diff --git a/mlir/lib/Conversion/StandardToSPIRV/ConvertStandardToSPIRV.cpp b/mlir/lib/Conversion/StandardToSPIRV/ConvertStandardToSPIRV.cpp
--- a/mlir/lib/Conversion/StandardToSPIRV/ConvertStandardToSPIRV.cpp
+++ b/mlir/lib/Conversion/StandardToSPIRV/ConvertStandardToSPIRV.cpp
@@ -770,6 +770,8 @@
       CmpFOpPattern, CmpIOpPattern, IntLoadOpPattern, LoadOpPattern,
       ReturnOpPattern, SelectOpPattern, StoreOpPattern,
       TypeCastingOpPattern<SIToFPOp, spirv::ConvertSToFOp>,
+      TypeCastingOpPattern<ZeroExtendIOp, spirv::UConvertOp>,
+      TypeCastingOpPattern<TruncateIOp, spirv::SConvertOp>,
       TypeCastingOpPattern<FPExtOp, spirv::FConvertOp>,
       TypeCastingOpPattern<FPTruncOp, spirv::FConvertOp>, XOrOpPattern>(
       context, typeConverter);
diff --git a/mlir/test/Conversion/StandardToSPIRV/std-ops-to-spirv.mlir b/mlir/test/Conversion/StandardToSPIRV/std-ops-to-spirv.mlir
--- a/mlir/test/Conversion/StandardToSPIRV/std-ops-to-spirv.mlir
+++ b/mlir/test/Conversion/StandardToSPIRV/std-ops-to-spirv.mlir
@@ -501,6 +501,34 @@
   return %0 : f64
 }
 
+// CHECK-LABEL: @zexti1
+func @zexti1(%arg0: i16) -> i64 {
+  // CHECK: spv.UConvert %{{.*}} : i16 to i64
+  %0 = std.zexti %arg0 : i16 to i64
+  return %0 : i64
+}
+
+// CHECK-LABEL: @zexti2
+func @zexti2(%arg0 : i32) -> i64 {
+  // CHECK: spv.UConvert %{{.*}} : i32 to i64
+  %0 = std.zexti %arg0 : i32 to i64
+  return %0 : i64
+}
+
+// CHECK-LABEL: @trunci1
+func @trunci1(%arg0 : i64) -> i16 {
+  // CHECK: spv.SConvert %{{.*}} : i64 to i16
+  %0 = std.trunci %arg0 : i64 to i16
+  return %0 : i16
+}
+
+// CHECK-LABEL: @trunci2
+func @trunci2(%arg0: i32) -> i16 {
+  // CHECK: spv.SConvert %{{.*}} : i32 to i16
+  %0 = std.trunci %arg0 : i32 to i16
+  return %0 : i16
+}
+
 } // end module
 
 // -----