Search all intrinsics
SIMD ISAReturn TypeNameArgumentsInstruction Group
Neonuint32x4_tvmlal_u16(uint32x4_t a, uint16x4_t b, uint16x4_t c)Vector arithmetic / Multiply / Multiply-accumulate and widen
Description
Unsigned Multiply-Add Long (vector). This instruction multiplies the vector elements in the lower or upper half of the first source SIMD&FP register by the corresponding vector elements of the second source SIMD&FP register, and accumulates the results with the vector elements of the destination SIMD&FP register. The destination vector elements are twice as long as the elements that are multiplied.
Results
Vd.4S result
This intrinsic compiles to the following instructions:

UMLAL Vd.4S,Vn.4H,Vm.4H

Argument Preparation
a register: Vd.4Sb register: Vn.4Hc register: Vm.4H
Architectures
v7, A32, A64

Operation

CheckFPAdvSIMDEnabled64();
bits(datasize)   operand1 = Vpart[n, part];
bits(datasize)   operand2 = Vpart[m, part];
bits(2*datasize) operand3 = V[d];
bits(2*datasize) result;
integer element1;
integer element2;
bits(2*esize) product;
bits(2*esize) accum;

for e = 0 to elements-1
    element1 = Int(Elem[operand1, e, esize], unsigned);
    element2 = Int(Elem[operand2, e, esize], unsigned);
    product = (element1 * element2)<2*esize-1:0>;
    if sub_op then
        accum = Elem[operand3, e, 2*esize] - product;
    else
        accum = Elem[operand3, e, 2*esize] + product;
    Elem[result, e, 2*esize] = accum;

V[d] = result;