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  Új Válasz 2022-12-25 16:50:14 #8443

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  Golden Cove’s Lopsided Vector Register File
  https://chipsandcheese.com/2022/12/25/golden-coves-lopsided-vector-register-file/
  AVX-512 Intel vs. AMD megközelítés elemzése ..
  
  " With regards to SMT register allocation, AMD appears to competitively share the vector register file. There is no cut-in-half partitioning or watermarking. One thread can use a very large portion of the vector register file even when the second thread is active. The difference in reordering capacity when a second thread comes active but doesn’t use FP registers, is accounted for by having to store architectural state for the second thread. That’s 32 AVX-512 registers and eight MMX/x87 registers. Other than that, the first thread is free to use whatever it needs from the vector register file. Zen 2 appears to use a similar strategy, though of course fewer registers are reserved to hold architectural state because AVX2 only has 16 vector registers.
  "

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