IP2022 User’s Manual—Instruction Set Architecture www.ubicom.com 217 SUB W,#lit8 Subtract W from Literal into W Operation: W = lit8 - W Bits affected: C, DC, Z Opcode: 0111 1010 kkkk kkkk Description: This instruction subtracts the contents of W from
an 8-bit literal and writes the 8-bit result into W.
The  register  contents  are  treated  as  unsigned
values. If the result of subtraction is negative (W is larger
than lit8), the C bit is cleared and the lower eight
bits of the result are written to W. Otherwise, the
C bit is set. If there is a borrow from bit 3 to bit 4, the DC (digit
carry) bit is cleared. Otherwise, the bit is set. If the result of subtraction is zero, the Z bit is set.
Otherwise, the bit is cleared. Cycles: 1