USADA8
Unsigned Sum of Absolute Differences and Accumulate.
Syntax
USADA8{condRdRnRmRa
where:
condis an optional condition code.
Rdis the destination register.
Rnis the register holding the first operand.
Rmis the register holding the second operand.
Rais the register holding the accumulate operand.
Operation
The USADA8 instruction adds the
absolute values of the four differences to the value in RaRd
Register restrictions
You cannot use PC for any operand.
You can use SP in A32 instructions but this is deprecated. You cannot use SP in T32 instructions.
Condition flags
This instruction does not alter any flags.
Availability
The 32-bit instruction is available in A32 and T32.
There is no 16-bit version of this instruction in T32.
Correct examples
USADA8 r0, r3, r5, r2
USADA8VS r0, r4, r0, r1Incorrect examples
USADA8 r2, r4, r6 ; USADA8 requires four registers
USADA16 r0, r4, r0, r1 ; no such instruction