| @// |
| @// Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. |
| @// |
| @// Use of this source code is governed by a BSD-style license |
| @// that can be found in the LICENSE file in the root of the source |
| @// tree. An additional intellectual property rights grant can be found |
| @// in the file PATENTS. All contributing project authors may |
| @// be found in the AUTHORS file in the root of the source tree. |
| @// |
| @// This file was originally licensed as follows. It has been |
| @// relicensed with permission from the copyright holders. |
| @// |
| |
| @// |
| @// File Name: omxSP_FFTInv_CCSToR_S32S16_Sfs_s.s |
| @// OpenMAX DL: v1.0.2 |
| @// Last Modified Revision: 7098 |
| @// Last Modified Date: Thu, 16 Aug 2007 |
| @// |
| @// (c) Copyright 2007-2008 ARM Limited. All Rights Reserved. |
| @// |
| @// |
| @// |
| @// Description: |
| @// Compute an inverse FFT for a complex signal |
| @// |
| |
| |
| |
| @// Include standard headers |
| |
| #include "dl/api/arm/armCOMM_s.h" |
| #include "dl/api/arm/omxtypes_s.h" |
| |
| |
| @// Import symbols required from other files |
| @// (For example tables) |
| |
| .extern omxSP_FFTInv_CCSToR_S32_Sfs |
| |
| |
| @// Set debugging level |
| @//DEBUG_ON SETL {TRUE} |
| |
| |
| |
| @// Guarding implementation by the processor name |
| |
| |
| |
| @// Guarding implementation by the processor name |
| |
| |
| @// Import symbols required from other files |
| @// (For example tables) |
| |
| |
| @//Input Registers |
| |
| #define pSrc r0 |
| #define pDst r1 |
| #define pFFTSpec r2 |
| #define scale r3 |
| |
| |
| @// Output registers |
| #define result r0 |
| |
| |
| #define N r6 |
| #define pOut r5 |
| #define pTmpDst r4 |
| |
| |
| @// Neon registers |
| |
| #define dX0 D0.S32 |
| #define dX01 D1.S32 |
| #define qX0 Q0.S32 |
| #define dY0 D2.S16 |
| #define dY0S32 D2.S32 |
| |
| |
| |
| @// Allocate stack memory required by the function |
| |
| @// Write function header |
| M_START omxSP_FFTInv_CCSToR_S32S16_Sfs,r11,d15 |
| |
| .set ARMsFFTSpec_N, 0 |
| .set ARMsFFTSpec_pBitRev, 4 |
| .set ARMsFFTSpec_pTwiddle, 8 |
| .set ARMsFFTSpec_pBuf, 12 |
| |
| @// Define stack arguments |
| |
| @// Read the size from structure and take log |
| LDR N, [pFFTSpec, #ARMsFFTSpec_N] |
| |
| @// Read other structure parameters |
| @//LDR pTwiddle, [pFFTSpec, #ARMsFFTSpec_pTwiddle] |
| LDR pOut, [pFFTSpec, #ARMsFFTSpec_pBuf] |
| |
| |
| MOV pTmpDst,pDst |
| ADD pDst,pOut,N, LSL #2 |
| |
| |
| BL omxSP_FFTInv_CCSToR_S32_Sfs |
| |
| ADD pDst,pOut,N, LSL #2 |
| |
| CMP N,#2 |
| BGT copyLoop |
| BEQ copyS32ToS16 |
| VLD1 dX0[0],[pDst] |
| VQMOVN dY0,qX0 |
| VST1 dY0[0],[pTmpDst] |
| |
| B End |
| |
| copyS32ToS16: |
| |
| VLD1 dX0,[pDst] |
| VQMOVN dY0,qX0 |
| VST1 dY0S32[0],[pTmpDst] |
| B End |
| |
| copyLoop: |
| |
| VLD1 {dX0,dX01},[pDst]! |
| SUBS N,N,#4 |
| VQMOVN dY0,qX0 |
| VST1 dY0,[pTmpDst]! |
| |
| BGT copyLoop |
| |
| |
| End: |
| @// Set return value |
| MOV result, #OMX_Sts_NoErr |
| |
| @// Write function tail |
| M_END |
| |
| .end |