OR ACC, loc16
6-257
OR ACC, loc16 Bitwise OR
SYNTAX OPTIONS OPCODE OBJMODE RPT CYC
OR ACC, loc16 1010 1111 LLLL LLLL 1 Y N+1
Operands ACC Accumulator register
loc16 Addressing mode (see Chapter 5)
Description Perform a bitwise OR operation on the ACC register with the zero-extended
content of the location pointed to by the “loc16” address mode. The result is
stored in the ACC register:
ACC = ACC OR 0:[loc16];
Flags and
Modes
N
The load to ACC is tested for a negative condition. If bit 31 of ACC is 1, then
the negative flag bit is set; otherwise it is cleared.
Z
The load to ACC is tested for a zero condition. The zero flag bit is set if the
operation generates ACC = 0; otherwise it is cleared
Repeat This operation is repeatable. If the operation follows a RPT instruction, then
the OR instruction will be executed N+1 times. The state of the Z and N flags
will reflect the final result.
Example
; Calculate the 32-bit value: VarA = VarA OR 0:VarB
MOVL ACC,@VarA ; Load ACC with contents of VarA
OR ACC,@VarB ; OR ACC with contents of 0:VarB
MOVL @VarA,ACC ; Store result in VarA
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