Reciprocal of square root (single precision) (Reciprocal of the Square Root of a Floating-point Value (Single))
This instruction obtains the arithmetic positive square root of the single-precision floating-point format contents of general-purpose register reg1, then approximates the reciprocal of this result and stores it in general-purpose register reg2.
The result differs from the result obtained when using a combination of the sqrtf and divf instructions.