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diff --git a/Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_sub_q7.c b/Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_sub_q7.c
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+/* ----------------------------------------------------------------------
+ * Project:      CMSIS DSP Library
+ * Title:        arm_sub_q7.c
+ * Description:  Q7 vector subtraction
+ *
+ * $Date:        23 April 2021
+ * $Revision:    V1.9.0
+ *
+ * Target Processor: Cortex-M and Cortex-A cores
+ * -------------------------------------------------------------------- */
+/*
+ * Copyright (C) 2010-2021 ARM Limited or its affiliates. All rights reserved.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the License); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an AS IS BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "dsp/basic_math_functions.h"
+
+/**
+  @ingroup groupMath
+ */
+
+/**
+  @addtogroup BasicSub
+  @{
+ */
+
+/**
+  @brief         Q7 vector subtraction.
+  @param[in]     pSrcA      points to the first input vector
+  @param[in]     pSrcB      points to the second input vector
+  @param[out]    pDst       points to the output vector
+  @param[in]     blockSize  number of samples in each vector
+  @return        none
+
+  @par           Scaling and Overflow Behavior
+                   The function uses saturating arithmetic.
+                   Results outside of the allowable Q7 range [0x80 0x7F] will be saturated.
+ */
+#if defined(ARM_MATH_MVEI) && !defined(ARM_MATH_AUTOVECTORIZE)
+
+#include "arm_helium_utils.h"
+
+void arm_sub_q7(
+    const q7_t * pSrcA,
+    const q7_t * pSrcB,
+    q7_t * pDst,
+    uint32_t blockSize)
+{
+    uint32_t  blkCnt;           /* loop counters */
+    q7x16_t vecA;
+    q7x16_t vecB;
+
+    /* Compute 16 outputs at a time */
+    blkCnt = blockSize >> 4;
+    while (blkCnt > 0U)
+    {
+        /*
+         * C = A - B
+         * Subtract and then store the results in the destination buffer.
+         */
+        vecA = vld1q(pSrcA);
+        vecB = vld1q(pSrcB);
+        vst1q(pDst, vqsubq(vecA, vecB));
+        /*
+         * Decrement the blockSize loop counter
+         */
+        blkCnt--;
+        /*
+         * advance vector source and destination pointers
+         */
+        pSrcA  += 16;
+        pSrcB  += 16;
+        pDst   += 16;
+    }
+    /*
+     * tail
+     */
+    blkCnt = blockSize & 0xF;
+    if (blkCnt > 0U)
+    {
+        mve_pred16_t p0 = vctp8q(blkCnt);
+        vecA = vld1q(pSrcA);
+        vecB = vld1q(pSrcB);
+        vstrbq_p(pDst, vqsubq(vecA, vecB), p0);
+    }
+}
+#else
+void arm_sub_q7(
+  const q7_t * pSrcA,
+  const q7_t * pSrcB,
+        q7_t * pDst,
+        uint32_t blockSize)
+{
+        uint32_t blkCnt;                               /* Loop counter */
+
+#if defined (ARM_MATH_LOOPUNROLL)
+
+  /* Loop unrolling: Compute 4 outputs at a time */
+  blkCnt = blockSize >> 2U;
+
+  while (blkCnt > 0U)
+  {
+    /* C = A - B */
+
+#if defined (ARM_MATH_DSP)
+    /* Subtract and store result in destination buffer (4 samples at a time). */
+    write_q7x4_ia (&pDst, __QSUB8(read_q7x4_ia (&pSrcA), read_q7x4_ia (&pSrcB)));
+#else
+    *pDst++ = (q7_t) __SSAT((q15_t) *pSrcA++ - *pSrcB++, 8);
+    *pDst++ = (q7_t) __SSAT((q15_t) *pSrcA++ - *pSrcB++, 8);
+    *pDst++ = (q7_t) __SSAT((q15_t) *pSrcA++ - *pSrcB++, 8);
+    *pDst++ = (q7_t) __SSAT((q15_t) *pSrcA++ - *pSrcB++, 8);
+#endif
+
+    /* Decrement loop counter */
+    blkCnt--;
+  }
+
+  /* Loop unrolling: Compute remaining outputs */
+  blkCnt = blockSize % 0x4U;
+
+#else
+
+  /* Initialize blkCnt with number of samples */
+  blkCnt = blockSize;
+
+#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
+
+  while (blkCnt > 0U)
+  {
+    /* C = A - B */
+
+    /* Subtract and store result in destination buffer. */
+    *pDst++ = (q7_t) __SSAT((q15_t) *pSrcA++ - *pSrcB++, 8);
+
+    /* Decrement loop counter */
+    blkCnt--;
+  }
+
+}
+#endif /* defined(ARM_MATH_MVEI) */
+
+/**
+  @} end of BasicSub group
+ */