Is a width specifier,
- Is the number of the SIMD and FP destination register.
- Is the number of the first SIMD and FP source register.
- Is the number of the second SIMD and FP source register.
Subtract (vector). This instruction subtracts each vector element in the second source SIMD and FP register from the corresponding vector element in the first source SIMD and FP register, places the result into a vector, and writes the vector to the destination SIMD and FP register.
Depending on the settings in the CPACR_EL1, CPTR_EL2, and CPTR_EL3 registers, and the current Security state and Exception level, an attempt to execute the instruction might be trapped.