AMDGPU: Add VOP3P instruction format

Add a few non-VOP3P but instructions related to packed.

Includes hack with dummy operands for the benefit of the assembler

llvm-svn: 296368

Author: arsenm

llvm/lib/Target/AMDGPU/AMDGPU.td

@@ -190,6 +190,12 @@ def Feature16BitInsts : SubtargetFeature<"16-bit-insts",
   "Has i16/f16 instructions"
 >;
 
+def FeatureVOP3P : SubtargetFeature<"vop3p",
+  "HasVOP3PInsts",
+  "true",
+  "Has VOP3P packed instructions"
+>;
+
 def FeatureMovrel : SubtargetFeature<"movrel",
   "HasMovrel",
   "true",
@@ -400,7 +406,7 @@ def FeatureGFX9 : SubtargetFeatureGeneration<"GFX9",
    FeatureWavefrontSize64, FeatureFlatAddressSpace, FeatureGCN,
    FeatureGCN3Encoding, FeatureCIInsts, Feature16BitInsts,
    FeatureSMemRealTime, FeatureScalarStores, FeatureInv2PiInlineImm,
-   FeatureApertureRegs, FeatureGFX9Insts
+   FeatureApertureRegs, FeatureGFX9Insts, FeatureVOP3P
   ]
 >;
 
@@ -575,7 +581,10 @@ def isCIVI : Predicate <
 
 def HasFlatAddressSpace : Predicate<"Subtarget->hasFlatAddressSpace()">;
 
-def Has16BitInsts : Predicate<"Subtarget->has16BitInsts()">;
+def Has16BitInsts : Predicate<"Subtarget->has16BitInsts()">,
+  AssemblerPredicate<"Feature16BitInsts">;
+def HasVOP3PInsts : Predicate<"Subtarget->hasVOP3PInsts()">,
+  AssemblerPredicate<"FeatureVOP3P">;
 
 def HasSDWA : Predicate<"Subtarget->hasSDWA()">,
   AssemblerPredicate<"FeatureSDWA">;

llvm/lib/Target/AMDGPU/AMDGPUSubtarget.cpp

@@ -117,6 +117,7 @@ AMDGPUSubtarget::AMDGPUSubtarget(const Triple &TT, StringRef GPU, StringRef FS,
     SGPRInitBug(false),
     HasSMemRealTime(false),
     Has16BitInsts(false),
+    HasVOP3PInsts(false),
     HasMovrel(false),
     HasVGPRIndexMode(false),
     HasScalarStores(false),

llvm/lib/Target/AMDGPU/AMDGPUSubtarget.h

@@ -136,6 +136,7 @@ class AMDGPUSubtarget : public AMDGPUGenSubtargetInfo {
   bool SGPRInitBug;
   bool HasSMemRealTime;
   bool Has16BitInsts;
+  bool HasVOP3PInsts;
   bool HasMovrel;
   bool HasVGPRIndexMode;
   bool HasScalarStores;
@@ -216,6 +217,10 @@ class AMDGPUSubtarget : public AMDGPUGenSubtargetInfo {
     return Has16BitInsts;
   }
 
+  bool hasVOP3PInsts() const {
+    return HasVOP3PInsts;
+  }
+
   bool hasHWFP64() const {
     return FP64;
   }