Texas Instruments TMS320C28x Reference Manual page 355

MOVB loc16, AX.MSB
MOVB loc16, AX.MSB
SYNTAX OPTIONS
MOVB loc16, AX.MSB
Operands loc16
AX.MS
B
Description
Flags and N
Modes
Z
6-198
1100 100A LLLL LLLL
Addressing mode (see Chapter 5)
Most significant byte of accumulator high (AH.MSB) or accumulator low
(AL.MSB) register
Load 8 bits of the location pointed to by the "loc16" addressing mode with the
most significant byte of the specified AX register (AH.MSB or AL.MSB). The
form of the "loc16" operand determines which of its 8 bits are loaded and
which of its 8 bits are left unchanged:
if(loc16 = *+XARn[offset])
{
if( offset is an even number )
[loc16.LSB] = AX.MSB;
[loc16.MSB] = unchanged;
if( offset is an odd number )
[loc16.LSB] = unchanged;
[loc16.MSB] = AX.MSB;
}
else
[loc16.LSB] = AX.MSB;
[loc16.MSB] = unchanged;
Note: offset = 3-bit immediate or AR0 or AR1 indexed addressing modes only.
This is a read-modify-write operation.
For the following address modes, the returned result is undefined:
*AR6%++
*0++
*0−−
*BR0++
*BR0−−
*0++, ARPn
*0−−, ARPn
*BR0++, ARPn
*BR0−−, ARPn
If (loc16 = @AX), then after the move AX is tested for a negative condition.
The negative flag bit is set if bit 15 of AX is 1, otherwise it is cleared.
If (loc16 = @AX), then after the move, AX is tested for a zero condition. The
zero flag bit is set if AX = 0, otherwise it is cleared.
Store MSB of AX Register
OPCODE OBJMODE
(AMODE = 0)
(AMODE = x)
(AMODE = x)
(AMODE = x)
(AMODE = x)
(AMODE = 1)
(AMODE = 1)
(AMODE = 1)
(AMODE = 1)
RPT CYC
X − 1