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Diffstat (limited to 'media/openmax_dl/dl/sp/src/armSP_FFT_CToC_SC16_Radix4_fs_unsafe_s.S')
-rw-r--r-- | media/openmax_dl/dl/sp/src/armSP_FFT_CToC_SC16_Radix4_fs_unsafe_s.S | 314 |
1 files changed, 314 insertions, 0 deletions
diff --git a/media/openmax_dl/dl/sp/src/armSP_FFT_CToC_SC16_Radix4_fs_unsafe_s.S b/media/openmax_dl/dl/sp/src/armSP_FFT_CToC_SC16_Radix4_fs_unsafe_s.S new file mode 100644 index 000000000..ed0683fe7 --- /dev/null +++ b/media/openmax_dl/dl/sp/src/armSP_FFT_CToC_SC16_Radix4_fs_unsafe_s.S @@ -0,0 +1,314 @@ +@// +@// 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: armSP_FFT_CToC_SC16_Radix4_fs_unsafe_s.s +@// OpenMAX DL: v1.0.2 +@// Last Modified Revision: 7761 +@// Last Modified Date: Wed, 26 Sep 2007 +@// +@// (c) Copyright 2007-2008 ARM Limited. All Rights Reserved. +@// +@// +@// +@// Description: +@// Compute a first stage Radix 4 FFT stage for a N point complex signal +@// +@// + + +@// Include standard headers + +#include "dl/api/armCOMM_s.h" +#include "dl/api/omxtypes_s.h" + +@// Import symbols required from other files +@// (For example tables) + + + + +@// Set debugging level +@//DEBUG_ON SETL {TRUE} + + + +@// Guarding implementation by the processor name + + + +@// Guarding implementation by the processor name + + +@//Input Registers + +#define pSrc r0 +#define pDst r2 +#define pTwiddle r1 +#define pPingPongBuf r5 +#define subFFTNum r6 +#define subFFTSize r7 + + +@//Output Registers + + +@//Local Scratch Registers + +#define grpSize r3 +@// Reuse grpSize as setCount +#define setCount r3 +#define pointStep r4 +#define outPointStep r4 +#define setStep r8 +#define step1 r9 +#define step3 r10 + +@// Neon Registers + +#define dXr0 D0.S16 +#define dXi0 D1.S16 +#define dXr1 D2.S16 +#define dXi1 D3.S16 +#define dXr2 D4.S16 +#define dXi2 D5.S16 +#define dXr3 D6.S16 +#define dXi3 D7.S16 +#define dYr0 D8.S16 +#define dYi0 D9.S16 +#define dYr1 D10.S16 +#define dYi1 D11.S16 +#define dYr2 D12.S16 +#define dYi2 D13.S16 +#define dYr3 D14.S16 +#define dYi3 D15.S16 +#define dZr0 D16.S16 +#define dZi0 D17.S16 +#define dZr1 D18.S16 +#define dZi1 D19.S16 +#define dZr2 D20.S16 +#define dZi2 D21.S16 +#define dZr3 D22.S16 +#define dZi3 D23.S16 +#define qY0 Q4.S16 +#define qY2 Q6.S16 +#define qX0 Q0.S16 +#define qX2 Q2.S16 + +#define qY1 Q5.S16 +#define qY3 Q7.S16 +#define qX1 Q1.S16 +#define qX3 Q3.S16 +#define qZ0 Q8.S16 +#define qZ1 Q9.S16 + + + .MACRO FFTSTAGE scaled, inverse, name + + @// Define stack arguments + + MOV pointStep,subFFTNum + @// Update pSubFFTSize and pSubFFTNum regs + + + VLD2 {dXr0,dXi0},[pSrc, :128],pointStep @// data[0] + @// Note: setCount = subFFTNum/4 (reuse the grpSize reg for setCount) + LSR grpSize,subFFTNum,#2 + MOV subFFTNum,grpSize + + + @// pT0+1 increments pT0 by 4 bytes + @// pT0+pointStep = increment of 4*pointStep bytes = grpSize bytes + @// Note: outPointStep = pointStep for firststage + VLD2 {dXr1,dXi1},[pSrc, :128],pointStep @// data[1] + + + @// Calculate the step of input data for the next set + @//MOV setStep,pointStep,LSL #1 + MOV setStep,grpSize,LSL #3 + VLD2 {dXr2,dXi2},[pSrc, :128],pointStep @// data[2] + MOV step1,setStep + ADD setStep,setStep,pointStep @// setStep = 3*pointStep + RSB setStep,setStep,#16 @// setStep = - 3*pointStep+16 + + + VLD2 {dXr3,dXi3},[pSrc, :128],setStep @// data[3] + MOV subFFTSize,#4 @// subFFTSize = 1 for the first stage + + + .ifeqs "\scaled", "TRUE" + VHADD qY0,qX0,qX2 @// u0 + .ELSE + VADD qY0,qX0,qX2 @// u0 + .ENDIF + RSB step3,pointStep,#0 + + @// grp = 0 a special case since all the twiddle factors are 1 + @// Loop on the sets: 4 sets at a time + +grpZeroSetLoop\name: + + + .ifeqs "\scaled", "TRUE" + + @// finish first stage of 4 point FFT + + VHSUB qY2,qX0,qX2 @// u1 + SUBS setCount,setCount,#4 @// decrement the set loop counter + + VLD2 {dXr0,dXi0},[pSrc, :128],step1 @// data[0] + VHADD qY1,qX1,qX3 @// u2 + VLD2 {dXr2,dXi2},[pSrc, :128],step3 + VHSUB qY3,qX1,qX3 @// u3 + + + + @// finish second stage of 4 point FFT + + VLD2 {dXr1,dXi1},[pSrc, :128],step1 @// data[1] + VHADD qZ0,qY0,qY1 @// y0 + + VLD2 {dXr3,dXi3},[pSrc, :128],setStep + + + .ifeqs "\inverse", "TRUE" + + VHSUB dZr3,dYr2,dYi3 @// y3 + VHADD dZi3,dYi2,dYr3 + VST2 {dZr0,dZi0},[pDst, :128],outPointStep + + VHSUB qZ1,qY0,qY1 @// y2 + VST2 {dZr3,dZi3},[pDst, :128],outPointStep + + VHADD dZr2,dYr2,dYi3 @// y1 + VST2 {dZr1,dZi1},[pDst, :128],outPointStep + VHSUB dZi2,dYi2,dYr3 + + VHADD qY0,qX0,qX2 @// u0 (next loop) + VST2 {dZr2,dZi2},[pDst, :128],setStep + + + .ELSE + + VHADD dZr2,dYr2,dYi3 @// y1 + VHSUB dZi2,dYi2,dYr3 + + VST2 {dZr0,dZi0},[pDst, :128],outPointStep + VHSUB qZ1,qY0,qY1 @// y2 + + VST2 {dZr2,dZi2},[pDst, :128],outPointStep + VHSUB dZr3,dYr2,dYi3 @// y3 + VHADD dZi3,dYi2,dYr3 + VST2 {dZr1,dZi1},[pDst, :128],outPointStep + VHADD qY0,qX0,qX2 @// u0 (next loop) + VST2 {dZr3,dZi3},[pDst, :128],setStep + + .ENDIF + + + .ELSE + + @// finish first stage of 4 point FFT + + VSUB qY2,qX0,qX2 @// u1 + SUBS setCount,setCount,#4 @// decrement the set loop counter + + VLD2 {dXr0,dXi0},[pSrc, :128],step1 @// data[0] + VADD qY1,qX1,qX3 @// u2 + VLD2 {dXr2,dXi2},[pSrc, :128],step3 + VSUB qY3,qX1,qX3 @// u3 + + + + @// finish second stage of 4 point FFT + + VLD2 {dXr1,dXi1},[pSrc, :128],step1 @// data[1] + VADD qZ0,qY0,qY1 @// y0 + + VLD2 {dXr3,dXi3},[pSrc, :128],setStep + + + .ifeqs "\inverse", "TRUE" + + VSUB dZr3,dYr2,dYi3 @// y3 + VADD dZi3,dYi2,dYr3 + VST2 {dZr0,dZi0},[pDst, :128],outPointStep + + VSUB qZ1,qY0,qY1 @// y2 + VST2 {dZr3,dZi3},[pDst, :128],outPointStep + + VADD dZr2,dYr2,dYi3 @// y1 + VST2 {dZr1,dZi1},[pDst, :128],outPointStep + VSUB dZi2,dYi2,dYr3 + + VADD qY0,qX0,qX2 @// u0 (next loop) + VST2 {dZr2,dZi2},[pDst, :128],setStep + + + .ELSE + + VADD dZr2,dYr2,dYi3 @// y1 + VSUB dZi2,dYi2,dYr3 + + VST2 {dZr0,dZi0},[pDst, :128],outPointStep + VSUB qZ1,qY0,qY1 @// y2 + + VST2 {dZr2,dZi2},[pDst, :128],outPointStep + VSUB dZr3,dYr2,dYi3 @// y3 + VADD dZi3,dYi2,dYr3 + VST2 {dZr1,dZi1},[pDst, :128],outPointStep + VADD qY0,qX0,qX2 @// u0 (next loop) + VST2 {dZr3,dZi3},[pDst, :128],setStep + + .ENDIF + + + .ENDIF + + BGT grpZeroSetLoop\name + + + @// reset pSrc to pDst for the next stage + SUB pSrc,pDst,pointStep @// pDst -= grpSize + MOV pDst,pPingPongBuf + + + .endm + + + + M_START armSP_FFTFwd_CToC_SC16_Radix4_fs_OutOfPlace_unsafe,r4 + FFTSTAGE "FALSE","FALSE",FWD + M_END + + + + M_START armSP_FFTInv_CToC_SC16_Radix4_fs_OutOfPlace_unsafe,r4 + FFTSTAGE "FALSE","TRUE",INV + M_END + + + M_START armSP_FFTFwd_CToC_SC16_Sfs_Radix4_fs_OutOfPlace_unsafe,r4 + FFTSTAGE "TRUE","FALSE",FWDSFS + M_END + + + M_START armSP_FFTInv_CToC_SC16_Sfs_Radix4_fs_OutOfPlace_unsafe,r4 + FFTSTAGE "TRUE","TRUE",INVSFS + M_END + + + + + + .END |