The open corpus of JMH micros is a maven project here: http://hg.openjdk.java.net/code-tools/jmh-jdk-microbenchmarks

It contains various crypto micros. AESGCMBench.decrypt AES/GCM/NoPadding shows a case with an intrinsic for C2 where Graal does not yet have one and uses the jitted version, so one test system the score is:
C2:
Benchmark (algorithm) (dataSize) (keyLength) (provider) Mode Cnt Score Error Units
AESGCMBench.decrypt AES/GCM/NoPadding 1024 128 thrpt 8 350500.214 ± 23761.865 ops/s
Graal:
Benchmark (algorithm) (dataSize) (keyLength) (provider) Mode Cnt Score Error Units
AESGCMBench.decrypt AES/GCM/NoPadding 1024 128 thrpt 8 23644.262 ± 13400.185 ops/s

You can see the difference by using JMH linux perfasm with hsdis, I will attach profiles later.