4 ms·
No, that's the wrong way to parse it, as there are explicitly _two_ bits on the MSR (DOITM and MCDT), and this thread is about DOITM. All the instructions in t
by AshamedCaptain 4y ago
No, that's the wrong way to parse it, as there are explicitly _two_ bits on the MSR (DOITM and MCDT), and this thread is about DOITM.
All the instructions in the list are no longer (guaranteed to be?) constant-time unless the DOITM bit is set.
> Specifically, when data operand independent timing mode [DOITM] is enabled, instructions within the data operand independent timing subset execute with timing (in terms of processor cycles) that is independent of the data values in the sources of the instruction