/*------------------------------------------------------------------------
 * Vulkan Conformance Tests
 * ------------------------
 *
 * Copyright (c) 2019 The Khronos Group Inc.
 * Copyright (c) 2019 Google Inc.
 * Copyright (c) 2017 Codeplay Software Ltd.
 *
 * 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 Subgroups Tests
 */ /*--------------------------------------------------------------------*/

#include "vktSubgroupsArithmeticTests.hpp"
#include "vktSubgroupsScanHelpers.hpp"
#include "vktSubgroupsTestsUtils.hpp"

#include <string>
#include <vector>

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

namespace
{
enum OpType
{
	OPTYPE_ADD = 0,
	OPTYPE_MUL,
	OPTYPE_MIN,
	OPTYPE_MAX,
	OPTYPE_AND,
	OPTYPE_OR,
	OPTYPE_XOR,
	OPTYPE_INCLUSIVE_ADD,
	OPTYPE_INCLUSIVE_MUL,
	OPTYPE_INCLUSIVE_MIN,
	OPTYPE_INCLUSIVE_MAX,
	OPTYPE_INCLUSIVE_AND,
	OPTYPE_INCLUSIVE_OR,
	OPTYPE_INCLUSIVE_XOR,
	OPTYPE_EXCLUSIVE_ADD,
	OPTYPE_EXCLUSIVE_MUL,
	OPTYPE_EXCLUSIVE_MIN,
	OPTYPE_EXCLUSIVE_MAX,
	OPTYPE_EXCLUSIVE_AND,
	OPTYPE_EXCLUSIVE_OR,
	OPTYPE_EXCLUSIVE_XOR,
	OPTYPE_LAST
};

static Operator getOperator(OpType t)
{
	switch (t)
	{
		case OPTYPE_ADD:
		case OPTYPE_INCLUSIVE_ADD:
		case OPTYPE_EXCLUSIVE_ADD:
			return OPERATOR_ADD;
		case OPTYPE_MUL:
		case OPTYPE_INCLUSIVE_MUL:
		case OPTYPE_EXCLUSIVE_MUL:
			return OPERATOR_MUL;
		case OPTYPE_MIN:
		case OPTYPE_INCLUSIVE_MIN:
		case OPTYPE_EXCLUSIVE_MIN:
			return OPERATOR_MIN;
		case OPTYPE_MAX:
		case OPTYPE_INCLUSIVE_MAX:
		case OPTYPE_EXCLUSIVE_MAX:
			return OPERATOR_MAX;
		case OPTYPE_AND:
		case OPTYPE_INCLUSIVE_AND:
		case OPTYPE_EXCLUSIVE_AND:
			return OPERATOR_AND;
		case OPTYPE_OR:
		case OPTYPE_INCLUSIVE_OR:
		case OPTYPE_EXCLUSIVE_OR:
			return OPERATOR_OR;
		case OPTYPE_XOR:
		case OPTYPE_INCLUSIVE_XOR:
		case OPTYPE_EXCLUSIVE_XOR:
			return OPERATOR_XOR;
		default:
			DE_FATAL("Unsupported op type");
			return OPERATOR_ADD;
	}
}

static ScanType getScanType(OpType t)
{
	switch (t)
	{
		case OPTYPE_ADD:
		case OPTYPE_MUL:
		case OPTYPE_MIN:
		case OPTYPE_MAX:
		case OPTYPE_AND:
		case OPTYPE_OR:
		case OPTYPE_XOR:
			return SCAN_REDUCE;
		case OPTYPE_INCLUSIVE_ADD:
		case OPTYPE_INCLUSIVE_MUL:
		case OPTYPE_INCLUSIVE_MIN:
		case OPTYPE_INCLUSIVE_MAX:
		case OPTYPE_INCLUSIVE_AND:
		case OPTYPE_INCLUSIVE_OR:
		case OPTYPE_INCLUSIVE_XOR:
			return SCAN_INCLUSIVE;
		case OPTYPE_EXCLUSIVE_ADD:
		case OPTYPE_EXCLUSIVE_MUL:
		case OPTYPE_EXCLUSIVE_MIN:
		case OPTYPE_EXCLUSIVE_MAX:
		case OPTYPE_EXCLUSIVE_AND:
		case OPTYPE_EXCLUSIVE_OR:
		case OPTYPE_EXCLUSIVE_XOR:
			return SCAN_EXCLUSIVE;
		default:
			DE_FATAL("Unsupported op type");
			return SCAN_REDUCE;
	}
}

static bool checkVertexPipelineStages(const void* internalData, std::vector<const void*> datas,
									  deUint32 width, deUint32)
{
	DE_UNREF(internalData);
	return vkt::subgroups::check(datas, width, 0x3);
}

static bool checkCompute(const void* internalData, std::vector<const void*> datas,
						 const deUint32 numWorkgroups[3], const deUint32 localSize[3],
						 deUint32)
{
	DE_UNREF(internalData);
	return vkt::subgroups::checkCompute(datas, numWorkgroups, localSize, 0x3);
}

std::string getOpTypeName(Operator op, ScanType scanType)
{
   return getScanOpName("subgroup", "", op, scanType);
}

struct CaseDefinition
{
	Operator			op;
	ScanType			scanType;
	VkShaderStageFlags	shaderStage;
	VkFormat			format;
	de::SharedPtr<bool>	geometryPointSizeSupported;
	deBool				requiredSubgroupSize;
};

std::string getExtHeader(CaseDefinition caseDef)
{
	return	"#extension GL_KHR_shader_subgroup_arithmetic: enable\n"
			"#extension GL_KHR_shader_subgroup_ballot: enable\n" +
			subgroups::getAdditionalExtensionForFormat(caseDef.format);
}

std::string getIndexVars(CaseDefinition caseDef)
{
	switch (caseDef.scanType)
	{
		case SCAN_REDUCE:
			return "  uint start = 0, end = gl_SubgroupSize;\n";
		case SCAN_INCLUSIVE:
			return "  uint start = 0, end = gl_SubgroupInvocationID + 1;\n";
		case SCAN_EXCLUSIVE:
			return "  uint start = 0, end = gl_SubgroupInvocationID;\n";
	}
	DE_FATAL("Unreachable");
	return "";
}

std::string getTestSrc(CaseDefinition caseDef)
{
	std::string indexVars = getIndexVars(caseDef);

	return	"  uvec4 mask = subgroupBallot(true);\n"
			+ indexVars +
			"  " + subgroups::getFormatNameForGLSL(caseDef.format) + " ref = "
			+ getIdentity(caseDef.op, caseDef.format) + ";\n"
			"  tempRes = 0;\n"
			"  for (uint index = start; index < end; index++)\n"
			"  {\n"
			"    if (subgroupBallotBitExtract(mask, index))\n"
			"    {\n"
			"      ref = " + getOpOperation(caseDef.op, caseDef.format, "ref", "data[index]") + ";\n"
			"    }\n"
			"  }\n"
			"  tempRes = " + getCompare(caseDef.op, caseDef.format, "ref", getOpTypeName(caseDef.op, caseDef.scanType) + "(data[gl_SubgroupInvocationID])") + " ? 0x1 : 0;\n"
			"  if (1 == (gl_SubgroupInvocationID % 2))\n"
			"  {\n"
			"    mask = subgroupBallot(true);\n"
			"    ref = " + getIdentity(caseDef.op, caseDef.format) + ";\n"
			"    for (uint index = start; index < end; index++)\n"
			"    {\n"
			"      if (subgroupBallotBitExtract(mask, index))\n"
			"      {\n"
			"        ref = " + getOpOperation(caseDef.op, caseDef.format, "ref", "data[index]") + ";\n"
			"      }\n"
			"    }\n"
			"    tempRes |= " + getCompare(caseDef.op, caseDef.format, "ref", getOpTypeName(caseDef.op, caseDef.scanType) + "(data[gl_SubgroupInvocationID])") + " ? 0x2 : 0;\n"
			"  }\n"
			"  else\n"
			"  {\n"
			"    tempRes |= 0x2;\n"
			"  }\n";
}

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

	std::string extHeader	= getExtHeader(caseDef);
	std::string testSrc		= getTestSrc(caseDef);

	subgroups::initStdFrameBufferPrograms(programCollection, buildOptions, caseDef.shaderStage, caseDef.format, *caseDef.geometryPointSizeSupported, extHeader, testSrc, "");
}

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

	std::string extHeader	= getExtHeader(caseDef);
	std::string testSrc		= getTestSrc(caseDef);

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

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

	if (!subgroups::isSubgroupFeatureSupportedForDevice(context, VK_SUBGROUP_FEATURE_ARITHMETIC_BIT))
		TCU_THROW(NotSupportedError, "Device does not support subgroup arithmetic operations");

	if (!subgroups::isFormatSupportedForDevice(context, caseDef.format))
		TCU_THROW(NotSupportedError, "Device does not support the specified format in subgroup operations");

	if (caseDef.requiredSubgroupSize)
	{
		if (!context.requireDeviceFunctionality("VK_EXT_subgroup_size_control"))
			TCU_THROW(NotSupportedError, "Device does not support VK_EXT_subgroup_size_control extension");
		VkPhysicalDeviceSubgroupSizeControlFeaturesEXT subgroupSizeControlFeatures;
		subgroupSizeControlFeatures.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SUBGROUP_SIZE_CONTROL_FEATURES_EXT;
		subgroupSizeControlFeatures.pNext = DE_NULL;

		VkPhysicalDeviceFeatures2 features;
		features.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FEATURES_2;
		features.pNext = &subgroupSizeControlFeatures;

		context.getInstanceInterface().getPhysicalDeviceFeatures2(context.getPhysicalDevice(), &features);

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

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

		VkPhysicalDeviceSubgroupSizeControlPropertiesEXT subgroupSizeControlProperties;
		subgroupSizeControlProperties.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SUBGROUP_SIZE_CONTROL_PROPERTIES_EXT;
		subgroupSizeControlProperties.pNext = DE_NULL;

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

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

		if ((subgroupSizeControlProperties.requiredSubgroupSizeStages & caseDef.shaderStage) != caseDef.shaderStage)
			TCU_THROW(NotSupportedError, "Required subgroup size is not supported for shader stage");
	}

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

tcu::TestStatus noSSBOtest (Context& context, const CaseDefinition caseDef)
{
	if (!subgroups::areSubgroupOperationsSupportedForStage(context, caseDef.shaderStage))
	{
		if (subgroups::areSubgroupOperationsRequiredForStage(caseDef.shaderStage))
		{
			return tcu::TestStatus::fail(
					   "Shader stage " +
					   subgroups::getShaderStageName(caseDef.shaderStage) +
					   " is required to support subgroup operations!");
		}
		else
		{
			TCU_THROW(NotSupportedError, "Device does not support subgroup operations for this stage");
		}
	}

	subgroups::SSBOData inputData;
	inputData.format = caseDef.format;
	inputData.layout = subgroups::SSBOData::LayoutStd140;
	inputData.numElements = subgroups::maxSupportedSubgroupSize();
	inputData.initializeType = subgroups::SSBOData::InitializeNonZero;

	if (VK_SHADER_STAGE_VERTEX_BIT == caseDef.shaderStage)
		return subgroups::makeVertexFrameBufferTest(context, VK_FORMAT_R32_UINT, &inputData, 1, DE_NULL, checkVertexPipelineStages);
	else if (VK_SHADER_STAGE_GEOMETRY_BIT == caseDef.shaderStage)
		return subgroups::makeGeometryFrameBufferTest(context, VK_FORMAT_R32_UINT, &inputData, 1, DE_NULL, checkVertexPipelineStages);
	else if (VK_SHADER_STAGE_TESSELLATION_CONTROL_BIT == caseDef.shaderStage)
		return subgroups::makeTessellationEvaluationFrameBufferTest(context, VK_FORMAT_R32_UINT, &inputData, 1, DE_NULL, checkVertexPipelineStages, VK_SHADER_STAGE_TESSELLATION_CONTROL_BIT);
	else if (VK_SHADER_STAGE_TESSELLATION_EVALUATION_BIT == caseDef.shaderStage)
		return subgroups::makeTessellationEvaluationFrameBufferTest(context,  VK_FORMAT_R32_UINT, &inputData, 1, DE_NULL, checkVertexPipelineStages, VK_SHADER_STAGE_TESSELLATION_EVALUATION_BIT);
	else
		TCU_THROW(InternalError, "Unhandled shader stage");
}


tcu::TestStatus test(Context& context, const CaseDefinition caseDef)
{
	if (VK_SHADER_STAGE_COMPUTE_BIT == caseDef.shaderStage)
	{
		if (!subgroups::areSubgroupOperationsSupportedForStage(context, caseDef.shaderStage))
		{
			return tcu::TestStatus::fail(
					"Shader stage " +
					subgroups::getShaderStageName(caseDef.shaderStage) +
					" is required to support subgroup operations!");
		}
		subgroups::SSBOData inputData;
		inputData.format = caseDef.format;
		inputData.layout = subgroups::SSBOData::LayoutStd430;
		inputData.numElements = subgroups::maxSupportedSubgroupSize();
		inputData.initializeType = subgroups::SSBOData::InitializeNonZero;

		if (caseDef.requiredSubgroupSize == DE_FALSE)
			return subgroups::makeComputeTest(context, VK_FORMAT_R32_UINT, &inputData, 1, DE_NULL, checkCompute);

		tcu::TestLog& log = context.getTestContext().getLog();
		VkPhysicalDeviceSubgroupSizeControlPropertiesEXT subgroupSizeControlProperties;
		subgroupSizeControlProperties.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SUBGROUP_SIZE_CONTROL_PROPERTIES_EXT;
		subgroupSizeControlProperties.pNext = DE_NULL;
		VkPhysicalDeviceProperties2 properties;
		properties.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PROPERTIES_2;
		properties.pNext = &subgroupSizeControlProperties;

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

		log << tcu::TestLog::Message << "Testing required subgroup size range [" <<  subgroupSizeControlProperties.minSubgroupSize << ", "
			<< subgroupSizeControlProperties.maxSubgroupSize << "]" << tcu::TestLog::EndMessage;

		// According to the spec, requiredSubgroupSize must be a power-of-two integer.
		for (deUint32 size = subgroupSizeControlProperties.minSubgroupSize; size <= subgroupSizeControlProperties.maxSubgroupSize; size *= 2)
		{
			tcu::TestStatus result = subgroups::makeComputeTest(context, VK_FORMAT_R32_UINT, &inputData, 1, DE_NULL, checkCompute,
																size, VK_PIPELINE_SHADER_STAGE_CREATE_REQUIRE_FULL_SUBGROUPS_BIT_EXT);
			if (result.getCode() != QP_TEST_RESULT_PASS)
			{
				log << tcu::TestLog::Message << "subgroupSize " << size << " failed" << tcu::TestLog::EndMessage;
				return result;
			}
		}

		return tcu::TestStatus::pass("OK");
	}
	else
	{
		VkPhysicalDeviceSubgroupProperties subgroupProperties;
		subgroupProperties.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SUBGROUP_PROPERTIES;
		subgroupProperties.pNext = DE_NULL;

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

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

		VkShaderStageFlagBits stages = (VkShaderStageFlagBits)(caseDef.shaderStage  & subgroupProperties.supportedStages);

		if (VK_SHADER_STAGE_FRAGMENT_BIT != stages && !subgroups::isVertexSSBOSupportedForDevice(context))
		{
			if ( (stages & VK_SHADER_STAGE_FRAGMENT_BIT) == 0)
				TCU_THROW(NotSupportedError, "Device does not support vertex stage SSBO writes");
			else
				stages = VK_SHADER_STAGE_FRAGMENT_BIT;
		}

		if ((VkShaderStageFlagBits)0u == stages)
			TCU_THROW(NotSupportedError, "Subgroup operations are not supported for any graphic shader");

		subgroups::SSBOData inputData;
		inputData.format			= caseDef.format;
		inputData.layout			= subgroups::SSBOData::LayoutStd430;
		inputData.numElements		= subgroups::maxSupportedSubgroupSize();
		inputData.initializeType	= subgroups::SSBOData::InitializeNonZero;
		inputData.binding			= 4u;
		inputData.stages			= stages;

		return subgroups::allStages(context, VK_FORMAT_R32_UINT, &inputData,
									1, DE_NULL, checkVertexPipelineStages, stages);
	}
}
}

namespace vkt
{
namespace subgroups
{
tcu::TestCaseGroup* createSubgroupsArithmeticTests(tcu::TestContext& testCtx)
{
	de::MovePtr<tcu::TestCaseGroup> graphicGroup(new tcu::TestCaseGroup(
		testCtx, "graphics", "Subgroup arithmetic category tests: graphics"));
	de::MovePtr<tcu::TestCaseGroup> computeGroup(new tcu::TestCaseGroup(
		testCtx, "compute", "Subgroup arithmetic category tests: compute"));
	de::MovePtr<tcu::TestCaseGroup> framebufferGroup(new tcu::TestCaseGroup(
		testCtx, "framebuffer", "Subgroup arithmetic category tests: framebuffer"));

	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,
	};

	const std::vector<VkFormat> formats = subgroups::getAllFormats();

	for (size_t formatIndex = 0; formatIndex < formats.size(); ++formatIndex)
	{
		const VkFormat format = formats[formatIndex];

		for (int opTypeIndex = 0; opTypeIndex < OPTYPE_LAST; ++opTypeIndex)
		{
			bool isBool = subgroups::isFormatBool(format);
			bool isFloat = subgroups::isFormatFloat(format);

			OpType opType = static_cast<OpType>(opTypeIndex);
			Operator op = getOperator(opType);
			ScanType st = getScanType(opType);

			bool isBitwiseOp = (op == OPERATOR_AND || op == OPERATOR_OR || op == OPERATOR_XOR);

			// Skip float with bitwise category.
			if (isFloat && isBitwiseOp)
				continue;

			// Skip bool when its not the bitwise category.
			if (isBool && !isBitwiseOp)
				continue;

			const std::string name = de::toLower(getOpTypeName(op, st)) + "_" + subgroups::getFormatNameForGLSL(format);

			{
				CaseDefinition caseDef = {op, st, VK_SHADER_STAGE_COMPUTE_BIT, format, de::SharedPtr<bool>(new bool), DE_FALSE};
				addFunctionCaseWithPrograms(computeGroup.get(), name,
											"", supportedCheck, initPrograms, test, caseDef);
				caseDef.requiredSubgroupSize = DE_TRUE;
				addFunctionCaseWithPrograms(computeGroup.get(), name + "_requiredsubgroupsize",
											"", supportedCheck, initPrograms, test, caseDef);
			}

			{
				const CaseDefinition caseDef = {op, st, VK_SHADER_STAGE_ALL_GRAPHICS, format, de::SharedPtr<bool>(new bool), DE_FALSE};
				addFunctionCaseWithPrograms(graphicGroup.get(), name,
											"", supportedCheck, initPrograms, test, caseDef);
			}

			for (int stageIndex = 0; stageIndex < DE_LENGTH_OF_ARRAY(stages); ++stageIndex)
			{
				const CaseDefinition caseDef = {op, st, stages[stageIndex], format, de::SharedPtr<bool>(new bool), DE_FALSE};
				addFunctionCaseWithPrograms(framebufferGroup.get(), name +
											"_" + getShaderStageName(caseDef.shaderStage), "",
											supportedCheck, initFrameBufferPrograms, noSSBOtest, caseDef);
			}
		}
	}

	de::MovePtr<tcu::TestCaseGroup> group(new tcu::TestCaseGroup(
		testCtx, "arithmetic", "Subgroup arithmetic category tests"));

	group->addChild(graphicGroup.release());
	group->addChild(computeGroup.release());
	group->addChild(framebufferGroup.release());

	return group.release();
}
} // subgroups
} // vkt