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VRCP14PS

Computes an approximation of the reciprocal of each single-precision floating-point value in the source and stores the result in the destination. The result is an approximation with a relative error of at most $2^{-14}$.

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

DO NOT support LOCK

This instruction requires SSE4.1 or AVX/AVX2/AVX-512 support depending on the register width used. It operates in 32-bit precision (single precision); using it in 64-bit precision is not supported.

The result is an approximation and NOT a precise reciprocal. To achieve higher precision, the result MUST be used as an initial guess for a Newton-Raphson iteration. The instruction does not set the precision (#P) or underflow (#U) exceptions. Special values such as $\pm\infty$ and NaNs are handled according to the IEEE 754 standard, where the reciprocal of $\pm\infty$ is $\pm 0$.