point_position); |
| 819 | |
| 820 | // Initialize the temporary results with a constant used to round up the result |
| 821 | qint32x4_t tmp = vdupq_n_s32(1 << (fixed_point_position - 1)); |
| 822 | |
| 823 | // Vector multiply-accumulate long |
| 824 | tmp = vmlal_s16(tmp, b, c); |
| 825 | |
| 826 | // Shift right by fixed_point_position |
| 827 | tmp = vshlq_s32(tmp, fixed_point_position_s32); |
| 828 | |
| 829 | // Accumulate |
| 830 | return vaddq_s32(a, tmp); |
| 831 | } |
| 832 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 833 | inline qint16x8_t vqmlal_qs8(qint16x8_t a, qint8x8_t b, qint8x8_t c, int fixed_point_position) |
| 834 | { |
| 835 | const int16x8_t fixed_point_position_s16 = vdupq_n_s16(-fixed_point_position); |
| 836 | |
| 837 | // Initialize the temporary results with a constant used to round up the result |
| 838 | qint16x8_t tmp = vdupq_n_s16(1 << (fixed_point_position - 1)); |
| 839 | |
| 840 | // Vector multiply-accumulate long |
| 841 | tmp = vmlal_s8(tmp, b, c); |
| 842 | |
| 843 | // Shift right by fixed_point_position |
| 844 | tmp = vqshlq_s16(tmp, fixed_point_position_s16); |
| 845 | |
| 846 | // Accumulate |
| 847 | return vqaddq_s16(a, tmp); |
| 848 | } |
| 849 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 850 | inline qint32x4_t vqmlal_qs16(qint32x4_t a, qint16x4_t b, qint16x4_t c, int fixed_point_position) |
| 851 | { |
| 852 | const int32x4_t fixed_point_position_s32 = vdupq_n_s32(-fixed_point_position); |
| 853 | |
| 854 | // Initialize the temporary results with a constant used to round up the result |
| 855 | qint32x4_t tmp = vdupq_n_s32(1 << (fixed_point_position - 1)); |
| 856 | |
| 857 | // Vector multiply-accumulate long |
| 858 | tmp = vmlal_s16(tmp, b, c); |
| 859 | |
| 860 | // Shift right by fixed_point_position |
| 861 | tmp = vqshlq_s32(tmp, fixed_point_position_s32); |
| 862 | |
| 863 | // Accumulate |
| 864 | return vqaddq_s32(a, tmp); |
| 865 | } |
| 866 | |
Georgios Pinitas | 21efeb4 | 2017-07-04 12:47:17 +0100 | [diff] [blame] | 867 | inline qint8x8_t vqcvt_qs8_f32(const float32x4x2_t &a, int fixed_point_position) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 868 | { |
| 869 | const float32x4_t pow2 = vdupq_n_f32(static_cast<float>(1 << fixed_point_position)); |
| 870 | |
| 871 | float32x4x2_t res_f32 = |
| 872 | { |
| 873 | { |
Georgios Pinitas | 21efeb4 | 2017-07-04 12:47:17 +0100 | [diff] [blame] | 874 | vbslq_f32(vcgeq_f32(a.val[0], vdupq_n_f32(0)), vdupq_n_f32(0.5f), vdupq_n_f32(-0.5f)), |
| 875 | vbslq_f32(vcgeq_f32(a.val[1], vdupq_n_f32(0)), vdupq_n_f32(0.5f), vdupq_n_f32(-0.5f)) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 876 | } |
| 877 | }; |
| 878 | |
| 879 | res_f32.val[0] = vmlaq_f32(res_f32.val[0], a.val[0], pow2); |
| 880 | res_f32.val[1] = vmlaq_f32(res_f32.val[1], a.val[1], pow2); |
| 881 | |
| 882 | const int32x4x2_t res_s32 = |
| 883 | { |
| 884 | { |
| 885 | vcvtq_s32_f32(res_f32.val[0]), |
| 886 | vcvtq_s32_f32(res_f32.val[1]), |
| 887 | } |
| 888 | }; |
| 889 | |
| 890 | const int16x8_t res_s16 = vcombine_s16(vqmovn_s32(res_s32.val[0]), vqmovn_s32(res_s32.val[1])); |
| 891 | |
| 892 | return vqmovn_s16(res_s16); |
| 893 | } |
| 894 | |
Georgios Pinitas | 21efeb4 | 2017-07-04 12:47:17 +0100 | [diff] [blame] | 895 | inline qint16x4_t vqcvt_qs16_f32(const float32x4_t a, int fixed_point_position) |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 896 | { |
| 897 | const float32x4_t pow2 = vdupq_n_f32(static_cast<float>(1 << fixed_point_position)); |
| 898 | |
Georgios Pinitas | 21efeb4 | 2017-07-04 12:47:17 +0100 | [diff] [blame] | 899 | float32x4_t res_f32 = vbslq_f32(vcgeq_f32(a, vdupq_n_f32(0)), vdupq_n_f32(0.5f), vdupq_n_f32(-0.5f)); |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 900 | |
| 901 | res_f32 = vmlaq_f32(res_f32, a, pow2); |
| 902 | |
| 903 | const int32x4_t res_s32 = vcvtq_s32_f32(res_f32); |
| 904 | |
| 905 | return vqmovn_s32(res_s32); |
| 906 | } |
| 907 | |
Georgios Pinitas | 21efeb4 | 2017-07-04 12:47:17 +0100 | [diff] [blame] | 908 | inline qint8x16_t vqcvtq_qs8_f32(const float32x4x4_t &a, int fixed_point_position) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 909 | { |
| 910 | const float32x4_t pow2 = vdupq_n_f32(static_cast<float>(1 << fixed_point_position)); |
| 911 | |
| 912 | float32x4x4_t res_f32 = |
| 913 | { |
| 914 | { |
Georgios Pinitas | 21efeb4 | 2017-07-04 12:47:17 +0100 | [diff] [blame] | 915 | vbslq_f32(vcgeq_f32(a.val[0], vdupq_n_f32(0)), vdupq_n_f32(0.5f), vdupq_n_f32(-0.5f)), |
| 916 | vbslq_f32(vcgeq_f32(a.val[1], vdupq_n_f32(0)), vdupq_n_f32(0.5f), vdupq_n_f32(-0.5f)), |
| 917 | vbslq_f32(vcgeq_f32(a.val[2], vdupq_n_f32(0)), vdupq_n_f32(0.5f), vdupq_n_f32(-0.5f)), |
| 918 | vbslq_f32(vcgeq_f32(a.val[3], vdupq_n_f32(0)), vdupq_n_f32(0.5f), vdupq_n_f32(-0.5f)) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 919 | } |
| 920 | }; |
| 921 | |
| 922 | res_f32.val[0] = vmlaq_f32(res_f32.val[0], a.val[0], pow2); |
| 923 | res_f32.val[1] = vmlaq_f32(res_f32.val[1], a.val[1], pow2); |
| 924 | res_f32.val[2] = vmlaq_f32(res_f32.val[2], a.val[2], pow2); |
| 925 | res_f32.val[3] = vmlaq_f32(res_f32.val[3], a.val[3], pow2); |
| 926 | |
| 927 | const int32x4x4_t res_s32 = |
| 928 | { |
| 929 | { |
| 930 | vcvtq_s32_f32(res_f32.val[0]), |
| 931 | vcvtq_s32_f32(res_f32.val[1]), |
| 932 | vcvtq_s32_f32(res_f32.val[2]), |
| 933 | vcvtq_s32_f32(res_f32.val[3]), |
| 934 | } |
| 935 | }; |
| 936 | |
| 937 | const int16x8x2_t res_s16 = |
| 938 | { |
| 939 | { |
| 940 | vcombine_s16(vqmovn_s32(res_s32.val[0]), vqmovn_s32(res_s32.val[1])), |
| 941 | vcombine_s16(vqmovn_s32(res_s32.val[2]), vqmovn_s32(res_s32.val[3])), |
| 942 | } |
| 943 | }; |
| 944 | |
| 945 | return vcombine_s8(vqmovn_s16(res_s16.val[0]), vqmovn_s16(res_s16.val[1])); |
| 946 | } |
| 947 | |
Georgios Pinitas | 21efeb4 | 2017-07-04 12:47:17 +0100 | [diff] [blame] | 948 | inline qint16x8_t vqcvtq_qs16_f32(const float32x4x2_t &a, int fixed_point_position) |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 949 | { |
| 950 | const float32x4_t pow2 = vdupq_n_f32(static_cast<float>(1 << fixed_point_position)); |
| 951 | |
| 952 | float32x4x2_t res_f32 = |
| 953 | { |
| 954 | { |
Georgios Pinitas | 21efeb4 | 2017-07-04 12:47:17 +0100 | [diff] [blame] | 955 | vbslq_f32(vcgeq_f32(a.val[0], vdupq_n_f32(0)), vdupq_n_f32(0.5f), vdupq_n_f32(-0.5f)), |
| 956 | vbslq_f32(vcgeq_f32(a.val[1], vdupq_n_f32(0)), vdupq_n_f32(0.5f), vdupq_n_f32(-0.5f)) |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 957 | } |
| 958 | }; |
| 959 | |
| 960 | res_f32.val[0] = vmlaq_f32(res_f32.val[0], a.val[0], pow2); |
| 961 | res_f32.val[1] = vmlaq_f32(res_f32.val[1], a.val[1], pow2); |
| 962 | |
| 963 | const int32x4x2_t res_s32 = |
| 964 | { |
| 965 | { |
| 966 | vcvtq_s32_f32(res_f32.val[0]), |
| 967 | vcvtq_s32_f32(res_f32.val[1]) |
| 968 | } |
| 969 | }; |
| 970 | |
| 971 | return vcombine_s16(vqmovn_s32(res_s32.val[0]), vqmovn_s32(res_s32.val[1])); |
| 972 | } |
| 973 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 974 | inline float32x4x2_t vcvt_f32_qs8(qint8x8_t a, int fixed_point_position) |
| 975 | { |
| 976 | const float32x4_t pow2 = vdupq_n_f32(1.0f / (1 << fixed_point_position)); |
| 977 | |
| 978 | const int16x8_t res_s16 = vmovl_s8(a); |
| 979 | |
| 980 | const int32x4x2_t res_s32 = |
| 981 | { |
| 982 | { |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 983 | vmovl_s16(vget_low_qs16(res_s16)), |
| 984 | vmovl_s16(vget_high_qs16(res_s16)) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 985 | } |
| 986 | }; |
| 987 | |
| 988 | float32x4x2_t res_f32 = |
| 989 | { |
| 990 | { |
| 991 | vcvtq_f32_s32(res_s32.val[0]), |
| 992 | vcvtq_f32_s32(res_s32.val[1]) |
| 993 | } |
| 994 | }; |
| 995 | |
| 996 | res_f32.val[0] = vmulq_f32(res_f32.val[0], pow2); |
| 997 | res_f32.val[1] = vmulq_f32(res_f32.val[1], pow2); |
| 998 | |
| 999 | return res_f32; |
| 1000 | } |
| 1001 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1002 | inline float32x4_t vcvt_f32_qs16(qint16x4_t a, int fixed_point_position) |
| 1003 | { |
| 1004 | const float32x4_t pow2 = vdupq_n_f32(1.0f / (1 << fixed_point_position)); |
| 1005 | const float32x4_t res_f32 = vcvtq_f32_s32(vmovl_s16(a)); |
| 1006 | |
| 1007 | return vmulq_f32(res_f32, pow2); |
| 1008 | } |
| 1009 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1010 | inline float32x4x4_t vcvtq_f32_qs8(qint8x16_t a, int fixed_point_position) |
| 1011 | { |
| 1012 | const float32x4_t pow2 = vdupq_n_f32(1.0f / (1 << fixed_point_position)); |
| 1013 | |
| 1014 | const int16x8x2_t res_s16 = |
| 1015 | { |
| 1016 | { |
| 1017 | vmovl_s8(vget_low_s8(a)), |
| 1018 | vmovl_s8(vget_high_s8(a)), |
| 1019 | } |
| 1020 | }; |
| 1021 | |
| 1022 | const int32x4x4_t res_s32 = |
| 1023 | { |
| 1024 | { |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1025 | vmovl_s16(vget_low_qs16(res_s16.val[0])), |
| 1026 | vmovl_s16(vget_high_qs16(res_s16.val[0])), |
| 1027 | vmovl_s16(vget_low_qs16(res_s16.val[1])), |
| 1028 | vmovl_s16(vget_high_qs16(res_s16.val[1])), |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1029 | } |
| 1030 | }; |
| 1031 | |
| 1032 | float32x4x4_t res_f32 = |
| 1033 | { |
| 1034 | { |
| 1035 | vcvtq_f32_s32(res_s32.val[0]), |
| 1036 | vcvtq_f32_s32(res_s32.val[1]), |
| 1037 | vcvtq_f32_s32(res_s32.val[2]), |
| 1038 | vcvtq_f32_s32(res_s32.val[3]) |
| 1039 | } |
| 1040 | }; |
| 1041 | |
| 1042 | res_f32.val[0] = vmulq_f32(res_f32.val[0], pow2); |
| 1043 | res_f32.val[1] = vmulq_f32(res_f32.val[1], pow2); |
| 1044 | res_f32.val[2] = vmulq_f32(res_f32.val[2], pow2); |
| 1045 | res_f32.val[3] = vmulq_f32(res_f32.val[3], pow2); |
| 1046 | |
| 1047 | return res_f32; |
| 1048 | } |
| 1049 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1050 | inline float32x4x2_t vcvtq_f32_qs16(qint16x8_t a, int fixed_point_position) |
| 1051 | { |
| 1052 | const float32x4_t pow2 = vdupq_n_f32(1.0f / (1 << fixed_point_position)); |
| 1053 | |
| 1054 | const int32x4x2_t res_s32 = |
| 1055 | { |
| 1056 | { |
| 1057 | vmovl_s16(vget_low_qs16(a)), |
| 1058 | vmovl_s16(vget_high_qs16(a)) |
| 1059 | } |
| 1060 | }; |
| 1061 | |
| 1062 | float32x4x2_t res_f32 = |
| 1063 | { |
| 1064 | { |
| 1065 | vcvtq_f32_s32(res_s32.val[0]), |
| 1066 | vcvtq_f32_s32(res_s32.val[1]) |
| 1067 | } |
| 1068 | }; |
| 1069 | |
| 1070 | res_f32.val[0] = vmulq_f32(res_f32.val[0], pow2); |
| 1071 | res_f32.val[1] = vmulq_f32(res_f32.val[1], pow2); |
| 1072 | |
| 1073 | return res_f32; |
| 1074 | } |
| 1075 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1076 | inline qint8x8_t vrecip_qs8(qint8x8_t a, int fixed_point_position) |
| 1077 | { |
| 1078 | // We need two bits to store 2, thus we can only support formats from Q2.5 to Q7.0 |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1079 | const qint8x8_t const_48_over_17 = vdup_n_s8(0x5A >> (5 - fixed_point_position)); // 2.823 |
| 1080 | const qint8x8_t const_32_over_17 = vdup_n_s8((0x3C >> (5 - fixed_point_position))); // 1.8823 |
| 1081 | const qint8x8_t const_one = vdup_n_s8(1 << fixed_point_position); |
Michalis Spyrou | 25466a9 | 2017-08-17 12:56:46 +0100 | [diff] [blame] | 1082 | const qint8x8_t const_two = vdup_n_s8(2 << fixed_point_position); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1083 | |
| 1084 | // Find shift value |
| 1085 | const qint8x8_t shift_value = vneg_s8(vsub_s8(vdup_n_s8(8), vadd_s8(vclz_s8(a), vdup_n_s8(fixed_point_position)))); |
| 1086 | const qint8x8_t temp = vshl_s8(a, shift_value); |
| 1087 | |
Michalis Spyrou | bbd3d60 | 2017-06-21 17:29:40 +0100 | [diff] [blame] | 1088 | // Newton-Raphson division initial estimate X0 calculation |
| 1089 | qint8x8_t x = vsub_s8(const_48_over_17, vmul_qs8(temp, const_32_over_17, fixed_point_position)); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1090 | |
| 1091 | uint8x8_t set_one = vcgt_s8(x, const_one); |
| 1092 | x = vbsl_s8(set_one, const_one, x); |
| 1093 | |
| 1094 | // Use three iterations of Newton-Raphson method to get the result |
Michalis Spyrou | 25466a9 | 2017-08-17 12:56:46 +0100 | [diff] [blame] | 1095 | x = vmul_qs8(x, vsub_s8(const_two, vmul_qs8(temp, x, fixed_point_position)), fixed_point_position); |
| 1096 | x = vmul_qs8(x, vsub_s8(const_two, vmul_qs8(temp, x, fixed_point_position)), fixed_point_position); |
| 1097 | x = vmul_qs8(x, vsub_s8(const_two, vmul_qs8(temp, x, fixed_point_position)), fixed_point_position); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1098 | |
| 1099 | return vshl_s8(x, shift_value); |
| 1100 | } |
| 1101 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1102 | inline qint16x4_t vrecip_qs16(qint16x4_t a, int fixed_point_position) |
| 1103 | { |
| 1104 | // We need two bits to store 2, thus we can only support formats from Q2.13 to Q15.0 |
| 1105 | const qint16x4_t const_48_over_17 = vdup_n_s16(0x5A5A >> (13 - fixed_point_position)); // 2.823 |
| 1106 | const qint16x4_t const_32_over_17 = vdup_n_s16(0x3C3C >> (13 - fixed_point_position)); // 1.8823 |
| 1107 | const qint16x4_t const_one = vdup_n_s16(1 << fixed_point_position); |
Michalis Spyrou | 25466a9 | 2017-08-17 12:56:46 +0100 | [diff] [blame] | 1108 | const qint16x4_t const_two = vdup_n_s16(2 << fixed_point_position); |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1109 | |
| 1110 | // Find shift value |
| 1111 | const qint16x4_t shift_value = vneg_s16(vsub_s16(vdup_n_s16(8), vadd_s16(vclz_s16(a), vdup_n_s16(fixed_point_position)))); |
| 1112 | const qint16x4_t temp = vshl_s16(a, shift_value); |
| 1113 | |
Michalis Spyrou | bbd3d60 | 2017-06-21 17:29:40 +0100 | [diff] [blame] | 1114 | // Newton-Raphson division initial estimate X0 calculation |
| 1115 | qint16x4_t x = vsub_s16(const_48_over_17, vmul_qs16(temp, const_32_over_17, fixed_point_position)); |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1116 | |
| 1117 | uint16x4_t set_one = vcgt_s16(x, const_one); |
| 1118 | x = vbsl_s16(set_one, const_one, x); |
| 1119 | |
Michalis Spyrou | 25466a9 | 2017-08-17 12:56:46 +0100 | [diff] [blame] | 1120 | // Use four iterations of Newton-Raphson method to get the result |
| 1121 | x = vmul_qs16(x, vsub_s16(const_two, vmul_qs16(temp, x, fixed_point_position)), fixed_point_position); |
| 1122 | x = vmul_qs16(x, vsub_s16(const_two, vmul_qs16(temp, x, fixed_point_position)), fixed_point_position); |
| 1123 | x = vmul_qs16(x, vsub_s16(const_two, vmul_qs16(temp, x, fixed_point_position)), fixed_point_position); |
| 1124 | x = vmul_qs16(x, vsub_s16(const_two, vmul_qs16(temp, x, fixed_point_position)), fixed_point_position); |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1125 | |
| 1126 | return vshl_s16(x, shift_value); |
| 1127 | } |
| 1128 | |
Georgios Pinitas | 9247c92 | 2017-06-28 18:29:47 +0100 | [diff] [blame] | 1129 | inline qint8x8_t vqrecip_qs8(qint8x8_t a, int fixed_point_position) |
| 1130 | { |
| 1131 | // We need two bits to store 2, thus we can only support formats from Q2.5 to Q7.0 |
| 1132 | const qint8x8_t const_48_over_17 = vdup_n_s8(0x5A >> (5 - fixed_point_position)); // 2.823 |
| 1133 | const qint8x8_t const_32_over_17 = vdup_n_s8((0x3C >> (5 - fixed_point_position))); // 1.8823 |
| 1134 | const qint8x8_t const_one = vdup_n_s8(1 << fixed_point_position); |
Michalis Spyrou | 25466a9 | 2017-08-17 12:56:46 +0100 | [diff] [blame] | 1135 | const qint8x8_t const_two = vdup_n_s8(2 << fixed_point_position); |
Georgios Pinitas | 9247c92 | 2017-06-28 18:29:47 +0100 | [diff] [blame] | 1136 | |
| 1137 | // Find shift value |
Michalis Spyrou | bbd3d60 | 2017-06-21 17:29:40 +0100 | [diff] [blame] | 1138 | const qint8x8_t shift_value = vqneg_s8(vqsub_s8(vdup_n_s8(8), vqadd_s8(vclz_s8(a), vdup_n_s8(fixed_point_position)))); |
Georgios Pinitas | 9247c92 | 2017-06-28 18:29:47 +0100 | [diff] [blame] | 1139 | const qint8x8_t temp = vqshl_s8(a, shift_value); |
| 1140 | |
Michalis Spyrou | bbd3d60 | 2017-06-21 17:29:40 +0100 | [diff] [blame] | 1141 | // Newton-Raphson division initial estimate X0 calculation |
| 1142 | qint8x8_t x = vqsub_s8(const_48_over_17, vqmul_qs8(temp, const_32_over_17, fixed_point_position)); |
Georgios Pinitas | 9247c92 | 2017-06-28 18:29:47 +0100 | [diff] [blame] | 1143 | |
| 1144 | uint8x8_t set_one = vcgt_s8(x, const_one); |
| 1145 | x = vbsl_s8(set_one, const_one, x); |
| 1146 | |
| 1147 | // Use three iterations of Newton-Raphson method to get the result |
Michalis Spyrou | 25466a9 | 2017-08-17 12:56:46 +0100 | [diff] [blame] | 1148 | x = vqmul_qs8(x, vqsub_s8(const_two, vqmul_qs8(temp, x, fixed_point_position)), fixed_point_position); |
| 1149 | x = vqmul_qs8(x, vqsub_s8(const_two, vqmul_qs8(temp, x, fixed_point_position)), fixed_point_position); |
| 1150 | x = vqmul_qs8(x, vqsub_s8(const_two, vqmul_qs8(temp, x, fixed_point_position)), fixed_point_position); |
Georgios Pinitas | 9247c92 | 2017-06-28 18:29:47 +0100 | [diff] [blame] | 1151 | |
| 1152 | return vqshl_s8(x, shift_value); |
| 1153 | } |
| 1154 | |
| 1155 | inline qint16x4_t vqrecip_qs16(qint16x4_t a, int fixed_point_position) |
| 1156 | { |
| 1157 | // We need two bits to store 2, thus we can only support formats from Q2.13 to Q15.0 |
| 1158 | const qint16x4_t const_48_over_17 = vdup_n_s16(0x5A5A >> (13 - fixed_point_position)); // 2.823 |
| 1159 | const qint16x4_t const_32_over_17 = vdup_n_s16(0x3C3C >> (13 - fixed_point_position)); // 1.8823 |
| 1160 | const qint16x4_t const_one = vdup_n_s16(1 << fixed_point_position); |
Michalis Spyrou | 25466a9 | 2017-08-17 12:56:46 +0100 | [diff] [blame] | 1161 | const qint16x4_t const_two = vdup_n_s16(2 << fixed_point_position); |
Georgios Pinitas | 9247c92 | 2017-06-28 18:29:47 +0100 | [diff] [blame] | 1162 | |
| 1163 | // Find shift value |
| 1164 | const qint16x4_t shift_value = vqneg_s16(vqsub_s16(vdup_n_s16(8), vqadd_s16(vclz_s16(a), vdup_n_s16(fixed_point_position)))); |
| 1165 | const qint16x4_t temp = vqshl_s16(a, shift_value); |
| 1166 | |
Michalis Spyrou | bbd3d60 | 2017-06-21 17:29:40 +0100 | [diff] [blame] | 1167 | // Newton-Raphson division initial estimate X0 calculation |
| 1168 | qint16x4_t x = vqsub_s16(const_48_over_17, vqmul_qs16(temp, const_32_over_17, fixed_point_position)); |
Georgios Pinitas | 9247c92 | 2017-06-28 18:29:47 +0100 | [diff] [blame] | 1169 | |
| 1170 | uint16x4_t set_one = vcgt_s16(x, const_one); |
| 1171 | x = vbsl_s16(set_one, const_one, x); |
| 1172 | |
Michalis Spyrou | 25466a9 | 2017-08-17 12:56:46 +0100 | [diff] [blame] | 1173 | // Use four iterations of Newton-Raphson method to get the result |
| 1174 | x = vqmul_qs16(x, vqsub_s16(const_two, vqmul_qs16(temp, x, fixed_point_position)), fixed_point_position); |
| 1175 | x = vqmul_qs16(x, vqsub_s16(const_two, vqmul_qs16(temp, x, fixed_point_position)), fixed_point_position); |
| 1176 | x = vqmul_qs16(x, vqsub_s16(const_two, vqmul_qs16(temp, x, fixed_point_position)), fixed_point_position); |
| 1177 | x = vqmul_qs16(x, vqsub_s16(const_two, vqmul_qs16(temp, x, fixed_point_position)), fixed_point_position); |
Georgios Pinitas | 9247c92 | 2017-06-28 18:29:47 +0100 | [diff] [blame] | 1178 | |
| 1179 | return vqshl_s16(x, shift_value); |
| 1180 | } |
| 1181 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1182 | inline qint8x16_t vrecipq_qs8(qint8x16_t a, int fixed_point_position) |
| 1183 | { |
| 1184 | // We need two bits to store 2, thus we can only support formats from Q2.5 to Q7.0 |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1185 | const qint8x16_t const_48_over_17 = vdupq_n_s8(0x5A >> (5 - fixed_point_position)); // 2.823 |
| 1186 | const qint8x16_t const_32_over_17 = vdupq_n_s8((0x3C >> (5 - fixed_point_position))); // -1.8823 |
| 1187 | const qint8x16_t const_one = vdupq_n_s8(1 << fixed_point_position); |
Michalis Spyrou | 25466a9 | 2017-08-17 12:56:46 +0100 | [diff] [blame] | 1188 | const qint8x16_t const_two = vdupq_n_s8(2 << fixed_point_position); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1189 | |
| 1190 | // Find shift value |
| 1191 | const qint8x16_t shift_value = vnegq_s8(vsubq_s8(vdupq_n_s8(8), vaddq_s8(vclzq_s8(a), vdupq_n_s8(fixed_point_position)))); |
| 1192 | const qint8x16_t temp = vshlq_s8(a, shift_value); |
| 1193 | |
Michalis Spyrou | bbd3d60 | 2017-06-21 17:29:40 +0100 | [diff] [blame] | 1194 | // Newton-Raphson division initial estimate X0 calculation |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1195 | qint8x16_t x = vsubq_qs8(const_48_over_17, vmulq_qs8(temp, const_32_over_17, fixed_point_position)); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1196 | |
| 1197 | // Set initial guess to one if x > 1 |
| 1198 | uint8x16_t set_one = vcgtq_s8(x, const_one); |
| 1199 | x = vbslq_s8(set_one, const_one, x); |
| 1200 | |
| 1201 | // Use three iterations of Newton-Raphson method to get the result |
Michalis Spyrou | 25466a9 | 2017-08-17 12:56:46 +0100 | [diff] [blame] | 1202 | x = vmulq_qs8(x, vsubq_s8(const_two, vmulq_qs8(temp, x, fixed_point_position)), fixed_point_position); |
| 1203 | x = vmulq_qs8(x, vsubq_s8(const_two, vmulq_qs8(temp, x, fixed_point_position)), fixed_point_position); |
| 1204 | x = vmulq_qs8(x, vsubq_s8(const_two, vmulq_qs8(temp, x, fixed_point_position)), fixed_point_position); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1205 | |
| 1206 | return vshlq_s8(x, shift_value); |
| 1207 | } |
| 1208 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1209 | inline qint16x8_t vrecipq_qs16(qint16x8_t a, int fixed_point_position) |
| 1210 | { |
| 1211 | // We need two bits to store 2, thus we can only support formats from Q2.13 to Q15.0 |
| 1212 | const qint16x8_t const_48_over_17 = vdupq_n_s16(0x5A56 >> (13 - fixed_point_position)); // 2.823 |
| 1213 | const qint16x8_t const_32_over_17 = vdupq_n_s16(0x3C3C >> (13 - fixed_point_position)); // 1.8823 |
| 1214 | const qint16x8_t const_one = vdupq_n_s16(1 << fixed_point_position); |
Michalis Spyrou | 25466a9 | 2017-08-17 12:56:46 +0100 | [diff] [blame] | 1215 | const qint16x8_t const_two = vdupq_n_s16(2 << fixed_point_position); |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1216 | |
| 1217 | // Find shift value |
| 1218 | const qint16x8_t shift_value = vnegq_s16(vsubq_s16(vdupq_n_s16(16), vaddq_s16(vclzq_s16(a), vdupq_n_s16(fixed_point_position)))); |
| 1219 | const qint16x8_t temp = vshlq_s16(a, shift_value); |
| 1220 | |
Michalis Spyrou | bbd3d60 | 2017-06-21 17:29:40 +0100 | [diff] [blame] | 1221 | // Newton-Raphson division initial estimate X0 calculation |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1222 | qint16x8_t x = vsubq_qs16(const_48_over_17, vmulq_qs16(temp, const_32_over_17, fixed_point_position)); |
| 1223 | |
| 1224 | // Set initial guess to one if x > 1 |
| 1225 | uint16x8_t set_one = vcgtq_s16(x, const_one); |
| 1226 | x = vbslq_s16(set_one, const_one, x); |
| 1227 | |
Michalis Spyrou | 25466a9 | 2017-08-17 12:56:46 +0100 | [diff] [blame] | 1228 | // Use four iterations of Newton-Raphson method to get the result |
| 1229 | x = vmulq_qs16(x, vsubq_s16(const_two, vmulq_qs16(temp, x, fixed_point_position)), fixed_point_position); |
| 1230 | x = vmulq_qs16(x, vsubq_s16(const_two, vmulq_qs16(temp, x, fixed_point_position)), fixed_point_position); |
| 1231 | x = vmulq_qs16(x, vsubq_s16(const_two, vmulq_qs16(temp, x, fixed_point_position)), fixed_point_position); |
| 1232 | x = vmulq_qs16(x, vsubq_s16(const_two, vmulq_qs16(temp, x, fixed_point_position)), fixed_point_position); |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1233 | |
| 1234 | return vshlq_s16(x, shift_value); |
| 1235 | } |
| 1236 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1237 | inline qint8x16_t vqrecipq_qs8(qint8x16_t a, int fixed_point_position) |
| 1238 | { |
| 1239 | // We need two bits to store 2, thus we can only support formats from Q2.5 to Q7.0 |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1240 | const qint8x16_t const_48_over_17 = vdupq_n_s8(0x5A >> (5 - fixed_point_position)); // 2.823 |
| 1241 | const qint8x16_t const_32_over_17 = vdupq_n_s8((0x3C >> (5 - fixed_point_position))); // -1.8823 |
| 1242 | const qint8x16_t const_one = vdupq_n_s8(1 << fixed_point_position); |
Michalis Spyrou | 25466a9 | 2017-08-17 12:56:46 +0100 | [diff] [blame] | 1243 | const qint8x16_t const_two = vdupq_n_s8(2 << fixed_point_position); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1244 | |
| 1245 | // Find shift value |
| 1246 | const qint8x16_t shift_value = vqnegq_s8(vqsubq_s8(vdupq_n_s8(8), vqaddq_s8(vclzq_s8(a), vdupq_n_s8(fixed_point_position)))); |
| 1247 | const qint8x16_t temp = vqshlq_s8(a, shift_value); |
| 1248 | |
Michalis Spyrou | bbd3d60 | 2017-06-21 17:29:40 +0100 | [diff] [blame] | 1249 | // Newton-Raphson division initial estimate X0 calculation |
Georgios Pinitas | 00394ae | 2017-06-22 18:13:55 +0100 | [diff] [blame] | 1250 | qint8x16_t x = vqsubq_qs8(const_48_over_17, vqmulq_qs8(temp, const_32_over_17, fixed_point_position)); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1251 | |
| 1252 | // Set initial guess to one if x > 1 |
| 1253 | uint8x16_t set_one = vcgtq_s8(x, const_one); |
| 1254 | x = vbslq_s8(set_one, const_one, x); |
| 1255 | |
| 1256 | // Use three iterations of Newton-Raphson method to get the result |
Michalis Spyrou | 25466a9 | 2017-08-17 12:56:46 +0100 | [diff] [blame] | 1257 | x = vqmulq_qs8(x, vqsubq_s8(const_two, vqmulq_qs8(temp, x, fixed_point_position)), fixed_point_position); |
| 1258 | x = vqmulq_qs8(x, vqsubq_s8(const_two, vqmulq_qs8(temp, x, fixed_point_position)), fixed_point_position); |
| 1259 | x = vqmulq_qs8(x, vqsubq_s8(const_two, vqmulq_qs8(temp, x, fixed_point_position)), fixed_point_position); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1260 | |
| 1261 | return vqshlq_s8(x, shift_value); |
| 1262 | } |
| 1263 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1264 | inline qint16x8_t vqrecipq_qs16(qint16x8_t a, int fixed_point_position) |
| 1265 | { |
| 1266 | // We need two bits to store 2, thus we can only support formats from Q2.13 to Q15.0 |
| 1267 | const qint16x8_t const_48_over_17 = vdupq_n_s16(0x5A56 >> (13 - fixed_point_position)); // 2.823 |
| 1268 | const qint16x8_t const_32_over_17 = vdupq_n_s16(0x3C3C >> (13 - fixed_point_position)); // 1.8823 |
| 1269 | const qint16x8_t const_one = vdupq_n_s16(1 << fixed_point_position); |
Michalis Spyrou | 25466a9 | 2017-08-17 12:56:46 +0100 | [diff] [blame] | 1270 | const qint16x8_t const_two = vdupq_n_s16(2 << fixed_point_position); |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1271 | |
| 1272 | // Find shift value |
| 1273 | const qint16x8_t shift_value = vqnegq_s16(vqsubq_s16(vdupq_n_s16(16), vqaddq_s16(vclzq_s16(a), vdupq_n_s16(fixed_point_position)))); |
| 1274 | const qint16x8_t temp = vqshlq_s16(a, shift_value); |
| 1275 | |
Michalis Spyrou | bbd3d60 | 2017-06-21 17:29:40 +0100 | [diff] [blame] | 1276 | // Newton-Raphson division initial estimate X0 calculation |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1277 | qint16x8_t x = vqsubq_qs16(const_48_over_17, vqmulq_qs16(temp, const_32_over_17, fixed_point_position)); |
| 1278 | |
| 1279 | // Set initial guess to one if x > 1 |
| 1280 | uint16x8_t set_one = vcgtq_s16(x, const_one); |
| 1281 | x = vbslq_s16(set_one, const_one, x); |
| 1282 | |
Michalis Spyrou | 25466a9 | 2017-08-17 12:56:46 +0100 | [diff] [blame] | 1283 | // Use four iterations of Newton-Raphson method to get the result |
| 1284 | x = vqmulq_qs16(x, vqsubq_s16(const_two, vqmulq_qs16(temp, x, fixed_point_position)), fixed_point_position); |
| 1285 | x = vqmulq_qs16(x, vqsubq_s16(const_two, vqmulq_qs16(temp, x, fixed_point_position)), fixed_point_position); |
| 1286 | x = vqmulq_qs16(x, vqsubq_s16(const_two, vqmulq_qs16(temp, x, fixed_point_position)), fixed_point_position); |
| 1287 | x = vqmulq_qs16(x, vqsubq_s16(const_two, vqmulq_qs16(temp, x, fixed_point_position)), fixed_point_position); |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1288 | |
Georgios Pinitas | 00394ae | 2017-06-22 18:13:55 +0100 | [diff] [blame] | 1289 | // Saturate result in case of overflow |
| 1290 | return vbslq_s16(vceqq_s16(a, vdupq_n_s16(0)), vdupq_n_s16(std::numeric_limits<int16_t>::max()), vqshlq_s16(x, shift_value)); |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1291 | } |
| 1292 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1293 | inline qint8x8_t vdiv_qs8(qint8x8_t a, qint8x8_t b, int fixed_point_position) |
| 1294 | { |
| 1295 | return vmul_qs8(a, vrecip_qs8(b, fixed_point_position), fixed_point_position); |
| 1296 | } |
| 1297 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1298 | inline qint16x4_t vdiv_qs16(qint16x4_t a, qint16x4_t b, int fixed_point_position) |
| 1299 | { |
| 1300 | return vmul_qs16(a, vrecip_qs16(b, fixed_point_position), fixed_point_position); |
| 1301 | } |
| 1302 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1303 | inline qint8x16_t vdivq_qs8(qint8x16_t a, qint8x16_t b, int fixed_point_position) |
| 1304 | { |
| 1305 | return vmulq_qs8(a, vrecipq_qs8(b, fixed_point_position), fixed_point_position); |
| 1306 | } |
| 1307 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1308 | inline qint16x8_t vdivq_qs16(qint16x8_t a, qint16x8_t b, int fixed_point_position) |
| 1309 | { |
| 1310 | return vmulq_qs16(a, vrecipq_qs16(b, fixed_point_position), fixed_point_position); |
| 1311 | } |
| 1312 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1313 | template <bool islog> |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1314 | inline qint8x8_t vtaylor_poly_qs8(qint8x8_t a, int fixed_point_position) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1315 | { |
| 1316 | const qint8x8_t shift_value = vdup_n_s8(-(7 - fixed_point_position)); |
| 1317 | const qint8x8_t const_one = vdup_n_s8(1); |
| 1318 | const qint8x8_t A = vrshl_s8(islog ? log_tab_qs8[0] : exp_tab_qs8[0], islog ? vadd_s8(shift_value, const_one) : shift_value); |
| 1319 | const qint8x8_t B = vrshl_s8(islog ? log_tab_qs8[1] : exp_tab_qs8[1], shift_value); |
| 1320 | const qint8x8_t C = vrshl_s8(islog ? log_tab_qs8[2] : exp_tab_qs8[2], shift_value); |
| 1321 | const qint8x8_t D = vrshl_s8(islog ? log_tab_qs8[3] : exp_tab_qs8[3], shift_value); |
| 1322 | const qint8x8_t x1 = vadd_s8(vmul_qs8(a, D, fixed_point_position), C); |
| 1323 | const qint8x8_t x2 = vadd_s8(vmul_qs8(a, x1, fixed_point_position), B); |
| 1324 | const qint8x8_t x3 = vadd_s8(vmul_qs8(a, x2, fixed_point_position), A); |
| 1325 | const qint8x8_t res = vmul_qs8(a, x3, fixed_point_position); |
| 1326 | return res; |
| 1327 | } |
| 1328 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1329 | template <bool islog> |
| 1330 | inline qint16x4_t vtaylor_poly_qs16(qint16x4_t a, int fixed_point_position) |
| 1331 | { |
| 1332 | const qint16x4_t shift_value = vdup_n_s16(-(15 - fixed_point_position)); |
| 1333 | const qint16x4_t const_one = vdup_n_s16(1); |
| 1334 | const qint16x4_t A = vrshl_s16(islog ? log_tab_qs16[0] : exp_tab_qs16[0], islog ? vadd_s16(shift_value, const_one) : shift_value); |
| 1335 | const qint16x4_t B = vrshl_s16(islog ? log_tab_qs16[1] : exp_tab_qs16[1], shift_value); |
| 1336 | const qint16x4_t C = vrshl_s16(islog ? log_tab_qs16[2] : exp_tab_qs16[2], shift_value); |
| 1337 | const qint16x4_t D = vrshl_s16(islog ? log_tab_qs16[3] : exp_tab_qs16[3], shift_value); |
| 1338 | const qint16x4_t x1 = vadd_s16(vmul_qs16(a, D, fixed_point_position), C); |
| 1339 | const qint16x4_t x2 = vadd_s16(vmul_qs16(a, x1, fixed_point_position), B); |
| 1340 | const qint16x4_t x3 = vadd_s16(vmul_qs16(a, x2, fixed_point_position), A); |
| 1341 | const qint16x4_t res = vmul_qs16(a, x3, fixed_point_position); |
| 1342 | return res; |
| 1343 | } |
| 1344 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1345 | template <bool islog> |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1346 | inline qint8x8_t vqtaylor_poly_qs8(qint8x8_t a, int fixed_point_position) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1347 | { |
| 1348 | const qint8x8_t shift_value = vdup_n_s8(-(7 - fixed_point_position)); |
| 1349 | const qint8x8_t const_one = vdup_n_s8(1); |
| 1350 | const qint8x8_t A = vqrshl_s8(islog ? log_tab_qs8[0] : exp_tab_qs8[0], islog ? vqadd_s8(shift_value, const_one) : shift_value); |
| 1351 | const qint8x8_t B = vqrshl_s8(islog ? log_tab_qs8[1] : exp_tab_qs8[1], shift_value); |
| 1352 | const qint8x8_t C = vqrshl_s8(islog ? log_tab_qs8[2] : exp_tab_qs8[2], shift_value); |
| 1353 | const qint8x8_t D = vqrshl_s8(islog ? log_tab_qs8[3] : exp_tab_qs8[3], shift_value); |
| 1354 | const qint8x8_t x1 = vqadd_s8(vqmul_qs8(a, D, fixed_point_position), C); |
| 1355 | const qint8x8_t x2 = vqadd_s8(vqmul_qs8(a, x1, fixed_point_position), B); |
| 1356 | const qint8x8_t x3 = vqadd_s8(vqmul_qs8(a, x2, fixed_point_position), A); |
| 1357 | const qint8x8_t res = vqmul_qs8(a, x3, fixed_point_position); |
| 1358 | return res; |
| 1359 | } |
| 1360 | |
| 1361 | template <bool islog> |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1362 | inline qint16x4_t vqtaylor_poly_qs16(qint16x4_t a, int fixed_point_position) |
| 1363 | { |
| 1364 | const qint16x4_t shift_value = vdup_n_s16(-(15 - fixed_point_position)); |
| 1365 | const qint16x4_t const_one = vdup_n_s16(1); |
| 1366 | const qint16x4_t A = vqrshl_s16(islog ? log_tab_qs16[0] : exp_tab_qs16[0], islog ? vqadd_s16(shift_value, const_one) : shift_value); |
| 1367 | const qint16x4_t B = vqrshl_s16(islog ? log_tab_qs16[1] : exp_tab_qs16[1], shift_value); |
| 1368 | const qint16x4_t C = vqrshl_s16(islog ? log_tab_qs16[2] : exp_tab_qs16[2], shift_value); |
| 1369 | const qint16x4_t D = vqrshl_s16(islog ? log_tab_qs16[3] : exp_tab_qs16[3], shift_value); |
| 1370 | const qint16x4_t x1 = vqadd_s16(vqmul_qs16(a, D, fixed_point_position), C); |
| 1371 | const qint16x4_t x2 = vqadd_s16(vqmul_qs16(a, x1, fixed_point_position), B); |
| 1372 | const qint16x4_t x3 = vqadd_s16(vqmul_qs16(a, x2, fixed_point_position), A); |
| 1373 | const qint16x4_t res = vqmul_qs16(a, x3, fixed_point_position); |
| 1374 | return res; |
| 1375 | } |
| 1376 | |
| 1377 | template <bool islog> |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1378 | inline qint8x16_t vtaylor_polyq_qs8(qint8x16_t a, int fixed_point_position) |
| 1379 | { |
| 1380 | const qint8x16_t shift_value = vdupq_n_s8(-(7 - fixed_point_position)); |
| 1381 | const qint8x16_t const_one = vdupq_n_s8(1); |
| 1382 | const qint8x16_t A = vrshlq_s8(islog ? log_tabq_qs8[0] : exp_tabq_qs8[0], islog ? vaddq_s8(shift_value, const_one) : shift_value); |
| 1383 | const qint8x16_t B = vrshlq_s8(islog ? log_tabq_qs8[1] : exp_tabq_qs8[1], shift_value); |
| 1384 | const qint8x16_t C = vrshlq_s8(islog ? log_tabq_qs8[2] : exp_tabq_qs8[2], shift_value); |
| 1385 | const qint8x16_t D = vrshlq_s8(islog ? log_tabq_qs8[3] : exp_tabq_qs8[3], shift_value); |
| 1386 | const qint8x16_t x1 = vaddq_s8(vmulq_qs8(a, D, fixed_point_position), C); |
| 1387 | const qint8x16_t x2 = vaddq_s8(vmulq_qs8(a, x1, fixed_point_position), B); |
| 1388 | const qint8x16_t x3 = vaddq_s8(vmulq_qs8(a, x2, fixed_point_position), A); |
| 1389 | const qint8x16_t res = vmulq_qs8(a, x3, fixed_point_position); |
| 1390 | return res; |
| 1391 | } |
| 1392 | |
| 1393 | template <bool islog> |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1394 | inline qint16x8_t vtaylor_polyq_qs16(qint16x8_t a, int fixed_point_position) |
| 1395 | { |
| 1396 | const qint16x8_t shift_value = vdupq_n_s16(-(15 - fixed_point_position)); |
| 1397 | const qint16x8_t const_one = vdupq_n_s16(1); |
| 1398 | const qint16x8_t A = vrshlq_s16(islog ? log_tabq_qs16[0] : exp_tabq_qs16[0], islog ? vaddq_s16(shift_value, const_one) : shift_value); |
| 1399 | const qint16x8_t B = vrshlq_s16(islog ? log_tabq_qs16[1] : exp_tabq_qs16[1], shift_value); |
| 1400 | const qint16x8_t C = vrshlq_s16(islog ? log_tabq_qs16[2] : exp_tabq_qs16[2], shift_value); |
| 1401 | const qint16x8_t D = vrshlq_s16(islog ? log_tabq_qs16[3] : exp_tabq_qs16[3], shift_value); |
| 1402 | const qint16x8_t x1 = vaddq_s16(vmulq_qs16(a, D, fixed_point_position), C); |
| 1403 | const qint16x8_t x2 = vaddq_s16(vmulq_qs16(a, x1, fixed_point_position), B); |
| 1404 | const qint16x8_t x3 = vaddq_s16(vmulq_qs16(a, x2, fixed_point_position), A); |
| 1405 | const qint16x8_t res = vmulq_qs16(a, x3, fixed_point_position); |
| 1406 | return res; |
| 1407 | } |
| 1408 | |
| 1409 | template <bool islog> |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1410 | inline qint8x16_t vqtaylor_polyq_qs8(qint8x16_t a, int fixed_point_position) |
| 1411 | { |
| 1412 | const qint8x16_t shift_value = vdupq_n_s8(-(7 - fixed_point_position)); |
| 1413 | const qint8x16_t const_one = vdupq_n_s8(1); |
| 1414 | const qint8x16_t A = vqrshlq_s8(islog ? log_tabq_qs8[0] : exp_tabq_qs8[0], islog ? vqaddq_s8(shift_value, const_one) : shift_value); |
| 1415 | const qint8x16_t B = vqrshlq_s8(islog ? log_tabq_qs8[1] : exp_tabq_qs8[1], shift_value); |
| 1416 | const qint8x16_t C = vqrshlq_s8(islog ? log_tabq_qs8[2] : exp_tabq_qs8[2], shift_value); |
| 1417 | const qint8x16_t D = vqrshlq_s8(islog ? log_tabq_qs8[3] : exp_tabq_qs8[3], shift_value); |
| 1418 | const qint8x16_t x1 = vqaddq_s8(vqmulq_qs8(a, D, fixed_point_position), C); |
| 1419 | const qint8x16_t x2 = vqaddq_s8(vqmulq_qs8(a, x1, fixed_point_position), B); |
| 1420 | const qint8x16_t x3 = vqaddq_s8(vqmulq_qs8(a, x2, fixed_point_position), A); |
| 1421 | const qint8x16_t res = vqmulq_qs8(a, x3, fixed_point_position); |
| 1422 | return res; |
| 1423 | } |
| 1424 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1425 | template <bool islog> |
| 1426 | inline qint16x8_t vqtaylor_polyq_qs16(qint16x8_t a, int fixed_point_position) |
| 1427 | { |
| 1428 | const qint16x8_t shift_value = vdupq_n_s16(-(15 - fixed_point_position)); |
| 1429 | const qint16x8_t const_one = vdupq_n_s16(1); |
| 1430 | const qint16x8_t A = vqrshlq_s16(islog ? log_tabq_qs16[0] : exp_tabq_qs16[0], islog ? vqaddq_s16(shift_value, const_one) : shift_value); |
| 1431 | const qint16x8_t B = vqrshlq_s16(islog ? log_tabq_qs16[1] : exp_tabq_qs16[1], shift_value); |
| 1432 | const qint16x8_t C = vqrshlq_s16(islog ? log_tabq_qs16[2] : exp_tabq_qs16[2], shift_value); |
| 1433 | const qint16x8_t D = vqrshlq_s16(islog ? log_tabq_qs16[3] : exp_tabq_qs16[3], shift_value); |
| 1434 | const qint16x8_t x1 = vqaddq_s16(vqmulq_qs16(a, D, fixed_point_position), C); |
| 1435 | const qint16x8_t x2 = vqaddq_s16(vqmulq_qs16(a, x1, fixed_point_position), B); |
| 1436 | const qint16x8_t x3 = vqaddq_s16(vqmulq_qs16(a, x2, fixed_point_position), A); |
| 1437 | const qint16x8_t res = vqmulq_qs16(a, x3, fixed_point_position); |
| 1438 | return res; |
| 1439 | } |
| 1440 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1441 | inline qint8x8_t vqexp_qs8(qint8x8_t a, int fixed_point_position) |
| 1442 | { |
| 1443 | const qint8x8_t shift_value = vdup_n_s8(fixed_point_position - 7); |
| 1444 | const qint8x8_t const_one = vdup_n_s8(1 << fixed_point_position); |
| 1445 | const qint8x8_t const_ln2 = vqrshl_s8(vdup_n_s8(0x58), shift_value); // ln(2) |
| 1446 | const qint8x8_t const_inv_ln2 = vorr_s8(vqrshl_s8(vdup_n_s8(0x38), shift_value), const_one); // 1/ln(2) |
| 1447 | |
| 1448 | // Perform range reduction [-log(2),log(2)] |
| 1449 | const qint8x8_t m = vqmul_qs8(a, const_inv_ln2, fixed_point_position); // x / ln(2) |
| 1450 | |
| 1451 | // get decimal part from m |
| 1452 | const qint8x8_t dec_m = vqshl_s8(m, vdup_n_s8(-fixed_point_position)); |
| 1453 | |
| 1454 | qint8x8_t alpha = vqmul_qs8(vqshl_s8(dec_m, vdup_n_s8(fixed_point_position)), const_ln2, fixed_point_position); |
| 1455 | alpha = vqabs_qs8(vqsub_s8(a, alpha)); |
| 1456 | |
| 1457 | // Polynomial Approximation |
| 1458 | qint8x8_t poly = vqtaylor_poly_qs8<false>(alpha, fixed_point_position); |
| 1459 | poly = vqadd_s8(poly, const_one); |
| 1460 | |
| 1461 | // Reconstruct |
| 1462 | poly = vqshl_s8(poly, dec_m); |
| 1463 | |
| 1464 | return poly; |
| 1465 | } |
| 1466 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1467 | inline qint16x4_t vqexp_qs16(qint16x4_t a, int fixed_point_position) |
| 1468 | { |
| 1469 | const qint16x4_t shift_value = vdup_n_s16(fixed_point_position - 15); |
| 1470 | const qint16x4_t const_one = vdup_n_s16(1 << fixed_point_position); |
| 1471 | const qint16x4_t const_ln2 = vqrshl_s16(vdup_n_s16(0x58B9), shift_value); // ln(2) |
| 1472 | const qint16x4_t const_inv_ln2 = vorr_s16(vqrshl_s16(vdup_n_s16(0x38AA), shift_value), const_one); // 1/ln(2) |
| 1473 | |
| 1474 | // Perform range reduction [-log(2),log(2)] |
| 1475 | const qint16x4_t m = vqmul_qs16(a, const_inv_ln2, fixed_point_position); // x / ln(2) |
| 1476 | |
| 1477 | // get decimal part from m |
| 1478 | const qint16x4_t dec_m = vqshl_s16(m, vdup_n_s16(-fixed_point_position)); |
| 1479 | |
| 1480 | qint16x4_t alpha = vqmul_qs16(vqshl_s16(dec_m, vdup_n_s16(fixed_point_position)), const_ln2, fixed_point_position); |
| 1481 | alpha = vqabs_qs16(vqsub_s16(a, alpha)); |
| 1482 | |
| 1483 | // Polynomial Approximation |
| 1484 | qint16x4_t poly = vqtaylor_poly_qs16<false>(alpha, fixed_point_position); |
| 1485 | poly = vqadd_s16(poly, const_one); |
| 1486 | |
| 1487 | // Reconstruct |
| 1488 | poly = vqshl_s16(poly, dec_m); |
| 1489 | |
| 1490 | return poly; |
| 1491 | } |
| 1492 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1493 | inline qint8x16_t vqexpq_qs8(qint8x16_t a, int fixed_point_position) |
| 1494 | { |
| 1495 | const qint8x16_t shift_value = vdupq_n_s8(fixed_point_position - 7); |
| 1496 | const qint8x16_t const_one = vdupq_n_s8(1 << fixed_point_position); |
| 1497 | const qint8x16_t const_ln2 = vqrshlq_s8(vdupq_n_s8(0x58), shift_value); // ln(2) |
| 1498 | const qint8x16_t const_inv_ln2 = vorrq_s8(vqrshlq_s8(vdupq_n_s8(0x38), shift_value), const_one); // 1/ln(2) |
| 1499 | |
| 1500 | // Perform range reduction [-log(2),log(2)] |
| 1501 | const qint8x16_t m = vqmulq_qs8(a, const_inv_ln2, fixed_point_position); // x / ln(2) |
| 1502 | |
| 1503 | // get decimal part from m |
| 1504 | const qint8x16_t dec_m = vqshlq_s8(m, vdupq_n_s8(-fixed_point_position)); |
| 1505 | |
| 1506 | qint8x16_t alpha = vqmulq_qs8(vqshlq_s8(dec_m, vdupq_n_s8(fixed_point_position)), const_ln2, fixed_point_position); |
| 1507 | alpha = vqabsq_qs8(vqsubq_qs8(a, alpha)); |
| 1508 | |
| 1509 | // Polynomial Approximation |
| 1510 | qint8x16_t poly = vqtaylor_polyq_qs8<false>(alpha, fixed_point_position); |
| 1511 | poly = vqaddq_s8(poly, const_one); |
| 1512 | |
| 1513 | // Reconstruct |
| 1514 | poly = vqshlq_s8(poly, dec_m); |
| 1515 | |
| 1516 | return poly; |
| 1517 | } |
| 1518 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1519 | inline qint16x8_t vqexpq_qs16(qint16x8_t a, int fixed_point_position) |
| 1520 | { |
| 1521 | const qint16x8_t shift_value = vdupq_n_s16(fixed_point_position - 15); |
| 1522 | const qint16x8_t const_one = vdupq_n_s16(1 << fixed_point_position); |
| 1523 | const qint16x8_t const_ln2 = vqrshlq_s16(vdupq_n_s16(0x58B9), shift_value); // ln(2) |
| 1524 | const qint16x8_t const_inv_ln2 = vorrq_s16(vqrshlq_s16(vdupq_n_s16(0x38AA), shift_value), const_one); // 1/ln(2) |
| 1525 | |
| 1526 | // Perform range reduction [-log(2),log(2)] |
| 1527 | const qint16x8_t m = vqmulq_qs16(a, const_inv_ln2, fixed_point_position); // x / ln(2) |
| 1528 | |
| 1529 | // get decimal part from m |
| 1530 | const qint16x8_t dec_m = vqshlq_s16(m, vdupq_n_s16(-fixed_point_position)); |
| 1531 | |
| 1532 | qint16x8_t alpha = vqmulq_qs16(vqshlq_s16(dec_m, vdupq_n_s16(fixed_point_position)), const_ln2, fixed_point_position); |
| 1533 | alpha = vqabsq_qs16(vqsubq_qs16(a, alpha)); |
| 1534 | |
| 1535 | // Polynomial Approximation |
| 1536 | qint16x8_t poly = vqtaylor_polyq_qs16<false>(alpha, fixed_point_position); |
| 1537 | poly = vqaddq_s16(poly, const_one); |
| 1538 | |
| 1539 | // Reconstruct |
| 1540 | poly = vqshlq_s16(poly, dec_m); |
| 1541 | |
| 1542 | return poly; |
| 1543 | } |
| 1544 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1545 | inline qint8x8_t vlog_qs8(qint8x8_t a, int fixed_point_position) |
| 1546 | { |
| 1547 | const qint8x8_t const_one = vdup_n_s8(1 << fixed_point_position); |
| 1548 | const qint8x8_t const_seven_dec = vdup_n_s8(7); |
| 1549 | const qint8x8_t const_ln2 = vdup_n_s8(0x58 >> (7 - fixed_point_position)); // ln(2) |
| 1550 | |
| 1551 | // If 0 < a < 1, calculate log(1/x) |
| 1552 | uint8x8_t calc_reciprocal = vclt_s8(a, const_one); |
| 1553 | qint8x8_t recip = vdup_n_s8(0); |
| 1554 | recip = vbsl_s8(calc_reciprocal, recip, a); |
| 1555 | |
| 1556 | // Calculate reciprocal |
| 1557 | recip = vrecip_qs8(recip, fixed_point_position); |
| 1558 | a = vbsl_s8(calc_reciprocal, recip, a); |
| 1559 | |
| 1560 | // Get decimal part of a |
| 1561 | qint8x8_t shift_value = vdup_n_s8(-fixed_point_position); |
| 1562 | qint8x8_t dec_a = vshl_s8(a, shift_value); // a >> fixed_point_position |
| 1563 | |
| 1564 | // Get exponent of 2^n which is equal or less than dec_a |
| 1565 | shift_value = vsub_s8(const_seven_dec, vclz_s8(dec_a)); |
| 1566 | |
| 1567 | // Get x to range (1, 2] |
| 1568 | const qint8x8_t shift_value_neg = vneg_s8(shift_value); |
| 1569 | const qint8x8_t temp = vsub_s8(vrshl_s8(a, shift_value_neg), const_one); |
| 1570 | const qint8x8_t sum = vmul_s8(shift_value, const_one); |
| 1571 | |
| 1572 | // Polynomial Approximation |
| 1573 | qint8x8_t poly = vtaylor_poly_qs8<true>(temp, fixed_point_position); |
| 1574 | |
| 1575 | // Reconstruct |
| 1576 | poly = vmul_qs8(vadd_s8(poly, sum), const_ln2, fixed_point_position); |
| 1577 | |
| 1578 | // Set negative value for 0 < a < 1 |
| 1579 | poly = vbsl_s8(calc_reciprocal, vneg_s8(poly), poly); |
| 1580 | |
| 1581 | return poly; |
| 1582 | } |
| 1583 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1584 | inline qint16x4_t vlog_qs16(qint16x4_t a, int fixed_point_position) |
| 1585 | { |
| 1586 | const qint16x4_t const_one = vdup_n_s16(1 << fixed_point_position); |
| 1587 | const qint16x4_t const_fifteen_dec = vdup_n_s16(15); |
| 1588 | const qint16x4_t const_ln2 = vdup_n_s16(0x58B9 >> (15 - fixed_point_position)); // ln(2) |
| 1589 | |
| 1590 | // If 0 < a < 1, calculate log(1/x) |
| 1591 | uint16x4_t calc_reciprocal = vclt_s16(a, const_one); |
| 1592 | qint16x4_t recip = vdup_n_s16(0); |
| 1593 | recip = vbsl_s16(calc_reciprocal, recip, a); |
| 1594 | |
| 1595 | // Calculate reciprocal |
| 1596 | recip = vrecip_qs16(recip, fixed_point_position); |
| 1597 | a = vbsl_s16(calc_reciprocal, recip, a); |
| 1598 | |
| 1599 | // Get decimal part of a |
| 1600 | qint16x4_t shift_value = vdup_n_s16(-fixed_point_position); |
| 1601 | qint16x4_t dec_a = vshl_s16(a, shift_value); // a >> fixed_point_position |
| 1602 | |
| 1603 | // Get exponent of 2^n which is equal or less than dec_a |
| 1604 | shift_value = vsub_s16(const_fifteen_dec, vclz_s16(dec_a)); |
| 1605 | |
| 1606 | // Get x to range (1, 2] |
| 1607 | const qint16x4_t shift_value_neg = vneg_s16(shift_value); |
| 1608 | const qint16x4_t temp = vsub_s16(vrshl_s16(a, shift_value_neg), const_one); |
| 1609 | const qint16x4_t sum = vmul_s16(shift_value, const_one); |
| 1610 | |
| 1611 | // Polynomial Approximation |
| 1612 | qint16x4_t poly = vtaylor_poly_qs16<true>(temp, fixed_point_position); |
| 1613 | |
| 1614 | // Reconstruct |
| 1615 | poly = vmul_qs16(vadd_s16(poly, sum), const_ln2, fixed_point_position); |
| 1616 | |
| 1617 | // Set negative value for 0 < a < 1 |
| 1618 | poly = vbsl_s16(calc_reciprocal, vneg_s16(poly), poly); |
| 1619 | |
| 1620 | return poly; |
| 1621 | } |
| 1622 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1623 | inline qint8x16_t vlogq_qs8(qint8x16_t a, int fixed_point_position) |
| 1624 | { |
| 1625 | const qint8x16_t const_one = vdupq_n_s8(1 << fixed_point_position); |
| 1626 | const qint8x16_t const_seven_dec = vdupq_n_s8(7); |
| 1627 | const qint8x16_t const_ln2 = vdupq_n_s8(0x58 >> (7 - fixed_point_position)); // ln(2) |
| 1628 | |
| 1629 | // If 0 < a < 1, calculate log(1/x) |
| 1630 | uint8x16_t calc_reciprocal = vcltq_s8(a, const_one); |
| 1631 | qint8x16_t recip = vdupq_n_s8(0); |
| 1632 | recip = vbslq_s8(calc_reciprocal, a, recip); |
| 1633 | |
| 1634 | // Calculate reciprocal |
| 1635 | recip = vrecipq_qs8(recip, fixed_point_position); |
| 1636 | a = vbslq_s8(calc_reciprocal, recip, a); |
| 1637 | |
| 1638 | // Get decimal part of a |
| 1639 | qint8x16_t shift_value = vdupq_n_s8(-fixed_point_position); |
| 1640 | qint8x16_t dec_a = vshlq_s8(a, shift_value); // a >> fixed_point_position |
| 1641 | |
| 1642 | // Get exponent of 2^n which is equal or less than dec_a |
| 1643 | shift_value = vsubq_s8(const_seven_dec, vclzq_s8(dec_a)); |
| 1644 | |
| 1645 | // Get x to range (1, 2] |
| 1646 | const qint8x16_t shift_value_neg = vnegq_s8(shift_value); |
| 1647 | const qint8x16_t temp = vsubq_s8(vrshlq_s8(a, shift_value_neg), const_one); |
| 1648 | const qint8x16_t sum = vmulq_s8(shift_value, const_one); |
| 1649 | |
| 1650 | // Polynomial Approximation |
| 1651 | qint8x16_t poly = vtaylor_polyq_qs8<true>(temp, fixed_point_position); |
| 1652 | |
| 1653 | // Reconstruct |
| 1654 | poly = vmulq_qs8(vaddq_s8(poly, sum), const_ln2, fixed_point_position); |
| 1655 | |
| 1656 | // Set negative value for 0 < a < 1 |
| 1657 | poly = vbslq_s8(calc_reciprocal, vnegq_s8(poly), poly); |
| 1658 | |
| 1659 | return poly; |
| 1660 | } |
| 1661 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1662 | inline qint16x8_t vlogq_qs16(qint16x8_t a, int fixed_point_position) |
| 1663 | { |
| 1664 | const qint16x8_t const_one = vdupq_n_s16(1 << fixed_point_position); |
| 1665 | const qint16x8_t const_fifteen_dec = vdupq_n_s16(15); |
| 1666 | const qint16x8_t const_ln2 = vdupq_n_s16(0x58B9 >> (15 - fixed_point_position)); // ln(2) |
| 1667 | |
| 1668 | // If 0 < a < 1, calculate log(1/x) |
| 1669 | uint16x8_t calc_reciprocal = vcltq_s16(a, const_one); |
| 1670 | qint16x8_t recip = vdupq_n_s16(0); |
| 1671 | recip = vbslq_s16(calc_reciprocal, a, recip); |
| 1672 | |
| 1673 | // Calculate reciprocal |
| 1674 | recip = vqrecipq_qs16(recip, fixed_point_position); |
| 1675 | a = vbslq_s16(calc_reciprocal, recip, a); |
| 1676 | |
| 1677 | // Get decimal part of a |
| 1678 | qint16x8_t shift_value = vdupq_n_s16(-fixed_point_position); |
| 1679 | qint16x8_t dec_a = vshlq_s16(a, shift_value); // a >> fixed_point_position |
| 1680 | |
| 1681 | // Get exponent of 2^n which is equal or less than dec_a |
| 1682 | shift_value = vqsubq_s16(const_fifteen_dec, vclzq_s16(dec_a)); |
| 1683 | |
| 1684 | // Get x to range (1, 2] |
| 1685 | const qint16x8_t shift_value_neg = vnegq_s16(shift_value); |
| 1686 | const qint16x8_t temp = vqsubq_s16(vrshlq_s16(a, shift_value_neg), const_one); |
| 1687 | const qint16x8_t sum = vmulq_s16(shift_value, const_one); |
| 1688 | |
| 1689 | // Polynomial Approximation |
| 1690 | qint16x8_t poly = vtaylor_polyq_qs16<true>(temp, fixed_point_position); |
| 1691 | |
| 1692 | // Reconstruct |
| 1693 | poly = vqmulq_qs16(vqaddq_s16(poly, sum), const_ln2, fixed_point_position); |
| 1694 | |
| 1695 | // Set negative value for 0 < a < 1 |
| 1696 | poly = vbslq_s16(calc_reciprocal, vnegq_s16(poly), poly); |
| 1697 | |
| 1698 | return poly; |
| 1699 | } |
| 1700 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1701 | inline qint8x8_t vinvsqrt_qs8(qint8x8_t a, int fixed_point_position) |
| 1702 | { |
| 1703 | const qint8x8_t const_three = vdup_n_s8(3 << fixed_point_position); |
| 1704 | |
| 1705 | // Find shift value. Number must be in (0.5, 2) range. |
| 1706 | qint8x8_t shift_value = vneg_s8(vsub_s8(vdup_n_s8(8), vadd_s8(vclz_s8(a), vdup_n_s8(fixed_point_position)))); |
| 1707 | |
| 1708 | // Add one when the shift value is negative in order to get the correct result when we shift right with 1 |
| 1709 | qint8x8_t temp = vsub_s8(vdup_n_s8(8), vadd_s8(vclz_s8(a), vdup_n_s8(fixed_point_position))); |
| 1710 | uint8x8_t temp_ltz = vclt_s8(temp, vdup_n_qs8(0)); |
| 1711 | temp = vbsl_s8(temp_ltz, vadd_s8(temp, vdup_n_s8(1)), temp); |
| 1712 | qint8x8_t shift_value2 = vneg_s8(vshr_n_s8(temp, 1)); |
| 1713 | |
| 1714 | temp = vshl_s8(a, shift_value); |
| 1715 | |
| 1716 | // Initial guess |
| 1717 | qint8x8_t x = temp; |
| 1718 | |
| 1719 | // Calculate (x / 2) * (3 - a * x^2) |
| 1720 | // After three iterations we have the result for 8 bit |
| 1721 | x = vshr_n_s8(vmul_qs8(x, vsub_s8(const_three, vmul_qs8(temp, vmul_qs8(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1722 | x = vshr_n_s8(vmul_qs8(x, vsub_s8(const_three, vmul_qs8(temp, vmul_qs8(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1723 | x = vshr_n_s8(vmul_qs8(x, vsub_s8(const_three, vmul_qs8(temp, vmul_qs8(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1724 | |
| 1725 | return vshl_s8(x, shift_value2); |
| 1726 | } |
| 1727 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1728 | inline qint16x4_t vinvsqrt_qs16(qint16x4_t a, int fixed_point_position) |
| 1729 | { |
| 1730 | const qint16x4_t const_three = vdup_n_s16(3 << fixed_point_position); |
| 1731 | |
| 1732 | // Find shift value. Number must be in (0.5, 2) range. |
| 1733 | qint16x4_t shift_value = vneg_s16(vsub_s16(vdup_n_s16(16), vadd_s16(vclz_s16(a), vdup_n_s16(fixed_point_position)))); |
| 1734 | |
| 1735 | // Add one when the shift value is negative in order to get the correct result when we shift right with 1 |
| 1736 | qint16x4_t temp = vsub_s16(vdup_n_s16(16), vadd_s16(vclz_s16(a), vdup_n_s16(fixed_point_position))); |
| 1737 | uint16x4_t temp_ltz = vclt_s16(temp, vdup_n_qs16(0)); |
| 1738 | temp = vbsl_s16(temp_ltz, vadd_s16(temp, vdup_n_s16(1)), temp); |
| 1739 | qint16x4_t shift_value2 = vneg_s16(vshr_n_s16(temp, 1)); |
| 1740 | |
| 1741 | temp = vshl_s16(a, shift_value); |
| 1742 | |
| 1743 | // Initial guess |
| 1744 | qint16x4_t x = temp; |
| 1745 | |
| 1746 | // Calculate (x / 2) * (3 - a * x^2) |
| 1747 | // After five iterations we have the result for 8 bit |
| 1748 | x = vshr_n_s16(vmul_qs16(x, vsub_s16(const_three, vmul_qs16(temp, vmul_qs16(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1749 | x = vshr_n_s16(vmul_qs16(x, vsub_s16(const_three, vmul_qs16(temp, vmul_qs16(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1750 | x = vshr_n_s16(vmul_qs16(x, vsub_s16(const_three, vmul_qs16(temp, vmul_qs16(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1751 | x = vshr_n_s16(vmul_qs16(x, vsub_s16(const_three, vmul_qs16(temp, vmul_qs16(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1752 | x = vshr_n_s16(vmul_qs16(x, vsub_s16(const_three, vmul_qs16(temp, vmul_qs16(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1753 | |
| 1754 | return vshl_s16(x, shift_value2); |
| 1755 | } |
| 1756 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1757 | inline qint8x8_t vqinvsqrt_qs8(qint8x8_t a, int fixed_point_position) |
| 1758 | { |
| 1759 | const qint8x8_t const_three = vdup_n_s8(3 << fixed_point_position); |
| 1760 | |
| 1761 | // Find shift value. Number must be in (0.5, 2) range. |
Georgios Pinitas | ccc65d4 | 2017-06-27 17:39:11 +0100 | [diff] [blame] | 1762 | qint8x8_t shift_value = vqneg_s8(vqsub_s8(vdup_n_s8(8), vqadd_s8(vclz_s8(a), vdup_n_s8(fixed_point_position)))); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1763 | |
| 1764 | // Add one when the shift value is negative in order to get the correct result when we shift right with 1 |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1765 | qint8x8_t temp = vqsub_s8(vdup_n_s8(8), vqadd_s8(vclz_s8(a), vdup_n_s8(fixed_point_position))); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1766 | uint8x8_t temp_ltz = vclt_s8(temp, vdup_n_qs8(0)); |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1767 | temp = vbsl_s8(temp_ltz, vqadd_s8(temp, vdup_n_s8(1)), temp); |
Georgios Pinitas | ccc65d4 | 2017-06-27 17:39:11 +0100 | [diff] [blame] | 1768 | qint8x8_t shift_value2 = vqneg_s8(vshr_n_s8(temp, 1)); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1769 | |
Georgios Pinitas | ccc65d4 | 2017-06-27 17:39:11 +0100 | [diff] [blame] | 1770 | temp = vqshl_s8(a, shift_value); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1771 | |
| 1772 | // Initial guess |
| 1773 | qint8x8_t x = temp; |
| 1774 | |
| 1775 | // Calculate (x / 2) * (3 - a * x^2) |
| 1776 | // After three iterations we have the result for 8 bit |
| 1777 | x = vshr_n_s8(vqmul_qs8(x, vqsub_s8(const_three, vqmul_qs8(temp, vqmul_qs8(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1778 | x = vshr_n_s8(vqmul_qs8(x, vqsub_s8(const_three, vqmul_qs8(temp, vqmul_qs8(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1779 | x = vshr_n_s8(vqmul_qs8(x, vqsub_s8(const_three, vqmul_qs8(temp, vqmul_qs8(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1780 | |
Georgios Pinitas | ccc65d4 | 2017-06-27 17:39:11 +0100 | [diff] [blame] | 1781 | return vqshl_s8(x, shift_value2); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1782 | } |
| 1783 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1784 | inline qint16x4_t vqinvsqrt_qs16(qint16x4_t a, int fixed_point_position) |
| 1785 | { |
| 1786 | const qint16x4_t const_three = vdup_n_s16(3 << fixed_point_position); |
| 1787 | |
| 1788 | // Find shift value. Number must be in (0.5, 2) range. |
Georgios Pinitas | ccc65d4 | 2017-06-27 17:39:11 +0100 | [diff] [blame] | 1789 | qint16x4_t shift_value = vqneg_s16(vqsub_s16(vdup_n_s16(16), vqadd_s16(vclz_s16(a), vdup_n_s16(fixed_point_position)))); |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1790 | |
| 1791 | // Add one when the shift value is negative in order to get the correct result when we shift right with 1 |
| 1792 | qint16x4_t temp = vqsub_s16(vdup_n_s16(16), vqadd_s16(vclz_s16(a), vdup_n_s16(fixed_point_position))); |
| 1793 | uint16x4_t temp_ltz = vclt_s16(temp, vdup_n_qs16(0)); |
| 1794 | temp = vbsl_s16(temp_ltz, vqadd_s16(temp, vdup_n_s16(1)), temp); |
Georgios Pinitas | ccc65d4 | 2017-06-27 17:39:11 +0100 | [diff] [blame] | 1795 | qint16x4_t shift_value2 = vqneg_s16(vshr_n_s16(temp, 1)); |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1796 | |
Georgios Pinitas | ccc65d4 | 2017-06-27 17:39:11 +0100 | [diff] [blame] | 1797 | temp = vqshl_s16(a, shift_value); |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1798 | |
| 1799 | // Initial guess |
| 1800 | qint16x4_t x = temp; |
| 1801 | |
| 1802 | // Calculate (x / 2) * (3 - a * x^2) |
| 1803 | // After five iterations we have the result for 16 bit |
| 1804 | x = vshr_n_s16(vqmul_qs16(x, vqsub_s16(const_three, vqmul_qs16(temp, vqmul_qs16(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1805 | x = vshr_n_s16(vqmul_qs16(x, vqsub_s16(const_three, vqmul_qs16(temp, vqmul_qs16(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1806 | x = vshr_n_s16(vqmul_qs16(x, vqsub_s16(const_three, vqmul_qs16(temp, vqmul_qs16(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1807 | x = vshr_n_s16(vqmul_qs16(x, vqsub_s16(const_three, vqmul_qs16(temp, vqmul_qs16(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1808 | x = vshr_n_s16(vqmul_qs16(x, vqsub_s16(const_three, vqmul_qs16(temp, vqmul_qs16(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1809 | |
| 1810 | return vqshl_s16(x, shift_value2); |
| 1811 | } |
| 1812 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1813 | inline qint8x16_t vinvsqrtq_qs8(qint8x16_t a, int fixed_point_position) |
| 1814 | { |
| 1815 | const qint8x16_t const_three = vdupq_n_s8(3 << fixed_point_position); |
| 1816 | |
| 1817 | // Find shift value. Number must be in (0.5, 2) range. |
| 1818 | qint8x16_t shift_value = vnegq_s8(vsubq_s8(vdupq_n_s8(8), vaddq_s8(vclzq_s8(a), vdupq_n_s8(fixed_point_position)))); |
| 1819 | |
| 1820 | // Add one when the shift value is negative in order to get the correct result when we shift right with 1 |
| 1821 | qint8x16_t temp = vsubq_s8(vdupq_n_s8(8), vaddq_s8(vclzq_s8(a), vdupq_n_s8(fixed_point_position))); |
| 1822 | uint8x16_t temp_ltz = vcltq_s8(temp, vdupq_n_qs8(0)); |
| 1823 | temp = vbslq_s8(temp_ltz, vaddq_s8(temp, vdupq_n_s8(1)), temp); |
| 1824 | qint8x16_t shift_value2 = vnegq_s8(vshrq_n_s8(temp, 1)); |
| 1825 | |
| 1826 | temp = vshlq_s8(a, shift_value); |
| 1827 | |
| 1828 | // Initial guess |
| 1829 | qint8x16_t x = temp; |
| 1830 | |
| 1831 | // Calculate (x / 2) * (3 - a * x^2) |
| 1832 | // After three iterations we have the result for 8 bit |
| 1833 | x = vshrq_n_s8(vmulq_qs8(x, vsubq_s8(const_three, vmulq_qs8(temp, vmulq_qs8(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1834 | x = vshrq_n_s8(vmulq_qs8(x, vsubq_s8(const_three, vmulq_qs8(temp, vmulq_qs8(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1835 | x = vshrq_n_s8(vmulq_qs8(x, vsubq_s8(const_three, vmulq_qs8(temp, vmulq_qs8(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1836 | |
| 1837 | return vshlq_s8(x, shift_value2); |
| 1838 | } |
| 1839 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1840 | inline qint16x8_t vinvsqrtq_qs16(qint16x8_t a, int fixed_point_position) |
| 1841 | { |
| 1842 | const qint16x8_t const_three = vdupq_n_s16(3 << fixed_point_position); |
| 1843 | |
| 1844 | // Find shift value. Number must be in (0.5, 2) range. |
| 1845 | qint16x8_t shift_value = vnegq_s16(vsubq_s16(vdupq_n_s16(16), vaddq_s16(vclzq_s16(a), vdupq_n_s16(fixed_point_position)))); |
| 1846 | |
| 1847 | // Add one when the shift value is negative in order to get the correct result when we shift right with 1 |
| 1848 | qint16x8_t temp = vsubq_s16(vdupq_n_s16(16), vaddq_s16(vclzq_s16(a), vdupq_n_s16(fixed_point_position))); |
| 1849 | uint16x8_t temp_ltz = vcltq_s16(temp, vdupq_n_qs16(0)); |
| 1850 | temp = vbslq_s16(temp_ltz, vaddq_s16(temp, vdupq_n_s16(1)), temp); |
| 1851 | qint16x8_t shift_value2 = vnegq_s16(vshrq_n_s16(temp, 1)); |
| 1852 | |
| 1853 | temp = vshlq_s16(a, shift_value); |
| 1854 | |
| 1855 | // Initial guess |
| 1856 | qint16x8_t x = temp; |
| 1857 | |
| 1858 | // Calculate (x / 2) * (3 - a * x^2) |
| 1859 | // After five iterations we have the result for 16 bit |
| 1860 | x = vshrq_n_s16(vmulq_qs16(x, vsubq_s16(const_three, vmulq_qs16(temp, vmulq_qs16(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1861 | x = vshrq_n_s16(vmulq_qs16(x, vsubq_s16(const_three, vmulq_qs16(temp, vmulq_qs16(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1862 | x = vshrq_n_s16(vmulq_qs16(x, vsubq_s16(const_three, vmulq_qs16(temp, vmulq_qs16(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1863 | x = vshrq_n_s16(vmulq_qs16(x, vsubq_s16(const_three, vmulq_qs16(temp, vmulq_qs16(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1864 | x = vshrq_n_s16(vmulq_qs16(x, vsubq_s16(const_three, vmulq_qs16(temp, vmulq_qs16(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1865 | |
| 1866 | return vshlq_s16(x, shift_value2); |
| 1867 | } |
| 1868 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1869 | inline qint8x16_t vqinvsqrtq_qs8(qint8x16_t a, int fixed_point_position) |
| 1870 | { |
| 1871 | const qint8x16_t const_three = vdupq_n_s8(3 << fixed_point_position); |
| 1872 | |
| 1873 | // Find shift value. Number must be in (0.5, 2) range. |
Georgios Pinitas | ccc65d4 | 2017-06-27 17:39:11 +0100 | [diff] [blame] | 1874 | qint8x16_t shift_value = vqnegq_s8(vqsubq_s8(vdupq_n_s8(8), vqaddq_s8(vclzq_s8(a), vdupq_n_s8(fixed_point_position)))); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1875 | |
| 1876 | // Add one when the shift value is negative in order to get the correct result when we shift right with 1 |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1877 | qint8x16_t temp = vqsubq_s8(vdupq_n_s8(8), vqaddq_s8(vclzq_s8(a), vdupq_n_s8(fixed_point_position))); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1878 | uint8x16_t temp_ltz = vcltq_s8(temp, vdupq_n_qs8(0)); |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1879 | temp = vbslq_s8(temp_ltz, vqaddq_s8(temp, vdupq_n_s8(1)), temp); |
Georgios Pinitas | ccc65d4 | 2017-06-27 17:39:11 +0100 | [diff] [blame] | 1880 | qint8x16_t shift_value2 = vqnegq_s8(vshrq_n_s8(temp, 1)); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1881 | |
Georgios Pinitas | ccc65d4 | 2017-06-27 17:39:11 +0100 | [diff] [blame] | 1882 | temp = vqshlq_s8(a, shift_value); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1883 | |
| 1884 | // Initial guess |
| 1885 | qint8x16_t x = temp; |
| 1886 | |
| 1887 | // Calculate (x / 2) * (3 - a * x^2) |
| 1888 | // After three iterations we have the result for 8 bit |
| 1889 | x = vshrq_n_s8(vqmulq_qs8(x, vqsubq_s8(const_three, vqmulq_qs8(temp, vqmulq_qs8(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1890 | x = vshrq_n_s8(vqmulq_qs8(x, vqsubq_s8(const_three, vqmulq_qs8(temp, vqmulq_qs8(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1891 | x = vshrq_n_s8(vqmulq_qs8(x, vqsubq_s8(const_three, vqmulq_qs8(temp, vqmulq_qs8(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1892 | |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1893 | return vqshlq_s8(x, shift_value2); |
| 1894 | } |
| 1895 | |
| 1896 | inline qint16x8_t vqinvsqrtq_qs16(qint16x8_t a, int fixed_point_position) |
| 1897 | { |
| 1898 | const qint16x8_t const_three = vdupq_n_s16(3 << fixed_point_position); |
| 1899 | |
| 1900 | // Find shift value. Number must be in (0.5, 2) range. |
Georgios Pinitas | ccc65d4 | 2017-06-27 17:39:11 +0100 | [diff] [blame] | 1901 | qint16x8_t shift_value = vqnegq_s16(vqsubq_s16(vdupq_n_s16(16), vqaddq_s16(vclzq_s16(a), vdupq_n_s16(fixed_point_position)))); |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1902 | |
| 1903 | // Add one when the shift value is negative in order to get the correct result when we shift right with 1 |
| 1904 | qint16x8_t temp = vqsubq_s16(vdupq_n_s16(16), vqaddq_s16(vclzq_s16(a), vdupq_n_s16(fixed_point_position))); |
| 1905 | uint16x8_t temp_ltz = vcltq_s16(temp, vdupq_n_qs16(0)); |
| 1906 | temp = vbslq_s16(temp_ltz, vqaddq_s16(temp, vdupq_n_s16(1)), temp); |
Georgios Pinitas | ccc65d4 | 2017-06-27 17:39:11 +0100 | [diff] [blame] | 1907 | qint16x8_t shift_value2 = vqnegq_s16(vshrq_n_s16(temp, 1)); |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1908 | |
| 1909 | temp = vqshlq_s16(a, shift_value); |
| 1910 | |
| 1911 | // Initial guess |
| 1912 | qint16x8_t x = temp; |
| 1913 | |
| 1914 | // Calculate (x / 2) * (3 - a * x^2) |
| 1915 | // After five iterations we have the result for 16 bit |
| 1916 | x = vshrq_n_s16(vqmulq_qs16(x, vqsubq_s16(const_three, vqmulq_qs16(temp, vqmulq_qs16(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1917 | x = vshrq_n_s16(vqmulq_qs16(x, vqsubq_s16(const_three, vqmulq_qs16(temp, vqmulq_qs16(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1918 | x = vshrq_n_s16(vqmulq_qs16(x, vqsubq_s16(const_three, vqmulq_qs16(temp, vqmulq_qs16(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1919 | x = vshrq_n_s16(vqmulq_qs16(x, vqsubq_s16(const_three, vqmulq_qs16(temp, vqmulq_qs16(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1920 | x = vshrq_n_s16(vqmulq_qs16(x, vqsubq_s16(const_three, vqmulq_qs16(temp, vqmulq_qs16(x, x, fixed_point_position), fixed_point_position)), fixed_point_position), 1); |
| 1921 | |
| 1922 | return vqshlq_s16(x, shift_value2); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1923 | } |
| 1924 | |
Georgios Pinitas | ccc65d4 | 2017-06-27 17:39:11 +0100 | [diff] [blame] | 1925 | inline qint8x8_t vqtanh_qs8(qint8x8_t a, int fixed_point_position) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1926 | { |
| 1927 | const qint8x8_t const_one = vdup_n_s8(1 << fixed_point_position); |
| 1928 | const qint8x8_t const_two = vdup_n_s8(2 << fixed_point_position); |
| 1929 | |
Michalis Spyrou | bbd3d60 | 2017-06-21 17:29:40 +0100 | [diff] [blame] | 1930 | const qint8x8_t exp2x = vqexp_qs8(vqmul_qs8(const_two, a, fixed_point_position), fixed_point_position); |
| 1931 | const qint8x8_t num = vqsub_qs8(exp2x, const_one); |
| 1932 | const qint8x8_t den = vqadd_qs8(exp2x, const_one); |
| 1933 | const qint8x8_t tanh = vqmul_qs8(num, vqrecip_qs8(den, fixed_point_position), fixed_point_position); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1934 | |
| 1935 | return tanh; |
| 1936 | } |
| 1937 | |
Georgios Pinitas | ccc65d4 | 2017-06-27 17:39:11 +0100 | [diff] [blame] | 1938 | inline qint16x4_t vqtanh_qs16(qint16x4_t a, int fixed_point_position) |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1939 | { |
| 1940 | const qint16x4_t const_one = vdup_n_s16(1 << fixed_point_position); |
| 1941 | const qint16x4_t const_two = vdup_n_s16(2 << fixed_point_position); |
| 1942 | |
Michalis Spyrou | bbd3d60 | 2017-06-21 17:29:40 +0100 | [diff] [blame] | 1943 | const qint16x4_t exp2x = vqexp_qs16(vqmul_qs16(const_two, a, fixed_point_position), fixed_point_position); |
| 1944 | const qint16x4_t num = vqsub_qs16(exp2x, const_one); |
| 1945 | const qint16x4_t den = vqadd_qs16(exp2x, const_one); |
| 1946 | const qint16x4_t tanh = vqmul_qs16(num, vqrecip_qs16(den, fixed_point_position), fixed_point_position); |
Michalis Spyrou | 0a8334c | 2017-06-14 18:00:05 +0100 | [diff] [blame] | 1947 | |
| 1948 | return tanh; |
| 1949 | } |
| 1950 | |
Georgios Pinitas | ccc65d4 | 2017-06-27 17:39:11 +0100 | [diff] [blame] | 1951 | inline qint8x16_t vqtanhq_qs8(qint8x16_t a, int fixed_point_position) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1952 | { |
| 1953 | const qint8x16_t const_one = vdupq_n_s8(1 << fixed_point_position); |
| 1954 | const qint8x16_t const_two = vdupq_n_s8(2 << fixed_point_position); |
| 1955 | |
Michalis Spyrou | bbd3d60 | 2017-06-21 17:29:40 +0100 | [diff] [blame] | 1956 | const qint8x16_t exp2x = vqexpq_qs8(vqmulq_qs8(const_two, a, fixed_point_position), fixed_point_position); |
| 1957 | const qint8x16_t num = vqsubq_qs8(exp2x, const_one); |
| 1958 | const qint8x16_t den = vqaddq_qs8(exp2x, const_one); |
| 1959 | const qint8x16_t tanh = vqmulq_qs8(num, vqrecipq_qs8(den, fixed_point_position), fixed_point_position); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1960 | |
| 1961 | return tanh; |
| 1962 | } |
| 1963 | |
Georgios Pinitas | ccc65d4 | 2017-06-27 17:39:11 +0100 | [diff] [blame] | 1964 | inline qint16x8_t vqtanhq_qs16(qint16x8_t a, int fixed_point_position) |
| 1965 | { |
| 1966 | const qint16x8_t const_one = vdupq_n_s16(1 << fixed_point_position); |
| 1967 | const qint16x8_t const_two = vdupq_n_s16(2 << fixed_point_position); |
| 1968 | |
Michalis Spyrou | bbd3d60 | 2017-06-21 17:29:40 +0100 | [diff] [blame] | 1969 | const qint16x8_t exp2x = vqexpq_qs16(vqmulq_qs16(const_two, a, fixed_point_position), fixed_point_position); |
| 1970 | const qint16x8_t num = vqsubq_qs16(exp2x, const_one); |
| 1971 | const qint16x8_t den = vqaddq_qs16(exp2x, const_one); |
| 1972 | const qint16x8_t tanh = vqmulq_qs16(num, vqrecipq_qs16(den, fixed_point_position), fixed_point_position); |
Georgios Pinitas | ccc65d4 | 2017-06-27 17:39:11 +0100 | [diff] [blame] | 1973 | |
| 1974 | return tanh; |
| 1975 | } |
| 1976 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1977 | inline qint8x16_t vqpowq_qs8(qint8x16_t a, qint8x16_t b, int fixed_point_position) |
| 1978 | { |
| 1979 | return vqexpq_qs8(vqmulq_qs8(b, vlogq_qs8(a, fixed_point_position), fixed_point_position), fixed_point_position); |
| 1980 | } |
Michele Di Giorgio | 8af2dd6 | 2017-06-19 15:19:29 +0100 | [diff] [blame] | 1981 | |
Michele Di Giorgio | d5e65c7 | 2017-07-26 17:09:17 +0100 | [diff] [blame] | 1982 | inline qint16x8_t vqpowq_qs16(qint16x8_t a, qint16x8_t b, int fixed_point_position) |
| 1983 | { |
| 1984 | return vqexpq_qs16(vqmulq_qs16(b, vlogq_qs16(a, fixed_point_position), fixed_point_position), fixed_point_position); |
| 1985 | } |
| 1986 | |
Michele Di Giorgio | 8af2dd6 | 2017-06-19 15:19:29 +0100 | [diff] [blame] | 1987 | inline float32x4x2_t vmax2q_f32(float32x4x2_t a, float32x4x2_t b) |
| 1988 | { |
| 1989 | float32x4x2_t res = |
| 1990 | { |
| 1991 | { |
| 1992 | vmaxq_f32(a.val[0], b.val[0]), |
| 1993 | vmaxq_f32(a.val[1], b.val[1]) |
| 1994 | } |
| 1995 | }; |
| 1996 | return res; |
| 1997 | } |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1998 | } |