Texas Instruments TMS320C28x, Reference Manual

Page: 318 / 695

MOV AX, loc16
6-161
MOV AX, loc16 Load AX
SYNTAX OPTIONS OPCODE OBJMODE RPT CYC
MOV AX, loc16
1001 001A LLLL LLLL
X − 1
Operands AX Accumulator high (AH) or accumulator low (AL) register
loc16 Addressing mode (see Chapter 5)
Description Load accumulator high register (AH) or accumulator low register (AL)
register with the 16-bit contents of the location pointed to by the “loc16”
addressing mode, leaving the other half of the accumulator register
unchanged:
AX = [loc16];
Flags and
Modes
N The load to AX is tested for a negative condition. If bit 15 of AX is 1, then
this flag is set; otherwise it is cleared.
Z The load to AX is tested for a zero condition. The bit is set if the operation
results in AX = 0, otherwise it is cleared
Repeat This instruction is not repeatable. If this instruction follows the RPT
instruction, it resets the repeat counter (RPTC) and executes only once.
Example
MOV AH, *+XAR0[0] ; Load AH with the 16-bit contents
; of location pointed to by XAR0.
; AL is unchanged.
SB NotZero,NEQ ; Branch if contents of AH were non
; zero.