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SIMD ISAReturn TypeNameArgumentsInstruction Group
Neonfloat64_tvmaxnmvq_f64(float64x2_t a)Vector arithmetic / Across vector arithmetic / Maximum across vector (IEEE754)
Description
Floating-point Maximum Number Pairwise (vector). 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 values into a vector, and writes the vector to the destination SIMD&FP register. All the values in this instruction are floating-point values.
Results
Dd result
This intrinsic compiles to the following instructions:

FMAXNMP Dd,Vn.2D

Argument Preparation
a register: Vn.2D
Architectures
A64

Operation

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

for e = 0 to elements-1
    if pair then
        element1 = Elem[concat, 2*e, esize];
        element2 = Elem[concat, (2*e)+1, esize];
    else
        element1 = Elem[operand1, e, esize];
        element2 = Elem[operand2, e, esize];

    if minimum then
        Elem[result, e, esize] = FPMinNum(element1, element2, FPCR[]);
    else
        Elem[result, e, esize] = FPMaxNum(element1, element2, FPCR[]);

V[d] = result;