diff --git a/mlir/include/mlir/Dialect/SPIRV/IR/SPIRVOCLOps.td b/mlir/include/mlir/Dialect/SPIRV/IR/SPIRVOCLOps.td
--- a/mlir/include/mlir/Dialect/SPIRV/IR/SPIRVOCLOps.td
+++ b/mlir/include/mlir/Dialect/SPIRV/IR/SPIRVOCLOps.td
@@ -110,36 +110,6 @@
 }
 
 
-// -----
-
-def SPV_OCLFmaOp : SPV_OCLTernaryArithmeticOp<"fma", 26, SPV_Float> {
-  let summary = [{
-    Compute the correctly rounded floating-point representation of the sum
-    of c with the infinitely precise product of a and b. Rounding of
-    intermediate products shall not occur. Edge case results are per the
-    IEEE 754-2008 standard.
-  }];
-
-  let description = [{
-    Result Type, a, b and c must be floating-point or vector(2,3,4,8,16) of
-    floating-point values.
-
-    All of the operands, including the Result Type operand, must be of the
-    same type.
-
-    <!-- End of AutoGen section -->
-
-    ```
-    fma-op ::= ssa-id `=` `spv.OCL.fma` ssa-use, ssa-use, ssa-use `:`
-               float-scalar-vector-type
-    ```mlir
-
-    ```
-    %0 = spv.OCL.fma %a, %b, %c : f32
-    %1 = spv.OCL.fma %a, %b, %c : vector<3xf16>
-    ```
-  }];
-}
 
 // -----
 
@@ -331,6 +301,37 @@
 
 // -----
 
+def SPV_OCLFmaOp : SPV_OCLTernaryArithmeticOp<"fma", 26, SPV_Float> {
+  let summary = [{
+    Compute the correctly rounded floating-point representation of the sum
+    of c with the infinitely precise product of a and b. Rounding of
+    intermediate products shall not occur. Edge case results are per the
+    IEEE 754-2008 standard.
+  }];
+
+  let description = [{
+    Result Type, a, b and c must be floating-point or vector(2,3,4,8,16) of
+    floating-point values.
+
+    All of the operands, including the Result Type operand, must be of the
+    same type.
+
+    <!-- End of AutoGen section -->
+
+    ```
+    fma-op ::= ssa-id `=` `spv.OCL.fma` ssa-use, ssa-use, ssa-use `:`
+               float-scalar-vector-type
+    ```mlir
+
+    ```
+    %0 = spv.OCL.fma %a, %b, %c : f32
+    %1 = spv.OCL.fma %a, %b, %c : vector<3xf16>
+    ```
+  }];
+}
+
+// -----
+
 def SPV_OCLLogOp : SPV_OCLUnaryArithmeticOp<"log", 37, SPV_Float> {
   let summary = "Compute the natural logarithm of x.";
 
@@ -392,6 +393,38 @@
 
 // -----
 
+def SPV_OCLRoundOp : SPV_OCLUnaryArithmeticOp<"round", 55, SPV_Float> {
+  let summary = [{
+    Return the integral value nearest to x rounding halfway cases away from
+    zero, regardless of the current rounding direction.
+  }];
+
+  let description = [{
+    Result Type and x must be floating-point or vector(2,3,4,8,16) of
+    floating-point values.
+
+    All of the operands, including the Result Type operand, must be of the
+    same type.
+
+    <!-- End of AutoGen section -->
+
+    ```
+    float-scalar-vector-type ::= float-type |
+                                 `vector<` integer-literal `x` float-type `>`
+    round-op ::= ssa-id `=` `spv.OCL.round` ssa-use `:`
+               float-scalar-vector-type
+    ```
+    #### Example:
+
+    ```mlir
+    %2 = spv.OCL.round %0 : f32
+    %3 = spv.OCL.round %0 : vector<3xf16>
+    ```
+  }];
+}
+
+// -----
+
 def SPV_OCLRsqrtOp : SPV_OCLUnaryArithmeticOp<"rsqrt", 56, SPV_Float> {
   let summary = "Compute inverse square root of x.";
 
diff --git a/mlir/lib/Conversion/MathToSPIRV/MathToSPIRV.cpp b/mlir/lib/Conversion/MathToSPIRV/MathToSPIRV.cpp
--- a/mlir/lib/Conversion/MathToSPIRV/MathToSPIRV.cpp
+++ b/mlir/lib/Conversion/MathToSPIRV/MathToSPIRV.cpp
@@ -16,6 +16,7 @@
 #include "mlir/Dialect/SPIRV/IR/SPIRVOps.h"
 #include "mlir/Dialect/SPIRV/Transforms/SPIRVConversion.h"
 #include "mlir/IR/BuiltinTypes.h"
+#include "mlir/IR/TypeUtilities.h"
 #include "mlir/Transforms/DialectConversion.h"
 #include "llvm/Support/Debug.h"
 
@@ -233,6 +234,43 @@
   }
 };
 
+/// Converts math.round to GLSL SPIRV extended ops.
+struct RoundOpPattern final : public OpConversionPattern<math::RoundOp> {
+  using OpConversionPattern::OpConversionPattern;
+
+  LogicalResult
+  matchAndRewrite(math::RoundOp roundOp, OpAdaptor adaptor,
+                  ConversionPatternRewriter &rewriter) const override {
+    Location loc = roundOp.getLoc();
+    auto operand = roundOp.getOperand();
+    auto ty = operand.getType();
+    auto ety = getElementTypeOrSelf(ty);
+
+    auto zero = spirv::ConstantOp::getZero(ty, loc, rewriter);
+    auto one = spirv::ConstantOp::getOne(ty, loc, rewriter);
+    Value half;
+    if (VectorType vty = ty.dyn_cast<VectorType>()) {
+      half = rewriter.create<spirv::ConstantOp>(
+          loc, vty,
+          DenseElementsAttr::get(vty,
+                                 rewriter.getFloatAttr(ety, 0.5).getValue()));
+    } else {
+      half = rewriter.create<spirv::ConstantOp>(
+          loc, ty, rewriter.getFloatAttr(ety, 0.5));
+    }
+
+    auto abs = rewriter.create<spirv::GLSLFAbsOp>(loc, operand);
+    auto floor = rewriter.create<spirv::GLSLFloorOp>(loc, abs);
+    auto sub = rewriter.create<spirv::FSubOp>(loc, abs, floor);
+    auto greater =
+        rewriter.create<spirv::FOrdGreaterThanEqualOp>(loc, sub, half);
+    auto select = rewriter.create<spirv::SelectOp>(loc, greater, one, zero);
+    auto add = rewriter.create<spirv::FAddOp>(loc, floor, select);
+    rewriter.replaceOpWithNewOp<math::CopySignOp>(roundOp, add, operand);
+    return success();
+  }
+};
+
 } // namespace
 
 //===----------------------------------------------------------------------===//
@@ -248,7 +286,7 @@
   // GLSL patterns
   patterns
       .add<CountLeadingZerosPattern, Log1pOpPattern<spirv::GLSLLogOp>,
-           ExpM1OpPattern<spirv::GLSLExpOp>, PowFOpPattern,
+           ExpM1OpPattern<spirv::GLSLExpOp>, PowFOpPattern, RoundOpPattern,
            spirv::ElementwiseOpPattern<math::AbsOp, spirv::GLSLFAbsOp>,
            spirv::ElementwiseOpPattern<math::CeilOp, spirv::GLSLCeilOp>,
            spirv::ElementwiseOpPattern<math::CosOp, spirv::GLSLCosOp>,
@@ -273,6 +311,7 @@
                spirv::ElementwiseOpPattern<math::FmaOp, spirv::OCLFmaOp>,
                spirv::ElementwiseOpPattern<math::LogOp, spirv::OCLLogOp>,
                spirv::ElementwiseOpPattern<math::PowFOp, spirv::OCLPowOp>,
+               spirv::ElementwiseOpPattern<math::RoundOp, spirv::OCLRoundOp>,
                spirv::ElementwiseOpPattern<math::RsqrtOp, spirv::OCLRsqrtOp>,
                spirv::ElementwiseOpPattern<math::SinOp, spirv::OCLSinOp>,
                spirv::ElementwiseOpPattern<math::SqrtOp, spirv::OCLSqrtOp>,
diff --git a/mlir/test/Conversion/MathToSPIRV/math-to-glsl-spirv.mlir b/mlir/test/Conversion/MathToSPIRV/math-to-glsl-spirv.mlir
--- a/mlir/test/Conversion/MathToSPIRV/math-to-glsl-spirv.mlir
+++ b/mlir/test/Conversion/MathToSPIRV/math-to-glsl-spirv.mlir
@@ -145,6 +145,38 @@
   return %0: vector<4xf32>
 }
 
+// CHECK-LABEL: @round_scalar
+func.func @round_scalar(%x: f32) -> f32 {
+  // CHECK: %[[ZERO:.+]] = spv.Constant 0.000000e+00
+  // CHECK: %[[ONE:.+]] = spv.Constant 1.000000e+00
+  // CHECK: %[[HALF:.+]] = spv.Constant 5.000000e-01
+  // CHECK: %[[ABS:.+]] = spv.GLSL.FAbs %arg0
+  // CHECK: %[[FLOOR:.+]] = spv.GLSL.Floor %[[ABS]]
+  // CHECK: %[[SUB:.+]] = spv.FSub %[[ABS]], %[[FLOOR]]
+  // CHECK: %[[GE:.+]] = spv.FOrdGreaterThanEqual %[[SUB]], %[[HALF]]
+  // CHECK: %[[SEL:.+]] = spv.Select %[[GE]], %[[ONE]], %[[ZERO]]
+  // CHECK: %[[ADD:.+]] = spv.FAdd %[[FLOOR]], %[[SEL]]
+  // CHECK: %[[BITCAST:.+]] = spv.Bitcast %[[ADD]]
+  %0 = math.round %x : f32
+  return %0: f32
+}
+
+// CHECK-LABEL: @round_vector
+func.func @round_vector(%x: vector<4xf32>) -> vector<4xf32> {
+  // CHECK: %[[ZERO:.+]] = spv.Constant dense<0.000000e+00>
+  // CHECK: %[[ONE:.+]] = spv.Constant dense<1.000000e+00>
+  // CHECK: %[[HALF:.+]] = spv.Constant dense<5.000000e-01>
+  // CHECK: %[[ABS:.+]] = spv.GLSL.FAbs %arg0
+  // CHECK: %[[FLOOR:.+]] = spv.GLSL.Floor %[[ABS]]
+  // CHECK: %[[SUB:.+]] = spv.FSub %[[ABS]], %[[FLOOR]]
+  // CHECK: %[[GE:.+]] = spv.FOrdGreaterThanEqual %[[SUB]], %[[HALF]]
+  // CHECK: %[[SEL:.+]] = spv.Select %[[GE]], %[[ONE]], %[[ZERO]]
+  // CHECK: %[[ADD:.+]] = spv.FAdd %[[FLOOR]], %[[SEL]]
+  // CHECK: %[[BITCAST:.+]] = spv.Bitcast %[[ADD]]
+  %0 = math.round %x : vector<4xf32>
+  return %0: vector<4xf32>
+}
+
 } // end module
 
 // -----
diff --git a/mlir/test/Conversion/MathToSPIRV/math-to-opencl-spirv.mlir b/mlir/test/Conversion/MathToSPIRV/math-to-opencl-spirv.mlir
--- a/mlir/test/Conversion/MathToSPIRV/math-to-opencl-spirv.mlir
+++ b/mlir/test/Conversion/MathToSPIRV/math-to-opencl-spirv.mlir
@@ -34,6 +34,8 @@
   %11 = math.floor %arg0 : f32
   // CHECK: spv.OCL.erf %{{.*}}: f32
   %12 = math.erf %arg0 : f32
+  // CHECK: spv.OCL.round %{{.*}}: f32
+  %13 = math.round %arg0 : f32
   return
 }