RFR: 8302191: Performance degradation for float/double modulo on Linux [v9]

Mon Mar 13 16:14:32 UTC 2023

On Sat, 4 Mar 2023 01:11:33 GMT, Sandhya Viswanathan <sviswanathan at openjdk.org> wrote:

> Very nice performance increase. The only concern I have is that the x87 fpu control (using fldcw instruction) is not set in 64 bit builds by the JVM anymore explicitly. It is only set in the 32bit builds. Maybe @iwanowww or @shipilev have some thoughts on this.

The default value of x87 fpu control word (0x37F) works for this case so it should be ok.

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PR: https://git.openjdk.org/jdk/pull/12508