From f92fdc27797e7c39b402840f55f0fcd292f23d63 Mon Sep 17 00:00:00 2001
From: dolphin8 <haipengwang03@163.com>
Date: Wed, 12 Sep 2018 14:11:20 +0800
Subject: [PATCH] reshape

---
 .../Kernels/metal/ReshapeKernel.metal.inc     | 137 ++++++++++++++++++
 1 file changed, 137 insertions(+)
 create mode 100644 metal/paddle-mobile/paddle-mobile/Operators/Kernels/metal/ReshapeKernel.metal.inc

diff --git a/metal/paddle-mobile/paddle-mobile/Operators/Kernels/metal/ReshapeKernel.metal.inc b/metal/paddle-mobile/paddle-mobile/Operators/Kernels/metal/ReshapeKernel.metal.inc
new file mode 100644
index 0000000000..399287da71
--- /dev/null
+++ b/metal/paddle-mobile/paddle-mobile/Operators/Kernels/metal/ReshapeKernel.metal.inc
@@ -0,0 +1,137 @@
+/* Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
+ 
+ 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
+ 
+ http://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 <metal_stdlib>
+#include "Common.metal"
+
+using namespace metal;
+
+struct ReshapeParam {
+  int32_t idim[4];
+  int32_t itrans[4];
+  int32_t odim[4];
+  int32_t otrans[4];
+};
+
+//kernel void reshape(texture2d_array<float, access::read> inTexture [[texture(0)]],
+//                    texture2d_array<float, access::write> outTexture [[texture(1)]],
+//                    constant ReshapeParam &rp [[buffer(0)]],
+//                    uint3 gid [[thread_position_in_grid]]) {
+//  if (gid.x >= outTexture.get_width() ||
+//      gid.y >= outTexture.get_height() ||
+//      gid.z >= outTexture.get_array_size()) return;
+//
+//  int oxyzn[4] = {int(gid.x), int(gid.y), int(gid.z), 0}, oabcd[4], ixyzn[4];
+//  ReshapeParam lrp = rp;
+//  int oC = lrp.odim[lrp.otrans[3]];
+//  int iC = lrp.idim[lrp.itrans[3]];
+//  int count = lrp.odim[0] * lrp.odim[1] * lrp.odim[2] * lrp.odim[3];
+//  float4 r;
+//  for (int n = 0; n < 4; n++) {
+//    oxyzn[3] = n;
+//
+//    //4  (gid.x gid.y, gid.z, 0~4)
+//    xyzn2abcd(oC, oxyzn, oabcd);
+//    int tabcd[4];
+//    invtrans(lrp.otrans, oabcd, tabcd);
+//    int index = abcd2index(lrp.odim, tabcd);
+//    if (index < count) {
+//      int c = index % 4;
+//
+//      int temp0 = index % (inTexture.get_array_size() * 4);
+//      int slice = temp0 / 4;
+//
+//      int temp1 = index % (inTexture.get_array_size() * 4 * lrp.idim[2]);
+//      int w = temp1 / (inTexture.get_array_size() * 4);
+//
+//      int h = index / (inTexture.get_array_size() * 4 * lrp.idim[2]);
+//
+////      index2abcd(lrp.idim, index, tabcd);
+////      abcd2xyzn(iC, tabcd, ixyzn);
+//      r[n] = inTexture.read(uint2(w, h), slice)[c];
+//    } else {
+//      r[n] = 0;
+//    }
+//  }
+//  outTexture.write(r, gid.xy, gid.z);
+//}
+
+
+
+
+kernel void reshape(texture2d_array<float, access::read> inTexture [[texture(0)]],
+                    texture2d_array<float, access::write> outTexture [[texture(1)]],
+                    constant ReshapeParam &rp [[buffer(0)]],
+                    uint3 gid [[thread_position_in_grid]]) {
+  if (gid.x >= outTexture.get_width() ||
+      gid.y >= outTexture.get_height() ||
+      gid.z >= outTexture.get_array_size()) return;
+
+  int oxyzn[4] = {int(gid.x), int(gid.y), int(gid.z), 0}, oabcd[4], ixyzn[4], iabcd[4];
+  ReshapeParam lrp = rp;
+  int oC = lrp.odim[lrp.otrans[3]];
+  int iC = lrp.idim[lrp.itrans[3]];
+  int count = lrp.odim[0] * lrp.odim[1] * lrp.odim[2] * lrp.odim[3];
+  float4 r;
+  for (int n = 0; n < 4; n++) {
+    oxyzn[3] = n;
+    xyzn2abcd(oC, oxyzn, oabcd);
+    int tabcd[4];
+    invtrans(lrp.otrans, oabcd, tabcd);
+    int index = abcd2index(lrp.odim, tabcd);
+    if (index < count) {
+      index2abcd(lrp.idim, index, tabcd);
+      trans(lrp.itrans, tabcd, iabcd);
+      abcd2xyzn(iC, iabcd, ixyzn);
+      r[n] = inTexture.read(uint2(ixyzn[0], ixyzn[1]), ixyzn[2])[ixyzn[3]];
+    } else {
+      r[n] = 0;
+    }
+  }
+  outTexture.write(r, gid.xy, gid.z);
+}
+
+
+kernel void reshape_half(texture2d_array<half, access::read> inTexture [[texture(0)]],
+                    texture2d_array<half, access::write> outTexture [[texture(1)]],
+                    constant ReshapeParam &rp [[buffer(0)]],
+                    uint3 gid [[thread_position_in_grid]]) {
+  if (gid.x >= outTexture.get_width() ||
+      gid.y >= outTexture.get_height() ||
+      gid.z >= outTexture.get_array_size()) return;
+  
+  int oxyzn[4] = {int(gid.x), int(gid.y), int(gid.z), 0}, oabcd[4], ixyzn[4], iabcd[4];
+  ReshapeParam lrp = rp;
+  int oC = lrp.odim[lrp.otrans[3]];
+  int iC = lrp.idim[lrp.itrans[3]];
+  int count = lrp.odim[0] * lrp.odim[1] * lrp.odim[2] * lrp.odim[3];
+  half4 r;
+  for (int n = 0; n < 4; n++) {
+    oxyzn[3] = n;
+    xyzn2abcd(oC, oxyzn, oabcd);
+    int tabcd[4];
+    invtrans(lrp.otrans, oabcd, tabcd);
+    int index = abcd2index(lrp.odim, tabcd);
+    if (index < count) {
+      index2abcd(lrp.idim, index, tabcd);
+      trans(lrp.itrans, tabcd, iabcd);
+      abcd2xyzn(iC, iabcd, ixyzn);
+      r[n] = inTexture.read(uint2(ixyzn[0], ixyzn[1]), ixyzn[2])[ixyzn[3]];
+    } else {
+      r[n] = 0;
+    }
+  }
+  outTexture.write(r, gid.xy, gid.z);
+}
+
-- 
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