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SIMD ISAReturn TypeNameArgumentsInstruction Group
Neonuint16x8_tvabal_high_u8(uint16x8_t a, uint8x16_t b, uint8x16_t c)Vector arithmetic / Absolute / Widening absolute difference and accumulate
Description
Unsigned Absolute difference and Accumulate Long. This instruction subtracts the vector elements in the lower or upper half of the second source SIMD&FP register from the corresponding vector elements of the first source SIMD&FP register, and accumulates the absolute values of the results into the vector elements of the destination SIMD&FP register. The destination vector elements are twice as long as the source vector elements. All the values in this instruction are unsigned integer values.
Results
Vd.8H result
This intrinsic compiles to the following instructions:

UABAL2 Vd.8H,Vn.16B,Vm.16B

Argument Preparation
a register: Vd.8Hb register: Vn.16Bc register: Vm.16B
Architectures
A64

Operation

CheckFPAdvSIMDEnabled64();
bits(datasize)   operand1 = Vpart[n, part];
bits(datasize)   operand2 = Vpart[m, part];
bits(2*datasize) result;
integer element1;
integer element2;
bits(2*esize) absdiff;

result = if accumulate then V[d] else Zeros();
for e = 0 to elements-1
    element1 = Int(Elem[operand1, e, esize], unsigned);
    element2 = Int(Elem[operand2, e, esize], unsigned);
    absdiff = Abs(element1 - element2)<2*esize-1:0>;
    Elem[result, e, 2*esize] = Elem[result, e, 2*esize] + absdiff;
V[d] = result;