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SIMD ISAReturn TypeNameArgumentsInstruction Group
Neonuint16x8_tvabdl_u8(uint8x8_t a, uint8x8_t b)Vector arithmetic / Absolute / Widening absolute difference
Description
Unsigned Absolute Difference 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, places the absolute value of the result into a vector, and writes the vector to 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:

UABDL Vd.8H,Vn.8B,Vm.8B

Argument Preparation
a register: Vn.8Bb register: Vm.8B
Architectures
v7, A32, 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;