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

VCVTSD2USI

Converts a scalar double-precision floating-point value to an unsigned 64-bit integer. The conversion uses the rounding mode specified in the MXCSR register. If the source value is NaN or exceeds the range of a 64-bit unsigned integer, a #S (Invalid Operation) exception is generated and the destination is set to the indeterminate value.

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

DO NOT support LOCK

This instruction is only available in 64-bit mode. It SHALL NOT be used in compatibility mode.

If the source operand is a signaling NaN, a #S exception is raised. If the resulting unsigned integer is out of range (greater than $2^{64}-1$ or less than 0), a #S exception is raised. Precision (#P) is raised if the result is not exact.