diff --git a/build.vc9/mpir-tests.sln b/build.vc9/mpir-tests.sln
index dc35ac69..91b35a60 100644
--- a/build.vc9/mpir-tests.sln
+++ b/build.vc9/mpir-tests.sln
@@ -783,6 +783,8 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "mpn.dc_bdiv_qr", "mpir-test
 EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "mpn.dc_bdiv_qr_n", "mpir-tests\mpn.dc_bdiv_qr_n\mpn.dc_bdiv_qr_n.vcproj", "{7A0A0EA8-A660-4489-9AD3-754AC1D3A43A}"
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "mpn.gcdext", "mpir-tests\mpn.gcdext\mpn.gcdext.vcproj", "{832209A8-A81B-46CF-9F16-50A4302F5D04}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Win32 = Debug|Win32
@@ -1842,6 +1844,14 @@ Global
 		{7A0A0EA8-A660-4489-9AD3-754AC1D3A43A}.Release|Win32.Build.0 = Release|Win32
 		{7A0A0EA8-A660-4489-9AD3-754AC1D3A43A}.Release|x64.ActiveCfg = Release|x64
 		{7A0A0EA8-A660-4489-9AD3-754AC1D3A43A}.Release|x64.Build.0 = Release|x64
+		{832209A8-A81B-46CF-9F16-50A4302F5D04}.Debug|Win32.ActiveCfg = Debug|Win32
+		{832209A8-A81B-46CF-9F16-50A4302F5D04}.Debug|Win32.Build.0 = Debug|Win32
+		{832209A8-A81B-46CF-9F16-50A4302F5D04}.Debug|x64.ActiveCfg = Debug|x64
+		{832209A8-A81B-46CF-9F16-50A4302F5D04}.Debug|x64.Build.0 = Debug|x64
+		{832209A8-A81B-46CF-9F16-50A4302F5D04}.Release|Win32.ActiveCfg = Release|Win32
+		{832209A8-A81B-46CF-9F16-50A4302F5D04}.Release|Win32.Build.0 = Release|Win32
+		{832209A8-A81B-46CF-9F16-50A4302F5D04}.Release|x64.ActiveCfg = Release|x64
+		{832209A8-A81B-46CF-9F16-50A4302F5D04}.Release|x64.Build.0 = Release|x64
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
diff --git a/build.vc9/mpir-tests/mpn.gcdext/mpn.gcdext.vcproj b/build.vc9/mpir-tests/mpn.gcdext/mpn.gcdext.vcproj
new file mode 100644
index 00000000..5f9893ca
--- /dev/null
+++ b/build.vc9/mpir-tests/mpn.gcdext/mpn.gcdext.vcproj
@@ -0,0 +1,327 @@
+<?xml version="1.0" encoding="Windows-1252"?>
+<VisualStudioProject
+	ProjectType="Visual C++"
+	Version="9.00"
+	Name="mpn.gcdext"
+	ProjectGUID="{832209A8-A81B-46CF-9F16-50A4302F5D04}"
+	RootNamespace="mpn.gcdext"
+	Keyword="Win32Proj"
+	TargetFrameworkVersion="131072"
+	>
+	<Platforms>
+		<Platform
+			Name="Win32"
+		/>
+		<Platform
+			Name="x64"
+		/>
+	</Platforms>
+	<ToolFiles>
+	</ToolFiles>
+	<Configurations>
+		<Configuration
+			Name="Debug|Win32"
+			OutputDirectory="$(PlatformName)\$(ConfigurationName)"
+			IntermediateDirectory="$(PlatformName)\$(ConfigurationName)"
+			ConfigurationType="1"
+			InheritedPropertySheets="..\test-config.vsprops"
+			CharacterSet="0"
+			WholeProgramOptimization="0"
+			>
+			<Tool
+				Name="VCPreBuildEventTool"
+				CommandLine=""
+			/>
+			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"
+			/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+			/>
+			<Tool
+				Name="VCCLCompilerTool"
+				Optimization="0"
+				PreprocessorDefinitions="_DEBUG;_CONSOLE"
+				RuntimeLibrary="1"
+				UsePrecompiledHeader="0"
+				CompileAs="0"
+			/>
+			<Tool
+				Name="VCManagedResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCPreLinkEventTool"
+			/>
+			<Tool
+				Name="VCLinkerTool"
+				OutputFile="$(TestDir)$(OutDir)\$(ProjectName).exe"
+				SubSystem="1"
+				RandomizedBaseAddress="1"
+				DataExecutionPrevention="0"
+				TargetMachine="1"
+			/>
+			<Tool
+				Name="VCALinkTool"
+			/>
+			<Tool
+				Name="VCManifestTool"
+			/>
+			<Tool
+				Name="VCXDCMakeTool"
+			/>
+			<Tool
+				Name="VCBscMakeTool"
+			/>
+			<Tool
+				Name="VCFxCopTool"
+			/>
+			<Tool
+				Name="VCAppVerifierTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
+		</Configuration>
+		<Configuration
+			Name="Debug|x64"
+			OutputDirectory="$(PlatformName)\$(ConfigurationName)"
+			IntermediateDirectory="$(PlatformName)\$(ConfigurationName)"
+			ConfigurationType="1"
+			InheritedPropertySheets="..\test-config.vsprops"
+			CharacterSet="0"
+			WholeProgramOptimization="0"
+			>
+			<Tool
+				Name="VCPreBuildEventTool"
+				CommandLine=""
+			/>
+			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"
+			/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+				TargetEnvironment="3"
+			/>
+			<Tool
+				Name="VCCLCompilerTool"
+				Optimization="0"
+				PreprocessorDefinitions="_DEBUG;_CONSOLE"
+				RuntimeLibrary="1"
+				UsePrecompiledHeader="0"
+				CompileAs="0"
+			/>
+			<Tool
+				Name="VCManagedResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCPreLinkEventTool"
+			/>
+			<Tool
+				Name="VCLinkerTool"
+				OutputFile="$(TestDir)$(OutDir)\$(ProjectName).exe"
+				SubSystem="1"
+				RandomizedBaseAddress="1"
+				DataExecutionPrevention="0"
+				TargetMachine="17"
+			/>
+			<Tool
+				Name="VCALinkTool"
+			/>
+			<Tool
+				Name="VCManifestTool"
+			/>
+			<Tool
+				Name="VCXDCMakeTool"
+			/>
+			<Tool
+				Name="VCBscMakeTool"
+			/>
+			<Tool
+				Name="VCFxCopTool"
+			/>
+			<Tool
+				Name="VCAppVerifierTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
+		</Configuration>
+		<Configuration
+			Name="Release|Win32"
+			OutputDirectory="$(PlatformName)\$(ConfigurationName)"
+			IntermediateDirectory="$(PlatformName)\$(ConfigurationName)"
+			ConfigurationType="1"
+			InheritedPropertySheets="..\test-config.vsprops"
+			CharacterSet="0"
+			WholeProgramOptimization="0"
+			>
+			<Tool
+				Name="VCPreBuildEventTool"
+				CommandLine=""
+			/>
+			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"
+			/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+			/>
+			<Tool
+				Name="VCCLCompilerTool"
+				Optimization="3"
+				PreprocessorDefinitions="NDEBUG;_CONSOLE"
+				RuntimeLibrary="0"
+				UsePrecompiledHeader="0"
+				CompileAs="0"
+			/>
+			<Tool
+				Name="VCManagedResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCPreLinkEventTool"
+			/>
+			<Tool
+				Name="VCLinkerTool"
+				OutputFile="$(TestDir)$(OutDir)\$(ProjectName).exe"
+				SubSystem="1"
+				OptimizeReferences="2"
+				EnableCOMDATFolding="2"
+				RandomizedBaseAddress="1"
+				DataExecutionPrevention="0"
+				TargetMachine="1"
+			/>
+			<Tool
+				Name="VCALinkTool"
+			/>
+			<Tool
+				Name="VCManifestTool"
+			/>
+			<Tool
+				Name="VCXDCMakeTool"
+			/>
+			<Tool
+				Name="VCBscMakeTool"
+			/>
+			<Tool
+				Name="VCFxCopTool"
+			/>
+			<Tool
+				Name="VCAppVerifierTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
+		</Configuration>
+		<Configuration
+			Name="Release|x64"
+			OutputDirectory="$(PlatformName)\$(ConfigurationName)"
+			IntermediateDirectory="$(PlatformName)\$(ConfigurationName)"
+			ConfigurationType="1"
+			InheritedPropertySheets="..\test-config.vsprops"
+			CharacterSet="0"
+			WholeProgramOptimization="0"
+			>
+			<Tool
+				Name="VCPreBuildEventTool"
+				CommandLine=""
+			/>
+			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"
+			/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+				TargetEnvironment="3"
+			/>
+			<Tool
+				Name="VCCLCompilerTool"
+				Optimization="3"
+				PreprocessorDefinitions="NDEBUG;_CONSOLE"
+				RuntimeLibrary="0"
+				UsePrecompiledHeader="0"
+				CompileAs="0"
+			/>
+			<Tool
+				Name="VCManagedResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCPreLinkEventTool"
+			/>
+			<Tool
+				Name="VCLinkerTool"
+				OutputFile="$(TestDir)$(OutDir)\$(ProjectName).exe"
+				SubSystem="1"
+				OptimizeReferences="2"
+				EnableCOMDATFolding="2"
+				RandomizedBaseAddress="1"
+				DataExecutionPrevention="0"
+				TargetMachine="17"
+			/>
+			<Tool
+				Name="VCALinkTool"
+			/>
+			<Tool
+				Name="VCManifestTool"
+			/>
+			<Tool
+				Name="VCXDCMakeTool"
+			/>
+			<Tool
+				Name="VCBscMakeTool"
+			/>
+			<Tool
+				Name="VCFxCopTool"
+			/>
+			<Tool
+				Name="VCAppVerifierTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
+		</Configuration>
+	</Configurations>
+	<References>
+	</References>
+	<Files>
+		<File
+			RelativePath="..\..\..\tests\mpn\t-gcdext.c"
+			>
+		</File>
+	</Files>
+	<Globals>
+	</Globals>
+</VisualStudioProject>