こんな感じかな? 8086emulatorでいいんだよね?

# make_COM#
ORG 100h
Start:
MOV al, data
MOV ah, al
MOV bh, ah
MOV ch, bh
AND al, 1
SAR ah, 1
AND ah, 1
OR al, ah ; A+B

SAR bh, 2
AND bh, 1
mov al, bh ;(A+B)+C
SAR ch, 3
AND ch, 1
AND al, ch ;(A+B+C)*D
MOV bl, al
AND bl, 1

RET

DATAdb 00000111b