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Unified Diff: third_party/openmax_dl/dl/sp/src/armSP_FFT_CToC_SC16_Radix4_fs_unsafe_s.S

Issue 12317152: Add openmax dl routines for review. MUST NOT BE LANDED (Closed) Base URL: http://git.chromium.org/chromium/src.git@master
Patch Set: Created 7 years, 9 months ago
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Index: third_party/openmax_dl/dl/sp/src/armSP_FFT_CToC_SC16_Radix4_fs_unsafe_s.S
diff --git a/third_party/openmax_dl/dl/sp/src/armSP_FFT_CToC_SC16_Radix4_fs_unsafe_s.S b/third_party/openmax_dl/dl/sp/src/armSP_FFT_CToC_SC16_Radix4_fs_unsafe_s.S
new file mode 100644
index 0000000000000000000000000000000000000000..cdb42a994a1c26cf99e90d03a28c8c01e671648b
--- /dev/null
+++ b/third_party/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
aedla 2013/06/21 12:56:34 This seems to read 16 bytes OOB at the last iterat
+
+
+ .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
aedla 2013/06/21 12:56:34 Same here.
+
+
+ .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
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