WebAssembly SIMD-specific bitwise instructions.

Bitwise logic

• all_true

  • : Tests whether all lanes of a v128 input value are non-zero.

  andnot

  • : Takes two v128 input values. It performs a bitwise AND on the first value and a second value equal to the result of performing a bitwise NOT on each byte of the second original value. It returns a new v128 value containing the result.

  any_true

  • : Tests whether a v128 input value contains any non-zero bits.

  bitmask

  • : Inspects the most significant bit (MSB) — bit 7 — of each byte of a v128 value interpretation. This is the sign bit if the value is treated as signed. The instruction’s output value is equal to all of those bits collected into a single i32.

  bitselect

  • : Takes three v128 values as inputs — two inputs and a mask value — and returns a new v128 value with each byte calculated using the formula output = (input1 AND mask) OR (input2 AND NOT mask).

  not

  • : Performs a bitwise NOT on each byte of a v128 value and returns a new v128 value containing the result.

See also

• WebAssembly numeric instructions