Function _Pad

express/NeuralNetWorkOp.cpp:739–759

Pads a variable. Args: x: A variable. paddings: A variable of type Halide_Type_Int. The shape is [n, 2] where n is the rank of variable. mode: A enum, One of PadValueMode_CONSTANT, PadValueMode_SYMMETRIC, or PadValueMode_REFLECT. Returns: A variable. Has the same type as x. */

A variable. Has the same type as x.
*/
VARP _Pad(VARP x, VARP paddings, PadValueMode mode) {
    std::unique_ptr<OpT> pad(new OpT);
    pad->type       = OpType_Padding;
    pad->main.type  = OpParameter_PadParam;
    pad->main.value = new PadParamT;
    switch (mode) {
        case CONSTANT:
            pad->main.AsPadParam()->mode = MNN::PadValueMode_CONSTANT;
            break;
        case SYMMETRIC:
            pad->main.AsPadParam()->mode = MNN::PadValueMode_SYMMETRIC;
            break;
        case REFLECT:
            pad->main.AsPadParam()->mode = MNN::PadValueMode_REFLECT;
            break;
        default:
            pad->main.AsPadParam()->mode = MNN::PadValueMode_CONSTANT;
            break;
    }
    return (Variable::create(Expr::create(std::move(pad), {x, paddings})));
}
/*Returns a variable with an additional dimension inserted at index axis.
Args:
input: A variable.