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SUB (Super FX): Difference between revisions

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(blurb about specifying sreg/dreg in advance)
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SUB #n
SUB #n
</pre>
</pre>
==== Example 1 ====
Let:
S<sub>reg</sub> : R<sub>5</sub>
D<sub>reg</sub> : R<sub>4</sub>
R<sub>5</sub> = 735ah
R<sub>8</sub> = 426bh
After executing SUB R<sub>8</sub>:
R<sub>4</sub> = 30efh


=== See Also ===
=== See Also ===

Revision as of 23:26, 9 July 2024

Basic Info
Addressing Mode Opcode Length ROM Speed RAM Speed Cache Speed
Implied (type 1) 6n 1 byte 3 cycles 3 cycles 1 cycle
Immediate 3E6n 2 bytes 6 cycles 6 cycles 2 cycle
Flags Affected
B ALT1 ALT2 O/V S CY Z
0 0 0

SUB is a Super FX instruction that performs a subtraction between the source register and an operand. The difference is stored in the destination register. The subtrahend may be any register from R0 to R15 or any immediate value from 0 to 15. The source register is the minuend.

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

Syntax

SUB Rn
SUB #n

Example 1

Let:

Sreg : R5
Dreg : R4
R5 = 735ah
R8 = 426bh

After executing SUB R8:

R4 = 30efh

See Also

External Links