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VRCP28SD

Computes the reciprocal approximation of a scalar double-precision floating-point value. The instruction calculates an approximation of $1/x$ with a relative error of $2^{-28}$.

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

DO NOT support LOCK

This instruction is available only in 64-bit mode or compatibility mode. It requires the AVX instruction set to be enabled.

The result of the approximation is not exact; therefore, the #P exception may be raised. The instruction does not support memory operands for either source or destination; operands MUST be registers. If the input is a NaN, the result is a NaN. If the input is $\pm 0$, the result is $\pm \infty$.