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TTEST

This instruction takes no inputs and writes to the depthdestination ofregister the value 1 when executed in an outer transaction, to the destinationvalue register2 when executed in a nested transaction, or the value 0 otherwise.

System
(TME)

313029282726252423222120191817161514131211109876543210
110101010010001100110001011Rt

System

TTEST <Xt>

if !HaveTME() then UNDEFINED; integer t = UInt(Rt);

Assembler Symbols

<Xt>

Is the 64-bit name of the general-purpose destination register, encoded in the "Rt" field.

Operation

CheckTMEEnabled(); X[t] = (TSTATE.depth)<63:0>;


Internal version only: isa v30.44v30.42, AdvSIMD v27.08, pseudocode v8.5-2019-06_rc2-5-g22901f2future-20190403, sve v2019-06_rc4v8.5-00bet10_rc5 ; Build timestamp: 2019-06-26T222019-04-17T09:0458

Copyright © 2010-2019 Arm Limited or its affiliates. All rights reserved. This document is Non-Confidential.

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