JDK-8275167 : x86 intrinsic for unsignedMultiplyHigh
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: 18
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • CPU: x86
  • Submitted: 2021-10-12
  • Updated: 2023-09-04
  • Resolved: 2021-10-20
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JDK 18
18 b21Fixed
Related Reports
Duplicate :  
JDK-8273058 - [macos]UnsignedMultiplyHigh is not implemented as an intrinsic
Relates :  
JDK-8275821 - Optimize random number generators developed in JDK-8248862 using Math.unsignedMultiplyHigh()
Relates :  
JDK-8188044 - We need Math.unsignedMultiplyHigh
Relates :  
JDK-8315612 - RISC-V: intrinsic for unsignedMultiplyHigh
Relates :  
JDK-8287139 - aarch64 intrinsic for unsignedMultiplyHigh
Description
Optimize the new Math.unsignedMultiplyHigh using the x86 mul instruction.
Comments
Changeset: af7c56b8 Author: vamsi-parasa <srinivas.vamsi.parasa@intel.com> Committer: Sandhya Viswanathan <sviswanathan@openjdk.org> Date: 2021-10-20 22:40:51 +0000 URL: https://git.openjdk.java.net/jdk/commit/af7c56b85bb2828a9d68f9e1c753a4adfa7ebb4f
20-10-2021