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

VCVTTPD2UQQ

Converts packed double-precision floating-point values to unsigned 64-bit integers. The operation truncates the floating-point values toward zero.

The table after the description covers what the source and destinations can be.

DO NOT support LOCK

This instruction is available only in 64-bit mode. It is not supported in compatibility mode.

The destination register r64 must be different from the source xmm register. If the converted value is too large to be represented in a u64 (overflow), the destination is filled with the indefinite integer value $2^{64}-1$. Precision exceptions (#P) may be raised if the result is rounded.