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5-19-10 DOUBLE BCD MULTIPLY – MULL(56)
Md: First multiplicand word (BCD)
IR, SR, AR, DM, HR, TC, LR
Mr: First multiplier word (BCD)
IR, SR, AR, DM, HR, TC, LR
Ladder Symbols
Operand Data Areas
R: First result word
IR, SR, AR, DM, HR LR
MULL(56)
Md
Mr
R
@MULL(56)
Md
Mr
R
Limitations Md and Md+1 must be in the same data area, as must Mr and Mr+1.
R and R+3 must be in the same data area.
Description When the execution condition is OFF, MULL(56) is not executed. When the exe-
cution condition is ON, MULL(56) multiplies the eight-digit content of Md and
Md+1 by the content of Mr and Mr+1, and places the result in R to R+3.
Md + 1 Md
Mr + 1 Mr
R + 1 RR + 3 R + 2
x
Flags ER: Md, Md+1,Mr, or Mr+1 is not BCD.
Indirectly addressed DM word is non-existent. (Content of ∗DM word is
not BCD, or the DM area boundary has been exceeded.)
CY: ON when there is a carry in the result.
EQ: ON when the result is 0.
5-19-11 BCD DIVIDE – DIV(33)
Dd: Dividend word (BCD)
IR, SR, AR, DM, HR, TC, LR, #
Ladder Symbol
Dr: Divisor word (BCD)
IR, SR, AR, DM, HR, TC, LR, #
Operand Data Areas
DIV(33)
Dd
Dr
R
R: First result word (BCD)
IR, SR, AR, DM, HR, LR
Limitations R and R+1 must be in the same data area.
BCD Calculations Section 5-19