Index

TTEST

This instruction writes the depth of the transaction to the destination register, or the value 0 otherwise.

System
(FEAT_TME)

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
1 1 0 1 0 1 0 1 0 0 1 0 0 0 1 1 0 0 1 1 0 0 0 1 0 1 1 Rt

TTEST <Xt>

if !IsFeatureImplemented(FEAT_TME) 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

if !IsTMEEnabled() then UNDEFINED;

X[t, 64] = (TSTATE.depth)<63:0>;