glm/test/gtx/gtx-simd-mat4.cpp

///////////////////////////////////////////////////////////////////////////////////////////////////
// OpenGL Mathematics Copyright (c) 2005 - 2010 G-Truc Creation (www.g-truc.net)
///////////////////////////////////////////////////////////////////////////////////////////////////
// Created : 2010-09-16
// Updated : 2010-09-16
// Licence : This source is under MIT licence
// File    : test/gtx/simd-mat4.cpp
///////////////////////////////////////////////////////////////////////////////////////////////////

#define GLM_INSTRUCTION_SET GLM_PLATFORM_SSE3
#include <glm/glm.hpp>
#include <glm/gtx/simd_mat4.hpp>
#include <glm/gtx/random.hpp>
#include <iostream>
#include <ctime>
#include <vector>
#include <array>

std::vector<float> test_detA(std::vector<glm::mat4> const & Data)
{
	std::vector<float> Test(Data.size());

	std::clock_t TimeStart = clock();

	for(std::size_t i = 0; i < Test.size(); ++i)
		Test[i] = glm::determinant(Data[i]);

	std::clock_t TimeEnd = clock();
	printf("Det A: %d\n", TimeEnd - TimeStart);

	return Test;
}

std::vector<float> test_detB(std::vector<glm::mat4> const & Data)
{
	std::vector<float> Test(Data.size());

	std::clock_t TimeStart = clock();

	for(std::size_t i = 0; i < Test.size(); ++i)
	{
		glm::simd_mat4 m(Data[i]);
		Test[i] = glm::simd_vec4(glm::detail::sse_slow_det_ps((__m128 const * const)&m)).x; 
	}

	std::clock_t TimeEnd = clock();
	printf("Det B: %d\n", TimeEnd - TimeStart);

	return Test;
}

std::vector<float> test_detC(std::vector<glm::mat4> const & Data)
{
	std::vector<float> Test(Data.size());

	std::clock_t TimeStart = clock();

	for(std::size_t i = 0; i < Test.size(); ++i)
	{
		glm::simd_mat4 m(Data[i]);
		Test[i] = glm::simd_vec4(glm::detail::sse_det_ps((__m128 const * const)&m)).x; 
	}

	std::clock_t TimeEnd = clock();
	printf("Det C: %d\n", TimeEnd - TimeStart);

	return Test;
}

std::vector<float> test_detD(std::vector<glm::mat4> const & Data)
{
	std::vector<float> Test(Data.size());

	std::clock_t TimeStart = clock();

	for(std::size_t i = 0; i < Test.size(); ++i)
	{
		glm::simd_mat4 m(Data[i]);
		Test[i] = glm::simd_vec4(glm::detail::sse_detd_ps((__m128 const * const)&m)).x; 
	}

	std::clock_t TimeEnd = clock();
	printf("Det C: %d\n", TimeEnd - TimeStart);

	return Test;
}

int main(int argc, void* argv[])
{
	std::vector<glm::mat4> Data(1024 * 1024 * 16);
	for(std::size_t i = 0; i < Data.size(); ++i)
		Data[i] = glm::mat4(
			glm::vec4(glm::compRand4(-2.0f, 2.0f)),
			glm::vec4(glm::compRand4(-2.0f, 2.0f)),
			glm::vec4(glm::compRand4(-2.0f, 2.0f)),
			glm::vec4(glm::compRand4(-2.0f, 2.0f)));

	std::vector<float> TestDetA = test_detA(Data);
	std::vector<float> TestDetB = test_detB(Data);
	std::vector<float> TestDetC = test_detC(Data);
	std::vector<float> TestDetD = test_detD(Data);

	for(std::size_t i = 0; i < TestDetA.size(); ++i)
		if(TestDetA[i] != TestDetB[i] && TestDetC[i] != TestDetB[i] && TestDetC[i] != TestDetD[i])
			return 1;

	// shuffle test
	glm::simd_vec4 A(1.0f, 2.0f, 3.0f, 4.0f);
	glm::simd_vec4 B(5.0f, 6.0f, 7.0f, 8.0f);
	__m128 C = _mm_shuffle_ps(A.Data, B.Data, _MM_SHUFFLE(1, 0, 1, 0));

	return 0;
}