Author: Richard W. Baker, Iowa State University, Ames, Iowa

MUL-2REG provides the user with an integer multiply subroutine capable of multiplying the contents of 2 registers (each register may contain values up to +/-3777) resulting in a signed double register product. With the hardware integer multiply the product must not exceed the capacity of a single register. If overflow does occur the most significant high order bits are lost and the user will be unaware of this fact since the overflow indicator is not triggered by 'MUL.' MUL-2REG bypasses the above stringent restrictions and pitfalls of the hardware integer multiply.

Storage Requirement: 75 Octal Registers (61 Decimal)

Source Language: LAP6

Catalog: July 1974