The following AI Engine APIs allow bitwise AND, OR, XOR, and NOT operations on a scalar value and all the elements of the input vector with same type, or on two input vectors with same type and size.
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aie::bit_and -
aie::bit_or -
aie::bit_xor
The following AI Engine API allows bitwise NOT operations on the elements of the input vector.
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aie::bit_not
Note: The
aie::bit_* operations are emulated on a scalar processor in AI Engine.aie::vector<int16,8> iv,iv2;
aie::vector<int16,8> iv_bit_and=aie::bit_and((int16)0xf,iv);//0xf bit AND with each component of iv
aie::vector<int16,8> iv_bit_or=aie::bit_or((int16)0xf,iv);
aie::vector<int16,8> iv_bit_xor=aie::bit_xor((int16)0xf,iv);
aie::vector<int16,8> iv_bit_and2=aie::bit_and(iv,iv2);//bit AND on each component of iv and iv2
aie::vector<int16,8> iv_bit_or2=aie::bit_or(iv,iv2);
aie::vector<int16,8> iv_bit_xor2=aie::bit_xor(iv,iv2);
aie::vector<int16,8> iv_not=aie::bit_not(iv);The following AI Engine APIs provide to shift all components of a vector right or left by specified number of bits.
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aie::downshift: Shifts each component of a vector arithmetically (signed extended) right 2 bits. -
aie::upshift: Shifts each component left 2 bits. Filled by 0.
aie::vector<int16,8> iv_down=aie::downshift(iv,2);aie::vector<int16,8> iv_up=aie::upshift(iv,2);