Texas Instruments TMS320C28x User Manual

FLIP AX
6-96
FLIP AX Flip Order of Bits in AX Register
SYNTAX OPTIONS OPCODE OBJMODE RPT CYC
FLIP AX 0101 0110 0111 000A 1 − 1
Operands
AX
Accumulator high (AH) or accumulator low (AL) register
Description Bit reverse the contents of the specified AX register (AH or AL):
temp = AX;
AX(bit 0) = temp(bit 15);
AX(bit 1) = temp(bit 14);
.
.
AX(bit 14) = temp(bit 1);
AX(bit 15) = temp(bit 0);
Flags and
Modes
N
After the operation, if bit 15 of AX is 1 then the negative flag bit is set; other-
wise it is cleared.
Z
After the operation, if AX is 0, then the Z bit is set, 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
; Flip the contents of 32-bit variable VarA:
MOV AH,@VarA+0 ; Load AH with low 16 bits of VarA
MOV AL,@VarA+1 ; Load AL with high 16 bits of VarA
FLIP AL ; Flip contents of AL
FLIP AH ; Flip contents of AH
MOVL @VarA,ACC ; Store 32-bit result in VarA

Texas Instruments TMS320C28x Specifications

General

Brand	Texas Instruments
Model	TMS320C28x
Category	Processor
Language	English