On Thu, 13 Nov 2025 16:48:28 GMT, Martin Doerr <[email protected]> wrote:
> This fix simplifies the hotspot intrinsics for some platforms and optimizes > the key computation for encryption. We can save the `genInvRoundKeys` > computation when we only do encryption. > > The micro:org.openjdk.bench.javax.crypto.AESReinit benchmark results are > improved by 17% for ppc64 and 26% for x86_64. src/hotspot/share/opto/library_call.cpp line 7483: > 7481: // However, ppc64 vncipher processes MixColumns and requires the same > round keys with encryption. > 7482: // The ppc64 and riscv64 stubs of encryption and decryption use the > same round keys (sessionK[0]). > 7483: Node* objSessionK = load_field_from_object(aescrypt_object, > "sessionK", "[[I"); Good catch, as I didn't see that intrinsics wasn't using the second array element (inverse key schedule) for these platforms all this time! ------------- PR Review Comment: https://git.openjdk.org/jdk/pull/28299#discussion_r2526153490
