VEXTSQ

Operation

Sign-extends B, W, or L source elements to Q destination elements.

Assembler Syntax

VEXTSQ.{B|W|L}(z) Pn(p), Vn(v), Vn(w)

Privilege

Unprivileged

Required CPUID flags

VECTOR

VEXTSQ treats each selected B, W, or L source element as a signed two's-complement value and sign-extends it into the corresponding Q destination container. The governing predicate position associated with each Q container controls that container. An inactive container retains its complete previous destination value. The operation leaves FLAGS unchanged.

An illustrative L-to-Q VEXTSQ view: each active quadword container sign-extends its low source longword, while inactive containers preserve the old destination value.

VEXTSQ.L signed long-to-quad extension

2.75in

Encodings

VEXTSQ.{B|W|L}(z) Pn(p), Vn(v), Vn(w)

Format: Instruction format for VEXTSQ.{B|W|L}(z) Pn(p), Vn(v), Vn(w)

Format: Instruction format for VEXTSQ.{B|W|L}(z) Pn(p), Vn(v), Vn(w)

size — allowed: 0x0..0x2 [reserved_vector_element_type]