Sgl_right_align
Sgl_right_align(/*operand*/right,/*shifted by*/diff_exponent,
Sgl_right_align(result,/*by*/(1-result_exponent),extent);
Sgl_right_align(/*operand*/right,/*shifted by*/diff_exponent,
Sgl_right_align(result,/*by*/(1-result_exponent),extent);