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SIMD ISAReturn TypeNameArgumentsInstruction Group
Neonint8x16_tvpmaxq_s8(int8x16_t a, int8x16_t b)Vector arithmetic / Pairwise arithmetic / Pairwise maximum
Description
Signed Maximum Pairwise. This instruction creates a vector by concatenating the vector elements of the first source SIMD&FP register after the vector elements of the second source SIMD&FP register, reads each pair of adjacent vector elements in the two source SIMD&FP registers, writes the largest of each pair of signed integer values into a vector, and writes the vector to the destination SIMD&FP register.
Results
Vd.16B result
This intrinsic compiles to the following instructions:

SMAXP Vd.16B,Vn.16B,Vm.16B

Argument Preparation
a register: Vn.16Bb register: Vm.16B
Architectures
A64

Operation

CheckFPAdvSIMDEnabled64();
bits(datasize) operand1 = V[n];
bits(datasize) operand2 = V[m];
bits(datasize) result;
bits(2*datasize) concat = operand2:operand1;
integer element1;
integer element2;
integer maxmin;

for e = 0 to elements-1
    element1 = Int(Elem[concat, 2*e, esize], unsigned);
    element2 = Int(Elem[concat, (2*e)+1, esize], unsigned);
    maxmin = if minimum then Min(element1, element2) else Max(element1, element2);
    Elem[result, e, esize] = maxmin<esize-1:0>;

V[d] = result;