Intel Arrow Lake-S Desktop CPUs Might Have ISA-Edge Over Arrow Lake-H Mobile
Intel's next-gen Arrow Lake-S Desktop CPUs might have an edge in terms of Instruction Set support over their mobile Arrow Lake-H siblings.
According to the 50th Future ISA Guide published by Intel, it looks like the Arrow Lake ISA (Instruction Set Architecture) will vary between desktop and laptop platforms.
The ISA Guide is basically a list of instruction sets that either exist or will be added to a CPU family from Intel. Intel has revealed that the Arrow Lake Desktop CPUs will come with support for a set of instructions such as the AVX-VNNI-INT16, SHA512, SM3, and SM4, along with LBR Event Logging. Now these instruction sets won't feature in Arrow Lake-H CPUs which target the mobility side of things, and while Intel hasn't given an explanation behind the decision, it may have something to do with the usability of the mentioned instructions and the core structure of both families which we will discuss later on.
Speaking of what these individual instructions are, the AVX-VNNI-INT16 is a type of "Vector Neural Network Instructions", which basically aims at making tasks involving deep learning and AI tasks much faster. The exclusion of it in Arrow Lake-H mobile chips would result in a considerably lower performance at genAI workloads versus the Arrow Lake-S parts, but it wouldn't have much of an impact in mainstream applications, hence consumers who aren't into AI shouldn't worry about it.
According to the 50th Future ISA Guide, this time #ArrowLakeH C065x mobile has different ISA than the #ArrowLakeS C066x desktop#AVX_VNNI_INT16, #SHA512, #SM3, #SM4 https://t.co/5nUqDcnoDl pic.twitter.com/Yf1dvLBNOY
— InstLatX64 (@InstLatX64) October 30, 2023
Similarly, SHA512, SM3, and SM4 cryptographic-based instructions, are aimed at
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