add new GPU kernel ReciprocalGrad

mindspore/ccsrc/backend/kernel_compiler/gpu/cuda_impl/unary_op_grad_impl.cu

@@ -1,5 +1,5 @@
 /**
- * Copyright 2020 Huawei Technologies Co., Ltd
+ * Copyright 2020-2021 Huawei Technologies Co., Ltd
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -26,6 +26,7 @@ __global__ void SqrtGradKernel(const T *input, const T *dout, T *output, const s
   }
   return;
 }
+
 template <typename T>
 __global__ void RsqrtGradKernel(const T *input, const T *dout, T *output, const size_t count) {
   for (size_t i = blockIdx.x * blockDim.x + threadIdx.x; i < (count); i += blockDim.x * gridDim.x) {
@@ -37,6 +38,7 @@ __global__ void RsqrtGradKernel(const T *input, const T *dout, T *output, const
   }
   return;
 }
+
 template <typename T>
 __global__ void AsinGradKernel(const T *input, const T *dout, T *output, const size_t count) {
   for (size_t i = blockIdx.x * blockDim.x + threadIdx.x; i < (count); i += blockDim.x * gridDim.x) {
@@ -46,6 +48,7 @@ __global__ void AsinGradKernel(const T *input, const T *dout, T *output, const s
   }
   return;
 }
+
 template <>
 __global__ void AsinGradKernel(const half *input, const half *dout, half *output, const size_t count) {
   for (size_t i = blockIdx.x * blockDim.x + threadIdx.x; i < (count); i += blockDim.x * gridDim.x) {
@@ -55,6 +58,7 @@ __global__ void AsinGradKernel(const half *input, const half *dout, half *output
   }
   return;
 }
+
 template <typename T>
 __global__ void ACosGradKernel(const T *input, const T *dout, T *output, const size_t count) {
   for (size_t i = blockIdx.x * blockDim.x + threadIdx.x; i < (count); i += blockDim.x * gridDim.x) {
@@ -65,6 +69,7 @@ __global__ void ACosGradKernel(const T *input, const T *dout, T *output, const s
   }
   return;
 }
+
 template <>
 __global__ void ACosGradKernel(const half *input, const half *dout, half *output, const size_t count) {
   for (size_t i = blockIdx.x * blockDim.x + threadIdx.x; i < (count); i += blockDim.x * gridDim.x) {
@@ -75,6 +80,7 @@ __global__ void ACosGradKernel(const half *input, const half *dout, half *output
   }
   return;
 }
+
 template <typename T>
 __global__ void AtanGradKernel(const T *input, const T *dout, T *output, const size_t count) {
   for (size_t i = blockIdx.x * blockDim.x + threadIdx.x; i < (count); i += blockDim.x * gridDim.x) {
@@ -84,6 +90,7 @@ __global__ void AtanGradKernel(const T *input, const T *dout, T *output, const s
   }
   return;
 }
+
 template <typename T>
 __global__ void AsinhGradKernel(const T *input, const T *dout, T *output, const size_t count) {
   for (size_t i = blockIdx.x * blockDim.x + threadIdx.x; i < (count); i += blockDim.x * gridDim.x) {
@@ -93,6 +100,7 @@ __global__ void AsinhGradKernel(const T *input, const T *dout, T *output, const
   }
   return;
 }
+
 template <typename T>
 __global__ void AcoshGradKernel(const T *input, const T *dout, T *output, const size_t count) {
   for (size_t i = blockIdx.x * blockDim.x + threadIdx.x; i < (count); i += blockDim.x * gridDim.x) {
@@ -102,11 +110,24 @@ __global__ void AcoshGradKernel(const T *input, const T *dout, T *output, const
   }
   return;
 }
+
+template <typename T>
+__global__ void ReciprocalGradKernel(const T *input, const T *dout, T *output, const size_t count) {
+  for (size_t i = blockIdx.x * blockDim.x + threadIdx.x; i < count; i += blockDim.x * gridDim.x) {
+    float inputf = static_cast<float>(input[i]);
+    float doutf = static_cast<float>(dout[i]);
+    float res = -1 * doutf * inputf * inputf;
+    output[i] = static_cast<T>(res);
+  }
+  return;
+}
+
 template <typename T>
 void SqrtGrad(const T *input, const T *dout, T *output, const size_t count, cudaStream_t cuda_stream) {
   SqrtGradKernel<<<GET_BLOCKS(count), GET_THREADS, 0, cuda_stream>>>(input, dout, output, count);
   return;
 }
+
 template <typename T>
 void RsqrtGrad(const T *input, const T *dout, T *output, const size_t count, cudaStream_t cuda_stream) {
   RsqrtGradKernel<<<GET_BLOCKS(count), GET_THREADS, 0, cuda_stream>>>(input, dout, output, count);
@@ -143,20 +164,28 @@ void AcoshGrad(const T *input, const T *dout, T *output, const size_t count, cud
   return;
 }
 
+template <typename T>
+void ReciprocalGrad(const T *input, const T *dout, T *output, const size_t count, cudaStream_t cuda_stream) {
+  ReciprocalGradKernel<<<GET_BLOCKS(count), GET_THREADS, 0, cuda_stream>>>(input, dout, output, count);
+  return;
+}
+
 template void SqrtGrad<float>(const float *input, const float *dout, float *output, const size_t count,
                               cudaStream_t cuda_stream);
 template void RsqrtGrad<float>(const float *input, const float *dout, float *output, const size_t count,
                                cudaStream_t cuda_stream);
 template void AsinGrad<float>(const float *input, const float *dout, float *output, const size_t count,
-                               cudaStream_t cuda_stream);
+                              cudaStream_t cuda_stream);
 template void ACosGrad<float>(const float *input, const float *dout, float *output, const size_t count,
-                               cudaStream_t cuda_stream);
+                              cudaStream_t cuda_stream);
 template void AtanGrad<float>(const float *input, const float *dout, float *output, const size_t count,
                               cudaStream_t cuda_stream);
 template void AsinhGrad<float>(const float *input, const float *dout, float *output, const size_t count,
-                              cudaStream_t cuda_stream);
+                               cudaStream_t cuda_stream);
 template void AcoshGrad<float>(const float *input, const float *dout, float *output, const size_t count,
                                cudaStream_t cuda_stream);
+template void ReciprocalGrad<float>(const float *input, const float *dout, float *output, const size_t count,
+                                    cudaStream_t cuda_stream);
 template void SqrtGrad<half>(const half *input, const half *dout, half *output, const size_t count,
                              cudaStream_t cuda_stream);
 template void RsqrtGrad<half>(const half *input, const half *dout, half *output, const size_t count,
@@ -164,10 +193,12 @@ template void RsqrtGrad<half>(const half *input, const half *dout, half *output,
 template void AsinGrad<half>(const half *input, const half *dout, half *output, const size_t count,
                              cudaStream_t cuda_stream);
 template void ACosGrad<half>(const half *input, const half *dout, half *output, const size_t count,
-                              cudaStream_t cuda_stream);
+                             cudaStream_t cuda_stream);
 template void AtanGrad<half>(const half *input, const half *dout, half *output, const size_t count,
                              cudaStream_t cuda_stream);
 template void AsinhGrad<half>(const half *input, const half *dout, half *output, const size_t count,
-                             cudaStream_t cuda_stream);
+                              cudaStream_t cuda_stream);
 template void AcoshGrad<half>(const half *input, const half *dout, half *output, const size_t count,
                               cudaStream_t cuda_stream);
+template void ReciprocalGrad<half>(const half *input, const half *dout, half *output, const size_t count,
+                                   cudaStream_t cuda_stream);

mindspore/ccsrc/backend/kernel_compiler/gpu/cuda_impl/unary_op_grad_impl.cuh

@@ -1,5 +1,5 @@
 /**
- * Copyright 2020 Huawei Technologies Co., Ltd
+ * Copyright 2020-2021 Huawei Technologies Co., Ltd
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -32,6 +32,7 @@ template <typename T>
 void AsinhGrad(const T *input, const T *dout, T *output, const size_t count, cudaStream_t cuda_stream);
 template <typename T>
 void AcoshGrad(const T *input, const T *dout, T *output, const size_t count, cudaStream_t cuda_stream);
-
+template <typename T>
+void ReciprocalGrad(const T *input, const T *dout, T *output, const size_t count, cudaStream_t cuda_stream);
 
 #endif  // MINDSPORE_CCSRC_KERNEL_GPU_CUDA_IMPL_UNARYOP_GRAD_IMPL_H_

mindspore/ccsrc/backend/kernel_compiler/gpu/math/unary_op_grad_gpu_kernel.cc

@@ -1,5 +1,5 @@
 /**
- * Copyright 2019 Huawei Technologies Co., Ltd
+ * Copyright 2019-2021 Huawei Technologies Co., Ltd
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -74,5 +74,13 @@ MS_REG_GPU_KERNEL_ONE(
   AcoshGrad,
   KernelAttr().AddInputAttr(kNumberTypeFloat16).AddInputAttr(kNumberTypeFloat16).AddOutputAttr(kNumberTypeFloat16),
   UnaryGradOpGpuKernel, half)
+MS_REG_GPU_KERNEL_ONE(
+  ReciprocalGrad,
+  KernelAttr().AddInputAttr(kNumberTypeFloat32).AddInputAttr(kNumberTypeFloat32).AddOutputAttr(kNumberTypeFloat32),
+  UnaryGradOpGpuKernel, float)
+MS_REG_GPU_KERNEL_ONE(
+  ReciprocalGrad,
+  KernelAttr().AddInputAttr(kNumberTypeFloat16).AddInputAttr(kNumberTypeFloat16).AddOutputAttr(kNumberTypeFloat16),
+  UnaryGradOpGpuKernel, half)
 }  // namespace kernel
 }  // namespace mindspore

mindspore/ccsrc/backend/kernel_compiler/gpu/math/unary_op_grad_gpu_kernel.h

@@ -1,5 +1,5 @@
 /**
- * Copyright 2019 Huawei Technologies Co., Ltd
+ * Copyright 2019-2021 Huawei Technologies Co., Ltd
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -35,12 +35,14 @@ enum UnaryGradOptype {
   UNARY_OP_ATAN_GRAD = 4,
   UNARY_OP_ASINH_GRAD = 5,
   UNARY_OP_ACOSH_GRAD = 6,
+  UNARY_OP_RECIPROCAL_GRAD = 7,
   UNARY_OP_GRAD_INVALID_TYPE = 255
 };
 static const std::map<std::string, UnaryGradOptype> kUnaryGradOpTypeMap = {
-  {"SqrtGrad", UNARY_OP_SQRT_GRAD},  {"RsqrtGrad", UNARY_OP_RSQRT_GRAD}, {"AsinGrad", UNARY_OP_ASIN_GRAD},
-  {"ACosGrad", UNARY_OP_ACOS_GRAD},  {"AtanGrad", UNARY_OP_ATAN_GRAD},   {"AsinhGrad", UNARY_OP_ASINH_GRAD},
-  {"AcoshGrad", UNARY_OP_ACOSH_GRAD}};
+  {"SqrtGrad", UNARY_OP_SQRT_GRAD},   {"RsqrtGrad", UNARY_OP_RSQRT_GRAD},
+  {"AsinGrad", UNARY_OP_ASIN_GRAD},   {"ACosGrad", UNARY_OP_ACOS_GRAD},
+  {"AtanGrad", UNARY_OP_ATAN_GRAD},   {"AsinhGrad", UNARY_OP_ASINH_GRAD},
+  {"AcoshGrad", UNARY_OP_ACOSH_GRAD}, {"ReciprocalGrad", UNARY_OP_RECIPROCAL_GRAD}};
 
 template <typename T>
 class UnaryGradOpGpuKernel : public GpuKernel {
@@ -101,6 +103,11 @@ class UnaryGradOpGpuKernel : public GpuKernel {
                   reinterpret_cast<cudaStream_t>(stream_ptr));
         break;
       }
+      case UNARY_OP_RECIPROCAL_GRAD: {
+        ReciprocalGrad(input_x_addr, input_dx_addr, output_y_addr, inputs[0]->size / sizeof(T),
+                       reinterpret_cast<cudaStream_t>(stream_ptr));
+        break;
+      }
       default: {
         MS_LOG(EXCEPTION) << "Unary grad operation " << unary_grad_op_type_ << " is not supported.";
       }

mindspore/ops/_grad/grad_math_ops.py

@@ -1,4 +1,4 @@
-# Copyright 2020 Huawei Technologies Co., Ltd
+# Copyright 2020-2021 Huawei Technologies Co., Ltd
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -448,22 +448,11 @@ def get_bprop_rsqrt(self):
 @bprop_getters.register(P.Reciprocal)
 def get_bprop_reciprocal(self):
     """Grad definition for `Reciprocal` operation."""
-    if self.target == "GPU":
-        neg = P.Neg()
-        mul = P.Mul()
-        square = P.Square()
-        reciprocal = P.Reciprocal()
-
-        def bprop(x, out, dout):
-            g = neg(reciprocal(square(x)))
-            dx = mul(dout, g)
-            return (dx,)
-    else:
-        reciprocal_grad = G.ReciprocalGrad()
+    reciprocal_grad = G.ReciprocalGrad()
 
-        def bprop(x, out, dout):
-            dx = reciprocal_grad(out, dout)
-            return (dx,)
+    def bprop(x, out, dout):
+        dx = reciprocal_grad(out, dout)
+        return (dx,)
 
     return bprop
 

tests/st/ops/gpu/test_reciprocal_grad_op.py

@@ -0,0 +1,91 @@
+# Copyright 2021 Huawei Technologies Co., Ltd
+#
+# 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.
+# ============================================================================
+
+import numpy as np
+import pytest
+
+import mindspore.context as context
+import mindspore.nn as nn
+from mindspore import Tensor
+from mindspore.ops.operations import _grad_ops as G
+
+
+class NetReciprocalGrad(nn.Cell):
+    def __init__(self):
+        super(NetReciprocalGrad, self).__init__()
+        self.grad = G.ReciprocalGrad()
+
+    def construct(self, y, dy):
+        return self.grad(y, dy)
+
+
+@pytest.mark.level0
+@pytest.mark.platform_x86_gpu_training
+@pytest.mark.env_onecard
+def test_reciprocal_grad_float32():
+    context.set_context(mode=context.PYNATIVE_MODE, device_target="GPU")
+    y = Tensor(np.array([[[[-1, 1, 12],
+                           [5, 34, 6],
+                           [10, 2, -1]]]]).astype(np.float32))
+    dy = Tensor(np.array([[[[29, 1, 55],
+                            [2.2, 63, 2],
+                            [3, 3, 12]]]]).astype(np.float32))
+    expect = np.array([[[[-29, -1, -7920],
+                         [-55, -72828, -72],
+                         [-300, -12, -12]]]]).astype(np.float32)
+    net = NetReciprocalGrad()
+    output = net(y, dy)
+    np.testing.assert_array_almost_equal(output.asnumpy(), expect)
+
+    context.set_context(mode=context.GRAPH_MODE, device_target="GPU")
+    y = Tensor(np.array([[[[-1, 1, 12],
+                           [5, 34, 6],
+                           [10, 2, -1]]]]).astype(np.float32))
+    dy = Tensor(np.array([[[[29, 1, 55],
+                            [2.2, 63, 2],
+                            [3, 3, 12]]]]).astype(np.float32))
+    expect = np.array([[[[-29, -1, -7920],
+                         [-55, -72828, -72],
+                         [-300, -12, -12]]]]).astype(np.float32)
+    net = NetReciprocalGrad()
+    output = net(y, dy)
+    np.testing.assert_array_almost_equal(output.asnumpy(), expect)
+
+
+@pytest.mark.level0
+@pytest.mark.platform_x86_gpu_training
+@pytest.mark.env_onecard
+def test_reciprocal_grad_float16():
+    context.set_context(mode=context.PYNATIVE_MODE, device_target="GPU")
+    y = Tensor(np.array([[0.01, 0.2, 0.22],
+                         [10.002, 2, -1]]).astype(np.float16))
+    dy = Tensor(np.array([[34, 1, 55],
+                          [3, 3, 63]]).astype(np.float16))
+    expect = np.array([[-0.0034, -0.03998, -2.662],
+                       [-300, -12, -63]]).astype(np.float16)
+    net = NetReciprocalGrad()
+    output = net(y, dy)
+    np.testing.assert_array_almost_equal(output.asnumpy(), expect)
+
+    context.set_context(mode=context.GRAPH_MODE, device_target="GPU")
+    y = Tensor(np.array([[0.01, 0.2, 0.22],
+                         [10.002, 2, -1]]).astype(np.float16))
+    dy = Tensor(np.array([[34, 1, 55],
+                          [3, 3, 63]]).astype(np.float16))
+    expect = np.array([[-0.0034, -0.03998, -2.662],
+                       [-300, -12, -63]]).astype(np.float16)
+    net = NetReciprocalGrad()
+    output = net(y, dy)
+    np.testing.assert_array_almost_equal(output.asnumpy(), expect)