tabortwc

Transaction Abort Word Conditional

tabortwc TO, RA, RB

Aborts a transaction if the condition is met (Word comparison).

Encoding

Binary Layout

31

0:5

TO

6:10

RA

11:15

RB

16:20

782

21:30

1

31

 

Format X-form

Opcode 0x7C00061D

Extension Transactional Memory

Operands

• TO
  Options
• RA
  Src A
• RB
  Src B

Example

tabortwc 4, r4, r5

Registers Altered

CR, CR0, CR1, CR6, MSR, TAR

Related

More in Transactional Memory

Reference

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

Description

Transaction Abort Word Conditional. Aborts the current transaction if the condition formed by TO and the comparison of RA and RB is true. Records the abort cause in TEXASR.

Operation

if Transactional() then
  if TO_condition(TO, RA, RB) then
    Abort_Transaction(cause=Explicit)

Programming Note

Use tabortwc to conditionally abort a transaction based on a comparison between two registers. Ensure that the transaction is active when using this instruction; otherwise, it will have no effect. The TO field specifies the type of comparison (e.g., equal, less than). Be cautious with the privilege level and ensure the MSR[TS] bit is set to enable transactions.