WORM Solution
SCALE PAIR
WORM row 10
Prerequisites
Unlocks
w51 solved
Active cores0, 1, 2, 3, 6, 7
Program lines15
DetailWORM row 10
Walkthrough
SCALE PAIR: OUT = A * B (true variable times variable, signed).
A feeds core 0 (UP, stream 0); B feeds core 1 (UP, stream 1).
core 1 forwards B LEFT into core 0's RIGHT. core 0 loads A, multiplies by the
live B with one MUL (a repeated-add loop would have to sign-handle both
operands and iterate up to 31 times; MUL is the natural one-cycle tool), then
sends the product DOWN the left column: core 0 -> core 3 -> core 6 (output 0).
Rack Solution
# SCALE PAIR: OUT = A * B (true variable times variable, signed).
# A feeds core 0 (UP, stream 0); B feeds core 1 (UP, stream 1).
# core 1 forwards B LEFT into core 0's RIGHT. core 0 loads A, multiplies by the
# live B with one MUL (a repeated-add loop would have to sign-handle both
# operands and iterate up to 31 times; MUL is the natural one-cycle tool), then
# sends the product DOWN the left column: core 0 -> core 3 -> core 6 (output 0).
@0
MOV ACC, UP
MUL RIGHT
MOV DOWN, ACC
@1
MOV ACC, RIGHT
MOV LEFT, ACC
@3
MOV DOWN, UP
@6
MOV RIGHT, UP
@2
MOV LEFT, UP
@7
MOV DOWN, LEFT