1 files changed, 24 insertions, 0 deletions
diff --git a/llvm/lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp b/llvm/lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp
index 9a0e4a39d31..e1de580437e 100644
--- a/llvm/lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp
+++ b/llvm/lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp
@@ -911,6 +911,10 @@ public:
     return !isVI();
   }
 
+  bool hasIntClamp() const {
+    return getFeatureBits()[AMDGPU::FeatureIntClamp];
+  }
+
   AMDGPUTargetStreamer &getTargetStreamer() {
     MCTargetStreamer &TS = *getParser().getStreamer().getTargetStreamer();
     return static_cast<AMDGPUTargetStreamer &>(TS);
@@ -1011,6 +1015,7 @@ private:
   bool validateInstruction(const MCInst &Inst, const SMLoc &IDLoc);
   bool validateConstantBusLimitations(const MCInst &Inst);
   bool validateEarlyClobberLimitations(const MCInst &Inst);
+  bool validateIntClampSupported(const MCInst &Inst);
   bool usesConstantBus(const MCInst &Inst, unsigned OpIdx);
   bool isInlineConstant(const MCInst &Inst, unsigned OpIdx) const;
   unsigned findImplicitSGPRReadInVOP(const MCInst &Inst) const;
@@ -2199,6 +2204,20 @@ bool AMDGPUAsmParser::validateEarlyClobberLimitations(const MCInst &Inst) {
   return true;
 }
 
+bool AMDGPUAsmParser::validateIntClampSupported(const MCInst &Inst) {
+
+  const unsigned Opc = Inst.getOpcode();
+  const MCInstrDesc &Desc = MII.get(Opc);
+
+  if ((Desc.TSFlags & SIInstrFlags::IntClamp) != 0 && !hasIntClamp()) {
+    int ClampIdx = AMDGPU::getNamedOperandIdx(Opc, AMDGPU::OpName::clamp);
+    assert(ClampIdx != -1);
+    return Inst.getOperand(ClampIdx).getImm() == 0;
+  }
+
+  return true;
+}
+
 bool AMDGPUAsmParser::validateInstruction(const MCInst &Inst,
                                           const SMLoc &IDLoc) {
   if (!validateConstantBusLimitations(Inst)) {
@@ -2211,6 +2230,11 @@ bool AMDGPUAsmParser::validateInstruction(const MCInst &Inst,
       "destination must be different than all sources");
     return false;
   }
+  if (!validateIntClampSupported(Inst)) {
+    Error(IDLoc,
+      "integer clamping is not supported on this GPU");
+    return false;
+  }
 
   return true;
 }