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MICROPROCESSOR INSTRUCTION REFERENCE->EXT

EXT    Sign Extend
EXTB

Compatibility: 68000, 68010, 68020 and CPU32 families.


Sign Extended Destination -> Destination

Assembler Syntax:	EXT.W Dn	extend byte to word
	EXT.L Dn	extend word to long word
	1 EXTB.L Dn	extend byte to long word

1   68020 and CPU32 only

Size:    Word, Long

Extends a byte in a data register to a word or a long word, or a word in a data register to a long word, by replicating the sign bit to the left.

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