1 /****************************************************************************** 2 * 3 * Copyright 2022 Google LLC 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at: 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 ******************************************************************************/ 18 19 #if __ARM_NEON && __ARM_ARCH_ISA_A64 && \ 20 !defined(TEST_ARM) || defined(TEST_NEON) 21 22 #ifndef TEST_NEON 23 #include <arm_neon.h> 24 #endif /* TEST_NEON */ 25 26 27 /** 28 * Import 29 */ 30 31 static inline int32_t filter_hp50(struct lc3_ltpf_hp50_state *, int32_t); 32 33 34 /** 35 * Resample from 16 Khz to 12.8 KHz 36 */ 37 #ifndef resample_16k_12k8 38 39 LC3_HOT static void neon_resample_16k_12k8( 40 struct lc3_ltpf_hp50_state *hp50, const int16_t *x, int16_t *y, int n) 41 { 42 static const int16_t h[4][20] = { 43 44 { -61, 214, -398, 417, 0, -1052, 2686, -4529, 5997, 26233, 45 5997, -4529, 2686, -1052, 0, 417, -398, 214, -61, 0 }, 46 47 { -79, 180, -213, 0, 598, -1522, 2389, -2427, 0, 24506, 48 13068, -5289, 1873, 0, -752, 763, -457, 156, 0, -28 }, 49 50 { -61, 92, 0, -323, 861, -1361, 1317, 0, -3885, 19741, 51 19741, -3885, 0, 1317, -1361, 861, -323, 0, 92, -61 }, 52 53 { -28, 0, 156, -457, 763, -752, 0, 1873, -5289, 13068, 54 24506, 0, -2427, 2389, -1522, 598, 0, -213, 180, -79 }, 55 56 }; 57 58 x -= 20 - 1; 59 60 for (int i = 0; i < 5*n; i += 5) { 61 const int16_t *hn = h[i & 3]; 62 const int16_t *xn = x + (i >> 2); 63 int32x4_t un; 64 65 un = vmull_s16( vld1_s16(xn), vld1_s16(hn)), xn += 4, hn += 4; 66 un = vmlal_s16(un, vld1_s16(xn), vld1_s16(hn)), xn += 4, hn += 4; 67 un = vmlal_s16(un, vld1_s16(xn), vld1_s16(hn)), xn += 4, hn += 4; 68 un = vmlal_s16(un, vld1_s16(xn), vld1_s16(hn)), xn += 4, hn += 4; 69 un = vmlal_s16(un, vld1_s16(xn), vld1_s16(hn)), xn += 4, hn += 4; 70 71 int32_t yn = filter_hp50(hp50, vaddvq_s32(un)); 72 *(y++) = (yn + (1 << 15)) >> 16; 73 } 74 } 75 76 #ifndef TEST_NEON 77 #define resample_16k_12k8 neon_resample_16k_12k8 78 #endif 79 80 #endif /* resample_16k_12k8 */ 81 82 /** 83 * Resample from 32 Khz to 12.8 KHz 84 */ 85 #ifndef resample_32k_12k8 86 87 LC3_HOT static void neon_resample_32k_12k8( 88 struct lc3_ltpf_hp50_state *hp50, const int16_t *x, int16_t *y, int n) 89 { 90 x -= 40 - 1; 91 92 static const int16_t h[2][40] = { 93 94 { -30, -31, 46, 107, 0, -199, -162, 209, 430, 0, 95 -681, -526, 658, 1343, 0, -2264, -1943, 2999, 9871, 13116, 96 9871, 2999, -1943, -2264, 0, 1343, 658, -526, -681, 0, 97 430, 209, -162, -199, 0, 107, 46, -31, -30, 0 }, 98 99 { -14, -39, 0, 90, 78, -106, -229, 0, 382, 299, 100 -376, -761, 0, 1194, 937, -1214, -2644, 0, 6534, 12253, 101 12253, 6534, 0, -2644, -1214, 937, 1194, 0, -761, -376, 102 299, 382, 0, -229, -106, 78, 90, 0, -39, -14 }, 103 104 }; 105 106 for (int i = 0; i < 5*n; i += 5) { 107 const int16_t *hn = h[i & 1]; 108 const int16_t *xn = x + (i >> 1); 109 110 int32x4_t un = vmull_s16(vld1_s16(xn), vld1_s16(hn)); 111 xn += 4, hn += 4; 112 113 for (int i = 1; i < 10; i++) 114 un = vmlal_s16(un, vld1_s16(xn), vld1_s16(hn)), xn += 4, hn += 4; 115 116 int32_t yn = filter_hp50(hp50, vaddvq_s32(un)); 117 *(y++) = (yn + (1 << 15)) >> 16; 118 } 119 } 120 121 #ifndef TEST_NEON 122 #define resample_32k_12k8 neon_resample_32k_12k8 123 #endif 124 125 #endif /* resample_32k_12k8 */ 126 127 /** 128 * Resample from 48 Khz to 12.8 KHz 129 */ 130 #ifndef resample_48k_12k8 131 132 LC3_HOT static void neon_resample_48k_12k8( 133 struct lc3_ltpf_hp50_state *hp50, const int16_t *x, int16_t *y, int n) 134 { 135 static const int16_t alignas(16) h[4][64] = { 136 137 { -13, -25, -20, 10, 51, 71, 38, -47, -133, -145, 138 -42, 139, 277, 242, 0, -329, -511, -351, 144, 698, 139 895, 450, -535, -1510, -1697, -521, 1999, 5138, 7737, 8744, 140 7737, 5138, 1999, -521, -1697, -1510, -535, 450, 895, 698, 141 144, -351, -511, -329, 0, 242, 277, 139, -42, -145, 142 -133, -47, 38, 71, 51, 10, -20, -25, -13, 0 }, 143 144 { -9, -23, -24, 0, 41, 71, 52, -23, -115, -152, 145 -78, 92, 254, 272, 76, -251, -493, -427, 0, 576, 146 900, 624, -262, -1309, -1763, -954, 1272, 4356, 7203, 8679, 147 8169, 5886, 2767, 0, -1542, -1660, -809, 240, 848, 796, 148 292, -252, -507, -398, -82, 199, 288, 183, 0, -130, 149 -145, -71, 20, 69, 60, 20, -15, -26, -17, -3 }, 150 151 { -6, -20, -26, -8, 31, 67, 62, 0, -94, -152, 152 -108, 45, 223, 287, 143, -167, -454, -480, -134, 439, 153 866, 758, 0, -1071, -1748, -1295, 601, 3559, 6580, 8485, 154 8485, 6580, 3559, 601, -1295, -1748, -1071, 0, 758, 866, 155 439, -134, -480, -454, -167, 143, 287, 223, 45, -108, 156 -152, -94, 0, 62, 67, 31, -8, -26, -20, -6 }, 157 158 { -3, -17, -26, -15, 20, 60, 69, 20, -71, -145, 159 -130, 0, 183, 288, 199, -82, -398, -507, -252, 292, 160 796, 848, 240, -809, -1660, -1542, 0, 2767, 5886, 8169, 161 8679, 7203, 4356, 1272, -954, -1763, -1309, -262, 624, 900, 162 576, 0, -427, -493, -251, 76, 272, 254, 92, -78, 163 -152, -115, -23, 52, 71, 41, 0, -24, -23, -9 }, 164 165 }; 166 167 x -= 60 - 1; 168 169 for (int i = 0; i < 15*n; i += 15) { 170 const int16_t *hn = h[i & 3]; 171 const int16_t *xn = x + (i >> 2); 172 173 int32x4_t un = vmull_s16(vld1_s16(xn), vld1_s16(hn)); 174 xn += 4, hn += 4; 175 176 for (int i = 1; i < 15; i++) 177 un = vmlal_s16(un, vld1_s16(xn), vld1_s16(hn)), xn += 4, hn += 4; 178 179 int32_t yn = filter_hp50(hp50, vaddvq_s32(un)); 180 *(y++) = (yn + (1 << 15)) >> 16; 181 } 182 } 183 184 #ifndef TEST_NEON 185 #define resample_48k_12k8 neon_resample_48k_12k8 186 #endif 187 188 #endif /* resample_48k_12k8 */ 189 190 /** 191 * Return dot product of 2 vectors 192 */ 193 #ifndef dot 194 195 LC3_HOT static inline float neon_dot(const int16_t *a, const int16_t *b, int n) 196 { 197 int64x2_t v = vmovq_n_s64(0); 198 199 for (int i = 0; i < (n >> 4); i++) { 200 int32x4_t u; 201 202 u = vmull_s16( vld1_s16(a), vld1_s16(b)), a += 4, b += 4; 203 u = vmlal_s16(u, vld1_s16(a), vld1_s16(b)), a += 4, b += 4; 204 v = vpadalq_s32(v, u); 205 206 u = vmull_s16( vld1_s16(a), vld1_s16(b)), a += 4, b += 4; 207 u = vmlal_s16(u, vld1_s16(a), vld1_s16(b)), a += 4, b += 4; 208 v = vpadalq_s32(v, u); 209 } 210 211 int32_t v32 = (vaddvq_s64(v) + (1 << 5)) >> 6; 212 return (float)v32; 213 } 214 215 #ifndef TEST_NEON 216 #define dot neon_dot 217 #endif 218 219 #endif /* dot */ 220 221 /** 222 * Return vector of correlations 223 */ 224 #ifndef correlate 225 226 LC3_HOT static void neon_correlate( 227 const int16_t *a, const int16_t *b, int n, float *y, int nc) 228 { 229 for ( ; nc >= 4; nc -= 4, b -= 4) { 230 const int16_t *an = (const int16_t *)a; 231 const int16_t *bn = (const int16_t *)b; 232 233 int64x2_t v0 = vmovq_n_s64(0), v1 = v0, v2 = v0, v3 = v0; 234 int16x4_t ax, b0, b1; 235 236 b0 = vld1_s16(bn-4); 237 238 for (int i=0; i < (n >> 4); i++ ) 239 for (int j = 0; j < 2; j++) { 240 int32x4_t u0, u1, u2, u3; 241 242 b1 = b0; 243 b0 = vld1_s16(bn), bn += 4; 244 ax = vld1_s16(an), an += 4; 245 246 u0 = vmull_s16(ax, b0); 247 u1 = vmull_s16(ax, vext_s16(b1, b0, 3)); 248 u2 = vmull_s16(ax, vext_s16(b1, b0, 2)); 249 u3 = vmull_s16(ax, vext_s16(b1, b0, 1)); 250 251 b1 = b0; 252 b0 = vld1_s16(bn), bn += 4; 253 ax = vld1_s16(an), an += 4; 254 255 u0 = vmlal_s16(u0, ax, b0); 256 u1 = vmlal_s16(u1, ax, vext_s16(b1, b0, 3)); 257 u2 = vmlal_s16(u2, ax, vext_s16(b1, b0, 2)); 258 u3 = vmlal_s16(u3, ax, vext_s16(b1, b0, 1)); 259 260 v0 = vpadalq_s32(v0, u0); 261 v1 = vpadalq_s32(v1, u1); 262 v2 = vpadalq_s32(v2, u2); 263 v3 = vpadalq_s32(v3, u3); 264 } 265 266 *(y++) = (float)((int32_t)((vaddvq_s64(v0) + (1 << 5)) >> 6)); 267 *(y++) = (float)((int32_t)((vaddvq_s64(v1) + (1 << 5)) >> 6)); 268 *(y++) = (float)((int32_t)((vaddvq_s64(v2) + (1 << 5)) >> 6)); 269 *(y++) = (float)((int32_t)((vaddvq_s64(v3) + (1 << 5)) >> 6)); 270 } 271 272 for ( ; nc > 0; nc--) 273 *(y++) = neon_dot(a, b--, n); 274 } 275 #endif /* correlate */ 276 277 #ifndef TEST_NEON 278 #define correlate neon_correlate 279 #endif 280 281 #endif /* __ARM_NEON && __ARM_ARCH_ISA_A64 */ 282