12.6

12.6.txt

// X = (A + B * C)/(D - E * F)

// three-address code
MPY     Y, B, C
ADD     Y, Y, A

MPY     Z, E, F
SUB     Z, D, Z

DIV     X, Y, Z

// two-address code
MOVE    X, B
MPY     X, C
ADD     X, A

MOVE    T, E
MPY     T, F
MOVE    Y, D
SUB     Y, T

DIV     X, Y

// one-address code
LOAD    B
MPY     C
ADD     A
STOR    X

LOAD    E
MPY     F
STOR    Y

LOAD    D
SUB     Y
STOR    Y

LOAD    X
DIV     Y
STOR    X

// zero-address code
PUSH    F
PUSH    E
MPY
PUSH    D
SUB

PUSH    C
PUSH    B
MPY
PUSH    A
ADD

DIV

POP     X