Difference between revisions of "PM Opc SHL"
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(→SHL = Shift Left) |
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|12 | |12 | ||
|- | |- | ||
| − | |CE 86 | + | |CE 86 nn |
|SHL [N+#nn] | |SHL [N+#nn] | ||
|20 | |20 | ||
| Line 44: | Line 44: | ||
=== Conditions === | === Conditions === | ||
| − | Zero: Set when result is 0 | + | Zero: Set when result is 0 |
| − | Carry: Set when the old bit 7 was 1 | + | Carry: Set when the old bit 7 was 1 |
| − | Sign: Set when bit 7 of the result is 1 | + | Sign: Set when bit 7 of the result is 1 |
| − | Overflow remain unchanged | + | Overflow remain unchanged |
=== Examples === | === Examples === | ||
| − | ; A = 0x04 | + | ; A = 0x04 (4) |
| − | SHL A | + | '''SHL A''' |
| − | ; A = 0x08 | + | ; A = 0x08 (8) |
| − | ; F = (Zero = 0):(Carry=0):(Sign=0) | + | ; F = (Zero=0):(Carry=0):(Sign=0) |
| − | ; B = 0x45 | + | ; B = 0x45 (69) |
| − | SHL B | + | '''SHL B''' |
| − | ; B = 0x8A | + | ; B = 0x8A (138) |
| − | ; F = (Zero = 0):(Carry=0):(Sign=1) | + | ; F = (Zero=0):(Carry=0):(Sign=1) |
| − | ; B = 0x84 | + | ; B = 0x84 (138) |
| − | SHL B | + | '''SHL B''' |
| − | ; B = 0x14 | + | ; B = 0x14 (20) |
| − | ; F = (Zero = 0):(Carry=1):(Sign=0) | + | ; F = (Zero=0):(Carry=1):(Sign=0) |
| − | ; [HL] = 0x80 | + | ; [HL] = 0x80 (128) |
| − | SHL [HL] | + | '''SHL [HL]''' |
| − | ; [HL] = 0x00 | + | ; [HL] = 0x00 (0) |
| − | ; F = (Zero = 1):(Carry=1):(Sign=0) | + | ; F = (Zero=1):(Carry=1):(Sign=0) |
[[PM_InstructionList|'''« Back to Instruction set''']] | [[PM_InstructionList|'''« Back to Instruction set''']] | ||
Latest revision as of 12:50, 27 March 2010
SHL = Shift Left
| Hex | Mnemonic | Cycles |
|---|---|---|
| CE 84 | SHL A | 12 |
| CE 85 | SHL B | 12 |
| CE 86 nn | SHL [N+#nn] | 20 |
| CE 87 | SHL [HL] | 16 |
Execute
A = Register A B = Register B [N+#nn] = Memory: (I shl 16) or (N shl 8) or #nn [HL] = Memory: (I shl 16) or HL
; SHL Ds ; ; Ds = Source/Destination Ds = Ds SHL 1
Description
"8-Bits Destination" bits are shifted left by 1.
NOTE: This instruction can be used as an unsigned integer multiplication by 2.
Conditions
Zero: Set when result is 0
Carry: Set when the old bit 7 was 1
Sign: Set when bit 7 of the result is 1
Overflow remain unchanged
Examples
; A = 0x04 (4) SHL A ; A = 0x08 (8) ; F = (Zero=0):(Carry=0):(Sign=0)
; B = 0x45 (69) SHL B ; B = 0x8A (138) ; F = (Zero=0):(Carry=0):(Sign=1)
; B = 0x84 (138) SHL B ; B = 0x14 (20) ; F = (Zero=0):(Carry=1):(Sign=0)
; [HL] = 0x80 (128) SHL [HL] ; [HL] = 0x00 (0) ; F = (Zero=1):(Carry=1):(Sign=0)
