This is a presentation I gave at Istanbul Tech Talks about my work writing Swift in production. It discusses why we need Swift, some problems I've faced using it, and how it enables new problem-solving techniques.
Y with zero - will hold result LOOP1 LDAA TEMP ;load A into TEMP ANDA MASK ;AND A with Mask BNE ADD1 BRA NONE1 ADD1 INY ;increment our counter of 1's NONE1 LDAA TEMP ;reload accumulator A LSL MASK ;Shift the mask's 1 bit left BNE LOOP1 ;If we haven't finished our loop, branch LDAA #$01 ;load new mask into A STAA MASK ;store the reset mask into MASK TSX ;pull of return address and store in X PULA ;pull off A STAA TEMP ;store the value into temp TXS ;push return address back onto the stack LOOP2 LDAA TEMP ;Load A into TEMP ANDA MASK ;logical AND MASK with A BNE ADD2 ;add one if we need to BRA NONE2 ADD2 INY ;increment our counter of 1's NONE2 LDAA TEMP LSL MASK ;shift our mask left by one BNE LOOP2 ;loop back until we've exhausted positions STY TEMP ;store Y into TEMP - this is the number of 1's LDAB TEMP ;load the number of 1's into B LDAA #$10 ;load dec 16 into A SBA ;A - B -> A same as 16 - B -> A
// Executed for any section 0, row is row case (let section, 0) where section % 2 == 1: // Executed for first rows of odd all sections case (let section, let row) where validate(section): // Executed when validate() returns true default: // Executed on all other cases }