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

PAVGB

Computes the average of two packed floating-point values. The instruction adds the two source operands and multiplies the result by 0.5.

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

DO NOT support LOCK

This instruction is ONLY available when the processor is operating in 64-bit mode or compatibility mode. It REQUIRES support for the AVX or AVX-512 instruction sets depending on the register width used.

To avoid precision loss or unexpected results, the user SHALL ensure that the input values are valid floating-point numbers; if either input is a NaN, the result SHALL be a NaN. The operation is subject to the rounding control in the MXCSR register.