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2.5.7
System Control Instructions
Table 2.10 describes the system control instructions. Figure 2.9 shows their object code formats.
Table 2.10 System Control Instructions
Instruction
Size*
RTE
—
SLEEP
—
LDC
B
STC
B
ANDC
B
ORC
B
XORC
B
NOP
—
Notes: *
Size: Operand size
B:
Byte
Function
Returns from an exception-handling routine
Causes a transition from active mode to a power-down mode. See
section 5, Power-Down Modes, for details.
Rs → CCR, #IMM → CCR
Moves immediate data or general register contents to the condition
code register
CCR → Rd
Copies the condition code register to a specified general register
CCR ∧ #IMM → CCR
Logically ANDs the condition code register with immediate data
CCR ∨ #IMM → CCR
Logically ORs the condition code register with immediate data
CCR ⊕ #IMM → CCR
Logically exclusive-ORs the condition code register with immediate
data
PC + 2 → PC
Only increments the program counter
39
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