JDK-8283892 : Compress and expand bits
  • Type: Enhancement
  • Component: core-libs
  • Sub-Component: java.lang
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • Submitted: 2022-03-29
  • Updated: 2022-06-14
  • Resolved: 2022-04-14
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JDK 19
19 b19Fixed
Related Reports
Blocks :  
JDK-8283894 - Intrinsify compress and expand bits on x86
Blocks :  
JDK-8284964 - Add new vector operation for compress and expand bits
CSR :  
JDK-8283893 - Compress and expand bits
Relates :  
JDK-8280173 - JEP 426: Vector API (Fourth Incubator)
Relates :  
JDK-8288414 - Long::compress/expand samples are not correct
Description
Add compress and expand bits methods to Integer and Long.

For details see Hacker's Delight section 7-4 Compress, or Generalized Extract.

The implementations will utilize the parallel suffix method. The methods will be made intrinsic in dependent issues.
Comments
Changeset: fbb09160 Author: Paul Sandoz <psandoz@openjdk.org> Date: 2022-04-14 20:27:12 +0000 URL: https://git.openjdk.java.net/jdk/commit/fbb09160906b4d9b0a29c8e99465f12ad16d4c88
14-04-2022
A pull request was submitted for review. URL: https://git.openjdk.java.net/jdk/pull/8115 Date: 2022-04-05 22:05:19 +0000
05-04-2022