Convert Word to Extended DoubleWord
|
86/88 |
N |
186 |
N |
286 |
N |
386 |
Y |
486 |
Y |
CWDE |
|
Ovfl |
N |
Dir |
N |
Int |
N |
Trap |
N |
Sign |
N |
Zero |
N |
Aux |
N |
Prty |
N |
Carry |
N |
Converts a signed word in AX to a signed DoubleWord in EAX by
extending the sign bit of AX throughout EAX.
------------------------------------ Timing ----------------------------------
OpCode Instruction 386 286 86
98 CWDE 3
------------------------------------ Logic -----------------------------------
If (AX < 8000h) then
hi(EAX) = 0
else
hi(EAX) = 0FFFFh
See Also CWD CBW CDQ DIV IDIV |