/*------------------------------------------------------------------------
 * Vulkan Conformance Tests
 * ------------------------
 *
 * Copyright (c) 2019 The Khronos Group Inc.
 * Copyright (c) 2019 Valve Corporation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */ /*!
 * \file
 * \brief VK_EXT_subgroup_size_control Tests
 */ /*--------------------------------------------------------------------*/

#include "vktSubgroupsSizeControlTests.hpp"
#include "vktSubgroupsTestsUtils.hpp"
#include "vktTestCaseUtil.hpp"
#include "tcuTestLog.hpp"

#include <string>
#include <vector>

using namespace tcu;
using namespace std;
using namespace vk;
using namespace vkt;

namespace
{

enum RequiredSubgroupSizeMode
{
	REQUIRED_SUBGROUP_SIZE_NONE	= 0,
	REQUIRED_SUBGROUP_SIZE_MIN	= 1,
	REQUIRED_SUBGROUP_SIZE_MAX	= 2,
};

struct CaseDefinition
{
	deUint32			pipelineShaderStageCreateFlags;
	VkShaderStageFlags	shaderStage;
	deBool				requiresBallot;
	deUint32			requiredSubgroupSizeMode;
	de::SharedPtr<bool>	geometryPointSizeSupported;
};

struct internalDataStruct
{
	const Context*			context;
	struct CaseDefinition	caseDef;
	deUint32				requiredSubgroupSize;
};

// Find greatest common divisor for a and b
deUint32 gcd (deUint32 a, deUint32 b)
{
	if ((0 != a) && (0 == b))
	{
		return a;
	}
	else
	{
		deUint32 greater = max(a, b);
		deUint32 lesser  = min(a, b);

		return gcd(lesser, greater % lesser);
	}
}

UVec3	getLocalSizes (const VkPhysicalDeviceProperties&	physicalDeviceProperties,
					   deUint32								numWorkGroupInvocations)
{
	DE_ASSERT(numWorkGroupInvocations <= physicalDeviceProperties.limits.maxComputeWorkGroupInvocations);
	const deUint32 localSizeX = gcd(numWorkGroupInvocations, physicalDeviceProperties.limits.maxComputeWorkGroupSize[0]);
	const deUint32 localSizeY = gcd(deMax32(numWorkGroupInvocations / localSizeX, 1u), physicalDeviceProperties.limits.maxComputeWorkGroupSize[1]);
	const deUint32 localSizeZ = deMax32(numWorkGroupInvocations / (localSizeX * localSizeY), 1u);

	return UVec3(localSizeX, localSizeY, localSizeZ);
}

deUint32 getRequiredSubgroupSizeFromMode (Context&													context,
										  const CaseDefinition&										caseDef,
										  const VkPhysicalDeviceSubgroupSizeControlPropertiesEXT&	subgroupSizeControlProperties)
{
	switch (caseDef.requiredSubgroupSizeMode)
	{
		case REQUIRED_SUBGROUP_SIZE_MAX:	return subgroupSizeControlProperties.maxSubgroupSize;
		case REQUIRED_SUBGROUP_SIZE_MIN:	return subgroupSizeControlProperties.minSubgroupSize;
		case REQUIRED_SUBGROUP_SIZE_NONE:	return subgroups::getSubgroupSize(context);
		default:							TCU_THROW(NotSupportedError, "Unsupported Subgroup size");
	}
}

static bool checkVertexPipelineStages (const void*			internalData,
									   vector<const void*>	datas,
									   deUint32				width,
									   deUint32)
{
	const struct internalDataStruct*						checkInternalData				= reinterpret_cast<const struct internalDataStruct *>(internalData);
	const Context*											context							= checkInternalData->context;
	const VkPhysicalDeviceSubgroupSizeControlPropertiesEXT&	subgroupSizeControlProperties	= context->getSubgroupSizeControlPropertiesEXT();
	TestLog&												log								= context->getTestContext().getLog();
	const deUint32*											data							= reinterpret_cast<const deUint32*>(datas[0]);

	for (deUint32 i = 0; i < width; i++)
	{
		if (data[i] > subgroupSizeControlProperties.maxSubgroupSize ||
			data[i] < subgroupSizeControlProperties.minSubgroupSize)
		{
			log << TestLog::Message << "gl_SubgroupSize (" << data[i] << ") value is outside limits (" << subgroupSizeControlProperties.minSubgroupSize << ", " << subgroupSizeControlProperties.maxSubgroupSize << ")" << TestLog::EndMessage;

			return DE_FALSE;
		}

		if (checkInternalData->caseDef.requiredSubgroupSizeMode != REQUIRED_SUBGROUP_SIZE_NONE && data[i] != checkInternalData->requiredSubgroupSize)
		{
			log << TestLog::Message << "gl_SubgroupSize (" << data[i] << ") is not equal to the required subgroup size value (" << checkInternalData->requiredSubgroupSize << ")" << TestLog::EndMessage;

			return DE_FALSE;
		}
	}

	return DE_TRUE;
}

static bool checkFragmentPipelineStages (const void*			internalData,
										 vector<const void*>	datas,
										 deUint32				width,
										 deUint32				height,
										 deUint32)
{
	const struct internalDataStruct*						checkInternalData				= reinterpret_cast<const struct internalDataStruct *>(internalData);
	const Context*											context							= checkInternalData->context;
	const VkPhysicalDeviceSubgroupSizeControlPropertiesEXT&	subgroupSizeControlProperties	= context->getSubgroupSizeControlPropertiesEXT();
	TestLog&												log								= context->getTestContext().getLog();
	const deUint32*											data							= reinterpret_cast<const deUint32*>(datas[0]);

	for (deUint32 x = 0u; x < width; ++x)
	{
		for (deUint32 y = 0u; y < height; ++y)
		{
			const deUint32 ndx = (x * height + y);

			if (data[ndx] > subgroupSizeControlProperties.maxSubgroupSize ||
				data[ndx] < subgroupSizeControlProperties.minSubgroupSize)
			{
				log << TestLog::Message << "gl_SubgroupSize (" << data[ndx] << ") value is outside limits (" << subgroupSizeControlProperties.minSubgroupSize << ", " << subgroupSizeControlProperties.maxSubgroupSize << ")" << TestLog::EndMessage;

				return DE_FALSE;
			}

			if (checkInternalData->caseDef.requiredSubgroupSizeMode != REQUIRED_SUBGROUP_SIZE_NONE &&
				data[ndx] != checkInternalData->requiredSubgroupSize)
			{
				log << TestLog::Message << "gl_SubgroupSize (" << data[ndx] << ") is not equal to the required subgroup size value (" << checkInternalData->requiredSubgroupSize << ")" << TestLog::EndMessage;

				return DE_FALSE;
			}
		}
	}
	return true;
}

static bool checkCompute (const void*			internalData,
						  vector<const void*>	datas,
						  const deUint32		numWorkgroups[3],
						  const deUint32		localSize[3],
						  deUint32)
{
	const struct internalDataStruct*						checkInternalData				= reinterpret_cast<const struct internalDataStruct *>(internalData);
	const Context*											context							= checkInternalData->context;
	const VkPhysicalDeviceSubgroupSizeControlPropertiesEXT&	subgroupSizeControlProperties	= context->getSubgroupSizeControlPropertiesEXT();
	TestLog&												log								= context->getTestContext().getLog();
	const deUint32											globalSizeX						= numWorkgroups[0] * localSize[0];
	const deUint32											globalSizeY						= numWorkgroups[1] * localSize[1];
	const deUint32											globalSizeZ						= numWorkgroups[2] * localSize[2];
	const deUint32											width							= globalSizeX * globalSizeY * globalSizeZ;
	const deUint32*											data							= reinterpret_cast<const deUint32*>(datas[0]);

	for (deUint32 i = 0; i < width; i++)
	{
		if (data[i] > subgroupSizeControlProperties.maxSubgroupSize ||
			data[i] < subgroupSizeControlProperties.minSubgroupSize)
		{
			log << TestLog::Message << "[" << localSize[0] << ", " << localSize[1] << ", " << localSize[2] << "] "
				<< "gl_SubgroupSize (" << data[i] << ") value is outside limits (" << subgroupSizeControlProperties.minSubgroupSize << ", " << subgroupSizeControlProperties.maxSubgroupSize << ")" << TestLog::EndMessage;

			return DE_FALSE;
		}

		if (checkInternalData->caseDef.requiredSubgroupSizeMode != REQUIRED_SUBGROUP_SIZE_NONE &&
			data[i] != checkInternalData->requiredSubgroupSize)
		{
			log << TestLog::Message << "[" << localSize[0] << ", " << localSize[1] << ", " << localSize[2] << "] "
				<< "gl_SubgroupSize (" << data[i] << ") is not equal to the required subgroup size value (" << checkInternalData->requiredSubgroupSize << ")" << TestLog::EndMessage;

			return DE_FALSE;
		}
	}

	return DE_TRUE;
}

static bool checkComputeRequireFull (const void*			internalData,
									 vector<const void*>	datas,
									 const deUint32			numWorkgroups[3],
									 const deUint32			localSize[3],
									 deUint32)
{
	const struct internalDataStruct*						checkInternalData				= reinterpret_cast<const struct internalDataStruct *>(internalData);
	const Context*											context							= checkInternalData->context;
	const VkPhysicalDeviceSubgroupSizeControlPropertiesEXT&	subgroupSizeControlProperties	= context->getSubgroupSizeControlPropertiesEXT();
	TestLog&												log								= context->getTestContext().getLog();
	const deUint32											globalSizeX						= numWorkgroups[0] * localSize[0];
	const deUint32											globalSizeY						= numWorkgroups[1] * localSize[1];
	const deUint32											globalSizeZ						= numWorkgroups[2] * localSize[2];
	const deUint32											width							= globalSizeX * globalSizeY * globalSizeZ;
	const UVec4*											data							= reinterpret_cast<const UVec4*>(datas[0]);
	const deUint32											numSubgroups					= (localSize[0] * localSize[1] * localSize[2]) / checkInternalData->requiredSubgroupSize;

	for (deUint32 i = 0; i < width; i++)
	{
		if (data[i].x() > subgroupSizeControlProperties.maxSubgroupSize ||
			data[i].x() < subgroupSizeControlProperties.minSubgroupSize)
		{
			log << TestLog::Message << "[" << localSize[0] << ", " << localSize[1] << ", " << localSize[2] << "] "
				<< "gl_SubgroupSize value ( " << data[i].x() << ") is outside limits [" << subgroupSizeControlProperties.minSubgroupSize << ", " << subgroupSizeControlProperties.maxSubgroupSize << "]" << TestLog::EndMessage;
			return DE_FALSE;
		}

		if (data[i].x() != data[i].y())
		{
			log << TestLog::Message << "[" << localSize[0] << ", " << localSize[1] << ", " << localSize[2] << "] "
				<< "gl_SubgroupSize ( " << data[i].x() << ") does not match the active number of subgroup invocations (" << data[i].y() << ")" << TestLog::EndMessage;
			return DE_FALSE;
		}

		if (checkInternalData->caseDef.pipelineShaderStageCreateFlags == VK_PIPELINE_SHADER_STAGE_CREATE_REQUIRE_FULL_SUBGROUPS_BIT_EXT &&
			data[i].x() != checkInternalData->requiredSubgroupSize)
		{
			log << TestLog::Message << "[" << localSize[0] << ", " << localSize[1] << ", " << localSize[2] << "] "
				<< "expected subgroupSize (" << checkInternalData->requiredSubgroupSize << ") doesn't match gl_SubgroupSize ( " << data[i].x() << ")" << TestLog::EndMessage;
			return DE_FALSE;
		}

		if (checkInternalData->caseDef.pipelineShaderStageCreateFlags == VK_PIPELINE_SHADER_STAGE_CREATE_REQUIRE_FULL_SUBGROUPS_BIT_EXT && data[i].z() != numSubgroups)
		{
			log << TestLog::Message << "[" << localSize[0] << ", " << localSize[1] << ", " << localSize[2] << "] "
				<< "expected number of subgroups dispatched (" << numSubgroups << ") doesn't match gl_NumSubgroups (" << data[i].z() << ")" << TestLog::EndMessage;
			return DE_FALSE;
		}
	}

	return DE_TRUE;
}

void initFrameBufferPrograms (SourceCollections& programCollection, CaseDefinition caseDef)
{
	const ShaderBuildOptions	buildOptions	(programCollection.usedVulkanVersion, SPIRV_VERSION_1_3, 0u);

	if (VK_SHADER_STAGE_FRAGMENT_BIT != caseDef.shaderStage)
		subgroups::setFragmentShaderFrameBuffer(programCollection);

	if (VK_SHADER_STAGE_VERTEX_BIT != caseDef.shaderStage && VK_SHADER_STAGE_FRAGMENT_BIT != caseDef.shaderStage)
		subgroups::setVertexShaderFrameBuffer(programCollection);

	string bdyStr = "uint tempResult = gl_SubgroupSize;\n";

	if (VK_SHADER_STAGE_VERTEX_BIT == caseDef.shaderStage)
	{
		ostringstream vertex;

		vertex << glu::getGLSLVersionDeclaration(glu::GLSL_VERSION_450)<<"\n"
			<< "#extension GL_KHR_shader_subgroup_basic: enable\n"
			<< "layout(location = 0) in highp vec4 in_position;\n"
			<< "layout(location = 0) out float out_color;\n"
			<< "\n"
			<< "void main (void)\n"
			<< "{\n"
			<< bdyStr
			<< "  out_color = float(tempResult);\n"
			<< "  gl_Position = in_position;\n"
			<< "  gl_PointSize = 1.0f;\n"
			<< "}\n";

		programCollection.glslSources.add("vert") << glu::VertexSource(vertex.str()) << buildOptions;
	}
	else if (VK_SHADER_STAGE_GEOMETRY_BIT == caseDef.shaderStage)
	{
		ostringstream geometry;

		geometry << glu::getGLSLVersionDeclaration(glu::GLSL_VERSION_450)<<"\n"
			<< "#extension GL_KHR_shader_subgroup_basic: enable\n"
			<< "layout(points) in;\n"
			<< "layout(points, max_vertices = 1) out;\n"
			<< "layout(location = 0) out float out_color;\n"
			<< "void main (void)\n"
			<< "{\n"
			<< bdyStr
			<< "  out_color = float(tempResult);\n"
			<< "  gl_Position = gl_in[0].gl_Position;\n"
			<< "  gl_PointSize = 1.0f;"
			<< "  EmitVertex();\n"
			<< "  EndPrimitive();\n"
			<< "}\n";

		programCollection.glslSources.add("geometry") << glu::GeometrySource(geometry.str()) << buildOptions;
	}
	else if (VK_SHADER_STAGE_TESSELLATION_CONTROL_BIT == caseDef.shaderStage)
	{
		ostringstream controlSource;

		controlSource << glu::getGLSLVersionDeclaration(glu::GLSL_VERSION_450)<<"\n"
			<< "#extension GL_KHR_shader_subgroup_basic: enable\n"
			<< "layout(vertices = 2) out;\n"
			<< "layout(location = 0) out float out_color[];\n"
			<< "\n"
			<< "void main (void)\n"
			<< "{\n"
			<< "  if (gl_InvocationID == 0)\n"
			<< "  {\n"
			<< "    gl_TessLevelOuter[0] = 1.0f;\n"
			<< "    gl_TessLevelOuter[1] = 1.0f;\n"
			<< "  }\n"
			<< bdyStr
			<< "  out_color[gl_InvocationID ] = float(tempResult);\n"
			<< "  gl_out[gl_InvocationID].gl_Position = gl_in[gl_InvocationID].gl_Position;\n"
			<< "}\n";

		programCollection.glslSources.add("tesc") << glu::TessellationControlSource(controlSource.str()) << buildOptions;
		subgroups::setTesEvalShaderFrameBuffer(programCollection);
	}
	else if (VK_SHADER_STAGE_TESSELLATION_EVALUATION_BIT == caseDef.shaderStage)
	{
		ostringstream evaluationSource;
		evaluationSource << glu::getGLSLVersionDeclaration(glu::GLSL_VERSION_450)<<"\n"
			<< "#extension GL_KHR_shader_subgroup_basic: enable\n"
			<< "layout(isolines, equal_spacing, ccw ) in;\n"
			<< "layout(location = 0) out float out_color;\n"
			<< "void main (void)\n"
			<< "{\n"
			<< bdyStr
			<< "  out_color  = float(tempResult);\n"
			<< "  gl_Position = mix(gl_in[0].gl_Position, gl_in[1].gl_Position, gl_TessCoord.x);\n"
			<< "}\n";

		subgroups::setTesCtrlShaderFrameBuffer(programCollection);
		programCollection.glslSources.add("tese") << glu::TessellationEvaluationSource(evaluationSource.str()) << buildOptions;
	}
	else if (VK_SHADER_STAGE_FRAGMENT_BIT == caseDef.shaderStage)
	{
		const string vertex	= string(glu::getGLSLVersionDeclaration(glu::GLSL_VERSION_450)) + "\n"
			"void main (void)\n"
			"{\n"
			"  vec2 uv = vec2(float(gl_VertexIndex & 1), float((gl_VertexIndex >> 1) & 1));\n"
			"  gl_Position = vec4(uv * 4.0f -2.0f, 0.0f, 1.0f);\n"
			"  gl_PointSize = 1.0f;\n"
			"}\n";
		programCollection.glslSources.add("vert") << glu::VertexSource(vertex) << buildOptions;

		ostringstream fragmentSource;

		fragmentSource << glu::getGLSLVersionDeclaration(glu::GLSL_VERSION_450)<<"\n"
					   << "precision highp int;\n"
						<< "#extension GL_KHR_shader_subgroup_basic: enable\n"
					   << "layout(location = 0) out uint out_color;\n"
					   << "void main()\n"
					   << "{\n"
					   << bdyStr
					   << "	 out_color = tempResult;\n"
					   << "}\n";

		programCollection.glslSources.add("fragment") << glu::FragmentSource(fragmentSource.str()) << buildOptions;
	}
	else
	{
		DE_FATAL("Unsupported shader stage");
	}
}

string getExtHeader (const CaseDefinition&)
{
	return "#extension GL_KHR_shader_subgroup_basic: enable\n";
}

vector<string> getPerStageHeadDeclarations (const CaseDefinition& caseDef)
{
	const deUint32	stageCount	= subgroups::getStagesCount(caseDef.shaderStage);
	const bool		fragment	= (caseDef.shaderStage & VK_SHADER_STAGE_FRAGMENT_BIT) != 0;
	vector<string>	result		(stageCount, string());

	if (fragment)
		result.reserve(result.size() + 1);

	for (size_t i = 0; i < result.size(); ++i)
	{
		result[i] =
			"layout(set = 0, binding = " + de::toString(i) + ", std430) buffer Buffer1\n"
			"{\n"
			"  uint result[];\n"
			"};\n";
	}

	if (fragment)
	{
		const string	fragPart	=
			"layout(location = 0) out uint result;\n";

		result.push_back(fragPart);
	}

	return result;
}

string getTestSource (const CaseDefinition&)
{
	return
		"  uint tempResult = gl_SubgroupSize;\n"
		"  tempRes = tempResult;\n";
}

void initPrograms (SourceCollections& programCollection, CaseDefinition caseDef)
{
	const SpirvVersion			spirvVersion		= isAllRayTracingStages(caseDef.shaderStage) ? SPIRV_VERSION_1_4 : SPIRV_VERSION_1_3;
	const ShaderBuildOptions	buildOptions		(programCollection.usedVulkanVersion, spirvVersion, 0u);
	const string				extHeader			= getExtHeader(caseDef);
	const string				testSrc				= getTestSource(caseDef);
	const vector<string>		headDeclarations	= getPerStageHeadDeclarations(caseDef);

	subgroups::initStdPrograms(programCollection, buildOptions, caseDef.shaderStage, VK_FORMAT_R32_UINT, *caseDef.geometryPointSizeSupported, extHeader, testSrc, "", headDeclarations);
}

void initProgramsRequireFull (SourceCollections& programCollection, CaseDefinition caseDef)
{
	if (VK_SHADER_STAGE_COMPUTE_BIT != caseDef.shaderStage)
		DE_FATAL("Unsupported shader stage");

	ostringstream src;

	src << "#version 450\n"
		<< "#extension GL_KHR_shader_subgroup_basic: enable\n"
		<< "#extension GL_KHR_shader_subgroup_ballot: enable\n"
		<< "layout (local_size_x_id = 0, local_size_y_id = 1, "
		"local_size_z_id = 2) in;\n"
		<< "layout(set = 0, binding = 0, std430) buffer Buffer1\n"
		<< "{\n"
		<< "  uvec4 result[];\n"
		<< "};\n"
		<< "\n"
		<< "void main (void)\n"
		<< "{\n"
		<< "  uvec3 globalSize = gl_NumWorkGroups * gl_WorkGroupSize;\n"
		<< "  highp uint offset = globalSize.x * ((globalSize.y * "
		"gl_GlobalInvocationID.z) + gl_GlobalInvocationID.y) + "
		"gl_GlobalInvocationID.x;\n"
		<< "   result[offset].x = gl_SubgroupSize;" // save the subgroup size value
		<< "   uint numActive = subgroupBallotBitCount(subgroupBallot(true));\n"
		<< "   result[offset].y = numActive;\n" // save the number of active subgroup invocations
		<< "   result[offset].z = gl_NumSubgroups;" // save the number of subgroups dispatched.
		<< "}\n";

	programCollection.glslSources.add("comp") << glu::ComputeSource(src.str()) << ShaderBuildOptions(programCollection.usedVulkanVersion, SPIRV_VERSION_1_3, 0u);
}

void supportedCheck (Context& context)
{
	if (!subgroups::isSubgroupSupported(context))
		TCU_THROW(NotSupportedError, "Subgroup operations are not supported");

	context.requireDeviceFunctionality("VK_EXT_subgroup_size_control");
}

void supportedCheckFeatures (Context& context, CaseDefinition caseDef)
{
	supportedCheck(context);

	if (!subgroups::areSubgroupOperationsSupportedForStage(context, caseDef.shaderStage))
	{
		TCU_THROW(NotSupportedError, "Shader stage is required to support subgroup operations!");
	}

	if (caseDef.shaderStage == VK_SHADER_STAGE_ALL_GRAPHICS)
	{
		const VkPhysicalDeviceFeatures&		features	= context.getDeviceFeatures();

		if (!features.tessellationShader || !features.geometryShader)
			TCU_THROW(NotSupportedError, "Device does not support tessellation or geometry shaders");
	}

	if (caseDef.requiresBallot && !subgroups::isSubgroupFeatureSupportedForDevice(context, VK_SUBGROUP_FEATURE_BALLOT_BIT))
	{
		TCU_THROW(NotSupportedError, "Device does not support subgroup ballot operations");
	}

	if (caseDef.requiredSubgroupSizeMode != REQUIRED_SUBGROUP_SIZE_NONE ||
		caseDef.pipelineShaderStageCreateFlags == VK_PIPELINE_SHADER_STAGE_CREATE_ALLOW_VARYING_SUBGROUP_SIZE_BIT_EXT)
	{
		const VkPhysicalDeviceSubgroupSizeControlFeaturesEXT&	subgroupSizeControlFeatures	= context.getSubgroupSizeControlFeaturesEXT();

		if (subgroupSizeControlFeatures.subgroupSizeControl == DE_FALSE)
			TCU_THROW(NotSupportedError, "Device does not support varying subgroup sizes nor required subgroup size");

		if (caseDef.requiredSubgroupSizeMode != REQUIRED_SUBGROUP_SIZE_NONE)
		{
			const VkPhysicalDeviceSubgroupSizeControlPropertiesEXT&	subgroupSizeControlProperties	= context.getSubgroupSizeControlPropertiesEXT();

			if ((subgroupSizeControlProperties.requiredSubgroupSizeStages & caseDef.shaderStage) != caseDef.shaderStage)
				TCU_THROW(NotSupportedError, "Device does not support setting required subgroup size for the stages selected");
		}
	}

	if (caseDef.pipelineShaderStageCreateFlags == VK_PIPELINE_SHADER_STAGE_CREATE_REQUIRE_FULL_SUBGROUPS_BIT_EXT)
	{
		const VkPhysicalDeviceSubgroupSizeControlFeaturesEXT&	subgroupSizeControlFeatures	= context.getSubgroupSizeControlFeaturesEXT();

		if (subgroupSizeControlFeatures.computeFullSubgroups == DE_FALSE)
			TCU_THROW(NotSupportedError, "Device does not support full subgroups in compute shaders");
	}

	*caseDef.geometryPointSizeSupported = subgroups::isTessellationAndGeometryPointSizeSupported(context);
}

void supportedCheckFeaturesShader (Context& context, CaseDefinition caseDef)
{
	supportedCheckFeatures(context, caseDef);

	subgroups::supportedCheckShader(context, caseDef.shaderStage);
}

TestStatus noSSBOtest (Context& context, const CaseDefinition caseDef)
{
	const VkFormat					format			= VK_FORMAT_R32_UINT;
	const deUint32&					flags			= caseDef.pipelineShaderStageCreateFlags;
	const struct internalDataStruct	internalData	=
	{
		&context,
		caseDef,
		0u,
	};

	switch (caseDef.shaderStage)
	{
		case VK_SHADER_STAGE_VERTEX_BIT:					return subgroups::makeVertexFrameBufferTestRequiredSubgroupSize(context, format, DE_NULL, 0, &internalData, checkVertexPipelineStages, flags, 0u);
		case VK_SHADER_STAGE_GEOMETRY_BIT:					return subgroups::makeGeometryFrameBufferTestRequiredSubgroupSize(context, format, DE_NULL, 0, &internalData, checkVertexPipelineStages, flags, 0u);
		case VK_SHADER_STAGE_TESSELLATION_CONTROL_BIT:		return subgroups::makeTessellationEvaluationFrameBufferTestRequiredSubgroupSize(context, format, DE_NULL, 0, &internalData, checkVertexPipelineStages, caseDef.shaderStage, flags, 0u);
		case VK_SHADER_STAGE_TESSELLATION_EVALUATION_BIT:	return subgroups::makeTessellationEvaluationFrameBufferTestRequiredSubgroupSize(context, format, DE_NULL, 0, &internalData, checkVertexPipelineStages, caseDef.shaderStage, flags, 0u);
		case VK_SHADER_STAGE_FRAGMENT_BIT:					return subgroups::makeFragmentFrameBufferTestRequiredSubgroupSize(context, format, DE_NULL, 0, &internalData, checkFragmentPipelineStages, flags, 0u);
		default:											TCU_THROW(InternalError, "Unhandled shader stage");
	}
}

TestStatus test (Context& context, const CaseDefinition caseDef)
{
	if (isAllComputeStages(caseDef.shaderStage))
	{
		const deUint32						numWorkgroups[3]							= {1, 1, 1};
		const deUint32						subgroupSize								= subgroups::getSubgroupSize(context);
		const VkPhysicalDeviceProperties	physicalDeviceProperties					= context.getDeviceProperties();
		// Calculate the local workgroup sizes to exercise the maximum supported by the driver
		const UVec3							localSize									= getLocalSizes(physicalDeviceProperties, physicalDeviceProperties.limits.maxComputeWorkGroupInvocations);
		const deUint32						localSizesToTestCount						= 16;
		const deUint32						localSizesToTest[localSizesToTestCount][3]	=
		{
			{1, 1, 1},
			{32, 4, 1},
			{32, 1, 4},
			{1, 32, 4},
			{1, 4, 32},
			{4, 1, 32},
			{4, 32, 1},
			{subgroupSize, 1, 1},
			{1, subgroupSize, 1},
			{1, 1, subgroupSize},
			{3, 5, 7},
			{128, 1, 1},
			{1, 128, 1},
			{1, 1, 64},
			{localSize.x(), localSize.y(), localSize.z()},
			{1, 1, 1} // Isn't used, just here to make double buffering checks easier
		};
		const struct internalDataStruct		internalData								=
		{
			&context,
			caseDef,
			subgroupSize,
		};

		return subgroups::makeComputeTestRequiredSubgroupSize(context,
															  VK_FORMAT_R32_UINT,
															  DE_NULL,
															  0,
															  &internalData,
															  checkCompute,
															  caseDef.pipelineShaderStageCreateFlags,
															  numWorkgroups,
															  DE_FALSE,
															  subgroupSize,
															  localSizesToTest,
															  localSizesToTestCount);
	}
	else if (isAllGraphicsStages(caseDef.shaderStage))
	{
		const VkShaderStageFlags	stages			= subgroups::getPossibleGraphicsSubgroupStages(context, caseDef.shaderStage);
		struct internalDataStruct	internalData	=
		{
			&context,
			caseDef,
			0u,
		};

		return subgroups::allStagesRequiredSubgroupSize(context,
														VK_FORMAT_R32_UINT,
														DE_NULL,
														0,
														&internalData,
														checkVertexPipelineStages,
														stages,
														caseDef.pipelineShaderStageCreateFlags,
														caseDef.pipelineShaderStageCreateFlags,
														caseDef.pipelineShaderStageCreateFlags,
														caseDef.pipelineShaderStageCreateFlags,
														caseDef.pipelineShaderStageCreateFlags,
														DE_NULL);
	}
	else if (isAllRayTracingStages(caseDef.shaderStage))
	{
		const VkShaderStageFlags		stages			= subgroups::getPossibleRayTracingSubgroupStages(context, caseDef.shaderStage);
		const vector<deUint32>			flags			(6, caseDef.pipelineShaderStageCreateFlags);
		const struct internalDataStruct	internalData	=
		{
			&context,
			caseDef,
			0u,
		};

		return subgroups::allRayTracingStagesRequiredSubgroupSize(context,
																  VK_FORMAT_R32_UINT,
																  DE_NULL,
																  0,
																  &internalData,
																  checkVertexPipelineStages,
																  stages,
																  flags.data(),
																  DE_NULL);
	}
	else
		TCU_THROW(InternalError, "Unknown stage or invalid stage set");
}

TestStatus testRequireFullSubgroups (Context& context, const CaseDefinition caseDef)
{
	DE_ASSERT(VK_SHADER_STAGE_COMPUTE_BIT == caseDef.shaderStage);
	DE_ASSERT(caseDef.requiredSubgroupSizeMode == REQUIRED_SUBGROUP_SIZE_NONE);

	const deUint32												numWorkgroups[3]							= {1, 1, 1};
	const VkPhysicalDeviceSubgroupSizeControlPropertiesEXT&		subgroupSizeControlProperties				= context.getSubgroupSizeControlPropertiesEXT();
	const VkPhysicalDeviceProperties&							physicalDeviceProperties					= context.getDeviceProperties();
	// Calculate the local workgroup sizes to exercise the maximum supported by the driver
	const UVec3													localSize									= getLocalSizes(physicalDeviceProperties, physicalDeviceProperties.limits.maxComputeWorkGroupInvocations);
	const deUint32												subgroupSize								= subgroups::getSubgroupSize(context);
	// For full subgroups and allow varying subgroup size, localsize X must be a multiple of maxSubgroupSize.
	// We set local size X for this test to the maximum, regardless if allow varying subgroup size is enabled or not.
	const deUint32												localSizesToTestCount						= 7;
	const deUint32												localSizesToTest[localSizesToTestCount][3]	=
	{
		{subgroupSizeControlProperties.maxSubgroupSize, 1, 1},
		{subgroupSizeControlProperties.maxSubgroupSize, 4, 1},
		{subgroupSizeControlProperties.maxSubgroupSize, 1, 4},
		{subgroupSizeControlProperties.maxSubgroupSize * 2, 1, 2},
		{subgroupSizeControlProperties.maxSubgroupSize * 4, 1, 1},
		{localSize.x(), localSize.y(), localSize.z()},
		{1, 1, 1} // Isn't used, just here to make double buffering checks easier
	};
	const struct internalDataStruct								internalData								=
	{
		&context,
		caseDef,
		subgroupSize,
	};

	return subgroups::makeComputeTestRequiredSubgroupSize(context,
														  VK_FORMAT_R32G32B32A32_UINT,
														  DE_NULL,
														  0,
														  &internalData,
														  checkComputeRequireFull,
														  caseDef.pipelineShaderStageCreateFlags,
														  numWorkgroups,
														  DE_FALSE,
														  subgroupSize,
														  localSizesToTest,
														  localSizesToTestCount);
}

TestStatus testRequireSubgroupSize (Context& context, const CaseDefinition caseDef)
{
	if (isAllComputeStages(caseDef.shaderStage))
	{
		const deUint32											numWorkgroups[3]							= {1, 1, 1};
		const VkPhysicalDeviceSubgroupSizeControlPropertiesEXT&	subgroupSizeControlProperties				= context.getSubgroupSizeControlPropertiesEXT();
		const VkPhysicalDeviceProperties&						physicalDeviceProperties					= context.getDeviceProperties();
		const deUint32											requiredSubgroupSize						= getRequiredSubgroupSizeFromMode(context, caseDef, subgroupSizeControlProperties);
		const deUint64											maxSubgroupLimitSize						= (deUint64)requiredSubgroupSize * subgroupSizeControlProperties.maxComputeWorkgroupSubgroups;
		const deUint32											maxTotalLocalSize							= (deUint32)min<deUint64>(maxSubgroupLimitSize, physicalDeviceProperties.limits.maxComputeWorkGroupInvocations);
		const UVec3												localSize									= getLocalSizes(physicalDeviceProperties, maxTotalLocalSize);
		const deUint32											localSizesToTest[5][3]	=
		{
			{localSize.x(), localSize.y(), localSize.z()},
			{requiredSubgroupSize, 1, 1},
			{1, requiredSubgroupSize, 1},
			{1, 1, requiredSubgroupSize},
			{1, 1, 1} // Isn't used, just here to make double buffering checks easier
		};

		deUint32 localSizesToTestCount = 5;
		if (caseDef.pipelineShaderStageCreateFlags & VK_PIPELINE_SHADER_STAGE_CREATE_REQUIRE_FULL_SUBGROUPS_BIT_EXT)
			localSizesToTestCount = 3;

		struct internalDataStruct internalData =
		{
			&context,				//  const Context*			context;
			caseDef,				//  struct CaseDefinition	caseDef;
			requiredSubgroupSize,	//  deUint32				requiredSubgroupSize;
		};

		// Depending on the flag we need to run one verification function or another.
		return subgroups::makeComputeTestRequiredSubgroupSize(context,
															  VK_FORMAT_R32G32B32A32_UINT,
															  DE_NULL,
															  0,
															  &internalData,
															  caseDef.pipelineShaderStageCreateFlags == VK_PIPELINE_SHADER_STAGE_CREATE_REQUIRE_FULL_SUBGROUPS_BIT_EXT ? checkComputeRequireFull : checkCompute,
															  caseDef.pipelineShaderStageCreateFlags,
															  numWorkgroups,
															  DE_TRUE,
															  requiredSubgroupSize,
															  localSizesToTest,
															  localSizesToTestCount);
	}
	else if (isAllGraphicsStages(caseDef.shaderStage))
	{
		const VkShaderStageFlags								stages							= subgroups::getPossibleGraphicsSubgroupStages(context, caseDef.shaderStage);
		const VkPhysicalDeviceSubgroupSizeControlPropertiesEXT&	subgroupSizeControlProperties	= context.getSubgroupSizeControlPropertiesEXT();
		const deUint32											requiredSubgroupSize			= getRequiredSubgroupSizeFromMode(context, caseDef, subgroupSizeControlProperties);
		const deUint32											requiredSubgroupSizes[5]		= { requiredSubgroupSize, requiredSubgroupSize, requiredSubgroupSize, requiredSubgroupSize, requiredSubgroupSize};
		const struct internalDataStruct							internalData					=
		{
			&context,				//  const Context*			context;
			caseDef,				//  struct CaseDefinition	caseDef;
			requiredSubgroupSize,	//  deUint32				requiredSubgroupSize;
		};

		return subgroups::allStagesRequiredSubgroupSize(context,
														VK_FORMAT_R32_UINT,
														DE_NULL,
														0,
														&internalData,
														checkVertexPipelineStages,
														stages,
														caseDef.pipelineShaderStageCreateFlags,
														caseDef.pipelineShaderStageCreateFlags,
														caseDef.pipelineShaderStageCreateFlags,
														caseDef.pipelineShaderStageCreateFlags,
														caseDef.pipelineShaderStageCreateFlags,
														requiredSubgroupSizes);
	}
	else if (isAllRayTracingStages(caseDef.shaderStage))
	{
		const VkShaderStageFlags								stages							= subgroups::getPossibleRayTracingSubgroupStages(context, caseDef.shaderStage);
		const VkPhysicalDeviceSubgroupSizeControlPropertiesEXT&	subgroupSizeControlProperties	= context.getSubgroupSizeControlPropertiesEXT();
		const deUint32											requiredSubgroupSize			= getRequiredSubgroupSizeFromMode(context, caseDef, subgroupSizeControlProperties);
		const vector<deUint32>									flags							(6, caseDef.pipelineShaderStageCreateFlags);
		const vector<deUint32>									requiredSubgroupSizes			(6, requiredSubgroupSize);
		const struct internalDataStruct							internalData					=
		{
			&context,				//  const Context*			context;
			caseDef,				//  struct CaseDefinition	caseDef;
			requiredSubgroupSize,	//  deUint32				requiredSubgroupSize;
		};

		return subgroups::allRayTracingStagesRequiredSubgroupSize(context,
																  VK_FORMAT_R32_UINT,
																  DE_NULL,
																  0,
																  &internalData,
																  checkVertexPipelineStages,
																  stages,
																  flags.data(),
																  requiredSubgroupSizes.data());
	}
	else
		TCU_THROW(InternalError, "Unknown stage or invalid stage set");
}

TestStatus noSSBOtestRequireSubgroupSize (Context& context, const CaseDefinition caseDef)
{
	const VkPhysicalDeviceSubgroupSizeControlPropertiesEXT& subgroupSizeControlProperties	= context.getSubgroupSizeControlPropertiesEXT();
	const deUint32											requiredSubgroupSize			= getRequiredSubgroupSizeFromMode(context, caseDef, subgroupSizeControlProperties);
	const VkFormat											format							= VK_FORMAT_R32_UINT;
	const deUint32&											flags							= caseDef.pipelineShaderStageCreateFlags;
	const deUint32&											size							= requiredSubgroupSize;
	struct internalDataStruct								internalData					=
	{
		&context,
		caseDef,
		requiredSubgroupSize,
	};

	switch (caseDef.shaderStage)
	{
		case VK_SHADER_STAGE_VERTEX_BIT:					return subgroups::makeVertexFrameBufferTestRequiredSubgroupSize(context, format, DE_NULL, 0, &internalData, checkVertexPipelineStages, flags, size);
		case VK_SHADER_STAGE_GEOMETRY_BIT:					return subgroups::makeGeometryFrameBufferTestRequiredSubgroupSize(context, format, DE_NULL, 0, &internalData, checkVertexPipelineStages, flags, size);
		case VK_SHADER_STAGE_TESSELLATION_CONTROL_BIT:		return subgroups::makeTessellationEvaluationFrameBufferTestRequiredSubgroupSize(context, format, DE_NULL, 0, &internalData, checkVertexPipelineStages, caseDef.shaderStage, flags, size);
		case VK_SHADER_STAGE_TESSELLATION_EVALUATION_BIT:	return subgroups::makeTessellationEvaluationFrameBufferTestRequiredSubgroupSize(context, format, DE_NULL, 0, &internalData, checkVertexPipelineStages, caseDef.shaderStage, flags, size);
		case VK_SHADER_STAGE_FRAGMENT_BIT:					return subgroups::makeFragmentFrameBufferTestRequiredSubgroupSize(context, format, DE_NULL, 0, &internalData, checkFragmentPipelineStages, flags, size);
		default:											TCU_THROW(InternalError, "Unhandled shader stage");
	}
}

TestStatus testSanitySubgroupSizeProperties (Context& context)
{
	VkPhysicalDeviceSubgroupSizeControlPropertiesEXT subgroupSizeControlProperties;
	subgroupSizeControlProperties.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SUBGROUP_SIZE_CONTROL_PROPERTIES_EXT;
	subgroupSizeControlProperties.pNext = DE_NULL;

	VkPhysicalDeviceSubgroupProperties subgroupProperties;
	subgroupProperties.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SUBGROUP_PROPERTIES;
	subgroupProperties.pNext = &subgroupSizeControlProperties;

	VkPhysicalDeviceProperties2 properties;
	properties.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PROPERTIES_2;
	properties.pNext = &subgroupProperties;

	context.getInstanceInterface().getPhysicalDeviceProperties2(context.getPhysicalDevice(), &properties);

	if (subgroupProperties.subgroupSize > subgroupSizeControlProperties.maxSubgroupSize ||
		subgroupProperties.subgroupSize < subgroupSizeControlProperties.minSubgroupSize)
	{
		ostringstream error;
		error << "subgroupSize (" << subgroupProperties.subgroupSize << ") is not between maxSubgroupSize (";
		error << subgroupSizeControlProperties.maxSubgroupSize << ") and minSubgroupSize (";
		error << subgroupSizeControlProperties.minSubgroupSize << ")";

		return TestStatus::fail(error.str().c_str());
	}

	return TestStatus::pass("OK");
}
}

namespace vkt
{
namespace subgroups
{
TestCaseGroup* createSubgroupsSizeControlTests (TestContext& testCtx)
{
	de::MovePtr<TestCaseGroup>	group				(new TestCaseGroup(testCtx, "size_control", "VK_EXT_subgroup_size_control tests"));
	de::MovePtr<TestCaseGroup>	framebufferGroup	(new TestCaseGroup(testCtx, "framebuffer", "Subgroup size control category tests: framebuffer"));
	de::MovePtr<TestCaseGroup>	computeGroup		(new TestCaseGroup(testCtx, "compute", "Subgroup size control category tests: compute"));
	de::MovePtr<TestCaseGroup>	graphicsGroup		(new TestCaseGroup(testCtx, "graphics", "Subgroup size control category tests: graphics"));
	de::MovePtr<TestCaseGroup>	raytracingGroup		(new TestCaseGroup(testCtx, "ray_tracing", "Subgroup size control category tests: ray tracing"));
	de::MovePtr<TestCaseGroup>	genericGroup		(new TestCaseGroup(testCtx, "generic", "Subgroup size control category tests: generic"));
	const VkShaderStageFlags	stages[]			=
	{
		VK_SHADER_STAGE_VERTEX_BIT,
		VK_SHADER_STAGE_TESSELLATION_EVALUATION_BIT,
		VK_SHADER_STAGE_TESSELLATION_CONTROL_BIT,
		VK_SHADER_STAGE_GEOMETRY_BIT,
		VK_SHADER_STAGE_FRAGMENT_BIT,
	};

	// Test sanity of the subgroup size properties.
	{
		addFunctionCase(genericGroup.get(), "subgroup_size_properties", "", supportedCheck, testSanitySubgroupSizeProperties);
	}

	// Allow varying subgroup case.
	{
		const CaseDefinition caseDefCompute = {VK_PIPELINE_SHADER_STAGE_CREATE_ALLOW_VARYING_SUBGROUP_SIZE_BIT_EXT, VK_SHADER_STAGE_COMPUTE_BIT, DE_FALSE, REQUIRED_SUBGROUP_SIZE_NONE, de::SharedPtr<bool>(new bool)};
		addFunctionCaseWithPrograms(computeGroup.get(), "allow_varying_subgroup_size", "", supportedCheckFeatures, initPrograms, test, caseDefCompute);
		const CaseDefinition caseDefAllGraphics = {VK_PIPELINE_SHADER_STAGE_CREATE_ALLOW_VARYING_SUBGROUP_SIZE_BIT_EXT, VK_SHADER_STAGE_ALL_GRAPHICS, DE_FALSE, REQUIRED_SUBGROUP_SIZE_NONE, de::SharedPtr<bool>(new bool)};
		addFunctionCaseWithPrograms(graphicsGroup.get(), "allow_varying_subgroup_size", "", supportedCheckFeaturesShader, initPrograms, test, caseDefAllGraphics);
		const CaseDefinition caseDefAllRaytracing = {VK_PIPELINE_SHADER_STAGE_CREATE_ALLOW_VARYING_SUBGROUP_SIZE_BIT_EXT, SHADER_STAGE_ALL_RAY_TRACING, DE_FALSE, REQUIRED_SUBGROUP_SIZE_NONE, de::SharedPtr<bool>(new bool)};
		addFunctionCaseWithPrograms(raytracingGroup.get(), "allow_varying_subgroup_size", "", supportedCheckFeaturesShader, initPrograms, test, caseDefAllRaytracing);

		for (int stageIndex = 0; stageIndex < DE_LENGTH_OF_ARRAY(stages); ++stageIndex)
		{
			const CaseDefinition caseDefStage = {VK_PIPELINE_SHADER_STAGE_CREATE_ALLOW_VARYING_SUBGROUP_SIZE_BIT_EXT, stages[stageIndex], DE_FALSE, REQUIRED_SUBGROUP_SIZE_NONE, de::SharedPtr<bool>(new bool)};
			addFunctionCaseWithPrograms(framebufferGroup.get(),  getShaderStageName(caseDefStage.shaderStage) + "_allow_varying_subgroup_size", "", supportedCheckFeaturesShader, initFrameBufferPrograms, noSSBOtest, caseDefStage);
		}
	}

	// Require full subgroups case (only compute shaders).
	{
		const CaseDefinition caseDef = {VK_PIPELINE_SHADER_STAGE_CREATE_REQUIRE_FULL_SUBGROUPS_BIT_EXT, VK_SHADER_STAGE_COMPUTE_BIT, DE_TRUE, REQUIRED_SUBGROUP_SIZE_NONE, de::SharedPtr<bool>(new bool)};
		addFunctionCaseWithPrograms(computeGroup.get(), "require_full_subgroups", "", supportedCheckFeatures, initProgramsRequireFull, testRequireFullSubgroups, caseDef);
	}

	// Require full subgroups together with allow varying subgroup (only compute shaders).
	{
		deUint32 flags = VK_PIPELINE_SHADER_STAGE_CREATE_REQUIRE_FULL_SUBGROUPS_BIT_EXT | VK_PIPELINE_SHADER_STAGE_CREATE_ALLOW_VARYING_SUBGROUP_SIZE_BIT_EXT;
		const CaseDefinition caseDef = {flags, VK_SHADER_STAGE_COMPUTE_BIT, DE_TRUE, REQUIRED_SUBGROUP_SIZE_NONE, de::SharedPtr<bool>(new bool)};
		addFunctionCaseWithPrograms(computeGroup.get(), "require_full_subgroups_allow_varying_subgroup_size", "", supportedCheckFeatures, initProgramsRequireFull, testRequireFullSubgroups, caseDef);
	}

	// Tests to check setting a required subgroup size value.
	{
		const CaseDefinition caseDefAllGraphicsMax = {0u, VK_SHADER_STAGE_ALL_GRAPHICS, DE_FALSE, REQUIRED_SUBGROUP_SIZE_MAX, de::SharedPtr<bool>(new bool)};
		addFunctionCaseWithPrograms(graphicsGroup.get(), "required_subgroup_size_max", "", supportedCheckFeaturesShader, initPrograms, testRequireSubgroupSize, caseDefAllGraphicsMax);
		const CaseDefinition caseDefComputeMax = {0u, VK_SHADER_STAGE_COMPUTE_BIT, DE_FALSE, REQUIRED_SUBGROUP_SIZE_MAX, de::SharedPtr<bool>(new bool)};
		addFunctionCaseWithPrograms(computeGroup.get(), "required_subgroup_size_max", "", supportedCheckFeatures, initPrograms, testRequireSubgroupSize, caseDefComputeMax);
		const CaseDefinition caseDefAllRaytracingMax = {0u, SHADER_STAGE_ALL_RAY_TRACING, DE_FALSE, REQUIRED_SUBGROUP_SIZE_MAX, de::SharedPtr<bool>(new bool)};
		addFunctionCaseWithPrograms(raytracingGroup.get(), "required_subgroup_size_max", "", supportedCheckFeaturesShader, initPrograms, testRequireSubgroupSize, caseDefAllRaytracingMax);

		const CaseDefinition caseDefAllGraphicsMin = {0u, VK_SHADER_STAGE_ALL_GRAPHICS, DE_FALSE, REQUIRED_SUBGROUP_SIZE_MIN, de::SharedPtr<bool>(new bool)};
		addFunctionCaseWithPrograms(graphicsGroup.get(), "required_subgroup_size_min", "", supportedCheckFeaturesShader, initPrograms, testRequireSubgroupSize, caseDefAllGraphicsMin);
		const CaseDefinition caseDefComputeMin = {0u, VK_SHADER_STAGE_COMPUTE_BIT, DE_FALSE, REQUIRED_SUBGROUP_SIZE_MIN, de::SharedPtr<bool>(new bool)};
		addFunctionCaseWithPrograms(computeGroup.get(), "required_subgroup_size_min", "", supportedCheckFeatures, initPrograms, testRequireSubgroupSize, caseDefComputeMin);
		const CaseDefinition caseDefAllRaytracingMin = {0u, SHADER_STAGE_ALL_RAY_TRACING, DE_FALSE, REQUIRED_SUBGROUP_SIZE_MIN, de::SharedPtr<bool>(new bool)};
		addFunctionCaseWithPrograms(raytracingGroup.get(), "required_subgroup_size_min", "", supportedCheckFeaturesShader, initPrograms, testRequireSubgroupSize, caseDefAllRaytracingMin);
		for (int stageIndex = 0; stageIndex < DE_LENGTH_OF_ARRAY(stages); ++stageIndex)
		{
			const CaseDefinition caseDefStageMax = {0u, stages[stageIndex], DE_FALSE, REQUIRED_SUBGROUP_SIZE_MAX, de::SharedPtr<bool>(new bool)};
			addFunctionCaseWithPrograms(framebufferGroup.get(),  getShaderStageName(caseDefStageMax.shaderStage) + "_required_subgroup_size_max", "", supportedCheckFeaturesShader, initFrameBufferPrograms, noSSBOtestRequireSubgroupSize, caseDefStageMax);
			const CaseDefinition caseDefStageMin = {0u, stages[stageIndex], DE_FALSE, REQUIRED_SUBGROUP_SIZE_MIN, de::SharedPtr<bool>(new bool)};
			addFunctionCaseWithPrograms(framebufferGroup.get(),  getShaderStageName(caseDefStageMin.shaderStage) + "_required_subgroup_size_min", "", supportedCheckFeaturesShader, initFrameBufferPrograms, noSSBOtestRequireSubgroupSize, caseDefStageMin);
		}
	}

	// Tests to check setting a required subgroup size value, together with require full subgroups (only compute shaders).
	{
		deUint32 flags = VK_PIPELINE_SHADER_STAGE_CREATE_REQUIRE_FULL_SUBGROUPS_BIT_EXT;
		const CaseDefinition caseDefMax = {flags, VK_SHADER_STAGE_COMPUTE_BIT, DE_TRUE, REQUIRED_SUBGROUP_SIZE_MAX, de::SharedPtr<bool>(new bool)};
		addFunctionCaseWithPrograms(computeGroup.get(), "required_subgroup_size_max_require_full_subgroups", "", supportedCheckFeatures, initProgramsRequireFull, testRequireSubgroupSize, caseDefMax);
		const CaseDefinition caseDefMin = {flags, VK_SHADER_STAGE_COMPUTE_BIT, DE_TRUE, REQUIRED_SUBGROUP_SIZE_MIN, de::SharedPtr<bool>(new bool)};
		addFunctionCaseWithPrograms(computeGroup.get(), "required_subgroup_size_min_require_full_subgroups", "", supportedCheckFeatures, initProgramsRequireFull, testRequireSubgroupSize, caseDefMin);
	}

	group->addChild(genericGroup.release());
	group->addChild(graphicsGroup.release());
	group->addChild(computeGroup.release());
	group->addChild(framebufferGroup.release());
	group->addChild(raytracingGroup.release());

	return group.release();
}

} // subgroups
} // vkt