diff options
Diffstat (limited to 'media/openmax_dl/dl/sp/src/armSP_FFT_CToC_FC32_Radix2_fs_unsafe_s.S')
-rw-r--r-- | media/openmax_dl/dl/sp/src/armSP_FFT_CToC_FC32_Radix2_fs_unsafe_s.S | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/media/openmax_dl/dl/sp/src/armSP_FFT_CToC_FC32_Radix2_fs_unsafe_s.S b/media/openmax_dl/dl/sp/src/armSP_FFT_CToC_FC32_Radix2_fs_unsafe_s.S new file mode 100644 index 000000000..323eb8319 --- /dev/null +++ b/media/openmax_dl/dl/sp/src/armSP_FFT_CToC_FC32_Radix2_fs_unsafe_s.S @@ -0,0 +1,134 @@ +@// +@// 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 is a modification of armSP_FFT_CToC_SC32_Radix2_fs_unsafe_s.S +@// to support float instead of SC32. +@// + +@// +@// Description: +@// Compute the first stage of a Radix 2 DIT in-order out-of-place 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 pointStep r3 +#define outPointStep r3 +#define grpSize r4 +#define setCount r4 +#define step r8 +#define dstStep r8 + +@// Neon Registers + +#define dX0 D0.F32 +#define dX1 D1.F32 +#define dY0 D2.F32 +#define dY1 D3.F32 + + + .MACRO FFTSTAGE scaled, inverse, name + + @// Define stack arguments + + + @// update subFFTSize and subFFTNum into RN6 and RN7 for the next stage + + + MOV subFFTSize,#2 + LSR grpSize,subFFTNum,#1 + MOV subFFTNum,grpSize + + + @// pT0+1 increments pT0 by 8 bytes + @// pT0+pointStep = increment of 8*pointStep bytes = 4*grpSize bytes + @// Note: outPointStep = pointStep for firststage + @// Note: setCount = grpSize/2 (reuse the updated grpSize for setCount) + + MOV pointStep,grpSize,LSL #3 + RSB step,pointStep,#8 + + + @// Loop on the sets for grp zero + +grpZeroSetLoop\name : + + VLD1 dX0,[pSrc],pointStep + VLD1 dX1,[pSrc],step @// step = -pointStep + 8 + SUBS setCount,setCount,#1 + + VADD dY0,dX0,dX1 + VSUB dY1,dX0,dX1 + + VST1 dY0,[pDst],outPointStep + @// dstStep = step = -pointStep + 8 + VST1 dY1,[pDst],dstStep + + BGT grpZeroSetLoop\name + + + @// reset pSrc to pDst for the next stage + SUB pSrc,pDst,pointStep @// pDst -= 2*grpSize + MOV pDst,pPingPongBuf + + .endm + + + + M_START armSP_FFTFwd_CToC_FC32_Radix2_fs_OutOfPlace_unsafe,r4 + FFTSTAGE "FALSE","FALSE",fwd + M_END + + + + M_START armSP_FFTInv_CToC_FC32_Radix2_fs_OutOfPlace_unsafe,r4 + FFTSTAGE "FALSE","TRUE",inv + M_END + + .end |