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Updated Support for AARCH64 (markdown)

JayDDee
2023-10-05 17:07:53 -04:00
parent b498d8908e
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Support-for-AARCH64.md

@@ -1,12 +1,12 @@
Development is begining to provide support for ARM 64 bit CPUs using the aarch64 architecture.
Current status: nothing publicly released.
Coding is progressing with many issues translating SSE to NEON. Some things are done very differently and some things may not be possible.
The lack of flexible lane shuffling is a major problem. Some shuffles may have to be done by inserting one lane at a time.
Current expectations are best performance will be with sha256 based algos and some algos that use AES. Current issues exist with AES for echo & fugue.
Parallel 4 way hashing will not be provided initially but will be added later.
Current problem algos include anything with Echo or Fugue, there are problems with the AES implementation.
Simd has a problem with multiplication that I haven't resolved.
Scrypt has issues with the lack of a blend instruction in NEON that requires a workaround. The lack of mask creating doesn't make it any easier.
Yespower/yescrypt also have issues that aren't fully understood due to the complexity of the current code.
Unresolved issues will result in using completely unoptimized "reference" code.
* Current status: nothing publicly released.
* Coding is progressing with many issues translating SSE to NEON. Some things are done very differently and some things may not be possible.
* The lack of flexible lane shuffling is a major problem. Some shuffles may have to be done by inserting one lane at a time.
* Current expectations are best performance will be with sha256 based algos and some algos that use AES. Current issues exist with AES for echo & fugue.
* Parallel 4 way hashing will not be provided initially but will be added later.
* Current problem algos include anything with Echo or Fugue, there are problems with the AES implementation.
* Simd has a problem with multiplication that I haven't resolved.
* Scrypt has issues with the lack of a blend instruction in NEON that requires a workaround. The lack of mask creating doesn't make it any easier.
* Yespower/yescrypt also have issues that aren't fully understood due to the complexity of the current code.
* Unresolved issues will result in using completely unoptimized "reference" code.