VTRUNCW

Operation

Copies the low W field from each L or Q source container.

Assembler Syntax

VTRUNCW.{L|Q}(z) Pn(p), Vn(v), Vn(w)

Privilege

Unprivileged

Required CPUID flags

VECTOR

VTRUNCW copies the low W field of each selected L or Q source container into the low W field of the corresponding destination container. For an active container, the destination fields above that word retain their previous values. An inactive container retains its complete previous destination value. The operation leaves FLAGS unchanged.

An illustrative L-container VTRUNCW view: each active container copies the low source word into the low destination word and preserves the old destination high word; inactive containers preserve the complete old destination value.

VTRUNCW.L low-word truncation

2.75in

Encodings

VTRUNCW.{L|Q}(z) Pn(p), Vn(v), Vn(w)

Format: Instruction format for VTRUNCW.{L|Q}(z) Pn(p), Vn(v), Vn(w)

Format: Instruction format for VTRUNCW.{L|Q}(z) Pn(p), Vn(v), Vn(w)

size — allowed: 0x2..0x3 [reserved_vector_element_type]