/github/workspace/src/FastMathFunctions/plp_cos_q16.c
Functions
Name | |
---|---|
int16_t | plp_cos_q16(int16_t x) Glue code for q16 cosine function. |
Functions Documentation
function plp_cos_q16
int16_t plp_cos_q16(
int16_t x
)
Glue code for q16 cosine function.
Parameters:
- x Scaled input value: Q1.15 value in range [0, +0.9999] and is mapped to [0, 2*PI)
Return: cos(x)
Source code
/* =====================================================================
* Project: PULP DSP Library
* Title: plp_cos_q16.c
* Description: Calculates cosine of a q16 scaled input
*
* $Date: 30.07.2020
*
* Target Processor: PULP cores
* ===================================================================== */
/*
* Copyright (C) 2020 ETH Zurich and University of Bologna.
*
* Author: Michael Rogenmoser, ETH Zurich
*
* SPDX-License-Identifier: Apache-2.0
*
* 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
*
* 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.
*
* Notice: project inspired by ARM CMSIS DSP and parts of source code
* ported and adopted for RISC-V PULP platform from ARM CMSIS DSP
* released under Copyright (C) 2010-2019 ARM Limited or its affiliates
* with Apache-2.0.
*/
#include "plp_math.h"
int16_t plp_cos_q16(int16_t x) {
if (hal_cluster_id() == ARCHI_FC_CID) {
return plp_cos_q16s_rv32im(x);
} else {
return plp_cos_q16s_xpulpv2(x);
}
}
Updated on 2023-03-01 at 16:16:32 +0000