[PATCH] D62368: Add support for Hygon Dhyana processor

[Jinke Fan via Phabricator via cfe-commits]

fanjinke marked an inline comment as done.
fanjinke added inline comments.


================
Comment at: compiler-rt/lib/scudo/scudo_utils.cpp:85
+                       (Ecx == signature_HYGON_ecx);
+  if (!IsIntel && !IsAMD && !IsHygon)
     return false;
----------------
craig.topper wrote:
> What's the rationale for the vendor check here anyway? Why isn't the bit in ecx sufficient?
Using the cpuid instruction to get the vendor id will return the ASCII code of the vendor id, which is stored in the ebx,ecx,edx registers.
The ASCII code in the Hygon CPU is "HygonGenuine",  the ecx = "eniu".
For better differentiation from other cpus in the future,  by following AMD/Intel way, we use full ASCII code to identify Hygon CPU.



Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D62368/new/

https://reviews.llvm.org/D62368