xBGAS: A Bridge Proposal For RV128 And HPC
summary
Proposes xBGAS, an extended register file and instruction subset that maps RV32/64 binaries into a global object-based address space to address graphs with hundreds of billions to trillions of edges and to expose datacenter storage tiers and RDMA interconnects natively. Implements three instruction classes including raw integer loads for explicit object scattering and three address-management ops; LLVM-based compiler prototype runs and the Spike simulator is being brought up; spec and toolchain are on GitHub; FP and atomics are not yet implemented.
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chapters (9)
- 0:00Intro
- 0:48Data Center Scale Addressing
- 3:01Application Domains
- 5:00Addressing Architecture . Arch maps extended addressing
- 7:34ISA Extension Encodings
- 8:16ABI (Calling Convention)
- 9:29Research & Progress
- 10:53Community Support & Interest
- 11:14Acknowledgements
