LTJ UTJ
Likely Taken Jump / Unlikely Taken Jump
LTJ Jcc ; 02E [Pentium4 SSE2]
UTJ Jcc ; 03E [Pentium4 SSE2]
These instructions have no Mnemonic defined by Intel. Their Encodages are nothing but the older 'CS:' and 'DS:' Segment overrides.
These 'Branch Hint Prefixes' give information to the Processor about the more likely Code path that will be taken at a given Branching (Branch Predictions override).
These Prefixes can only be used with the Conditional Branch Instructions ( Jcc ).
See Intel Documentation for more info about the Branch Predictions mechanism.
LTJ UTJ
Likely Taken Jump / Unlikely Taken Jump
LTJ Jcc ; 02E [Pentium4 SSE2]
UTJ Jcc ; 03E [Pentium4 SSE2]
These instructions have no Mnemonic defined by Intel. Their Encodages are nothing but the older 'CS:' and 'DS:' Segment overrides.
These 'Branch Hint Prefixes' give information to the Processor about the more likely Code path that will be taken at a given Branching (Branch Predictions override).
These Prefixes can only be used with the Conditional Branch Instructions ( Jcc ).
See Intel Documentation for more info about the Branch Predictions mechanism.