RFR: 8327964: Simplify BigInteger.implMultiplyToLen intrinsic [v2]

[Dean Long]

On Tue, 19 Mar 2024 19:06:36 GMT, Yudi Zheng <yzheng at openjdk.org> wrote:

>> Moving array construction within BigInteger.implMultiplyToLen intrinsic candidate to its caller simplifies the intrinsic implementation in JIT compiler.
>
> Yudi Zheng has updated the pull request incrementally with one additional commit since the last revision:
> 
>   address comment.

src/hotspot/cpu/aarch64/macroAssembler_aarch64.cpp line 3559:

> 3557:                                      Register tmp5, Register tmp6, Register product_hi, Register tmp8) {
> 3558: 
> 3559:   assert_different_registers(x, xlen, y, ylen, z, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp8);

Suggestion:

  assert_different_registers(x, xlen, y, ylen, z, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp8, product_hi);

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PR Review Comment: https://git.openjdk.org/jdk/pull/18226#discussion_r1530980566