Chapter 9 XGATE (S12XGATEV2)
MC9S12XDP512 Data Sheet, Rev. 2.11
456 Freescale Semiconductor
Operation
–RSRD (translates to SUB RD, R0, RS)
–RD RD (translates to SUB RD, R0, RD)
Performs a two’s complement on a general purpose register.
CCR Effects
Code and CPU Cycles
NEG Two’s Complement NEG
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.
RS[15] & RD[15]new
C: Set if there is a carry from the bit 15 of the result; cleared otherwise
RS[15] | RD[15]new
Source Form Address
Mode Machine Code Cycles
NEG RD, RS TRI 0 0 0 1 1 RD 0 0 0 RS 0 0 P
NEG RD TRI 0 0 0 1 1 RD 0 0 0 RD 0 0 P