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diff --git a/Drivers/CMSIS/DSP/Source/DistanceFunctions/arm_cityblock_distance_f16.c b/Drivers/CMSIS/DSP/Source/DistanceFunctions/arm_cityblock_distance_f16.c
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+++ b/Drivers/CMSIS/DSP/Source/DistanceFunctions/arm_cityblock_distance_f16.c
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+
+/* ----------------------------------------------------------------------
+ * Project:      CMSIS DSP Library
+ * Title:        arm_cityblock_distance_f16.c
+ * Description:  Cityblock (Manhattan) distance between two vectors
+ *
+ * $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/distance_functions_f16.h"
+
+#if defined(ARM_FLOAT16_SUPPORTED)
+
+#include <limits.h>
+#include <math.h>
+
+/**
+  @ingroup FloatDist
+ */
+
+/**
+  @defgroup Manhattan Cityblock (Manhattan) distance
+
+  Cityblock (Manhattan) distance
+ */
+
+/**
+  @addtogroup Manhattan
+  @{
+ */
+
+
+/**
+ * @brief        Cityblock (Manhattan) distance between two vectors
+ * @param[in]    pA         First vector
+ * @param[in]    pB         Second vector
+ * @param[in]    blockSize  vector length
+ * @return distance
+ *
+ */
+#if defined(ARM_MATH_MVE_FLOAT16) && !defined(ARM_MATH_AUTOVECTORIZE)
+
+#include "arm_helium_utils.h"
+#include "arm_vec_math.h"
+
+float16_t arm_cityblock_distance_f16(const float16_t *pA,const float16_t *pB, uint32_t blockSize)
+{
+    uint32_t        blkCnt;
+    f16x8_t         a, b, accumV, tempV;
+
+    accumV = vdupq_n_f16(0.0f);
+
+    blkCnt = blockSize >> 3;
+    while (blkCnt > 0U) {
+        a = vld1q(pA);
+        b = vld1q(pB);
+
+        tempV = vabdq(a, b);
+        accumV = vaddq(accumV, tempV);
+
+        pA += 8;
+        pB += 8;
+        blkCnt--;
+    }
+
+    /*
+     * tail
+     * (will be merged thru tail predication)
+     */
+    blkCnt = blockSize & 7;
+    if (blkCnt > 0U) {
+        mve_pred16_t    p0 = vctp16q(blkCnt);
+
+        a = vldrhq_z_f16(pA, p0);
+        b = vldrhq_z_f16(pB, p0);
+
+        tempV = vabdq(a, b);
+        accumV = vaddq_m(accumV, accumV, tempV, p0);
+    }
+
+    return vecAddAcrossF16Mve(accumV);
+}
+
+#else
+float16_t arm_cityblock_distance_f16(const float16_t *pA,const float16_t *pB, uint32_t blockSize)
+{
+   _Float16 accum,tmpA, tmpB;
+
+   accum = 0.0f16;
+   while(blockSize > 0)
+   {
+      tmpA = *pA++;
+      tmpB = *pB++;
+      accum  += (_Float16)fabsf((float32_t)((_Float16)tmpA - (_Float16)tmpB));
+      
+      blockSize --;
+   }
+  
+   return(accum);
+}
+#endif
+
+/**
+ * @} end of Manhattan group
+ */
+
+#endif /* #if defined(ARM_FLOAT16_SUPPORTED) */ 
+