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ROL (Super FX)

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Basic Info
Addressing Mode Opcode Length ROM Speed RAM Speed Cache Speed
Implied (type 1) 04 1 byte 3 cycles 3 cycles 1 cycle
Flags Affected
B ALT1 ALT2 O/V S CY Z
0 0 0 . S CY Z

ROL (Rotate Left) is a Super FX instruction that rotates the value of the source register and carry flag one bit to the left into the destination register. A total of 17 bits participate in the rotation.

The ALT0 state is restored.

The source and destination registers should be specified in advance using WITH, FROM, or TO. Otherwise, R0 serves as the default.

Syntax

ROL

Example

Let:

Sreg : R8
Dreg : R4
R8 = 1d4bh (0001 1101 0100 1011b)
CY = 1

After executing ROL:

R4 = 3a97h (0011 1010 1001 0111b)
CY = 0

gsu rol.png

The source register itself is not modified despite the arrows in the above image.

See Also

External Links