Index: llvm/trunk/lib/Target/AMDGPU/Disassembler/AMDGPUDisassembler.h
===================================================================
--- llvm/trunk/lib/Target/AMDGPU/Disassembler/AMDGPUDisassembler.h
+++ llvm/trunk/lib/Target/AMDGPU/Disassembler/AMDGPUDisassembler.h
@@ -123,6 +123,8 @@
   MCOperand decodeSDWASrc32(unsigned Val) const;
   MCOperand decodeSDWAVopcDst(unsigned Val) const;
 
+  MCOperand decodeBoolReg(unsigned Val) const;
+
   int getTTmpIdx(unsigned Val) const;
 
   bool isVI() const;
Index: llvm/trunk/lib/Target/AMDGPU/Disassembler/AMDGPUDisassembler.cpp
===================================================================
--- llvm/trunk/lib/Target/AMDGPU/Disassembler/AMDGPUDisassembler.cpp
+++ llvm/trunk/lib/Target/AMDGPU/Disassembler/AMDGPUDisassembler.cpp
@@ -1039,6 +1039,8 @@
           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;
 
@@ -1046,15 +1048,21 @@
     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];
 }