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S3C8245/P8245/C8249/P8249 INSTRUCTION SET
6-9
Table 6-4. Instruction Notation Conventions
Notation Description Actual Operand Range
cc Condition code See list of condition codes in Table 6-6.
r Working register only Rn (n = 0–15)
rb Bit (b) of working register Rn.b (n = 0–15, b = 0–7)
r0 Bit 0 (LSB) of working register Rn (n = 0–15)
rr Working register pair RRp (p = 0, 2, 4, ..., 14)
R Register or working register reg or Rn (reg = 0–255, n = 0–15)
Rb Bit 'b' of register or working register reg.b (reg = 0–255, b = 0–7)
RR Register pair or working register pair reg or RRp (reg = 0–254, even number only, where
p = 0, 2, ..., 14)
IA Indirect addressing mode addr (addr = 0–254, even number only)
Ir Indirect working register only @Rn (n = 0–15)
IR Indirect register or indirect working register @Rn or @reg (reg = 0–255, n = 0–15)
Irr Indirect working register pair only @RRp (p = 0, 2, ..., 14)
IRR Indirect register pair or indirect working
register pair
@RRp or @reg (reg = 0–254, even only, where
p = 0, 2, ..., 14)
X Indexed addressing mode #reg [Rn] (reg = 0–255, n = 0–15)
XS Indexed (short offset) addressing mode #addr [RRp] (addr = range –128 to +127, where
p = 0, 2, ..., 14)
xl Indexed (long offset) addressing mode #addr [RRp] (addr = range 0–65535, where
p = 0, 2, ..., 14)
da Direct addressing mode addr (addr = range 0–65535)
ra Relative addressing mode addr (addr = number in the range +127 to –128 that is
an offset relative to the address of the next instruction)
im Immediate addressing mode #data (data = 0–255)
iml Immediate (long) addressing mode #data (data = range 0–65535)