diff --git a/tools/mutator-utils/mutator.cpp b/tools/mutator-utils/mutator.cpp
index 23243806c..a18283b99 100644
--- a/tools/mutator-utils/mutator.cpp
+++ b/tools/mutator-utils/mutator.cpp
@@ -499,9 +499,19 @@ llvm::Value *FunctionMutator::getRandomConstant(llvm::Type *ty) {
   }
 
   if (auto vecTy = llvm::dyn_cast<llvm::FixedVectorType>(ty);
-      vecTy && vecTy->getElementType()) {
+      vecTy && vecTy->getElementType()->isIntegerTy()) {
     return mutator_util::getRandomLLVMIntegerVector(vecTy);
   }
+
+  if (auto vecTy = llvm::dyn_cast<llvm::FixedVectorType>(ty);
+      vecTy && vecTy->getElementType()->isFloatTy()) {
+    return mutator_util::getRandomLLVMFloatVector(vecTy);
+  }
+
+  if (auto vecTy = llvm::dyn_cast<llvm::FixedVectorType>(ty);
+      vecTy && vecTy->getElementType()->isDoubleTy()) {
+    return mutator_util::getRandomLLVMDoubleVector(vecTy);
+  }
   return llvm::UndefValue::get(ty);
 }
 
diff --git a/tools/mutator-utils/util.cpp b/tools/mutator-utils/util.cpp
index ddc0d2a11..77ed0008d 100644
--- a/tools/mutator-utils/util.cpp
+++ b/tools/mutator-utils/util.cpp
@@ -180,6 +180,84 @@ mutator_util::getRandomLLVMIntegerVector(llvm::FixedVectorType *ty) {
   return llvm::ConstantVector::get(result);
 }
 
+llvm::Constant *
+mutator_util::getRandomLLVMFloatVector(llvm::FixedVectorType *ty) {
+  assert(ty->getElementType()->isFloatTy() && "expect a float vector");
+  llvm::Type *floatTy = llvm::Type::getFloatTy(ty->getContext());
+  unsigned length = ty->getNumElements();
+  llvm::SmallVector<llvm::Constant *> result;
+  for (size_t i = 0; i < length; ++i) {
+    result.push_back(llvm::ConstantFP::get(floatTy, getRandomLLVMFloat()));
+  }
+  // we set threshold to 5, if p is less than threshold , we assign poison to
+  // the vector
+  unsigned threshold = 5, p = Random::getRandomUnsigned() % 100;
+  if (p < threshold) {
+    unsigned poisonNum = Random::getRandomUnsigned(2) + 1;
+    poisonNum = std::min(poisonNum, length);
+    for (size_t times = 0; times < poisonNum; ++times) {
+      result[Random::getRandomUnsigned() % length] =
+          llvm::PoisonValue::get(floatTy);
+    }
+  }
+  return llvm::ConstantVector::get(result);
+}
+
+llvm::Constant *mutator_util::updateFloatVector(llvm::ConstantVector *ty) {
+  unsigned length = ty->getType()->getNumElements();
+  assert(ty->getType()->getElementType()->isFloatTy() &&
+         "only support for updating float type");
+  llvm::Type *floatTy = llvm::Type::getFloatTy(ty->getContext());
+  llvm::SmallVector<llvm::Constant *> result;
+  for (size_t i = 0; i < length; ++i) {
+    if (Random::getRandomBool()) {
+      result.push_back(llvm::ConstantFP::get(floatTy, getRandomLLVMFloat()));
+    } else {
+      result.push_back(ty->getAggregateElement(i));
+    }
+  }
+  return llvm::ConstantVector::get(result);
+}
+
+llvm::Constant *
+mutator_util::getRandomLLVMDoubleVector(llvm::FixedVectorType *ty) {
+  assert(ty->getElementType()->isDoubleTy() && "expect a double vector");
+  llvm::Type *doubleTy = llvm::Type::getDoubleTy(ty->getContext());
+  unsigned length = ty->getNumElements();
+  llvm::SmallVector<llvm::Constant *> result;
+  for (size_t i = 0; i < length; ++i) {
+    result.push_back(llvm::ConstantFP::get(doubleTy, getRandomLLVMDouble()));
+  }
+  // we set threshold to 5, if p is less than threshold , we assign poison to
+  // the vector
+  unsigned threshold = 5, p = Random::getRandomUnsigned() % 100;
+  if (p < threshold) {
+    unsigned poisonNum = Random::getRandomUnsigned(2) + 1;
+    poisonNum = std::min(poisonNum, length);
+    for (size_t times = 0; times < poisonNum; ++times) {
+      result[Random::getRandomUnsigned() % length] =
+          llvm::PoisonValue::get(doubleTy);
+    }
+  }
+  return llvm::ConstantVector::get(result);
+}
+
+llvm::Constant *mutator_util::updateDoubleVector(llvm::ConstantVector *ty) {
+  unsigned length = ty->getType()->getNumElements();
+  assert(ty->getType()->getElementType()->isDoubleTy() &&
+         "only support for updating double type");
+  llvm::Type *doubleTy = llvm::Type::getDoubleTy(ty->getContext());
+  llvm::SmallVector<llvm::Constant *> result;
+  for (size_t i = 0; i < length; ++i) {
+    if (Random::getRandomBool()) {
+      result.push_back(llvm::ConstantFP::get(doubleTy, getRandomLLVMDouble()));
+    } else {
+      result.push_back(ty->getAggregateElement(i));
+    }
+  }
+  return llvm::ConstantVector::get(result);
+}
+
 llvm::Constant *mutator_util::updateIntegerVector(llvm::ConstantVector *ty) {
   unsigned length = ty->getType()->getNumElements();
   assert(ty->getType()->getElementType()->isIntegerTy() &&
diff --git a/tools/mutator-utils/util.h b/tools/mutator-utils/util.h
index ef6f9df83..25300f555 100644
--- a/tools/mutator-utils/util.h
+++ b/tools/mutator-utils/util.h
@@ -342,4 +342,8 @@ class mutator_util {
   static llvm::ConstantRange getRandomLLVMConstantRange(llvm::IntegerType *ty);
   static llvm::Constant *getRandomLLVMIntegerVector(llvm::FixedVectorType *ty);
   static llvm::Constant *updateIntegerVector(llvm::ConstantVector *ty);
+  static llvm::Constant *getRandomLLVMFloatVector(llvm::FixedVectorType *ty);
+  static llvm::Constant *updateFloatVector(llvm::ConstantVector *ty);
+  static llvm::Constant *getRandomLLVMDoubleVector(llvm::FixedVectorType *ty);
+  static llvm::Constant *updateDoubleVector(llvm::ConstantVector *ty);
 };
\ No newline at end of file