Unsigned Sum of Absolute Differences and Accumulate.
is an optional condition code.
is the destination register.
is the register holding the first operand.
is the register holding the second operand.
is the register holding the accumulate operand.
USADA8 instruction adds the
absolute values of the four differences to the value in
and saves the result to
You cannot use PC for any register.
You can use SP in ARM instructions but this is deprecated in ARMv6T2 and above. You cannot use SP in Thumb instructions.
This instruction does not alter any flags.
This ARM instruction is available in ARMv6 and above.
This 32-bit Thumb instruction is available in ARMv6T2 and above. For the ARMv7-M architecture, it is only available in an ARMv7E-M implementation.
There is no 16-bit version of this instruction in Thumb.
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