xxspltw

VSX Vector Splat Word

xxspltw XT, XS, UIM

Replicates a word element from one vector register into all elements of another vector register.

Encoding

Binary Layout

60

XT

UIM

XS

164

 

Format XX2-form

Opcode 0xF0000290

Extension VSX

Operands

• XT
  Target
• XS
  Source
• UIM
  Index
• XB
  Source Vector Register

Example

xxspltw vs1, vs1, uim

Registers Altered

MSR

Related

More in VSX

Reference

View in PowerISA v3.1C Specification ↗ OPF Power ISA v3.1C

Description

The contents of the specified word element UIM in VSR[XB] are replicated into each word element of VSR[XT].

Operation

if MSR.VSX=0 then VSX_Unavailable()

XT <- XB.word[UIM]
VSR[32×TX+T].word[0] ← XT
VSR[32×TX+T].word[1] ← XT
VSR[32×TX+T].word[2] ← XT
VSR[32×TX+T].word[3] ← XT

Programming Note

The xxspltw instruction is commonly used to replicate a word element from one vector register into all elements of another vector register. Ensure that the VSX (Vector Scalar Extensions) are enabled in the MSR register; otherwise, an exception will be raised. This instruction does not have specific alignment requirements and operates at user privilege level.