Difference between revisions of "Count Instruction Extension"
(Imported from http://web.archive.org/web/20110529090708/http://www.alphalinux.org/wiki/index.php?title=Count_Instruction_Extension&action=edit)
Latest revision as of 18:25, 29 August 2019
Initially implemented in the EV67 processor, the Count Instruction Extension adds three instructions to count bits.
|ctlz||Count Leading Zeros|
|ctpop||Count Population (Count number of 1's)|
|cttz||Count Trailing Zeros|
To determine the presence of CIX, use the amask instruction.
Latency and Slotting
The CIX instructions are slotted U0 and have a latency of 3 cycles. .