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VPBROADCASTB

Broadcasts a byte from a source operand to all bytes of a destination vector register.

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

DO NOT support LOCK

This instruction is only available in 64-bit mode or 32-bit mode. It requires the AVX or AVX-512 instruction set extensions depending on the vector length used.

The destination register is overwritten; therefore, the original content of the destination register is not preserved. When using YMM or ZMM registers, the operation is subject to the specific AVX-512 masks if used in a masked version of the instruction. Failure to ensure the processor supports the required extension (AVX/AVX-512) will result in an invalid opcode exception.