RFR: 8327964: Simplify BigInteger.implMultiplyToLen intrinsic [v3]

[Bhavana Kilambi]

On Wed, 17 Apr 2024 12:37:01 GMT, Yudi Zheng <yzheng at openjdk.org> wrote:

>> `multiply_to_len` seems to be used by `generate_squareToLen` as well for aarch64 and riscv but `zlen` is still passed in a register.
>> 
>> https://github.com/openjdk/jdk/blob/870a6127cf54264c691f7322d775b202705c3bfa/src/hotspot/cpu/aarch64/stubGenerator_aarch64.cpp#L4710
>> https://github.com/openjdk/jdk/blob/870a6127cf54264c691f7322d775b202705c3bfa/src/hotspot/cpu/riscv/stubGenerator_riscv.cpp#L2881
>> 
>> I think it might work anyway but it might be better to adapt them if only for completeness.
>
> @dafedafe @dean-long please take a look and let me know if there are further issues, thanks!

Hi @mur47x111, do you happen to have any performance results with this patch?

-------------

PR Comment: https://git.openjdk.org/jdk/pull/18226#issuecomment-2120179701