Adds Conv2dDescriptor::set_group_count (#145)

src/cudnn/result.rs

@@ -238,7 +238,7 @@ pub unsafe fn set_convolution2d_descriptor(
     .result()
 }
 
-/// Set See [nvidia docs](https://docs.nvidia.com/deeplearning/cudnn/api/index.html#cudnnSetConvolutionMathType).
+/// See [nvidia docs](https://docs.nvidia.com/deeplearning/cudnn/api/index.html#cudnnSetConvolutionMathType).
 /// # Safety
 /// `desc` must NOT have been freed already
 pub unsafe fn set_convolution_math_type(
@@ -248,6 +248,16 @@ pub unsafe fn set_convolution_math_type(
     sys::cudnnSetConvolutionMathType(desc, math_type).result()
 }
 
+/// See [nvidia docs](https://docs.nvidia.com/deeplearning/cudnn/api/index.html#cudnnSetConvolutionGroupCount)
+/// # Safety
+/// `desc` must NOT have been freed already
+pub unsafe fn set_convolution_group_count(
+    desc: sys::cudnnConvolutionDescriptor_t,
+    group_count: i32,
+) -> Result<(), CudnnError> {
+    sys::cudnnSetConvolutionGroupCount(desc, group_count).result()
+}
+
 /// Destroys a descriptor. See [nvidia docs](https://docs.nvidia.com/deeplearning/cudnn/api/index.html#cudnnDestroyConvolutionDescriptor).
 /// # Safety
 /// `desc` must NOT have been already freed.

src/cudnn/safe/conv.rs

@@ -95,6 +95,12 @@ impl<T> Conv2dDescriptor<T> {
     pub fn set_math_type(&mut self, math_type: sys::cudnnMathType_t) -> Result<(), CudnnError> {
         unsafe { result::set_convolution_math_type(self.desc, math_type) }
     }
+
+    /// Set's the group count for this convolution. Refer to [nvidia docs](https://docs.nvidia.com/deeplearning/cudnn/api/index.html#cudnnSetConvolutionGroupCount)
+    /// for more information.
+    pub fn set_group_count(&mut self, group_count: i32) -> Result<(), CudnnError> {
+        unsafe { result::set_convolution_group_count(self.desc, group_count) }
+    }
 }
 
 impl<T> Drop for Conv2dDescriptor<T> {