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SIMD ISAReturn TypeNameArgumentsInstruction Group
Neonint64x2_tvmull_high_s32(int32x4_t a, int32x4_t b)Vector arithmetic / Multiply / Widening multiplication
Description
Signed Multiply Long (vector). This instruction multiplies corresponding signed integer values in the lower or upper half of the vectors of the two source SIMD&FP registers, places the results in a vector, and writes the vector to the destination SIMD&FP register.
Results
Vd.2D result
This intrinsic compiles to the following instructions:

SMULL2 Vd.2D,Vn.4S,Vm.4S

Argument Preparation
a register: Vn.4Sb register: Vm.4S
Architectures
A64

Operation

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

for e = 0 to elements-1
    element1 = Int(Elem[operand1, e, esize], unsigned);
    element2 = Int(Elem[operand2, e, esize], unsigned);
    Elem[result, e, 2*esize] = (element1 * element2)<2*esize-1:0>;

V[d] = result;