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
@@ -870,6 +870,7 @@
       TypeCastingOpPattern<SIToFPOp, spirv::ConvertSToFOp>,
       TypeCastingOpPattern<ZeroExtendIOp, spirv::UConvertOp>,
       TypeCastingOpPattern<TruncateIOp, spirv::SConvertOp>,
+      TypeCastingOpPattern<FPToSIOp, spirv::ConvertFToSOp>,
       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
@@ -531,6 +531,20 @@
   return %0 : i16
 }
 
+// CHECK-LABEL: @fptosi1
+func @fptosi1(%arg0 : f32) -> i32 {
+  // CHECK: spv.ConvertFToS %{{.*}} : f32 to i32
+  %0 = std.fptosi %arg0 : f32 to i32
+  return %0 : i32
+}
+
+// CHECK-LABEL: @fptosi2
+func @fptosi2(%arg0 : f16) -> i16 {
+  // CHECK: spv.ConvertFToS %{{.*}} : f16 to i16
+  %0 = std.fptosi %arg0 : f16 to i16
+  return %0 : i16
+}
+
 } // end module
 
 // -----