[clang] [compiler-rt] [llvm] [X86] Hygon Processors Initial enablement (PR #187622)

Xiaomeng Zhang via cfe-commits cfe-commits at lists.llvm.org
Wed Mar 25 23:48:06 PDT 2026


================
@@ -1661,6 +1661,84 @@ def ProcessorFeatures {
                                                   ];
   list<SubtargetFeature> ZN6Features =
     !listconcat(ZN5Features, ZN6AdditionalFeatures);
+
+  // Hygon Processors common ISAs
+  list<SubtargetFeature> C864GM4Features = [FeatureADX,
+                                            FeatureAES,
+                                            FeatureAVX2,
+                                            FeatureBMI,
+                                            FeatureBMI2,
+                                            FeatureCLFLUSHOPT,
+                                            FeatureCLZERO,
+                                            FeatureCMOV,
+                                            FeatureCRC32,
+                                            FeatureCX16,
+                                            FeatureF16C,
+                                            FeatureFMA,
+                                            FeatureFSGSBase,
+                                            FeatureFXSR,
+                                            FeatureLAHFSAHF64,
+                                            FeatureLZCNT,
+                                            FeatureMMX,
+                                            FeatureMOVBE,
+                                            FeatureMWAITX,
+                                            FeatureNOPL,
+                                            FeaturePCLMUL,
+                                            FeaturePOPCNT,
+                                            FeaturePRFCHW,
+                                            FeatureRDRAND,
+                                            FeatureRDSEED,
+                                            FeatureSHA,
+                                            FeatureSSE4A,
+                                            FeatureX86_64,
+                                            FeatureX87,
+                                            FeatureXSAVE,
+                                            FeatureXSAVEC,
+                                            FeatureXSAVEOPT,
+                                            FeatureXSAVES];
+  list<SubtargetFeature> C864GM4Tuning = [TuningFastLZCNT,
+                                          TuningFastBEXTR,
+                                          TuningFast15ByteNOP,
+                                          TuningFastScalarFSQRT,
+                                          TuningFastVectorFSQRT,
+                                          TuningFastScalarShiftMasks,
+                                          TuningFastVariablePerLaneShuffle,
+                                          TuningFastMOVBE,
+                                          TuningFastImm16,
+                                          TuningSlowDivide64,
+                                          TuningSlowSHLD,
+                                          TuningSBBDepBreaking,
+                                          TuningInsertVZEROUPPER,
+                                          TuningAllowLight256Bit];
+
+  // C86-4G-M6
----------------
zhangxiaomeng-hygon wrote:

Thanks for the suggestion. In fact, we are planning to add some supports for the M4/M6/M7 microarchitecture features.

https://github.com/llvm/llvm-project/pull/187622


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