asm/reference

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

MULPS



Multiplies four single-precision floating-point numbers from a source operand by four single-precision floating-point numbers from a destination operand and stores the results in the destination operand.

The following table covers what the source and destinations can be:

source destination(s)
xmm reg xmm reg
m128 xmm reg

DO NOT support LOCK

This instruction requires SSE support. It is available in both 64-bit mode and compatibility mode.

The operation is performed according to the IEEE 754 standard. The floating-point unit control word determines the rounding behavior and exception masking.

Incorrect alignment of the m128 operand may result in a general-protection exception (#GP) if alignment checking is enabled in the CR0 register. Ensure the memory operand is aligned on a 16-byte boundary to avoid performance degradation or faults.