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RISC did change everything - the primary computing device of users are ARM-based phones. Dependent on x86 servers in the cloud for much though. Of course it's
by tenebrisalietum 5y ago
RISC did change everything - the primary computing device of users are ARM-based phones. Dependent on x86 servers in the cloud for much though.
Of course it's arguable how RISCy ARM really is, but x86 is the only CISC left for non-embedded computing anymore, and really A) it's a hybrid with SIMD and a lot of recent instructions, and B) I the ISA is essentially internally virtualized atop a microarchitecture which operates vastly differently than the ISA - all the wacky stuff done for performance is tucked away there until it rears its head with Spectre-like issues and such.
Further, couldn't it be said that RISC changed Intel? - one wonders what Intel would have done had RISC not been making gains in the 90's against Intel.
- p_l 5y agoMicrocoded CISC has been state of art method to implementing CISC cpus since ... 1960s? The one x86 that actually had a RISC core inside was AMD K5, which essentially used 29050 core with an x86 frontend slapped on it (in great simplification). Am29k architecture is still used and produced by Honeywell for their avionics systems.