Index: third_party/openmax_dl/dl/sp/src/armSP_FFT_CToC_FC32_Radix2_fs_unsafe_s.S |
diff --git a/third_party/openmax_dl/dl/sp/src/armSP_FFT_CToC_FC32_Radix2_fs_unsafe_s.S b/third_party/openmax_dl/dl/sp/src/armSP_FFT_CToC_FC32_Radix2_fs_unsafe_s.S |
new file mode 100644 |
index 0000000000000000000000000000000000000000..323eb8319dacacaebeea91f785eca602fc6d59c3 |
--- /dev/null |
+++ b/third_party/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 |