[AArch64] Add 0-cycle copy subtarget features for FPR64, FPR32 reg classes

This change adds 2 new subtarget features to AArch64 to model 0-cycle copy execution for FPR64 and FPR32 register classes. It also adds the new `HasZeroCycleRegMovFPR64` feature to Apple processors.

Author: tomershafir

llvm/lib/Target/AArch64/AArch64Features.td

@@ -612,6 +612,12 @@ def FeatureNoSVEFPLD1R : SubtargetFeature<"no-sve-fp-ld1r",
 def FeatureZCRegMove : SubtargetFeature<"zcm", "HasZeroCycleRegMove", "true",
                                         "Has zero-cycle register moves">;
 
+def FeatureZCRegMoveFPR64 : SubtargetFeature<"zcm-fpr64", "HasZeroCycleRegMoveFPR64", "true",
+                                        "Has zero-cycle register moves for FPR64 registers">;
+
+def FeatureZCRegMoveFPR32 : SubtargetFeature<"zcm-fpr32", "HasZeroCycleRegMoveFPR32", "true",
+                                        "Has zero-cycle register moves for FPR32 registers">;
+
 def FeatureZCZeroingGP : SubtargetFeature<"zcz-gp", "HasZeroCycleZeroingGP", "true",
                                         "Has zero-cycle zeroing instructions for generic registers">;
 

llvm/lib/Target/AArch64/AArch64Processors.td

@@ -312,6 +312,7 @@ def TuneAppleA7  : SubtargetFeature<"apple-a7", "ARMProcFamily", "AppleA7",
                                     FeatureFuseAES, FeatureFuseCryptoEOR,
                                     FeatureStorePairSuppress,
                                     FeatureZCRegMove,
+                                    FeatureZCRegMoveFPR64,
                                     FeatureZCZeroing,
                                     FeatureZCZeroingFPWorkaround]>;
 
@@ -325,6 +326,7 @@ def TuneAppleA10 : SubtargetFeature<"apple-a10", "ARMProcFamily", "AppleA10",
                                     FeatureFuseCryptoEOR,
                                     FeatureStorePairSuppress,
                                     FeatureZCRegMove,
+                                    FeatureZCRegMoveFPR64,
                                     FeatureZCZeroing]>;
 
 def TuneAppleA11 : SubtargetFeature<"apple-a11", "ARMProcFamily", "AppleA11",
@@ -337,6 +339,7 @@ def TuneAppleA11 : SubtargetFeature<"apple-a11", "ARMProcFamily", "AppleA11",
                                     FeatureFuseCryptoEOR,
                                     FeatureStorePairSuppress,
                                     FeatureZCRegMove,
+                                    FeatureZCRegMoveFPR64,
                                     FeatureZCZeroing]>;
 
 def TuneAppleA12 : SubtargetFeature<"apple-a12", "ARMProcFamily", "AppleA12",
@@ -349,6 +352,7 @@ def TuneAppleA12 : SubtargetFeature<"apple-a12", "ARMProcFamily", "AppleA12",
                                     FeatureFuseCryptoEOR,
                                     FeatureStorePairSuppress,
                                     FeatureZCRegMove,
+                                    FeatureZCRegMoveFPR64,
                                     FeatureZCZeroing]>;
 
 def TuneAppleA13 : SubtargetFeature<"apple-a13", "ARMProcFamily", "AppleA13",
@@ -361,6 +365,7 @@ def TuneAppleA13 : SubtargetFeature<"apple-a13", "ARMProcFamily", "AppleA13",
                                     FeatureFuseCryptoEOR,
                                     FeatureStorePairSuppress,
                                     FeatureZCRegMove,
+                                    FeatureZCRegMoveFPR64,
                                     FeatureZCZeroing]>;
 
 def TuneAppleA14 : SubtargetFeature<"apple-a14", "ARMProcFamily", "AppleA14",
@@ -378,6 +383,7 @@ def TuneAppleA14 : SubtargetFeature<"apple-a14", "ARMProcFamily", "AppleA14",
                                     FeatureFuseLiterals,
                                     FeatureStorePairSuppress,
                                     FeatureZCRegMove,
+                                    FeatureZCRegMoveFPR64,
                                     FeatureZCZeroing]>;
 
 def TuneAppleA15 : SubtargetFeature<"apple-a15", "ARMProcFamily", "AppleA15",
@@ -395,6 +401,7 @@ def TuneAppleA15 : SubtargetFeature<"apple-a15", "ARMProcFamily", "AppleA15",
                                     FeatureFuseLiterals,
                                     FeatureStorePairSuppress,
                                     FeatureZCRegMove,
+                                    FeatureZCRegMoveFPR64,
                                     FeatureZCZeroing]>;
 
 def TuneAppleA16 : SubtargetFeature<"apple-a16", "ARMProcFamily", "AppleA16",
@@ -412,6 +419,7 @@ def TuneAppleA16 : SubtargetFeature<"apple-a16", "ARMProcFamily", "AppleA16",
                                     FeatureFuseLiterals,
                                     FeatureStorePairSuppress,
                                     FeatureZCRegMove,
+                                    FeatureZCRegMoveFPR64,
                                     FeatureZCZeroing]>;
 
 def TuneAppleA17 : SubtargetFeature<"apple-a17", "ARMProcFamily", "AppleA17",
@@ -429,6 +437,7 @@ def TuneAppleA17 : SubtargetFeature<"apple-a17", "ARMProcFamily", "AppleA17",
                                     FeatureFuseLiterals,
                                     FeatureStorePairSuppress,
                                     FeatureZCRegMove,
+                                    FeatureZCRegMoveFPR64,
                                     FeatureZCZeroing]>;
 
 def TuneAppleM4 : SubtargetFeature<"apple-m4", "ARMProcFamily", "AppleM4",
@@ -445,6 +454,7 @@ def TuneAppleM4 : SubtargetFeature<"apple-m4", "ARMProcFamily", "AppleM4",
                                      FeatureFuseCryptoEOR,
                                      FeatureFuseLiterals,
                                      FeatureZCRegMove,
+                                     FeatureZCRegMoveFPR64,
                                      FeatureZCZeroing
                                      ]>;