[llvm] 7e186d3 - [LoongArch] Fix the procossor series mask

[Weining Lu via llvm-commits]

Author: Weining Lu
Date: 2024-01-03T14:01:05+08:00
New Revision: 7e186d366d6c7def0543acc255931f617e76dff0

URL: https://github.com/llvm/llvm-project/commit/7e186d366d6c7def0543acc255931f617e76dff0
DIFF: https://github.com/llvm/llvm-project/commit/7e186d366d6c7def0543acc255931f617e76dff0.diff

LOG: [LoongArch] Fix the procossor series mask

Refer PRID_SERIES_MASK definition in linux kernel:
arch/loongarch/include/asm/cpu.h.

Added: 
    

Modified: 
    llvm/lib/TargetParser/Host.cpp

Removed: 
    


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diff  --git a/llvm/lib/TargetParser/Host.cpp b/llvm/lib/TargetParser/Host.cpp
index 2e08c7b12d9d5d..32941c013c66ef 100644
--- a/llvm/lib/TargetParser/Host.cpp
+++ b/llvm/lib/TargetParser/Host.cpp
@@ -1524,7 +1524,8 @@ StringRef sys::getHostCPUName() {
   // Use processor id to detect cpu name.
   uint32_t processor_id;
   __asm__("cpucfg %[prid], $zero\n\t" : [prid] "=r"(processor_id));
-  switch (processor_id & 0xff00) {
+  // Refer PRID_SERIES_MASK in linux kernel: arch/loongarch/include/asm/cpu.h.
+  switch (processor_id & 0xf000) {
   case 0xc000: // Loongson 64bit, 4-issue
     return "la464";
   // TODO: Others.