/* Given upstream grad U and a mul op A*B, the gradients are:
     *
     *    dA = U * B
     *    dB = A * U
     *
     */

    AbstractTensorHandle* upstream_grad = grad_outputs[0];

    // Gradient for A
    std::string name = "Mul_Grad_A";
    TF_RETURN_IF_ERROR(Mul(ctx, upstream_grad, forward_inputs_[1],

  AbstractTensorHandle* expand_dims_outputs;
  TF_RETURN_IF_ERROR(
      ops::ExpandDims(ctx, vec, dim.get(), &expand_dims_outputs, "ExpandDims"));
  TF_RETURN_IF_ERROR(
      ops::Mul(ctx, expand_dims_outputs, mat, &outputs[0], "Mul"));
  expand_dims_outputs->Unref();
  return absl::OkStatus();
}

class SparseSoftmaxCrossEntropyWithLogitsGradientFunction
    : public GradientFunction {
 public:

          command: [
            "/bin/sh",
            "-ce",

		FieldD string `gorm:"uniqueIndex;index"` // uniqueIndex and index

		FieldE1 string `gorm:"uniqueIndex:uniq_field_e1_e2"` // mul uniqueIndex
		FieldE2 string `gorm:"uniqueIndex:uniq_field_e1_e2"`

		FieldF1 string `gorm:"uniqueIndex:uniq_field_f1_f2;index"` // mul uniqueIndex and index
		FieldF2 string `gorm:"uniqueIndex:uniq_field_f1_f2;"`

		FieldG string `gorm:"unique;uniqueIndex"` // unique and uniqueIndex

	// In some db (e.g. MySQL), Unique and UniqueIndex are indistinguishable.
	// When a column has a (not Mul) UniqueIndex, Migrator always reports its gorm.ColumnType is Unique.
	// It causes field unnecessarily migration.
	// Therefore, we need to record the UniqueIndex on this column (exclude Mul UniqueIndex) for MigrateColumnUnique.
	UniqueIndex string
}

func (field *Field) BindName() string {

	MULALU		R1, R2, (R4, R3)     // 9231a4e0
	MULALU.S	R1, R2, (R4, R3)     // 9231b4e0

// MUL
	MUL	R2, R3, R4           // 930204e0
	MUL	R2, R4               // 940204e0
	MUL	R2, R4, R4           // 940204e0
	MUL.S	R2, R3, R4           // 930214e0
	MUL.S	R2, R4               // 940214e0
	MUL.S	R2, R4, R4           // 940214e0
	MULU	R5, R6, R7           // 960507e0
	MULU	R5, R7               // 970507e0

	// 5.3: Load and Store Instructions (RV64I)
	LD	(X5), X6				// 03b30200
	LD	4(X5), X6				// 03b34200
	SD	X5, (X6)				// 23305300
	SD	X5, 4(X6)				// 23325300

	// 7.1: Multiplication Operations
	MUL	X5, X6, X7				// b3035302
	MULH	X5, X6, X7				// b3135302
	MULHU	X5, X6, X7				// b3335302
	MULHSU	X5, X6, X7				// b3235302
	MULW	X5, X6, X7				// bb035302
	DIV	X5, X6, X7				// b3435302

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