diff --git a/src/core/NEON/kernels/arm_gemm/indirect-interleaves/a64_interleave8_block4_s8_s8_summing.hpp b/src/core/NEON/kernels/arm_gemm/indirect-interleaves/a64_interleave8_block4_s8_s8_summing.hpp
new file mode 100644
index 0000000..2831cb7
--- /dev/null
+++ b/src/core/NEON/kernels/arm_gemm/indirect-interleaves/a64_interleave8_block4_s8_s8_summing.hpp
@@ -0,0 +1,370 @@
+/*
+ * Copyright (c) 2019-2020 Arm Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#ifdef __aarch64__
+
+template<>
+void interleave_block<8, 4, VLType::None, true>(
+  int8_t * &out_ptr, const int8_t * const * in, size_t width, size_t height,
+  size_t row_offset, bool first
+)
+{
+  __asm__ __volatile__(
+      "movi v1.8h, #0x0\n"
+      "ldr x27, [%x[in], #0x0]\n"
+      "mov x19, #0x0\n"
+      "movi v0.8h, #0x0\n"
+      "ldr x26, [%x[in], #0x8]\n"
+      "cmp %x[height], #0x8\n"
+      "movi v31.4s, #0x0\n"
+      "ldr x25, [%x[in], #0x10]\n"
+      "add x27, x27, %x[row_offset]\n"
+      "movi v30.4s, #0x0\n"
+      "ldr x24, [%x[in], #0x18]\n"
+      "ldr x23, [%x[in], #0x20]\n"
+      "add x26, x26, %x[row_offset]\n"
+      "ldr x22, [%x[in], #0x28]\n"
+      "add x25, x25, %x[row_offset]\n"
+      "ldr x21, [%x[in], #0x30]\n"
+      "add x24, x24, %x[row_offset]\n"
+      "ldr x20, [%x[in], #0x38]\n"
+      "add x23, x23, %x[row_offset]\n"
+      "add x22, x22, %x[row_offset]\n"
+      "add x21, x21, %x[row_offset]\n"
+      "add x20, x20, %x[row_offset]\n"
+      "beq 1f\n"
+      "mov x20, x27\n"
+      "cmp %x[height], #0x2\n"
+      "csel x26, x26, x27, GE\n"
+      "csel x25, x25, x27, GT\n"
+      "cmp %x[height], #0x4\n"
+      "csel x24, x24, x27, GE\n"
+      "csel x23, x23, x27, GT\n"
+      "cmp %x[height], #0x6\n"
+      "csel x22, x22, x27, GE\n"
+      "csel x21, x21, x27, GT\n"
+      "1:"  // no_pointer_adj
+      "prfm pldl1keep, [x27, #0x0]\n"
+      "prfm pldl1keep, [x26, #0x0]\n"
+      "prfm pldl1keep, [x25, #0x0]\n"
+      "prfm pldl1keep, [x24, #0x0]\n"
+      "prfm pldl1keep, [x23, #0x0]\n"
+      "prfm pldl1keep, [x22, #0x0]\n"
+      "prfm pldl1keep, [x21, #0x0]\n"
+      "prfm pldl1keep, [x20, #0x0]\n"
+      "prfm pldl1keep, [x27, #0x40]\n"
+      "prfm pldl1keep, [x26, #0x40]\n"
+      "prfm pldl1keep, [x25, #0x40]\n"
+      "prfm pldl1keep, [x24, #0x40]\n"
+      "prfm pldl1keep, [x23, #0x40]\n"
+      "prfm pldl1keep, [x22, #0x40]\n"
+      "prfm pldl1keep, [x21, #0x40]\n"
+      "prfm pldl1keep, [x20, #0x40]\n"
+      "cbnz %w[first], 2f\n"
+      "sub %x[out_ptr], %x[out_ptr], #0x20\n"
+      "ld1 { v31.4s }, [%x[out_ptr]]\n"
+      "ldr q30, [%x[out_ptr], #0x10]\n"
+      "2:"  // first_pass
+      "cmp %x[width], #0x10\n"
+      "blt 5f\n"
+      "3:"  // Main loop head
+      "cmp x19, #0x1e\n"
+      "ble 4f\n"
+      "sadalp v31.4s, v1.8h\n"
+      "movi v1.8h, #0x0\n"
+      "sadalp v30.4s, v0.8h\n"
+      "movi v0.8h, #0x0\n"
+      "mov x19, #0x0\n"
+      "4:"  // no_accumulate_16
+      "ldr q29, [x27], #0x10\n"
+      "prfm pldl1keep, [x27, #0x70]\n"
+      "ldr q28, [x26], #0x10\n"
+      "ldr q27, [x25], #0x10\n"
+      "zip1 v23.4s, v29.4s, v27.4s\n"
+      "prfm pldl1keep, [x26, #0x70]\n"
+      "ldr q21, [x24], #0x10\n"
+      "zip2 v27.4s, v29.4s, v27.4s\n"
+      "prfm pldl1keep, [x25, #0x70]\n"
+      "ldr q26, [x23], #0x10\n"
+      "zip1 v20.4s, v28.4s, v21.4s\n"
+      "prfm pldl1keep, [x24, #0x70]\n"
+      "ldr q25, [x22], #0x10\n"
+      "zip1 v16.4s, v23.4s, v20.4s\n"
+      "prfm pldl1keep, [x23, #0x70]\n"
+      "ldr q19, [x21], #0x10\n"
+      "zip2 v24.4s, v23.4s, v20.4s\n"
+      "prfm pldl1keep, [x22, #0x70]\n"
+      "zip2 v23.4s, v28.4s, v21.4s\n"
+      "ldr q22, [x20], #0x10\n"
+      "zip1 v18.4s, v26.4s, v19.4s\n"
+      "prfm pldl1keep, [x21, #0x70]\n"
+      "str q16, [%x[out_ptr], #0x0]\n"
+      "zip1 v21.4s, v27.4s, v23.4s\n"
+      "prfm pldl1keep, [x20, #0x70]\n"
+      "zip1 v17.4s, v25.4s, v22.4s\n"
+      "sadalp v1.8h, v16.16b\n"
+      "zip1 v16.4s, v18.4s, v17.4s\n"
+      "add x19, x19, #0x1\n"
+      "zip2 v20.4s, v18.4s, v17.4s\n"
+      "str q16, [%x[out_ptr], #0x10]\n"
+      "zip2 v19.4s, v26.4s, v19.4s\n"
+      "sadalp v0.8h, v16.16b\n"
+      "zip2 v16.4s, v25.4s, v22.4s\n"
+      "str q24, [%x[out_ptr], #0x20]\n"
+      "zip1 v18.4s, v19.4s, v16.4s\n"
+      "sadalp v1.8h, v24.16b\n"
+      "zip2 v17.4s, v27.4s, v23.4s\n"
+      "str q20, [%x[out_ptr], #0x30]\n"
+      "zip2 v16.4s, v19.4s, v16.4s\n"
+      "str q21, [%x[out_ptr], #0x40]\n"
+      "str q18, [%x[out_ptr], #0x50]\n"
+      "sadalp v0.8h, v20.16b\n"
+      "str q17, [%x[out_ptr], #0x60]\n"
+      "sadalp v1.8h, v21.16b\n"
+      "str q16, [%x[out_ptr], #0x70]\n"
+      "subs %x[width], %x[width], #0x10\n"
+      "sadalp v0.8h, v18.16b\n"
+      "cmp %x[width], #0x10\n"
+      "sadalp v1.8h, v17.16b\n"
+      "add %x[out_ptr], %x[out_ptr], #0x80\n"
+      "sadalp v0.8h, v16.16b\n"
+      "bge 3b\n"
+      "5:"  // Main loop skip
+      "cbz %x[width], 14f\n"
+      "tbz %x[width], #3, 9f\n"
+      "ldr d29, [x27], #0x8\n"
+      "ldr d28, [x26], #0x8\n"
+      "ldr d27, [x25], #0x8\n"
+      "ldr d21, [x24], #0x8\n"
+      "ldr d26, [x23], #0x8\n"
+      "ldr d25, [x22], #0x8\n"
+      "ldr d19, [x21], #0x8\n"
+      "ldr d22, [x20], #0x8\n"
+      "tbz %x[width], #2, 7f\n"
+      "ld1 { v29.s }[2], [x27], #0x4\n"
+      "ld1 { v28.s }[2], [x26], #0x4\n"
+      "ld1 { v27.s }[2], [x25], #0x4\n"
+      "ld1 { v21.s }[2], [x24], #0x4\n"
+      "ld1 { v26.s }[2], [x23], #0x4\n"
+      "ld1 { v25.s }[2], [x22], #0x4\n"
+      "ld1 { v19.s }[2], [x21], #0x4\n"
+      "ld1 { v22.s }[2], [x20], #0x4\n"
+      "tbz %x[width], #1, 6f\n"
+      "ld1 { v29.h }[6], [x27], #0x2\n"
+      "ld1 { v28.h }[6], [x26], #0x2\n"
+      "ld1 { v27.h }[6], [x25], #0x2\n"
+      "ld1 { v21.h }[6], [x24], #0x2\n"
+      "ld1 { v26.h }[6], [x23], #0x2\n"
+      "ld1 { v25.h }[6], [x22], #0x2\n"
+      "ld1 { v19.h }[6], [x21], #0x2\n"
+      "ld1 { v22.h }[6], [x20], #0x2\n"
+      "mov x19, #0x4\n"
+      "tbz %x[width], #0, 13f\n"
+      "ld1 { v29.b }[14], [x27]\n"
+      "ld1 { v28.b }[14], [x26]\n"
+      "ld1 { v27.b }[14], [x25]\n"
+      "ld1 { v21.b }[14], [x24]\n"
+      "ld1 { v26.b }[14], [x23]\n"
+      "ld1 { v25.b }[14], [x22]\n"
+      "ld1 { v19.b }[14], [x21]\n"
+      "ld1 { v22.b }[14], [x20]\n"
+      "b 13f\n"
+      "6:"  // odd_loads_1_12
+      "mov x19, #0x3\n"
+      "tbz %x[width], #0, 13f\n"
+      "ld1 { v29.b }[12], [x27]\n"
+      "ld1 { v28.b }[12], [x26]\n"
+      "ld1 { v27.b }[12], [x25]\n"
+      "ld1 { v21.b }[12], [x24]\n"
+      "ld1 { v26.b }[12], [x23]\n"
+      "ld1 { v25.b }[12], [x22]\n"
+      "ld1 { v19.b }[12], [x21]\n"
+      "ld1 { v22.b }[12], [x20]\n"
+      "mov x19, #0x4\n"
+      "b 13f\n"
+      "7:"  // odd_loads_2_8
+      "tbz %x[width], #1, 8f\n"
+      "ld1 { v29.h }[4], [x27], #0x2\n"
+      "ld1 { v28.h }[4], [x26], #0x2\n"
+      "ld1 { v27.h }[4], [x25], #0x2\n"
+      "ld1 { v21.h }[4], [x24], #0x2\n"
+      "ld1 { v26.h }[4], [x23], #0x2\n"
+      "ld1 { v25.h }[4], [x22], #0x2\n"
+      "ld1 { v19.h }[4], [x21], #0x2\n"
+      "ld1 { v22.h }[4], [x20], #0x2\n"
+      "mov x19, #0x3\n"
+      "tbz %x[width], #0, 13f\n"
+      "ld1 { v29.b }[10], [x27]\n"
+      "ld1 { v28.b }[10], [x26]\n"
+      "ld1 { v27.b }[10], [x25]\n"
+      "ld1 { v21.b }[10], [x24]\n"
+      "ld1 { v26.b }[10], [x23]\n"
+      "ld1 { v25.b }[10], [x22]\n"
+      "ld1 { v19.b }[10], [x21]\n"
+      "ld1 { v22.b }[10], [x20]\n"
+      "b 13f\n"
+      "8:"  // odd_loads_1_8
+      "mov x19, #0x2\n"
+      "tbz %x[width], #0, 13f\n"
+      "ld1 { v29.b }[8], [x27]\n"
+      "ld1 { v28.b }[8], [x26]\n"
+      "ld1 { v27.b }[8], [x25]\n"
+      "ld1 { v21.b }[8], [x24]\n"
+      "ld1 { v26.b }[8], [x23]\n"
+      "ld1 { v25.b }[8], [x22]\n"
+      "ld1 { v19.b }[8], [x21]\n"
+      "ld1 { v22.b }[8], [x20]\n"
+      "mov x19, #0x3\n"
+      "b 13f\n"
+      "9:"  // odd_loads_4_0
+      "tbz %x[width], #2, 11f\n"
+      "ldr s29, [x27], #0x4\n"
+      "ldr s28, [x26], #0x4\n"
+      "ldr s27, [x25], #0x4\n"
+      "ldr s21, [x24], #0x4\n"
+      "ldr s26, [x23], #0x4\n"
+      "ldr s25, [x22], #0x4\n"
+      "ldr s19, [x21], #0x4\n"
+      "ldr s22, [x20], #0x4\n"
+      "tbz %x[width], #1, 10f\n"
+      "ld1 { v29.h }[2], [x27], #0x2\n"
+      "ld1 { v28.h }[2], [x26], #0x2\n"
+      "ld1 { v27.h }[2], [x25], #0x2\n"
+      "ld1 { v21.h }[2], [x24], #0x2\n"
+      "ld1 { v26.h }[2], [x23], #0x2\n"
+      "ld1 { v25.h }[2], [x22], #0x2\n"
+      "ld1 { v19.h }[2], [x21], #0x2\n"
+      "ld1 { v22.h }[2], [x20], #0x2\n"
+      "mov x19, #0x2\n"
+      "tbz %x[width], #0, 13f\n"
+      "ld1 { v29.b }[6], [x27]\n"
+      "ld1 { v28.b }[6], [x26]\n"
+      "ld1 { v27.b }[6], [x25]\n"
+      "ld1 { v21.b }[6], [x24]\n"
+      "ld1 { v26.b }[6], [x23]\n"
+      "ld1 { v25.b }[6], [x22]\n"
+      "ld1 { v19.b }[6], [x21]\n"
+      "ld1 { v22.b }[6], [x20]\n"
+      "b 13f\n"
+      "10:"  // odd_loads_1_4
+      "mov x19, #0x1\n"
+      "tbz %x[width], #0, 13f\n"
+      "ld1 { v29.b }[4], [x27]\n"
+      "ld1 { v28.b }[4], [x26]\n"
+      "ld1 { v27.b }[4], [x25]\n"
+      "ld1 { v21.b }[4], [x24]\n"
+      "ld1 { v26.b }[4], [x23]\n"
+      "ld1 { v25.b }[4], [x22]\n"
+      "ld1 { v19.b }[4], [x21]\n"
+      "ld1 { v22.b }[4], [x20]\n"
+      "mov x19, #0x2\n"
+      "b 13f\n"
+      "11:"  // odd_loads_2_0
+      "tbz %x[width], #1, 12f\n"
+      "ldr h29, [x27], #0x2\n"
+      "ldr h28, [x26], #0x2\n"
+      "ldr h27, [x25], #0x2\n"
+      "ldr h21, [x24], #0x2\n"
+      "ldr h26, [x23], #0x2\n"
+      "ldr h25, [x22], #0x2\n"
+      "ldr h19, [x21], #0x2\n"
+      "ldr h22, [x20], #0x2\n"
+      "mov x19, #0x1\n"
+      "tbz %x[width], #0, 13f\n"
+      "ld1 { v29.b }[2], [x27]\n"
+      "ld1 { v28.b }[2], [x26]\n"
+      "ld1 { v27.b }[2], [x25]\n"
+      "ld1 { v21.b }[2], [x24]\n"
+      "ld1 { v26.b }[2], [x23]\n"
+      "ld1 { v25.b }[2], [x22]\n"
+      "ld1 { v19.b }[2], [x21]\n"
+      "ld1 { v22.b }[2], [x20]\n"
+      "b 13f\n"
+      "12:"  // odd_loads_1_0
+      "ldr b29, [x27, #0x0]\n"
+      "ldr b28, [x26, #0x0]\n"
+      "ldr b27, [x25, #0x0]\n"
+      "ldr b21, [x24, #0x0]\n"
+      "ldr b26, [x23, #0x0]\n"
+      "ldr b25, [x22, #0x0]\n"
+      "ldr b19, [x21, #0x0]\n"
+      "ldr b22, [x20, #0x0]\n"
+      "mov x19, #0x1\n"
+      "13:"  // Odd load end
+      "zip1 v23.4s, v29.4s, v27.4s\n"
+      "subs x19, x19, #0x1\n"
+      "zip1 v20.4s, v28.4s, v21.4s\n"
+      "zip1 v16.4s, v23.4s, v20.4s\n"
+      "str q16, [%x[out_ptr], #0x0]\n"
+      "zip1 v18.4s, v26.4s, v19.4s\n"
+      "sadalp v1.8h, v16.16b\n"
+      "zip1 v17.4s, v25.4s, v22.4s\n"
+      "zip1 v16.4s, v18.4s, v17.4s\n"
+      "str q16, [%x[out_ptr], #0x10]\n"
+      "sadalp v0.8h, v16.16b\n"
+      "add %x[out_ptr], %x[out_ptr], #0x20\n"
+      "beq 14f\n"
+      "zip2 v24.4s, v23.4s, v20.4s\n"
+      "zip2 v20.4s, v18.4s, v17.4s\n"
+      "str q24, [%x[out_ptr], #0x0]\n"
+      "sadalp v1.8h, v24.16b\n"
+      "str q20, [%x[out_ptr], #0x10]\n"
+      "sadalp v0.8h, v20.16b\n"
+      "subs x19, x19, #0x1\n"
+      "add %x[out_ptr], %x[out_ptr], #0x20\n"
+      "beq 14f\n"
+      "zip2 v27.4s, v29.4s, v27.4s\n"
+      "zip2 v23.4s, v28.4s, v21.4s\n"
+      "subs x19, x19, #0x1\n"
+      "zip1 v21.4s, v27.4s, v23.4s\n"
+      "str q21, [%x[out_ptr], #0x0]\n"
+      "zip2 v19.4s, v26.4s, v19.4s\n"
+      "sadalp v1.8h, v21.16b\n"
+      "zip2 v16.4s, v25.4s, v22.4s\n"
+      "zip1 v18.4s, v19.4s, v16.4s\n"
+      "str q18, [%x[out_ptr], #0x10]\n"
+      "sadalp v0.8h, v18.16b\n"
+      "add %x[out_ptr], %x[out_ptr], #0x20\n"
+      "beq 14f\n"
+      "zip2 v17.4s, v27.4s, v23.4s\n"
+      "zip2 v16.4s, v19.4s, v16.4s\n"
+      "str q17, [%x[out_ptr], #0x0]\n"
+      "sadalp v1.8h, v17.16b\n"
+      "str q16, [%x[out_ptr], #0x10]\n"
+      "sadalp v0.8h, v16.16b\n"
+      "add %x[out_ptr], %x[out_ptr], #0x20\n"
+      "14:"  // Odds skip
+      "sadalp v31.4s, v1.8h\n"
+      "sadalp v30.4s, v0.8h\n"
+      "str q31, [%x[out_ptr], #0x0]\n"
+      "str q30, [%x[out_ptr], #0x10]\n"
+      "add %x[out_ptr], %x[out_ptr], #0x20\n"
+      : [out_ptr] "+r" (out_ptr), [width] "+r" (width)
+      : [first] "r" (first), [height] "r" (height), [in] "r" (in), [row_offset] "r" (row_offset)
+      : "cc", "memory", "v0", "v1", "v16", "v17", "v18", "v19", "v20", "v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", "v30", "v31", "x19", "x20", "x21", "x22", "x23", "x24", "x25", "x26", "x27"
+    );
+}
+
+
+#endif // __aarch64__