From aee6552360d54556a4e22cc2121b1458c4977cbd Mon Sep 17 00:00:00 2001
From: nihuini <nihuini@tencent.com>
Date: Mon, 16 Apr 2018 17:15:34 +0800
Subject: [PATCH] memcpy is fast :)

---
 src/layer/arm/slice_arm.cpp | 110 ------------------------------------
 src/layer/arm/slice_arm.h   |  30 ----------
 2 files changed, 140 deletions(-)
 delete mode 100644 src/layer/arm/slice_arm.cpp
 delete mode 100644 src/layer/arm/slice_arm.h

diff --git a/src/layer/arm/slice_arm.cpp b/src/layer/arm/slice_arm.cpp
deleted file mode 100644
index 3b89c9001..000000000
--- a/src/layer/arm/slice_arm.cpp
+++ /dev/null
@@ -1,110 +0,0 @@
-// Tencent is pleased to support the open source community by making ncnn available.
-//
-// Copyright (C) 2017 THL A29 Limited, a Tencent company. All rights reserved.
-//
-// Licensed under the BSD 3-Clause License (the "License"); you may not use this file except
-// in compliance with the License. You may obtain a copy of the License at
-//
-// https://opensource.org/licenses/BSD-3-Clause
-//
-// 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 "slice_arm.h"
-#if __ARM_NEON
-#include <arm_neon.h>
-#endif // __ARM_NEON
-
-namespace ncnn {
-
-DEFINE_LAYER_CREATOR(Slice_arm)
-
-int Slice_arm::forward(const std::vector<Mat>& bottom_blobs, std::vector<Mat>& top_blobs) const
-{
-    const Mat& bottom_blob = bottom_blobs[0];
-    int w = bottom_blob.w;
-    int h = bottom_blob.h;
-    int channels = bottom_blob.c;
-
-    int q = 0;
-    const int* slices_ptr = slices;
-    for (size_t i=0; i<top_blobs.size(); i++)
-    {
-        int slice = slices_ptr[i];
-        if (slice == -233)
-        {
-            slice = (channels - q) / (top_blobs.size() - i);
-        }
-
-        Mat& top_blob = top_blobs[i];
-        top_blob.create(w, h, slice);
-        if (top_blob.empty())
-            return -100;
-
-        int size = bottom_blob.cstep * slice;
-
-        const float* ptr = bottom_blob.channel(q);
-        float* outptr = top_blob;
-
-#if __ARM_NEON
-        int nn = size >> 3;
-        int remain = size - (nn << 3);
-#else
-        int remain = size;
-#endif // __ARM_NEON
-
-#if __ARM_NEON
-#if __aarch64__
-        if (nn > 0)
-        {
-        asm volatile(
-            "0:                                   \n"
-            "prfm       pldl1keep, [%1, #256]     \n"
-            "ld1        {v0.4s, v1.4s}, [%1], #32 \n"
-            "subs       %w0, %w0, #1              \n"
-            "st1        {v0.4s, v1.4s}, [%2], #32 \n"
-            "bne        0b                        \n"
-            : "=r"(nn),     // %0
-              "=r"(ptr),    // %1
-              "=r"(outptr)  // %2
-            : "0"(nn),
-              "1"(ptr),
-              "2"(outptr)
-            : "cc", "memory", "v0", "v1"
-        );
-        }
-#else
-        if (nn > 0)
-        {
-        asm volatile(
-            "0:                             \n"
-            "pld        [%1, #256]          \n"
-            "vld1.f32   {d0-d3}, [%1 :128]! \n"
-            "subs       %0, #1              \n"
-            "vst1.f32   {d0-d3}, [%2 :128]! \n"
-            "bne        0b                  \n"
-            : "=r"(nn),     // %0
-              "=r"(ptr),    // %1
-              "=r"(outptr)  // %2
-            : "0"(nn),
-              "1"(ptr),
-              "2"(outptr)
-            : "cc", "memory", "q0"
-        );
-        }
-#endif // __aarch64__
-#endif // __ARM_NEON
-        for (; remain>0; remain--)
-        {
-            *outptr++ = *ptr++;
-        }
-
-        q += slice;
-    }
-
-    return 0;
-}
-
-} // namespace ncnn
diff --git a/src/layer/arm/slice_arm.h b/src/layer/arm/slice_arm.h
deleted file mode 100644
index 16e97dc82..000000000
--- a/src/layer/arm/slice_arm.h
+++ /dev/null
@@ -1,30 +0,0 @@
-// Tencent is pleased to support the open source community by making ncnn available.
-//
-// Copyright (C) 2017 THL A29 Limited, a Tencent company. All rights reserved.
-//
-// Licensed under the BSD 3-Clause License (the "License"); you may not use this file except
-// in compliance with the License. You may obtain a copy of the License at
-//
-// https://opensource.org/licenses/BSD-3-Clause
-//
-// 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.
-
-#ifndef LAYER_SLICE_ARM_H
-#define LAYER_SLICE_ARM_H
-
-#include "slice.h"
-
-namespace ncnn {
-
-class Slice_arm : public Slice
-{
-public:
-    virtual int forward(const std::vector<Mat>& bottom_blobs, std::vector<Mat>& top_blobs) const;
-};
-
-} // namespace ncnn
-
-#endif // LAYER_SLICE_ARM_H