/github/workspace/src/TransformFunctions/plp_cfft_q32.c
Functions
Name | |
---|---|
void | plp_cfft_q32(const plp_cfft_instance_q32 * S, int32_t * p1, uint8_t ifftFlag, uint8_t bitReverseFlag, uint32_t fracBits) Glue code for quantized 32-bit complex fast fourier transform. |
Functions Documentation
function plp_cfft_q32
void plp_cfft_q32(
const plp_cfft_instance_q32 * S,
int32_t * p1,
uint8_t ifftFlag,
uint8_t bitReverseFlag,
uint32_t fracBits
)
Glue code for quantized 32-bit complex fast fourier transform.
Parameters:
- S points to an instance of the 32bit quantized CFFT structure
- p1 points to the complex data buffer of size
2*fftLen
. Processing occurs in-place. - ifftFlag flag that selects forwart (ifftFlag=0) or inverse (ifftFlag=1)
- bitReverseFlag flag that enables (bitReverseFlag=1) of disables (bitReverseFlag=0) bit reversal of output.
- fracBits decimal point for right shift (input format Q(32-fracBits).fracBits)
Source code
/* =====================================================================
* Project: PULP DSP Library
* Title: plp_cfft_q32.c
* Description: 32-bit fixed point Fast Fourier Transform on Complex Input Data
*
* $Date: 30. July 2020
* $Revision: V0
*
* Target Processor: PULP cores
* ===================================================================== */
/*
* Copyright (C) 2020 ETH Zurich and University of Bologna. All rights reserved.
*
* 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.
*/
#include "plp_math.h"
void plp_cfft_q32(const plp_cfft_instance_q32 *S,
int32_t *p1,
uint8_t ifftFlag,
uint8_t bitReverseFlag,
uint32_t fracBits){
// if (fracBits != 31) {
// printf("Only Q1.31 fixed point supported currently.\n");
// return;
// }
if (hal_cluster_id() == ARCHI_FC_CID) {
plp_cfft_q32s_rv32im(S, p1, ifftFlag, bitReverseFlag, fracBits);
} else {
plp_cfft_q32s_xpulpv2(S, p1, ifftFlag, bitReverseFlag, fracBits);
}
}
Updated on 2023-03-01 at 16:16:33 +0000