| /*! \file conv_acc_neon.c |
| * Accelerated Viterbi decoder implementation |
| * for architectures with only NEON available. */ |
| /* |
| * (C) 2020 by sysmocom - s.f.m.c. GmbH |
| * Author: Eric Wild |
| * |
| * All Rights Reserved |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <stdlib.h> |
| #include <stdint.h> |
| #include <malloc.h> |
| #include "config.h" |
| |
| #if defined(HAVE_NEON) |
| #include <arm_neon.h> |
| #endif |
| |
| /* align req is 16 on android because google was confused, 8 on sane platforms */ |
| #define NEON_ALIGN 8 |
| |
| #include <conv_acc_neon_impl.h> |
| |
| /* Aligned Memory Allocator |
| * NEON requires 8-byte memory alignment. We store relevant trellis values |
| * (accumulated sums, outputs, and path decisions) as 16 bit signed integers |
| * so the allocated memory is casted as such. |
| */ |
| __attribute__ ((visibility("hidden"))) |
| int16_t *osmo_conv_neon_vdec_malloc(size_t n) |
| { |
| return (int16_t *) memalign(NEON_ALIGN, sizeof(int16_t) * n); |
| } |
| |
| __attribute__ ((visibility("hidden"))) |
| void osmo_conv_neon_vdec_free(int16_t *ptr) |
| { |
| free(ptr); |
| } |
| |
| __attribute__ ((visibility("hidden"))) |
| void osmo_conv_neon_metrics_k5_n2(const int8_t *val, const int16_t *out, |
| int16_t *sums, int16_t *paths, int norm) |
| { |
| const int16_t _val[4] = { val[0], val[1], val[0], val[1] }; |
| |
| _neon_metrics_k5_n2(_val, out, sums, paths, norm); |
| } |
| |
| __attribute__ ((visibility("hidden"))) |
| void osmo_conv_neon_metrics_k5_n3(const int8_t *val, const int16_t *out, |
| int16_t *sums, int16_t *paths, int norm) |
| { |
| const int16_t _val[4] = { val[0], val[1], val[2], 0 }; |
| |
| _neon_metrics_k5_n4(_val, out, sums, paths, norm); |
| } |
| |
| __attribute__ ((visibility("hidden"))) |
| void osmo_conv_neon_metrics_k5_n4(const int8_t *val, const int16_t *out, |
| int16_t *sums, int16_t *paths, int norm) |
| { |
| const int16_t _val[4] = { val[0], val[1], val[2], val[3] }; |
| |
| _neon_metrics_k5_n4(_val, out, sums, paths, norm); |
| } |
| |
| __attribute__ ((visibility("hidden"))) |
| void osmo_conv_neon_metrics_k7_n2(const int8_t *val, const int16_t *out, |
| int16_t *sums, int16_t *paths, int norm) |
| { |
| const int16_t _val[4] = { val[0], val[1], val[0], val[1] }; |
| |
| _neon_metrics_k7_n2(_val, out, sums, paths, norm); |
| } |
| |
| __attribute__ ((visibility("hidden"))) |
| void osmo_conv_neon_metrics_k7_n3(const int8_t *val, const int16_t *out, |
| int16_t *sums, int16_t *paths, int norm) |
| { |
| const int16_t _val[4] = { val[0], val[1], val[2], 0 }; |
| |
| _neon_metrics_k7_n4(_val, out, sums, paths, norm); |
| } |
| |
| __attribute__ ((visibility("hidden"))) |
| void osmo_conv_neon_metrics_k7_n4(const int8_t *val, const int16_t *out, |
| int16_t *sums, int16_t *paths, int norm) |
| { |
| const int16_t _val[4] = { val[0], val[1], val[2], val[3] }; |
| |
| _neon_metrics_k7_n4(_val, out, sums, paths, norm); |
| } |