[AMDGPU] gfx1010 disassembler changes for wave32

[rampitec]

Summary

Yet another independent part of D63204.

[msearles]

LGTM

lib/Target/AMDGPU/Disassembler/AMDGPUDisassembler.h

public:
   MCOperand decodeSpecialReg32(unsigned Val) const;
   MCOperand decodeSpecialReg64(unsigned Val) const;
 
   MCOperand decodeSDWASrc(const OpWidthTy Width, unsigned Val) const;
   MCOperand decodeSDWASrc16(unsigned Val) const;
   MCOperand decodeSDWASrc32(unsigned Val) const;
   MCOperand decodeSDWAVopcDst(unsigned Val) const;
 
+  MCOperand decodeBoolReg(unsigned Val) const;
+
   int getTTmpIdx(unsigned Val) const;
 
   bool isVI() const;
   bool isGFX9() const;
   bool isGFX10() const;
 };
 
 //===----------------------------------------------------------------------===//

lib/Target/AMDGPU/Disassembler/AMDGPUDisassembler.cpp

 
 MCOperand AMDGPUDisassembler::decodeSDWAVopcDst(unsigned Val) const {
   using namespace AMDGPU::SDWA;
 
   assert((STI.getFeatureBits()[AMDGPU::FeatureGFX9] ||
           STI.getFeatureBits()[AMDGPU::FeatureGFX10]) &&
          "SDWAVopcDst should be present only on GFX9+");
 
+  bool IsWave64 = STI.getFeatureBits()[AMDGPU::FeatureWavefrontSize64];
+
   if (Val & SDWA9EncValues::VOPC_DST_VCC_MASK) {
     Val &= SDWA9EncValues::VOPC_DST_SGPR_MASK;
 
     int TTmpIdx = getTTmpIdx(Val);
     if (TTmpIdx >= 0) {
       return createSRegOperand(getTtmpClassId(OPW64), TTmpIdx);
     } else if (Val > SGPR_MAX) {
-      return decodeSpecialReg64(Val);
+      return IsWave64 ? decodeSpecialReg64(Val)
+                      : decodeSpecialReg32(Val);
     } else {
-      return createSRegOperand(getSgprClassId(OPW64), Val);
+      return createSRegOperand(getSgprClassId(IsWave64 ? OPW64 : OPW32), Val);
     }
   } else {
-    return createRegOperand(AMDGPU::VCC);
+    return createRegOperand(IsWave64 ? AMDGPU::VCC : AMDGPU::VCC_LO);
   }
 }
 
+MCOperand AMDGPUDisassembler::decodeBoolReg(unsigned Val) const {
+  return STI.getFeatureBits()[AMDGPU::FeatureWavefrontSize64] ?
+    decodeOperand_SReg_64(Val) : decodeOperand_SReg_32(Val);
+}
+
 bool AMDGPUDisassembler::isVI() const {
   return STI.getFeatureBits()[AMDGPU::FeatureVolcanicIslands];
 }
 
 bool AMDGPUDisassembler::isGFX9() const {
   return STI.getFeatureBits()[AMDGPU::FeatureGFX9];
 }