vinsbvlx

Vector Insert Byte from VSR using GPR-specified Left-Index VX-form

vinsbvlx VRT,RA,VRB

Inserts a byte from one vector register into another based on an index specified in a general-purpose register.

Encoding

Binary Layout

000100

0:5

VRT

6:10

RA

11:15

VRB

16:20

00000

21:25

001111

26:31

 

Format VX-form

Opcode 0x1000000F

Extension VMX (AltiVec)

Operands

• VRT
  Target Vector Register
• RA
  Source General Purpose Register containing the index
• VRB
  Source Vector Register

Example

vinsbvlx v1, r4, v3

Related

More in VMX (AltiVec)

Reference

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

Description

The instruction inserts the contents of bits 56:63 of VSR[VRB+32] into byte element 'index' of VSR[VRT+32], where 'index' is the value of bits 60:63 of GPR[RA].

Operation

if MSR.VEC=0 then
    Vector_Unavailable()
index ← GPR[RA].bit[60:63]
VSR[VRT+32].byte[index] ← VSR[VRB+32].bit[56:63]

Programming Note

This instruction is used to insert a byte from one vector register into another, with the target index specified by bits 60-63 of a general-purpose register. Ensure that the MSR.VEC bit is set to enable vector operations; otherwise, a Vector_Unavailable exception will be raised. The index must be within the valid range for vector elements to avoid undefined behavior.