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RSQRTPS

Computes the approximate reciprocal square root of each single-precision floating-point element in a packed SIMD register.

The following table covers what the source and destinations can be.

DO NOT support LOCK

This instruction is available in both 32-bit and 64-bit modes. It requires the SSE extension to be supported by the processor.

The result is an approximation with a maximum relative error of $1.5 \times 2^{-12}$. To obtain higher precision, the result SHALL be used as an initial guess for a Newton-Raphson iteration.

If the input element is NaN, the result is the same NaN. If the input element is $\pm 0$, the result is $\infty$ and #Z is signaled. If the input element is negative, the result is qNaN and #I is signaled.

The instruction does not support memory-to-memory operations; the destination MUST be an xmm register.