Chapter 9 XGATE (S12XGATEV2)
MC9S12XDP512 Data Sheet, Rev. 2.11
Freescale Semiconductor 409
Operation
RD + IMM8:$00RD
Adds the content of high byte of register RD and a signed immediate 8-Bit constant using binary addition
and stores the result in the high byte of the destination register RD. This instruction can be used after an
ADDL for a 16-bit immediate addition.
Example:
ADDL R2,#LOWBYTE
ADDH R2,#HIGHBYTE ; R2 = R2 + 16 Bit immediate
CCR Effects
Code and CPU Cycles
ADDH Add Immediate 8-Bit Constant
(High Byte) ADDH
NZVC
∆∆∆∆
N: Set if bit 15 of the result is set; cleared otherwise.
Z: Set if the result is $0000; cleared otherwise.
V: Set if a two´s complement overflow resulted from the operation; cleared otherwise.
RD[15]old & IMM8[7] & RD[15]new | RD[15]old & IMM8[7] & RD[15]new
C: Set if there is a carry from the bit 15 of the result; cleared otherwise.
RD[15]old & IMM8[7] | RD[15]old & RD[15]new | IMM8[7] & RD[15]new
Source Form Address
Mode Machine Code Cycles
ADDH RD, #IMM8 IMM8 1 1 1 0 1 RD IMM8 P