APPBROWSER-400: Implement the tensorshift kernel for fixing DC's alignment issue on OpenGL ES

Change-Id: I7a8489bb0fddc72899ea165e414ee87bdbfb45b3
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/118106
Reviewed-by: Joel Liang <joel.liang@arm.com>
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>

1 files changed, 134 insertions, 0 deletions

diff --git a/src/core/GLES_COMPUTE/cs_shaders/tensor_shift.cs b/src/core/GLES_COMPUTE/cs_shaders/tensor_shift.cs
new file mode 100644
index 0000000000..a0af315c76
--- /dev/null
+++ b/src/core/GLES_COMPUTE/cs_shaders/tensor_shift.cs
@@ -0,0 +1,134 @@
+/*
+ * 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.
+ */
+
+layout(local_size_x = LOCAL_SIZE_X, local_size_y = LOCAL_SIZE_Y, local_size_z = LOCAL_SIZE_Z) in;
+
+#include "helpers_cs.h"
+
+#if defined(DATA_TYPE_FP16)
+precision mediump float;
+#endif // DATA_TYPE_FP16
+
+/** This kernel performs a shift to move "pad_x" columns to the right.
+ *
+ * @note The data type must be passed at compile time using "#define DATA_TYPE_NAME". e.g. "#define DATA_TYPE_FP32"
+ * @note The width must be passed at compile time using "#define WIDTH n" e.g. "#define WIDTH 1"
+ *
+ * @param[in,out] src_ptr   Pointer to the source tensor slice. Supported data types: F16/F32
+ * @param[in]     src_attrs The attributes of the source tensor
+ * @param[in]     pad_x     The padding of the source tensor in x dimension
+ */
+SHADER_PARAMS_DECLARATION
+{
+    Tensor3DAttributes src_attrs;
+    uint               pad_x;
+};
+
+#if defined(DATA_TYPE_FP16)
+TENSOR_DECLARATION(1, srcBuffer, uint, src_ptr, src_shift, 2, restrict);
+
+void main()
+{
+    Tensor3DIterator src_iter = CONVERT_TO_TENSOR3D_ITERATOR(src_attrs, src_shift);
+    int              n        = int(pad_x) % 2;
+
+    if(n == 1)
+    {
+        int i = 0;
+        if((WIDTH % 2) == 1)
+        {
+            i = WIDTH + int(pad_x) - 2;
+        }
+        else
+        {
+            vec2 s0_end = LOAD_UNPACK2_HALF(src_ptr, TENSOR_OFFSET_ADVANCE_IN_BYTES(src_iter, (2 * (WIDTH - 2))));
+            vec2 s_end  = vec2(s0_end.y, 0.f);
+            STORE_PACK2_HALF(src_ptr, TENSOR_OFFSET_ADVANCE_IN_BYTES(src_iter, (2 * (WIDTH + int(pad_x) - 1))), s_end);
+            i = WIDTH + int(pad_x) - 3;
+        }
+        for(; i >= (int(pad_x) + 1); i = i - 2)
+        {
+            vec2 s0 = LOAD_UNPACK2_HALF(src_ptr, TENSOR_OFFSET_ADVANCE_IN_BYTES(src_iter, (2 * (i - int(pad_x) - 1))));
+            vec2 s1 = LOAD_UNPACK2_HALF(src_ptr, TENSOR_OFFSET_ADVANCE_IN_BYTES(src_iter, (2 * (i - int(pad_x) + 1))));
+            vec2 s  = vec2(s0.y, s1.x);
+            STORE_PACK2_HALF(src_ptr, TENSOR_OFFSET_ADVANCE_IN_BYTES(src_iter, (2 * i)), s);
+        }
+        for(int j = 0; j < (int(pad_x) - 1); j = j + 2)
+        {
+            vec2 s_origin = vec2(0.f);
+            STORE_PACK2_CURRENT_ITEM_HALF(src_ptr, src_iter, s_origin);
+            TENSOR_ITERATOR_ADVANCE_IN_BYTES(src_iter, 4);
+        }
+        vec2 s0_origin = LOAD_UNPACK2_CURRENT_ITEM_HALF(src_ptr, src_iter);
+        vec2 s_origin  = vec2(0.f, s0_origin.x);
+        STORE_PACK2_CURRENT_ITEM_HALF(src_ptr, src_iter, s_origin);
+    }
+    else
+    {
+        int i = 0;
+        if((WIDTH % 2) == 0)
+        {
+            i = WIDTH + int(pad_x) - 2;
+        }
+        else
+        {
+            vec2 s0_end = LOAD_UNPACK2_HALF(src_ptr, TENSOR_OFFSET_ADVANCE_IN_BYTES(src_iter, (2 * (WIDTH - 1))));
+            vec2 s_end  = vec2(s0_end.x, 0.f);
+            STORE_PACK2_HALF(src_ptr, TENSOR_OFFSET_ADVANCE_IN_BYTES(src_iter, (2 * (WIDTH + int(pad_x) - 1))), s_end);
+            i = WIDTH + int(pad_x) - 3;
+        }
+        for(; i >= (int(pad_x)); i = i - 2)
+        {
+            vec2 s = LOAD_UNPACK2_HALF(src_ptr, TENSOR_OFFSET_ADVANCE_IN_BYTES(src_iter, (2 * (i - int(pad_x)))));
+            STORE_PACK2_HALF(src_ptr, TENSOR_OFFSET_ADVANCE_IN_BYTES(src_iter, (2 * i)), s);
+        }
+        for(int j = 0; j < int(pad_x); j = j + 2)
+        {
+            vec2 s = vec2(0.f);
+            STORE_PACK2_CURRENT_ITEM_HALF(src_ptr, src_iter, s);
+            TENSOR_ITERATOR_ADVANCE_IN_BYTES(src_iter, 4);
+        }
+    }
+}
+#elif defined(DATA_TYPE_FP32)
+TENSOR_DECLARATION(1, srcBuffer, float, src_ptr, src_shift, 2, restrict);
+
+void main()
+{
+    Tensor3DIterator src_iter = CONVERT_TO_TENSOR3D_ITERATOR(src_attrs, src_shift);
+
+    for(int i = (WIDTH + int(pad_x) - 1); i >= int(pad_x); i--)
+    {
+        float sorigin = LOAD(src_ptr, TENSOR_OFFSET_ADVANCE(src_iter, (i - int(pad_x))));
+        STORE(src_ptr, TENSOR_OFFSET_ADVANCE(src_iter, i), sorigin);
+    }
+    for(int j = 0; j < int(pad_x); j++)
+    {
+        STORE_CURRENT_ITEM(src_ptr, src_iter, 0.f);
+        TENSOR_ITERATOR_ADVANCE_IN_BYTES(src_iter, 4);
+    }
+}
+#else /* DATA_TYPE_FP16 */
+#error Data type not supported
+#endif /* DATA_TYPE_FP16 */