((kField_Extract_(REG_VAL_A, MASK, SHIFT) - kField_Extract_(REG_VAL_B, MASK, SHIFT)) \

& ((MASK) >> (SHIFT)))

Takes the difference between register fields at the same location within two register values.

Parameters

REG_VAL_A	Register value A.
REG_VAL_B	Register value B.
MASK	Mask value (applied before shift).
SHIFT	Shift value (applied after mask).