Texas Instruments TMS320C28x Reference Manual page 184

ADD AX, loc16
SYNTAX OPTIONS
ADD AX, loc16
Operands AX
loc16
Description
Flags and
N
Modes
Z
C
V
Repeat
Example
; Add the contents of VarA with VarB and store in VarC
MOV AL,@VarA
ADD AL,@VarB
MOV @VarC,AL
Accumulator high (AH) or accumulator low (AL) register
Addressing mode (see Chapter 5)
Add the contents of the location pointed to by the "loc16" addressing mode to
the specified AX register (AH or AL) and store the result in the AX register:
AX = AX + [loc16];
After the addition, AX is tested for a negative condition. If bit 15 of AX is 1, then
the negative flag bit is set, otherwise it is cleared.
After the addition, AX is tested for a zero condition. The zero flag bit is set if the
operation results in AX = 0; otherwise it is cleared.
If the addition generates a carry, C is set; otherwise, C is cleared.
If an overflow occurs, V is set; otherwise V is not affected. Signed positive
overflow occurs if the result crosses the max positive value (0x7FFF) in the
positive direction. Signed negative overflow occurs if the result crosses the
max negative value (0x8000) in the negative direction.
This instruction is not repeatable. If this instruction follows the RPT
instruction, it resets the repeat counter (RPTC) and executes only once.
OPCODE
1001 010A LLLL LLLL
; Load AL with contents of VarA
; Add to AL contents of VarB
; Store result in VarC
ADD AX, loc16
Add Value to AX
OBJMODE RPT CYC
X − 1
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