MainFunctionStart();
emit("\n");
emit("  ");
emit(shader_helper.GuardAgainstOutOfBoundsWorkgroupSizes("uniforms.output_size"));
emit(";\n");
emit("\n");
emit("  let constant_value =\n");
if (param["is_float16"]) {
emit("      bitcast<vec2<f16>>(uniforms.constant_value)[0];\n");
} else {
emit("      bitcast<output_value_t>(uniforms.constant_value);\n");
}
if (param["dim_value_zero"]) {
emit("  output[global_idx] = constant_value;\n");
} else {
emit("  let output_indices = ");
emit(variable["output"].OffsetToIndices("global_idx"));
emit(";\n");
emit("  var input_index = u32(0);\n");
emit("  var use_pad_value = false;\n");
emit("  var in_coord = i32(0);\n");
emit("\n");
emit("  for (var dim = 0; dim < ");
emit(variable["output"].Rank());
emit(" && !use_pad_value; dim++) {\n");
emit("    let output_index = i32(");
emit(GetElementAt("output_indices", "dim", variable["output"].Rank()));
emit(");\n");
emit("    let lower_pads = ");
emit(GetElementAt("uniforms.lower_pads", "dim", variable["output"].Rank()));
emit(";\n");
emit("    let data_shape = i32(");
emit(GetElementAt("uniforms.data_shape", "dim", variable["output"].Rank()));
emit(");\n");
if (param["pad_mode"] == 0) {
emit("    if (output_index < lower_pads || output_index >= data_shape + lower_pads) {\n");
emit("        use_pad_value = true;\n");
} else if (param["pad_mode"] == 1) {
emit("    if (output_index < lower_pads) {\n");
emit("      in_coord = 0;\n");
emit("    } else if (output_index >= data_shape + lower_pads) {\n");
emit("      in_coord = data_shape - 1;\n");
} else if (param["pad_mode"] == 2) {
emit("    if (output_index < lower_pads || output_index >= data_shape + lower_pads) {\n");
emit("      in_coord = output_index - lower_pads;\n");
emit("      if (in_coord < 0) {\n");
emit("        in_coord = -in_coord;\n");
emit("      }\n");
emit("      let _2n_1 = 2 * (data_shape - 1);\n");
emit("      in_coord = in_coord % _2n_1;\n");
emit("      if (in_coord >= data_shape) {\n");
emit("        in_coord = _2n_1 - in_coord;\n");
emit("      }\n");
} else {
emit("    if (output_index < lower_pads) {\n");
emit("      in_coord = data_shape + output_index - lower_pads;\n");
emit("    } else if (output_index >= data_shape + lower_pads) {\n");
emit("      in_coord = output_index - data_shape - lower_pads;\n");
}
emit("    } else {\n");
emit("        in_coord = output_index - lower_pads;\n");
emit("    }\n");
emit("\n");
emit("    input_index += select(u32(in_coord)\n");
if (variable["output"].Rank() > 1) {
emit("        * ");
emit(GetElementAt("uniforms.data_stride", "dim", variable["output"].Rank() - 1));
emit("\n");
}
emit("        , u32(in_coord), dim == ");
emit(variable["output"].Rank());
emit(" - 1);\n");
emit("  }\n");
emit("\n");
emit("  ");
emit(variable["output"].SetByOffset("global_idx", "select(data[input_index], constant_value, use_pad_value)"));
emit(";\n");
}
MainFunctionEnd();
emit("\n");