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

ROUNDPD

Rounds the double-precision floating-point values in the destination operand to the rounding direction specified by the immediate operand.

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

DO NOT support LOCK

This instruction is available only when SSE4.1 is supported. It operates on double-precision floating-point values and is available in both 32-bit and 64-bit modes.

The immediate operand MUST be a value between 0 and 3 to specify the rounding direction (00: round to nearest, 01: round toward negative infinity, 10: round toward positive infinity, 11: round toward zero). Any other immediate value SHALL result in an #I exception. The instruction MAY trigger #P if the rounded result is not exact.