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MICROPROCESSOR INSTRUCTION REFERENCE->MULS

MULS           Signed Multiply

Destination x Source -> Destination

    
Assembler Syntax:MULS.W <ea>,Dn16 x 16 -> 32
MULS.L <ea>,Dn 32 x 32 -> 32

Size:  Word, Long

Multiplies two signed operands yielding a signed results.  In the word form, the multiplier and multiplicand are both word operands, and the result is a long-word operand.  A register operand is the low-order word; the upper word of the register is ignored.  All 32 bits of the product are saved in the destination data register.  

In the long form, the multiplier and multiplicand are both long-word operands, and the result is a long word.

Condition Codes:

N    Set if result negative, else cleared
Z    Set if result zero, else cleared
V    Always cleared
C    Always cleared
X    Not affected

    
Allowable Addressing Modes
    
WordLong
    
Dn,DnDn,Dn
(An),Dn(An),Dn
(An)+,Dn(An)+,Dn
-(An),Dn-(An),Dn
(d16,An),Dn(d16,An),Dn
(d8,An,Xn),Dn
(xxx).W,Dn
(xxx).L,Dn
#(data),Dn
(d16,PC),Dn
(d8,PC,Xn),Dn