RFR: JDK-8210858: AArch64: remove Math.log intrinsic

[Nick Gasson]

On Thu, 18 Jan 2024 08:58:20 GMT, Tobias Holenstein <tholenstein at openjdk.org> wrote:

> [JDK-8215133](https://bugs.openjdk.org/browse/JDK-8215133) disabled vmIntrinsics::_dlog. Remove it now
> 
> ### Why remove
> 
> That Java  specification says:
> 
> "The computed result must be within 1 ulp of the exact result. Results must be semi-monotonic... whenever the mathematical function is non-decreasing, so is the floating-point approximation, likewise, whenever the mathematical function is non-increasing, so is the floating-point approximation"
> 
> There is no proof of the monotonicity of this intrinsics at the moment.

Should we also remove `MacroAssembler::fast_log()` and `generate_dlog()` as they are unused now?

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PR Comment: https://git.openjdk.org/jdk/pull/17480#issuecomment-1898103477