This content has not been validated; it was AI-generated following the x86-64 ISA Documentation generation process to maintain high quality. However, as no human has verified this data, errors may exist. If the accuracy of this data is critical, please consult the Intel SDM. The model used to generate this is gemma4:31b

VRSQRT14SD

Computes the approximate reciprocal square root of a scalar double-precision floating-point value with a relative error of less than or equal to $2^{-14}$.

The following table describes the supported source and destination operands.

DO NOT support LOCK

This instruction is available only when the AVX instruction set is supported. It operates on the lowest 64 bits of the xmm registers.

If the input is a NaN, the result is a qNaN. If the input is $\pm 0$, the result is $\pm \infty$. If the input is $-\infty$ or any negative number, the result is a qNaN.

The result is an approximation; therefore, users SHOULD NOT expect the precision of a full SQRTSD followed by a DIVSD operation. The instruction MAY trigger #P.