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SIMD ISAReturn TypeNameArgumentsInstruction Group
Neonuint8x8_tvcnt_u8(uint8x8_t a)Bit manipulation / Population count
Description
Population Count per byte. This instruction counts the number of bits that have a value of one in each vector element in the source SIMD&FP register, places the result into a vector, and writes the vector to the destination SIMD&FP register.
Results
Vd.8B result
This intrinsic compiles to the following instructions:

CNT Vd.8B,Vn.8B

Argument Preparation
a register: Vn.8B
Architectures
v7, A32, A64

Operation

CheckFPAdvSIMDEnabled64();
bits(datasize) operand = V[n];
bits(datasize) result;

integer count;
for e = 0 to elements-1
    count = BitCount(Elem[operand, e, esize]);
    Elem[result, e, esize] = count<esize-1:0>;
V[d] = result;