Maths (Arithmetic): SQUA

       Name: SQUA                                                    [Show more]
       Type: Subroutine
   Category: Maths (Arithmetic)
    Summary: Clear bit 7 of A and calculate (A P) = A * A
    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * NORM calls SQUA


 Do the following multiplication of unsigned 8-bit numbers, after first
 clearing bit 7 of A:

   (A P) = A * A


.SQUA

 AND #%01111111         \ Clear bit 7 of A and fall through into SQUA2 to set
                        \ (A P) = A * A