Adding upsample_nearest_2d.

candle-metal-kernels/src/lib.rs

@@ -1518,6 +1518,50 @@ pub fn call_im2col_strided(
     Ok(())
 }
 
+#[allow(clippy::too_many_arguments)]
+pub fn call_upsample_nearest_2d(
+    device: &Device,
+    command_buffer: &CommandBufferRef,
+    kernels: &Kernels,
+    name: &'static str,
+    shape: &[usize],
+    strides: &[usize],
+    out_w: usize,
+    out_h: usize,
+    input: &Buffer,
+    input_offset: usize,
+    output: &Buffer,
+) -> Result<(), MetalKernelError> {
+    let pipeline = kernels.load_pipeline(device, Source::Conv, name)?;
+    let dst_el = out_w * out_h * shape[0] * shape[1];
+    let scale_w = shape[2] as f32 / out_w as f32;
+    let scale_h = shape[3] as f32 / out_h as f32;
+    let (thread_group_count, thread_group_size) = linear_split(&pipeline, dst_el);
+    let encoder = command_buffer.new_compute_command_encoder();
+    encoder.wait_for_fence(&kernels.fence);
+    encoder.set_compute_pipeline_state(&pipeline);
+    set_params!(
+        encoder,
+        (
+            out_w,
+            out_h,
+            scale_w,
+            scale_h,
+            shape,
+            strides,
+            (input, input_offset),
+            output
+        )
+    );
+    encoder.use_resource(input, metal::MTLResourceUsage::Read);
+    encoder.use_resource(output, metal::MTLResourceUsage::Write);
+    encoder.dispatch_thread_groups(thread_group_count, thread_group_size);
+    encoder.update_fence(&kernels.fence);
+    encoder.end_encoding();
+
+    Ok(())
+}
+
 fn divide(m: usize, b: usize) -> NSUInteger {
     ((m + b - 1) / b) as NSUInteger
 }