| /****************************************************************************** |
| * |
| * Copyright 2022 Google LLC |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at: |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| ******************************************************************************/ |
| |
| #if __ARM_NEON && __ARM_ARCH_ISA_A64 |
| |
| #ifndef TEST_NEON |
| #include <arm_neon.h> |
| #endif /* TEST_NEON */ |
| |
| |
| /** |
| * Import |
| */ |
| |
| static inline int32_t filter_hp50(struct lc3_ltpf_hp50_state *, int32_t); |
| |
| |
| /** |
| * Resample from 16 Khz to 12.8 KHz |
| */ |
| #ifndef resample_16k_12k8 |
| #define resample_16k_12k8 neon_resample_16k_12k8 |
| LC3_HOT static void neon_resample_16k_12k8( |
| struct lc3_ltpf_hp50_state *hp50, const int16_t *x, int16_t *y, int n) |
| { |
| static const int16_t h[4][20] = { |
| |
| { -61, 214, -398, 417, 0, -1052, 2686, -4529, 5997, 26233, |
| 5997, -4529, 2686, -1052, 0, 417, -398, 214, -61, 0 }, |
| |
| { -79, 180, -213, 0, 598, -1522, 2389, -2427, 0, 24506, |
| 13068, -5289, 1873, 0, -752, 763, -457, 156, 0, -28 }, |
| |
| { -61, 92, 0, -323, 861, -1361, 1317, 0, -3885, 19741, |
| 19741, -3885, 0, 1317, -1361, 861, -323, 0, 92, -61 }, |
| |
| { -28, 0, 156, -457, 763, -752, 0, 1873, -5289, 13068, |
| 24506, 0, -2427, 2389, -1522, 598, 0, -213, 180, -79 }, |
| |
| }; |
| |
| x -= 20 - 1; |
| |
| for (int i = 0; i < 5*n; i += 5) { |
| const int16_t *hn = h[i & 3]; |
| const int16_t *xn = x + (i >> 2); |
| int32x4_t un; |
| |
| un = vmull_s16( vld1_s16(xn), vld1_s16(hn)), xn += 4, hn += 4; |
| un = vmlal_s16(un, vld1_s16(xn), vld1_s16(hn)), xn += 4, hn += 4; |
| un = vmlal_s16(un, vld1_s16(xn), vld1_s16(hn)), xn += 4, hn += 4; |
| un = vmlal_s16(un, vld1_s16(xn), vld1_s16(hn)), xn += 4, hn += 4; |
| un = vmlal_s16(un, vld1_s16(xn), vld1_s16(hn)), xn += 4, hn += 4; |
| |
| int32_t yn = filter_hp50(hp50, vaddvq_s32(un)); |
| *(y++) = (yn + (1 << 15)) >> 16; |
| } |
| } |
| #endif /* resample_16k_12k8 */ |
| |
| /** |
| * Resample from 32 Khz to 12.8 KHz |
| */ |
| #ifndef resample_32k_12k8 |
| #define resample_32k_12k8 neon_resample_32k_12k8 |
| LC3_HOT static void neon_resample_32k_12k8( |
| struct lc3_ltpf_hp50_state *hp50, const int16_t *x, int16_t *y, int n) |
| { |
| x -= 40 - 1; |
| |
| static const int16_t h[2][40] = { |
| |
| { -30, -31, 46, 107, 0, -199, -162, 209, 430, 0, |
| -681, -526, 658, 1343, 0, -2264, -1943, 2999, 9871, 13116, |
| 9871, 2999, -1943, -2264, 0, 1343, 658, -526, -681, 0, |
| 430, 209, -162, -199, 0, 107, 46, -31, -30, 0 }, |
| |
| { -14, -39, 0, 90, 78, -106, -229, 0, 382, 299, |
| -376, -761, 0, 1194, 937, -1214, -2644, 0, 6534, 12253, |
| 12253, 6534, 0, -2644, -1214, 937, 1194, 0, -761, -376, |
| 299, 382, 0, -229, -106, 78, 90, 0, -39, -14 }, |
| |
| }; |
| |
| for (int i = 0; i < 5*n; i += 5) { |
| const int16_t *hn = h[i & 1]; |
| const int16_t *xn = x + (i >> 1); |
| |
| int32x4_t un = vmull_s16(vld1_s16(xn), vld1_s16(hn)); |
| xn += 4, hn += 4; |
| |
| for (int i = 1; i < 10; i++) |
| un = vmlal_s16(un, vld1_s16(xn), vld1_s16(hn)), xn += 4, hn += 4; |
| |
| int32_t yn = filter_hp50(hp50, vaddvq_s32(un)); |
| *(y++) = (yn + (1 << 15)) >> 16; |
| } |
| } |
| #endif /* resample_32k_12k8 */ |
| |
| /** |
| * Resample from 48 Khz to 12.8 KHz |
| */ |
| #ifndef resample_48k_12k8 |
| #define resample_48k_12k8 neon_resample_48k_12k8 |
| LC3_HOT static void neon_resample_48k_12k8( |
| struct lc3_ltpf_hp50_state *hp50, const int16_t *x, int16_t *y, int n) |
| { |
| static const int16_t alignas(16) h[4][64] = { |
| |
| { -13, -25, -20, 10, 51, 71, 38, -47, -133, -145, |
| -42, 139, 277, 242, 0, -329, -511, -351, 144, 698, |
| 895, 450, -535, -1510, -1697, -521, 1999, 5138, 7737, 8744, |
| 7737, 5138, 1999, -521, -1697, -1510, -535, 450, 895, 698, |
| 144, -351, -511, -329, 0, 242, 277, 139, -42, -145, |
| -133, -47, 38, 71, 51, 10, -20, -25, -13, 0 }, |
| |
| { -9, -23, -24, 0, 41, 71, 52, -23, -115, -152, |
| -78, 92, 254, 272, 76, -251, -493, -427, 0, 576, |
| 900, 624, -262, -1309, -1763, -954, 1272, 4356, 7203, 8679, |
| 8169, 5886, 2767, 0, -1542, -1660, -809, 240, 848, 796, |
| 292, -252, -507, -398, -82, 199, 288, 183, 0, -130, |
| -145, -71, 20, 69, 60, 20, -15, -26, -17, -3 }, |
| |
| { -6, -20, -26, -8, 31, 67, 62, 0, -94, -152, |
| -108, 45, 223, 287, 143, -167, -454, -480, -134, 439, |
| 866, 758, 0, -1071, -1748, -1295, 601, 3559, 6580, 8485, |
| 8485, 6580, 3559, 601, -1295, -1748, -1071, 0, 758, 866, |
| 439, -134, -480, -454, -167, 143, 287, 223, 45, -108, |
| -152, -94, 0, 62, 67, 31, -8, -26, -20, -6 }, |
| |
| { -3, -17, -26, -15, 20, 60, 69, 20, -71, -145, |
| -130, 0, 183, 288, 199, -82, -398, -507, -252, 292, |
| 796, 848, 240, -809, -1660, -1542, 0, 2767, 5886, 8169, |
| 8679, 7203, 4356, 1272, -954, -1763, -1309, -262, 624, 900, |
| 576, 0, -427, -493, -251, 76, 272, 254, 92, -78, |
| -152, -115, -23, 52, 71, 41, 0, -24, -23, -9 }, |
| |
| }; |
| |
| x -= 60 - 1; |
| |
| for (int i = 0; i < 15*n; i += 15) { |
| const int16_t *hn = h[i & 3]; |
| const int16_t *xn = x + (i >> 2); |
| |
| int32x4_t un = vmull_s16(vld1_s16(xn), vld1_s16(hn)); |
| xn += 4, hn += 4; |
| |
| for (int i = 1; i < 15; i++) |
| un = vmlal_s16(un, vld1_s16(xn), vld1_s16(hn)), xn += 4, hn += 4; |
| |
| int32_t yn = filter_hp50(hp50, vaddvq_s32(un)); |
| *(y++) = (yn + (1 << 15)) >> 16; |
| } |
| } |
| #endif /* resample_48k_12k8 */ |
| |
| /** |
| * Return dot product of 2 vectors |
| */ |
| #ifndef dot |
| #define dot neon_dot |
| LC3_HOT static inline float neon_dot(const int16_t *a, const int16_t *b, int n) |
| { |
| int64x2_t v = vmovq_n_s64(0); |
| |
| for (int i = 0; i < (n >> 4); i++) { |
| int32x4_t u; |
| |
| u = vmull_s16( vld1_s16(a), vld1_s16(b)), a += 4, b += 4; |
| u = vmlal_s16(u, vld1_s16(a), vld1_s16(b)), a += 4, b += 4; |
| v = vpadalq_s32(v, u); |
| |
| u = vmull_s16( vld1_s16(a), vld1_s16(b)), a += 4, b += 4; |
| u = vmlal_s16(u, vld1_s16(a), vld1_s16(b)), a += 4, b += 4; |
| v = vpadalq_s32(v, u); |
| } |
| |
| int32_t v32 = (vaddvq_s64(v) + (1 << 5)) >> 6; |
| return (float)v32; |
| } |
| #endif /* dot */ |
| |
| /** |
| * Return vector of correlations |
| */ |
| #ifndef correlate |
| #define correlate neon_correlate |
| LC3_HOT static void neon_correlate( |
| const int16_t *a, const int16_t *b, int n, float *y, int nc) |
| { |
| for ( ; nc >= 4; nc -= 4, b -= 4) { |
| const int16_t *an = (const int16_t *)a; |
| const int16_t *bn = (const int16_t *)b; |
| |
| int64x2_t v0 = vmovq_n_s64(0), v1 = v0, v2 = v0, v3 = v0; |
| int16x4_t ax, b0, b1; |
| |
| b0 = vld1_s16(bn-4); |
| |
| for (int i=0; i < (n >> 4); i++ ) |
| for (int j = 0; j < 2; j++) { |
| int32x4_t u0, u1, u2, u3; |
| |
| b1 = b0; |
| b0 = vld1_s16(bn), bn += 4; |
| ax = vld1_s16(an), an += 4; |
| |
| u0 = vmull_s16(ax, b0); |
| u1 = vmull_s16(ax, vext_s16(b1, b0, 3)); |
| u2 = vmull_s16(ax, vext_s16(b1, b0, 2)); |
| u3 = vmull_s16(ax, vext_s16(b1, b0, 1)); |
| |
| b1 = b0; |
| b0 = vld1_s16(bn), bn += 4; |
| ax = vld1_s16(an), an += 4; |
| |
| u0 = vmlal_s16(u0, ax, b0); |
| u1 = vmlal_s16(u1, ax, vext_s16(b1, b0, 3)); |
| u2 = vmlal_s16(u2, ax, vext_s16(b1, b0, 2)); |
| u3 = vmlal_s16(u3, ax, vext_s16(b1, b0, 1)); |
| |
| v0 = vpadalq_s32(v0, u0); |
| v1 = vpadalq_s32(v1, u1); |
| v2 = vpadalq_s32(v2, u2); |
| v3 = vpadalq_s32(v3, u3); |
| } |
| |
| *(y++) = (float)((int32_t)((vaddvq_s64(v0) + (1 << 5)) >> 6)); |
| *(y++) = (float)((int32_t)((vaddvq_s64(v1) + (1 << 5)) >> 6)); |
| *(y++) = (float)((int32_t)((vaddvq_s64(v2) + (1 << 5)) >> 6)); |
| *(y++) = (float)((int32_t)((vaddvq_s64(v3) + (1 << 5)) >> 6)); |
| } |
| |
| for ( ; nc > 0; nc--) |
| *(y++) = neon_dot(a, b--, n); |
| } |
| #endif /* correlate */ |
| |
| #endif /* __ARM_NEON && __ARM_ARCH_ISA_A64 */ |
