SUBWF

Subtract W from f

Subtract (2’s complement method) W register from register ‘f’. If ‘d’ is ‘0’, the result is stored in the W register. If ‘d’ is ‘1’, the result is stored back in register ‘f’.

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Syntax:

[ label ] SUBWF f,d

Operation:

(f) – (W) → (destination)

Operands:

  • f is from 0 to 127
  • d is either 0 or 1

Status Affected: C, DC, Z

Example:

Before instruction:
After instruction:
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Example:

Before instruction:
After instruction: