We've just updated MediaWiki and its underlying software. If anything doesn't look or work quite right, please mention it to us. --RanAS
ASL (SPC700): Difference between revisions
From SnesLab
(added image) |
(every bit) |
||
| Line 50: | Line 50: | ||
|} | |} | ||
'''ASL''' (Arithmetic Shift Left) is an [[SPC700]] instruction that shifts its operand one bit to the left, more or less multiplying it by two. A zero is shifted into the least significant bit. The most significant bit is shifted into the [[carry flag]]. | '''ASL''' (Arithmetic Shift Left) is an [[SPC700]] instruction that shifts every bit of its operand one bit to the left, more or less multiplying it by two. A zero is shifted into the least significant bit. The most significant bit is shifted into the [[carry flag]]. | ||
==== Syntax ==== | ==== Syntax ==== | ||
Revision as of 11:03, 23 July 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Accumulator | 1C | 1 byte | 2 cycles | ||||
| Direct Page | 0B | 2 bytes | 4 cycles | ||||
| Direct Page Indexed by X | 1B | 2 bytes | 5 cycles | ||||
| Absolute | 0C | 3 bytes | 5 cycles | ||||
| Flags Affected | |||||||
|---|---|---|---|---|---|---|---|
| N | V | P | B | H | I | Z | C |
| . | . | . | . | . | |||
ASL (Arithmetic Shift Left) is an SPC700 instruction that shifts every bit of its operand one bit to the left, more or less multiplying it by two. A zero is shifted into the least significant bit. The most significant bit is shifted into the carry flag.
Syntax
ASL A ASL dp ASL dp+x ASL !abs
See Also
External Links
- Official Super Nintendo development manual on ASL: Appendix C-7 of Book I
- anomie: https://github.com/yupferris/TasmShiz/blob/master/spc700.txt#L335