COMPMID-3776: Indirect GEMM

Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Change-Id: I51a1b0f098bc3a8c408c50c92221e4df3061e12c
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/4343
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Sang-Hoon Park <sang-hoon.park@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
diff --git a/src/core/NEON/kernels/arm_gemm/indirect-interleaves/a32_interleave6_block1_fp32_fp32.hpp b/src/core/NEON/kernels/arm_gemm/indirect-interleaves/a32_interleave6_block1_fp32_fp32.hpp
new file mode 100644
index 0000000..807511f
--- /dev/null
+++ b/src/core/NEON/kernels/arm_gemm/indirect-interleaves/a32_interleave6_block1_fp32_fp32.hpp
@@ -0,0 +1,151 @@
+/*
+ * Copyright (c) 2017-2018 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.
+ */
+#pragma once
+
+#ifdef __arm__
+
+#include <arm_neon.h>
+
+#include "../asmlib.hpp"
+
+template<>
+void interleave_block<6, 1, VLType::None, false>(
+    float * &outptr, const float * const * in, size_t width, size_t height,
+    size_t row_offset, bool
+)
+{
+    const float *inptr0 = in[0] + row_offset;
+    const float *inptr1 = in[1] + row_offset;
+    const float *inptr2 = in[2] + row_offset;
+    const float *inptr3 = in[3] + row_offset;
+    const float *inptr4 = in[4] + row_offset;
+    const float *inptr5 = in[5] + row_offset;
+
+    // Cope with ragged cases by aliasing the first row (which is always valid).
+    // The nonsense output produced will be suppressed later anyway.
+    switch (height) {
+        case 1:
+            inptr1 = inptr0;
+            // fall through
+        case 2:
+            inptr2 = inptr0;
+            // fall through
+        case 3:
+            inptr3 = inptr0;
+            // fall through
+        case 4:
+            inptr4 = inptr0;
+            // fall through
+        case 5:
+            inptr5 = inptr0;
+            // fall through
+        default:
+        case 6:
+            break;
+    }
+
+    //prefetch_2x(inptr0);
+    //prefetch_2x(inptr1);
+    //prefetch_2x(inptr2);
+    //prefetch_2x(inptr3);
+    //prefetch_2x(inptr4);
+    //prefetch_2x(inptr5);
+
+    for (;width>7;width-=8) {
+        __asm __volatile (
+            // Load up 8 elements (2 vectors) from each of 8 sources.
+            "VLD1.32	{d0-d3}, [%[inptr0]]!\n"   // q0=A0A1A2A3
+            "VLD1.32	{d4-d7}, [%[inptr1]]!\n"   // q2=B0B1B2B3
+            "VLD1.32	{d8-d11}, [%[inptr2]]!\n"  // q4=C0C1C2C3
+            "VZIP.32	q0, q4\n"     // q0=A0C0A1C1, q4 = A2C2A3C3
+            "VLD1.32	{d12-d15}, [%[inptr3]]!\n" // q6=D0D1D2D3
+            "VZIP.32	q2, q6\n"     // q2=B0D0B1D1, q6 = B2D2B3D3
+            "VLD1.32	{d16-d19}, [%[inptr4]]!\n"
+            "VLD1.32	{d20-d23}, [%[inptr5]]!\n"
+            "VZIP.32	q8, q10\n"    // q8=E0F0E1F1, q10 = E2F2E3F3
+            ASM_PREFETCH("[%[inptr0], #128]")
+            "VZIP.32	q0, q2\n"    // q0 = A0B0C0D0, q2 = A1B1C1D1
+
+            // Store first elements
+            "VST1.32	{d0-d1}, [%[outptr]]!\n"
+            "VST1.32	{d16}, [%[outptr]]!\n"
+
+            "VZIP.32	q4, q6\n"    // q4 = A2B2C2D2, q6 = A3B3C3D3
+
+            // Store second elements
+            "VST1.32	{d4-d5}, [%[outptr]]!\n"
+            "VZIP.32	q1, q5\n"
+            ASM_PREFETCH("[%[inptr1], #128]")
+            "VST1.32	{d17}, [%[outptr]]!\n"
+            "VZIP.32	q3, q7\n"
+
+            // Store third elements
+            "VZIP.32	q9, q11\n"
+            "VST1.32	{d8-d9}, [%[outptr]]!\n"
+            "VZIP.32	q1, q3\n"
+            ASM_PREFETCH("[%[inptr2], #128]")
+            "VST1.32	{d20}, [%[outptr]]!\n"
+
+            // Store fourth elements
+            "VZIP.32	q5, q7\n"
+            "VST1.32	{d12-d13}, [%[outptr]]!\n"
+            ASM_PREFETCH("[%[inptr3], #128]")
+            "VST1.32	{d21}, [%[outptr]]!\n"
+
+            // Fifth
+            "VST1.32	{d2-d3}, [%[outptr]]!\n"
+            ASM_PREFETCH("[%[inptr4], #128]")
+            "VST1.32	{d18}, [%[outptr]]!\n"
+
+            // Sixth
+            "VST1.32	{d6-d7}, [%[outptr]]!\n"
+            ASM_PREFETCH("[%[inptr5], #128]")
+            "VST1.32	{d19}, [%[outptr]]!\n"
+
+            // Seventh
+            "VST1.32	{d10-d11}, [%[outptr]]!\n"
+            "VST1.32	{d22}, [%[outptr]]!\n"
+
+            // Eighth
+            "VST1.32	{d14-d15}, [%[outptr]]!\n"
+            "VST1.32	{d23}, [%[outptr]]!\n"
+
+            : [inptr0] "+r" (inptr0), [inptr1] "+r" (inptr1), [inptr2] "+r" (inptr2), [inptr3] "+r" (inptr3),
+              [inptr4] "+r" (inptr4), [inptr5] "+r" (inptr5), [outptr] "+r" (outptr)
+            :
+            : "q0", "q1", "q2", "q3", "q4", "q5", "q6", "q7", "q8", "q9", "q10", "q11", "q12", "memory"
+        );
+    }
+
+    for (;width>0;width--) {
+        *outptr++ = *inptr0++;
+        *outptr++ = *inptr1++;
+        *outptr++ = *inptr2++;
+        *outptr++ = *inptr3++;
+        *outptr++ = *inptr4++;
+        *outptr++ = *inptr5++;
+    }
+}
+
+#endif  // __arm__