15b4baba28
- minimize RAM usage of all components - use both IRAM and DRAM in player component so we can buffer up to 1s on modules without SPI RAM - support fragemented pcm chunks so we can use all available RAM if there isn't a big enough block available but still enough HEAP - reinclude all components from jorgen's master branch - add custom i2s driver to get a precise timing of initial sync - change wrong usage of esp_timer for latency measurement of snapcast protocol - add player component
80 lines
1.8 KiB
ArmAsm
80 lines
1.8 KiB
ArmAsm
// Copyright 2018-2019 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "dsps_dotprod_platform.h"
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#if (dsps_dotprod_s16_ae32_enabled == 1)
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#include "dsps_dotprod_s16_m_ae32.S"
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#include "dsp_err_codes.h"
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.text
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.align 4
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.global dsps_dotprod_s16_ae32
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.type dsps_dotprod_s16_ae32,@function
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//esp_err_t dsps_dotprod_s16_ae32(const int16_t* src1, const int16_t* src2, int16_t* dest, int len, int8_t shift);
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dsps_dotprod_s16_ae32:
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// src1 - a2
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// src2 - a3
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// dest - a4
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// len - a5
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// shift - a6
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entry a1, 16
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// Check minimum length
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movi a8, 4
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blt a5, a8, dsps_dotprod_s16_ae32_error
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// Clear accumulator
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movi a8, 0
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wsr a8, acchi
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// Prepare and load round value
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movi a8, 0x7fff
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ssr a6
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srl a8, a8
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wsr a8, acclo // initialize acc with shifted round value
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// Compensate for pre-increment
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// Right shift to 16 bits
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// RS = -shift + 15
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neg a6, a6
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addi a6, a6, 15
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/* number of loop iterations (see below):
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* a7 = count / 4 - 1
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*/
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srli a7, a5, 2
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addi a7, a7, -1
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movi.n a10, 0 // load 0 to the a10 to increment second array
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dotprod_s16_ae32_full a2, a3, a7, a5
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/* Get accumulator */
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ssr a6
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rsr a2, acchi
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rsr a3, acclo
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src a2, a2, a3
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s16i a2, a4, 0
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movi.n a2, 0
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retw.n
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dsps_dotprod_s16_ae32_error:
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movi.n a2, ESP_ERR_DSP_INVALID_LENGTH
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retw.n
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#endif // dsps_dotprod_s16_ae32_enabled |