diff --git a/mlir/include/mlir/Dialect/LLVMIR/LLVMOps.td b/mlir/include/mlir/Dialect/LLVMIR/LLVMOps.td
--- a/mlir/include/mlir/Dialect/LLVMIR/LLVMOps.td
+++ b/mlir/include/mlir/Dialect/LLVMIR/LLVMOps.td
@@ -843,6 +843,7 @@
 def LLVM_Exp2Op : LLVM_UnaryIntrinsicOp<"exp2">;
 def LLVM_FAbsOp : LLVM_UnaryIntrinsicOp<"fabs">;
 def LLVM_FCeilOp : LLVM_UnaryIntrinsicOp<"ceil">;
+def LLVM_FFloorOp : LLVM_UnaryIntrinsicOp<"floor">;
 def LLVM_FMAOp : LLVM_TernarySameArgsIntrinsicOp<"fma">;
 def LLVM_FMulAddOp : LLVM_TernarySameArgsIntrinsicOp<"fmuladd">;
 def LLVM_Log10Op : LLVM_UnaryIntrinsicOp<"log10">;
diff --git a/mlir/lib/Conversion/SPIRVToLLVM/ConvertSPIRVToLLVM.cpp b/mlir/lib/Conversion/SPIRVToLLVM/ConvertSPIRVToLLVM.cpp
--- a/mlir/lib/Conversion/SPIRVToLLVM/ConvertSPIRVToLLVM.cpp
+++ b/mlir/lib/Conversion/SPIRVToLLVM/ConvertSPIRVToLLVM.cpp
@@ -1103,6 +1103,7 @@
       DirectConversionPattern<spirv::GLSLCosOp, LLVM::CosOp>,
       DirectConversionPattern<spirv::GLSLExpOp, LLVM::ExpOp>,
       DirectConversionPattern<spirv::GLSLFAbsOp, LLVM::FAbsOp>,
+      DirectConversionPattern<spirv::GLSLFloorOp, LLVM::FFloorOp>,
       DirectConversionPattern<spirv::GLSLLogOp, LLVM::LogOp>,
       DirectConversionPattern<spirv::GLSLSinOp, LLVM::SinOp>,
       DirectConversionPattern<spirv::GLSLSqrtOp, LLVM::SqrtOp>,
diff --git a/mlir/test/Conversion/SPIRVToLLVM/glsl-ops-to-llvm.mlir b/mlir/test/Conversion/SPIRVToLLVM/glsl-ops-to-llvm.mlir
--- a/mlir/test/Conversion/SPIRVToLLVM/glsl-ops-to-llvm.mlir
+++ b/mlir/test/Conversion/SPIRVToLLVM/glsl-ops-to-llvm.mlir
@@ -48,6 +48,19 @@
 	return
 }
 
+//===----------------------------------------------------------------------===//
+// spv.GLSL.Floor
+//===----------------------------------------------------------------------===//
+
+// CHECK-LABEL: @floor
+func @floor(%arg0: f32, %arg1: vector<3xf16>) {
+	// CHECK: "llvm.intr.floor"(%{{.*}}) : (!llvm.float) -> !llvm.float
+	%0 = spv.GLSL.Floor %arg0 : f32
+	// CHECK: "llvm.intr.floor"(%{{.*}}) : (!llvm<"<3 x half>">) -> !llvm<"<3 x half>">
+	%1 = spv.GLSL.Floor %arg1 : vector<3xf16>
+	return
+}
+
 //===----------------------------------------------------------------------===//
 // spv.GLSL.Log
 //===----------------------------------------------------------------------===//
diff --git a/mlir/test/Target/llvmir-intrinsics.mlir b/mlir/test/Target/llvmir-intrinsics.mlir
--- a/mlir/test/Target/llvmir-intrinsics.mlir
+++ b/mlir/test/Target/llvmir-intrinsics.mlir
@@ -90,6 +90,15 @@
   llvm.return
 }
 
+// CHECK-LABEL: @floor_test
+llvm.func @floor_test(%arg0: !llvm.float, %arg1: !llvm<"<8 x float>">) {
+  // CHECK: call float @llvm.floor.f32
+  "llvm.intr.floor"(%arg0) : (!llvm.float) -> !llvm.float
+  // CHECK: call <8 x float> @llvm.floor.v8f32
+  "llvm.intr.floor"(%arg1) : (!llvm<"<8 x float>">) -> !llvm<"<8 x float>">
+  llvm.return
+}
+
 // CHECK-LABEL: @cos_test
 llvm.func @cos_test(%arg0: !llvm.float, %arg1: !llvm<"<8 x float>">) {
   // CHECK: call float @llvm.cos.f32