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Actually, Silverthorne (the first Atom CPU) added MOVBE.
by acallan 9y ago
Actually, Silverthorne (the first Atom CPU) added MOVBE.
- ComputerGuru 9y agoIt seems that Atom has become - ironically - a staging ground for new features that make their way much later to the desktop/mobile x86_64 architecture. Here's another: https://neosmart.net/blog/2017/will-amds-ryzen-finally-bring-sha-extensions-to-intels-cpus/ https://neosmart.net/blog/2017/will-amds-ryzen-finally-bring...
- monocasa 9y agoThose little cores get a lot more benefit out of special case instructions.
- awalton 9y agoIt's less that, and more that in high-performance-at-low-power realms, density (and CISC) is good - it means big complex operations can be hidden behind single instructions instead of needing multiple instructions and powering all of that hardware for multiple cycles. The Atom needs instructions that make bigger, more complex operations simpler and lower powered, and with transistors the size they are these days they have ample silicon space to burn on these types of accelerators.