VEXTSW

Operation

Sign-extends B source elements to W destination elements.

Assembler Syntax

VEXTSW.{B}(z) Pn(p), Vn(v), Vn(w)

Privilege

Unprivileged

Required CPUID flags

VECTOR

VEXTSW treats the low B source element in each W container as a signed two's-complement value and sign-extends it across the destination W element. The governing predicate position associated with each W container controls that container. An inactive container retains its complete previous destination value. The operation leaves FLAGS unchanged.

An illustrative B-to-W VEXTSW view: each active word container sign-extends its low source byte, while inactive containers preserve the old destination value.

VEXTSW.B signed byte-to-word extension

2.75in

Encodings

VEXTSW.{B}(z) Pn(p), Vn(v), Vn(w)

Format: Instruction format for VEXTSW.{B}(z) Pn(p), Vn(v), Vn(w)

Format: Instruction format for VEXTSW.{B}(z) Pn(p), Vn(v), Vn(w)

size — allowed: 0 [reserved_vector_element_type]