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USADA8

Unsigned Sum of Absolute Differences and Accumulate.

USADA8{cond} Rd, Rn, Rm, Ra

where:

Operation

The USADA8 instruction adds the absolute values of the four differences to the value in Ra, and saves the result to Rd.

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.

This instruction does not alter any flags.

The 32-bit instruction is available in A32 and T32.

There is no 16-bit version of this instruction in T32.

    USADA8      r0, r3, r5, r2
    USADA8VS    r0, r4, r0, r1

    USADA8      r2, r4, r6      ; USADA8 requires four registers
    USADA16     r0, r4, r0, r1  ; no such instruction

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