Texas Instruments TMS320C28x, Reference Manual

Page: 327 / 695

MOV loc16, AX, COND
6-170
MOV loc16, AX, COND Store AX Register Conditionally
SYNTAX OPTIONS OPCODE OBJMODE RPT CYC
MOV loc16, AX, COND
0101 0110 0010 101A
0000 COND LLLL LLLL
1 − 1
Operands loc16 Addressing mode (see Chapter 5)
AX
Accumulator high (AH) or accumulator low (AL) register
COND Conditional codes:
COND Syntax Description Flags Tested
0000 NEQ Not Equal To Z = 0
0001 EQ Equal To Z = 1
0010 GT Greater Then Z = 0 AND N = 0
0011 GEQ Greater Then Or Equal To N = 0
0100 LT Less Then N = 1
0101 LEQ Less Then Or Equal To Z = 1 OR N = 1
0110 HI Higher C = 1 AND Z = 0
0111 HIS, C Higher Or Same, Carry Set C = 1
1000 LO, NC Lower, Carry Clear C = 0
1001 LOS Lower Or Same C = 0 OR Z = 1
1010 NOV No Overflow V = 0
1011 OV Overflow V = 1
1100 NTC Test Bit Not Set TC = 0
1101 TC Test Bit Set TC = 1
1110 NBIO BIO Input Equal To Zero BIO = 0
1111 UNC Unconditional −
Description If the specified condition being tested is true, then the location pointed to by the
“loc16” addressing mode will be loaded with the contents of the specified AX reg-
ister (AH or AL):
if(COND = true) [loc16] = AX;
Note: Addressing modes are not conditionally executed. Hence, if an addressing mode
performs a pre or post modification, the modification will occur, regardless of whether
the condition is true or not.
Flags and
Modes
N If (COND = true AND loc16 = @AX), AX is tested for a negative condition after
the move and if bit 15 of AX is 1, the negative flag bit is set.
Z If (COND = true AND loc16 = @AX), after the move, AX is tested for a zero
condition and the zero flag bit is set if AX = 0, otherwise, it is cleared.
V If the V flag is tested by the condition, then V 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.