Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-8201193

Use XMM/YMM for objects initialization

    XMLWordPrintable

Details

    • b18
    • x86
    • generic

    Backports

      Description

        Right now, for longer lengths we use "rep stos" instructions on x86, for short lengths we use "mov rax". Experiments show that we can use XMM/YMM registers for middle lengths to improve objects initialization perofrmance.

        Attachments

          Issue Links

            backported by

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8205309 Use XMM/YMM for objects initialization

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved
            relates to

            Enhancement - null JDK-8146801 Allocating short arrays of non-constant size is slow

            • P3 - Major loss of function.
            • Resolved

            Activity

              People

                kvn Vladimir Kozlov
                kvn Vladimir Kozlov
                Votes:
                0 Vote for this issue
                Watchers:
                2 Start watching this issue

                Dates

                  Created:
                  Updated:
                  Resolved: