From f2facaa0a2cc386810a798a61643e4b3545d7bbd Mon Sep 17 00:00:00 2001
From: Christophe Favergeon <Christophe.Favergeon@arm.com>
Date: Wed, 22 Jan 2020 13:29:53 +0100
Subject: [PATCH] CMSIS-DSP: Correction for issue 720

---
 Include/arm_math.h                             | 2 +-
 Source/TransformFunctions/arm_rfft_fast_f32.c  | 5 ++---
 Testing/Source/Tests/InterpolationTestsF32.cpp | 1 -
 Testing/Source/Tests/InterpolationTestsQ15.cpp | 1 -
 Testing/Source/Tests/InterpolationTestsQ31.cpp | 1 -
 Testing/Source/Tests/InterpolationTestsQ7.cpp  | 1 -
 6 files changed, 3 insertions(+), 8 deletions(-)

diff --git a/Include/arm_math.h b/Include/arm_math.h
index 5551f917..d111f81c 100644
--- a/Include/arm_math.h
+++ b/Include/arm_math.h
@@ -3363,7 +3363,7 @@ arm_status arm_rfft_4096_fast_init_f32 ( arm_rfft_fast_instance_f32 * S );
 
 
   void arm_rfft_fast_f32(
-        arm_rfft_fast_instance_f32 * S,
+        const arm_rfft_fast_instance_f32 * S,
         float32_t * p, float32_t * pOut,
         uint8_t ifftFlag);
 
diff --git a/Source/TransformFunctions/arm_rfft_fast_f32.c b/Source/TransformFunctions/arm_rfft_fast_f32.c
index ce51c195..8d5d72ec 100644
--- a/Source/TransformFunctions/arm_rfft_fast_f32.c
+++ b/Source/TransformFunctions/arm_rfft_fast_f32.c
@@ -573,13 +573,12 @@ void merge_rfft_f32(
 */
 
 void arm_rfft_fast_f32(
-  arm_rfft_fast_instance_f32 * S,
+  const arm_rfft_fast_instance_f32 * S,
   float32_t * p,
   float32_t * pOut,
   uint8_t ifftFlag)
 {
-   arm_cfft_instance_f32 * Sint = &(S->Sint);
-   Sint->fftLen = S->fftLenRFFT / 2;
+   const arm_cfft_instance_f32 * Sint = &(S->Sint);
 
    /* Calculation of Real FFT */
    if (ifftFlag)
diff --git a/Testing/Source/Tests/InterpolationTestsF32.cpp b/Testing/Source/Tests/InterpolationTestsF32.cpp
index 2f6a14df..010dee0b 100755
--- a/Testing/Source/Tests/InterpolationTestsF32.cpp
+++ b/Testing/Source/Tests/InterpolationTestsF32.cpp
@@ -39,7 +39,6 @@ a double precision computation.
        const float32_t *inp = input.ptr();
        float32_t *outp = output.ptr();
        float32_t x,y;
-       int i=0;
        int nb;
        for(nb = 0; nb < input.nbSamples(); nb += 2)
        {
diff --git a/Testing/Source/Tests/InterpolationTestsQ15.cpp b/Testing/Source/Tests/InterpolationTestsQ15.cpp
index 3df40fbf..dfa8d565 100755
--- a/Testing/Source/Tests/InterpolationTestsQ15.cpp
+++ b/Testing/Source/Tests/InterpolationTestsQ15.cpp
@@ -39,7 +39,6 @@ a double precision computation.
        const q31_t *inp = input.ptr();
        q15_t *outp = output.ptr();
        q31_t x,y;
-       int i=0;
        int nb;
        for(nb = 0; nb < input.nbSamples(); nb += 2)
        {
diff --git a/Testing/Source/Tests/InterpolationTestsQ31.cpp b/Testing/Source/Tests/InterpolationTestsQ31.cpp
index eb7f3628..e3d960b4 100755
--- a/Testing/Source/Tests/InterpolationTestsQ31.cpp
+++ b/Testing/Source/Tests/InterpolationTestsQ31.cpp
@@ -39,7 +39,6 @@ a double precision computation.
        const q31_t *inp = input.ptr();
        q31_t *outp = output.ptr();
        q31_t x,y;
-       int i=0;
        int nb;
        for(nb = 0; nb < input.nbSamples(); nb += 2)
        {
diff --git a/Testing/Source/Tests/InterpolationTestsQ7.cpp b/Testing/Source/Tests/InterpolationTestsQ7.cpp
index 6589d1f2..4acd93aa 100755
--- a/Testing/Source/Tests/InterpolationTestsQ7.cpp
+++ b/Testing/Source/Tests/InterpolationTestsQ7.cpp
@@ -38,7 +38,6 @@ a double precision computation.
        const q31_t *inp = input.ptr();
        q7_t *outp = output.ptr();
        q31_t x,y;
-       int i=0;
        int nb;
        for(nb = 0; nb < input.nbSamples(); nb += 2)
        {