3 ms·
In the Alpha case it was a very late addition, in the last widely shipping version of the chip and IIRC was speculated to be part of some supercomputer/classifi
by fulafel 6y ago
In the Alpha case it was a very late addition, in the last widely shipping version of the chip and IIRC was speculated to be part of some supercomputer/classified use case. ARM has a history of having quirky un-RISCy instructions.
(edit: also it seems that ARM has just cnt.v8 for counting 8-bit lanes in NEON and no 64-bit scalar instruction version, interesting. Being part of NEON also means it's an optional part on ARM)
- ncmncm 6y agoLate addition is more indicative of value than appearing in first releases. People guess about the base instruction set, but additions happen only in response to high demand.