diff --git a/mlir/lib/Conversion/GPUToROCDL/LowerGpuOpsToROCDLOps.cpp b/mlir/lib/Conversion/GPUToROCDL/LowerGpuOpsToROCDLOps.cpp
--- a/mlir/lib/Conversion/GPUToROCDL/LowerGpuOpsToROCDLOps.cpp
+++ b/mlir/lib/Conversion/GPUToROCDL/LowerGpuOpsToROCDLOps.cpp
@@ -105,6 +105,10 @@
       GPUFuncOpLowering<5>, GPUReturnOpLowering>(converter);
   patterns.insert<OpToFuncCallLowering<AbsFOp>>(converter, "__ocml_fabs_f32",
                                                 "__ocml_fabs_f64");
+  patterns.insert<OpToFuncCallLowering<AtanOp>>(converter, "__ocml_atan_f32",
+                                                "__ocml_atan_f64");
+  patterns.insert<OpToFuncCallLowering<Atan2Op>>(converter, "__ocml_atan2_f32",
+                                                 "__ocml_atan2_f64");
   patterns.insert<OpToFuncCallLowering<CeilFOp>>(converter, "__ocml_ceil_f32",
                                                  "__ocml_ceil_f64");
   patterns.insert<OpToFuncCallLowering<CosOp>>(converter, "__ocml_cos_f32",
diff --git a/mlir/test/Conversion/GPUToROCDL/gpu-to-rocdl.mlir b/mlir/test/Conversion/GPUToROCDL/gpu-to-rocdl.mlir
--- a/mlir/test/Conversion/GPUToROCDL/gpu-to-rocdl.mlir
+++ b/mlir/test/Conversion/GPUToROCDL/gpu-to-rocdl.mlir
@@ -280,3 +280,33 @@
     std.return %result32, %result64 : f32, f64
   }
 }
+
+// -----
+
+gpu.module @test_module {
+  // CHECK: llvm.func @__ocml_atan_f32(!llvm.float) -> !llvm.float
+  // CHECK: llvm.func @__ocml_atan_f64(!llvm.double) -> !llvm.double
+  // CHECK-LABEL: func @gpu_atan
+  func @gpu_atan(%arg_f32 : f32, %arg_f64 : f64) -> (f32, f64) {
+    %result32 = std.atan %arg_f32 : f32
+    // CHECK: llvm.call @__ocml_atan_f32(%{{.*}}) : (!llvm.float) -> !llvm.float
+    %result64 = std.atan %arg_f64 : f64
+    // CHECK: llvm.call @__ocml_atan_f64(%{{.*}}) : (!llvm.double) -> !llvm.double
+    std.return %result32, %result64 : f32, f64
+  }
+}
+
+// -----
+
+gpu.module @test_module {
+  // CHECK: llvm.func @__ocml_atan2_f32(!llvm.float, !llvm.float) -> !llvm.float
+  // CHECK: llvm.func @__ocml_atan2_f64(!llvm.double, !llvm.double) -> !llvm.double
+  // CHECK-LABEL: func @gpu_atan2
+  func @gpu_atan2(%arg_f32 : f32, %arg_f64 : f64) -> (f32, f64) {
+    %result32 = std.atan2 %arg_f32, %arg_f32 : f32
+    // CHECK: llvm.call @__ocml_atan2_f32(%{{.*}}) : (!llvm.float, !llvm.float) -> !llvm.float
+    %result64 = std.atan2 %arg_f64, %arg_f64 : f64
+    // CHECK: llvm.call @__ocml_atan2_f64(%{{.*}}) : (!llvm.double, !llvm.double) -> !llvm.double
+    std.return %result32, %result64 : f32, f64
+  }
+}